Changes in the zooplankton community of the British Columbia continental margin, 1985-1999, and their covariation with oceanographic conditions

被引:189
作者
Mackas, DL [1 ]
Thomson, RE [1 ]
Galbraith, M [1 ]
机构
[1] Fisheries & Oceans Canada, Inst Ocean Sci, Sidney, BC V8L 4B2, Canada
关键词
D O I
10.1139/cjfas-58-4-685
中图分类号
S9 [水产、渔业];
学科分类号
0908 ;
摘要
A 15-year zooplankton time series collected off southern Vancouver Island (48-49 degreesN) shows large interannual anomalies of biomass for most major zooplankton species. Variations within groups of ecologically similar species have been more extreme (often 10-fold or greater) than the variation in total biomass (four- to six-fold). For both total biomass and species groups, the zooplankton anomalies develop and persist over time spans of several years and are correlated across a large spatial scale (> 100 km longshore). One dominant mode of recent zooplankton variation was a 1990-1998 cumulative shift to a more "southerly" copepod and chaetognath fauna: order-of-magnitude declines in several species endemic to the Northeast Pacific continental shelf and order-of-magnitude increases of species endemic to the California Current (35-45 degreesN). This trend abruptly reversed in 1999. A second major mode of zooplankton variability consisted of roughly mirror-image fluctuations in the abundance of euphausiids versus subarctic oceanic copepods. Zooplankton anomalies were correlated with year-to-year changes in several physical environmental indices. The patterns of covariance suggest that zooplankton community composition responds strongly to ocean climate fluctuations and in particular to changing current patterns.
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收藏
页码:685 / 702
页数:18
相关论文
共 36 条
[11]  
LU BW, 1999, THESIS U VICTORIA VI
[12]  
Mackas David L., 1995, Canadian Special Publication of Fisheries and Aquatic Sciences, V121, P603
[13]   Aggregation of euphausiids and Pacific hake (Merluccius productus) along the outer continental shelf off Vancouver Island [J].
Mackas, DL ;
Kieser, R ;
Saunders, M ;
Yelland, DR ;
Brown, RM ;
Moore, DF .
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES, 1997, 54 (09) :2080-2096
[14]   Horizontal flux of nutrients and plankton across and along the British Columbia continental margin [J].
Mackas, DL ;
Yelland, DR .
DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY, 1999, 46 (11-12) :2941-2967
[15]   SEASONAL CYCLE OF ZOOPLANKTON OFF SOUTHWESTERN BRITISH-COLUMBIA - 1979-89 [J].
MACKAS, DL .
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES, 1992, 49 (05) :903-921
[17]  
Mantua NJ, 1997, B AM METEOROL SOC, V78, P1069, DOI 10.1175/1520-0477(1997)078<1069:APICOW>2.0.CO
[18]  
2
[19]  
McFarlane GA, 1997, OCEANOL ACTA, V20, P191
[20]   Patterns of covariation in survival rates of British Columbian and Alaskan sockeye salmon (Oncorhynchus nerka) stocks [J].
Peterman, RM ;
Pyper, BJ ;
Lapointe, MF ;
Adkison, MD ;
Walters, CJ .
CANADIAN JOURNAL OF FISHERIES AND AQUATIC SCIENCES, 1998, 55 (11) :2503-2517