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Non‐linear plant‐plant interactions modulate impact of extreme drought and recovery on a Mediterranean ecosystem

Haberstroh, Simon; Caldeira, Maria C.; Lobo-do-Vale, Raquel; Martins, Joana I.; Moemken, Julia ORCID iD icon 1; Pinto, Joaquim G. 1; Werner, Christiane
1 Institut für Meteorologie und Klimaforschung – Forschungsbereich Troposphäre (IMK-TRO), Karlsruher Institut für Technologie (KIT)

Abstract:
Interaction effects of different stressors, such as extreme drought and plant invasion, can have detrimental effects on ecosystem functioning and recovery after drought. With ongoing climate change and increasing plant invasion, there is an urgent need to predict the short- and long-term interaction impacts of these stressors on ecosystems.
We established a combined precipitation exclusion and shrub invasion (Cistus ladanifer) experiment in a Mediterranean cork oak (Quercus suber) ecosystem with four treatments: (1) Q. suber control; (2) Q. suber with rain exclusion; (3) Q. suber invaded by shrubs; and (4) Q. suber with rain exclusion
In an average precipitation year, the interaction effects of both stressors were neutral. However, the combination of imposed drought and shrub invasion led to amplifying interaction effects during an extreme drought by strongly reducing tree transpiration. Contrarily, the imposed drought reduced the competitiveness of the shrubs in the following recovery period, which buffered the negative effects of shrub invasion on Q. suber.
Our results demonstrate the highly dynamic and nonlinear effects of interacting stressors on ecosystems and urges for further investigations on biotic interactions in a context of climate change pressures.


Verlagsausgabe §
DOI: 10.5445/IR/1000133793
Veröffentlicht am 09.08.2021
Originalveröffentlichung
DOI: 10.1111/nph.17522
Scopus
Zitationen: 3
Dimensions
Zitationen: 7
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung – Forschungsbereich Troposphäre (IMK-TRO)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 0028-646X, 1469-8137
KITopen-ID: 1000133793
HGF-Programm 12.11.32 (POF IV, LK 01) Advancing atmospheric and Earth system models
Erschienen in The new phytologist
Verlag John Wiley and Sons
Band 231
Heft 5
Seiten 1784-1797
Vorab online veröffentlicht am 02.06.2021
Schlagwörter Cistus ladanifer (gum rockrose), ecosystem functioning, extreme drought, Quercus suber (cork oak), recovery, shrub invasion, stress interaction.
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