Baumann, Hannes; Conover, David O (2011): Thermal reaction norms of growth in Atlantic and Pacific silverside fishes [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.773233, Supplement to: Baumann, H; Conover, DO (2011): Adaptation to climate change: contrasting patterns of reaction-norm-evolution in Pacific versus Atlantic silversides. Proceedings of the Royal Society B-Biological Sciences, 278(1716), 2265-2273, https://doi.org/10.1098/rspb.2010.2479
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Abstract:
How organisms may adapt to rising global temperatures is uncertain, but concepts can emerge from studying adaptive physiological trait variations across existing spatial climate gradients. Many ectotherms, particularly fish, have evolved increasing genetic growth capacities with latitude (i.e. countergradient variation (CnGV) in growth), which are thought to be an adaptation primarily to strong gradients in seasonality. In contrast, evolutionary responses to gradients in mean temperature are often assumed to involve an alternative mode, 'thermal adaptation'. We measured thermal growth reaction norms in Pacific silverside populations (Atherinops affinis) occurring across a weak latitudinal temperature gradient with invariant seasonality along the North American Pacific coast. Instead of thermal adaptation, we found novel evidence for CnGV in growth, suggesting that CnGV is a ubiquitous mode of reaction-norm evolution in ectotherms even in response to weak spatial and, by inference, temporal climate gradients. A novel, large-scale comparison between ecologically equivalent Pacific versus Atlantic silversides (Menidia menidia) revealed how closely growth CnGV patterns reflect their respective climate gradients. While steep growth reaction norms and increasing growth plasticity with latitude in M. menidia mimicked the strong, highly seasonal Atlantic coastal gradient, shallow reaction norms and much smaller, latitude-independent growth plasticity in A. affinis resembled the weak Pacific latitudinal temperature gradient.
Related to:
Conover, David O; Present, Theresa M C (1990): Countergradient variation in growth rate: compensation for length of the growing season among Atlantic silversides from different latitudes. Oecologia, 83(3), 316-324, https://doi.org/10.1007/BF00317554
Coverage:
Median Latitude: 37.539752 * Median Longitude: -105.908263 * South-bound Latitude: 28.250000 * West-bound Longitude: -124.200000 * North-bound Latitude: 44.170000 * East-bound Longitude: -65.700000
Date/Time Start: 1987-01-01T00:00:00 * Date/Time End: 2009-01-01T00:00:00
Comment:
These data are the basis for Baumann & Conover's paper in PRSB, showing that fish populations from different latitudes along both the North-American Pacific and Atlantic coasts have evolved local adapations in growth capacity, with thermal reaction norm patterns that mimic the strength and shape of each latitudinal gradient.
By studying adapations of organisms across existing spatial climate gradients, the authors argue, we can develop a better conceptual understanding of the impending adaptation to climate gradient in time, such as global climate change.
For interpretation of the data see Figure 4 hdl:10013/epic.38569.d001
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets
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Datasets listed in this publication series
- Baumann, H; Conover, DO (2012): Thermal reaction norms of growth capacity in Atherinops affinis and Menidia menidia (Atherinopsidae) determined by common garden experiments in 2008-2009. https://doi.org/10.1594/PANGAEA.773262
- Baumann, H; Conover, DO (2011): Thermal reaction norms of growth effciency in Atherinops affinis and Menidia menidia (Atherinopsidae) determined by common garden experiments in 2008-2009. https://doi.org/10.1594/PANGAEA.773230