Lizotte Richard E, Moore Matthew T
USDA-ARS National Sedimentation Laboratory, Oxford, MS, USA.
Bull Environ Contam Toxicol. 2017 Jan;98(1):58-64. doi: 10.1007/s00128-016-1978-1. Epub 2016 Nov 22.
Hydraulically connected wetland microcosms vegetated with either Typha latifolia or Myriophyllum aquaticum were amended with an NHNO and permethrin mixture to assess the effectiveness of both plant species in mitigating effects of the pollutant mixture on phytoplankton (as chlorophyll a) and Hyalella azteca. Phytoplankton grew in response to increased NHNO in the presence of all plant species, but was unaffected by exposure to permethrin. H. azteca responses occurred rapidly (0.17 days), was mitigated within 1-2 days, and aqueous toxicity was unaffected by plant species type. A toxic unit model approach ascertained primary toxicity was permethrin with minimal additional toxicity from NHNO. Varying aquatic plant species had only modest influences on phytoplankton responses and no observable influence on animal responses during nitrogen-permethrin mixture exposures. As a result, both T. latifolia and M. aquaticum can be used as part of an effective agricultural best-management practice system for mitigating pollutant impacts of agricultural run-off.
对种植有宽叶香蒲或水生狐尾藻的水力连接湿地微宇宙施加硝酸铵和氯菊酯混合物，以评估这两种植物在减轻污染物混合物对浮游植物（以叶绿素a计）和阿氏摇蚊影响方面的有效性。在所有植物物种存在的情况下，浮游植物会随着硝酸铵含量的增加而生长，但不受氯菊酯暴露的影响。阿氏摇蚊的反应迅速（0.17天），在1 - 2天内得到缓解，且水体毒性不受植物物种类型的影响。一种毒性单位模型方法确定主要毒性来自氯菊酯，硝酸铵的额外毒性最小。在氮 - 氯菊酯混合物暴露期间，不同的水生植物物种对浮游植物反应的影响较小，对动物反应没有明显影响。因此，宽叶香蒲和水生狐尾藻都可作为有效的农业最佳管理实践系统的一部分，用于减轻农业径流的污染物影响。
