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Multidecadal changes in functional diversity lag behind the recovery of taxonomic diversity
Department of River Ecology and Conservation, Senckenberg Research Institute and Natural History Museum Frankfurt, Gelnhausen, Germany.
Umeå universitet, Humanistiska fakulteten, Institutionen för idé- och samhällsstudier, Miljöarkeologiska laboratoriet.ORCID-id: 0000-0003-1848-3154
Department of River Ecology and Conservation, Senckenberg Research Institute and Natural History Museum Frankfurt, Gelnhausen, Germany; Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, University of South Bohemia in České Budějovice, Vodňany, Czech Republic.
Department of Conservation and Research, Bavarian Forest National Park, Grafenau, Germany.
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2021 (Engelska)Ingår i: Ecology and Evolution, E-ISSN 2045-7758, Vol. 11, nr 23, s. 17471-17484Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

While there has been increasing interest in how taxonomic diversity is changing over time, less is known about how long-term taxonomic changes may affect ecosystem functioning and resilience. Exploring long-term patterns of functional diversity can provide key insights into the capacity of a community to carry out ecological processes and the redundancy of species’ roles. We focus on a protected freshwater system located in a national park in southeast Germany. We use a high-resolution benthic macroinvertebrate dataset spanning 32 years (1983–2014) and test whether changes in functional diversity are reflected in taxonomic diversity using a multidimensional trait-based approach and regression analyses. Specifically, we asked: (i) How has functional diversity changed over time? (ii) How functionally distinct are the community's taxa? (iii) Are changes in functional diversity concurrent with taxonomic diversity? And (iv) what is the extent of community functional redundancy? Resultant from acidification mitigation, macroinvertebrate taxonomic diversity increased over the study period. Recovery of functional diversity was less pronounced, lagging behind responses of taxonomic diversity. Over multidecadal timescales, the macroinvertebrate community has become more homogenous with a high degree of functional redundancy, despite being isolated from direct anthropogenic activity. While taxonomic diversity increased over time, functional diversity has yet to catch up. These results demonstrate that anthropogenic pressures can remain a threat to biotic communities even in protected areas. The differences in taxonomic and functional recovery processes highlight the need to incorporate functional traits in assessments of biodiversity responses to global change.

Ort, förlag, år, upplaga, sidor
John Wiley & Sons, 2021. Vol. 11, nr 23, s. 17471-17484
Nyckelord [en]
freshwater, functional diversity, functional redundancy, long term, long-term ecosystem research, macroinvertebrate, protected area
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Ekologi
Identifikatorer
URN: urn:nbn:se:umu:diva-190018DOI: 10.1002/ece3.8381ISI: 000721464500001Scopus ID: 2-s2.0-85119655166OAI: oai:DiVA.org:umu-190018DiVA, id: diva2:1615509
Tillgänglig från: 2021-11-30 Skapad: 2021-11-30 Senast uppdaterad: 2024-01-17Bibliografiskt granskad

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Pilotto, Francesca

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