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Última Diversity patterns of hawkmoths (Lepidoptera: Sphingidae) in the canopy of an ombrophilous forest in Central Amazon, Brazil Acta Amazonica LOURIDO,Gilcélia Melo; MOTTA,Catarina da Silva; GRAÇA,Márlon Breno; RAFAEL,José Albertino. ABSTRACT Sphingidae attracted to light were systematically collected in an Amazonian forest canopy. Sampling occurred at a height of 34 m in an upland primary rainforest plateau in the Cueiras River basin, located within the Experimental Station of Tropical Silviculture, Manaus municipality, Amazonas, Brazil. The hawkmoths were collected using a vertical white sheet illuminated by a 250 W mixed mercury light and a 20 W black-light (BLB) fluorescent tube. Monthly collections were carried out from January to December 2004, during three nights of lunar transition from third quarter moon to new moon between 6 p.m. and 6 a.m. We sampled 1748 specimens, represented by 1485 males and 263 females, belonging to 52 species and 21 genera. Xylophanes comprised the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Amazon rainforest; Flight activity; Forest canopy; Species composition; Species richness. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672018000200117 Anuran diversity in urban and rural zones of the Itacoatiara municipality, central Amazonia, Brazil Acta Amazonica MENIN,Marcelo; FERREIRA,Rafaela Fernanda Batista; MELO,Izomar Barbosa; GORDO,Marcelo; HATTORI,Gustavo Yomar; SANT’ANNA,Bruno Sampaio. ABSTRACT Few studies in the Amazon region have evaluated anuran diversity in urban forest fragments or in areas with differing degrees of anthropogenic impact. We determined the composition and abundance of the anurofauna in urban and rural sites within the municipality of Itacoatiara in central Amazonia, Brazil. Specimens were sampled from January 2012 to May 2013 in 10 urban sites and five rural sites. A total of 1,538 anurans (930 in rural sites and 608 in urban sites) were recorded, belonging to 29 species in five families. Species richness was higher in rural sites, with 10 exclusive species. All species found in urban sites were also found in rural sites, however, species abundance varied considerably between the habitats. Sampling- and... Tipo: Info:eu-repo/semantics/article Palavras-chave: Floodplain forests; Unflooded forest; Rarefaction curves; Species composition; Time-constrained searches. Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672019000200122 THE VEGETATION OF A SEASONAL VÁRZEA FOREST IN THE LOWER SOLIMÕES RIVER, BRAZILIAN AMAZONIA Acta Amazonica KLINGE,Hans; ADIS,Joachim; WORBES,Martin. The species composition of the seasonal várzea forest growing on a bank of the Ilha de Marchantaria / lower Solimões-Amazonas River, Brazil was studied in an area of slightly less than one hectare. Two biomass plots were harvested. Forty-seven arboreal species representing 46 genera in 25 families were recorded. Tree density was 1086 per hectare. Total basal area was 45 m2 ha1. Mean species density was 6.5 ± 1.98 per 100 m2. The most abundant species were Crataeva benthamii(Capparidaceae), Laetia corymbutosa(Flacourtiaceae) and Vitex cymosa(Verbenaceae). The highest basal area per species was 10.2 m2 for Pseudobombax munguba(Bombacaceae). The common species are known to be typical floristic elements of the seasonal varzea forest. Above ground dry biomass... Tipo: Info:eu-repo/semantics/article Palavras-chave: Amazon; Bioelements; Biomass; Floodplain; Seasonal várzea forest; Species composition; Structure. Ano: 1995 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671995000400201 Changes in the taxonomic structure of periphytic algae on a free-floating macrophyte (Utricularia foliosa L.) in relation to macrophyte richness over seasons Acta Botanica Santos,Thiago Rodrigues dos; Ferragut,Carla. ABSTRACT Periphyton has a strong relationship with aquatic macrophytes, which are key components of spatial heterogeneity in the littoral zone. We evaluated the relationship between the community structure of periphytic algae on Utricularia foliosa and macrophyte richness and coverage and