Inorganic forms of nitrogen and phosphorus, oxygen levels, suspended solids, and planktonic primary productivity were monitored in Guadalupe River, a major waterway in southeast Texas. Our measurements have shown elevated levels of inorganic nutrients, with soluble reactive phosphorus reaching into 30 μg/L. Curiously, those elevated levels of nutrients combined with unexpectedly high nitrogen to phosphorus (N:P) ratio and low planktonic primary productivity. We attribute those phenomena to suspended solids acting as a selective sink for phosphorus while preventing effective photosynthesis in planktonic algae. At the same time, the potential for nitrogen removal is limited by abundant oxygen present in the water. This combination of low light, selective phosphorus removal, and high oxygen levels suggest that the Guadalupe River is likely to effectively export nitrogen, but not phosphorus into the estuary.

中文翻译：

---

得克萨斯州沿海河流中氮磷比高：养分污染源和出口的起源及其影响

在得克萨斯州东南部的主要水道瓜达卢佩河中监测了无机形式的氮和磷，氧水平，悬浮固体和浮游初生生产力。我们的测量结果表明，无机养分水平升高，可溶性反应性磷达到30μg/ L。奇怪的是，那些营养水平的升高与出乎意料的高氮磷比率（N：P）和低浮游初级生产力相结合。我们将这些现象归因于悬浮固体充当了磷的选择性吸收剂，同时阻止了浮游藻类的有效光合作用。同时，水中的大量氧气限制了脱氮的潜力。低光，选择性除磷的结合，