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Global warming benefits the small in aquatic ecosystems.

Abstract：

:Understanding the ecological impacts of climate change is a crucial challenge of the twenty-first century. There is a clear lack of general rules regarding the impacts of global warming on biota. Here, we present a metaanalysis of the effect of climate change on body size of ectothermic aquatic organisms (bacteria, phyto- and zooplankton, and fish) from the community to the individual level. Using long-term surveys, experimental data and published results, we show a significant increase in the proportion of small-sized species and young age classes and a decrease in size-at-age. These results are in accordance with the ecological rules dealing with the temperature-size relationships (i.e., Bergmann's rule, James' rule and Temperature-Size Rule). Our study provides evidence that reduced body size is the third universal ecological response to global warming in aquatic systems besides the shift of species ranges toward higher altitudes and latitudes and the seasonal shifts in life cycle events.

journal_name

Proc Natl Acad Sci U S A

journal_title

Proceedings of the National Academy of Sciences of the United States of America

authors

Daufresne M,Lengfellner K,Sommer U

doi

10.1073/pnas.0902080106

subject

Has Abstract

pub_date

2009-08-04 00:00:00

pages

12788-93

issue

31

eissn

0027-8424

issn

1091-6490

pii

0902080106

journal_volume

106

pub_type

杂志文章

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