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| Registros recuperados: 44 | |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| 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 |
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| Registros recuperados: 44 | |
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