Species Sorting and Neutral Theory Analyses Reveal Archaeal and Bacterial Communities Are Assembled Differently in Hot Springs

Just as the dispersal of individuals may link the dynamics of populations in space, the dispersal of species among communities may link local communities into a metacommunity. Four different perspectives characterize how dispersal rates, environmental heterogeneity, and species traits interact to influence diversity in metacommunities. These perspectives are: patch dynamics, species sorting, mass effects, and the neutral perspective. The neutral perspective stands in stark contrast to the other three perspectives in that it assumes that niche differences between species are unimportant and that species are demographically identical in terms of their birth, death, and dispersal rates. Under the neutral perspective, species diversity is maintained by a balance between speciation, extinction, and dispersal. Although neutral theory is incompatible with realistic modes and rates of speciation, it has been enormously influential in focusing our attention on the linkages between species interactions on local scales, and evolutionary and biogeographic processes occurring on large scales.

Download Full-text

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

10.5194/egusphere-egu2020-4567 ◽

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&#8217;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>

Download Full-text

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

The Science of The Total Environment ◽

10.1016/j.scitotenv.2014.10.012 ◽

2015 ◽

Vol 505 ◽

pp. 435-445 ◽

Cited By ~ 82

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

Download Full-text

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

Marine and Freshwater Research ◽

10.1071/mf19110 ◽

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.

Download Full-text

Archaeal and bacterial communities in three alkaline hot springs in Heart Lake Geyser Basin, Yellowstone National Park

Frontiers in Microbiology ◽

10.3389/fmicb.2013.00330 ◽

2013 ◽

Vol 4 ◽

Cited By ~ 27

Author(s):

Kara Bowen De León ◽

Robin Gerlach ◽

Brent M. Peyton ◽

Matthew W. Fields

Keyword(s):

Bacterial Communities ◽

Yellowstone National Park ◽

National Park ◽

Hot Springs

Download Full-text

Partitioning of bacterial communities between travertine depositional facies at Mammoth Hot Springs, Yellowstone National Park, U.S.A.

Canadian Journal of Earth Sciences ◽

10.1139/e03-067 ◽

2003 ◽

Vol 40 (11) ◽

pp. 1531-1548 ◽

Cited By ~ 55

Author(s):

Bruce W Fouke ◽

George T Bonheyo ◽

Beth Sanzenbacher ◽

Jorge Frias-Lopez

Keyword(s):

Bacterial Community ◽

Community Composition ◽

Bacterial Communities ◽

Yellowstone National Park ◽

National Park ◽

Hot Springs ◽

Bacterial Community Composition ◽

Drainage System ◽

Rrna Genes ◽

Depositional Facies

A culture-independent molecular survey indicates that the composition of bacterial communities is distinctly partitioned between travertine depositional facies in the surface drainage system of Spring AT-1 at Angel Terrace, Mammoth Hot Springs, Yellowstone National Park. PCR (polymerase chain reaction) amplification and sequencing of 16S rRNA genes with universally conserved bacterial primers has identified over 553 unique partial and 104 complete gene sequences (derived from more than 14 000 clones), affiliated with 221 unique species that represent 21 bacterial divisions. These sequences exhibited < 12% similarity in bacterial community composition between each of the travertine depositional facies. This implies that relatively little downstream bacterial transport and colonization took place despite the rapid and continuous flow of spring water from the high-temperature to low-temperature facies. These results suggest that travertine depositional facies, which are independently determined by the physical and chemical conditions of the hot spring drainage system, effectively predict bacterial community composition as well as the morphology and chemistry of travertine precipitation.

Download Full-text

The metagenomics of biosilicification: causes and effects

Mineralogical Magazine ◽

10.1180/minmag.2008.072.1.221 ◽

2008 ◽

Vol 72 (1) ◽

pp. 221-225 ◽

Cited By ~ 1

Author(s):

L. G. Benning ◽

D. J. Tobler

Keyword(s):

Microbial Diversity ◽

Bacterial Communities ◽

Phylogenetic Diversity ◽

Hot Springs ◽

Phylogenetic Analyses ◽

Geochemical Parameters ◽

Molecular Phylogenetic ◽

Geothermal Environments

AbstractIn order to determine the links between geochemical parameters controlling the formation of silica sinter in hot springs and their associated microbial diversity, a detailed characterisation of the waters and ofin situ-grown silica sinters was combined with molecular phylogenetic analyses of the bacterial communities in Icelandic geothermal environments. At all but one site, the microorganisms clearly affected, and in part controlled, the formation of the macroscopic textures and structures of silica sinter edifices. In addition, the class and genera level phylogenetic diversity and distribution appeared to be closely linked to variations in temperature, salinity and pH regimes.

Download Full-text

Partition among niche and neutral explanations for metacommunity patterns of fish from Cerrado streams

10.22541/au.164214661.19792299/v1 ◽

2022 ◽

Author(s):

Thiago Bernardi Vieira ◽

Liriann Chrisley Da Silva ◽

Jessica Silva ◽

Lilian Casatti ◽

Renato de Romero ◽

...

Keyword(s):

Neutral Theory ◽

Fish Communities ◽

Fish Fauna ◽

Mass Effect ◽

Species Selection ◽

Catchment Basin ◽

Species Sorting ◽

Neutral Processes ◽

Landscape Unit ◽

Metacommunity Structure

The Species-Sorting concept, one of the models developed to explain patterns in metacommunity structure, suggests that relationships between biological communities and environmental conditions is the basic means of the species selection processes. A second concept is Neutral Theory, and the idea of neutral dynamics underpinning metacommunity structure, cannot be overlooked. The third mechanism is the Mass-Effect concept, that focuses on the interaction between environmental condition and neutral effects. In the present study, we partitioned fish communities in streams between niche and neutral theory concepts, identifying the best representation of metacommunity structure, and assessed if linear and hydrographic distance were equivalent in the representation of neutral processes. The result points to the importance of species sorting mechanisms in structuring fish communities with neutral processes best represented by the linear distances. These results are important for the fish fauna conservation leading to three considerations: (i) the variation of the landscape and habitat is important for the stream fish, (ii) the natural barriers are an important landscape component to be considered, and (iii) the artificial barriers (dams and impoundments) need to be planned taking in account the catchment basin as the landscape unit.

Download Full-text

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

10.1101/847376 ◽

2019 ◽

Cited By ~ 3

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.

Download Full-text