limnological variables in a shallow reservoir. Water sampling for physical, chemical and biological analyses was performed at sites with contrasting macrophyte coverage and richness in each of the four main seasons of the year. Periphytic algae were evaluated for density and species composition. High densities of diatoms and filamentous cyanobacteria in the periphyton were observed at sites with high macrophyte coverage and richness, while high abundances of flagellates... Tipo: Info:eu-repo/semantics/article Palavras-chave: Epiphytic algae; Limnological variables; Macrophyte structure; Spatial heterogeneity; Species composition. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000400595 Epiphytic microlichens as indicators of phytosociological differentiation between Caatinga and Brejos de Altitude Acta Botanica Leite,Amanda Barreto Xavier; Menezes,Aline Anjos de; Souto,Leandro de Sousa; Aptroot,André; Lücking,Robert; Santos,Viviane Monique dos; Cáceres,Marcela Eugenia da Silva. The present study tested the hypothesis that species richness and composition of epiphytic microlichens can be used to support the phytosociological differentiation between Caatinga and Brejos de Altitude, as exemplified by the Muralha Reserve (Caatinga) and the Parque Estadual Mata do Pau Ferro (Brejo de Altitude), in the state of Paraíba, Brazil. A total of 755 lichen samples were collected, comprising 18 families, 42 genera and 111 species of epiphytic, corticolous microlichens. Overall species richness was higher in the Caatinga, with 67 species, compared to the Brejo, with 46 species. Species richness per sample was significantly higher in the Caatinga compared to the Brejo. Taxonomic composition also differed significantly between the two areas, with... Tipo: Info:eu-repo/semantics/article Palavras-chave: Corticolous microlichens; Mata Pau-Ferro; Reserva Muralha; Species composition; Species richness. Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000400457 Does fire determine distinct floristic composition of two Cerrado savanna communities on different substrates? Acta Botanica Lenza,Eddie; Abadia,Ana Clara; Menegat,Hélio; Lúcio,Nadjarriny W.; Maracahipes-Santos,Leonardo; Mews,Henrique A.; Santos,Josias O. dos; Martins,Jhany. ABSTRACT We surveyed two savanna sites, one on flat terrain with deep soil (DS), and the other on hilly terrain with rocky outcrops and shallow soil (RS), before and after an accidental fire. We found that the fire did not cause any significant changes in the species composition or diversity of either community, and did not result in floristic homogenization. However, we did record a reduction in the density of plants and in basal area in the DS savanna in comparison with the RS savanna, as well as a higher rate of basal sprouting, which indicates a trade-off between mortality and sprouting. We conclude that, whereas post-fire changes in vegetation structure were more pronounced in the DS savanna than in the RS, the difference in the underlying substrate... Tipo: Info:eu-repo/semantics/article Palavras-chave: Diversity; Fire; Fuel; Savanna; Species composition. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000200250 Urban ethnobotany: a case study in neighborhoods of different ages in Chapecó, Santa Catarina State Acta Botanica Pradeiczuk,Aline; Eichemberg,Mayra Teruya; Kissmann,Camila. ABSTRACT The study of urban home gardens is still a current gap in knowledge in Brazilian ethnobotany researches, especially in the south of Brazil. This study was carried out to survey the species composition of plants in urban residential home gardens of two neighborhoods in the municipality of Chapecó (state of Santa Catarina, southern Brazil): an older neighborhood created prior to the 1950s, and a younger neighborhood created in the decade 1970-1980. It was hypothesized that the home gardens in the older neighborhood would be larger and have greater species richness than those in the younger neighborhood. Data from 10 home gardens in each neighborhood were collected through semi-structured interviews. The plants cited by interviewees were classified... Tipo: Info:eu-repo/semantics/article Palavras-chave: Alimentary plants; Ethnobotany; Medicinal plants; Ornamental plants; Species composition; Urban home gardens. