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Filipe Ferreira De ,deus - One of the best experts on this subject based on the ideXlab platform.
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Sucessão, composição florística e biologia da polinização de uma comunidade vegetal do cerrado, Uberlândia, Minas Gerais
Universidade Federal de Uberlândia, 2014Co-Authors: Filipe Ferreira De ,deusAbstract:A sucessão é tida como um processo ecológico que resulta na modificação do ambiente pela comunidade biológica culminando em um tipo de ecossistema persistente. O fogo é considerado um dos principais fatores na sucessão de áreas de cerrado disclímax determinando a dinâmica e a composição da vegetação. No entanto, quando savanas são protegidas contra incêndios, tanto espécies tolerantes ao fogo quanto aquelas sensíveis ao fogo aumentam em densidade e tamanho individual, especialmente as espécies arbóreas. O objetivo do estudo foi verificar mudanças ocorridas na composição florística, biologia floral, aspectos da polinização e oferta de néctar em uma área de campo sujo, protegida contra o fogo durante 20 anos, na Estação Ecológica do Panga, Uberlândia, Minas Gerais. Observou-se o aumento de 50 espécies de 1992 para 2012 e o desenvolvimento de espécies arbóreas e sistemas especializados de polinização. Esse aumento de diversidade/ riqueza tem sido visto como um fator importante na redução da variabilidade das densidades de populações de polinizadores ao longo do tempo. O que indica uma maior estabilidade da comunidade de polinizadores, aumentando a redundância funcional, para que potenciais extinções possam ser compensadas. Além da riqueza de espécies, a abundância de flores é outro fator importante na estruturação das comunidades de polinizadores. Visto que quanto maior a diversidade de espécies vegetais, maior a abundância de recursos florais e maior a disponibilidade de alimento para esses animais, aumentando estabilidade temporal na oferta desses recursos.The succession is seen as an ecological process that results in environmental changes driven by the biological community culminating in a persistent type of ecosystem. The fire is considered a major factor in the succession of disclímax cerrado areas determining the dynamics and composition of the vegetation. However, when savannas are protected from fire both tolerant and sensitive Species increase in density and size, specially the tree Species. The aim of the study was to determine changes in the floristic composition, floral biology, aspects of pollination, and nectar supply in a campo sujo area protected against fire for 20 years at Estação Ecológica do Panga, Uberlândia, Minas Gerais. There was an increase in Specie Richness of 50 Species since 1992 to 2012 and the development of trees and Species with specialized pollination. This increase in Species Richness has been seen as an important factor in reducing the variability of pollinator s population density over time. This indicates a greater stability of the pollinator community, improving functional redundancy, so that can potentially compensate extinctions. Besides the Species Richness, abundance of flowers is another important factor in structuring communities of pollinators. Hence, the greater plant diversity, the greater the floral abundance and availability of food for these animals, increasing temporal stability in resources supply
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Sucessão, composição florística e biologia da polinização de uma comunidade vegetal do cerrado, Uberlândia, Minas Gerais
'EDUFU - Editora da Universidade Federal de Uberlandia', 2014Co-Authors: Filipe Ferreira De ,deusAbstract:The succession is seen as an ecological process that results in environmental changes driven by the biological community culminating in a persistent type of ecosystem. The fire is considered a major factor in the succession of disclímax cerrado areas determining the dynamics and composition of the vegetation. However, when savannas are protected from fire both tolerant and sensitive Species increase in density and size, specially the tree Species. The aim of the study was to determine changes in the floristic composition, floral biology, aspects of pollination, and nectar supply in a campo sujo area protected against fire for 20 years at Estação Ecológica do Panga, Uberlândia, Minas Gerais. There was an increase in Specie Richness of 50 Species since 1992 to 2012 and the development of trees and Species with specialized pollination. This increase in Species Richness has been seen as an important factor in reducing the variability of pollinator s population density over time. This indicates a greater stability of the pollinator community, improving