气候变化领域集成服务门户(CCPortal): Understanding Diatoms’ Past and Future Biogeochemical Role in High-Latitude Seas

CCPortal

DOI	10.1029/2019GL085602
	Understanding Diatoms’ Past and Future Biogeochemical Role in High-Latitude Seas
	Krause J.W.; Lomas M.W.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:1
英文摘要	Because cold-water diatoms’ baseline elemental density (BED) is substantially higher than temperate diatoms, previous polar studies may have underestimated diatoms’ contribution to elemental standing stocks, contribution to particulate organic carbon (POC) export and incorrectly modeled their susceptibility to future warming. We apply cold-water diatom allometry to Arctic field samples and derive diatom growth rates ranging from 0.01–0.68 day−1, versus unrealistically high rates estimated using temperate diatom allometry. Reanalysis of published Southern Ocean data (Antarctic Environment and Southern Ocean Process Study and European Iron Fertilization Experiment) shows that diatom POC was significantly underestimated and diatoms could have accounted for a majority of POC export. However, during some field programs (Kerguelen Plateau), temperate allometry properly accounted for diatom biomass. We also predict that warming sea surface temperature may alter high-latitude diatom BED, suggesting that even if abundances do not change with warming, the reduced diatom BED will likely lower the trophic-transfer efficiency and their total carbon flow to consumers. ©2019. American Geophysical Union. All Rights Reserved.
英文关键词	Biogeochemistry; Climate change; Oceanography; Organic carbon; Surface waters; allometry; Diatoms; Iron fertilization; Kerguelen plateau; Particulate organic carbon; Sea surface temperature (SST); Standing stocks; Trophic transfer efficiencies; Phytoplankton; allometry; baseline conditions; biogeochemistry; diatom; global warming; paleoceanography; particulate organic carbon; polar region; sea surface temperature; Arctic; Indian Ocean; Kerguelen Plateau; Southern Ocean; Bacillariophyta
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170856
作者单位	Dauphin Island Sea Lab, Dauphin Island, AL, United States; Department of Marine Sciences, University of South Alabama, Mobile, AL, United States; Bigelow Laboratory for Ocean Sciences, East Boothbay, ME, United States
推荐引用方式 GB/T 7714	Krause J.W.,Lomas M.W.. Understanding Diatoms’ Past and Future Biogeochemical Role in High-Latitude Seas[J],2020,47(1).
APA	Krause J.W.,&Lomas M.W..(2020).Understanding Diatoms’ Past and Future Biogeochemical Role in High-Latitude Seas.Geophysical Research Letters,47(1).
MLA	Krause J.W.,et al."Understanding Diatoms’ Past and Future Biogeochemical Role in High-Latitude Seas".Geophysical Research Letters 47.1(2020).