Yield decline in Chinese-fir plantations: a simulation investigation with implications for model complexity

Bi, Jianping; Blanco, Juan A.; Seely, Brad; Kimmins, J. P.; Ding, Yulong; Welham, Clive

doi:10.1139/x07-018

Cited by 107 publications

(105 citation statements)

References 27 publications

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“…Además, para crear las condiciones de inicio de las simulaciones es necesario simular las condiciones históricas conocidas o la pauta de perturbaciones naturales de los bosques a simular. Una discusión más detallada de este procedimiento de generación de las condiciones iniciales puede encontrarse en Seely et al (2002) y Blanco et al (2007.…”

Section: Materials Y Métodos El Modelo Forecastunclassified

“…Además, en el escenario BIO, parte de la capa de hojarasca es considerada como un producto del manejo y retirada del bosque, y en consecuencia hay menos biomasa que puede descomponerse e incorporarse posteriormente a la materia orgánica del suelo (Ballard, 2000). Esto puede llevar a importantes pérdidas de nutrientes a largo plazo (Switzer et al, 1981;Bi et al, 2007).…”

Section: J a Blanco Y E González / Forest Systems (2010) 19(2) 24unclassified

“…El concepto de turno ecológico, definido como el tiempo requerido por un elemento del ecosistema para recuperarse tras una perturbación hasta un nivel cercano al original, proporciona un marco útil para analizar los efectos a largo plazo del manejo forestal sobre la productividad del suelo forestal . Resultados previos en plantaciones tropicales apoyan este argumento e indican que el descenso de productividad tras varios turnos es acumulativo y no lineal (Fox, 2000;Bi et al, 2007;Blanco y González, 2010).…”

Section: J a Blanco Y E González / Forest Systems (2010) 19(2) 24unclassified

“…En plantaciones sub-tropicales, el sotobosque puede ser un competidor muy agresivo, especialmente en las primeras fases del turno cuando los árboles son pequeños (Bi et al, 2007). Aunque la masa total de sotobosque es mucho menor que la de los pinos, está compuesta mayoritariamente por material foliar, raíces finas y tallos verdes, de gran concentración de nutrientes.…”

Section: J a Blanco Y E González / Forest Systems (2010) 19(2) 24unclassified

“…Este modelo ha sido utilizado en varios estudios de sostenibilidad del manejo forestal (Morris et al, 1997, Bi et al, 2007 y se han llevado a cabo rigurosas pruebas de validación de la actuación del modelo bajo distintas condiciones, comparando las predicciones del modelo frente a datos de campo independientes Seely et al, 2008), y en concreto ha sido validado para las plantaciones de P. caribaea en Cuba (Haynes et al, 2006;Blanco y González, 2010).…”

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The legacy of forest management in tropical forests: analysis of its long-term influence with ecosystem models

Blanco

González

2010

For. syst.

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IntroducciónLas perturbaciones son parte integral de las características de un ecosistema, y la mayoría de los bosques están sometidos a varios regimenes de perturbaciones que tienen lugar a diferentes escalas espaciales y temporales (Holling et al., 1995;Turner et al., 1998 ResumenEl manejo forestal puede cambiar atributos clave del ecosistema, afectando al crecimiento de los árboles mucho después del cese de las actividades forestales. En este trabajo se ha explorado la influencia del manejo en la recuperación ecológica de plantaciones de Pinus caribaea Morelet en el occidente cubano por medio del modelo ecosisté-mico FORECAST. Se simularon tres manejos diferentes: producción de biomasa, de fibra y de madera, difiriendo en la duración del turno y en la intensidad de la retirada de biomasa. Nuestros resultados muestran que la producción de biomasa puede producir una degradación del ecosistema que necesitaría varios siglos para recuperar su estado inicial. Esta recuperación sería más rápida si la plantación se destina a la producción de fibra, y si el objetivo es madera el ecosistema podría mantener unas condiciones similares a las existentes antes de la intervención humana. En conclusión, nuestros resultados muestran cómo el legado del manejo forestal puede ser un factor clave en acelerar o retrasar la recuperación de los ecosistemas forestales, dependiendo de la intensidad de la explotación. Estos resultados también muestran la utilidad de los modelos ecológicos de manejo forestal para analizar diferentes escenarios alternativos de manejo y sus efectos a largo plazo sobre el ecosistema forestal.Palabras clave: legados ecológicos, plantaciones forestales, emulación de perturbaciones, modelo ecológico, FORECAST, Cuba, Pinus caribaea. AbstractThe legacy of forest management in tropical forests: analysis of its long-term influence with ecosystem models Forest management can modify key ecosystem attributes, affecting tree growth long after the end of forest management. Long-term influence of current management on forest recovery has been explored with the FORECAST model in Pinus caribaea Morelet plantations in western Cuba. Management for three different products was simulated: biomass, fibre and timber, with differences in rotation length and harvest intensity. Our results show that biomass production can produce ecosystem degradation that may need centuries to recover. If f ibre is the objective of management, ecosystem recovery would be faster than managing for bioenergy. However, only if timber is the final objective the ecosystem might be able to keep similar conditions to the natural forest. In conclusion, our results show that forest management legacies can be a key factor in accelerating or delaying forest ecosystem recovery, depending on the exploitation intensity. These results also show the utility of ecosystem-level management models to analyze alternative management scenarios and their long-term effects on forest ecosystems.

