Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 9
Primeira ... 1 ... Última
Imagem não selecionada

Imprime registro no formato completo
Building functional groups of marine benthic macroinvertebrates on the basis of general community assembly mechanisms ArchiMer
Alexandridis, Nikolaos; Bacher, Cedric; Desroy, Nicolas; Jean, Fred.
The accurate reproduction of the spatial and temporal dynamics of marine benthic biodiversity requires the development of mechanistic models, based on the processes that shape macroinvertebrate communities. The modelled entities should, accordingly, be able to adequately represent the many functional roles that are performed by benthic organisms. With this goal in mind, we applied the emergent group hypothesis (EGH), which assumes functional equivalence within and functional divergence between groups of species. The first step of the grouping involved the selection of 14 biological traits that describe the role of benthic macroinvertebrates in 7 important community assembly mechanisms. A matrix of trait values for the 240 species that occurred in the Rance...
Tipo: Text Palavras-chave: Assembly mechanisms; Benthic communities; Biological traits; Emergent groups; Functional diversity; Functional redundancy.
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00369/47975/48000.pdf
Imagem não selecionada

Imprime registro no formato completo
Depth-related diversity patterns of free-living nematode assemblages on two tropical rocky shores OceanDocs
Armenteros, Maickel; del Pino-Machado, Arturo; González-González, Susett; Ruiz-Abierno, Alexei; Pérez-García, José Andrés.
Depth-related spatial patterns of diversity have been described for free-living nematode assemblages at four depth horizons (intertidal, 1 m, 5 m and 10 m) at two subtidal rocky shores on the NW coast of Cuba: Bacunayagua and Miramar. The patterns were described based on species identity and biological traits. Species richness was similar across depth horizons ranging from 12 to 18 species; it was also similar between sites with 30 and 33 species for Bacunayagua and Miramar respectively. Diversity variation was higher between the intertidal and the subtidal horizons suggesting that microhabitat plays a key role. Depth was not an important driver of the diversity of nematodes on the studied rocky shores both in terms of species richness and diversity...
Tipo: Journal Contribution Palavras-chave: Α-diversity; Β-diversity; Biological traits; Nematodes; Species composition.
Ano: 2014 URL: http://hdl.handle.net/1834/5916
Imagem não selecionada

Imprime registro no formato completo
Effet d’une espèce ingénieur sur la diversité et le fonctionnement des communautés benthiques : l’habitat récifal à Sabellaria alveolata ArchiMer
Jones, Auriane.
Coastal zones worldwide are home to a large diversity of ecosystem engineers that perform key functions such as the recycling of organic matter and nutrients. The habitats resulting from the biological activity of these species are exposed to numerous disturbances such as over harvesting and trampling or via coastal modification. In this context, it is becoming key to understand the functioning of these engineered habitats and how they are affected by increasing disturbances. During my PhD, I used the reef habitat built by the gregarious tubiculous polychaete Sabellaria alveolata as a study case. First, the environmental and biotic changes associated with the establishment of a S. alveolata reef and its increasing disturbance were assessed, focusing on...
Tipo: Text Palavras-chave: Ingénieur de l’écosystème; Habitat récifal; Macrofaune benthique; Diversité fonctionnelle et isotopique; Production primaire benthique; Réseau trophique; Flux biogéochimiques; Traits biologiques; Ecosystem engineer; Reef habitat; Benthic macrofauna; Functional and isotopic diversity; Facilitation; Benthic primary production; Food web; Biogeochemical fluxes; Isoscape; Biological traits.
Ano: 2017 URL: https://archimer.ifremer.fr/doc/00498/60960/64363.pdf
Imagem não selecionada

Imprime registro no formato completo
Growth and age estimation of the greater forkbeard, Phycis blennoides (Actinopterygii: Gadiformes: Phycidae), from the Gulf of Tunis (central Mediterranean) ArchiMer
Romdhani, Ahlem; Ktari, Mohamed-hedi; Dufour, Jean-louis; Mahe, Kelig; Francour, Patrice.
Background. The greater forkbeard, Phycis blennoides (Brünnich, 1768), is a gadiform species, which has economical value and its population is dwelling in a 60–800 m depth range throughout the Atlantic and the Mediterranean. Along African north coast, there is a lack of information about the biology (age, growth, sex-ratio) of this species. This study provides the first data on population parameters of P. blennoides in Tunisia. Materials and Methods. Specimens of Phycis blennoides were collected from the landings of the artisanal fisheries between September 2007 and June 2010. The length–weight relations were determined according to the allometric equation: W = aTLb. Growth parameters were estimated using the von Bertalanffy growth equation. Results....
Tipo: Text Palavras-chave: Otolith; Biological traits; Length-weight relation; Von Bertalanffy growth function.
Ano: 2016 URL: https://archimer.ifremer.fr/doc/00324/43532/43077.pdf
Imagem não selecionada

Imprime registro no formato completo
Individual-based simulation of the spatial and temporal dynamics of macroinvertebrate functional groups provides insights into benthic community assembly mechanisms ArchiMer
Alexandridis, Nikolaos; Bacher, Cedric; Desroy, Nicolas; Jean, Fred.
The complexity and scales of the processes that shape communities of marine benthic macroinvertebrates has limited our understanding of their assembly mechanisms and the potential to make projections of their spatial and temporal dynamics. Individual-based models can shed light on community assembly mechanisms, by allowing observed spatiotemporal patterns to emerge from first principles about the modeled organisms. Previous work in the Rance estuary (Brittany, France) revealed the principal functional components of its benthic macroinvertebrate communities and derived a set of functional relationships between them. These elements were combined here for the development of a dynamic and spatially explicit model that operates at two spatial scales. At the...
Tipo: Text Palavras-chave: Individual-based model; Inter-scale modeling; Functional groups; Benthic macroinvertebrates; Community assembly; Biological traits; Biotic interactions; Alpha-diversity; Beta-diversity; Rance estuary.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00445/55654/57319.pdf
Imagem não selecionada

