scholarly journals The importance of species sorting differs between habitat generalists and specialists in bacterial communities

2013 ◽  
Vol 87 (1) ◽  
pp. 102-112 ◽  
Author(s):  
Anna J. Székely ◽  
Silke Langenheder
Keyword(s):  
Bacterial Communities ◽  
Species Sorting ◽  
Habitat Generalists

Integrated biogeography and assembly process of planktonic and sedimentary bacterial communities in the Yangtze River

2020 ◽  
Author(s):  
Tang Liu ◽  
Jiawen Wang ◽  
Shufeng Liu ◽  
Qian Chen ◽  
Chunmiao Zheng ◽  
...  
Keyword(s):  
Bacterial Communities ◽  
Yangtze River ◽  
Selection Process ◽  
Anthropogenic Impacts ◽  
Spatiotemporal Pattern ◽  
Assembly Process ◽  
The Yangtze River ◽  
Species Sorting ◽  
Biogeographic Patterns ◽  
Water And Sediment

<p>Bacterial communities are essential to the biogeochemical cycle in riverine ecosystems. However, the integrated biogeography and assembly process of planktonic and sedimentary bacterial communities in large rivers is still poorly understood. Here, the study provided the spatiotemporal pattern of bacterial communities in the Yangtze River of 4300 km continuum, which is the largest river in Asia. We found that the taxa in sediments are the main contributors to the bacterial diversity of the river ecosystem since sediments sub-group took 98.8% of the total 38, 904 Operational Taxonomic Units (OTUs) observed in 280 samples. Seasonal differences in bacterial communities were statistically significant in water, whereas bacterial communities in both water and sediment were geographically clustered according to five types of landforms: mountain, foothill, basin, foothill-mountain, and plain. Interestingly, the presence of two huge dams resulted in a drastic fall of bacterial taxa in sediment immediately downstream due to severe riverbed scouring. The integrity of the biogeography was satisfactorily interpreted by the combination of neutral and species sorting perspectives in meta-community theory for bacterial communities in flowing water and sediment. Although deterministic process had dominant influence on assembly processes in water and sediment communities, homogeneous selection was the main contributor in water, while combination of homogeneous selection and variable selection contributed selection process in sediment. In addition, homogenizing dispersal played more important role in community assembly process in sediment than water. Our study fills a gap in understanding of biogeography and assembly process of bacterial communities in one of the world’s largest river and highlights the importance of both planktonic and sedimentary communities to the integrity of bacterial biogeographic patterns in a river subject to varying natural and anthropogenic impacts.</p>

Species sorting and seasonal dynamics primarily shape bacterial communities in the Upper Mississippi River

2015 ◽  
Vol 505 ◽  
pp. 435-445 ◽  
Author(s):  
Christopher Staley ◽  
Trevor J. Gould ◽  
Ping Wang ◽  
Jane Phillips ◽  
James B. Cotner ◽  
...  
Keyword(s):  
Mississippi River ◽  
Seasonal Dynamics ◽  
Bacterial Communities ◽  
Upper Mississippi River ◽  
Species Sorting

Turnover is replaced by nestedness with increasing geographical distance in bacterial communities of coastal shallow lakes

2020 ◽  
Vol 71 (9) ◽  
pp. 1086
Author(s):  
Marla Sonaira Lima ◽  
Fabiana Schneck ◽  
Ng Haig They ◽  
Luciane Oliveira Crossetti ◽  
Juliana Elisa Bohnenberger ◽  
...  
Keyword(s):  
Shallow Lakes ◽  
Bacterial Communities ◽  
Local Environment ◽  
Dispersal Limitation ◽  
Geographical Distance ◽  
Environmental Filters ◽  
Species Sorting ◽  
Relative Contribution ◽  
Β Diversity ◽  
The Relationship

