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dc.contributor.author
Chen, Jianguo
dc.contributor.author
Zhang, Yazhou
dc.contributor.author
Zhang, Hongrui
dc.contributor.author
Schöb, Christian
dc.contributor.author
Wang, Songwei
dc.contributor.author
Chang, Shuai
dc.contributor.author
Sun, Hang
dc.date.accessioned
2021-01-22T08:25:25Z
dc.date.available
2021-01-22T03:50:31Z
dc.date.available
2021-01-22T08:25:25Z
dc.date.issued
2021-03-25
dc.identifier.issn
0048-9697
dc.identifier.issn
1879-1026
dc.identifier.other
10.1016/j.scitotenv.2020.143091
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/464578
dc.description.abstract
Cushion plants' significant role for alpine biodiversity has been demonstrated in particular through their positive effects on plant diversity. However, their effects on higher trophic levels (e.g. insects) remain largely unclear. In this study, by field sampling in the Hengduan Mountains (HDM) in southwestern China, we evaluated the effects of an alpine gynodioecious cushion species, Arenaria polytrichoides (Carophyllaceae), on insect richness, abundance and population dynamics at two different elevations (4427 m vs. 4732 m) separately at two time periods (day vs. night) and in two growing seasons (early vs. late). The results showed that the total insect diversity decreases from low to high elevation sites. Some insect species were exclusively detected within A. polytrichoides cushions, leading to an increase in local insect richness from 7% to 35%. The positive effects of cushions on insect diversity could be attributed to unique biotic properties provided by cushions. Firstly, the effects were determined by the sexual dimorphism of the cushion with hermaphroditic cushions supporting higher insect diversity than female cushions. This could be because hermaphroditic cushions provide more resources, such as nectar and pollen grains, for insects than female cushions. Secondly, the cushions' associated beneficiary plants can also provide extra resources for attracting more insects, but this effect was mediated by the micro-environmental conditions. Finally, the magnitude of cushions' positive effects on insect dynamics were stronger under higher than under lower environmental stress. This study confirmed that facilitation by A. polytrichoides cushions in HDM plays an important role in constructing the alpine insect community and further regulating its dynamics. Moreover, the positive effects of cushions on insect dynamics increase with increasing environmental stress. Therefore, the distribution range of insects would quite possibly be expanded into higher elevation under future climate changes, which will induce new challenges for the local alpine ecosystems.
en_US
dc.language.iso
en
en_US
dc.publisher
Elsevier
en_US
dc.subject
Alpine ecosystems
en_US
dc.subject
Climate change
en_US
dc.subject
Cushion species
en_US
dc.subject
Environmental gradient
en_US
dc.subject
Insect diversity
en_US
dc.subject
Microclimatic refugia
en_US
dc.title
The positive effects of the alpine cushion plant Arenaria polytrichoides on insect dynamics are determined by both physical and biotic factors
en_US
dc.type
Journal Article
dc.date.published
2020-10-20
ethz.journal.title
The Science of The Total Environment
ethz.journal.volume
762
en_US
ethz.journal.abbreviated
Sci. Total Environ.
ethz.pages.start
143091
en_US
ethz.size
10 p.
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Amsterdam
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02703 - Institut für Agrarwissenschaften / Institute of Agricultural Sciences::09618 - Schöb, Christian / Schöb, Christian
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02350 - Dep. Umweltsystemwissenschaften / Dep. of Environmental Systems Science::02703 - Institut für Agrarwissenschaften / Institute of Agricultural Sciences::09618 - Schöb, Christian / Schöb, Christian
ethz.date.deposited
2021-01-22T03:50:45Z
ethz.source
SCOPUS
ethz.eth
yes
en_US
ethz.availability
Metadata only
en_US
ethz.rosetta.installDate
2021-01-22T08:25:39Z
ethz.rosetta.lastUpdated
2021-02-15T23:29:11Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
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