Climate-change effects on upland stream macroinvertebrates over a 25-year period
Climate change effects on some ecosystems are still poorly known, particularly where they interact with other climatic phenomena or stressors. We used data spanning 25 years (1981–2005) from temperate headwaters at Llyn Brianne (UK) to test three hypotheses: (1) stream macroinvertebrates vary with w...
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2007
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ftunivcardiff:oai:https://orca.cardiff.ac.uk:1209 2023-05-15T17:35:12+02:00 Climate-change effects on upland stream macroinvertebrates over a 25-year period Durance, Isabelle Ormerod, Stephen James 2007-05-01 https://orca.cardiff.ac.uk/id/eprint/1209/ https://doi.org/10.1111/j.1365-2486.2007.01340.x unknown Wiley-Blackwell Durance, Isabelle https://orca.cardiff.ac.uk/view/cardiffauthors/A016469X.html orcid:0000-0002-4138-3349 orcid:0000-0002-4138-3349 and Ormerod, Stephen James https://orca.cardiff.ac.uk/view/cardiffauthors/A035757Z.html orcid:0000-0002-8174-302X orcid:0000-0002-8174-302X 2007. Climate-change effects on upland stream macroinvertebrates over a 25-year period. Global Change Biology 13 (5) , pp. 942-957. 10.1111/j.1365-2486.2007.01340.x https://doi.org/10.1111/j.1365-2486.2007.01340.x doi:10.1111/j.1365-2486.2007.01340.x Article PeerReviewed 2007 ftunivcardiff https://doi.org/10.1111/j.1365-2486.2007.01340.x 2022-10-20T22:31:53Z Climate change effects on some ecosystems are still poorly known, particularly where they interact with other climatic phenomena or stressors. We used data spanning 25 years (1981–2005) from temperate headwaters at Llyn Brianne (UK) to test three hypotheses: (1) stream macroinvertebrates vary with winter climate; (2) ecological effects attributable to directional climate change and the North Atlantic Oscillation (NAO) are distinguishable and (3) climatic effects on macroinvertebrates depend on whether streams are impacted by acidification. Positive (i.e. warmer, wetter) NAO phases were accompanied by reduced interannual stability (=similarity) in macroinvertebrate assemblage in all streams, but associated variations in composition occurred only in acid moorland. The NAO and directional climate change together explained 70% of interannual variation in temperature, but forest and moorland streams warmed respectively by 1.4 and 1.7°C (P<0.001) between 1981 and 2005 after accounting for NAO effects. Significant responses among macroinvertebrates were confined to circumneutral streams, where future thermal projections (+1, +2, +3°C) suggested considerable change. Spring macroinvertebrate abundance might decline by 21% for every 1°C rise. Although many core species could persist if temperature gain reached 3°C, 4–10 mostly scarce taxa (5–12% of the species pool) would risk local extinction. Temperature increase in Wales approaches this magnitude by the 2050s under the Hadley HadCM3 scenarios. These results support all three hypotheses and illustrate how headwater stream ecosystems are sensitive to climate change. Altered composition and abundance could affect conservation and ecological function, with the NAO compounding climate change effects during positive phases. We suggest that acidification, in impacted streams, overrides climatic effects on macroinvertebrates by simplifying assemblages and reducing richness. Climatic processes might, nevertheless, exacerbate acidification or offset biological recovery. Article in Journal/Newspaper North Atlantic North Atlantic oscillation Cardiff University: ORCA (Online Research @ Cardiff) Global Change Biology 13 5 942 957 |
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Cardiff University: ORCA (Online Research @ Cardiff) |
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Climate change effects on some ecosystems are still poorly known, particularly where they interact with other climatic phenomena or stressors. We used data spanning 25 years (1981–2005) from temperate headwaters at Llyn Brianne (UK) to test three hypotheses: (1) stream macroinvertebrates vary with winter climate; (2) ecological effects attributable to directional climate change and the North Atlantic Oscillation (NAO) are distinguishable and (3) climatic effects on macroinvertebrates depend on whether streams are impacted by acidification. Positive (i.e. warmer, wetter) NAO phases were accompanied by reduced interannual stability (=similarity) in macroinvertebrate assemblage in all streams, but associated variations in composition occurred only in acid moorland. The NAO and directional climate change together explained 70% of interannual variation in temperature, but forest and moorland streams warmed respectively by 1.4 and 1.7°C (P<0.001) between 1981 and 2005 after accounting for NAO effects. Significant responses among macroinvertebrates were confined to circumneutral streams, where future thermal projections (+1, +2, +3°C) suggested considerable change. Spring macroinvertebrate abundance might decline by 21% for every 1°C rise. Although many core species could persist if temperature gain reached 3°C, 4–10 mostly scarce taxa (5–12% of the species pool) would risk local extinction. Temperature increase in Wales approaches this magnitude by the 2050s under the Hadley HadCM3 scenarios. These results support all three hypotheses and illustrate how headwater stream ecosystems are sensitive to climate change. Altered composition and abundance could affect conservation and ecological function, with the NAO compounding climate change effects during positive phases. We suggest that acidification, in impacted streams, overrides climatic effects on macroinvertebrates by simplifying assemblages and reducing richness. Climatic processes might, nevertheless, exacerbate acidification or offset biological recovery. |
format |
Article in Journal/Newspaper |
author |
Durance, Isabelle Ormerod, Stephen James |
spellingShingle |
Durance, Isabelle Ormerod, Stephen James Climate-change effects on upland stream macroinvertebrates over a 25-year period |
author_facet |
Durance, Isabelle Ormerod, Stephen James |
author_sort |
Durance, Isabelle |
title |
Climate-change effects on upland stream macroinvertebrates over a 25-year period |
title_short |
Climate-change effects on upland stream macroinvertebrates over a 25-year period |
title_full |
Climate-change effects on upland stream macroinvertebrates over a 25-year period |
title_fullStr |
Climate-change effects on upland stream macroinvertebrates over a 25-year period |
title_full_unstemmed |
Climate-change effects on upland stream macroinvertebrates over a 25-year period |
title_sort |
climate-change effects on upland stream macroinvertebrates over a 25-year period |
publisher |
Wiley-Blackwell |
publishDate |
2007 |
url |
https://orca.cardiff.ac.uk/id/eprint/1209/ https://doi.org/10.1111/j.1365-2486.2007.01340.x |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_relation |
Durance, Isabelle https://orca.cardiff.ac.uk/view/cardiffauthors/A016469X.html orcid:0000-0002-4138-3349 orcid:0000-0002-4138-3349 and Ormerod, Stephen James https://orca.cardiff.ac.uk/view/cardiffauthors/A035757Z.html orcid:0000-0002-8174-302X orcid:0000-0002-8174-302X 2007. Climate-change effects on upland stream macroinvertebrates over a 25-year period. Global Change Biology 13 (5) , pp. 942-957. 10.1111/j.1365-2486.2007.01340.x https://doi.org/10.1111/j.1365-2486.2007.01340.x doi:10.1111/j.1365-2486.2007.01340.x |
op_doi |
https://doi.org/10.1111/j.1365-2486.2007.01340.x |
container_title |
Global Change Biology |
container_volume |
13 |
container_issue |
5 |
container_start_page |
942 |
op_container_end_page |
957 |
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1766134282809507840 |