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首页> 外文期刊>Estuarine Coastal and Shelf Science >Estuarine calanoid copepod abundance in relation to season, salinity, and land-derived nitrogen loading, Waquoit Bay, MA
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Estuarine calanoid copepod abundance in relation to season, salinity, and land-derived nitrogen loading, Waquoit Bay, MA

机译：与季节，盐度和土地来源的氮负荷相关的河口pe足类足足的丰度，马萨诸塞州沃奎特湾

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摘要

Calanoid copepod abundance and distribution were measured by monthly plankton tows from May through November in 1998 and March through August in 1999 in three subestuaries of the Waquoit Bay estuarine system. There was a dramatic seasonal change in the composition of calanoids in Waquoit Bay with a spring community consisting of Acartia hudsonica, Centropages hamatus, and Eurytemora affinis, replaced by Acartia tonsa in the summer. The abundance of A. hudsonica, A. tonsa. and C. hamatus was higher in the saltier reaches of the subestuaries, but the abundance of E. affinis and copepod nauplii was not affected by salinity. Even though different land-derived nitrogen loads created different concentrations of chlorophyll in the water of Waquoit Bay subestuaries, there was no apparent response in the abundance of most calanoid copepods to differences in nitrogen load to the subestuaries. The uncoupling of phytoplankton food from mesozooplankton consumers suggests that other factors such as water residence time, phytoplankton quality and composition, or variations in microzooplankton food play a role in the abundance dynamics of Waquoit Bay calanoid populations.
机译：1998年5月至11月和1999年3月至1999年8月，在Waquoit湾河口系统的三个子河口中，按月浮游生物丝束测量了alan足足足类的丰度和分布。在Waquoit湾，类胡萝卜素的组成发生了戏剧性的季节性变化，春季群落包括A螨、,肉和Eurytemora affinis，在夏季被tons螨取代。丰富的A. hudsonica，A.tonsa。沙门氏菌在河口较咸的河段较高，但盐度对链球菌和co足无节幼体的丰度没有影响。即使不同的土地氮负荷在沃奎特湾河口河水中产生了不同浓度的叶绿素，但大多数cal足类足足对河口氮负荷的差异并没有明显的响应。浮游植物的食物与中浮游动物的消费者解耦表明，其他因素，例如水的停留时间，浮游植物的质量和组成，或微浮游动物的食物变化，在Waquoit湾an龙类种群的数量动态中起作用。

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