Effects of climate change on litter decomposition in a mixed oak forest under decline

Comunicación presentada en el Working Group "Integrated Protection in Oak Forests" Proceedings of the Meeting at Oeiras (Portugal), 08 - 11 October, 2019.- Enlace Web https://www.iobc-wprs.org/members/shop_en.cfm?mod_Shop_detail_produkte=407

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Main Authors: Homet, Pablo, Gómez Aparicio, Lorena, Matías Resina, Luis, Godoy, Óscar
Format: comunicación de congreso biblioteca
Published: International Organisation for Biological and Integrated Control 2020
Online Access:http://hdl.handle.net/10261/235199
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spelling dig-irnas-es-10261-2351992021-06-21T12:25:01Z Effects of climate change on litter decomposition in a mixed oak forest under decline Homet, Pablo Gómez Aparicio, Lorena Matías Resina, Luis Godoy, Óscar Comunicación presentada en el Working Group "Integrated Protection in Oak Forests" Proceedings of the Meeting at Oeiras (Portugal), 08 - 11 October, 2019.- Enlace Web https://www.iobc-wprs.org/members/shop_en.cfm?mod_Shop_detail_produkte=407 Litter decomposition is a fundamental process for biogeochemical cycles in forest ecosystems. Among the main drivers of litter decomposition, several studies have shown that the key activity of soil fauna is modulated by climatic conditions, which implies that climate change is likely to modify this relationship. However, the magnitude and sign of this effect are yet unclear. Here, we performed a litter decomposition study for two Quercus tree species under natural conditions in a mixed forest in Southern Spain, where we established 6 permanent 15 × 20 m plots, and experimentally simulated a reduction in 30% of total rainfall in half of them. We used two types of litterbags with different mesh sizes to allow and exclude mesofauna, and filled them with dried litter of the two dominant tree species, Quercus suber and Q. canariensis. Litterbags were placed under every adult tree within the plots, and litter mass loss was estimated after 3, 9 and 18 months (2 bags, 3 times, 43 trees = 258 litterbags). We then performed a linear mixed-effect model to test the single effects and interactions between rainfall reduction, fauna exclusion and tree species on litter mass loss. Litter fauna was extracted using the Tullgren funnel method, identified and classified to trophic groups (decomposers and predators). Our results showed that the experimental rainfall reduction produced changes on faunal composition that could alter litter decomposition dynamics. Rainfall reduction, faunal exclusion and tree species significantly affected litter mass loss (litter mass × time interaction). We also detected some interactive effects between factors with interesting implications for litter decomposition. Unexpectedly, drier conditions accelerated litter decomposition rates of both Quercus species at some stages of the process, and the presence of mesofauna enhanced this process by 6%. Regarding tree species, the temporal dynamics were different, as Q. canariensis litter C decayed faster under rainfall reduction in the second part of the process in presence and absence of mesofauna. In contrast, Q. suber litter C decomposed faster at rainfall reduction in the first stages, decreasing its rates after 9 months. At the end of the experiment, the litter of Q. suber had larger C losses in control conditions, but the presence of mesofauna reduced these differences, showing its important role in modulating the relationship between climate and decomposition process. Our results suggest that climate change will have an important role in litter decomposition, potentially speeding-up biogeochemical cycles, but this effect is eventually influenced by soil fauna activity in litter decomposition 2021-03-18T09:30:24Z 2021-03-18T09:30:24Z 2020 2021-03-18T09:30:25Z comunicación de congreso http://purl.org/coar/resource_type/c_5794 isbn: 978-92-9067-337-8 IOBC-WPRS Bulletin 152: 8-14 (2020) http://hdl.handle.net/10261/235199 Sí none International Organisation for Biological and Integrated Control
institution IRNAS ES
collection DSpace
country España
countrycode ES
component Bibliográfico
access En linea
databasecode dig-irnas-es
tag biblioteca
region Europa del Sur
libraryname Biblioteca del IRNAS España
description Comunicación presentada en el Working Group "Integrated Protection in Oak Forests" Proceedings of the Meeting at Oeiras (Portugal), 08 - 11 October, 2019.- Enlace Web https://www.iobc-wprs.org/members/shop_en.cfm?mod_Shop_detail_produkte=407
format comunicación de congreso
author Homet, Pablo
Gómez Aparicio, Lorena
Matías Resina, Luis
Godoy, Óscar
spellingShingle Homet, Pablo
Gómez Aparicio, Lorena
Matías Resina, Luis
Godoy, Óscar
Effects of climate change on litter decomposition in a mixed oak forest under decline
author_facet Homet, Pablo
Gómez Aparicio, Lorena
Matías Resina, Luis
Godoy, Óscar
author_sort Homet, Pablo
title Effects of climate change on litter decomposition in a mixed oak forest under decline
title_short Effects of climate change on litter decomposition in a mixed oak forest under decline
title_full Effects of climate change on litter decomposition in a mixed oak forest under decline
title_fullStr Effects of climate change on litter decomposition in a mixed oak forest under decline
title_full_unstemmed Effects of climate change on litter decomposition in a mixed oak forest under decline
title_sort effects of climate change on litter decomposition in a mixed oak forest under decline
publisher International Organisation for Biological and Integrated Control
publishDate 2020
url http://hdl.handle.net/10261/235199
work_keys_str_mv AT hometpablo effectsofclimatechangeonlitterdecompositioninamixedoakforestunderdecline
AT gomezapariciolorena effectsofclimatechangeonlitterdecompositioninamixedoakforestunderdecline
AT matiasresinaluis effectsofclimatechangeonlitterdecompositioninamixedoakforestunderdecline
AT godoyoscar effectsofclimatechangeonlitterdecompositioninamixedoakforestunderdecline
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