Consulta: subjectFacets:"Community composition"
Registros recuperados: 44
Data/hora: 08/06/2024 14:13:26

Native and exotic woody vegetation communities in domestic gardens in relation to social and environmental factors
Provedor de dados: Ecology and Society
Autores: van Heezik, Yolanda M.; University of Otago; yolanda.vanheezik@otago.ac.nz; Freeman, Claire; University of Otago; cf@geography.otago.ac.nz; Porter, Stefan; University of Otago; nz_seti@hotmail.com; Dickinson, Katharine J. M.; University of Otago; kath.dickinson@botany.otago.ac.nz.
Tipo: Peer-Reviewed Reports
Palavras-chave: Assemblages; Communities; Community composition; Diversity; Plants.
Ano: 2014

Small-scale connectivity of coralligenous habitats: insights from a modelling approach within a semi-opened Mediterranean bay
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Rossi, Vincent; Lo, Madiop; Legrand, Terence; Ser-giacomi, Enrico; De Jode, Aurélien; Thierry De Ville D’avray, Laure; Pairaud, Ivane; Faure, Vincent; Fraysse, Marion; Pinazo, Christel; Chenuil, Anne.
Habitat connectivity is central to several key evolutionary and ecological processes, having implications for the spatial structuring of marine populations. For benthic species that have no or little mobility as adults, connectivity is evaluated by analyzing the dispersal of propagules across the seascape. We investigate fine-scale connectivity of coralligenous habitats in Marseille Bay (located in the north-western Mediterranean) sea using high-resolution cartography and a particle-tracking model ran over a range of parameters derived from the biological traits of potential target species. We present annual and seasonal means of various connectivity diagnostics measuring the retention and exchange of propagules among coralligenous patches. A synthetic...
Tipo: Text
Palavras-chave: Habitat connectivity; Larval dispersal; Coralligenous assemblages; Benthic organisms; Oceanic circulation; Lagrangian modeling; Population genetics; Community composition.
Ano: 2021
URL: https://archimer.ifremer.fr/doc/00680/79225/81737.pdf

Late spring bloom development of pelagic diatoms in Baffin Bay
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Lafond, Augustin; Leblanc, Karine; Queguiner, Bernard; Moriceau, Brivaela; Leynaert, Aude; Cornet, Veronique; Legras, Justine; Ras, Josephine; Parenteau, Marie; Garcia, Nicole; Babin, Marcel; Tremblay, Jean-eric.
The Arctic Ocean is particularly affected by climate change, with changes in sea ice cover expected to impact phytoplankton primary production. During the Green Edge expedition, the development of the late spring-early summer diatom bloom was studied in relation with the sea ice retreat by multiple transects across the marginal ice zone. Biogenic silica concentrations and uptake rates were measured. In addition, diatom assemblage structures and their associated carbon biomass were determined, along with taxon-specific contributions to total biogenic silica production using the fluorescent dye PDMPO. Results indicate that a diatom bloom developed in open waters close to the ice edge, following the alleviation of light limitation, and extended 20-30 km...
Tipo: Text
Palavras-chave: Diatoms; Spring bloom; Sea ice; Community composition; Baffin Bay; Arctic.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00615/72752/72021.pdf

Copepod colonization of organic and inorganic substrata at a deep-sea hydrothermal vent site on the Mid-Atlantic Ridge
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Plum, Christoph; Pradillon, Florence; Fujiwara, Yoshihiro; Sarrazin, Jozee.
The few existing studies on deep-sea hydrothermal vent copepods indicate low connectivity with surrounding environments and reveal high endemism among vents. However, the finding of non-endemic copepod species in association with engineer species at different reduced ecosystems poses questions about the dispersal of copepods and the colonization of hydrothermal vents as well as their ecological connectivity.  The objective of this study is to understand copepod colonization patterns at a hydrothermal vent site in response to environmental factors such as temperature and fluid flow as well as the presence of different types of substrata. To address this objective, an in situ experiment was deployed using both organic (woods, pig bones) and inorganic...
Tipo: Text
Palavras-chave: Chemosynthetic ecosystems; Ecological connectivity; Biodiversity and ecosystem functioning; Community composition; Colonization experiment; Hydrothermal activity.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00342/45318/44776.pdf

The Seasonal and Inter-Annual Fluctuations of Plankton Abundance and Community Structure in a North Atlantic Marine Protected Area
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Benedetti, Fabio; Jalabert, Laëtitia; Sourisseau, Marc; Becker, Beatriz; Cailliau, Caroline; Desnos, Corinne; Elineau, Amanda; Irisson, Jean-olivier; Lombard, Fabien; Picheral, Marc; Stemmann, Lars; Pouline, Patrick.
Marine Protected Areas have become a major tool for the conservation of marine biodiversity and resources. Yet our understanding of their efficacy is often limited because it is measured for a few biological components, typically top predators or species of commercial interest. To achieve conservation targets, marine protected areas can benefit from ecosystem-based approaches. Within such an approach, documenting the variation of plankton indicators and their covariation with climate is crucial as plankton represent the base of the food webs. With this perspective, we sought to document the variations in the emerging properties of the plankton to better understand the dynamics of the pelagic fishes, mammals and seabirds that inhabit the region. For the...
Tipo: Text
Palavras-chave: Iroise Sea; Plankton; MPA; Temporal variability; Community composition; Size structure.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00490/60213/63561.pdf

Brachyuran crab community structure and associated sediment reworking activities in pioneer and young mangroves of French Guiana, South America
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Aschenbroich, Adelaide; Michaud, Emma; Stieglitz, Thomas; Fromard, Francois; Gardel, Antoine; Tavares, Marcos; Thouzeau, Gerard.
This study in French Guiana evaluates the changes of crab assemblages and their bioturbation activities between mangrove early stages (pioneer and young mangrove) and within stages by taking their spatial heterogeneity (tidal channels, flat areas, pools) into account. The results show differences in crab assemblage structure between and within the early stages of mangrove in relation to microhabitat and sediment characteristics. The sediment reworking rates are a function of the biomass or density of particular species (Ucides cordatus, Uca cumulanta) and burrower functional groups. Crab species or functional interaction mediate changes in sediment reworking rates suggesting the need to consider entire benthic communities rather than single species. This...
Tipo: Text
Palavras-chave: Mangroves; Crabs; Community composition; Bioturbation; French Guiana; Amazon.
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00350/46154/45852.pdf

