Temperature-size responses match latitudinal-size clines in arthropods, revealing critical differences between aquatic and terrestrial species.
Volume
18
Pagination
327 - 335
Publisher
DOI
10.1111/ele.12413
Issue
ISSN
1461-023X
Metadata
Show full item recordAbstract
Two major intraspecific patterns of adult size variation are plastic temperature-size (T-S) responses and latitude-size (L-S) clines. Yet, the degree to which these co-vary and share explanatory mechanisms has not been systematically evaluated. We present the largest quantitative comparison of these gradients to date, and find that their direction and magnitude co-vary among 12 arthropod orders (r(2) = 0.72). Body size in aquatic species generally reduces with both warming and decreasing latitude, whereas terrestrial species have much reduced and even opposite gradients. These patterns support the prediction that oxygen limitation is a major controlling factor in water, but not in air. Furthermore, voltinism explains much of the variation in T-S and L-S patterns in terrestrial but not aquatic species. While body size decreases with warming and with decreasing latitude in multivoltine terrestrial arthropods, size increases on average in univoltine species, consistent with predictions from size vs. season-length trade-offs.
Authors
Horne, CR; Hirst, AG; Atkinson, DURI
http://qmro.qmul.ac.uk/xmlui/handle/123456789/6723http://onlinelibrary.wiley.com/doi/10.1111/ele.12413/abstract
http://qmro.qmul.ac.uk/xmlui/handle/123456789/9638