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学科主题: Environmental Sciences & Ecology; Marine & Freshwater Biology; Oceanography
题名: NUTRIENT LIMITATIONS, MICROBIAL FOOD WEBS, AND BIOLOGICAL C-PUMPS - SUGGESTED INTERACTIONS IN A P-LIMITED MEDITERRANEAN
作者: THINGSTAD, TF ; RASSOULZADEGAN, F
关键词: PHOSPHORUS LIMITATION ; MICROBIAL FOOD WEBS ; CARBON CYCLES ; MARINE BIOGEOCHEMISTRY
刊名: MARINE ECOLOGY-PROGRESS SERIES
发表日期: 1995-01-01
卷: 117, 期:1-3, 页:299-306
部门归属: STN ZOOL,F-06230 VILLEFRANCHE MER,FRANCE
英文摘要: In light of evidence suggesting that both phytoplankton and bacteria in the Mediterranean Sea are limited by the availability of phosphorus rather than of nitrogen, and that most of the P in the photic zone during summer stratification exists as dissolved organic compounds (DOP), we address the question of how these observations may interact with the 'biological pump' transporting carbon to deep waters. From theoretical considerations, the C storage via sinking particles should function better in a P- than in an N-limited system. It is argued, however, that the microbial food web during summer stratification has a net accumulation of dissolved organic carbon (DOG) and DOP. The limited data available suggest a high DOC:DOP value which would make downwards transport of DOC with winter deep water formation a potentially effective mechanism in C sequestration from the atmosphere. Part of the DOC accumulating in the photic zone appears to be readily biodegradable. This is in conflict with a simple model of phytoplankton-bacterial competition for phosphate since phytoplankton, as an inferior competitor, would be expected to be reduced in biomass until autochthonous production of organic C falls to a level where bacteria become C-limited. The conflict is resolved by including microzooplankton grazing as a controlling factor of bacterial biomass.
语种: 英语
原文出处: 查看原文
内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/9290
Appears in Collections:海洋微食物网高被引文献_期刊论文

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THINGSTAD, TF; RASSOULZADEGAN, F.NUTRIENT LIMITATIONS, MICROBIAL FOOD WEBS, AND BIOLOGICAL C-PUMPS - SUGGESTED INTERACTIONS IN A P-LIMITED MEDITERRANEAN,MARINE ECOLOGY-PROGRESS SERIES,1995,117(1-3):299-306
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文件名: NUTRIENT LIMITATIONS, MICROBIAL FOOD WEBS, AND BIOLOGICAL C-PUMPS - SUGGESTED INTERACTIONS IN A P-LIMITED MEDITERRANEAN.pdf
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