Tree growth response to drought partially explains regional‐scale growth and mortality patterns in Iberian forests

Gazol, Antonio; Camarero, J. Julio; Sánchez‐Salguero, Raúl; Zavala, Miguel Á.; Serra‐Maluquer, Xavier; Gutiérrez, Emília; Luis, Martín de; Sangüesa‐Barreda, Gabriel; Novak, Klemen; Rozas, Vicente; Tíscar, Pedro Antonio; Linares, Juan Carlos; Castillo, Edurne Martínez del; Ribas, Montse; García‐González, Ignacio; Silla, Fernando; Camisón, Álvaro; Génova, Mar; Olano, José Miguel; Hereş, Ana‐Maria; Yuste, Jorge Curiel; Hevia, Andrea; Galván, J. Diego; Ruiz‐Benito, Paloma

doi:10.1002/eap.2589

Cited by 15 publications

(6 citation statements)

References 91 publications

(159 reference statements)

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“…Ruiz-Benito, Madrigal-González, et al, 2014). The Mediterranean climate is characterized by having at least two consecutive months of aridity in the summer (Loidi, 2017), which can lead to slower growth and higher mortality, ultimately affecting carbon storage and sequestration (Gazol et al, 2021). Our results also show that a high content of large soil particles (sand and coarse fragments) reduces carbon storage and sequestration.…”

Section: Discussionmentioning

confidence: 57%

“…This result may be due to the key role that climate plays on tree growth, recruitment, and mortality (Benito‐Garzón et al, 2013; Coll et al, 2013; Lázaro‐Lobo, Ruiz‐Benito, Lara‐Romero, et al, 2022; Ruiz‐Benito, Gómez‐Aparicio, et al, 2014; Ruiz‐Benito, Madrigal‐González, et al, 2014). The Mediterranean climate is characterized by having at least two consecutive months of aridity in the summer (Loidi, 2017), which can lead to slower growth and higher mortality, ultimately affecting carbon storage and sequestration (Gazol et al, 2021). Our results also show that a high content of large soil particles (sand and coarse fragments) reduces carbon storage and sequestration.…”

Section: Discussionmentioning

confidence: 99%

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Quantifying carbon storage and sequestration by native and non‐native forests under contrasting climate types

Lázaro-Lobo

Ruiz‐Benito

Cruz‐Alonso

et al. 2023

Global Change Biology

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Non‐native trees may have significant impacts on the carbon sink capacity of forested lands. However, large‐scale patterns of the relative capacity of native and non‐native forests to uptake and store carbon remain poorly described in the literature, and this information is urgently needed to support management decisions. In this study, we analyzed 17,065 plots from the Spanish Forest Inventory (covering c. 30 years) to quantify carbon storage and sequestration of natural forests and plantations of native and non‐native trees under contrasting climate types, while controlling for the effects of environmental factors (forest structure, climate, soil, topography, and management). We found that forest origin (non‐native vs. native) highly influenced carbon storage and sequestration, but such effect was dependent on climate. Carbon storage was greater in non‐native than in native forests in both wet and dry climates. Non‐native forests also had greater carbon sequestration than native ones in the wet climate, due to higher carbon gains by tree growth. However, in the dry climate, native forests had greater carbon gains by tree ingrowth and lower carbon loss by tree mortality than non‐native ones. Furthermore, forest type (classified by the dominant species) and natural forests versus tree plantations were important determinants of carbon storage and sequestration. Native and non‐native Pinus spp. forests had low carbon storage, whereas non‐native Eucalyptus spp. forests and native Quercus spp., Fagus sylvatica, and Eurosiberian mixed forests (especially not planted ones) had high carbon storage. Carbon sequestration was greatest in Eucalyptus globulus, Quercus ilex, and Pinus pinaster forests. Overall, our findings suggest that the relative capacity of native and non‐native forests to uptake and store carbon depends on climate, and that the superiority of non‐native forests over native ones in terms of carbon sequestration declines as the abiotic filters become stronger (i.e., lower water availability and higher climate seasonality).

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Section: Discussionmentioning

confidence: 57%

Section: Discussionmentioning

confidence: 99%

Quantifying carbon storage and sequestration by native and non‐native forests under contrasting climate types

Lázaro-Lobo

Ruiz‐Benito

Cruz‐Alonso

et al. 2023

Global Change Biology

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“…However, our study area is not an abandoned cropland, but rather a long‐managed Q. rotundifolia open woodland. In this area and over the last decades, many trees have been lost, either cut down for charcoal production (Martínez‐Fernández et al, 2015) or due to extensive tree die‐off episodes caused by extreme drought events (de Luis et al, 2010; Gazol et al, 2022), such as the one in 2014 (García de la Serrana et al, 2015). In addition, new recruitments are limited both by overgrazing of feral ungulates in the area ( Ammotragus lervia , Ovis orientalis ; Font Roja NP staff, pers.…”

