Biomass Accumulation in Forests With High Pressure of Fuelwood Extraction in Chiapas, Mexico

Aryal, Deb Raj; Corzo, R.R. Fatimo; Cruz, Alonso López; Sanabria, Carlos Velázquez; Castro, Heriberto Gómez; Hernández, Francisco Guevara; Ruíz, René Pinto; Venegas, José Apolonio Venegas; Coss, Alejandro Ley de; Ruiz, Danilo Enrique Morales; Euán, Isaí

doi:10.1590/1806-90882018000300007

Cited by 4 publications

(1 citation statement)

References 12 publications

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“…Esta diversidad de condiciones se ha generado por el uso rotativo de la tierra. Lo que es una situación común en la Península de Yucatán y en otras partes del Sur-Sureste mexicano (Aryal et al 2018, Morales-Ruiz et al 2021, Hernández-Dzib et al 2021. Debido al uso y abandono de la tierra posterior a las prácticas de roza-tumba y quema, los ecosistemas forestales se encuentran en diferentes etapas (edades) de sucesión secundaria.…”

Section: Introductionunclassified

Densidad de madera de especies arbóreas dominantes de la selva tropical subperennifolia de Calakmul, México

Chan-Coba¹,

Jong²,

González-Valdivia³

et al. 2022

Ecosist. Recur. Agropec.

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La densidad de madera es un parámetro fundamental para la estimación precisa de biomasa arbórea en ecosistemas forestales. La selva subperennifolia del sureste mexicano se caracteriza por la alta diversidad arbórea, por lo cual es necesario estudiar las variaciones de densidad de madera. El objetivo del estudio fue determinar la variación de densidad de madera de las especies dominantes de la selva subperennifolia y generar modelos de regresión con el grosor diamétrico de madera. Se colectaron 3 260 muestras de madera de 23 especies, en tres categorías diamétricas (gruesa, mediana y delgada). Se midió el volumen de madera con la técnica de desplazamiento de fluidos y se determinó la masa seca en un horno a 70 ºC por 72 horas. La densidad de madera secalculó como la proporción de masa entre volumen. La densidad de madera varió significativamente entre las especies, siendo la mayor Gymnanthes lucida Sw., con 0.85 g/cm3 y la menor Bursera simaruba (L.) Sarg, con 0.37 g/cm3. El análisis de regresión demostró que 20 de 23 especies presentaron una relación positiva entre la densidad de madera y el tamaño diamétrico. Se concluyó que la densidad de la madera varia por especies y tamaño diamétrico del árbol en estos ecosistemas forestales. Los resultados son útiles para modelar la dinámica de acumulación de biomasa arbórea de la vegetación primaria y secundaria que se encuentra enconstantes cambios en su estructura y composición de especies.

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Section: Introductionunclassified

Densidad de madera de especies arbóreas dominantes de la selva tropical subperennifolia de Calakmul, México

Chan-Coba¹,

Jong²,

González-Valdivia³

et al. 2022

Ecosist. Recur. Agropec.

View full text Add to dashboard Cite

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Silvopastoral systems and remnant forests enhance carbon storage in livestock-dominated landscapes in Mexico

Aryal

Morales-Ruiz

López-Cruz

et al. 2022

Sci Rep

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A large area of the terrestrial land surface is used for livestock grazing. Trees on grazing lands provide and can enhance multiple ecosystem services such as provisioning, cultural and regulating, that include carbon sequestration. In this study, we assessed the above- and belowground carbon stocks across six different land-uses in livestock-dominated landscapes of Mexico. We measured tree biomass and soil organic carbon (SOC) stocks in fodder banks, live fences, pasturelands with dispersed trees, secondary forests, and primary forests from three different geographical regions and compared them with conventional open pasturelands respectively. We also calculated tree diversity indices for each land-use and their similarity with native primary forests. The aboveground woody biomass stocks differed significantly between land-uses and followed the gradient from less diverse conventional open pasturelands to silvopastoral systems and ecologically complex primary forests. The SOC stocks showed a differential response to the land-use gradient dependent on the study region. Multivariate analyses showed that woody biomass, fine root biomass, and SOC concentrations were positively related, while land-use history and soil bulk density showed an inverse relationship to these variables. Silvopastoral systems and forest remnants stored 27–163% more carbon compared to open pasturelands. Our results demonstrate the importance of promoting appropriate silvopastoral systems and conserving forest remnants within livestock-dominated landscapes as a land-based carbon mitigation strategy. Furthermore, our findings also have important implications to help better manage livestock-dominated landscapes and minimize pressures on natural protected areas and biodiversity in the hotspots of deforestation for grassland expansion.

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Grazing intensity in grassland ecosystems: implications for carbon storage and functional properties

Aryal

2022

CABI Reviews

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Grazing lands cover more than one-third of the terrestrial land surface and are still expanding. The intensity of grazing is also growing with time due to the increase in the number of animals per unit of land or the duration of herbivory. Changes in grazing intensity exert strong pressure on ecosystem functioning, including carbon (C) sequestration. Grazing response to ecosystem C retention can be explained by the changes in biogeochemical processes that regulate C fluxes. Here, we summarized the ecosystem functional properties that affect C storage in grasslands as a result of changing grazing intensities. We synthesized 151 published studies globally and discussed the changes in different ecosystem functional property responses to grazing. High-intensity grazing mostly decreased C storage while light- to moderate-intensity grazing optimized the trade-offs between C sequestration and animal production. The synthesis showed that 86% of the studies reported either an increase or no change in SOC stocks under light grazing while under heavy grazing, 74% of the studies reported a significant decrease in SOC stocks. We also discussed the changes in ecosystem functional properties whereby grazing affects C sequestration. Some of them include: the changes in net primary productivity, soil organisms, enzymatic activity, soil respiration, and the complex interactions of these processes with climate change. Grassland management practices should be ecosystem-specific to ensure optimum production and enhance C sequestration. It is also important to understand the time factor (hysteresis), especially on how long it takes to sequester a certain amount of C from grassland management practices.

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Biomass Accumulation in Forests With High Pressure of Fuelwood Extraction in Chiapas, Mexico

Cited by 4 publications

References 12 publications

Densidad de madera de especies arbóreas dominantes de la selva tropical subperennifolia de Calakmul, México

Densidad de madera de especies arbóreas dominantes de la selva tropical subperennifolia de Calakmul, México

Silvopastoral systems and remnant forests enhance carbon storage in livestock-dominated landscapes in Mexico

Grazing intensity in grassland ecosystems: implications for carbon storage and functional properties

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