气候变化领域集成服务门户(CCPortal): Pteropod sedimentation at AWI HAUSGARTEN at two different sites from 2004 to 2011

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.845918
	Pteropod sedimentation at AWI HAUSGARTEN at two different sites from 2004 to 2011
	Busch; Kathrin; Bauerfeind; Eduard; Nöthig; Eva-Maria
发布日期	2015-05-01
数据集类型	dataset
英文简介	Pteropods are important organisms in high-latitude ecosystems, and they are expected to severely suffer from climate change in the near future. In this study, sedimentation patterns of two pteropod species, the polar Limacina helicina and the subarctic boreal L. retroversa, are presented. Time series data received by moored sediment traps at the Long-Term Ecological Research (LTER) Observatory HAUSGARTEN in eastern Fram Strait were analyzed during the years 2008 to 2012. Results were derived from four different deployment depths (~200, 1,250, 2,400, and 2,550 m) at two different sites (79° N, 04°20' E; 79°43' N, 04°30' E). A species-specific sedimentation pattern was present at all depths and at both sites showing maximal flux rates during September/October for L. helicina and in November/December for L. retroversa. The polar L. helicina was outnumbered by L. retroversa (55-99 %) at both positions and at all depths supporting the recently observed trend toward the dominance of the subarctic boreal species. The largest decrease in pteropod abundance occurred within the mesopelagic zone (~200-1,250 m), indicating loss via microbial degradation and grazing. Pteropod carbonate (aragonite) amounted up to ~75 % of the total carbonate flux at 200 m and 2-13 % of the aragonite found in the shallow traps arrived at the deep sediment traps (~160 m above the seafloor), revealing the significance of pteropods in carbonate export at Fram Strait. Our results emphasize the relevance and the need for continuation of long-term studies to detect and trace changes in pteropod abundances and community composition and thus in the vertical transport of aragonite.
空间范围	Median Latitude: 79.374858 * Median Longitude: 4.499942 * South-bound Latitude: 79.078000 * West-bound Longitude: 4.092000 * North-bound Latitude: 79.739300 * East-bound Longitude: 5.164500
时间范围	2004-07-15T00:00:00 - 2011-06-30T00:00:00
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/215456
推荐引用方式 GB/T 7714	Busch,Kathrin,Bauerfeind,et al. Pteropod sedimentation at AWI HAUSGARTEN at two different sites from 2004 to 2011.2015-05-01.https://doi.org/10.1594/PANGAEA.845918.