气候变化领域集成服务门户(CCPortal): Seawater carbon chemistry and net primary production and net calcification in coral reef communities

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.878281
	Seawater carbon chemistry and net primary production and net calcification in coral reef communities
	Comeau; Steeve; Edmunds; Peter J; Lantz; Coulson A; Carpenter; Robert C
发布日期	2017-07-27
数据集类型	dataset
英文关键词	Benthos ; Calcification/Dissolution ; Coast and continental shelf ; Containers and aquaria (20- 1000 L or &lt ; 1 m**2) ; Entire community ; Laboratory experiment ; North Pacific ; Primary production/Photosynthesis ; Rocky-shore community ; South Pacific ; Tropical
英文简介	The threat represented by ocean acidification (OA) for coral reefs has received considerable attention because of the sensitivity of calcifiers to changing seawater carbonate chemistry. However, most studies have focused on the organismic response of calcification to OA, and only a few have addressed community-level effects, or investigated parameters other than calcification, such as photosynthesis. Light (photosynthetically active radiation, PAR) is a driver of biological processes on coral reefs, and the possibility that these processes might be perturbed by OA has important implications for community function. Here we investigate how CO2 enrichment affects the relationships between PAR and community net O2 production (Pnet), and between PAR and community net calcification (Gnet), using experiments on three coral communities constructed to match (i) the back reef of Mo'orea, French Polynesia, (ii) the fore reef of Mo'orea, and (iii) the back reef of O'ahu, Hawaii. The results were used to test the hypothesis that OA affects the relationship between Pnet and Gnet. For the three communities tested, pCO2 did not affect the Pnet-PAR relationship, but it affected the intercept of the hyperbolic tangent curve fitting the Gnet-PAR relationship for both reef communities in Mo'orea (but not in O'ahu). For the three communities, the slopes of the linear relationships between Pnet and Gnet were not affected by OA, although the intercepts were depressed by the inhibitory effect of high pCO2 on Gnet. Our result indicates that OA can modify the balance between net calcification and net photosynthesis of reef communities by depressing community calcification, but without affecting community photosynthesis.
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/216449
推荐引用方式 GB/T 7714	Comeau,Steeve,Edmunds,et al. Seawater carbon chemistry and net primary production and net calcification in coral reef communities.2017-07-27.https://doi.org/10.1594/PANGAEA.878281.