functional redundancy, so that can potentially compensate extinctions. Besides the Species Richness, abundance of flowers is another important factor in structuring communities of pollinators. Hence, the greater plant diversity, the greater the floral abundance and availability of food for these animals, increasing temporal stability in resources supply.Fundação de Amparo a Pesquisa do Estado de Minas GeraisMestre em Ecologia e Conservação de Recursos NaturaisA sucessão é tida como um processo ecológico que resulta na modificação do ambiente pela comunidade biológica culminando em um tipo de ecossistema persistente. O fogo é considerado um dos principais fatores na sucessão de áreas de cerrado disclímax determinando a dinâmica e a composição da vegetação. No entanto, quando savanas são protegidas contra incêndios, tanto espécies tolerantes ao fogo quanto aquelas sensíveis ao fogo aumentam em densidade e tamanho individual, especialmente as espécies arbóreas. O objetivo do estudo foi verificar mudanças ocorridas na composição florística, biologia floral, aspectos da polinização e oferta de néctar em uma área de campo sujo, protegida contra o fogo durante 20 anos, na Estação Ecológica do Panga, Uberlândia, Minas Gerais. Observou-se o aumento de 50 espécies de 1992 para 2012 e o desenvolvimento de espécies arbóreas e sistemas especializados de polinização. Esse aumento de diversidade/ riqueza tem sido visto como um fator importante na redução da variabilidade das densidades de populações de polinizadores ao longo do tempo. O que indica uma maior estabilidade da comunidade de polinizadores, aumentando a redundância funcional, para que potenciais extinções possam ser compensadas. Além da riqueza de espécies, a abundância de flores é outro fator importante na estruturação das comunidades de polinizadores. Visto que quanto maior a diversidade de espécies vegetais, maior a abundância de recursos florais e maior a disponibilidade de alimento para esses animais, aumentando estabilidade temporal na oferta desses recursos
Didier Debroas - One of the best experts on this subject based on the ideXlab platform.
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Assessing the diversity and specificity of two freshwater viral communities through metagenomics.
PLoS ONE, 2012Co-Authors: Simon Roux, François Enault, Agnès Robin, Viviane Ravet, Sébastien Personnic, Sébastien Theil, Jonathan Colombet, Télesphore Sime-ngando, Didier DebroasAbstract:Transitions between saline and fresh waters have been shown to be infrequent for microorganisms. Based on host-specific interactions, the presence of specific clades among hosts suggests the existence of freshwater-specific viral clades. Yet, little is known about the composition and diversity of the temperate freshwater viral communities, and even if freshwater lakes and marine waters harbor distinct clades for particular viral sub-families, this distinction remains to be demonstrated on a community scale.To help identify the characteristics and potential specificities of freshwater viral communities, such communities from two lakes differing by their ecological parameters were studied through metagenomics. Both the cluster Richness and the Species Richness of the Lake Bourget virome were significantly higher that those of the Lake Pavin, highlighting a trend similar to the one observed for microorganisms (i.e. the Specie Richness observed in mesotrophic lakes is greater than the one observed in oligotrophic lakes). Using 29 previously published viromes, the cluster Richness was shown to vary between different environment types and appeared significantly higher in marine ecosystems than in other biomes. Furthermore, significant genetic similarity between viral communities of related environments was highlighted as freshwater, marine and hypersaline environments were separated from each other despite the vast geographical distances between sample locations within each of these biomes. An automated phylogeny procedure was then applied to marker genes of the major families of single-stranded (Microviridae, Circoviridae, Nanoviridae) and double-stranded (Caudovirales) DNA viruses. These phylogenetic analyses all spotlighted a very broad diversity and previously unknown clades undetectable by PCR analysis, clades that gathered sequences from the two lakes. Thus, the two freshwater viromes appear closely related, despite the significant ecological differences between the two lakes. Furthermore, freshwater viral communities appear genetically distinct from other aquatic ecosystems, demonstrating the specificity of freshwater viruses at a community scale for the first time.
Simon Roux - One of the best experts on this subject based on the ideXlab platform.
