气候变化领域集成服务门户(CCPortal): Seawater carbonate chemistry and biomarker pigments and phytoplankton community composition in different biogeochemical regions of the Southern Ocean

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.888447
	Seawater carbonate chemistry and biomarker pigments and phytoplankton community composition in different biogeochemical regions of the Southern Ocean
	Endo; H; Hattori; Hiroshi; Mishima; Tsubasa; Hashida; Gen; Sasaki; H; Nishioka; Jun; Suzuki; Koji
发布日期	2018-04-12
数据集类型	dataset
英文关键词	Antarctic ; Biomass/Abundance/Elemental composition ; Bottles or small containers/Aquaria ( 20 L) ; Community composition and diversity ; Entire community ; Inorganic toxins ; Laboratory experiment ; Open ocean ; Pelagos ; Polar ; Primary production/Photosynthesis ; Temperate
英文简介	The ongoing rise in atmospheric CO2 concentration is causing rapid increases in seawater pCO2levels. However, little is known about the potential impacts of elevated CO2 availability on the phytoplankton assemblages in the Southern Ocean's oceanic regions. Therefore, we conducted four incubation experiments using surface seawater collected from the subantarctic zone (SAZ) and the subpolar zone (SPZ) in the Australian sector of the Southern Ocean during the austral summer of 2011-2012. For incubations, FeCl3 solutions were added to reduce iron (Fe) limitation for phytoplankton growth. Ambient and high (~750 µatm) CO2 treatments were then prepared with and without addition of CO2-saturated seawater, respectively. Non-Fe-added (control) treatments were also prepared to assess the effects of Fe enrichment (overall, control, Fe-added, and Fe-and-CO2-added treatments). In the initial samples, the dominant phytoplankton taxa shifted with latitude from haptophytes to diatoms, likely reflecting silicate availability in the water. Under Fe-enriched conditions, increased CO2 level significantly reduced the accumulation of biomarker pigments in haptophytes in the SAZ and AZ, whereas a significant decrease in diatom markers was only detected in the SAZ. The CO2-related changes in phytoplankton community composition were greater in the SAZ, most likely due to the decrease in coccolithophore biomass. Our results suggest that an increase in CO2, if it coincides with Fe enrichment, could differentially affect the phytoplankton community composition in different geographical regions of the Southern Ocean, depending on the locally dominant taxa and environmental conditions.
空间范围	Median Latitude: -57.087500 * Median Longitude: 124.533333 * South-bound Latitude: -64.350000 * West-bound Longitude: 110.000000 * North-bound Latitude: -45.000000 * East-bound Longitude: 140.050000
时间范围	2011-12-30T00:00:00 - 2012-01-27T00:00:00
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/216250
推荐引用方式 GB/T 7714	Endo,H,Hattori,et al. Seawater carbonate chemistry and biomarker pigments and phytoplankton community composition in different biogeochemical regions of the Southern Ocean.2018-04-12.https://doi.org/10.1594/PANGAEA.888447.