The problems of application of radiocarbon method for estimation of primary production in oligotrophic waters
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Krupatkina, D; Berland, B; Maestrini, S.
The errors in primary production estimation by the radiocarbon method may differ from one trophic region to another. Such supposition is based on unequal phytoplanktonic structural characteristics of these regions. These errors are likely to appear rather significant in oligotrophic waters predominated by nano- and ultranano-plankton (the so-called picoplankton). The organic substance of oligotrophic waters is obviously produced by picoplankton for the most part, the need for clarifying possible errors when estimating primary production by the radiocarbon method, which is the purpose of the present work is urgent. For these topics in oligotrophic waters, measurements were carried out in two ways: (1) according to the generally accepted pattern (Sorokin,...
Tipo: Text
Palavras-chave: Methodology; Community composition; Nutrient cycles; Phytoplankton; Ecosystems; Carbon 14; Primary production; Analytical techniques.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-1522.pdf

Community composition and species richness of parasitoids infesting Yponomeuta species in the Netherlands
Provedor de dados: Naturalis Digital Academic Repository
Autores: Cleary, Daniel F.R.
Parasitoid assemblages infesting Yponomeuta species in the Netherlands were investigated. Parasitoid species richness and community composition were related to host species, habitat, temporal and spatial variation. Both community structure and species richness did not differ among habitats. There was no significant difference in species richness between years (1994 and 1995) but there was a significant difference in community composition. Community composition and species richness both differed among host species, although this latter result was solely due to the host species Y. evonymellus. There was no significant relationship between community similarity and distance. These results indicate that the parasitoids of the moth genus Yponomeuta in the...
Tipo: Article / Letter to the editor
Palavras-chave: ANOSIM; Beta diversity; Community composition; Distance; Species richness.
Ano: 2004
URL: http://www.repository.naturalis.nl/record/534398

Reconnaissance des éponges (&lt;Porifera : demospongiae&gt;) du banc Messioua (sud de la Tunisie)
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Zarrouk, S.; Ben Mustapha, K.; Romdhane, M.S.; El Abed, A.
Cette étude s’inscrit dans le cadre d’une contribution à l’inventaire des éponges en Tunisie. Une compagne d’étude d’une zone de pêche traditionnelle aux éponges, le banc Messioua (30 MN à l’est de Zarzis)  a permis l’étude de la systématique des éponges de 51 échantillons ont été récoltés de 16 station de profondeurs comprises entre 21 et 33 mètres. 29 espèces ont été  identifiées.
Tipo: Journal Contribution
Palavras-chave: Biodiversity; Check lists; Community composition; Quantitative distribution; Sponge fisheries; Taxonomy; Taxonomy; Biodiversity; Sponge fisheries; Http://aims.fao.org/aos/agrovoc/c_7631; Http://aims.fao.org/aos/agrovoc/c_33949; Http://aims.fao.org/aos/agrovoc/c_7320.
Ano: 2005
URL: http://hdl.handle.net/1834/3717

Epibionts on Flexopecten felipponei (Dall, 1922), an uncommon scallop from Argentina
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Schejter, L.; Bremec, C.
Flexopecten felipponei (Dall, 1922) is a non-commercial, seldom reported pectinid from the SW Atlantic Ocean. In this contribution we review its taxonomy, describe epifaunal species and their levels of encrustation, and discuss the composition of the macrobenthic assemblage where this scallop Iives. Eighteen epibiont taxa were observed to Iive on the valves of these scallops. The most frequent and abundant epibionts on F. felipponei were serpulids, barnacles, and oysters. Although both valves were encrusted, the left valves had higher percentages of coverage. The benthic community contained 69 invertebrate taxa that generally charaeterize other mid-shelf bottorns between 37°S and 39°S. Eight pea crabs of the species Tumidotheres maculatus (Say, 1818)were...
Tipo: Journal Contribution
Palavras-chave: Benthos; Taxonomy; Community composition; Benthos; Taxonomy; Http://aims.fao.org/aos/agrovoc/c_878; Http://aims.fao.org/aos/agrovoc/c_7631.
Ano: 2007
URL: http://hdl.handle.net/1834/1815

El efecto de la temporada ciclónica 2005 sobre el fitoplancton de la Bahía de Cienfuegos, Cuba
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Moreira, A.; Comas, A.; Seisdedo, M.; Barcia, S.
El fitoplancton es uno de los componentes más abundantes de la biodiversidad de la Bahía de Cienfuegos. Se estudió el impacto de la temporada ciclónica 2005 sobre la composición y abundancia de estos organismos en el período de marzo-octubre. La composición específica de microalgas planctónicas de la bahía en marzo estuvo dominada por diatomeas y dinoflagelados marino-estuarinos como Nitzschia  longissima, Thalassionema nitzschioides y Prorocentrum micans. Al final de la temporada ciclónica, los cambios en la estructura de la comunidad fitoplanctónica fueron drásticos, prácticamente no se registró fitoplancton marino en la bahía. Las microalgas dulciacuícolas de los géneros Chlorella, Monoraphidium, Cyclotella, Aulacoseira, Pseudoanabaena, Planktothrix,...
Tipo: Journal Contribution
Palavras-chave: Aquatic communities; Community composition; Bays; Planktonic algae.
Ano: 2012
URL: http://hdl.handle.net/1834/5699

