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首页> 外文期刊>ICES Journal of Marine Science >Examining the ecological role of jellyfish in the Eastern Bering Sea
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Examining the ecological role of jellyfish in the Eastern Bering Sea

机译：考察白令海东部海el的生态作用

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Within the Eastern Bering Sea, the jellyfish Chrysaora melanaster has fluctuated widely over recent decades. We examined the role of C. melanaster as an ecosystem-structuring agent via application of ecosystem models representing inner-, mid-, and outer-shelf regions of comparable areal coverage. Chrysaora melanaster utilize 1% of total mid-shelf consumer production, or 1/4th the energy required by forage fish (capelin Mallotus villosus, Pacific herring Clupea pallasii, age-0 Pacific cod Gad us macrocephalus, age-0 walleye pollock Gad us chalcogrammus). Model simulations show the impacts of C. melanaster are broadly distributed across consumer groups with increasingly negative impacts with higher jellyfish biomass. Age-0 pollock represent the greater part of the forage fish biomass, and observed pollock biomass during low jellyfish years (2004-2007) was significantly greater than during high jellyfish years (2009-2014). However, sensitivity among consumer groups to observed jellyfish variability is small, within 5% of baseline (2004-2015) conditions. Estimates using similar models for the Coastal Gulf of Alaska (CGoA) and Northern California Current (NCC) suggest large differences in the role of scyphozoans among northern Pacific shelf ecosystems. Only 0.1% of total summer consumer production is required to support CGoA Chrysaora, while the coastal NCC population uses 19%.
机译：在白令海东部，近几十年来海the Chrysaora melanaster的波动很大。我们通过应用生态系统模型（代表可比面积覆盖的内部，中部和外部架子区域）研究了C. melanaster作为生态系统构建剂的作用。 Chrysaora melanaster利用了货架中消费者总产量的1％，或饲用鱼（毛鳞鱼Mallotus villosus，太平洋鲱Clupea pallasii，年龄0的太平洋鳕鱼Gad us macrocephalus，年龄0的角膜孔雀Gad us chalcogrammus）所需能量的1/4。 ）。模型仿真表明，黑腹果蝇的影响广泛分布于各个消费群体，而随着海el生物量的增加，其负面影响越来越大。零龄鳕鱼占饲料鱼生物量的大部分，在低水母年（2004-2007年）观察到的鳕鱼生物量显着大于高水母年（2009-2014年）。但是，消费者群体对观察到的海ly变异性的敏感性很小，在基线（2004-2015年）状况的5％之内。使用类似模型对阿拉斯加海岸湾（CGoA）和北加利福尼亚洋流（NCC）进行的估算表明，北太平洋陆架生态系统中，鞘氨醇的作用存在很大差异。支持CGoA Chrysaora仅需要夏季消费者总产量的0.1％，而沿海NCC人口使用19％。

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