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Invasive bivalve establishment as a secondary effect of eradication-focused nuisance aquatic plant management
Lake and Reservoir Management ( IF 1.5 ) Pub Date : 2020-06-01 , DOI: 10.1080/10402381.2020.1756008
David L. Holbrook 1 , Aaron N. Schad 2 , Gary O. Dick 2 , Lynde L. Dodd 2 , James H. Kennedy 3
Affiliation  

Abstract Holbrook DL, Schad AN, Dick GO, Dodd LL, Kennedy JH. 2020. Invasive bivalve establishment as a secondary effect of eradication-focused nuisance aquatic plant management. Lake Reserv Manage. 36:423–431. We evaluated changes in aquatic vegetation cover and community structure in hydrilla (Hydrilla verticillata)-infested constructed experimental ponds after applying the management tools of triploid grass carp (Ctenopharyngodon idella) stockings, herbicide applications, and native macrophyte planting (emergent, floating-leaved, and submersed species). In ponds where aquatic vegetation was most reduced due to management (herbicide and >72 grass carp per vegetated hectare stockings), a secondary infestation of the invasive bivalve (Asian clam or Corbicula fluminea) was observed. Asian clam abundances were analyzed in relation to grass carp stocking densities (0, 40–42, 72–81, and 110–129 per vegetated hectare), depth, and changes in native and invasive vegetation community structure and cover. Data analyses showed inverse relationships of Asian clam abundances to vegetation cover and to depth, as well as a synergetic relationship with grass carp stocking density. Implications of this research indicate that when a nuisance aquatic plant management strategy is focused on full or near eradication of a target species, inevitable damage to native species that might otherwise preserve beneficial ecological components may result in secondary issues, such as the expansion of additional invasive species due to opening of habitats. Excessive control efforts of a targeted nuisance plant species, and the results here highlight potential unintended consequences of over management of natural resources.

中文翻译:

作为以根除为重点的滋扰水生植物管理的次要效应,入侵双壳类动物的建立

摘要 Holbrook DL、Schad AN、Dick GO、Dodd LL、Kennedy JH。2020. 作为以根除为重点的滋扰水生植物管理的次要效应,入侵双壳贝类的建立。湖泊保护区管理。36:423–431。我们评估了在应用三倍体草鱼 (Ctenopharyngodon idella) 放养管理工具、施用除草剂和本地大型植物种植(芽生、浮叶、和水下物种)。在水生植被因管理(除草剂和每公顷长袜超过 72 条草鱼)而减少最多的池塘中,观察到入侵双壳类动物(亚洲蛤或 Corbicula fluminea)的二次侵染。分析了与草鱼放养密度(每植被公顷 0、40-42、72-81 和 110-129 个)、深度以及本地和入侵植被群落结构和覆盖的变化相关的亚洲蛤丰度。数据分析表明,亚洲蛤的丰度与植被覆盖和深度呈负相关,并与草鱼放养密度呈协同关系。这项研究的意义表明,当滋扰水生植物管理策略的重点是完全或接近根除目标物种时,对本来可以保留有益生态成分的本地物种不可避免的损害可能会导致次要问题,例如额外入侵物种的扩大。由于栖息地开放而产生的物种。过度控制目标滋扰植物物种,
更新日期:2020-06-01
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