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000200276 Species richness of testate amoebae in different environments from the upper Paraná river floodplain (PR/MS) - doi: 10.4025/actascibiolsci.v33i3.7261 Biological Sciences Costa, Deise de Morais; Universidade Estadual de Maringá; Alves, Geziele Mucio; UEM; Velho, Luiz Felipe Machado; UEM; Lansac-Tôha, Fábio Amodêo; UEM. This study evaluated the species richness of testate amoebae in the plankton from different environments of the upper Paraná river floodplain. Samplings were performed at subsurface of pelagic region from twelve environments using motorized pump and plankton net (68 µm), during four hydrological periods. We identified 67 taxa, distributed in seven families and Arcellidae, Difflugiidae and Centropyxidae were the most representative families. Higher values of species richness were observed in the lakes (connected and isolated) during the flood pulses. Centropyxis aculeata, Difflugia gramem and D. pseudogramem were frequent throughout the study period. Seasonal variability of species in the channels and isolated lakes was evidenced by beta... Palavras-chave: Protozoa; Plankton; Diversity; Species composition Protozoa; Plankton; Diversity; Species composition. Ano: 2011 URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/7261 Distribution of the assemblage of phlebotomine sandflies (Diptera: Psychodidae) along an environmental gradient Biota Neotropica Antonini,Yasmine; Fernandes,G. Wilson; Barata,Ricardo Andrade. Abstract The geographical distribution of leishmaniasis has undoubtedly expanded, and is now being reported to be in areas that were previously non-endemic. This study therefore aimed to investigate whether there is any variation in the structure and in the composition of phlebotomine communities along an environmental gradient - from a mesic to a xeric environment, across different climatic periods (rainy and dry seasons). Furthermore, we test whether there were differences in sex ratio of sand flies between wet and dry environments. A total of 535 specimens of sand flies belonging to 18 species were recorded. Richness, abundance, and composition of species were significatively higher in the xeric environment (semidecidual Forest) compared to the mesic... Tipo: Info:eu-repo/semantics/article Palavras-chave: Species composition; Ecology; Leishmaniasis; Atlantic Forest; Brazil. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032017000200202 Drosophilidae (Insecta, Diptera) in the state of Pará (Brazil) Biota Neotropica Santa-Brígida,Rosângela; Schmitz,Hermes José; Martins,Marlúcia Bonifácio. Abstract This list contains information on the Drosophilidae that occur in the Brazilian state of Pará, Amazon biome, and an analysis of the current knowledge of Drosophilidae based on museum material and literature records. This list includes a detailed account of the material deposited in the entomological collections of the Museu Paraense Emílio Goeldi and Museu de Zoologia da Universidade de São Paulo, up to 2015. In total, 122 species of Drosophilidae were registered, including 27 new records for the state of Pará and 22 are new records for the Amazon; for instance, the genera Diathoneura and Rhinoleucophenga, and three new records for Brazil, (Drosophila fasciola, Diathoneura flavolineata and Drosophila neochracea). The state of Pará is the third... Tipo: Info:eu-repo/semantics/article Palavras-chave: Species composition; Amazon; Diathoneura; Rhinoleucophenga. Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032017000100204 Diversity of small land mammals in a subtropical Atlantic forest in the western region of the state of Santa Catarina, southern Brazil Biota Neotropica Maestri,Renan; Galiano,Daniel; Kubiak,Bruno Busnello; Marinho,Jorge Reppold. Small land mammals possess features that significantly influence the dynamics of ecosystems and participate in various levels of the food web. In the Brazilian Atlantic Forest the richness of these animals is high, which makes them even more ecologically and numerically relevant in this environment. In this context, we investigated the species composition of small mammals in an unexplored area of southern Brazil, and compared the species composition of this area with other Atlantic Forest regions in order to understand how this community is related to others. The study area was located in an interior Atlantic forest formation, at a transition region between deciduous and Araucaria forests. Small mammals were captured at five collection points using pitfall... Tipo: Info:eu-repo/semantics/article Palavras-chave: Richness; Species composition; Uruguay River; Rodentia; Didelphimorphia. Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032014000400204 Medium and large mammals in a Cerrado fragment in Southeast Goiás, Brazil: inventory and immediate effects of habitat reduction on species richness and composition Biota Neotropica Rocha,Ednaldo Cândido; Silva,Jhefferson; Silva,Pablo Timóteo da; Araújo,Márcio da Silva; Castro,André Luis da Silva. Abstract: The reduction and fragmentation of remnant vegetation habitats has been one of the main threats to Cerrado biodiversity. The aim of the present study is to make an inventory of medium and large mammal species in a Cerrado remnant and to assess deforestation influence on part of this fragment on the richness and composition of mammal species. The study was conducted in a Cerrado fragment in southeast Goias State, Ipameri County. Data were collected during three different periods (P1, January-June, 2014; P2, December, 2016 - June, 2017; P3, July-December, 2017) through direct (visual, vocal and camera-trap records) and indirect methods (foot prints, animal burrows and other traces) in order to register the mammal species. Jackknife 1 estimator was... Tipo: Info:eu-repo/semantics/article Palavras-chave: Mammal fauna; Wildlife survey; Species composition; Fragmentation. Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032019000300309 Effect of Grazing Systems on Range Condition in Pabbi Hills Reserve Forest, Kharian, Punjab, Pakistan Chilean J. Agric. Res. Sajjad Haider,Muhammad; Maclaurin,Angus; Ali Chaudhry,Amjad; Mushtaque,Muhammad; Ullah,Sami. Grazing management of rangeland systems has not been well researched in Pakistan; grazing system the most sustainable is not known. In order to evaluate various grazing systems, a study was performed at Pabbi Hills Reserve Forest, Kharian, Punjab. Four simulated grazing treatments, viz. ungrazed control, continuous grazing, seasonal deferred grazing, and rotational deferred grazing, were tested in a randomized complete block design with four replicates. Response variables included species composition, fresh herbage yield, dry herbage yield of grasses and forbs, basal cover, and ground cover. Of the three grazing systems, the six-month seasonal deferred grazing system resulted in a marked increase in basal cover, but had no changes in relative species... Tipo: Journal article Palavras-chave: Sustainable rangeland system; Basal cover; Species composition; Herbage production; Ground cover; Six-month seasonal deferred grazing system. Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000400010 Variation in Native Bee Faunas and its Implications for Detecting Community Changes Ecology and Society Williams, Neal M; University of Calgary; nwilliam@ucalgary.ca; Minckley, Robert L; University of Utah; minckley@biology.utah.edu; Silveira, Fernando A; Universidade Federal de Minas Gerais; fernando@mono.icb.ufmg.br. Changes in flower-visiting insect populations or communities that result from human impacts can be documented by measuring spatial or temporal trends, or by comparing abundance or species composition before and after disturbance. The level of naturally occurring variation in populations and communities over space and time will dictate the sampling effort required to detect human-induced changes. We compiled a set of existing surveys of the bee faunas of natural communities from around the world to examine patterns of abundance and richness. We focused on a subset of these studies to