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首页> 外文期刊>Journal of great lakes research >Using Abiotic and Biotic Factors to Predict the Range Expansion of White Perch in Lake Champlain
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Using Abiotic and Biotic Factors to Predict the Range Expansion of White Perch in Lake Champlain

机译：利用非生物和生物因素预测尚普兰湖白色鲈鱼的范围扩展

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White perch (Morone americana) invaded Lake Champlain, New York-Vermont, in the mid-1980s, yet abundance of white perch and those factors controlling their abundance are unknown. To predict the expansion of white perch, we differentiated between the most likely factors affecting white perch abundance; habitat characteristics or an invasion gradient (i.e., abundance is greater near the point of entry). Therefore, we addressed three questions: 1) where are white perch currently established; 2) what is the relation of white perch abundance to environmental variables and to an invasion gradient; and 3) based on the most likely factors affecting abundance, where will white perch become abundant in Lake Champlain? Fish communities were sampled and ten environmental variables were measured at sites along the eastern shore of Lake Champlain. Among sites and across seasons, two abiotic factors (turbidity and conductivity) had the greatest effect on white perch abundance. Biotic factors, yellow perch (Perca flavescens) abundance and chlorophyll a, however had lesser effects. We predict white perch will not become abundant in habitats with low water conductivity, turbidity and chlorophyll a, and a high abundance of potential competitors. Our predictions are consistent with data from other systems, which indicate environmental characteristics are likely more important than an invasion gradient in contributing to white perch colonization.
机译：白色鲈鱼（Morone americana）在1980年代中期入侵了纽约佛蒙特州的尚普兰湖，但是尚不知道白色鲈鱼的丰度和控制其丰度的那些因素。为了预测白鲈的扩展，我们对影响白鲈丰度的最可能因素进行了区分。生境特征或入侵梯度（即进入点附近的丰度更大）。因此，我们解决了三个问题：1）白鲈目前在哪里建立； 2）白鲈丰度与环境变量和入侵梯度之间的关系是什么？ （3）根据最可能影响丰度的因素，尚普兰湖的白鲈在哪里富集？在尚普兰湖东岸的一些地方对鱼类群落进行了采样并测量了十个环境变量。在站点之间和跨季节，两个非生物因素（浊度和电导率）对白鲈的丰度影响最大。生物因子，黄鲈（Perca flavescens）丰度和叶绿素a的影响较小。我们预测，在水传导率低，浊度和叶绿素a含量低且潜在竞争者含量高的栖息地中，白鲈不会变得丰富。我们的预测与其他系统的数据一致，这些数据表明环境特征可能比入侵梯度对白鲈的定殖更为重要。

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