Shifts of community composition and population density substantially affect ecosystem function despite invariant richness

Jurg W. Spaak, Jan M. Baert, Donald J. Baird, Nico Eisenhauer, Lorraine Maltby, Francesco Pomati, Viktoriia Radchuk, Jason R. Rohr, Paul J. Van den Brink, Frederik De Laender

Résultats de recherche: Contribution à un journal/une revueArticle

Résumé

There has been considerable focus on the impacts of environmental change on ecosystem function arising from changes in species richness. However, environmental change may affect ecosystem function without affecting richness, most notably by affecting population densities and community composition. Using a theoretical model, we find that, despite invariant richness, (1) small environmental effects may already lead to a collapse of function; (2) competitive strength may be a less important determinant of ecosystem function change than the selectivity of the environmental change driver and (3) effects on ecosystem function increase when effects on composition are larger. We also present a complementary statistical analysis of 13 data sets of phytoplankton and periphyton communities exposed to chemical stressors and show that effects on primary production under invariant richness ranged from −75% to +10%. We conclude that environmental protection goals relying on measures of richness could underestimate ecological impacts of environmental change.

langueAnglais
Pages1315-1324
Nombre de pages10
journalEcology Letters
Volume20
Numéro10
Les DOIs
étatPublié - 1 oct. 2017

Empreinte digitale

ecosystem function
community composition
environmental change
population density
ecosystems
effect
environmental impact
periphyton
ecological impact
environmental effect
primary production
environmental protection
statistical analysis
species richness
phytoplankton
chemical
primary productivity
species diversity

mots-clés

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    Spaak, Jurg W. ; Baert, Jan M. ; Baird, Donald J. ; Eisenhauer, Nico ; Maltby, Lorraine ; Pomati, Francesco ; Radchuk, Viktoriia ; Rohr, Jason R. ; Van den Brink, Paul J. ; De Laender, Frederik. / Shifts of community composition and population density substantially affect ecosystem function despite invariant richness. Dans: Ecology Letters. 2017 ; Vol 20, Numéro 10. p. 1315-1324
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    abstract = "There has been considerable focus on the impacts of environmental change on ecosystem function arising from changes in species richness. However, environmental change may affect ecosystem function without affecting richness, most notably by affecting population densities and community composition. Using a theoretical model, we find that, despite invariant richness, (1) small environmental effects may already lead to a collapse of function; (2) competitive strength may be a less important determinant of ecosystem function change than the selectivity of the environmental change driver and (3) effects on ecosystem function increase when effects on composition are larger. We also present a complementary statistical analysis of 13 data sets of phytoplankton and periphyton communities exposed to chemical stressors and show that effects on primary production under invariant richness ranged from −75\{%} to +10\{%}. We conclude that environmental protection goals relying on measures of richness could underestimate ecological impacts of environmental change.",
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    author = "Spaak, {Jurg W.} and Baert, {Jan M.} and Baird, {Donald J.} and Nico Eisenhauer and Lorraine Maltby and Francesco Pomati and Viktoriia Radchuk and Rohr, {Jason R.} and {Van den Brink}, {Paul J.} and {De Laender}, Frederik",
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    Spaak, JW, Baert, JM, Baird, DJ, Eisenhauer, N, Maltby, L, Pomati, F, Radchuk, V, Rohr, JR, Van den Brink, PJ & De Laender, F 2017, 'Shifts of community composition and population density substantially affect ecosystem function despite invariant richness' Ecology Letters, VOL 20, Numéro 10, p. 1315-1324. DOI: 10.1111/ele.12828

    Shifts of community composition and population density substantially affect ecosystem function despite invariant richness. / Spaak, Jurg W.; Baert, Jan M.; Baird, Donald J.; Eisenhauer, Nico; Maltby, Lorraine; Pomati, Francesco; Radchuk, Viktoriia; Rohr, Jason R.; Van den Brink, Paul J.; De Laender, Frederik.

    Dans: Ecology Letters, Vol 20, Numéro 10, 01.10.2017, p. 1315-1324.

    Résultats de recherche: Contribution à un journal/une revueArticle

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    AU - Baert,Jan M.

    AU - Baird,Donald J.

    AU - Eisenhauer,Nico

    AU - Maltby,Lorraine

    AU - Pomati,Francesco

    AU - Radchuk,Viktoriia

    AU - Rohr,Jason R.

    AU - Van den Brink,Paul J.

    AU - De Laender,Frederik

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