Resilience Assessment of Lowland Plantations Using an Ecosystem Modeling Approach

Chia-Hsin Wu, Yueh-Hsin Lo, Juan A. Blanco and Shih-Chieh Chang
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Chia-Hsin Wu: Senior Vocational High School, National Taitung Junior College, 95045 Taitung, Taiwan
Yueh-Hsin Lo: Departamento Ciencias del Medio Natural, Universidad Pública de Navarra, Campus de Arrosadía, Pamplona, Navarra 31006, Spain
Juan A. Blanco: Departamento Ciencias del Medio Natural, Universidad Pública de Navarra, Campus de Arrosadía, Pamplona, Navarra 31006, Spain
Shih-Chieh Chang: Department of Natural Resources and Environmental Studies, National Dong Hwa University, 97401 Hualien, Taiwan

Sustainability, 2015, vol. 7, issue 4, 1-22

Abstract: As afforestation programs of former farmlands take hold in Taiwan to achieve a variety of ecological and socio-economic values, it is becoming necessary to define best forest management. Hence, we simulated mixed stands of Cinnamomum camphora and Fraxinus griffithii planted through a gradient of soil fertility and varying camphor/ash density ratios, but maintaining a fixed total stand density of 1500 trees ha −1 . Total stand productivity was slightly lower in mixed stands than the combination of both monocultures in rich and poor sites. Maximum negative yield surpluses for 50-year old stands were 7 Mg ha −1 and 6 Mg ha −1 for rich and poor sites with a 1:1 camphor laurel/ash ratios. Maximum stand woody biomass in rich sites was reached in camphor laurel monocultures (120 Mg ha −1 ) and in poor sites for Himalayan ash monocultures (58 Mg ha −1 ). However, for medium-quality sites, a small yield surplus (11 Mg ha −1 ) was estimated coinciding with a maximum stand woody biomass of 95 Mg ha −1 for a 1:1 camphor laurel/ash density ratio. From an ecological resilience point of view, rotation length was more important than stand composition. Long rotations (100 years) could improve soil conditions in poor sites. In rich sites, short rotations (50 years) should be avoided to reduce risks or fertility loss.

Keywords: mixed forests; artificial forest; ecological modeling; resilience; ecological sustainability; camphor laurel; Himalayan ash; FORECAST model (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2015
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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