Abstract Coastal managers are increasingly challenged with implementing expensive restoration and on-going maintenance programs to reinstate the services and values of floodplains as important fish nursery areas, but access to long-term data to assist with supporting success is lacking. An environmental levy (funded by farmers, Burdekin Shire Council, a local Natural Resource Management group, and Lower Burdekin Water Board) was enacted in 2003 to fund (approximately $20,000/yr AUD) an ongoing aquatic weed removal program (consisting of an aquatic plant weed harvester that removes floating vegetation to a nearby truck for composting in conjunction with boat weed spraying) designed to maintain the delivery of irrigation water as well as promoting productive fish habitat. We repeated a fish and water quality survey first performed in 2001/2002 (September 2017, May 2018) at 10 lagoons (three clear and seven turbid) on the Burdekin floodplain (north Queensland, Australia) to examine whether these maintenance efforts continue delivering the initial values set nearly 20 years ago. A total of 2267 fish from 24 species were caught, May 2018 (post-wet season) survey yielded more fish (24 species) than the September 2017 (late dry season) survey (19 species) which is close to the results of the 2001/02 survey (post-wet season, 17 species; late dry season, 16 species). A Hydrolab (September 2017) revealed that turbid and clear water lagoons had a similar rhythmic diel temperature cycle that posed no thermal risks to fish. Dissolved oxygen had distinct diel periodicity, with clear lagoons having the widest range, reaching established critical minimum thresholds for some floodplain fish, while turbid lagoons were generally less variable (presumably due to less oxygen demand from biological activity). While as long as sugarcane production occurs, excessive nutrients will necessitate continuance of the aquatic weed program; therefore, the funding model in place must remain. This study advocates the need for long-term maintenance programs facilitated by long-term partnerships, and serves as an exemplar model for managers looking to restore coastal floodplains but are challenged with persistent aquatic weed management issues, not only in Australia but also on floodplains elsewhere.

中文翻译：

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在热带农业泛滥平原上恢复鱼类栖息地价值：从二十年的水生入侵植物维护工作中学习

摘要 沿海管理人员在实施昂贵的恢复和持续维护计划以恢复洪泛区作为重要鱼类育苗区的服务和价值方面面临越来越大的挑战，但缺乏获得长期数据以帮助支持成功的途径。2003 年颁布了一项环境税（由农民、布尔德金郡议会、当地自然资源管理组织和下布尔德金水务委员会资助），以资助（约 20,000 美元/年澳元）正在进行的水草清除计划（由水生植物组成）杂草收割机，将漂浮的植被移到附近的卡车上进行堆肥，并结合船用杂草喷洒），旨在维持灌溉水的输送以及促进多产的鱼类栖息地。我们重复了 2001/2002 年（2017 年 9 月，2018 年 5 月）在 Burdekin 洪泛区（澳大利亚昆士兰北部）的 10 个泻湖（三个清澈，七个浑浊）首次进行的鱼类和水质调查，以检查这些维护工作是否继续提供近 20 年前设定的初始值。共捕获了 24 个物种的 2267 条鱼，2018 年 5 月（雨季后）调查比 2017 年 9 月（旱季后期）调查（19 种）产量更多（24 种），接近 2001 年的结果/02 调查（雨季后，17 种；旱季晚期，16 种）。Hydrolab（2017 年 9 月）表明，浑浊和清澈的水泻湖具有类似的节律性昼夜温度循环，不会对鱼类造成热风险。溶解氧具有明显的昼夜周期，清澈的泻湖范围最广，达到某些泛滥平原鱼类的既定临界最低阈值，而浑浊的泻湖通常变化较小（可能是由于生物活动对氧气的需求较少）。而只要甘蔗生产发生，过多的养分将需要继续进行水草计划；因此，必须保留现有的供资模式。这项研究主张需要通过长期合作伙伴关系促进长期维护计划，并为希望恢复沿海洪泛平原但面临持续水草管理问题挑战的管理者提供示范模型，不仅在澳大利亚，而且在其他地方的洪泛区. 而只要甘蔗生产发生，过多的养分将需要继续进行水草计划；因此，必须保留现有的供资模式。这项研究主张需要通过长期合作伙伴关系促进长期维护计划，并为希望恢复沿海洪泛平原但面临持续水草管理问题挑战的管理者提供示范模型，不仅在澳大利亚，而且在其他地方的洪泛区. 而只要甘蔗生产发生，过多的养分将需要继续进行水草计划；因此，必须保留现有的供资模式。这项研究主张需要通过长期合作伙伴关系促进长期维护计划，并为希望恢复沿海洪泛平原但面临持续水草管理问题挑战的管理者提供示范模型，不仅在澳大利亚，而且在其他地方的洪泛区.