scholarly journals Changes in tree community structure in defaunated forests are not driven only by dispersal limitation

2020 ◽  
Vol 10 (7) ◽  
pp. 3392-3401
Author(s):  
Kirstie Hazelwood ◽  
C. E. Timothy Paine ◽  
Fernando H. Cornejo Valverde ◽  
Elizabeth G. Pringle ◽  
Harald Beck ◽  
...  
Keyword(s):  
Community Structure ◽  
Dispersal Limitation ◽  
Tree Community

scholarly journals Effects of Topographical and Edaphic Factors on Tree Community Structure and Diversity of Subtropical Mountain Forests in the Lower Lancang River Basin

Forests ◽  
2016 ◽  
Vol 7 (12) ◽  
pp. 222 ◽  
Author(s):  
Changshun Zhang ◽  
Xiaoying Li ◽  
Long Chen ◽  
Gaodi Xie ◽  
Chunlan Liu ◽  
...  
Keyword(s):  
Community Structure ◽  
River Basin ◽  
Mountain Forests ◽  
Edaphic Factors ◽  
Lancang River ◽  
Tree Community

scholarly journals Soil resources and topography shape local tree community structure in tropical forests

2013 ◽  
Vol 280 (1753) ◽  
pp. 20122532 ◽  
Author(s):  
Claire A. Baldeck ◽  
Kyle E. Harms ◽  
Joseph B. Yavitt ◽  
Robert John ◽  
Benjamin L. Turner ◽  
...  
Keyword(s):  
Community Structure ◽  
Tropical Forests ◽  
Environmental Variables ◽  
Variation Partitioning ◽  
Compositional Variation ◽  
Habitat Filtering ◽  
Soil Resources ◽  
Soil Resource ◽  
Compositional Structure ◽  
Tree Community

Both habitat filtering and dispersal limitation influence the compositional structure of forest communities, but previous studies examining the relative contributions of these processes with variation partitioning have primarily used topography to represent the influence of the environment. Here, we bring together data on both topography and soil resource variation within eight large (24–50 ha) tropical forest plots, and use variation partitioning to decompose community compositional variation into fractions explained by spatial, soil resource and topographic variables. Both soil resources and topography account for significant and approximately equal variation in tree community composition (9–34% and 5–29%, respectively), and all environmental variables together explain 13–39% of compositional variation within a plot. A large fraction of variation (19–37%) was spatially structured, yet unexplained by the environment, suggesting an important role for dispersal processes and unmeasured environmental variables. For the majority of sites, adding soil resource variables to topography nearly doubled the inferred role of habitat filtering, accounting for variation in compositional structure that would previously have been attributable to dispersal. Our results, illustrated using a new graphical depiction of community structure within these plots, demonstrate the importance of small-scale environmental variation in shaping local community structure in diverse tropical forests around the globe.

scholarly journals Characterizing the Phylogenetic Tree Community Structure of a Protected Tropical Rain Forest Area in Cameroon

PLoS ONE ◽  
2014 ◽  
Vol 9 (6) ◽  
pp. e98920 ◽  
Author(s):  
Stéphanie Manel ◽  
Thomas L. P. Couvreur ◽  
François Munoz ◽  
Pierre Couteron ◽  
Olivier J. Hardy ◽  
...  
Keyword(s):  
Community Structure ◽  
Phylogenetic Tree ◽  
Rain Forest ◽  
Tropical Rain Forest ◽  
Forest Area ◽  
Tree Community

scholarly journals Defining marine microbial biomes from environmental and dispersal filtered metapopulations

2017 ◽  
Author(s):  
Markus V. Lindh
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Microbial Community Structure ◽  
Spatial Scales ◽  
Dispersal Limitation ◽  
Global Ocean ◽  
Microbial Populations ◽  
Microbial Biogeography ◽  
Metapopulation Theory ◽  
Mock Communities

SummaryEnergy and matter fluxes essential for all life1 are modulated by spatial and temporal shifts in microbial community structure resulting from environmental and dispersal filtering2,3, emphasizing the continued need to characterize microbial biogeography4,5. Yet, application of metapopulation theory, traditionally used in general ecology for understanding shifts in biogeographical patterns among macroorganisms, has not been tested extensively for defining marine microbial populations filtered by environmental conditions and dispersal limitation at global ocean scales. Here we show, from applying metapopulation theory on two major global ocean datasets6,7, that microbial populations exhibit core- and satellite distributions with cosmopolitan compared to geographically restricted distributions of populations. We found significant bimodal occupancy-frequency patterns (the different number of species occupying different number of patches) at varying spatial scales, where shifts from bimodal to unimodal patterns indicated environmental and dispersal filtering. Such bimodal occupancy-frequency patterns were validated in Longhurst’s classical biogeographical framework and in silico where observed bimodal patterns often aligned with specific biomes and provinces described by Longhurst and where found to be non-random in randomized datasets and mock communities. Taken together, our results show that application of metapopulation theory provides a framework for determining distinct microbial biomes maintained by environmental and dispersal filtering.

scholarly journals Tree community structure and recruitment dynamics in savanna woodlands

2020 ◽  
Vol 12 (1) ◽  
pp. 71-103
Author(s):  
Bhola Nina ◽  
O. Ogutu Joseph ◽  
T. Dublin Holly ◽  
Van der Plas Fons ◽  
Piepho Hans-Peter ◽  
...  
Keyword(s):  
Community Structure ◽  
Tree Community
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