Imprime registro no formato completo
Models of general community assembly mechanisms simulating the spatial and temporal dynamics of benthic biodiversity ArchiMer
Alexandridis, Nikolaos.
Benthic macroinvertebrates are part of a complex network of interactions. The spatial and temporal scales of the processes that form the basis for these interactions have traditionally restricted their empirical investigation. The first chapter of the manuscript attempts a review of the modelling tools that have been employed for the study of the marine benthos. The implementation of a mechanistic modelling framework seems fitting, but it requires the derivation of a few model entities with a clear functional role. The second chapter of the manuscript employs the emergent group hypothesis to do that in a way that is objective and testable. The resulting grouping is tested against theoretical expectations and the results support its ability to represent...
Tipo: Text Palavras-chave: Assemblage des communautés; Estuaire de la Rance; Groupes fonctionnels; Macrofaune benthique; Modélisation de la biodiversité; Modélisation orientée agent; Modélisation qualitative; Trade-offs fonctionnels; Traits biologiques; Agent-based modelling; Benthic macrofauna; Biodiversity model; Biological traits; Community assembly; Functional groups; Functional trade-offs; Qualitative modelling; Rance estuary.
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00383/49481/49972.pdf
Imagem não selecionada

Imprime registro no formato completo
Otolith growth and age estimation of bastard grunt, Pomadasys incisus (Actinopterygii: Perciformes: Haemulidae), in the Gulf of Tunis (Central Mediterranean). ArchiMer
Chater, Ines; Romdhani, Ahlem; Dufour, Jean-louis; Mahe, Kelig; Francour, Patrice; Chakroun-marzouk, Nadia.
Background. Bastard grunt, Pomadasys incisus (Bowdich, 1825), is reported as a well-established species in the Mediterranean Sea. Although bastard grunt has rapidly expanded its area of distribution in the Mediterranean, there is no information about its age and growth. The aim of this study was to provide data about growth, condition, and first sexual maturity of the species in order to contribute to a better management of its fishery. Materials and methods. A total of 515 specimens of bastard grunt were caught in the Gulf of Tunis. The age was determined from otoliths. Length–weight relation, von Bertalanffy equation, and growth rate were employed to evaluate the fish growth. Also the condition factor and length at first sexual maturity were calculated....
Tipo: Text Palavras-chave: Sagittal otoliths; Biological traits; Von Bertalanffy growth function; Length-weight relation; Pomadasys incisus.
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00259/37006/35502.pdf
Imagem não selecionada

Imprime registro no formato completo
Qualitative modelling of functional relationships in marine benthic communities ArchiMer
Alexandridis, Nikolaos; Dambacher, Jeffrey M.; Jean, Fred; Desroy, Nicolas; Bacher, Cedric.
In order to better understand and predict the dynamics of benthic macroinvertebrate communities, we need to first define the functional components of benthic biodiversity and then provide a mechanistic description of how they interact with their abiotic environment, their basic resources and each other. These interactions should be largely controlled by readily available biological traits, making trait-based modelling an ideal framework for the synthesis of relevant hypotheses from ecological theory and expert knowledge. With the help of benthic species traits, we derived a set of first principles regarding the role of organisms in processes of environmental filtering, consumption of algae/detritus, predation, use of space, biogenic habitat modification...
Tipo: Text Palavras-chave: Benthic macroinvertebrates; Biological traits; Biotic interactions; Community assembly; Functional groups; Qualitative modelling.
Ano: 2017 URL: http://archimer.ifremer.fr/doc/00394/50587/51411.pdf
Imagem não selecionada

Imprime registro no formato completo
Towards a framework for the quantitative assessment of trawling impact on the seabed and benthic ecosystem ArchiMer
Rijnsdorp, A. D.; Bastardie, F.; Bolam, S. G.; Buhl-mortensen, L.; Eigaard, O. R.; Hamon, Katell; Hiddink, J. G.; Hintzen, N. T.; Ivanovic, A.; Kenny, A.; Laffargue, Pascal; Nielsen, J. R.; O'Neill, F. G.; Piet, G. J.; Polet, H.; Sala, A.; Smith, C.; Van Denderen, P. D.; Van Kooten, T.; Zengin, M..
A framework to assess the impact of mobile fishing gear on the seabed and benthic ecosystem is presented. The framework that can be used at regional and local scales provides indicators for both trawling pressure and ecological impact. It builds on high-resolution maps of trawling intensity and considers the physical effects of trawl gears on the seabed, on marine taxa, and on the functioning of the benthic ecosystem. Within the framework, a reductionist approach is applied that breaks down a fishing gear into its components, and a number of biological traits are chosen to determine either the vulnerability of the benthos to the impact of that gear component, or to provide a proxy for their ecological role. The approach considers gear elements, such as...
Tipo: Text Palavras-chave: Benthos; Biological traits; Good environmental status; Indicators; Method; Mobile gear; Physical impacts.
Ano: 2016 URL: http://archimer.ifremer.fr/doc/00310/42136/44229.pdf
Registros recuperados: 9
Primeira ... 1 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional