The stress gradient hypothesis (SGH) is an evolutionary theory in microbial ecology and community ecology that provides a framework to predict when positive or negative interactions should be observed in an habitat.[1][2] The SGH states that facilitation, cooperation or mutualism should be more common in stressful environments, compared with benign environments (i.e nutrient excess) where competition or parasitism should be more common.[3]
The stress gradient hypothesis, in which ecological interactions shift in a positive direction with increasing environmental stress, is controversial among ecologists, in part because of contradictory support, yet a 2021 meta analysis study compared SGH across different organisms with intraspecificity and interspecificity interacrions and conclude that the SGH is indeed a broadly relevant ecological phenomena that is currently held back by cross-disciplinary communication barriers.[4]
SGH is well supported by studies that feature bacteria, plants, terrestrial ecosystems, interspecific negative interactions, adults, survival instead of growth or reproduction, and drought, fire, and nutrient stress.
Drought and nutrient stress, especially when combined, shift ecological interactions positively.
Referencesedit
^Bertness, Mark D.; Callaway, Ragan (May 1994). "Positive interactions in communities". Trends in Ecology & Evolution. 9 (5): 191–193. doi:10.1016/0169-5347(94)90088-4. ISSN 0169-5347. PMID 21236818.
^Holmgren, M.; Scheffer, M. (2010). "Strong facilitation in mild environments: the stress gradient hypothesis revisited". Journal of Ecology. 98 (6): 1269–1275. doi:10.1111/j.1365-2745.2010.01709.x. S2CID 83827444.
^Hammarlund, Sarah P.; Harcombe, William R. (2019-07-18). "Refining the stress gradient hypothesis in a microbial community". Proceedings of the National Academy of Sciences. 116 (32): 15760–15762. Bibcode:2019PNAS..11615760H. doi:10.1073/pnas.1910420116. ISSN 0027-8424. PMC6690025. PMID 31320585.
^Adams, Amy E.; Besozzi, Elizabeth M.; Shahrokhi, Golya; Patten, Michael A. (2021-11-13). "A case for associational resistance: Apparent support for the stress gradient hypothesis varies with study system". Ecology Letters. 25 (1): 202–217. doi:10.1111/ele.13917. hdl:11250/2833572. ISSN 1461-023X. PMID 34775662. S2CID 244115652.
This ecology-related article is a stub. You can help Wikipedia by expanding it.
stress, gradient, hypothesis, stress, gradient, hypothesis, evolutionary, theory, microbial, ecology, community, ecology, that, provides, framework, predict, when, positive, negative, interactions, should, observed, habitat, states, that, facilitation, coopera. The stress gradient hypothesis SGH is an evolutionary theory in microbial ecology and community ecology that provides a framework to predict when positive or negative interactions should be observed in an habitat 1 2 The SGH states that facilitation cooperation or mutualism should be more common in stressful environments compared with benign environments i e nutrient excess where competition or parasitism should be more common 3 The stress gradient hypothesis in which ecological interactions shift in a positive direction with increasing environmental stress is controversial among ecologists in part because of contradictory support yet a 2021 meta analysis study compared SGH across different organisms with intraspecificity and interspecificity interacrions and conclude that the SGH is indeed a broadly relevant ecological phenomena that is currently held back by cross disciplinary communication barriers 4 SGH is well supported by studies that feature bacteria plants terrestrial ecosystems interspecific negative interactions adults survival instead of growth or reproduction and drought fire and nutrient stress Drought and nutrient stress especially when combined shift ecological interactions positively References edit Bertness Mark D Callaway Ragan May 1994 Positive interactions in communities Trends in Ecology amp Evolution 9 5 191 193 doi 10 1016 0169 5347 94 90088 4 ISSN 0169 5347 PMID 21236818 Holmgren M Scheffer M 2010 Strong facilitation in mild environments the stress gradient hypothesis revisited Journal of Ecology 98 6 1269 1275 doi 10 1111 j 1365 2745 2010 01709 x S2CID 83827444 Hammarlund Sarah P Harcombe William R 2019 07 18 Refining the stress gradient hypothesis in a microbial community Proceedings of the National Academy of Sciences 116 32 15760 15762 Bibcode 2019PNAS 11615760H doi 10 1073 pnas 1910420116 ISSN 0027 8424 PMC 6690025 PMID 31320585 Adams Amy E Besozzi Elizabeth M Shahrokhi Golya Patten Michael A 2021 11 13 A case for associational resistance Apparent support for the stress gradient hypothesis varies with study system Ecology Letters 25 1 202 217 doi 10 1111 ele 13917 hdl 11250 2833572 ISSN 1461 023X PMID 34775662 S2CID 244115652 nbsp This ecology related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Stress gradient hypothesis amp oldid 1209820257, wikipedia, wiki, book, books, library,
