Supplementary material from "Cool-edge populations of the kelp Ecklonia radiata under global ocean change scenarios: strong sensitivity to ocean warming but little effect of ocean acidification" ...
Kelp forests are threatened by ocean warming, yet effects of co-occurring drivers such as CO 2 are rarely considered when predicting their performance in the future. In Australia, the kelp Ecklonia radiata forms extensive forests across seawater temperatures of approximately 7–26°C. Cool-edge popula...
Main Authors: | , , , , , , , |
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Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
The Royal Society
2023
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Subjects: | |
Online Access: | https://dx.doi.org/10.6084/m9.figshare.c.6991797.v1 https://rs.figshare.com/collections/Supplementary_material_from_Cool-edge_populations_of_the_kelp_i_Ecklonia_radiata_i_under_global_ocean_change_scenarios_strong_sensitivity_to_ocean_warming_but_little_effect_of_ocean_acidification_/6991797/1 |
Summary: | Kelp forests are threatened by ocean warming, yet effects of co-occurring drivers such as CO 2 are rarely considered when predicting their performance in the future. In Australia, the kelp Ecklonia radiata forms extensive forests across seawater temperatures of approximately 7–26°C. Cool-edge populations are typically considered more thermally tolerant than their warm-edge counterparts but this ignores the possibility of local adaptation. Moreover, it is unknown whether elevated CO 2 can mitigate negative effects of warming. To identify whether elevated CO 2 could improve thermal performance of a cool-edge population of E. radiata , we constructed thermal performance curves for growth and photosynthesis, under both current and elevated CO 2 (approx. 400 and 1000 µatm). We then modelled annual performance under warming scenarios to highlight thermal susceptibility. Elevated CO 2 had minimal effect on growth but increased photosynthesis around the thermal optimum. Thermal optima were approximately 16°C for ... |
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