气候变化领域集成服务门户(CCPortal): Physical oceanography in Potter Cove during 2011 to 2013

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.869350
	Physical oceanography in Potter Cove during 2011 to 2013
	Deregibus; Dolores; Quartino; Maria Liliana; Campana; Gabriela L; Momo; Fernando; Wiencke; Christian; Zacher; Katharina
发布日期	2016-12-12
数据集类型	dataset
英文简介	In Potter Cove, Antarctica, newly ice-free areas appeared due to glacial retreat. Simultaneously, the inflow of sediment increased, reducing underwater photosynthetically active radiation (PAR, 400-700 nm). The aim of this study was to determine the photosynthetic characteristics of two macroalgal species colonizing three newly ice-free areas, A1, A2 and A3, with increasing degree of glacial influence from A1 to A3. Turbidity, salinity and temperature were measured, and light attenuation coefficients (Kd) calculated and considered as a proxy for glacial sediment input. The lower depth distribution of the red alga Palmaria decipiens and the brown alga Himantothallus grandifolius was 10 m in A3, 20 m in A2 and 30 m in A1. Both species were then collected, at 5 and 10 m at all areas. Photosynthetic parameters and the daily metabolic carbon balance (CB) were determined. Kd was significantly higher in A3 compared with A1 and A2. The CB of P. decipiens was significantly higher in A1 followed by A2 and A3, and significantly higher at shallower than at greater depth. For H. grandifolius CB was significantly lower in A3 and in A2 at deeper depths compared with the rest of areas and depths. The lower distribution limit of the algae was positively correlated to the light penetration. An increase in the sediment run-off due to global warming might lead to an elevation of the lower depth distribution limit but retreating glaciers can open new space for macroalgal colonization. These changes will probably affect macroalgal primary productivity in Potter Cove with consequences for the coastal ecosystem.
空间范围	Median Latitude: -62.229112 * Median Longitude: -58.676533 * South-bound Latitude: -62.237920 * West-bound Longitude: -58.712280 * North-bound Latitude: -62.224850 * East-bound Longitude: -58.643320
时间范围	2010-03-18T00:00:00 - 2013-03-24T00:00:00
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/215364
推荐引用方式 GB/T 7714	Deregibus,Dolores,Quartino,et al. Physical oceanography in Potter Cove during 2011 to 2013.2016-12-12.https://doi.org/10.1594/PANGAEA.869350.