Rotenone for exotic trout eradication: nontarget impacts on aquatic communities in a mountain lake
Rotenone for exotic trout eradication: nontarget impacts on aquatic communities in a mountain lake
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DOI：
10.1080/10402381.2021.1912864
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发表时间：
2021-05-22
影响因子：
1.5
通讯作者：
Derry, A. M.
中科院分区：
文献类型：
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作者：
Beaulieu, J.;Trepanier-Leroux, D.;Derry, A. M.
Beaulieu J，Trepanier-Leroux D，Fischer JM，Olson MH，Thibodeau S，Humphries S，Fraser DJ，德里AM. 2021.鱼藤酮对外来鳟鱼的根除：对山湖水生群落的非目标影响。湖泊保护区管理。XX：XXX-XXX。鱼藤酮被广泛用于湖泊和水库管理，以消灭外来鱼类。然而，鱼藤酮对淡水生物，如浮游动物和大型无脊椎动物的非目标影响是令人关注的，因为这些生物在水生食物网中作为鱼类资源基础的生态重要性，特别是当鱼藤酮被应用到湖泊本地鱼类重新引入之前。我们的研究的目的是确定鱼藤酮对非目标浮游动物和大型无脊椎动物物种组合的影响，在源头山湖，鱼藤酮被施加到去除外来溪鳟（Salvelinus fontinalis;班夫，AB加拿大）。我们发现强烈的负面鱼藤酮的影响，甲壳类浮游动物的群落结构和密度，并在较小程度上对大型无脊椎动物，持续至少1年后的鱼藤酮治疗。我们的研究提供了2个独特的见解，区别于其他湖泊的鱼藤酮研究：（1）在鱼藤酮处理后的11个月，浮游甲壳动物在随后的夏天持续几乎完全消失，（2）大型无脊椎动物群落组成发生了相当大的变化，这可能是由于非靶鱼藤酮对分类群密度的影响和与根除小溪相关的营养相互作用的综合作用造成的湖上的鳟鱼我们主张，在水生食物网的恢复辅助tenonization可以发挥重要作用，促进非目标水生生物群落恢复后，湖鱼藤酮处理。
Beaulieu J, Trepanier-Leroux D, Fischer JM, Olson MH, Thibodeau S, Humphries S, Fraser DJ, Derry AM. 2021. Rotenone for exotic trout eradication: nontarget impacts on aquatic communities in a mountain lake. Lake Reserv Manage. XX:XXX-XXX. Rotenone is widely used in lake and reservoir management for the eradication of exotic fish. However, nontarget effects of rotenone on freshwater organisms such as zooplankton and macroinvertebrates are of concern because of the ecological importance of these organisms in aquatic food webs as a resource base for fish, especially when rotenone is applied to lakes prior to native fish reintroduction. The objective of our study was to determine the effects of rotenone on nontarget zooplankton and macroinvertebrate species assemblages in a headwater mountain lake where rotenone was applied to remove exotic brook trout (Salvelinus fontinalis; Banff, AB Canada). We found strong negative rotenone impacts on the community structure and density of crustacean zooplankton, and to a lesser extent on macroinvertebrates, lasting for at least 1 yr after the rotenone treatment. Our study offers 2 unique insights that differentiate from rotenone studies on other lakes: (1) the persistent and almost complete eradication of crustacean zooplankton in the following summers, 11 months after rotenone treatment, and (2) a considerable shift in the macroinvertebrate community composition, likely resulting from combined effects of both nontarget rotenone effects on taxon density and trophic interactions associated with the eradication of brook trout from the lake. We advocate that assisted recolonization in the restoration of aquatic food webs could play an important role in facilitating nontarget aquatic community recovery following lake rotenone treatment.