气候变化领域集成服务门户(CCPortal): Seawater carbonate chemistry and shell opacity of pteropod

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.908817
	Seawater carbonate chemistry and shell opacity of pteropod
	Oakes; Rosie L; Peck; Victoria L; Manno; C; Bralower; Timothy J
发布日期	2019-11-21
数据集类型	dataset
英文关键词	Animalia ; Antarctic ; Bottles or small containers/Aquaria ( 20 L) ; Calcification/Dissolution ; Laboratory experiment ; Limacina helicina antarctica ; Mollusca ; Nekton ; Open ocean ; Pelagos ; Single species ; Temperate
英文简介	The potential for preservation of thecosome pteropods is thought to be largely governed by the chemical stability of their delicate aragonitic shells in seawater. However, sediment trap studies have found that significant carbonate dissolution can occur above the carbonate saturation horizon. Here we present the results from experiments conducted on two cruises to the Scotia Sea to directly test whether the breakdown of the organic pteropod body influences shell dissolution. We find that, on the timescales of three to thirteen days, the oxidation of organic matter within the shells of dead pteropods is a stronger driver of shell dissolution than the saturation state of seawater. Three to four days after death, shells became milky white and nano‐SEM images reveal smoothing of internal surface features and increased shell porosity, both indicative of aragonite dissolution. These findings have implications for the interpretation of the condition of pteropod shells from sediment traps and the fossil record, as well as for understanding the processes controlling particulate carbonate export from the surface ocean.
空间范围	Median Latitude: -54.501515 * Median Longitude: -40.728600 * South-bound Latitude: -55.191290 * West-bound Longitude: -41.345530 * North-bound Latitude: -53.811740 * East-bound Longitude: -40.111670
时间范围	2013-12-03T00:00:00 - 2015-12-08T00:00:00
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/215712
推荐引用方式 GB/T 7714	Oakes,Rosie L,Peck,et al. Seawater carbonate chemistry and shell opacity of pteropod.2019-11-21.https://doi.org/10.1594/PANGAEA.908817.