气候变化领域集成服务门户(CCPortal): Seawater carbon chemistry and calcification,carbonic anhydrase activity of cold-water coral Lophelia pertusa

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DOI	https://doi.org/10.1594/PANGAEA.877984
	Seawater carbon chemistry and calcification,carbonic anhydrase activity of cold-water coral Lophelia pertusa
	Kurman; Melissa; Gómez; C E; Georgian; Samuel E; Lunden; Jay J; Cordes; Erik E
发布日期	2017-07-20
数据集类型	dataset
英文关键词	Animalia ; Benthic animals ; Benthos ; Calcification/Dissolution ; Cnidaria ; Containers and aquaria (20- 1000 L or &lt ; 1 m**2) ; Deep-sea ; Laboratory experiment ; Lophelia pertusa ; North Atlantic ; Single species ; Temperate
英文简介	Ocean acidification, the decrease in seawater pH due to the absorption of atmospheric CO2, profoundly threatens the survival of a large number of marine species. Cold-water corals are considered to be among the most vulnerable organisms to ocean acidification because they are already exposed to relatively low pH and corresponding low calcium carbonate saturation states (Omega). Lophelia pertusa is a globally distributed cold-water scleractinian coral that provides critical three-dimensional habitat for many ecologically and economically significant species. In this study, four different genotypes of L. pertusa were exposed to three pH treatments (pH=7.60, 7.75, and 7.90) over a short (two-week) experimental period, and six genotypes were exposed to two pH treatments (pH=7.60, and 7.90) over a long (six-month) experimental period. Their physiological response was measured as net calcification rate and the activity of carbonic anhydrase, a key enzyme in the calcification pathway. In the short-term experiment, net calcification rates did not significantly change with pH, although they were highly variable in the low pH treatment, including some genotypes that maintained positive net calcification in undersaturated conditions. In the six-month experiment, average net calcification was significantly reduced at low pH, with corals exhibiting net dissolution of skeleton. However, one of the same genotypes that maintained positive net calcification (+0.04% day-1) under the low pH treatment in the short-term experiment also maintained positive net calcification longer than the other genotypes in the long-term experiment, although none of the corals maintained positive calcification for the entire 6 months. Average carbonic anhydrase activity was not affected by pH, although some genotypes exhibited small, insignificant, increases in activity after the sixth month. Our results suggest that while net calcification in L. pertusa is adversely affected by ocean acidification in the long term, it is possible that some genotypes may prove to be more resilient than others, particularly to short perturbations of the carbonate system. These results provide evidence that populations of L. pertusa in the Gulf of Mexico may contain the genetic variability necessary to support an adaptive response to future ocean acidification.
空间范围	Median Latitude: 29.168128 * Median Longitude: -88.017670 * South-bound Latitude: 29.156100 * West-bound Longitude: -88.019000 * North-bound Latitude: 29.173000 * East-bound Longitude: -88.015000
时间范围	2014-08-19T00:00:00 - 2014-09-02T00:00:00
语种	英语
国家	国际
学科大类	气候变化
学科子类	气候变化
文献类型	数据集
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/216459
推荐引用方式 GB/T 7714	Kurman,Melissa,Gómez,et al. Seawater carbon chemistry and calcification,carbonic anhydrase activity of cold-water coral Lophelia pertusa.2017-07-20.https://doi.org/10.1594/PANGAEA.877984.