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Assessing the Diversity and Specificity of Two Freshwater Viral Communities through Metagenomics
2013Co-Authors: Simon Roux, François Enault, Agnès Robin, Viviane Ravet, Sébastien PersonnicAbstract:Transitions between saline and fresh waters have been shown to be infrequent for microorganisms. Based on host-specific interactions, the presence of specific clades among hosts suggests the existence of freshwater-specific viral clades. Yet, little is known about the composition and diversity of the temperate freshwater viral communities, and even if freshwater lakes and marine waters harbor distinct clades for particular viral sub-families, this distinction remains to be demonstrated on a community scale. To help identify the characteristics and potential specificities of freshwater viral communities, such communities from two lakes differing by their ecological parameters were studied through metagenomics. Both the cluster Richness and the Species Richness of the Lake Bourget virome were significantly higher that those of the Lake Pavin, highlighting a trend similar to the one observed for microorganisms (i.e. the Specie Richness observed in mesotrophic lakes is greater than the one observed in oligotrophic lakes). Using 29 previously published viromes, the cluster Richness was shown to vary between different environment types and appeared significantly higher in marine ecosystems than in other biomes. Furthermore, significant genetic similarity between viral communities of related environments was highlighted as freshwater, marine and hypersaline environments were separated from each other despite the vast geographical distances between sample locations within each of these biomes. An automated phylogeny procedure was then applied to marker genes of the major families of single-stranded (Microviridae, Circoviridae, Nanoviridae) and double-stranded (Caudovirales) DNA viruses. These phylogeneti
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Assessing the Diversity and specificity of two freshwater Viral Communities through Metagenomics. PLoS ONE 7:e33641. doi: 10.1371/journal.pone.0033641
2012Co-Authors: Simon Roux, François Enault, Viviane RavetAbstract:Transitions between saline and fresh waters have been shown to be infrequent for microorganisms. Based on host-specific interactions, the presence of specific clades among hosts suggests the existence of freshwater-specific viral clades. Yet, little is known about the composition and diversity of the temperate freshwater viral communities, and even if freshwater lakes and marine waters harbor distinct clades for particular viral sub-families, this distinction remains to be demonstrated on a community scale. To help identify the characteristics and potential specificities of freshwater viral communities, such communities from two lakes differing by their ecological parameters were studied through metagenomics. Both the cluster Richness and the Species Richness of the Lake Bourget virome were significantly higher that those of the Lake Pavin, highlighting a trend similar to the one observed for microorganisms (i.e. the Specie Richness observed in mesotrophic lakes is greater than the one observed in oligotrophic lakes). Using 29 previously published viromes, the cluster Richness was shown to vary between different environment types and appeared significantly higher in marine ecosystems than in other biomes. Furthermore, significant genetic similarity between viral communities of related environments was highlighted as freshwater, marine and hypersaline environments were separated from each other despite the vast geographical distances between sample locations within each of these biomes. An automated phylogeny procedure was then applied to marker genes of the major families of single-stranded (Microviridae, Circoviridae, Nanoviridae) and double-stranded (Caudovirales) DNA viruses. These phylogeneti
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Assessing the diversity and specificity of two freshwater viral communities through metagenomics.
PLoS ONE, 2012Co-Authors: Simon Roux, François Enault, Agnès Robin, Viviane Ravet, Sébastien Personnic, Sébastien Theil, Jonathan Colombet, Télesphore Sime-ngando, Didier DebroasAbstract:Transitions between saline and fresh waters have been shown to be infrequent for microorganisms. Based on host-specific interactions, the presence of specific clades among hosts suggests the existence of freshwater-specific viral clades. Yet, little is known about the composition and diversity of the temperate freshwater viral communities, and even if freshwater lakes and marine waters harbor distinct clades for particular viral sub-families, this distinction remains to be demonstrated on a community scale.To help identify the characteristics and potential specificities of freshwater viral communities, such communities from two lakes differing by their ecological parameters were studied through metagenomics. Both the cluster Richness and the Species Richness of the Lake Bourget virome were significantly higher that those of the Lake Pavin, highlighting a trend similar to the one observed for microorganisms (i.e. the Specie Richness observed in mesotrophic lakes is greater than the one observed in oligotrophic lakes). Using 29 previously published viromes, the cluster Richness was shown to vary between different environment types and appeared significantly higher in marine ecosystems than in other biomes. Furthermore, significant genetic similarity between viral communities of related environments was highlighted as freshwater, marine and hypersaline environments were separated from each other despite the vast geographical distances between sample locations within each of these biomes. An automated phylogeny procedure was then applied to marker genes of the major families of single-stranded (Microviridae, Circoviridae, Nanoviridae) and double-stranded (Caudovirales) DNA viruses. These phylogenetic analyses all spotlighted a very broad diversity and previously unknown clades undetectable by PCR analysis, clades that gathered sequences from the two lakes. Thus, the two freshwater viromes appear closely related, despite the significant ecological differences between the two lakes. Furthermore, freshwater viral communities appear genetically distinct from other aquatic ecosystems, demonstrating the specificity of freshwater viruses at a community scale for the first time.
Viviane Ravet - One of the best experts on this subject based on the ideXlab platform.
