Persistent invasion by non-native species and transition to an upland community after removal of invasive Tamarix in a Californian cienega

IF 2.6 3区 环境科学与生态学 Q2 ECOLOGY Journal of Arid Environments Pub Date : 2024-06-23 DOI:10.1016/j.jaridenv.2024.105212
Laurel M. Brigham , Julie Coffey , Megan E. Lulow , Priscilla Ta , Sarah Kimball
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Abstract

The targeted removal of a non-native species can result in secondary invasions and other unexpected shifts in plant community composition, but the persistence of these effects is less well known. We investigated how the plant community changed at three time points including before removal (pre-removal), in the years directly following removal (post-removal), and 16 years following Tamarix removal (recent) in an arid depressional wetland. Non-native species cover increased and several non-native species invaded the study area in the years between post-removal surveys and the recent time period, suggesting Tamarix removal may have been a catalyst for increases in non-native species abundance. We also found an increase in the cover of species tolerating upland conditions, and these species were largely non-native. Overall, interactions between targeted removal and shifts in the abiotic environment due to climate change are important drivers of persistent shifts in the plant community. Hydrogeomorphic restoration is likely needed in tandem with invasive removal to see improvements in riparian health, particularly when the invasive species to be removed is a passenger in addition to being a driver of change.

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非本地物种的持续入侵以及移除入侵柽柳后向高地群落的过渡
有针对性地移除非本地物种可能会导致植物群落组成的二次入侵和其他意想不到的变化,但这些影响的持续性却鲜为人知。我们研究了干旱洼地湿地植物群落在三个时间点的变化情况,包括移除前(移除前)、移除后数年(移除后)以及移除柽柳后 16 年(近期)。在移除后调查与近期调查之间的几年里,非本地物种的覆盖率增加了,一些非本地物种入侵了研究区域,这表明柽柳的移除可能是非本地物种丰度增加的催化剂。我们还发现,耐受高地条件的物种覆盖率有所增加,而这些物种大多是非本地物种。总之,目标清除与气候变化导致的非生物环境变化之间的相互作用是植物群落持续变化的重要驱动力。要想改善河岸健康状况,水文地貌恢复很可能需要与入侵物种清除同时进行,尤其是当要清除的入侵物种除了是变化的驱动因素外,还是客体时。
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来源期刊
Journal of Arid Environments
Journal of Arid Environments 环境科学-环境科学
CiteScore
5.70
自引率
3.70%
发文量
144
审稿时长
55 days
期刊介绍: The Journal of Arid Environments is an international journal publishing original scientific and technical research articles on physical, biological and cultural aspects of arid, semi-arid, and desert environments. As a forum of multi-disciplinary and interdisciplinary dialogue it addresses research on all aspects of arid environments and their past, present and future use.
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