scholarly journals Environmental filtering and spatial processes in urban riparian forests

2016 ◽  
Vol 27 (5) ◽  
pp. 1023-1035 ◽  
Author(s):  
Marie-Hélène Brice ◽  
Stéphanie Pellerin ◽  
Monique Poulin
Keyword(s):  
Environmental Filtering ◽  
Riparian Forests ◽  
Spatial Processes

scholarly journals Seasonal variation in the relative importance of assembly processes in marine fish communities as determined by environmental DNA analyses

2021 ◽  
Author(s):  
Naoto Shinohara ◽  
Yuki Hongo ◽  
Momoko Ichinokawa ◽  
Shota Nishijima ◽  
Shuhei Sawayama ◽  
...  
Keyword(s):  
Marine Fish ◽  
Seasonal Changes ◽  
Variation Partitioning ◽  
Environmental Filtering ◽  
Fish Communities ◽  
Environmental Dna ◽  
Compositional Variation ◽  
Short Time Scale ◽  
Relative Importance ◽  
Spatial Processes

Compositional variation among local communities is a result of environmental (e.g., environmental filtering) and spatial (e.g., dispersal limitation) processes. Growing evidence suggests that their relative importance varies temporally, but little is known about the short-time scale dynamics, that is, seasonality. Using marine fish communities in a Japanese bay as a model system, we tested the hypothesis that seasonal changes in the environment induce a shift in the relative importance of environmental and spatial processes. We used one-year monthly monitoring data obtained using environmental DNA and conducted a variation partitioning analysis to decompose the two processes. The relative importance of environmental and spatial processes was comparable averaged over the year but changed seasonally. During summer, when lower dissolved oxygen concentrations may adversely affect organisms, species composition was more explained by space despite larger environmental heterogeneity than in other seasons. This suggests that environmental processes weakened during the season with extremely severe environments, likely due to the random loss of individuals. We conclude that the assembly processes of communities of mobile organisms, such as fishes, can shift even within a year in response to seasonal changes in environmental severity. The results also indicate the applicability of eDNA techniques for community assembly studies.

scholarly journals Community metabarcoding reveals the relative role of environmental filtering and spatial processes in metacommunity dynamics of soil microarthropods across a mosaic of montane forests

2021 ◽  
Author(s):  
Víctor Noguerales ◽  
Emmanouil Meramveliotakis ◽  
Adrián Castro‐Insua ◽  
Carmelo Andújar ◽  
Paula Arribas ◽  
...  
Keyword(s):  
Environmental Filtering ◽  
Relative Role ◽  
Spatial Processes ◽  
Montane Forests ◽  
Soil Microarthropods ◽  
Metacommunity Dynamics

scholarly journals The Joint Contributions of Environmental Filtering and Spatial Processes to Macroinvertebrate Metacommunity Dynamics in the Alpine Stream Environment of Baima Snow Mountain, Southwest China

Diversity ◽  
2022 ◽  
Vol 14 (1) ◽  
pp. 28
Author(s):  
Muhammad Farooq ◽  
Xianfu Li ◽  
Zhengfei Li ◽  
Ronglong Yang ◽  
Zhen Tian ◽  
...  
Keyword(s):  
Community Ecology ◽  
Community Assembly ◽  
Temporal Dynamics ◽  
Explanatory Power ◽  
Environmental Filtering ◽  
Ecological Factors ◽  
Spatial Processes ◽  
Relative Significance ◽  
Alpine Stream ◽  
Over Time

While macroinvertebrates are extensively investigated in many river ecosystems, meta-community ecology perspectives in alpine streams are very limited. We assessed the role of ecological factors and temporal dynamics in the macroinvertebrate meta-community assembly of an alpine stream situated in a dry-hot valley of Baima Snow Mountain, China. We found that spatial structuring and environmental filtering jointly drive the structure of macroinvertebrate meta-community, with relative contributions to the variance in community composition changing over time. RDA ordination and variation partitioning indicate that environmental variables are the most important predictors of community organization in most scenarios, whereas spatial determinants also play a significant role. Moreover, the explanatory power, identity, and the relative significance of ecological factors change over time. Particularly, in the years 2018 and 2019, stronger environmental filtering was found shaping community assembly, suggesting that deterministic mechanisms predominated in driving community dynamics. However, spatial factors had a stronger predictive power on meta-community structures in 2017, implying conspicuous dispersal mechanisms which may be owing to increased connectivity amongst sites. Thereby, we inferred that the alpine stream macroinvertebrate metacommunity composition can be regulated by the interaction of both spatial processes and environmental filtering, with relative contributions varying over time. Based on these findings, we suggest that community ecology studies in aquatic systems should be designed beyond single snapshot investigations.

scholarly journals Environmental filtering and spatial processes equally contributed to macroinvertebrate metacommunity dynamics in the highly urbanized river networks in Shenzhen, South China

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Zhenyuan Liu ◽  
Tingting Zhou ◽  
Yongde Cui ◽  
Zhengfei Li ◽  
Weimin Wang ◽  
...  
Keyword(s):  
South China ◽  
Community Dynamics ◽  
Environmental Filtering ◽  
Ecological Factors ◽  
Urban River ◽  
River Networks ◽  
Ecological Communities ◽  
Spatial Processes ◽  
Metacommunity Ecology ◽  
Dry Seasons