illustrate variation in bee communities among different sites and within sites over different spatial and temporal scales. We used examples from our compilation and other... Tipo: Peer-Reviewed Reports Palavras-chave: Apiformes; Apoidea; Faunal surveys; Flower-visiting insects; Functional groups; Monitoring long-term changes; Sampling protocol; Solitary bees; Species composition; Species richness; Worldwide bee faunas. Ano: 2001 Resilience, Regime Shifts, and Guided Transition under Climate Change: Examining the Practical Difficulties of Managing Continually Changing Systems Ecology and Society Lin, Brenda B; CSIRO, Climate Adaptation Flagship; brenda.lin@csiro.au; Petersen, Brian; Michigan State University W.K. Kellogg Biological Station; petersenbri@gmail.com. Managing terrestrial systems has become increasingly difficult under climate change as unidirectional shifts in climate conditions challenge the resilience of ecosystems to maintain their compositional structure and function. Despite the increased attention of resilience management to guide transformational change, questions remain as to how to apply resilience to manage transitions. Rather than pushing systems across thresholds into alternative states, climate change may create a stepwise progression of unknown transitional states that track changing climate conditions. Because of this uncertainty, we must find ways to guide transitioning systems across climate boundaries towards states that are socially and environmentally desirable. We propose to ease... Tipo: Peer-Reviewed Insight Palavras-chave: Ecosystem function; Ecosystem structure; Resilience management; Species composition; Unidirectional shifts. Ano: 2013 Tendency and distribution indices for ordinal variables applied to Ellenberg indicator values Gayana Botánica Alvarez,Miguel; Mõseler,Bodo Maria; San Martín,Cristina. The use of mean value for the analysis of Ellenberg indicator values in plots or plant community types has been criticised by several authors. On the other hand, little attention has been paid to distribution patterns of the respective classes frequencies. Herewith we make a revision of metrics available for the characterization of tendency and distribution patterns of ordinal variables, like in the case of Ellenberg indicator values, and discuss their relation to frequency histogram shapes. We selected three tendencies (mean value, median value and mode) and two distribution metrics (position index and relative dominance). Additionally, we proposed a concentration index, which is analogous to the contagion index commonly used by landscape ecologists.... Tipo: Journal article Palavras-chave: Bio-indicators; Ecological monitoring; Grassland vegetation; Species composition. Ano: 2013 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432013000200006 Сезонная изменчивость количественного развития фитопланктона у Аргентинских островов (Антарктика). IBSS Repository Кузьменко, Л. В.; Игнатьев, С. М.. Приводятся результаты исследования количественного развития фитопланктона для прибрежных вод Аргентинского архипелага. Материалы собраны в 7-й УАЭ (зимовка 2002 – 2003 гг.) и 10-й УАЭ (сезонные работы 2005 г.). Впервые получены сведения о сезонной динамике количественного развития, видовом разнообразии фитопланктона, выделены доминирующие виды, сроки их массовой вегетации и стадии сукцессии. В водах архипелага обнаружено 126 видов и разновидностей микроводорослей, 73% из которых – диатомовые, 16,6 % - динофитовые. Исследования, проведённые антарктической осенью 2005 г., дополнили список видов на 31 таксон. Наиболее высокие показатели обилия фитопланктона получены для весенне-летнего сезона, когда в октябре наблюдалось «цветение» воды, вызванное мелкими... Tipo: Journal Contribution Palavras-chave: Фитопланктон; Численность; Биомасса; Видовой состав; Аргентинские о-ва; Антарктика; Phytoplankton; Abundance; Biomass; Species composition; Argentine Islands; Antarctic; Фітопланктон; Чисельність; Біомаса; Видовий склад; Аргентинські о-ви. Ano: 2007 URL: http://repository.ibss.org.ua/dspace/handle/99011/847 Распределение зоопланктона в западном секторе