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Late Quaternary chironomid community structure shaped by rate and magnitude of climate change.

Mayfield, R.J., Langdon, P.G., Doncaster, C.P., Dearing, J.A., Wang, R., Velle, G., Davies, K. and Brooks, S.J., 2021. Late Quaternary chironomid community structure shaped by rate and magnitude of climate change. Journal of Quaternary Science, 36 (3), 360 - 376.

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DOI: 10.1002/jqs.3301

Abstract

Much is known about how climate change impacts ecosystem richness and turnover, but we have less understanding of its influence on ecosystem structures. Here, we use ecological metrics (beta diversity, compositional disorder and network skewness) to quantify the community structural responses of temperature-sensitive chironomids (Diptera: Chironomidae) during the Late Glacial (14 700–11 700 cal a bp) and Holocene (11 700 cal a bp to present). Analyses demonstrate high turnover (beta diversity) of chironomid composition across both epochs; however, structural metrics stayed relatively intact. Compositional disorder and skewness show greatest structural change in the Younger Dryas, following the rapid, high-magnitude climate change at the Bølling–Allerød to Younger Dryas transition. There were fewer climate-related structural changes across the early to mid–late Holocene, where climate change was more gradual and lower in magnitude. The reduced impact on structural metrics could be due to greater functional resilience provided by the wider chironomid community, or to the replacement of same functional-type taxa in the network structure. These results provide insight into how future rapid climate change may alter chironomid communities and could suggest that while turnover may remain high under a rapidly warming climate, community structural dynamics retain some resilience.

Item Type:Article
ISSN:0267-8179
Additional Information:Research Funding Natural Environment Research Council. Grant Number: NE/L002531/1 Research Council of Norway. Grant Number: 250963/F20
Uncontrolled Keywords:beta diversity; chironomids; community structure; compositional disorder; network skewness
Group:Faculty of Science & Technology
ID Code:35376
Deposited By: Unnamed user with email symplectic@symplectic
Deposited On:12 Apr 2021 10:19
Last Modified:15 Aug 2021 08:28

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