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Keystone predators govern the pathway and pace of climate impacts in a subarctic marine ecosystem
- Rasher, Douglas B. (author)
- Steneck, Robert S. (author)
- Halfar, Jochen (author)
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- Kroeker, Kristy J. (author)
- Ries, Justin B. (author)
- Tinker, M. Tim (author)
- Chan, Phoebe T. W. (author)
- Fietzke, Jan (author)
- Konar, Brenda H. (author)
- Lefcheck, Jonathan S. (author)
- Norley, Christopher J. D. (author)
- Weitzman, Benjamin P. (author)
- Westfield, Isaac T. (author)
- Estes, James A. (author)
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- (creator_code:org_t)
- American Association for the Advancement of Science, 2020
- 2020
- English.
- In: Science. - : American Association for the Advancement of Science. - 0036-8075 .- 1095-9203. ; 369:6509, s. 1351-1355
- Journal article (peer-reviewed)
Abstract
Subject headings
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- Predator loss and climate change are hallmarks of the Anthropocene yet their interactive effects are largely unknown. Here, we show that massive calcareous reefs, built slowly by the alga Clathromorphum nereostratum over centuries to millennia, are now declining because of the emerging interplay between these two processes. Such reefs, the structural base of Aleutian kelp forests, are rapidly eroding because of overgrazing by herbivores. Historical reconstructions and experiments reveal that overgrazing was initiated by the loss of sea otters, Enhydra lutris (which gave rise to herbivores capable of causing bioerosion), and then accelerated with ocean warming and acidification (which increased per capita lethal grazing by 34 to 60% compared with preindustrial times). Thus, keystone predators can mediate the ways in which climate effects emerge in nature and the pace with which they alter ecosystems.
Subject headings
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Klimatforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Climate Research (hsv//eng)
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