Preliminary Study of Microzooplankton Grazing and Community Composition in the North of South China Sea in Autumn.
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Su, Qiang; Huang, Liangmin; Tan, Yehui; Xu, Runlin; Li, Tao; Xu, Zhanzhou; Zhang, Janlin; Qiu, Dajun.
Microzooplankton community composition in the north of South China Sea was investigated during autumn (between September and October), 2004. Dilution technique using chlorophyll a (Chl a) was employed to estimate grazing rates and grazing pressure. The results showed that Polymenophorea Oligotrichida was the dominant group with 16 species, and there were 4 species in Oligotrichina and 11 species in Tintinnina. The ciliates abundance ranged from 9 to 102 ind/m3. Instantaneous growth rates of phytoplankton (k) varied from 0.03 / d to 2.13 / d. Grazing rates of microzooplankton(g) ranged between 0.01 / d and 1.06 / d. The grazing pressure on initial phytoplankton stock (Pi) and primary production (Pp) was 0.089 % - 65.23 % and 33.63 % - 86.04 %, respectively....
Tipo: Journal Contribution
Palavras-chave: Grazing; Community composition; Dilution.
Ano: 2007
URL: http://hdl.handle.net/1834/5862

Plancton alrededor de las Islas Galápagos durante el crucero oceanográfico efectuado en mayo de 2004
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Tapia, M.E.; Naranjo, Ch.
El presente trabajo comprende la composición y distribución del plancton en las Islas Galápagos. Para el efecto se establecieron 13 estaciones ubicadas en las secciones 92° - 90° y 89° W, realizadas en mayo del 2004.
Tipo: Journal Contribution
Palavras-chave: Plankton; Community composition; Distribution; Phytoplankton; Zooplankton; Diatoms; Biomass; Cruises; Biomass; Plankton; Distribution; Phytoplankton; Zooplankton; Diatoms; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_5950; Http://aims.fao.org/aos/agrovoc/c_35773; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_32657.
Ano: 2006
URL: http://hdl.handle.net/1834/2331

Macrofauna bentónica en la zona intermareal y submareal en Caleta Aeolian, Isla Baltra (Galápagos, Ecuador)
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Villamar, F.; Cruz, M.
Esta investigación tiene como propósito identificar y dar a conocer las especies de marco invertebrados bentónicos más comunes del área de la Caleta de Aeolian, Isla Baltra del Archipiélago de Galápagos, y conocer la actividad biológica de estos organismos marinos en la zona intermareal y submareal con la finalidad de determinar la composición, distribución y abundancia de cada uno de ellos y sus asociaciones existentes en la zona estudiada, como un marco referencial futuro que nos permita conocer los cambios para evaluar el impacto ambiental que puedan tener los hábitat de estos invertebrados marinos.
Tipo: Journal Contribution
Palavras-chave: Microorganisms; Abundance; Marine organisms; Community composition; Distribution; Marine invertebrates; Benthos; Intertidal environment; Distribution; Benthos; Intertidal environment; Microorganisms; Http://aims.fao.org/aos/agrovoc/c_35773; Http://aims.fao.org/aos/agrovoc/c_878; Http://aims.fao.org/aos/agrovoc/c_3923; Http://aims.fao.org/aos/agrovoc/c_4807.
Ano: 2007
URL: http://hdl.handle.net/1834/2405

Distribución cuali-cuantitativa del fitoplancton en el Pacífico sureste (3°16'-31°23'S), durante El Niño 1997-1998
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Torres, G.
El objetivo del presente artículo es estudiar la distribución de las concentraciones de clorofila "a" y feopigmentos en diciembre/97 y marzo/98, y cuales serían los indicadores biológicos del fitoplancton que han avanzado con la corriente cálida hacia el sur en diciembre/97, en condiciones de El Niño 97-98, en el Pacífico sudeste exceptuando la región peruana (Fig.1).
Tipo: Journal Contribution
Palavras-chave: Distribution; Phytoplankton; Biomass; Community composition; Diatoms; El Nino phenomena; Oceanographic stations; Chlorophylls; Distribution; Phytoplankton; Biomass; Diatoms; Chlorophylls.
Ano: 1998
URL: http://hdl.handle.net/1834/2393

Dinámica del ultrafitoplancton en el Mar Argentino
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Silva, R.I.
Ultraphytoplankton is composed by a group of organisms phylogenetically diverse, which contribute significantly to the total biomass and primary production in different oceanic and coastal pelagic systems. The success of ultraphytoplankton is attributed to its high efficiency in capturing light and nutrients, due to their small cell size and low sinking rate. The community structure is driven by the interaction among biotic and abiotic variables, such as temperature, nutrients, light and predators. The objective of this work was to assess the ecological importance of ultraphytoplankton organisms at the EPEA station, situated in the Buenos Aires coastal pelagic system (Argentina, SW Atlantic), during the period 2000-2009. In particular, ultraphytoplankton...
Tipo: Theses and Dissertations
Palavras-chave: Phytoplankton; Seasonal variations; Environmental factors; Community composition; Biomass; EPEA; Marine environment.
Ano: 2011
URL: http://hdl.handle.net/1834/4504

Características de algunas rayas de la región sudpatagónica
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Sánchez, M.F.; Mabragaña, E.
Data considered in this paper were obtained during a research cruise carried out on board of RV Dr. E.L. Holmberg from INIDEP (Instituto Nacional de Investigacion y Desarrollo Pesquero) during March-April 2000 in the area between 48°S and 55°S (S Patagonian) region, SW Atlantic. From 61 bottom trawls a total of 355 specimen belonging to 11 skate species were collected. This represents, in number, 1.8 of the total species biomass. All skate species were identified and some biological characteristics for each species analyzed. Abundance was estimated in tons and the distribution area of each species was determined. Total weight and morphometric data by sex were measured  total length, disc width and clasper length. Stomach content and macroscopical...
Tipo: Journal Contribution
Palavras-chave: Marine fish; Abundance; Stomach content; Food organisms; Diets; Feeding behaviour; Community composition; Feeding behaviour; Http://aims.fao.org/aos/agrovoc/c_10778.
Ano: 2002
URL: http://hdl.handle.net/1834/2426