In this study we measured the relative contribution of two components of β-diversity, turnover and nestedness, of bacterioplankton among 25 shallow lakes in southern Brazil and tested their relationship with local (environment, chlorophyll-a and biomass of phytoplanktonic classes) and landscape variables, as well as geographical distance. We predicted that turnover would be the largest share of total β-diversity due to the variation of local characteristics among lakes. Further, we expected nestedness to increase at the expense of turnover with increasing geographical distance among lakes due to dispersal limitation. The results indicated a higher contribution of turnover than nestedness to total β-diversity, which was driven by local factors. When the relationship between β-diversity components and the spatial extent between each lake and all other lakes was considered, turnover was replaced by nestedness with increasing geographical distance for 8 (the furthermost lakes) of the 25 lakes likely because of a combination of decreasing dispersal due to distance and richness differences due to wind-driven mass effects. The results of this study suggest a role for nestedness as an indicator of dispersal limitation owing to geographical distance and wind dispersal, and for turnover as an indicator of species sorting because of environmental filters for these freshwater bacterial communities.

scholarly journals Linked networks reveal dual roles of insect dispersal and species sorting for bacterial communities in flowers

2019 ◽  
Author(s):  
Ash T. Zemenick ◽  
Rachel L. Vannette ◽  
Jay A. Rosenheim
Keyword(s):  
Plant Species ◽  
Community Assembly ◽  
Bacterial Communities ◽  
Structural Features ◽  
Relative Importance ◽  
Dispersal Rate ◽  
Dual Roles ◽  
Species Sorting ◽  
Insect Dispersal ◽  
Microbial Community Assembly

AbstractDue to the difficulty of tracking microbial dispersal, it rarely possible to disentangle the relative importance of dispersal and species sorting for microbial community assembly. Here, we leverage a detailed multilevel network to examine drivers of bacterial community assembly within flowers. We show that plant species with similar visitor communities tend to have similar bacterial communities, and visitor identity to be more important than dispersal rate in structuring floral bacterial communities. However, plants occupied divergent positions in plant-insect and plant-microbe networks, suggesting an important role for species sorting. Taken together, our analyses suggest dispersal is important in determining similarity in microbial communities across plant species, but not as important in determining structural features of the floral bacterial network. A multilevel network approach thus allows us to address features of community assembly that cannot be considered when viewing networks as separate entities.

Both species sorting and neutral processes drive assembly of bacterial communities in aquatic microcosms

2013 ◽  
Vol 86 (2) ◽  
pp. 288-302 ◽  
Author(s):  
Jack E. Lee ◽  
Hannah L. Buckley ◽  
Rampal S. Etienne ◽  
Gavin Lear
Keyword(s):  
Bacterial Communities ◽  
Species Sorting ◽  
Aquatic Microcosms ◽  
Neutral Processes

Habitat generalists drive nestedness in a tropical mountaintop insect metacommunity

2020 ◽  
Author(s):  
Frederico de Siqueira Neves ◽  
Pedro Giovâni da Silva ◽  
Ricardo Solar ◽  
Cássio Alencar Nunes ◽  
Marina do Vale Beirão ◽  
...  
Keyword(s):  
Habitat Specialization ◽  
Ecosystem Functions ◽  
Campo Rupestre ◽  
Species Sorting ◽  
Generalist Species ◽  
Habitat Specialists ◽  
Contrasting Habitats ◽  
Specialist Species ◽  
Underlying Mechanisms ◽  
Habitat Generalists

Abstract Nestedness is widely observed in natural metacommunities, but its underlying mechanisms are still poorly understood. The distribution of habitats in the landscape and differences in dispersal rates of distinct insect taxa can determine the nestedness of the metacommunity. Here, we evaluated how species habitat specialization contributes to metacommunity nestedness in insect groups with different dispersal capacities in a mountaintop landscape in south-eastern Brazil. We sampled ants, butterflies and dung beetles in two main habitats, naturally fragmented forest islands and a grassland matrix (campo rupestre), during both dry and rainy seasons. We classified species according to their degree of habitat specialization (generalists or specialists) based on the relative frequencies and abundances between these two contrasting habitats. Forty of 211 species were classified as habitat specialists, seven as habitat generalists. It was not possible to classify the remaining species. The metacommunity was nested in structure, with habitat generalist species contributing more to nestedness than habitat specialists. Nonetheless, habitat distribution in the landscape did not affect the nestedness of the metacommunity. Our findings reveal that species sorting (for habitat specialists) and mass effects (for habitat generalists) are concurrent processes in the mountaintop forest–grassland mosaic. Our study helps to advance our understanding of the differences in the distribution of generalist and specialist species in a tropical mountaintop landscape and improves our ability to predict and manage the increasingly adverse effects of changes in land use and climate on metacommunities and ecosystem functions.

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