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Global shifts towards positive species interactions with increasing environmental stress

Ecology letters, 2013-05, Vol.16 (5), p.695-706 [Peer Reviewed Journal]

2013 Blackwell Publishing Ltd/CNRS ;2014 INIST-CNRS ;2013 Blackwell Publishing Ltd/CNRS. ;ISSN: 1461-023X ;EISSN: 1461-0248 ;DOI: 10.1111/ele.12080 ;PMID: 23363430

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Title:
Global shifts towards positive species interactions with increasing environmental stress
Author: He, Qiang ; Bertness, Mark D. ; Altieri, Andrew H.
Vila, Montserrat ; Vila, Montserrat
Subjects: Abiotic stress ; Animal and plant ecology ; Animal, plant and microbial ecology ; Applied ecology ; Biological and medical sciences ; Biotic interactions ; Climate ; Community ecology ; Conservation, protection and management of environment and wildlife ; Databases, Factual ; Ecosystem ; ecosystems and climates ; Environment ; environmental stress ; facilitation ; Fundamental and applied biological sciences. Psychology ; General aspects ; invasive species ; meta-analysis ; Mortality ; Multifactorial Inheritance ; Parks, reserves, wildlife conservation. Endangered species: population survey and restocking ; Plant ecology ; Plant Physiological Phenomena ; Plant populations ; plant traits ; Stress, Physiological ; Synecology ; the stress-gradient hypothesis
Is Part Of: Ecology letters, 2013-05, Vol.16 (5), p.695-706
Description: The study of positive species interactions is a rapidly evolving field in ecology. Despite decades of research, controversy has emerged as to whether positive and negative interactions predictably shift with increasing environmental stress as hypothesised by the stress‐gradient hypothesis (SGH). Here, we provide a synthesis of 727 tests of the SGH in plant communities across the globe to examine its generality across a variety of ecological factors. Our results show that plant interactions change with stress through an outright shift to facilitation (survival) or a reduction in competition (growth and reproduction). In a limited number of cases, plant interactions do not respond to stress, but they never shift towards competition with stress. These findings are consistent across stress types, plant growth forms, life histories, origins (invasive vs. native), climates, ecosystems and methodologies, though the magnitude of the shifts towards facilitation with stress is dependent on these factors. We suggest that future studies should employ standardised definitions and protocols to test the SGH, take a multi‐factorial approach that considers variables such as plant traits in addition to stress, and apply the SGH to better understand how species and communities will respond to environmental change.
Publisher: Oxford: Blackwell Publishing Ltd
Language: English
Identifier: ISSN: 1461-023X
EISSN: 1461-0248
DOI: 10.1111/ele.12080
PMID: 23363430
Source: MEDLINE
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Global shifts towards positive species interactions with increasing environmental stress

2013 Blackwell Publishing Ltd/CNRS ;2014 INIST-CNRS ;2013 Blackwell Publishing Ltd/CNRS. ;ISSN: 1461-023X ;EISSN: 1461-0248 ;DOI: 10.1111/ele.12080 ;PMID: 23363430

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