Cambios de la densidad de los cladóceros P. avirrostris y E. tergentina durante las épocas cálidas y frías (Dic. 2004 y nov. 2005) en la Bahía de Santa Elena (La Libertad - Ecuador)
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Andrade, C.
El objetivo del presente estudio es determinar los cambios poblacionales durante las estaciones cálida y fría de este grupo taxonómico y del zooplancton acompañante más abundante en aguas de la Bahía de Santa Elena vs. las variables ambientales temperatura y salinidad.
Tipo: Journal Contribution
Palavras-chave: Zooplankton; Seasonal variations; Coastal waters; Community composition; Population number; Zooplankton; Coastal waters; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_25205.
Ano: 2007
URL: http://hdl.handle.net/1834/2345

Comunidades del zooplankton en los ríos Teaone, Esmeraldas, Terminal Petrolero y el balneario Las Palmas de Esmeraldas, durante el 2004
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Naranjo, Ch.
Los estudios del zooplancton en diferentes áreas principalmente en el río Teaone, Esmeraldas y la zona marino costera frente a la ciudad que incluye, el área del balneario Las Palmas, en el último año se ha intensificado con el objetivo de obtener un conocimiento detallado de la presencia de estos organismos y las características físico-químicas que condicionan su abundancia y distribución.
Tipo: Journal Contribution
Palavras-chave: Community composition; Zooplankton; Biological production; Salinity; Hydrogen; Water quality; Temporal variations; Species diversity; Zooplankton; Biological production; Water quality; Salinity; Hydrogen; Species diversity; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_36649; Http://aims.fao.org/aos/agrovoc/c_16061; Http://aims.fao.org/aos/agrovoc/c_6751; Http://aims.fao.org/aos/agrovoc/c_3724; Http://aims.fao.org/aos/agrovoc/c_33954.
Ano: 2005
URL: http://hdl.handle.net/1834/2372

Reconnaissance des éponges (&lt;Porifera : demospongiae&gt;) du banc Messioua (sud de la Tunisie)
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Zarrouk, S.; Ben Mustapha, K.; Romdhane, M.S; El Abed, A.
Cette étude s’inscrit dans le cadre d’une contribution à l’inventaire des éponges en Tunisie. Une compagne d’étude d’une zone de pêche traditionnelle aux éponges, le banc Messioua (30 MN à l’est de Zarzis)  a permis l’étude de la systématique des éponges de 51 échantillons ont été récoltés de 16 station de profondeurs comprises entre 21 et 33 mètres. 29 espèces ont été  identifiées.
Tipo: Journal Contribution
Palavras-chave: Biodiversity; Check lists; Community composition; Quantitative distribution; Sponge fisheries; Taxonomy; Taxonomy; Biodiversity; Sponge fisheries; Http://aims.fao.org/aos/agrovoc/c_7631; Http://aims.fao.org/aos/agrovoc/c_33949; Http://aims.fao.org/aos/agrovoc/c_7320.
Ano: 2005
URL: http://hdl.handle.net/1834/3709

Variación estacional del zooplancton en el sector estuarial de la laguna Mar Chiquita. Su relación con algunas variables ambientales.
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Firpo, C.
El zooplancton de lagunas costeras se caracteriza por su baja diversidad y la dominancia de algunas especies que toleran sus condiciones ambientales cambiantes. La laguna costera Mar Chiquita está ubicada a los 37º32'S - 37º45’S y 57º19’-57º26’ W, posee un cuerpo lagunar de escasa profundidad y un canal por el cual se conecta con el mar, que posee características estuariales. Dada la escasa información referida al zooplancton de esta laguna el presente trabajo tiene como objetivo describir la taxocenosis del zooplancton, las variaciones estacionales de la abundancia y diversidad y la relación de dichas variaciones con la salinidad y temperatura, para dos estaciones ubicadas en el sector estuarial. Los muestreos mensuales se realizaron en dos estaciones...
Tipo: Theses and Dissertations
Palavras-chave: Zooplankton; Seasonal variations; Environmental conditions; Abundance; Community composition; Brackishwater environment; Coastal lagoons; Zooplankton; Environmental conditions; Coastal lagoons.
Ano: 2002
URL: http://hdl.handle.net/1834/3911

Composición, distribución y abundancia relativa de copépodos pelágicos calanoideos y no calanoideos en aguas ecuatorianas durante el evento La Niña en septiembre de 2001
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Tutasi, P.
El presente trabajo es una contribución para el conocimiento de la oceanografía biológica de la región ecuatorial tropical donde se manifiestan estas importantes perturbaciones climáticas.
Tipo: Journal Contribution
Palavras-chave: Community composition; Marine crustaceans; Abundance; Plankton; Zooplankton; Marine ecology; Indicator species; El Nino phenomena; Geographical distribution; Plankton; Zooplankton; Geographical distribution; Marine ecology; Indicator species.
Ano: 2006
URL: http://hdl.handle.net/1834/2329

The effect of water Hyacinth, Eichhornia Crassipes, infestation on phytoplankton productivity in Lake Naivasha and the status of control
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Mironga, John Momanyi.
The paper presents data collected in an assessment of effects of water hyacinth infestation on phytoplankton productivity in Lake Naivasha, Kenya. A summary of the status of control and strategies for the future is given. The ecological effects of water hyacinth, Eichhornia Crassipes, on Lake Naivasha have received little attention compared to the large body of work available on the weed’s socioeconomic impact on the country’s water ways and methods for its removal. This study was conducted to determine if water hyacinth infestation in Lake Naivasha affects phytoplankton productivity. Several sampling stations were set up in the lake at sites where the floating mats of the weed were present and sites where the weed was absent. Phytoplankton chlorophyll-a...
Tipo: Proceedings Paper
Palavras-chave: Aquatic plants; Freshwater weeds; Infestation; Primary production; Ecological crisis; Environmental effects; Check lists; Species diversity; Phytoplankton; Socioeconomic aspects; Biodiversity; Community composition; Primary production; Aquatic plants; Species diversity; Water hyacinth; Http://aims.fao.org/aos/agrovoc/c_34329; Http://aims.fao.org/aos/agrovoc/c_559; Http://aims.fao.org/aos/agrovoc/c_33954; Http://aims.fao.org/aos/agrovoc/c_15267.
Ano: 2006
URL: http://hdl.handle.net/1834/1497

