气候变化领域集成服务门户(CCPortal): Results from a stable isotope tracer experiment in Potter Cove, King George Island, Antarctica

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.811380
	Results from a stable isotope tracer experiment in Potter Cove, King George Island, Antarctica
	Pasotti; Francesca; De Troch; Marleen; Raes; Maarten; Vanreusel; Ann
发布日期	2012-05-07
数据集类型	dataset
英文简介	Antarctic meiofauna is still strongly understud- ied, and so is its trophic position in the food web. Primary producers, such as phytoplankton, and bacteria may repre- sent important food sources for shallow water metazoans, and the role of meiobenthos in the benthic-pelagic coupling represents an important brick for food web understanding. In a laboratory, feeding experiment 13C-labeled freeze- dried diatoms (Thalassiosira weissflogii) and bacteria were added to retrieved cores from Potter Cove (15-m depth, November 2007) in order to investigate the uptake of 3 main meiofauna taxa: nematodes, copepods and cumaceans. In the surface sediment layers, nematodes showed no real difference in uptake of both food sources. This outcome was supported by the natural delta 13C values and the community genus composition. In the first centimeter layer, the dominant genus was Daptonema which is known to be opportunistic, feeding on both bacteria and diatoms. Copepods and cumaceans on the other hand appeared to feed more on diatoms than on bacteria. This may point at a better adaptation to input of primary production from the water column. On the other hand, the overall carbon uptake of the given food sources was quite low for all taxa, indicating that likely other food sources might be of relevance for these meiobenthic organisms. Further studies are needed in order to better quantify the carbon requirements of these organisms.
空间范围	Latitude: -62.223000 * Longitude: -58.644000
时间范围	2007-11-15T00:00:00 - 2007-11-15T00:00:00
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/215527
推荐引用方式 GB/T 7714	Pasotti,Francesca,De Troch,et al. Results from a stable isotope tracer experiment in Potter Cove, King George Island, Antarctica.2012-05-07.https://doi.org/10.1594/PANGAEA.811380.