我国湿地保护法制建设的简要回顾与展望     

李媛辉  马小博  彭越 《林业资源管理》2011,(6)

回顾了我国湿地保护立法的2个阶段,总结了我国湿地保护法制建设的主要成就,分析了存在的主要问题。对出台一部国家级的湿地保护综合性立法、加大湿地保护综合协调和组织机构建设进行了展望。  相似文献   

对天然林保护工程中林业职工安置问题的思考     

刘萍  冼静贤 《林业资源管理》2011,(6)

通过对天保工程实施后林区职工的社会保障和就业等问题的深入分析,提出了解决工程区林业职工安置问题的对策。  相似文献   

北京湿地现状调查与分析   总被引：1，自引：1，他引：0  

陈海燕  张一鸣  吴丽娟 《林业资源管理》2011,(1)

通过对北京市湿地资源普查结果和湿地动态变化的分析,对水资源、湿地植物资源、湿地动物资源、湿地生态旅游资源、湿地土地资源的合理利用提出了建议。  相似文献   

自然保护区重要过渡带危机及对策研究——基于四川阿坝自治州理县马山村协议保护机制的调研     

谭静  冯杰  汪明 《林业资源管理》2011,(2)

针对自然保护区重要过渡带管理危机,引入"协议保护"机制,解决其过渡带管理错位和不到位问题。结果显示:"协议保护"机制能有效激励社区农户和社会组织共同参与自然保护区的管理,能够缓解自然保护区过渡带生物多样性危机,维护生态系统的完整性,保障其核心区和实验区的安全,弥补自然保护区管理体制的主体缺位和管理不到位等问题。  相似文献   

山西省恒山自然保护区植物种类及类型研究     

许平 《山西林业科技》2011,40(1):21-22,25

简要介绍了恒山省级自然保护区独特的地理环境和自然条件,对区内植物种类和植被类型特点进行了调研。发现在恒山自然保护区内,分布有植物84科,563种,其中国家二级保护野生珍稀植物10种以上,还有多种省级野生保护植物;根据建群植物的生活型和群落外貌特征,将保护区内植被类型分为针叶林群落、阔叶林群落、针阔混交林群落、灌丛、灌草丛、草丛、草甸7种。  相似文献   

浅谈林业的可持续发展和森林资源的保护管理   总被引：3，自引：0，他引：3  

邢玉芹 《林业科技情报》2011,43(1):16-17

从我国林业发展的现状入手,探讨了林业如何实现可持续发展的条件以及实现林业的可持续发展与森林资源保护管理之间的关系.  相似文献   

退耕还林区域中华鼢鼠防治试验   总被引：1，自引：0，他引：1  

王军  焦健 《甘肃林业科技》2011,36(3):50-51,57

通过对永登县退耕还林区域中华鼢鼠形态特征、生活习性、发生规律及危害程度的调查,采用不同的防治方法进行试验,分析结果得出:鼢鼠活动频繁时应以药剂诱杀为主要防治方法,进行大面积灭鼠;其它时间采用熏杀法和人工地箭法进行辅助防治.  相似文献   

Critical body residues (CBRs) for ecotoxicological soil quality assessment: copper in earthworms     

