气候变化领域集成服务门户(CCPortal): Seawater carbonate chemistry and calcification and productivity of sporadic coral reef

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.908818
	Seawater carbonate chemistry and calcification and productivity of sporadic coral reef
	Davis; Kay L; McMahon; Ashly; Kelaher; Brendan P; Shaw; Emily; Santos; Isaac R
发布日期	2019-11-21
数据集类型	dataset
英文关键词	Benthos ; Calcification/Dissolution ; Coast and continental shelf ; Entire community ; Field observation ; Primary production/Photosynthesis ; Rocky-shore community ; South Pacific ; Temperate
英文简介	Estimates of coral reef ecosystem calcification (Gnet) and productivity (Pnet) provide insight into coral community health and functionality in response to short- and long-term stressors such as ocean warming and acidification. Here, we investigate spatial variability in calcification and organic production at One Tree Island (OTI) and compare our new observations to sporadic metabolic rates reported over the previous 50 years on the same reef flat. Gnet and Pnet estimates at the nearshore site were 50% and 166% lower than an offshore site with a shift in organic production from net productive to net respiratory. Contrary to expectations, calcification rates in 2017 (145.7 +- 20.2 mmol/m2/d) were comparable to the 1970s estimate (125.0 +- 12.5 mmol/m2/d) and 400% greater than similar observations in 2014. Our results indicate only weak associations between Gnet and aragonite (Omega ar). A local increase in coral cover from 18% in 2014 to 31% in 2017 was the likely driver of increased calcification. A steeper TA–DIC slope in 2017 demonstrates a greater control of calcification on seawater carbonate chemistry than prior years. Overall, these results highlight the importance of site selection and replication when comparing metabolic datasets, and demonstrate major short-term variability in metabolic rates. The predictive capabilities of ecosystem metabolism studies may be constrained by using the available short-term datasets to represent long-term calcification trends.
空间范围	Latitude: -23.507500 * Longitude: 152.089300
时间范围	2017-11-14T00:24:00 - 2017-11-28T09:45:00
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/215713
推荐引用方式 GB/T 7714	Davis,Kay L,McMahon,et al. Seawater carbonate chemistry and calcification and productivity of sporadic coral reef.2019-11-21.https://doi.org/10.1594/PANGAEA.908818.