Proc Natl Acad Sci USA. Recent ecological responses to climate change support predictions of high extinction risk

Giuseppe · Jul 26, 2011

[Source: Proc Natl Acad Sci USA, full text: (LINK). Abstract, edited.]

Recent ecological responses to climate change support predictions of high extinction risk [Ecology]

Maclean, I. M. D., Wilson, R. J.

Predicted effects of climate change include high extinction risk for many species, but confidence in these predictions is undermined by a perceived lack of empirical support. Many studies have now documented ecological responses to recent climate change, providing the opportunity to test whether the magnitude and nature of recent responses match predictions. Here, we perform a global and multitaxon metaanalysis to show that empirical evidence for the realized effects of climate change supports predictions of future extinction risk. We use International Union for Conservation of Nature (IUCN) Red List criteria as a common scale to estimate extinction risks from a wide range of climate impacts, ecological responses, and methods of analysis, and we compare predictions with observations. Mean extinction probability across studies making predictions of the future effects of climate change was 7% by 2100 compared with 15% based on observed responses. After taking account of possible bias in the type of climate change impact analyzed and the parts of the world and taxa studied, there was less discrepancy between the two approaches: predictions suggested a mean extinction probability of 10% across taxa and regions, whereas empirical evidence gave a mean probability of 14%. As well as mean overall extinction probability, observations also supported predictions in terms of variability in extinction risk and the relative risk associated with broad taxonomic groups and geographic regions. These results suggest that predictions are robust to methodological assumptions and provide strong empirical support for the assertion that anthropogenic climate change is now a major threat to global biodiversity.

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Laidback Al · Jul 26, 2011

Re: Proc Natl Acad Sci USA. Recent ecological responses to climate change support predictions of high extinction risk

From the full article -

Given that climate change is expected to accelerate and hence, exacerbate impacts, empirical evidence suggests that many predictions of extinction risk may be somewhat conservative. . . . Our results lend support to the contention . . . that anthropogenic climate warming at least ranks alongside other recognized threats to global biodiversity.

. . . rapid climate change has the potential to overwhelm the capacity for adaptation in many populations, reducing the ability to resist and recover from other environmental stressors. Our metaanalysis showing high predicted levels of extinction, backed up by consistent data for changes that have already occurred, shows the need to give climate change high priority in conservation planning and to communicate its potentially wide-ranging consequences to policy makers and the wider public.

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[/FONT]Full text (no charge): http://uec.academia.edu/IlyaMaclean...e_support_predictions_of_high_extinction_risk

Proc Natl Acad Sci USA. Recent ecological responses to climate change support predictions of high extinction risk

Giuseppe

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Laidback Al

Well-known member