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Section: Materials Y Métodos El Modelo Forecastunclassified

Section: J a Blanco Y E González / Forest Systems (2010) 19(2) 24unclassified

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The legacy of forest management in tropical forests: analysis of its long-term influence with ecosystem models

Blanco

González

2010

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Large Ecosystem Service Benefits of Assisted Natural Regeneration

et al. 2018

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China manages the largest monoculture plantations in the world, with 24% being Chinese fir plantations. Maximizing the ecosystem services of Chinese fir plantations has important implications in global carbon cycle and biodiversity protection. Assisted natural regeneration (ANR) is a practice to convert degraded lands into more productive forests with great ecosystems services. However, the quantitative understanding of ANR ecosystem service benefits is very limited. We conducted a comprehensive field manipulation experiment to evaluate the ANR potentials. We quantified and compared key ecosystem services including surface runoff, sediment yield, dissolved organic carbon export, plant diversity, and aboveground carbon accumulation of ANR of secondary forests dominated by Castanopsis carlesii to that of Chinese fir and C. carlesii plantations. Our results showed that ANR of C. carlesii forest reduced surface runoff and sediment yield up to 50% compared with other young plantations in the first 3 years and substantially increased plant diversity. ANR also reduced the export of dissolved organic carbon by 60–90% in the first 2 years. Aboveground biomass of the young ANR forest was approximately 3–4 times of that of other young plantations, while aboveground biomass of mature ANR forests was approximately 1.4 times of that of mature Chinese fir plantations of the same age. If all Chinese fir plantations in China were replaced by ANR forests, potentially 0.7 Pg more carbon will be stored in aboveground in one rotation (25 years). The results indicate that ANR triggers positive feedbacks among soil and water conservation, biodiversity protection, and biomass accumulation and thereby enhances ecosystem services.

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A broadleaf species enhances an autotoxic conifers growth through belowground chemical interactions

Xia

Kong

Chen

et al. 2016

Ecology

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Plants may affect the performance of neighboring plants either positively or negatively through interspecific and intraspecific interactions. Productivity of mixed-species systems is ultimately the net result of positive and negative interactions among the component species. Despite increasing knowledge of positive interactions occurring in mixed-species tree systems, relatively little is known about the mechanisms underlying such interactions. Based on data from 25-year-old experimental stands in situ and a series of controlled experiments, we test the hypothesis that a broadleaf, non-N fixing species, Michelia macclurei, facilitates the performance of an autotoxic conifer Chinese fir (Cunninghamia lanceolata) through belowground chemical interactions. Chinese fir roots released the allelochemical cyclic dipeptide (6-hydroxy-1,3-dimethyl-8-nonadecyl-[1,4]-diazocane- 2,5-diketone) into the soil environment, resulting in self-growth inhibition, and deterioration of soil microorganisms that improve P availability. However, when grown with M. macclurei the growth of Chinese fir was consistently enhanced. In particular, Chinese fir enhanced root growth and distribution in deep soil layers. When compared with monocultures of Chinese fir, the presence of M. macclurei reduced release and increased degradation of cyclic dipeptide in the soil, resulting in a shift from self-inhibition to chemical facilitation. This association also improved the soil microbial community by increasing arbuscular mycorrhizal fungi, and induced the production of Chinese fir roots. We conclude that interspecific interactions are less negative than intraspecific ones between non-N fixing broadleaf and autotoxic conifer species. The impacts are generated by reducing allelochemical levels, enhancing belowground mutualisms, improving soil properties, and changing root distributions as well as the net effects of all the processes within the soil. In particular, allelochemical context alters the consequences of the belowground ecological interactions with a novel mechanism: reduction of self-inhibition through reduced release and increased degradation of an autotoxic compound in the mixed-species plantations. Such a mechanism would be useful in reforestation programs undertaken to rehabilitate forest plantations that suffer from problems associated with autotoxicity.

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Yield decline in Chinese-fir plantations: a simulation investigation with implications for model complexity

Cited by 107 publications

References 27 publications

The legacy of forest management in tropical forests: analysis of its long-term influence with ecosystem models

The legacy of forest management in tropical forests: analysis of its long-term influence with ecosystem models

Large Ecosystem Service Benefits of Assisted Natural Regeneration

A broadleaf species enhances an autotoxic conifers growth through belowground chemical interactions

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