Evaluation of extinction risk for stream fishes within an urban riverscape using population viability analysis

IF 2.5 3区 环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES Aquatic Conservation-Marine and Freshwater Ecosystems Pub Date : 2024-06-19 DOI:10.1002/aqc.4164
Brock M. Huntsman, Kai Palenscar, Kerwin Russell, Brett Mills, Chris Jones, William Ota, Kurt E. Anderson, Heather Dyer, Fitsum Abadi, Marissa Wulff
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Abstract

1. The Santa Ana River in the Los Angeles region of California demonstrates common habitat degradation symptoms that are characteristic of the urban stream syndrome. These impacts have altered the Santa Ana River community structure, with few species as impacted as the native Santa Ana sucker (sucker; Pantosteus santaanae). 2. Consequently, a recovery plan developed for sucker identified the need for a population viability analysis (PVA) to assess sucker extirpation risk. However, PVAs can be data-intensive and are subject to several sources of bias when standardized protocols are absent. 3. More than 20 years of sucker and arroyo chub (chub; Gila orcuttii) surveys using different methods were compiled to build an integrated hierarchical multi-population PVA to estimate trends in abundance and extirpation probability of these native fishes from the Santa Ana River. 4. PVA modelling indicated similar patterns in sucker and chub abundance along the Santa Ana River, with the highest abundance of both species in the upper regions of the river during the early 2000s and downstream in recent years (2018–2022). Extirpation risk was estimated to be greatest near wastewater treatment facilities, where native fish abundance estimates have been zero since 2018. Extirpation risk was lower downstream of the wastewater treatment facilities for both species, although extinction risk was higher for sucker than chub throughout the river. 5. As the model evolves and more data are collected, the PVA could be used to assess the effects of various management actions, such as non-native predator removals and native fish re-introductions, on sucker and chub persistence.

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利用种群生存能力分析评估城市河流景观中溪流鱼类的灭绝风险
1.加利福尼亚州洛杉矶地区的圣安娜河(Santa Ana River)表现出城市溪流综合症所特有的常见生境退化症状。这些影响改变了圣安娜河的群落结构,很少有物种像本地的圣安娜吸盘鱼(吸盘鱼;Pantosteus santaanae)一样受到影响。2.因此,为吸盘鱼制定的恢复计划确定需要进行种群生存能力分析(PVA),以评估吸盘鱼灭绝的风险。然而,种群存活率分析需要大量数据,而且在缺乏标准化协议的情况下,可能会出现一些偏差。3.3. 使用不同的方法对吸盘鱼和箭鱼(chub; Gila orcuttii)进行了 20 多年的调查,以建立一个综合的分层多种群 PVA,从而估计这些本地鱼类在圣安娜河的丰度趋势和灭绝概率。4.PVA 模型表明,圣安娜河沿岸的吮吸鱼和鲢鱼丰度具有相似的模式,在 2000 年代早期,这两种鱼类在河流上游地区的丰度最高,而在最近几年(2018-2022 年),这两种鱼类在下游地区的丰度最高。据估计,污水处理设施附近的灭绝风险最大,自 2018 年以来,该处的本地鱼类丰度估计值为零。在废水处理设施下游,两种鱼类的灭绝风险都较低,但在整条河流中,吮吸鱼的灭绝风险高于鲢鱼。5.随着模型的发展和更多数据的收集,PVA 可用于评估各种管理措施(如清除非本地捕食者和重新引入本地鱼类)对吮吸鱼和鲢鱼持久性的影响。
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来源期刊
Aquatic Conservation-Marine and Freshwater Ecosystems
Aquatic Conservation-Marine and Freshwater Ecosystems 环境科学-海洋与淡水生物学
CiteScore
5.50
自引率
4.20%
发文量
143
审稿时长
18-36 weeks
期刊介绍: Aquatic Conservation: Marine and Freshwater Ecosystems is an international journal dedicated to publishing original papers that relate specifically to freshwater, brackish or marine habitats and encouraging work that spans these ecosystems. This journal provides a forum in which all aspects of the conservation of aquatic biological resources can be presented and discussed, enabling greater cooperation and efficiency in solving problems in aquatic resource conservation.
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