Mapping forest site quality at national level

Aguirre, Ana; Moreno-Fernández, Daniel; Alberdi, Iciar; Hernández, Laura; Adame, Patricia; Cañellas, Isabel; Montes, Fernando

doi:10.1016/j.foreco.2022.120043

Cited by 8 publications

(1 citation statement)

References 71 publications

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“…La calidad de sitio, en bosques, es la capacidad productiva de un área terrestre para sustentar el crecimiento del mismo (González et al, 2004;Aguirre et al, 2022), presentando en algunos casos bosques exuberantes mientras que, en otros bosques pobres (Adeyemi, 2016); asimismo, es el potencial de un determinado sitio que aporta los recursos para la producción de madera u otro producto para una especie o grupo de especies (Clutter et al, 1983;Chagas y Garcia, 2017). Estás diferencias pueden ser producto de factores edáficos, topográficos y climáticos, viéndose reflejado en las especies como también en el desarrollo estructural del bosque (Adeyemi, 2016).…”

Section: Introductionunclassified

Estimación de la calidad de sitio de Cinchona pubescens (Rubiaceae), en el bosque montano La Palma, Chota, Perú

Rufasto-Peralta,

Baselly-Villanueva,

Alva-Mendoza

et al. 2023

LIL

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El género Cinchona L. (Rubiaceae) agrupa 23 especies, de las cuales 19 se encuentran distribuidas en Perú. Pese a ser un género importante a nivel mundial, sus hábitats están siendo degradados de manera acelerada, sin contar con investigaciones sobre la calidad de sitio de estas especies, dificultando generar planes de recuperación de su hábitat. El objetivo de la investigación fue estimar la calidad de sitio de Cinchona pubescens Vahl., en el bosque montano La Palma, localizado en el distrito y provincia de Chota, región Cajamarca, Perú. Se establecieron tres parcelas circulares de 500 m2 (r =12,6 m), donde se midió la altura total y la circunferencia a la altura del pecho de los árboles. Se realizó el análisis de varianza para evaluar la existencia de clases de sitio. Se obtuvieron variables climáticas, fisiográficas y edáficas que fueron correlacionadas con la altura de los árboles, para explicar su relación; además se realizó un Análisis de Componentes Principales con el fin de explicar la variabilidad de los parámetros en estudio. Se determinó que no existe diferencia estadística entre las alturas medias de los árboles; por cuanto, todas las parcelas presentan similitud de calidad de sitio. Los factores edafoclimáticos no presentaron correlación con la altura. Sin embargo, el Análisis de Componentes Principales, evidenció que las variables edáficas influyen más que las climáticas y topográficas sobre la altura de Cinchona pubescens Vahl. Esta especie crece en suelos francos arenosos, con pH fuertemente ácido y concentraciones medias a altas de algunos elementos como materia orgánica, P, K y N.

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Section: Introductionunclassified

Estimación de la calidad de sitio de Cinchona pubescens (Rubiaceae), en el bosque montano La Palma, Chota, Perú

Rufasto-Peralta,

Baselly-Villanueva,

Alva-Mendoza

et al. 2023

LIL

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The Interplay of the Tree and Stand-Level Processes Mediate Drought-Induced Forest Dieback: Evidence from Complementary Remote Sensing and Tree-Ring Approaches

et al. 2022

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Drought-induced forest dieback can lead to a tipping point in community dominance, but the coupled response at the tree and stand-level response has not been properly addressed. New spatially and temporally integrated monitoring approaches that target different biological organization levels are needed. Here, we compared the temporal responses of dendrochronological and spectral indices from 1984 to 2020 at both tree and stand levels, respectively, of a drought-prone Mediterranean Pinus pinea forest currently suffering strong dieback. We test the influence of climate on temporal patterns of tree radial growth, greenness and wetness spectral indices; and we address the influence of major drought episodes on resilience metrics. Tree-ring data and spectral indices followed different spatio-temporal patterns over the study period (1984–2020). Combined information from tree growth and spectral trajectories suggests that a reduction in tree density during the mid-1990s could have promoted tree growth and reduced dieback risk. Additionally, over the last decade, extreme and recurrent droughts have resulted in crown defoliation greater than 40% in most plots since 2019. We found that tree growth and the greenness spectral index were positively related to annual precipitation, while the wetness index was positively related to mean annual temperature. The response to drought, however, was stronger for tree growth than for spectral indices. Our study demonstrates the value of long-term retrospective multiscale analyses including tree and stand-level scales to disentangle mechanisms triggering and driving forest dieback.

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Scaling up tree growth to assess forest resilience under increasing aridity: the case of Iberian dry-edge pine forests

Zavala,

Angulo,

de la Parra

et al. 2024

Landsc Ecol

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Context Mediterranean managed dry-edge pine forests maintain biodiversity and supply key ecosystem services but are threatened by climate change and are highly vulnerable to desertification. Forest management through its effect on stand structure can play a key role on forest stability in response to increasing aridity, but the role of forest structure on drought resilience remains little explored. Objectives To investigate the role of tree growth and forest structure on forest resilience under increasing aridity and two contrasting policy-management regimes. We compared three management scenarios; (i) “business as usual”-based on the current harvesting regime and increasing aridity—and two scenarios that differ in the target forest function; (ii) a “conservation scenario”, oriented to preserve forest stock under increasing aridity; and (iii), a “productivity scenario” oriented to maintain forest yield under increasingly arid conditions. Methods The study site is part of a large-homogeneous pine-covered landscape covering sandy flatlands in Central Spain. The site is a dry-edge forest characterized by a lower productivity and tree density relative to most Iberian Pinus pinaster forests. We parameterized and tested an analytical size-structured forest dynamics model with last century tree growth and forest structure historical management records. Results Under current management (Scenario-i), increasing aridity resulted in a reduction of stock, productivity, and maximum mean tree size. Resilience boundaries differed among Scenario-ii and -Scenario-iii, revealing a strong control of the management regime on resilience via forest structure. We identified a trade-off between tree harvest size and harvesting rate, along which there were various possible resilient forest structures and management regimes. Resilience boundaries for a yield-oriented management (Scenario-iii) were much more restrictive than for a stock-oriented management (Scenario-ii), requiring a drastic decrease in both tree harvest size and thinning rates. In contrast, stock preservation was feasible under moderate thinning rates and a moderate reduction in tree harvest size. Conclusions Forest structure is a key component of forest resilience to drought. Adequate forest management can play a key role in reducing forest vulnerability while ensuring a long-term sustainable resource supply. Analytical tractable models of forest dynamics can help to identify key mechanisms underlying drought resilience and to design management options that preclude these social-ecological systems from crossing a tipping point over a degraded alternate state.

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Mapping forest site quality at national level

Cited by 8 publications

References 71 publications

Estimación de la calidad de sitio de Cinchona pubescens (Rubiaceae), en el bosque montano La Palma, Chota, Perú

Estimación de la calidad de sitio de Cinchona pubescens (Rubiaceae), en el bosque montano La Palma, Chota, Perú

The Interplay of the Tree and Stand-Level Processes Mediate Drought-Induced Forest Dieback: Evidence from Complementary Remote Sensing and Tree-Ring Approaches

Scaling up tree growth to assess forest resilience under increasing aridity: the case of Iberian dry-edge pine forests

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