气候变化领域集成服务门户(CCPortal): Total oxygen fluxes, and diatom density, diatom biomass and diversity of the diatom community in spring 2016 and environmental photosynthetically active radiation from 2015 and 2016 from three stations in Potter Cove, Antarctica

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.893276
	Total oxygen fluxes, and diatom density, diatom biomass and diversity of the diatom community in spring 2016 and environmental photosynthetically active radiation from 2015 and 2016 from three stations in Potter Cove, Antarctica
	Hoffmann; Ralf; Al-Handal; Adil Yousif; Wulff; Angela; Hasemann; Christiane; Braeckman; Ulrike; Deregibus; Dolores; Quartino; Maria Liliana; Zacher; Katharina; Holtappels; Moritz; Wenzhöfer; Frank
发布日期	2018-08-28
数据集类型	dataset
英文简介	The Antarctic Peninsula experiences a fast retreat of glaciers, which correlates with an increased release of particles and related increased sedimentation and thus, a decrease in the available light for benthic primary production. We investigated how changes in the general sedimentation and shading patterns affect the primary production by benthic microalgae, the microphytobenthos. In order to determine potential net primary production and respiration of the microphytobenthic community, sediment cores from locations exposed to different sedimentation rates and shading were exposed to photosynthetic active radiation (PAR, 400–700 nm) of 0–70 µmol photons m-2 s-1. Total oxygen fluxes and microphytobenthic diatom community structure, density, and biomass were determined. Our study revealed that the net primary production of the microphytobenthos decreased with increasing sedimentation and shading, while the microphytobenthic diatom density and composition remained similar. By comparing our experimental results with in situ measured PAR intensities, we furthermore assessed the microphytobenthic primary production as an important carbon source within Potter Cove's benthic ecosystem. We propose that the microphytobenthic contribution to the total primary production may drop drastically due to Antarctic glacial retreat and correlated sedimentation and shading, with yet unknown consequences for the benthic heterotrophic community, its structure, and diversity.
空间范围	Median Latitude: -62.228873 * Median Longitude: -58.654336 * South-bound Latitude: -62.235580 * West-bound Longitude: -58.662060 * North-bound Latitude: -62.225110 * East-bound Longitude: -58.641750
时间范围	2015-01-01T00:30:00 - 2016-12-11T00:00:00
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/215216
推荐引用方式 GB/T 7714	Hoffmann,Ralf,Al-Handal,et al. Total oxygen fluxes, and diatom density, diatom biomass and diversity of the diatom community in spring 2016 and environmental photosynthetically active radiation from 2015 and 2016 from three stations in Potter Cove, Antarctica.2018-08-28.https://doi.org/10.1594/PANGAEA.893276.