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Assessing the Diversity and Specificity of Two Freshwater Viral Communities through Metagenomics
2013Co-Authors: Simon Roux, François Enault, Agnès Robin, Viviane Ravet, Sébastien PersonnicAbstract:Transitions between saline and fresh waters have been shown to be infrequent for microorganisms. Based on host-specific interactions, the presence of specific clades among hosts suggests the existence of freshwater-specific viral clades. Yet, little is known about the composition and diversity of the temperate freshwater viral communities, and even if freshwater lakes and marine waters harbor distinct clades for particular viral sub-families, this distinction remains to be demonstrated on a community scale. To help identify the characteristics and potential specificities of freshwater viral communities, such communities from two lakes differing by their ecological parameters were studied through metagenomics. Both the cluster Richness and the Species Richness of the Lake Bourget virome were significantly higher that those of the Lake Pavin, highlighting a trend similar to the one observed for microorganisms (i.e. the Specie Richness observed in mesotrophic lakes is greater than the one observed in oligotrophic lakes). Using 29 previously published viromes, the cluster Richness was shown to vary between different environment types and appeared significantly higher in marine ecosystems than in other biomes. Furthermore, significant genetic similarity between viral communities of related environments was highlighted as freshwater, marine and hypersaline environments were separated from each other despite the vast geographical distances between sample locations within each of these biomes. An automated phylogeny procedure was then applied to marker genes of the major families of single-stranded (Microviridae, Circoviridae, Nanoviridae) and double-stranded (Caudovirales) DNA viruses. These phylogeneti
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Assessing the Diversity and specificity of two freshwater Viral Communities through Metagenomics. PLoS ONE 7:e33641. doi: 10.1371/journal.pone.0033641
2012Co-Authors: Simon Roux, François Enault, Viviane RavetAbstract:Transitions between saline and fresh waters have been shown to be infrequent for microorganisms. Based on host-specific interactions, the presence of specific clades among hosts suggests the existence of freshwater-specific viral clades. Yet, little is known about the composition and diversity of the temperate freshwater viral communities, and even if freshwater lakes and marine waters harbor distinct clades for particular viral sub-families, this distinction remains to be demonstrated on a community scale. To help identify the characteristics and potential specificities of freshwater viral communities, such communities from two lakes differing by their ecological parameters were studied through metagenomics. Both the cluster Richness and the Species Richness of the Lake Bourget virome were significantly higher that those of the Lake Pavin, highlighting a trend similar to the one observed for microorganisms (i.e. the Specie Richness observed in mesotrophic lakes is greater than the one observed in oligotrophic lakes). Using 29 previously published viromes, the cluster Richness was shown to vary between different environment types and appeared significantly higher in marine ecosystems than in other biomes. Furthermore, significant genetic similarity between viral communities of related environments was highlighted as freshwater, marine and hypersaline environments were separated from each other despite the vast geographical distances between sample locations within each of these biomes. An automated phylogeny procedure was then applied to marker genes of the major families of single-stranded (Microviridae, Circoviridae, Nanoviridae) and double-stranded (Caudovirales) DNA viruses. These phylogeneti
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Assessing the diversity and specificity of two freshwater viral communities through metagenomics.
PLoS ONE, 2012Co-Authors: Simon Roux, François Enault, Agnès Robin, Viviane Ravet, Sébastien Personnic, Sébastien Theil, Jonathan Colombet, Télesphore Sime-ngando, Didier DebroasAbstract:Transitions between saline and fresh waters have been shown to be infrequent for microorganisms. Based on host-specific interactions, the presence of specific clades among hosts suggests the existence of freshwater-specific viral clades. Yet, little is known about the composition and diversity of the temperate freshwater viral communities, and even if freshwater lakes and marine waters harbor distinct clades for particular viral sub-families, this distinction remains to be demonstrated on a community scale.To help identify the characteristics and potential specificities of freshwater viral communities, such communities from two lakes differing by their ecological parameters were studied through metagenomics. Both the cluster Richness and the Species Richness of the Lake Bourget virome were significantly higher that those of the Lake Pavin, highlighting a trend similar to the one observed for microorganisms (i.e. the Specie Richness observed in mesotrophic lakes is greater than the one observed in oligotrophic lakes). Using 29 previously published viromes, the cluster Richness was shown to vary between different environment types and appeared significantly higher in marine ecosystems than in other biomes. Furthermore, significant genetic similarity between viral communities of related environments was highlighted as freshwater, marine and hypersaline environments were separated from each other despite the vast geographical distances between sample locations within each of these biomes. An automated phylogeny procedure was then applied to marker genes of the major families of single-stranded (Microviridae, Circoviridae, Nanoviridae) and double-stranded (Caudovirales) DNA viruses. These phylogenetic analyses all spotlighted a very broad diversity and previously unknown clades undetectable by PCR analysis, clades that gathered sequences from the two lakes. Thus, the two freshwater viromes appear closely related, despite the significant ecological differences between the two lakes. Furthermore, freshwater viral communities appear genetically distinct from other aquatic ecosystems, demonstrating the specificity of freshwater viruses at a community scale for the first time.
