气候变化领域集成服务门户(CCPortal): Seawater carbonate chemistry and Calcium carbonate (CaCO3) sediment dissolution

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.880536
	Seawater carbonate chemistry and Calcium carbonate (CaCO3) sediment dissolution
	Lantz; Coulson A; Carpenter; Robert C; Edmunds; Peter J
发布日期	2017-09-12
数据集类型	dataset
英文关键词	Benthos ; Calcification/Dissolution ; Coast and continental shelf ; Entire community ; Laboratory experiment ; Macro-nutrients ; Mesocosm or benthocosm ; Rocky-shore community ; South Pacific ; Tropical
英文简介	Ocean acidification (OA), attributed to the sequestration of atmospheric carbon dioxide (CO2) into the surface ocean, and coastal eutrophication, attributed in part to land-use change and terrestrial runoff of fertilizers, have received recent attention in an experimental framework examining the effects of each on coral reef net ecosystem calcification (Gnet). However, OA and eutrophication in conjunction have yet to receive attention from the perspective of coral reef sediment dissolution. To address this omission, CO2 and nitrate (NO3-) addition experiments were performed in Mo'orea, French Polynesia. Incubation chambers were used to measure sediment Gnet during the day and night under three different [NO3-] (0, 9.8, and 19.7 M) that were nested within four separate constructed coral reef communities maintained at different PCO2 levels (417, 721, 1030, and 1333 ?atm, respectively). PCO2 negatively affected sediment Gnetduring the day and night, resulting in a shift to diel net dissolution at a PCO2 of 1030 µatm. Elevated NO3- alone, and the combination of NO3- and PCO2, both negatively affected sediment Gnet at night. However, the response of Gnet to NO3- was less clear during the day, where diurnal sediment Gnet was enhanced under the combined treatment of elevated NO3- and PCO2, resulting in no net effect of NO3- on sediment Gnet on diel timescales. Overall, these results show that ocean acidification represents a greater threat to the balance of calcification and dissolution in Mo'orea's back reef sediment communities than the potential impact of NO3- enrichment on relatively short timescales.
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/216430
推荐引用方式 GB/T 7714	Lantz,Coulson A,Carpenter,et al. Seawater carbonate chemistry and Calcium carbonate (CaCO3) sediment dissolution.2017-09-12.https://doi.org/10.1594/PANGAEA.880536.