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• W2018674768 abstract "CR Climate Research Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsSpecials CR 37:149-163 (2008) - DOI: https://doi.org/10.3354/cr00760 Vulnerability of Antarctic shelf biodiversity to predicted regional warming David K. A. Barnes*, Lloyd S. Peck British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge CB3 0ET, UK *Email: dkab@bas.ac.uk ABSTRACT: Predictions of sensitivity to climate change of polar benthos vary markedly depending on whether physiological or ecological/biodiversity criteria are considered. A realistic consensus view must be achieved as soon as possible. Having been very cool and constant for several million years, polar hotspots such as the Antarctic Peninsula (AP) are now rapidly warming. The current rate of CO2 increase and, with a lag phase, temperature, is unparalleled—maybe for 10s of millions of years. Experimental evidence suggests the shallow mega- and macrobenthos is very sensitive to temperature change (stenothermal). Being warmed to about 10°C kills most species tested to date but even smaller experimental rises (just 2 or 3°C above normal) drastically hinders their ability to perform critical functions, such as predator avoidance behaviour. In contrast, new evidence of bathymetric and geographic distributions shows species ranges encompass localities with varying and warmer temperatures such as the intertidal zone or the shelf of South Georgia. This suggests, at the species level, an unexpected ability to live in areas with significantly different and raised temperature regimes. Scientists have focused on potential responses of a few species in a few areas. However, these are often atypical of fauna on the whole. Distribution assessments suffer from not knowing the capacity differences between populations and how fast they arise. To begin meaningful estimates of how shelf mega- and macrobenthos will respond to rapid warming, where and at what should we be looking? The AP continental shelf is probably amongst the most sensitive. A more widespread evaluation of the capabilities of different species and across life-history cycles is needed. We need to compare differences between communities in the more temperature-variable and -stable sites to predict ecological scale responses to future changes. KEY WORDS: Ecology · Physiology · Polar ectotherm · Climate change · Acclimation · Macrobenthos · Distribution · Temperature limit Full text in pdf format PreviousNextCite this article as: Barnes DKA, Peck LS (2008) Vulnerability of Antarctic shelf biodiversity to predicted regional warming. Clim Res 37:149-163. https://doi.org/10.3354/cr00760 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in CR Vol. 37, No. 2-3. Online publication date: October 16, 2008 Print ISSN: 0936-577X; Online ISSN: 1616-1572 Copyright © 2008 Inter-Research." @default.
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• W2018674768 title "Vulnerability of Antarctic shelf biodiversity to predicted regional warming" @default.
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• W2018674768 doi "https://doi.org/10.3354/cr00760" @default.
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