Biodiversidad vegetal acuática de los humedales del río Chepu (Chiloé, Región de Los Lagos, Chile)
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: González López, C.A.
Se estudió la biodiversidad vegetal acuática y palustre de la Laguna Coluco que forma parte de los Humedales del río Chepu (Chiloé, Chile). La hoya hidrográfica del río Chepu comprende la laguna Coluco y los tributarios de la cuenca: ríos Huentru, Negro, Puntra, Grande, Coluco, abarcando aproximadamente 100 km^2. Los muestreos de terreno se realizaron con la metodología fitosociológica de la Escuela Zürich – Montpellier. Con los censos de vegetación levantados a lo largo del transecto, se confeccionó una tabla fitosociológica inicial con 120 censos y 88 especies vegetales. Esta tabla fue ordenada con los métodos tradicionales, lográndose determinar las 16 asociaciones siguientes: Myriophylletum aquaticum, Potametum pectinatii, Juncetum bulbosii, Potametum...
Tipo: Theses and Dissertations
Palavras-chave: Biodiversity; Community composition; Wetlands; Vegetation cover; Aquatic plants.
Ano: 2005
URL: http://hdl.handle.net/1834/4916

Estrategias de vida de los copépodos Drepanopus forcipatus y Calanus australis en relación con los recursos tróficos en la plataforma patagónica austral (Argentina, 47°- 55°S)
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Antacli, J.C.
This Thesis contributes to elucidate the life cycle strategies of two copepod species, the medium-size clausocalanid Drepanopus forcipatus Giesbrecht, 1888 and the large calanid Calanus australis Brodsky, 1959, in relation to the environmental conditions in the southern Patagonian shelf (47°-55°S). This research was mainly carried out with samples collected in late summer/early autumn (March/April, 2004) onboard RV "Dr. E. L. Holmberg" (INIDEP, Mar del Plata). An additional sampling performed during early spring (October, 2005) with RV "Puerto Deseado" (CONICET) was also utilized. The present study was based on the following research questions: 1) Which is the available food for copepod populations by late summer? 2) Which is the relative contribution of...
Tipo: Theses and Dissertations
Palavras-chave: Zooplankton; Trophic levels; Population structure; Hydrography; Community composition.
Ano: 2011
URL: http://hdl.handle.net/1834/4205

Cambio temporal en la estructura de la comunidad coralina del área de Santa Marta - Parque Nacional Natural Tayrona (Caribe colombiano)
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Martínez, S.; Acosta, A.
Several predictions have been made, about magnitude and direction of temporal changes in the coral community structure, during the last decade. However, few studies have demonstrated it quantitatively. In order to document such changes, the coral community structure was studied in four continental reefs in the Colombian Caribbean, two in the Santa Marta region: Punta Betín (PB) and Morro Grande Island (MO), and two in the Tayrona National Natural Park (PNNT): Granate cove (GR) and Gayraca bay (GA). Coral composition and cover were quantified in 2002 and compared to base line studies from 1989 (PB, MO &amp; GR) and from 1992 (GA). These variables were quantified by 20 m linear transects between 1.5 m and 29 m depth. After a decade, all reefs lost in average...
Tipo: Journal Contribution
Palavras-chave: Coral reefs; Degradation; Temporal variations; Community composition; Coral reefs; Degradation; Http://aims.fao.org/aos/agrovoc/c_1880; Http://aims.fao.org/aos/agrovoc/c_2159.
Ano: 2005
URL: http://hdl.handle.net/1834/2012

Patrón espacial y temporal de las áreas de asociaciones ícticas demersales costeras (34°S-41°S) y su relación con los factores ambientales.
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Jaureguizar, A.J.
The spatial and temporal changes of the fish assemblage areas composition at the coastal ecosystem of the western South Atlantic (34 degree -41 degree S) during six springs (1981, 1983, 1994, 1995, 1998 and 1999), were examined. For each assemblage area the most common species and those species that discriminate it from adjacent assemblages areas within years, were identified. Within each area, also resident (common in all years) and facultative (contributing to less than 90% of similarity within any year) species, were studied. Also were identified what parameters control the main structuring of the fish community on the spatial and temporal patterns. In order to determine how the environmental factors influenced the fish community structure, the...
Tipo: Theses and Dissertations
Palavras-chave: Marine fish; Community composition; Coastal fisheries; Ecosystem management; Species diversity; Coastal zone; Ecological zonation; Environmental factors; Assemblages; Ecological zonation; Environmental factors; Coastal fisheries; Species diversity; Http://aims.fao.org/aos/agrovoc/c_2465; Http://aims.fao.org/aos/agrovoc/c_2594; Http://aims.fao.org/aos/agrovoc/c_1696; Http://aims.fao.org/aos/agrovoc/c_33954.
Ano: 2004
URL: http://hdl.handle.net/1834/1469

Composición y variación estacional del fitoplancton, zooplancton y microbentos en el estuario interior del Golfo de Guayaquil, durante el año 2003
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Gualancañay, E.; Tapia, M.E.; Naranjo, Ch.
El presente trabajo comprende el estudio de la distribution cualitativa y cuantitativa del fitoplancton en el Golfo de Guayaquil, durante dos épocas: Húmeda y seca. El propósito del presente trabajo con respecto al zooplankton está orientado a conocer los cambios en la composición, abundancia y diversidad del zooplancton y en particular el Phyllum Chaetognatha con el objetivo de relacionar la distribución de las especies de Quetognatos con los parámetros físicos. En lo relacionado al estudio del microbentos, se pretende estudiar la composición específica y la abundancia relativa de las especies de la microflora béntica y de la microfauna bentónica y su relación con factores ambientales.
Tipo: Journal Contribution
Palavras-chave: Community composition; Seasonal variations; Phytoplankton; Diatoms; Biomass; Zooplankton; Microorganisms; Benthos; Geographical distribution; Estuaries; Phytoplankton; Biomass; Zooplankton; Benthos; Geographical distribution; Estuaries; Diatoms; Microorganisms; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_926; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_878; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_2673; Http://aims.fao.org/aos/agrovoc/c_32657; Http://aims.fao.org/aos/agrovoc/c_4807.
Ano: 2004
URL: http://hdl.handle.net/1834/2283