Section: Methodsmentioning

confidence: 99%

On the relative importance of resource availability and habitat connectivity as drivers of soil biodiversity in Mediterranean ecosystems

et al. 2023

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Soil biota influences nutrient cycling and climate regulation and represents an important fraction of global biodiversity, yet we know very little about how this soil biota responds to habitat fragmentation and degradation of habitat quality. We studied the response of different soil trophic groups (microbes and soil fauna), and their trophic structure, to changes in their habitat derived from forest long‐term management and extensive tree die‐off in a Mediterranean ecosystem. Specifically, we evaluated changes in (i) habitat size, (ii) habitat resource availability and heterogeneity and (iii) habitat connectivity. To do this, we sampled the soil biota of 43 holm oak trees (and five open interspaces) differing in size, quality, heterogeneity, connectivity and the effect of die‐off (healthy or affected). We sorted soil biota by trophic group and related their richness to habitat characteristics. Seven of the 12 trophic groups evaluated increased their species richness with soil organic carbon content, which was the most frequently selected driver of soil biota (both microbial and faunal richness). Habitat connectivity positively affected the richness of larger organisms (fauna) and plant attributes (richness, productivity and specific leaf area) also showed significant but contrasting effects depending on the group evaluated. Due to the idiosyncratic responses of different groups, the entire trophic structure (microbes and fauna) was affected by a more complex set of factors than most trophic groups in isolation, including interactions between habitat size and resource availability or connectivity. A major factor influencing habitat resource availability was the die‐off of the dominant tree species (drastically altering tree productivity). We found weaker and more negative relationships between trophic groups under trees suffering from die‐off than beneath healthy trees, particularly between microbial rather than faunal groups. Synthesis. We provide a comprehensive assessment of the response of key members of the soil food web to habitat fragmentation and tree die‐off (landscape‐level plant–soil interactions), illustrating the major role of soil carbon, habitat connectivity and tree die‐off in driving soil biodiversity and trophic structure.

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“…This exposure, in turn, increases the importance of recovery processes in tree adaptation to increasing climate aridity, and scientific interest in tree post-drought recovery has been increasing in recent years [ 2 ]. Gymnosperms are characterized by higher vulnerability to subsequent droughts and more evident lagged drought effects (“legacy effects” [ 3 ]) compared to angiosperms [ 4 , 5 , 6 , 7 ] (an alternative point of view [ 8 , 9 ]), and ability to recover from drought can be more important for gymnosperms [ 8 ]. Therefore, studying factors determining the recovery processes in gymnosperms is of great interest and importance.…”

Section: Introductionmentioning

confidence: 99%

Abscisic Acid and Cytokinins Are Not Involved in the Regulation of Stomatal Conductance of Scots Pine Saplings during Post-Drought Recovery

et al. 2023

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Delayed or incomplete recovery of gas exchange after water stress relief limits assimilation in the post-drought period and can thus negatively affect the processes of post-drought recovery. Abscisic acid (ABA) accumulation and antagonistic action between ABA and cytokinins (CKs) play an important role in regulation of stomatal conductance under water deficit. Specifically, in pine species, sustained ABA accumulation is thought to be the main cause of delayed post-drought gas exchange recovery, although the role of CKs is not yet known. Therefore, we aimed to study the effects of ABA and CKs on recovery of stomatal conductance in greenhouse-grown 3-year-old Scots pine saplings recovering from water stress. We analysed both changes in endogenous ABA and CK contents and the effects of treatment with exogenous CK on stomatal conductance. Drought stress suppressed stomatal conductance, and post-drought stomatal conductance remained suppressed for 2 weeks after plant rewatering. ABA accumulated during water stress, but ABA levels decreased rapidly after rewatering. Additionally, trans-zeatin/ABA and isopentenyladenine/ABA ratios, which were decreased in water-stressed plants, recovered rapidly in rewatered plants. Spraying plants with 6-benzylaminopurine (0.1–100 µM) did not influence recovery of either stomatal conductance or needle water status. It can be concluded that the delayed recovery of stomatal conductance in Scots pine needles was not due to sustained ABA accumulation or a sustained decrease in the CK/ABA ratio, and CK supplementation was unable to overcome this delayed recovery.

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Tree growth response to drought partially explains regional‐scale growth and mortality patterns in Iberian forests

Abstract: Tree-ring data has been widely used to inform about tree growth responses to drought at the individual scale, but less is known about how tree growth

Cited by 15 publications

References 91 publications

Quantifying carbon storage and sequestration by native and non‐native forests under contrasting climate types

Quantifying carbon storage and sequestration by native and non‐native forests under contrasting climate types

On the relative importance of resource availability and habitat connectivity as drivers of soil biodiversity in Mediterranean ecosystems

Abscisic Acid and Cytokinins Are Not Involved in the Regulation of Stomatal Conductance of Scots Pine Saplings during Post-Drought Recovery

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