نتایج جستجو برای: phylogenetic diversity

تعداد نتایج: 241775  

Journal: :FEMS microbiology ecology 2015
Eduardo Pérez-Valera Marta Goberna Miguel Verdú

Quantifying diversity with phylogeny-informed metrics helps understand the effects of diversity on ecosystem functioning (EF). The sign of these effects remains controversial because phylogenetic diversity and taxonomic identity may interactively influence EF. Positive relationships, traditionally attributed to complementarity effects, seem unimportant in natural soil bacterial communities. Neg...

1999
CYMON J. COX BERNARD GOFFINET NORMAN J. WICKETT SANDRA B. BOLES JONATHAN SHAW

In this study we present phylogenetic and molecular phylogenetic diversity analyses of moss taxa from a total of 655 genera of mosses. Three loci were sampled: chloroplast ribosomal small protein 4, the intronic region of the mitochondrial NADH dehydogenase subunit 5, and partial sequences of the nuclear 26S ribosomal RNA. Maximum likelihood and Bayesian phylogenetic analyses were performed on ...

Journal: :Ecology 2015
Xugao Wang Thorsten Wiegand Nathan G Swenson Amy T Wolf Robert W Howe Zhanqing Hao Fei Lin Ji Ye Zuoqiang Yuan

Although trait information has been widely used to explore underlying mechanisms of forest community structure, most studies have focused on local patterns of phylogenetic or functional alpha diversity. Investigations of functional beta diversity, on the other hand, have not been conducted at local scales in a spatially explicit way. In this study, we provide a powerful methodology based on rec...

Journal: :Philosophical transactions of the Royal Society of London. Series B, Biological sciences 2015
Danwei Huang Kaustuv Roy

One-third of the world's reef-building corals are facing heightened extinction risk from climate change and other anthropogenic impacts. Previous studies have shown that such threats are not distributed randomly across the coral tree of life, and future extinctions have the potential to disproportionately reduce the phylogenetic diversity of this group on a global scale. However, the impact of ...

Journal: :Ecology letters 2008
Catherine H Graham Paul V A Fine

A key challenge in ecological research is to integrate data from different scales to evaluate the ecological and evolutionary mechanisms that influence current patterns of biological diversity. We build on recent attempts to incorporate phylogenetic information into traditional diversity analyses and on existing research on beta diversity and phylogenetic community ecology. Phylogenetic beta di...

2017
Juan Ernesto Guevara Andino Nigel C A Pitman Hans Ter Steege Hugo Mogollón Carlos Ceron Walter Palacios Nora Oleas Paul V A Fine

Using complementary metrics to evaluate phylogenetic diversity can facilitate the delimitation of floristic units and conservation priority areas. In this study, we describe the spatial patterns of phylogenetic alpha and beta diversity, phylogenetic endemism, and evolutionary distinctiveness of the hyperdiverse Ecuador Amazon forests and define priority areas for conservation. We established a ...

2015
Nathalie S. Nagalingum Nunzio Knerr Shawn W. Laffan Carlos E. González-Orozco Andrew H. Thornhill Joseph T. Miller Brent D. Mishler

Because ferns have a wide range of habitat preferences and are widely distributed, they are an ideal group for understanding how diversity is distributed. Here we examine fern diversity on a broad-scale using standard and corrected richness measures as well as phylogenetic indices; in addition we determine the environmental predictors of each diversity metric. Using the combined records of Aust...

2017
Jung-Hwa Chun Chang-Bae Lee

Recently, new alternative matrices of biodiversity such as phylogenetic and functional diversity as a complement to species diversity have provided new insights into the mechanisms of community assembly. In this study, we analyzed the phylogenetic signals of five functional traits and the relative contribution of environmental variables and distance matrices to the alpha and beta components of ...

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