The structure and carbon demand of the bathyal benthic boundary layer community: a comparison of two oceanic locations in the NE-Atlantic

被引:16
作者
Christiansen, B [1 ]
Beckmann, W [1 ]
Weikert, H [1 ]
机构
[1] Univ Hamburg, Inst Hydrobiol & Fischereiwissensch, D-22765 Hamburg, Germany
关键词
D O I
10.1016/S0967-0645(00)00175-2
中图分类号
P7 [海洋学];
学科分类号
0707 ;
摘要
Estimates of standing stocks were used together with metabolic rates from literature to compare the structure and the respiratory carbon demand of the benthopelagic fauna and epibenthic megafauna at two oceanic locations in the northeast Atlantic. The total standing stock of the benthopelagic fauna and epibentic megafauna (in the following referred to as benthopelagos sensu latu) in the Iceland Basin (59 degreesN/20 degreesW) was 5 times higher than at the BIOTRANS site (West European Basin, 47 degreesN/20 degreesW). While fish were the predominating group at the northern location, followed by epibenthic megafauna, most of the biomass at the southern station could be attributed to epibenthic megafauna whereas fish were even surpassed by zooplankton. The overall respiratory carbon demand of the benthopelagos s.l. in the Iceland Basin was about 50% higher than at the BIOTRANS site. In both areas, a large fraction of the carbon was respired by the megafauna, accounting for 46 % of the total respiratory carbon demand in the Iceland Basin and 86% at the BIOTRANS site. Important consumers in the Iceland Basin were also zooplankton (27%) and fish (26%), whereas at the BIOTRANS site only zooplankton had a significant share (12%) besides megafauna. Compared to the carbon fluxes into the BBL, the faunal groups (without bacteria) remineralize ca. 10-20% of the sedimenting POC. If near-bottom pelagic bacteria are included, the fraction of the POC import flux remineralized by the benthopelagic community amounts to at least 20-50%. That means, the carbon flux as measured in sediment traps is not sufficient to fuel both the benthopelagic community including the megafauna plus the sediment community. (C) 2001 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:2409 / 2424
页数:16
相关论文
共 38 条
[1]   DISTRIBUTION OF SCAVENGING LYSIANASSIDAE AMPHIPODS EURYTHENES-GRYLLUS IN THE NORTHEAST ATLANTIC - COMPARISON WITH STUDIES HELD IN THE PACIFIC [J].
CHARMASSON, SS ;
CALMET, DP .
DEEP-SEA RESEARCH PART A-OCEANOGRAPHIC RESEARCH PAPERS, 1987, 34 (09) :1509-1523
[2]   The near-bottom zooplankton at the abyssal BIOTRANS site, northeast Atlantic:: composition, abundance and variability [J].
Christiansen, B ;
Drüke, B ;
Koppelmann, R ;
Weikert, H .
JOURNAL OF PLANKTON RESEARCH, 1999, 21 (10) :1847-1863
[3]   The IHF Fototrawl: Experiences with a television-controlled, deepsea epibenthic sledge [J].
Christiansen, B ;
Nuppenau, V .
DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS, 1997, 44 (03) :533-&
[5]   VERTICAL-DISTRIBUTION AND POPULATION-STRUCTURE OF THE NECROPHAGOUS AMPHIPOD EURYTHENES-GRYLLUS IN THE WEST EUROPEAN BASIN [J].
CHRISTIANSEN, B ;
PFANNKUCHE, O ;
THIEL, H .
MARINE ECOLOGY PROGRESS SERIES, 1990, 66 (1-2) :35-45
[6]  
CHRISTIANSEN B, 1992, NATO ASI SER, P125
[7]  
Conover R.J., 1978, Marine Ecology (London), V4, P221
[9]   MACROZOOPLANKTON BIOMASS IN A WARM-CORE GULF-STREAM RING - TIME-SERIES CHANGES IN SIZE STRUCTURE, TAXONOMIC COMPOSITION, AND VERTICAL-DISTRIBUTION [J].
DAVIS, CS ;
WIEBE, PH .
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 1985, 90 (NC5) :8871-8884
[10]   WHAT ADAPTIVE STRATEGIES PROMOTE IMMIGRATION AND SPECIATION IN DEEP-SEA ENVIRONMENT [J].
GEORGE, RY .
SARSIA, 1979, 64 (1-2) :61-65