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Integrating beneficiaries into assessment of ecosystem services from managed forests at the Hubbard Brook Experimental Forest,USA 被引量:2
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作者 Jesse Caputo Colin M.Beier +1 位作者 Valerie A.Luzadis Peter M.Groffman 《Forest Ecosystems》 SCIE CSCD 2016年第4期243-257,共15页
Background:Forests contribute to human wellbeing through the provision of important ecosystem services.Methods:In this study,we investigated how the perceived importance of ecosystem services may impact the overall ... Background:Forests contribute to human wellbeing through the provision of important ecosystem services.Methods:In this study,we investigated how the perceived importance of ecosystem services may impact the overall benefit provided by managed watersheds at the Hubbard Brook Experimental Forest over a 45-year period,using standardized measures of service capacity weighted by service importance weights derived from a survey of beneficiaries.Results:The capacity of watersheds to regulate water flow and quality was high in all watersheds throughout the study period,whereas cultural services such as scenic beauty declined after harvest.Impacts on greenhouse gas regulation depended on the efficiency with which harvested biomass was used.Surveys revealed that stakeholders placed high value on all ecosystem services,with regulating and cultural services seen as more important than provisioning services.When service metrics were weighted by survey responses and aggregated into a single measure,total service provision followed the same overall trend as greenhouse gas regulation.Where biomass use was less efficient in terms of greenhouse gas emissions,harvesting resulted in an overall "ecosystem service debt";where use was more efficient,this "ecosystem service debt" was reduced.Beneficiaries' educational backgrounds significantly affected overall assessment of service provision.Beneficiaries with college or university degrees incurred smaller "ecosystem service debts" and were less negatively affected by harvesting overall.Conclusions:This study highlights the importance of including empirical measures of beneficiary preference when attempting to quantify overall provision of ecosystem services to human beneficiaries over time. 展开更多
关键词 Ecosystem services Forests Long-term ecological research Hubbard Brook experimental Forest Regulating services
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NDGA ameliorates experimental autoimmune encephalomyelitis via the regulation of IL-6,IL-17 and TGF-b
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作者 李彬 《China Medical Abstracts(Internal Medicine)》 2017年第1期15-16,共2页
Objective To investigate the effets of nordihydroguaiaretic acid(NDGA)on the expression of IL-6,IL-17and TGF-βin mice with experimental autoimmune encephalomyelitis(EAE).Methods C57BL/6 mice were immunized with MOG35... Objective To investigate the effets of nordihydroguaiaretic acid(NDGA)on the expression of IL-6,IL-17and TGF-βin mice with experimental autoimmune encephalomyelitis(EAE).Methods C57BL/6 mice were immunized with MOG35-55 to induce EAE.The 54 mice were randomly and equally divided into control group,model group and treatment group.Mice in treatment 展开更多
关键词 TGF EAE IL NDGA ameliorates experimental autoimmune encephalomyelitis via the regulation of IL-6 IL-17 and TGF-b
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