Estudio de la comunidad fitoplanctónica en el estuario interior de Esmeraldas, Ecuador durante mayo de 2002
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Tapia, M.E.
El presente trabajo tiene por finalidad determinar la composición, abundancia y distribution de las especies que se encuentran en los ríos de la ciudad de Esmeraldas.
Tipo: Journal Contribution
Palavras-chave: Chlorophylls; Phytoplankton; Abundance; Diatoms; Species diversity; Cell counters; Estuaries; Community composition; Distribution; Phytoplankton; Estuaries; Distribution; Chlorophylls; Diatoms; Species diversity; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_2673; Http://aims.fao.org/aos/agrovoc/c_35773; Http://aims.fao.org/aos/agrovoc/c_1577; Http://aims.fao.org/aos/agrovoc/c_32657; Http://aims.fao.org/aos/agrovoc/c_33954.
Ano: 2003
URL: http://hdl.handle.net/1834/2402

Variabilite mensuelle du zooplancton et de l'ichtyoplancton dans le golfe de Tunis
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Missaoui, H.; El Abed, A.; M'rabet, R.; Romdhane, M.S.; Zarrad, R.; Jarboui, O.
Monthly variability of zooplankton and ichthyoplankton abundance and composition were studied in 6 stations in the Gulf of Tunis between February 2003 and January 2004. Plankton trawls were horizontal, in surface and at night. Study area seems to be influenced by climatic conditions and the outflow of Majreda River that affect the surface temperature and salinity. Copepods, with many abundance peaks in the year, formed the most abundant group (84%) followed by cladocerans (8%) and chaetognaths (3%). The appendicularians, cladocerans and medusae had swarms in the summer, the creseis and the chaetognths in the autun and the zoae larvae in the spring. The highest fish spawning periods was in summer then the highest larva abundance was in winter and...
Tipo: Journal Contribution
Palavras-chave: Community composition; Fish larvae; Ichthyoplankton; Temporal variations; Zooplankton; Zooplankton; Fish larvae; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_2924.
Ano: 2004
URL: http://hdl.handle.net/1834/4242

Comunidades del plancton en la Caleta Aeolian de la Isla Baltra - Galápagos (Ecuador), durante 2005
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Naranjo, Ch.; Tapia, M.E.
El propósito del trabajo es determinar la composición, abundancia de los grupos dominantes del fitoplancton y zooplancton, establecer las especies de Quetognatos y su relación con la temperatura superficial del mar durante marzo de 2005 correspondiente a la época húmeda.
Tipo: Journal Contribution
Palavras-chave: Plankton; Primary production; Biological production; Phytoplankton; Zooplankton; Biomass; Abundance; Community composition; Fish eggs; Surface temperature; Plankton; Primary production; Biological production; Phytoplankton; Zooplankton; Biomass; Http://aims.fao.org/aos/agrovoc/c_5950; Http://aims.fao.org/aos/agrovoc/c_34329; Http://aims.fao.org/aos/agrovoc/c_36649; Http://aims.fao.org/aos/agrovoc/c_13344; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_926.
Ano: 2007
URL: http://hdl.handle.net/1834/2346

Asociación bentónicas en bancos de vieira patagónica (Zygochlamys patagonica) en el Mar Argentino
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Schejter, L.
The different aspects of the benthic assemblages at the Patagonian scallop beds in the Argentine Sea (SW Atlantic) were studied. The Patagonian scallop (Zygochlamys patagonica) is a commercial species distributed in the Magellanic Biogeographic Province, and has been commercially exploited since 1996. Temporal and spatial studies were performed in the community composition between 39°50'S and 36°15'S, and between 1998 and 2003, concluding that the species association was persistent after more than 7 years of trawling activities. Species composition in an exclusion area (closed to scallop fishing) did not differ from surrounding fished areas during the studied period, showing only a higher scallop biomass. ABC curves showed a pattern coincident with a non...
Tipo: Theses and Dissertations
Palavras-chave: Zoobenthos; Community composition; Long-term changes; Short-term changes; Species diversity; Fishing grounds; Epibionts; Scallop fisheries; Multivariate analysis; Multivariate analysis; Zoobenthos; Species diversity; Fishing grounds.
Ano: 2005
URL: http://hdl.handle.net/1834/3917

Estudio de la composición específica, abundancia y distribución espacial del microzooplancton (protozoos y micrometazoos) en el estuario del Río de la Plata (Argentina-Uruguay)
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Kogan, M.
Species composition, abundance and spatial distribution of microzooplancton (20-200 km)from the Río de la Plata Estuary, Argentina-Uruguay, SW Atlantic (36°S 56°W)were studied from samples collected during two oceanographic cruises at the end of austral spring (in 1999 and 2001)across a gradient from fluvial to coastal waters (200 km). Heterotrophic dinoflagellates, aloricate ciliates, tintinnids, radiolarians, rotifers and copepod nauplii were found. More than 110 taxa were registered, 35 were new records for the area. Three microzooplanktonic assemblages were distinguished using cluster analysis. Species and groups spatial distribution (horizontal and vertical)was related to the distribution of the maxima gradients (salinity, turbidity, etc.), estuarine...
Tipo: Theses and Dissertations
Palavras-chave: Zooplankton; Abundance; Geographical distribution; Salinity stratification; Ecological associations; Brackishwater environment; Community composition; Vertical distribution; Zooplankton; Geographical distribution; Ecological associations; Brackishwater environment; Http://aims.fao.org/aos/agrovoc/c_15490; Http://aims.fao.org/aos/agrovoc/c_5083; Http://aims.fao.org/aos/agrovoc/c_32845; Http://aims.fao.org/aos/agrovoc/c_1050.
Ano: 2005
URL: http://hdl.handle.net/1834/2598

