Nutrient – sestonic chlorophyll relationships in northern Ozark streams
Nutrient – sestonic chlorophyll relationships in northern Ozark streams
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DOI：
10.1139/f98-160
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发表时间：
1999
影响因子：
2.4
通讯作者：
K. Lohman;John R. Jones
中科院分区：
文献类型：
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作者：
K. Lohman;John R. Jones
我们调查了密苏里州奥扎克13条溪流的23个地点的叶绿素（Chl）、总磷（TP）和总氮（TN）之间的关系。有一个很强的曲线关系，平均sestonic叶绿素和平均TP（R2 = 0.78）和平均TN（R2 = 0.70）。当集水面积与TP（R2 = 0.90）或TN（R2 = 0.84）结合时，两个模型都得到了改善。仅限于17个站点没有点源养分添加，悬浮叶绿素和TP和TN的关系是线性的。包括集水区加强线性模型与TP（R2 = 0.94）或TN（R2 = 0.84）。土地利用（百分比行作物或百分比森林），连同集水面积，也是一个很好的预测sestonic叶绿素在Ozark流没有点源。当集水面积和TP或TN被用来预测特定日期后，灾难性洪水的sestonic叶绿素，模型的准确性低于那些基于长期平均值，但仍然解释了55-74%的方差sestonic叶绿素。
We investigated relationships between sestonic chlorophyll (Chl), total phosphorus (TP), and total nitrogen (TN) at 23 sites on 13 streams in the Missouri Ozarks. There was a strong curvilinear relationship between mean sestonic Chl and both mean TP (R2 = 0.78) and mean TN (R2 = 0.70). Both models were improved when catchment area was included with either TP (R2 = 0.90) or TN (R2 = 0.84). Limited to 17 sites without point source nutrient additions, the relationship between sestonic Chl and both TP and TN was linear. Including catchment area strengthened linear models with either TP (R2 = 0.94) or TN (R2 = 0.84). Land use (percent row crop or percent forest), together with catchment size, was also a good predictor of sestonic Chl in Ozark streams without point sources. When catchment area and TP or TN were used to predict sestonic Chl on specific dates following catastrophic flooding, models were less accurate than those based on long-term averages, but still explained 55-74% of the variance in sestonic Ch...