Чёрного моря в октябре 2005 г. IBSS Repository Аннинский, Б. Е.; Тимофте, Ф.. Проанализировано распределение и обилие массовых видов макро- и мезопланктона в западной части Чёрного моря в октябре 2005 г. Среди желетелого макропланктона Aurelia aurita и Beroe ovata преобладали по биомассе в шельфовых районах моря (528 и 15 г м-2, соответственно), а Mnemiopsis leidyi и Pleurobrachia pileus – на глубинных станциях (76 и 22 г м-2, соответственно). Суммарная биомасса мезопланктона в зоне шельфа составляла в среднем 5.75 ± 1.35 г м-2, в районе континентального склона – 10.47 ± 4.19 г м-2, в глубинной части моря – 10.01 ± 4.70 г м-2. При исключении из расчётов сагитты и ночесветки биомасса мезопланктона возрастала в направлении от шельфа (3.99 ± 0.91 г м-2) к открытому морю (8.72 ± 1.25 г м-2). Показано, что основной причиной... Tipo: Journal Contribution Palavras-chave: Желетелый макропланктон; Мезопланктон; Гребневики-вселенцы; Видовой состав; Горизонтальное распределение; Многолетняя динамика биомассы; Чёрное море; Gelatinous macroplankton; Mesoplankton; Alien ctenophore; Species composition; Spatial distribution; Interannual dynamics of biomass; Black Sea; Реброплави-хижаки; Чoрне море. Ano: 2009 URL: http://repository.ibss.org.ua/dspace/handle/99011/838 Stability of the relationships among demersal fish assemblages and environmental-trawling drivers at large spatio-temporal scales in the northern Mediterranean Sea ArchiMer Mérigot, Bastien; Gaertner, Jean-claude; Brind’amour, Anik; Carbonara, Pierluigi; Esteban, Antonio; Garcia-ruiz, Cristina; Gristina, Michele; Imzilen, Taha; Jadaud, Angelique; Joksimovic, Aleksandar; Kavadas, Stefanos; Kolitari, Jerina; Maina, Irida; Maiorano, Porzia; Manfredi, Chiara; Micallef, Reno; Peristeraki, Panagiota; Relini, Giulio; Sbrana, Mario; Spedicato, Maria Teresa; Thasitis, Ioannis; Vittori, Stefania; Vrgoc, Nedo. Trawling pressure and environmental changes may affect the composition of fish assemblages. Our knowledge on large spatio-temporal patterns of demersal fish composition remains incomplete for the Mediterranean Sea. We investigated (1) the spatio-temporal stability of demersal assemblages, (2) the relationships between these assemblages and potential structuring factors (trawling pressure and environmental conditions) in order to assess the dynamic of the assemblage structure at the scale of the northern Mediterranean Sea. We analysed a dataset of 18062 hauls from 10 to 800 m depth performed annually during the last two decades across 17 Geographical Sub-Areas (GSAs) (MEDITS program). A multi-table analysis (STATICO-CoA) evidenced a strong inter-GSAs... Tipo: Text Palavras-chave: Species composition; Stability; Demersal assemblages; Environment; Fishing pressure; Large scale; Co-inertia analysis; STATICO-CoA. Ano: 2019 URL: https://archimer.ifremer.fr/doc/00584/69629/67485.pdf Spatio-temporal structure of the epipelic diatom assemblage from an intertidal mudflat in Marennes-Oleron Bay, France ArchiMer Haubois, Anne-gaelle; Sylvestre, F; Guarini, Jean-marc; Richard, Pierre; Blanchard, G. Spatio-temporal changes in taxonomic composition and structure of an epipelic diatom assemblage from an intertidal mudflat on the French Atlantic coast was studied over an annual cycle along a cross-shore transect. The assemblage structure was described by estimating both relative abundance and contribution to biovolume of each species. Results showed that the assemblage was numerically dominated by small-sized species (mean relative abundance of 91%). Large species, however, significantly contributed to the total biovolume (mean contribution to biovolume of 49%). A factorial correspondence analysis indicated that the epipelic assemblage was relatively homogeneous along the cross-shore transect but emphasized the seasonal succession of diatom species. In... Tipo: Text Palavras-chave: Cell volume; Assemblage structure; Species composition; Epipelic diatoms; Intertidal mudflat. Ano: 2005 URL: http://archimer.ifremer.fr/doc/2005/publication-3702.pdf Registros recuperados: 37 Primeira ... 1 2 ... Última

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