Estructura de la comunidad del fitoplancton en el área de El Rincón, Mar Argentino (febrero 2011)
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Negri, R.M.; Silva, R.I.; Segura, V.; Cucchi Colleoni, A.D.
The El Rincón area in the Argentine continental shelf (coastal sector between 39º S-41º S) is known as one of the main breeding areas of the Argentine anchovy (Engraulis anchoita) Northern stock. However, there is scarce information regarding the structure of the primary producers, base of the pelagic food webs. The aim of this study was to identify the different phytoplanktonic communities in a coastal section in the area (depth lower than 60 m) during February 2011. Mean surface chlorophyll a concentration was 0.72 mg m-3, with the highest value in the innermost station (E34: 1.84 mg m-3) and the lowest in the mid section (E31: 0.24 mg m-3). In depth, similar concentrations were registered, except for the deepest station where the maximum value was...
Tipo: Journal Contribution
Palavras-chave: Phytoplankton; Nannoplankton; Community composition; Size; Chlorophylls.
Ano: 2013
URL: http://hdl.handle.net/1834/5491

Aspectos bioecológicos del ictioplancton en la estación fija "La Libertad" durante 1997
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Luzuriaga de Cruz, M.; Ortega, D.; Elías, E.
El presente trabajo se refiere a las variaciones observadas en el ictioplancton presente en la estación fija "La Libertad" desde febrero de 1997 hasta diciembre del mismo año. Los datos se relacionan con las observaciones ecológicas hechas en base a indicadores de masas de agua, formaníferos planctónicos, presentes en las mismas muestras.
Tipo: Journal Contribution
Palavras-chave: Ichthyoplankton; Fixed stations; Fish larvae; Fish eggs; Foraminifera; Community composition; Species diversity; Fish larvae; Species diversity; Http://aims.fao.org/aos/agrovoc/c_2924; Http://aims.fao.org/aos/agrovoc/c_33954.
Ano: 1998
URL: http://hdl.handle.net/1834/2289

La salinidad y la distribución espacial de la ictiofauna en el estuario del Río de la Plata
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Rico, M.R.
Los ecosistemas estuariales se caracterizan por su alta productividad, baja diversidad biológica y fluctuaciones impredecibles de salinidad. A su vez, la distribución espacial de su ictiofauna resulta en general suficientemente explicada por los patrones de distribución de la salinidad. En particular, en el estuario del Río de la Plata (35° 00' S y 55° 30' W) que presenta una marcada estratificación vertical de densidad, dominada por la salinidad, se analizó cuantitativamente la relación entre dicha variable y la distribución espacial de su ictiofauna demersal. Se procesó y analizó información proveniente de siete campañas de evaluación pesquera realizadas por el Proyecto "Especies Demersales Costeras" del INIDEP en el área de estudio, durante las...
Tipo: Theses and Dissertations
Palavras-chave: Brackishwater fish; Salinity charts; Salinity effects; Salinity tolerance; Community composition; Species diversity; Brackishwater environment; Estuaries; Estuaries; Species diversity; Brackishwater environment; Http://aims.fao.org/aos/agrovoc/c_2673; Http://aims.fao.org/aos/agrovoc/c_33954; Http://aims.fao.org/aos/agrovoc/c_1050.
Ano: 2000
URL: http://hdl.handle.net/1834/2603

The abundance, biomass and composition of pelagic ciliates in East African lakes of different salinity and trophy
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Yasindi, A. W.; Taylor, W. D.
Planktonic ciliates were studied in 17 tropical East African lakes of different salinity and trophic status. Oligotrichs (e.g., Strombidium, Strobilidium and Halteria) and scuticociliates (e.g., Cyclidium, Pleuronema, Cristigera), dominated the ciliate communities. Conductivity and trophic status were the most important environmental variables influencing the distribution of ciliate species in East African lakes. Herbivorous oligotrichs were important in oligotrophic and mesotrophic lakes, as they are in temperate and subtropical lakes, but their importance decreased with increasing chlorophyll a concentration and conductivity. On the other hand, the importance of scuticociliates (primarily bacterivores) increased with increasing chlorophyll a and...
Tipo: Proceedings Paper
Palavras-chave: Freshwater lakes; Abundance; Biomass; Pelagic environment; Salinity; Plankton; Community composition; Oligotrophic lakes; Aquatic communities; Regression analysis; Tropical lakes; Species diversity; Plankton; Freshwater.
Ano: 2006
URL: http://hdl.handle.net/1834/5311

Meiobenthos of the central Arctic Ocean with special emphasis on the nematode community structure
Provedor de dados: Open Marine Archive
Autores: Vanreusel, A.; Clough, L.M.; Jacobsen, K.; Ambrose, W.; Jivaluk, J.; Ryheul, V.; Herman, R.; Vincx, M.
We investigated the abundance of the meiobenthos and the biomass and community structure of the nematodes in the central Arctic Ocean along two separate transects during 1991 and 1994. Meiobenthos abundances ranged from &lt; 100 to 600 individuals per 10 cm², in the same order of magnitude as in other oligotrophic areas of the world's deep ocean. Nematodes were the numerically dominant meiofaunal group at every station. Nematode biomass ranged from &lt; 1 to 48 µg dry weight per 10 cm². A combination of water depth and latitude explained 55% of the variability among stations in nematode biomass and 67% of the variability of total abundance, implying that both vertical and advective fluxes are important sources of food to the meiofaunal communities. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Community composition; Marine invertebrates; Meiobenthos; Spatial variations; Zoobenthos; Monhystera; Nematoda [Nematodes]; Pitcairn I.
Ano: 2000
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=7425

