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首页> 美国卫生研究院文献>The Scientific World Journal >Effects of Temperature, Salinity, pH, and Light on Filtering and Grazing Rates of a Calanoid Copepod (Schmackeria dubia)
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Effects of Temperature, Salinity, pH, and Light on Filtering and Grazing Rates of a Calanoid Copepod (Schmackeria dubia)

机译：温度，盐度，pH和光对Calanoid pe足类（Schmackeria dubia）的过滤和放牧速率的影响

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摘要

Calanoid copepods are key components of the marine food web and the food sources of many larval fishes and planktivores, and grazers of phytoplankton. Understanding the ranges of major environmental variables suitable for their growth is essential to maintain the balance between trophic links and resources protection. In this study, the effects of temperature, salinity, pH, and light intensity on the filtering and grazing rates of a herbivorous copepod (Schmackeria dubia) were conducted in several control experiments. Our results indicated that experimental animals grazed normally at water temperatures between 15 and 35°C. The filtering and grazing rates increased by onefold at water temperatures from 15 to 25°C, with a peak at around 30°C. S. dubia fed normally at salinity ranging from 20 to 30 ppt, with significantly low filtering and grazing rates at salinity below 15 ppt and above 35 ppt. The filtering and grazing rates increased as pH increased, peaked at approximately 8.5, and then decreased substantially. Light intensity also displayed an important impact on the filtering and grazing rates. Filtering and grazing rates were high when light intensity was greater than 20 and less than 200 µmol m s. S. dubia nearly stopped feeding at low light intensity (less than 20 µmol m s).
机译：Calanoid co足类是海洋食物网的重要组成部分，也是许多幼体鱼类和浮游动物以及浮游植物放牧者的食物来源。了解适合其生长的主要环境变量的范围对于维持营养联系与资源保护之间的平衡至关重要。在这项研究中，温度，盐度，pH和光强度对草食co足类动物（Schmackeria dubia）的过滤和放牧率的影响是在几个对照实验中进行的。我们的结果表明实验动物在15至35°C的水温下正常放牧。在水温从15到25°C时，过滤率和放牧率增加了两倍，在30°C时达到峰值。正常链球菌的盐度为20至30 ppt，在盐度低于15 ppt和高于35 ppt时，过滤和放牧率明显较低。过滤和放牧速率随pH的增加而增加，在约8.5达到峰值，然后大幅下降。光照强度也对过滤和放牧率显示出重要影响。当光强度大于20和小于200 µmol m s时，过滤和放牧率很高。在低光强度（小于20 µmol m s）下，S。dubia几乎停止进食。

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