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首页> 外文期刊>Canadian Journal of Fisheries and Aquatic Sciences >Phytoplankton productivity across prairie saline lakes of the Great Plains (USA): a step toward deciphering patterns through lake classification models
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Phytoplankton productivity across prairie saline lakes of the Great Plains (USA): a step toward deciphering patterns through lake classification models

机译：大平原（美国）大草原盐湖的浮游植物生产力：迈向通过湖泊分类模型破译模式的一步

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We investigated patterns of primary production across prairie saline lakes in the central and northern Great Plains of the United States. Based on comparative lake sampling in 2004, seasonal predictors of algal primary productivity were identified within subsets of similar lakes using a combination of Akaike's information criterion (AIC) and classification and regression trees (CART). These models indicated complex patterns of nutrient limitation by nitrogen (N), phosphorus (P), and iron (Fe) within different lake groups. Nutrient enrichment assays (control, + Fe, + N, + P, + N + P) were performed in spring and summer of 2006 to determine if phytoplankton in selected lakes followed predicted patterns of nutrient limitation. Both the comparative lake sampling and experimental results indicated that N limitation was widespread in these prairie lakes, with evidence for secondary P limitation in certain lakes. In the experiments, iron did not stimulate primary production. Our results suggest that given the diverse geochemical nature of these lakes, classification models that separate saline lakes into subsets may be an effective method for improving predictions of algal production.
机译：我们调查了美国大平原中部和北部大草原盐湖的初级生产方式。基于2004年的比较湖泊采样，结合Akaike信息标准（AIC）和分类回归树（CART），在相似湖泊的子集中确定了藻类主要生产力的季节性预测因子。这些模型表明了不同湖泊群中氮（N），磷（P）和铁（Fe）限制营养的复杂模式。在2006年春季和夏季进行了营养富集试验（对照，+ Fe，+ N，+ P，+ N + P），以确定所选湖泊中的浮游植物是否遵循了预期的养分限制模式。对比湖泊采样和实验结果均表明，这些草原湖泊普遍存在N限制，某些湖泊中存在次生P限制的证据。在实验中，铁没有刺激初级生产。我们的结果表明，鉴于这些湖泊具有多种多样的地球化学性质，将盐湖分为不同子集的分类模型可能是改善藻类产量预测的有效方法。

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