Wei-chun Ma 《Soil biology & biochemistry》2005,37(3):561-568

The term ‘critical body residue’ (CBR) was defined as the lowest observed total body concentration of a contaminant in an organism, which is associated with the occurrence of adverse toxic effects in either individuals or populations of a defined age or stage of development. In this study, internal toxicity thresholds were determined for copper in the clitellated adult stage of earthworms (Lumbricus rubellus and Aporrectodea caliginosa). The objective was to assess the applicability of CBRs as a practical tool in soil quality assessment of contaminated sites and as a means of a sustainable protection of earthworm fauna. Laboratory studies showed that body concentrations of Cu were generally in agreement with the chemically available CaCl₂-extractable fraction in soil, but that there was also some evidence of internal pH-related homeostatic regulation. Toxicological correlates of body Cu concentrations with adverse effects on cocoon production (fecundity) suggested an approximate sublethal internal threshold of about 40 mg kg⁻¹, with mortality occurring at about 60 mg kg⁻¹. Adult L. rubellus sampled from areas with a wide range of metal pollution showed body Cu concentrations with a minimum of 8 mg kg⁻¹ and a maximum of 60 mg kg⁻¹. Beyond this apparent physiological tolerance range, environmental management directed at optimal earthworm population survival may not be sustainable in contaminated fields. Studies of L. rubellus colonizing a metal-contaminated experimental sludge-treated field showed that a reduced rate of colonization can already be associated with an average body Cu concentration of 25 mg kg⁻¹. However, in this particular field situation mixture effects of other metals that were also present in the soil and the occurrence of avoidance behaviour during colonization may have contributed to this low internal toxicity threshold. It is concluded that the CBR approach seems to be a feasible option for use as a tool in a bioavailability-based soil quality assessment, even for essential trace metals like copper, but that further insight may be needed to establish the uncertainty and reliability of the application in environmental quality assessment and decision making.  相似文献   

Nitrogen mineralization, nitrification and denitrification potential in contrasting lowland rain forest types in Central Kalimantan, Indonesia     

R.R.E. Vernimmen  H.A. Verhoef  L.A. Bruijnzeel  H.R. Zoomer 《Soil biology & biochemistry》2007,39(12):2992-3003

Nitrogen mineralization and denitrification potential in litter were measured during a dry and a wet period in a Bornean Lowland Evergreen Rain Forest (LERF) and two nearby Heath Forests (HF) of contrasting stature. Nitrification was very low or non-existent in all forest types and ammonification was the major constituent of nitrogen (N) mineralization. Rates of net N mineralization in the HFs on infertile sandy soils were lower than in the LERF on a more nutrient-rich clay soil or other LERFs, both during dry and wet conditions. We attribute the differences to the lower litter quality in the HFs compared to LERF. When dissolved organic nitrogen (DON-N) was included, N uptake was the same (15-17 μg g⁻¹ d⁻¹) in all three forest types. We conclude that N availability is the same in all three forest types and that N deficiency is not the reason for the reduced stature of Heath Forests compared to LERF. All three-forest types had denitrifiers present in the ectorganic layers but denitrification will only play a minor role in the N-cycle as nitrification rates were very low.  相似文献   

Conservation-oriented forestry and early successional saproxylic beetles: Responses of functional groups to manipulated dead wood substrates     

H. Gibb  R.B. Pettersson  J. Hilszczański  J.P. Ball  O. Atlegrim 《Biological conservation》2006,129(4):437-450

New conservation-oriented forestry aims to maintain intact populations of forest organisms by improving the conservation value of managed forests and providing protected areas. We tested the conservation value of treatments of dead wood for assemblages of early successional saproxylic beetles. In nine areas in northern Sweden, we selected one clear-cut, one mature managed forest and one reserve. In 2001-2002, we placed three blocks of spruce logs, each containing control, burned and shaded logs and a high stump (“snag”) at each site. Saproxylic beetles emerging from the dead wood were collected using emergence traps and beetles flying close to it were collected using flight-intercept traps. After one year of exposure, assemblage composition was examined, with respect to nutritionally-defined functional groups, red-listed species and fire-favoured species. Experimental snags were most complementary to control logs, supporting different assemblages of cambium consumers and fungivores and supporting more red-listed individuals. Burned logs supported depauperate assemblages, particularly with respect to cambium consumers, while shading of logs affected assemblages of fungivores, but only on clear-cuts. Despite containing less dead wood, managed forests provided valuable habitat, supporting similar assemblages of saproxylic beetles to reserves. Most functional groups were less abundant on clear-cuts than in older forests, but fire-favoured species were more common on clear-cuts, suggesting that clear-cuts may support assemblages of species associated with natural disturbances, if suitable substrates are available. Utilization of logs by saproxylic beetles changes over time, so long-term monitoring of our experimental logs will determine their lifetime conservation value.  相似文献