气候变化领域集成服务门户(CCPortal): Tidying up the cluttered understorey: Foraging strategy mediates bat activity responses to invasive rhododendron

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DOI	10.1016/j.foreco.2020.118392
	Tidying up the cluttered understorey: Foraging strategy mediates bat activity responses to invasive rhododendron
	Beason R.D.; Riesch R.; Koricheva J.
发表日期	2020
ISSN	0378-1127
卷号	475
英文摘要	Biological invasions pose a significant threat to biodiversity, yet the severity and direction of impacts differs between taxa. The non-native evergreen shrub Rhododendron ponticum has colonized large areas of woodland understorey in the UK and is currently undergoing widespread clearance due to its negative impacts on native flora and as a potential host reservoir for harmful pathogens. Presence of rhododendron significantly increases the amount of structural clutter in the understorey and, hence, modifies microhabitat structure, which might have an impact on bat foraging activity. Here, for the first time, we investigated the effects of rhododendron on activity of British bat species by performing autonomous acoustic surveys at twelve sites in Richmond Park, London, where rhododendron was either present, absent or recently removed. The effects of other microhabitat characteristics likely to influence bat activity (e.g. tree diversity, canopy cover, distance to water and the presence/absence of deer) were also considered. We predicted that the increased understorey clutter present in areas invaded by rhododendron would reduce the activity of larger, less agile bats Nyctalus noctula, Eptesicus serotinus and Nyctalus leisleri (NSL), whereas the activity of bat species able to forage within, or at the edges of, clutter (e.g. Myotis spp. and Pipistrellus spp.) would not be negatively affected. While our results indicated a significant reduction in the activity of larger, open space foragers (NSL) in rhododendron-invaded areas, deer presence had a stronger negative effect than woody understory density and canopy cover on these bat species. Activity of other bats recorded was not negatively impacted by the presence of rhododendron. However, sites where rhododendron had been removed demonstrated higher bat activity levels than sites where rhododendron was present and absent with the exception of Pipistrellus pygmaeus, which displayed higher activity levels in the presence of woody understorey. NSL and P. pipistrellus also demonstrated more frequent commuting/roosting activity in sites without rhododendron, although P. pygmaeus and Myotis spp. appeared to be regularly utilising at least some rhododendron sites for this purpose. To mitigate potential negative effects of rhododendron removal on some bat species, we therefore suggest restriction of deer access to sites to enable recovery of native woody understorey. © 2020 The Authors
英文关键词	Acoustic monitoring; Bats; Deer; Invasive species; Rhododendron; Temporal activity
语种	英语
scopus关键词	Biodiversity; Clutter (information theory); Ecosystems; Radar clutter; Reservoirs (water); Surveys; Acoustic survey; Activity levels; Biological invasion; Host reservoirs; Microhabitats; Potential negative effects; Presence/absence; Tree diversity; Forestry; activity pattern; bat; foraging behavior; habitat structure; invasive species; microhabitat; shrub; understory; woody plant; Bat; Biodiversity; Distance; Ecosystems; Forestry; Recovery; Sites; Surveys; England; London [England]; United Kingdom; Cervidae; Eptesicus serotinus; Myotis; Nyctalus leisleri; Nyctalus noctula; Pipistrellus; Pipistrellus pipistrellus; Pipistrellus pygmaeus; Rhododendron; Rhododendron ponticum
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/155037
作者单位	Department of Biological Sciences, Royal Holloway University of London, Egham, Surrey TW20 0EX, United Kingdom
推荐引用方式 GB/T 7714	Beason R.D.,Riesch R.,Koricheva J.. Tidying up the cluttered understorey: Foraging strategy mediates bat activity responses to invasive rhododendron[J],2020,475.
APA	Beason R.D.,Riesch R.,&Koricheva J..(2020).Tidying up the cluttered understorey: Foraging strategy mediates bat activity responses to invasive rhododendron.Forest Ecology and Management,475.
MLA	Beason R.D.,et al."Tidying up the cluttered understorey: Foraging strategy mediates bat activity responses to invasive rhododendron".Forest Ecology and Management 475(2020).