Relative humidity predominantly determines long‐term biocrust‐forming lichen cover in drylands under climate change

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dc.contributor.authorBaldauf, Selina
dc.contributor.authorPorada, Philipp
dc.contributor.authorMaestre, Fernando T.
dc.contributor.authorTietjen, Britta
dc.contributor.authorRaggio Quílez, José
dc.contributor.editorShurong Zhou
dc.date.accessioned2024-01-19T13:19:55Z
dc.date.available2024-01-19T13:19:55Z
dc.date.issued2020-12-07
dc.description.abstractAbstract Manipulative experiments typically show a decrease in dryland biocrust cover and altered species composition under climate change. Biocrust-forming lichens, such as the globally distributed Diploschistes diacapsis, are particularly affected and show a decrease in cover with simulated climate change. However, the underlying mechanisms are not fully understood, and long-term interacting effects of different drivers are largely unknown due to the short-term nature of the experimental studies conducted so far. We addressed this gap and successfully parameterised a process-based model for D. diacapsis to quantify how changing atmospheric CO2, temperature, rainfall amount and relative humidity affect its photosynthetic activity and cover. We also mimicked a long-term manipulative climate change experiment to understand the mechanisms underlying observed patterns in the field. The model reproduced observed experimental findings: warming reduced lichen cover, whereas less rainfall had no effect on lichen performance. This warming effect was caused by the associated decrease in relative humidity and non-rainfall water inputs, which are major water sources for biocrust-forming lichens. Warming alone, however, increased cover because higher temperatures promoted photosynthesis during early morning hours with high lichen activity. When combined, climate variables showed non-additive effects on lichen cover, and effects of increased CO2 levelled off with decreasing levels of relative humidity. Synthesis. Our results show that a decrease in relative humidity, rather than an increase in temperature, may be the key factor for the survival of the lichen D. diacapsis under climate change and that effects of increased CO2 levels might be offset by a reduction in non-rainfall water inputs in the future. Because of a global trend towards warmer and drier air and the widespread global distribution of D. diacapsis, this will affect lichen-dominated dryland biocrust communities and their role in regulating ecosystem functions worldwide.
dc.description.departmentDepto. de Farmacología, Farmacognosia y Botánica
dc.description.facultyFac. de Farmacia
dc.description.refereedTRUE
dc.description.sponsorshipEuropean Research Council
dc.description.sponsorshipMinisterio de Economía y Competitividad
dc.description.statuspub
dc.identifier.citationBaldauf, S., Porada, P., Raggio, J., Maestre, F. T., & Tietjen, B. (2020). Relative humidity predominantly determines long‐term biocrust‐forming lichen cover in drylands under climate change. Journal of Ecology, 109(3), 1370-1385. https://doi.org/10.1111/1365-2745.13563
dc.identifier.doi10.1111/1365-2745.13563
dc.identifier.essn1365-2745
dc.identifier.issn0022-0477
dc.identifier.officialurlhttps://doi.org/10.1111/1365-2745.13563
dc.identifier.relatedurlhttps://besjournals.onlinelibrary.wiley.com/doi/full/10.1111/1365-2745.13563
dc.identifier.urihttps://hdl.handle.net/20.500.14352/94074
dc.issue.number3
dc.journal.titleJournal of Ecology
dc.language.isoeng
dc.page.final1385
dc.page.initial1370
dc.publisherWiley
dc.relation.projectIDinfo:eu-repo/grantAgreement/647038 (BIODESERT)
dc.relation.projectIDinfo:eu-repo/grantAgreement/CTM2015-64728-C21-R (CRYPTOCOVER)
dc.relation.projectIDinfo:eu-repo/grantAgreement/PRI-PIMBDV-2011-0874
dc.relation.projectIDinfo:eu-repo/grantAgreement/408092731
dc.rightsAttribution-NonCommercial 4.0 Internationalen
dc.rights.accessRightsopen access
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/
dc.subject.cdu58
dc.subject.cdu581.1
dc.subject.keywordBiological soil crusts
dc.subject.keywordClimate change
dc.subject.keywordDew
dc.subject.keywordDiploschistes diacapsis
dc.subject.keywordDrylands
dc.subject.keywordSimulation models
dc.subject.ucmFisiología vegetal (Biología)
dc.subject.ucmBotánica (Biología)
dc.subject.unesco2417.13 Ecología Vegetal
dc.titleRelative humidity predominantly determines long‐term biocrust‐forming lichen cover in drylands under climate change
dc.typejournal article
dc.type.hasVersionVoR
dc.volume.number109
dspace.entity.typePublication
relation.isAuthorOfPublicationc3c75d15-1d76-4a66-b0dc-e5b29d68a60c
relation.isAuthorOfPublication.latestForDiscoveryc3c75d15-1d76-4a66-b0dc-e5b29d68a60c
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