Abstract Background Disentangling the relative roles of environmental filtering and spatial processes in structuring ecological communities is a central topic in metacommunity ecology. Metacommunity ecology in the temperate river ecosystems has been well developed, while less attention has been paid to subtropical urban river networks. Here, we examined the ecological factors and seasonal difference in structuring macroinvertebrates metacommunity assembly in the subtropical urban river networks in Shenzhen, South China. Results Our results revealed that there was no significant distinction of macroinvertebrate community composition among seasons, with only the relative abundance of Mollusca and Odonata significantly differed in both wet and dry seasons. One possible explanation was that most macroinvertebrates are generally pollution-tolerant taxa characterized with nonseasonal life cycle. In addition, distance-based redundancy analysis and variation partitioning approach revealed that metacommunity was determined equally by the environmental and dispersal-related factors. Further, our results showed that, although a slight temporal variation of relative contribution, the identity and explanation power of ecological factors were different among seasons. Specifically, stronger environmental filtering structuring community dynamics was observed in the dry than wet seasons, which might be owing to higher environmental heterogeneity under a low water-flow condition. Moreover, we detected that the influence of spatial processes was stronger in the wet than dry seasons, indicating an obvious dispersal processes due to high connectivity among sites. Conclusion Overall, our results revealed that environmental and spatial factors equally explained variations of macroinvertebrate metacommunity, implying the necessity of considering dispersal-related processes structuring ecological communities in river bioassessment programs. Moreover, degraded habitat conditions and water quality were the predominant factors that affected macroinvertebrate communities, indicating the significance and feasibility of improving local abiotic conditions to sustain local biodiversity. Further, our findings revealed the importance of seasonal dynamics of these urban river networks in structuring macroinvertebrate metacommunity. Thereby, our study improves the understanding of ecological processes governing macroinvertebrate metacommunity and underlines the idea that community ecology studies should go beyond the single snapshot survey in river networks.

Environmental filtering and spatial processes shape the beta diversity of liana communities in a valley savanna in southwest China

2020 ◽  
Vol 23 (4) ◽  
pp. 482-494 ◽  
Author(s):  
Yun‐Bing Zhang ◽  
Huai‐Dong Wu ◽  
Jie Yang ◽  
Xiao‐Yang Song ◽  
Da Yang ◽  
...  
Keyword(s):  
Beta Diversity ◽  
Southwest China ◽  
Environmental Filtering ◽  
Spatial Processes

scholarly journals The joint contributions of environmental filtering and spatial processes to macroinvertebrate metacommunity dynamics in the alpine stream environment of Baima Snow Mountain, Southwest China

2021 ◽  
Author(s):  
Muhammad Farooq ◽  
Xianfu Li ◽  
Zhengfei Li ◽  
Ronglong Yang ◽  
Zhen Tian ◽  
...  
Keyword(s):  
Community Ecology ◽  
Community Composition ◽  
Community Assembly ◽  
Environmental Filtering ◽  
Mountain Stream ◽  
High Mountain ◽  
Spatial Processes ◽  
Relative Significance ◽  
Alpine Stream ◽  
Over Time

As a rapidly growing field of community ecology, the study of meta-communities provides an effective framework to unravel community assembly mechanisms by focusing on the relative contributions of environmental screening and spatial processes. While macroinvertebrates have been extensively investigated in many river ecosystems, meta-community ecology perspectives in high mountain stream networks are very limited. In this study, we assessed the role of ecological determinants and temporal dynamics in the macroinvertebrate meta-community assembly of an alpine stream situated in a dry-hot valley of Baima Snow Mountain, Northwest Yunnan. Our results show significant differences in the macroinvertebrate community composition across time periods. Spatial structuring and environmental filtering jointly drive the configuration of macroinvertebrate meta-community, with relative contributions to the variance in community composition varying over time. Redundancy Analysis (RDA) and variation partitioning indicate that environmental variables are the most important predictors of community organization in most scenarios, whereas spatial determinants also play a significant role. Moreover, the explanatory power, identity, and the relative significance of ecological indicators change over time. Particularly, in the years 2018 and 2019, stronger environmental filtering was found shaping community assembly, suggesting that deterministic mechanisms predominated in driving community dynamics in such a specific environment of the stream. However, spatial factors had a stronger predictive power on meta-community structures in 2017, implying conspicuous dispersal mechanisms which may be owing to increased connectivity amongst locations. Thereby, we inferred that the stream macroinvertebrate metacommunity composition can be regulated by the interaction of both spatial processes and environmental filtering, with relative contributions varying over time. Based on these findings, we suggest that community ecology studies in aquatic systems should be designed beyond single snapshot investigations.

scholarly journals The Interplay between Environmental Filtering and Spatial Processes in Structuring Communities: The Case of Neotropical Snake Communities

PLoS ONE ◽  
2015 ◽  
Vol 10 (6) ◽  
pp. e0127959 ◽  
Author(s):  
Hamanda Cavalheri ◽  
Camila Both ◽  
Marcio Martins
Keyword(s):  
Environmental Filtering ◽  
Spatial Processes

Disentangling the effects of propagule supply and environmental filtering on the spatial structure of a rocky shore metacommunity

2015 ◽  
Vol 538 ◽  
pp. 67-79 ◽  
Author(s):  
N Valdivia ◽  
MA Aguilera ◽  
SA Navarrete ◽  
BR Broitman
Keyword(s):  
Spatial Structure ◽  
Rocky Shore ◽  
Environmental Filtering ◽  
Propagule Supply

Retinex Algorithms: Many spatial processes used to solve many different problems

2016 ◽  
Vol 2016 (6) ◽  
pp. 1-10 ◽  
Author(s):  
JohnJ McCann
Keyword(s):  
Spatial Processes

Characteristic of modelling spatial processes using geostatistical analysis

2019 ◽  
Vol 64 (2) ◽  
pp. 415-426
Author(s):  
Oksana Grynyshyna-Poliuga
Keyword(s):  
Geostatistical Analysis ◽  
Spatial Processes
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