期刊
JOURNAL OF EXPERIMENTAL MARINE BIOLOGY AND ECOLOGY
卷 509, 期 -, 页码 1-7出版社
ELSEVIER
DOI: 10.1016/j.jembe.2018.08.007
关键词
Magnesium calcite; Echinoid; Skeleton; Temperature; Climate change; Ocean acidification; Gulf of Mexico
资金
- UAB Department of Biology
- Endowed Professorship in Polar and Marine Biology
Shallow-water marine invertebrates living near the upper limits of their thermal tolerances are uniquely susceptible to climate warming. This is particularly the case for species that occur in geographic regions where larval dispersal or adult migration to cooler waters is not an option. This scenario aptly describes populations of the seagrass-associated sea urchin Lytechinus variegatus inhabiting the northern Gulf of Mexico where northward movement is restricted by a coastline. In the present study, we exposed juvenile L. variegatus to chronic ambient (26 degrees C) and predicted near-future (30 degrees C) temperature treatments for 90 days. X-ray Diffraction (XRD) was employed to determine the Mg/Ca ratios of the spines, test, and Aristotle's lantern of individuals sub-sampled at 30, 60, and 90 days. We found that while individuals grew at similar rates, Mg/Ca ratios in all skeletal components were overall significantly lower in individuals held at 30 degrees C than at 26 degrees C.
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