Sébastien Personnic - One of the best experts on this subject based on the ideXlab platform.
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Assessing the Diversity and Specificity of Two Freshwater Viral Communities through Metagenomics
2013Co-Authors: Simon Roux, François Enault, Agnès Robin, Viviane Ravet, Sébastien PersonnicAbstract:Transitions between saline and fresh waters have been shown to be infrequent for microorganisms. Based on host-specific interactions, the presence of specific clades among hosts suggests the existence of freshwater-specific viral clades. Yet, little is known about the composition and diversity of the temperate freshwater viral communities, and even if freshwater lakes and marine waters harbor distinct clades for particular viral sub-families, this distinction remains to be demonstrated on a community scale. To help identify the characteristics and potential specificities of freshwater viral communities, such communities from two lakes differing by their ecological parameters were studied through metagenomics. Both the cluster Richness and the Species Richness of the Lake Bourget virome were significantly higher that those of the Lake Pavin, highlighting a trend similar to the one observed for microorganisms (i.e. the Specie Richness observed in mesotrophic lakes is greater than the one observed in oligotrophic lakes). Using 29 previously published viromes, the cluster Richness was shown to vary between different environment types and appeared significantly higher in marine ecosystems than in other biomes. Furthermore, significant genetic similarity between viral communities of related environments was highlighted as freshwater, marine and hypersaline environments were separated from each other despite the vast geographical distances between sample locations within each of these biomes. An automated phylogeny procedure was then applied to marker genes of the major families of single-stranded (Microviridae, Circoviridae, Nanoviridae) and double-stranded (Caudovirales) DNA viruses. These phylogeneti
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Assessing the diversity and specificity of two freshwater viral communities through metagenomics.
PLoS ONE, 2012Co-Authors: Simon Roux, François Enault, Agnès Robin, Viviane Ravet, Sébastien Personnic, Sébastien Theil, Jonathan Colombet, Télesphore Sime-ngando, Didier DebroasAbstract:Transitions between saline and fresh waters have been shown to be infrequent for microorganisms. Based on host-specific interactions, the presence of specific clades among hosts suggests the existence of freshwater-specific viral clades. Yet, little is known about the composition and diversity of the temperate freshwater viral communities, and even if freshwater lakes and marine waters harbor distinct clades for particular viral sub-families, this distinction remains to be demonstrated on a community scale.To help identify the characteristics and potential specificities of freshwater viral communities, such communities from two lakes differing by their ecological parameters were studied through metagenomics. Both the cluster Richness and the Species Richness of the Lake Bourget virome were significantly higher that those of the Lake Pavin, highlighting a trend similar to the one observed for microorganisms (i.e. the Specie Richness observed in mesotrophic lakes is greater than the one observed in oligotrophic lakes). Using 29 previously published viromes, the cluster Richness was shown to vary between different environment types and appeared significantly higher in marine ecosystems than in other biomes. Furthermore, significant genetic similarity between viral communities of related environments was highlighted as freshwater, marine and hypersaline environments were separated from each other despite the vast geographical distances between sample locations within each of these biomes. An automated phylogeny procedure was then applied to marker genes of the major families of single-stranded (Microviridae, Circoviridae, Nanoviridae) and double-stranded (Caudovirales) DNA viruses. These phylogenetic analyses all spotlighted a very broad diversity and previously unknown clades undetectable by PCR analysis, clades that gathered sequences from the two lakes. Thus, the two freshwater viromes appear closely related, despite the significant ecological differences between the two lakes. Furthermore, freshwater viral communities appear genetically distinct from other aquatic ecosystems, demonstrating the specificity of freshwater viruses at a community scale for the first time.