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Non-additive effects of dispersal and selective stress on structure, evenness, and biovolume production in marine diatom communities

Jonathan De Raedt UGent, Jan Baert UGent, Colin Janssen UGent and Frederik De Laender UGent (2017) HYDROBIOLOGIA. 788(1). p.385-396
abstract
Changes in environmental conditions can impose stress that alters the structure and function of communities. However, ecologists are only starting to explore how stress can interact with dispersal. In this study, we tested how dispersal affects the structure, diversity (evenness), and function (productivity) of marine diatom communities (Bacillariophyceae) exposed to herbicide stress using a mainland-island framework. In a microcosm experiment, we manipulated the sequence (5 levels) and speed (two dispersal levels) of species arrival under no-stress conditions and two levels of stress. When stress was absent or low, priority effects regulated community dynamics, keeping the densities of new arrivers low. Consequently, evenness was lower in dispersed than in non dispersed communities. Moreover, because of strong local interactions, dispersal decreased productivity under no-stress conditions and low stress. Under high stress, the selection for tolerant species regulated community dynamics. This generated a decrease in evenness but buffered productivity by compensating for the loss of sensitive species. Our results show that (1) dispersal reduced evenness, but that underlying mechanisms depend on the stress-level, and (2) dispersal can function as a spatial insurance against local changes in environmental conditions. Accounting for regional processes is therefore essential for estimating the consequences of environmental changes for ecosystem functions.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
Priority effects, Dispersal, Toxic stress, Productivity, Community assembly, PHYTOPLANKTON COMMUNITIES, BIOMASS PRODUCTION, ECOLOGICAL COMMUNITIES, ECOSYSTEM PROCESSES, SPATIAL INSURANCE, PLANT-COMMUNITIES, LOCAL BIOMASS, BIODIVERSITY, DIVERSITY, METACOMMUNITIES
journal title
HYDROBIOLOGIA
Hydrobiologia
volume
788
issue
1
pages
385 - 396
Web of Science type
Article
Web of Science id
000392386500027
ISSN
0018-8158
DOI
10.1007/s10750-016-3016-z
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
8125436
handle
http://hdl.handle.net/1854/LU-8125436
date created
2016-10-24 17:19:09
date last changed
2017-06-27 11:41:09
@article{8125436,
  abstract     = {Changes in environmental conditions can impose stress that alters the structure and function of communities. However, ecologists are only starting to explore how stress can interact with dispersal. In this study, we tested how dispersal affects the structure, diversity (evenness), and function (productivity) of marine diatom communities (Bacillariophyceae) exposed to herbicide stress using a mainland-island framework. In a microcosm experiment, we manipulated the sequence (5 levels) and speed (two dispersal levels) of species arrival under no-stress conditions and two levels of stress. When stress was absent or low, priority effects regulated community dynamics, keeping the densities of new arrivers low. Consequently, evenness was lower in dispersed than in non
dispersed communities. Moreover, because of strong local interactions, dispersal decreased productivity under no-stress conditions and low stress. Under high stress, the selection for tolerant species regulated community dynamics. This generated a decrease in evenness but buffered productivity by compensating for the loss of sensitive species. Our results show that (1) dispersal reduced evenness, but that underlying mechanisms depend on the stress-level, and (2) dispersal can function as a spatial insurance against local changes in environmental conditions. Accounting for regional processes is therefore essential for estimating the consequences of environmental changes for ecosystem functions.},
  author       = {De Raedt, Jonathan and Baert, Jan and Janssen, Colin and De Laender, Frederik},
  issn         = {0018-8158},
  journal      = {HYDROBIOLOGIA},
  keyword      = {Priority effects,Dispersal,Toxic stress,Productivity,Community assembly,PHYTOPLANKTON COMMUNITIES,BIOMASS PRODUCTION,ECOLOGICAL COMMUNITIES,ECOSYSTEM PROCESSES,SPATIAL INSURANCE,PLANT-COMMUNITIES,LOCAL BIOMASS,BIODIVERSITY,DIVERSITY,METACOMMUNITIES},
  language     = {eng},
  number       = {1},
  pages        = {385--396},
  title        = {Non-additive effects of dispersal and selective stress on structure, evenness, and biovolume production in marine diatom communities},
  url          = {http://dx.doi.org/10.1007/s10750-016-3016-z},
  volume       = {788},
  year         = {2017},
}

Chicago
De Raedt, Jonathan, Jan Baert, Colin Janssen, and Frederik De Laender. 2017. “Non-additive Effects of Dispersal and Selective Stress on Structure, Evenness, and Biovolume Production in Marine Diatom Communities.” Hydrobiologia 788 (1): 385–396.
APA
De Raedt, J., Baert, J., Janssen, C., & De Laender, F. (2017). Non-additive effects of dispersal and selective stress on structure, evenness, and biovolume production in marine diatom communities. HYDROBIOLOGIA, 788(1), 385–396.
Vancouver
1.
De Raedt J, Baert J, Janssen C, De Laender F. Non-additive effects of dispersal and selective stress on structure, evenness, and biovolume production in marine diatom communities. HYDROBIOLOGIA. 2017;788(1):385–96.
MLA
De Raedt, Jonathan, Jan Baert, Colin Janssen, et al. “Non-additive Effects of Dispersal and Selective Stress on Structure, Evenness, and Biovolume Production in Marine Diatom Communities.” HYDROBIOLOGIA 788.1 (2017): 385–396. Print.