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Surviving Invasion: Regaining Native Fish Resilience Following Fish Invasions in a Modified Floodplain Landscape
Water Resources Research ( IF 5.4 ) Pub Date : 2021-08-06 , DOI: 10.1029/2020wr029513
M.A. Pingram 1 , K.J. Collier 2 , A.K. Williams 1 , B.O. David 1 , J. Garrett‐Walker 3 , K. Górski 4, 5 , D. Özkundakci 1, 2 , E.F. Ryan 1
Affiliation  

Floodplain ecosystems are focal points for human settlement, and consequently are often subjected to extensive modification and infrastructure development. Establishment of non-native species in floodscapes presents a range of challenges when they become problematic and drive changes in native aquatic communities and ecosystems. These non-native species are often tolerant of reduced water and habitat quality, conferring a competitive advantage over native species. The coupled effects of invasive alien species, landscape modification and floodscape hydrological control collectively reduce ecological resilience, creating feedback loops that reinforce negative effects on native fish. The regulated lower Waikato River floodplain is a New Zealand hotspot for fish introductions, with their proliferation exacerbating the effects of agricultural development, urban expansion, and flood control infrastructure. We argue that the resilience of native fish assemblages to these pressures can be improved through utilizing a series of complementary measures, including enhanced catchment management, strategic alterations to the location, design, and operation of floodplain infrastructure (e.g., gates, pumpstations, and stopbanks), habitat restoration for native fish, and targeted management of invasive species. These measures will need to consider the likely persistence of invasive alien fish, however, to limit their expansion in the face of a changing climate. Although knowledge and implementation gaps exist, tying these strands together presents an opportunity to enhance the resilience of native fisheries into the future. Key to success will be re-thinking floodplain management to include ecosystem services, and this will require ongoing commitment and cooperation amongst all stakeholders to address knowledge gaps and enable effective implementation.

中文翻译:

在入侵中幸存下来:在修改后的洪泛区景观中鱼类入侵后恢复本地鱼类的复原力

洪泛区生态系统是人类住区的焦点,因此经常受到广泛改造和基础设施发展的影响。当非本地物种出现问题并推动本地水生群落和生态系统发生变化时,在洪水景观中建立非本地物种会带来一系列挑战。这些非本地物种通常能够容忍减少的水和栖息地质量,从而比本地物种具有竞争优势。外来入侵物种、景观改造和洪水景观水文控制的耦合效应共同降低了生态恢复力,形成了反馈循环,加剧了对本地鱼类的负面影响。受管制的怀卡托河下游泛滥平原是新西兰鱼类引进的热点,它们的扩散加剧了农业发展、城市扩张和防洪基础设施的影响。我们认为,通过利用一系列补充措施,包括加强集水区管理、对洪泛区基础设施(例如,闸门、泵站和拦河坝)的位置、设计和运营进行战略性改变,可以提高本地鱼类种群对这些压力的适应能力。 )、本地鱼类栖息地恢复以及入侵物种的针对性管理。然而,这些措施需要考虑外来入侵鱼类的可能持续存在,以限制它们在气候变化时的扩张。尽管存在知识和实施差距,但将这些联系在一起提供了一个机会,可以增强本地渔业对未来的适应能力。
更新日期:2021-09-10
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