Early postlarval fish in the hyperbenthos of the Dutch Delta (south-west Netherlands)
Provedor de dados: Open Marine Archive
Autores: Beyst, B.; Mees, J.; Cattrijsse, A.
Early (post)larval fish constitute a significant part of the temporary hyperbenthos, i.e. of the fauna living in the lower reaches of the water column close to the substratum. Information on the densities and spatial and temporal variations of these stages, as well as on their lengths at the moment of occurrence, can be an important contribution to the knowledge of their dispersion, migrations and to the identification of possible bottlenecks in their recruitment. Therefore the hyperbenthos of the Voordelta, a shallow coastal zone in front of the Dutch Delta, as well as that of the subtidal channels and the intertidal brackish marsh creeks of the Westerschelde Estuary, was sampled monthly during one year by means of a sledge and a stow net. A total of 37...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Community composition; Deltas; Dominant species; Ecological distribution; Estuaries; Intertidal environment; Juveniles; Marine fish; Nursery grounds; Pleuronectes; Population density; Salt marshes; Sprattus sprattus; Wetlands; Zoobenthos; Clupea harengus; Dicentrarchus labrax [Bass]; Solea solea [Sole].
Ano: 1999
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3979

Determination of seasonal phytoplankton communities, based on quantitative data using a mathematical analysis
Provedor de dados: Open Marine Archive
Autores: Caljon, A.
The definition of algal communities has always been a very discussed subject. We applied a principal component analysis on quantitative phytoplankton data. This ordination technique made it possible to distinguish the algal groups present. This technique is very often applied in the phytosociology of higher plants but less frequently in the phytosociology of algae. Till now this ordination has been used in phycology, merely for marine- and freshwater benthic algae, e.g. the benthic diatoms of rivers (Descy 1976a, b).
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Community composition; Mathematical analysis; Phytoplankton; Seasonal variations.
Ano: 1978
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3581

Invasive wild boars and native mammals in agroecosystems in the Atlantic Forest of Western Brazil
Provedor de dados: Pesquisa Agropecuária Brasileira
Autores: Doutel-Ribas,Cynthia; Martins,Fernando Ibanez; Campos,Zilca; Piovezan,Ubiratan; Tomas,Walfrido; Silva,Virgínia Santiago; Pellegrin,Aiesca; Mourão,Guilherme.
Abstract: The objective of this work was to estimate an index of the relative biomass per species, in a medium to large-sized mammal community, as well as to determine how the introduced wild boar (Sus scrofa) fits into this index, and to verify if the occupancy of sites by domestic dogs interferes with those of wild boars and how much the periods of dogs’ activity overlap those of wild boars. The biomass/effort index was measured for each native mammal species and for the introduced wild boar, in two surveyed farms in Brazil’s Western Atlantic Forest range, through the use of camera trappings that were also used to verify if dogs and wild boar overlap in space and activity time. Wild boars seem to dominate the community, just a few years after their...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Canis familiaris; Sus scrofa; Activity time; Community composition; Niche overlap.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000104100

Local environmental controls of Atlantic Forest tree community assembly on a coastal continental island in southeastern Brazil
Provedor de dados: Acta Botanica Brasilica
Autores: Nettesheim,Felipe Cito; Garbin,Mário Luís; Pereira,Marcos Gervasio; Araujo,Dorothy Sue Dunn de.
ABSTRACT Tropical forests with high species diversity are commonly found in rugged montane areas. We investigated causes of local tropical forest tree community assembly on a continental island with heterogeneous terrain. We recorded tree community (absolute species abundance), topography, soil, litter and location in 40 sampling units on two opposite sides of the island with similar heterogeneous terrain. We used transformation based Redundancy Analyses and variation partitioning to determine the contribution of environment (topography, soil and litter), spatial structure (geographic location and Moran Eigenvector Maps) and the shared effects of these to explain community assembly. The environment made a significant contribution to explain tree community...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Community composition; Community structure; Floristics; Neutral; Niche; Soil; Spatial structure; Topography; Tropical forest.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019000100088

Land Flatworms (Platyhelminthes: Tricladida) in Remnants of Deciduous Forest in the Northeast Region Of Southern Brazil
Provedor de dados: Biota Neotropica
Autores: Amaral,Silvana Vargas do; Hack,Ilana Rossi; Iturralde,Giuly Gouvêa; Leal-Zanchet,Ana Maria.
Land flatworms show high endemism due to their restricted mobility. In southern Brazil, land flatworm communities have been found mainly in areas of ombrophilous forests. Thus, this study documents land planarian species composition in remnants of deciduous seasonal forest in the northeast region of southern Brazil. Direct, diurnal samplings reveal the occurrence of 26 species of land flatworms, of which one belongs to the subfamily Rhynchodeminae and the others to the subfamily Geoplaninae. The Rhynchodeminae genus Rhynchodemus Leidy 1851 and the following Geoplaninae genera occurred: CephaloflexaCarbayo &amp; Leal-Zanchet, 2003, Choeradoplana Graff, 1896, Imbira Carbayo et al., 2013, IssocaFroehlich, 1955, LuteostriataCarbayo, 2010, Obama Carbayo et al.,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biodiversity inventory; Planarians; Community composition; Neotropical Region.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032014000100203

Morpho-ecological characterization and composition of rocky fields bryophytes in Brazilian Cerrado
Provedor de dados: Boletín de la Sociedad Argentina de Botánica
Autores: Marchi Do Carmo,Dimas; Fernandes Peralta,Denilson.
The aim of this study is to provide information about ecological relations and floristic composition of bryophytes community in Brazilian Cerrado rocky fields in Minas Gerais state. There are few works of bryophyte communities and their relation with this environment for Brazilian Cerrado, besides this, these environments are submitted to several intense treats. For this study nine transects of 50 m with total of 45 plots were randomly sampled in order to analyze the composition and morpho-ecological traits of bryophytes communities. The diversity measures were performed using the PAST and EstimateS software to perform the clustering of the species found between the tree different areas of rocky fields. We found 176 occurrences of 47 bryophytes species in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Community composition; Dry environments; Ecology; Liverworts; Mosses; Richness.
Ano: 2017
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-23722017000200007