Regeneration in the understory of declining overstory trees contributes to soil respiration homeostasis along succession in a sub-Mediterranean beech forest

Rodríguez Calcerrada, Jesús and Salomón Moreno, Roberto Luis and Barba, Josep and Gordaliza, Guillermo G. and Curiel Yuste, Jorge and Magro, Carlos and Gil Sánchez, Luis Alfonso (2019). Regeneration in the understory of declining overstory trees contributes to soil respiration homeostasis along succession in a sub-Mediterranean beech forest. "Forests", v. 10 (n. 9); ISSN 1999-4907. https://doi.org/10.3390/f10090727.

Description

Title: Regeneration in the understory of declining overstory trees contributes to soil respiration homeostasis along succession in a sub-Mediterranean beech forest
Author/s:
  • Rodríguez Calcerrada, Jesús
  • Salomón Moreno, Roberto Luis
  • Barba, Josep
  • Gordaliza, Guillermo G.
  • Curiel Yuste, Jorge
  • Magro, Carlos
  • Gil Sánchez, Luis Alfonso
Item Type: Article
Título de Revista/Publicación: Forests
Date: 2019
ISSN: 1999-4907
Volume: 10
Subjects:
Freetext Keywords: successional stage; forest decline; tree old-age; old-growth forest; soil carbon; soil nitrogen; rhizosphere; root biomass
Faculty: E.U.I.T. Forestal (UPM)
Department: Sistemas y Recursos Naturales
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

Research Highlights: Tree decline can alter soil carbon cycling, given the close relationship between primary production and the activity of roots and soil microbes. Background and Objectives: We studied how tree decline associated to old age and accelerated by land-use change and increased drought in the last decades, affects soil properties and soil respiration (Rs). Materials and Methods: We measured Rs over two years around centennial European beech (Fagus sylvatica L.) trees representing a gradient of decline in a sub-Mediterranean forest stand, where the number of centennial beech trees has decreased by 54% in the last century. Four replicate plots were established around trees (i) with no apparent crown dieback, (ii) less than 40% crown dieback, (iii) more than 50% crown dieback, and (iv) dead. Results: Temporal variations in Rs were controlled by soil temperature (Ts) and soil water content (SWC). The increase in Rs with Ts depended on SWC. The temperature-normalized Rs exhibited a parabolic relationship with SWC, suggesting a reduced root and microbial respiration associated to drought and waterlogging. The response of Rs to SWC did not vary among tree-decline classes. However, the sensitivity of Rs to Ts was higher around vigorous trees than around those with early symptoms of decline. Spatial variations in Rs were governed by soil carbon to nitrogen ratio, which had a negative effect on Rs, and SWC during summer, when drier plots had lower Rs than wetter plots. These variations were independent of the tree vigor. The basal area of recruits, which was three times (although non-significantly) higher under declining and dead trees than under vigorous trees, had a positive effect on Rs. However, the mean Rs did not change among tree-decline classes. These results indicate that Rs and related soil physico-chemical variables are resilient to the decline and death of dominant centennial trees. Conclusions: The development of advanced regeneration as overstory beech trees decline and die contribute to the Rs homeostasis along forest succession.

Funding Projects

TypeCodeAcronymLeaderTitle
Madrid Regional GovernmentP2013/MAE-2760BOSSANOVALuis Gil SánchezBosques sanos y variados: gestión sostenible en sistemas forestales de la Comunidad de Madrid en el contexto del cambio global
Government of SpainCGL2017-84723-PIBERYCAUnspecifiedEl papel de las interacciones planta-microbiota en la resiliencia y colapso ante el cambio climático de encinares mediterráneos
Government of SpainMDM-2017-0714UnspecifiedUnspecifiedUnspecified
Horizon 2020665501PEGASUS-2FONDS VOOR WETENSCHAPPELIJK ONDERZOEK-VLAANDEREN[PEGASUS]², giving wings to your career

More information

Item ID: 63639
DC Identifier: http://oa.upm.es/63639/
OAI Identifier: oai:oa.upm.es:63639
DOI: 10.3390/f10090727
Official URL: https://www.mdpi.com/1999-4907/10/9/727
Deposited by: Memoria Investigacion
Deposited on: 05 Nov 2020 11:11
Last Modified: 05 Nov 2020 12:54
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