气候变化领域集成服务门户(CCPortal): Nonsinking Organic Matter Production in the California Current

CCPortal

DOI	10.1029/2018GB005930
	Nonsinking Organic Matter Production in the California Current
	Stephens B.M.; Porrachia M.; Dovel S.; Roadman M.; Goericke R.; Aluwihare L.I.
发表日期	2018
ISSN	0886-6236
EISSN	1944-9224
起始页码	1386
结束页码	1405
卷号	32 期号:9
英文摘要	Productive eastern boundary upwelling systems such as the California Current Ecosystem (CCE) are important regions for supporting both local and remote food webs. Several studies have reported on the temporal and spatial variability of primary production and gravitational export in the CCE. However, few studies have quantified the partitioning of net primary and new production into other reservoirs of detrital organic matter. This study tested the hypothesis that nonsinking detrital reservoirs are an exportable reservoir of new production in the CCE with samples collected by the California Cooperative Oceanic Fisheries Investigation survey between 2008 and 2010. Water column gradients in nitrate (NO3 −) and total organic carbon (TOC; which excludes sinking particulate organic carbon) were used to estimate potential rates of new production (PNew) and TOC production (PTOC), respectively. The PTOC:PNew varied between 0.16 and 0.56 and often increased with indicators of enhanced autotrophic production. At times, surface stratification was also correlated with elevated PTOC:PNew. In the most productive, inshore region, PTOC exceeded previously reported sinking export rates, which identified TOC as a quantitatively significant repository of exportable carbon in the CCE. However the sum of PTOC and sinking export for these productive regions was less than both PNew and oxygen-based estimates of net community production. These results imply that nonsinking reservoirs alone are not sufficient to explain observed imbalances between production and export for the most productive CCE regions. ©2018. American Geophysical Union. All Rights Reserved.
英文关键词	export production; new production; total organic carbon
语种	英语
来源期刊	Global Biogeochemical Cycles
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/129794
作者单位	Geosciences Research Division, Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA, United States; Now at Marine Science Institute, Department of Ecology, Evolution, and Marine Biology, University of California, Santa Barbara, CA, United States; Integrative Oceanography Division, Scripps Institution of Oceanography, University of California, San Diego, La Jolla, CA, United States
推荐引用方式 GB/T 7714	Stephens B.M.,Porrachia M.,Dovel S.,et al. Nonsinking Organic Matter Production in the California Current[J],2018,32(9).
APA	Stephens B.M.,Porrachia M.,Dovel S.,Roadman M.,Goericke R.,&Aluwihare L.I..(2018).Nonsinking Organic Matter Production in the California Current.Global Biogeochemical Cycles,32(9).
MLA	Stephens B.M.,et al."Nonsinking Organic Matter Production in the California Current".Global Biogeochemical Cycles 32.9(2018).