气候变化领域集成服务门户(CCPortal): Biogeochemical controls and feedbacks on ocean primary production

CCPortal

DOI	10.1126/science.281.5374.200
	Biogeochemical controls and feedbacks on ocean primary production
	Falkowski P.G.; Barber R.T.; Smetacek V.
发表日期	1998
ISSN	0036-8075
起始页码	200
结束页码	206
卷号	281 期号:5374
英文摘要	Changes in oceanic primary production, linked to changes in the network of global biogeochemical cycles, have profoundly influenced the geochemistry of Earth for over 3 billion years. In the contemporary ocean, photosynthetic carbon fixation by marine phytoplankton leads to formation of ~45 gigatons of organic carbon per annum, of which 16 gigatons are exported to the ocean interior. Changes in the magnitude of total and export production can strongly influence atmospheric CO2 levels (and hence climate) on geological time scales, as well as set upper bounds for sustainable fisheries harvest. The two fluxes are critically dependent on geophysical processes that determine mixed-layer depth, nutrient fluxes to and within the ocean, and food-web structure. Because the average turnover time of phytoplankton carbon in the ocean is on the order of a week or less, total and export production are extremely sensitive to external forcing and consequently are seldom in steady state. Elucidating the biogeochemical controls and feedbacks on primary production is essential to understanding how oceanic biota responded to and affected natural climatic variability in the geological past, and will respond to anthropogenically influenced changes in coming decades. One of the most crucial feedbacks results from changes in radiative forcing on the hydrological cycle, which influences the aeolian iron flux and, in turn, affects nitrogen fixation and primary production in the oceans.
英文关键词	chlorophyll; biogeochemical cycle; carbon fixation; phytoplankton; primary production; geography; oxygen supply; photosynthesis; plankton; priority journal; review; sea; cellular organisms
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/243652
作者单位	Inst. of Marine and Coastal Sciences, Rutgers University, New Brunswick, NJ 08901-8521, United States; Division of Earth and Ocean Sciences, Duke University, Beaufort, NC 28516, United States; Alfred Wegener Inst. Polar Mar. Res., Bremerhaven D-27570, Germany
推荐引用方式 GB/T 7714	Falkowski P.G.,Barber R.T.,Smetacek V.. Biogeochemical controls and feedbacks on ocean primary production[J],1998,281(5374).
APA	Falkowski P.G.,Barber R.T.,&Smetacek V..(1998).Biogeochemical controls and feedbacks on ocean primary production.Science,281(5374).
MLA	Falkowski P.G.,et al."Biogeochemical controls and feedbacks on ocean primary production".Science 281.5374(1998).