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Impact of ambient temperature, precipitation and seven years of experimental warming and nutrient addition on fruit production in an alpine heath and meadow community
Qatar University, Doha, Qatar.ORCID iD: 0000-0001-5084-850X
Institute Of Geographic Sciences And Natural Resources Research, Beijing, China.
Indian Council Of Forestry Research And Education, Dehradun, India.ORCID iD: 0000-0003-4849-775X
Ferdowsi University Of Mashhad, Mashhad, Iran.ORCID iD: 0000-0002-8671-9037
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2022 (English)In: Science of the Total Environment, ISSN 0048-9697, E-ISSN 1879-1026, Vol. 836, article id 155450Article in journal (Refereed) Published
Abstract [en]

Alpine and polar regions are predicted to be among the most vulnerable to changes in temperature, precipitation, and nutrient availability. We carried out a seven-year factorial experiment with warming and nutrient addition in two alpine vegetation communities. We analyzed the relationship between fruit production and monthly mean, maximum, and min temperatures during the fall of the pre-fruiting year, the fruiting summer, and the whole fruit production period, and measured the effects of precipitation and growing and thawing degree days (GDD & TDD) on fruit production. Nutrient addition (heath: 27.88 ± 3.19 fold change at the end of the experiment; meadow: 18.02 ± 4.07) and combined nutrient addition and warming (heath: 20.63 ± 29.34 fold change at the end of the experiment; meadow: 18.21 ± 16.28) increased total fruit production and fruit production of graminoids. Fruit production of evergreen and deciduous shrubs fluctuated among the treatments and years in both the heath and meadow. Pre-maximum temperatures had a negative effect on fruit production in both communities, while current year maximum temperatures had a positive impact on fruit production in the meadow. Pre-minimum, pre-mean, current mean, total minimum, and total mean temperatures were all positively correlated with fruit production in the meadow. The current year and total precipitation had a negative effect on the fruit production of deciduous shrubs in the heath. GDD had a positive effect on fruit production in both communities, while TDD only impacted fruit production in the meadow. Increased nutrient availability increased fruit production over time in the high alpine plant communities, while experimental warming had either no effect or a negative effect. Deciduous shrubs were the most sensitive to climate parameters in both communities, and the meadow was more sensitive than the heath. The difference in importance of TDD for fruit production may be due to differences in snow cover in the two communities. © 2022 The Authors

Place, publisher, year, edition, pages
Amsterdam: Elsevier, 2022. Vol. 836, article id 155450
Keywords [en]
Arctic, Climate change, Cold spells, Fruit production, ITEX, Plant reproduction, Tundra
National Category
Ecology
Identifiers
URN: urn:nbn:se:hh:diva-48380DOI: 10.1016/j.scitotenv.2022.155450ISI: 000832998500003PubMedID: 35490820Scopus ID: 2-s2.0-85129369576OAI: oai:DiVA.org:hh-48380DiVA, id: diva2:1704969
Funder
Carl Tryggers foundation
Note

Funding: Carl Tryggers stiftelse för vetenskaplig forskning and Qatar Petroleum to JMA

Available from: 2022-10-20 Created: 2022-10-20 Last updated: 2022-10-24Bibliographically approved

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Jägerbrand, Annika

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