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Heated rivalries: Phenological variation modifies competition for pollinators among arctic plants

Tiusanen, Mikko and Kankaanpaa, Tuomas and Schmidt, Niels M. and Roslin, Tomas (2020). Heated rivalries: Phenological variation modifies competition for pollinators among arctic plants. Global Change Biology. 26 , 6313-6325
[Journal article]

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Abstract

When plant species compete for pollinators, climate warming may cause directional change in flowering overlap, thereby shifting the strength of pollinator-mediated plant-plant interactions. Such shifts are likely accentuated in the rapidly warming Arctic. Targeting a plant community in Northeast Greenland, we asked (a) whether the relative phenology of plants is shifting with spatial variation in temperature, (b) whether local plants compete for pollination, and (c) whether shifts in climatic conditions are likely to affect this competition. We first searched for climatic imprints on relative species phenology along an elevational gradient. We then tested for signs of competition with increasing flower densities: reduced pollinator visits, reduced representation of plant species in pollen loads, and reduced seed production. Finally, we evaluated how climate change may affect this competition. Compared to a dominant species,Dryas integrifolia x octopetala, the relative timing of other species shifted along the environmental gradient, withSilene acaulisandPapaver radicatumflowering earlier toward higher elevation. This shift resulted in larger niche overlap, allowing for an increased potential for competition for pollination. Meanwhile,Dryasemerged as a superior competitor by attracting 97.2% of flower visits. HigherDryasdensity resulted in reduced insect visits and less pollen ofS. acaulisbeing carried by pollinators, causing reduced seed set byS. acaulis. Our results show that current variation in climate shifts the timing and flowering overlap between dominant and less-competitive plant species. With climate warming, such shifts in phenology within trophic levels may ultimately affect interactions between them, changing the strength of competition among plants.

Authors/Creators:Tiusanen, Mikko and Kankaanpaa, Tuomas and Schmidt, Niels M. and Roslin, Tomas
Title:Heated rivalries: Phenological variation modifies competition for pollinators among arctic plants
Series Name/Journal:Global Change Biology
Year of publishing :2020
Volume:26
Page range:6313-6325
Number of Pages:13
Publisher:WILEY
ISSN:1354-1013
Language:English
Publication Type:Journal article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
Keywords:arctic ecology, climate change effects, competition for pollination, flowering phenology, indirect competition, phenology shift, pollination
URN:NBN:urn:nbn:se:slu:epsilon-p-108095
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-108095
Additional ID:
Type of IDID
DOI10.1111/gcb.15303
Web of Science (WoS)000568853400001
ID Code:18738
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Ecology
(S) > Dept. of Ecology
Deposited By: SLUpub Connector
Deposited On:25 Nov 2020 10:23
Metadata Last Modified:15 Jan 2021 19:46

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