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| Registros recuperados: 10 | |
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| Ritt, Benedicte; Desbruyeres, Daniel; Caprais, Jean-claude; Gauthier, Olivier; Ruffine, Livio; Buscail, Roselyne; Olu-le Roy, Karine; Sarrazin, Jozee. |
| The Mediterranean Sea constitutes a unique environment to study cold-seep ecosystems due to the presence of different geodynamic settings, from an active margin along the Mediterranean Ridge (MR) to a passive margin in the Nile Deep-Sea Fan (NDSF). We attempted to identify the structure of benthic communities associated with the Napoli and Amsterdam mud volcanoes (MVs) located on the MR and to establish the links between faunal distribution and environmental conditions at different spatial scales. Comparison between the 2 MVs revealed that the faunal distribution seemed to be mainly controlled by the characteristics of the microhabitats. On both geological structures, the variability between the different microhabitats was higher than the variability... |
| Tipo: Text |
Palavras-chave: Mediterranean Ridge; Cold seeps; Benthic fauna; Environmental conditions; Diversity indices; Microhabitats. |
| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00106/21725/19292.pdf |
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| Merigot, B; Bertrand, Jacques; Gaertner, J; Durbec, J; Mazouni, N; Mante, C. |
| The multi-component aspect of species diversity of groundfish assemblages was examined on the basis of a set of experimental trawl surveys conducted on the east coast of Corsica. We analysed and compared the structuration of diversity within three different bathymetric strata: the continental shelf (60-120 m depth), the upper slope (250-400 m) and the lower slope (450-570 m). For each of these three bathymetric strata, we simultaneously analysed 12 indices that are theoretically complementary and relate to 4 diversity components: (1) the number of species, (2) rarity, (3) evenness and (4) taxonomic diversity. Principal component analysis based on Spearman's correlation coefficients was carried out to investigate empirical relationships between the selected... |
| Tipo: Text |
Palavras-chave: Mediterranean Sea; Corsica; Taxonomic relatedness; Bathymetry; Diversity indices; Demersal fish. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-3512.pdf |
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| Loiseau, Nicolas; Gaertner, Jean-claude. |
| We present the first representative and quantified overview of the indices used worldwide for assessing the biodiversity of coral reef fishes. On this basis, we discuss the suitability and drawbacks of the indices most widely used in the assessment of coral fish biodiversity. An extensive and systematic survey of the literature focused on coral reef fish biodiversity was conducted from 1990 up to the present. We found that the multicomponent aspect of biodiversity, which is considered as a key feature of biodiversity for numerous terrestrial and marine ecosystems, has been poorly taken into account in coral reef fish studies. Species richness is still strongly dominant while other diversity components, such as functional diversity, are underestimated even... |
| Tipo: Text |
Palavras-chave: Coral reef fishes; Diversity indices; Monitoring; Multicomponent; Review. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00286/39686/80168.pdf |
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| Oliveira, Altamir Fernandes de; Alves Pereira, José Aldo; Coelho, Silvério José; Assis Pereira, Gabriel de. |
| This work aimed to present a partial diagnosis of street tree under power grid in five cities in the West Region of Minas Gerais, which had more power outages because of conflicts with trees. We identified 186 trees, belonging to 17 species of exotic origin and 30 species of native origin. The most frequent species were Poincianella pluviosa (30.43%), Ligustrum lucidum (10.86%), Michelia champaca (6.52%) and Schinus molle (4.89%), which together amounted to 52.7% of the assessed trees. Most trees (84.78%) were located in streets wider than 7 m, and 36.55% of the trees were planted in sidewalks with a minimum of 2 m wide. Those trees present ther first bifurcation at over 1.80 m above ground level. The pruning performed due to conflicts with the grid... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Tree; Electrical wiring; Public administration; Diversity indices; Pruning Árvore; Fiação elétrica; Gestão pública; Índices de diversidade; Poda. |
| Ano: 2016 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/749 |
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| Buckup,Ludwig; Bueno,Alessandra A. P.; Bond-Buckup,Georgina; Casagrande,Marcelo; Majolo,Fabiane. |
| Benthic macroinvertebrate in four rivers, three in the Pelotas River basin (Divisa, Marco and Silveira rivers, in the headwaters of the Uruguai River) and one in the Taquari-Antas system (Antas River), a tributary in the Guaíba basin, in the state of Rio Grande do Sul, were identified. Two samples were collected in summer, autumn and spring, with one replicate in each river. The total of 28,961 specimens included members of Platyhelminthes, Annelida, Acarina, Insecta, Crustacea and Mollusca. The Silveira and Marco rivers showed significant differences in the indices of Shannon-Weaver (H), Simpsons Reciprocal (1/D), Margalef (DMg) and Equitability (E). The Silveira River showed the highest means of diversity and the EPT index (Ephemeroptera, Plecoptera,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aquatic invertebrates; Community structure; Diversity indices; Rio Grande do Sul. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752007000200005 |
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| Costa,Leonardo Emanuel de Oliveira; Queiroz,Marisa Vieira de; Borges,Arnaldo Chaer; Moraes,Celia Alencar de; Araújo,Elza Fernandes de. |
| The common bean is one of the most important legumes in the human diet, but little is known about the endophytic bacteria associated with the leaves of this plant. The objective of this study was to characterize the culturable endophytic bacteria of common bean (Phaseolus vulgaris. leaves from three different cultivars (Vermelhinho, Talismã, and Ouro Negro) grown under the same field conditions. The density of endophytic populations varied from 4.5 x 10² to 2.8 x 10³ CFU g-1 of fresh weight. Of the 158 total isolates, 36.7% belonged to the Proteobacteria, 32.9% to Firmicutes, 29.7% to Actinobacteria, and 0.6% to Bacteroidetes. The three P. vulgaris cultivars showed class distribution differences among Actinobacteria, Alphaproteobacteria and Bacilli. Based... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Endophytic bacteria; Common bean; Phaseolus vulgaris; 16S rDNA; Diversity indices. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000400041 |
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| Registros recuperados: 10 | |
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