A study designed to examine the effe

A study designed to examine the effect of intermittent diffuse nutrient inputs on diatom assemblages in a small upland stream in northern England was confounded by other changes that occurred in the stream just before fertilisation started. A flora dominated by attached diatoms changed, over a period of about 3 weeks to one dominated by motile Nitzschia spp. In the absence of any likely human causes, the most likely reason for this change was undercutting of a meander upstream, releasing fine silts which favoured motile diatoms. Changes due to fertilisation by phosphorus were also recorded, with an increase in the proportion of Epithemia in samples, possibly favoured by the lower N:P ratio caused by the increased P concentration. The implication of these changes for monitoring eutrophication and ecological status in upland streams is discussed.
# 2003 Elsevier Science Ltd. All rights reserved.

結果 (中文) 1:

一项研究，旨在探讨间歇性 diffuse 养分投入对硅藻在英格兰北部的一个小旱流的 effect 受精开始之前，只是发生在流中的其他变化搞得狼狈不堪。由附加硅藻改变，为期约 3 个星期到一个以能动菱形藻菌为主的菌群在没有任何可能人为原因的情况下，最可能的原因，这种变化被削弱的曲流逆流而上，释放赞成能动硅藻的细粉。受精的磷变化也录得，与 Epithemia 在样品中，可能受低叶片氮、 磷浓度增加所引起的比例增加。讨论了这些监测水体富营养化和上游溪流生态状况的变化及意义。# 2003年爱思唯尔科学有限公司保留所有权利。

結果 (中文) 3:

一项研究旨在探讨间歇性地ffEff等利用养分的投入，在英格兰北部的一个小高地流硅藻组合是混淆了其他的变化，发生在流在受精开始。通过改变附着硅藻为主的菌群，在一段约3周的一个能动的菱形藻属为主在任何可能的人为原因的情况下，这种变化的最可能的原因是上游河曲根切，释放细粉有利于能动硅藻。磷由于受精的改变也被记录，在窗纹藻科中的比例增加，可能是受低氮磷比的磷浓度的增加引起的。讨论了这些变化对陆地河流富营养化监测和生态地位的含义。
#2003 Elsevier科学有限公司保留所有权利。