Do riparian buffer strips mitigate the impacts of clearcutting on small mammals?

We assessed the impact of clearcutting on small mammals in riparian areas and evaluated riparian buffer strips as a tool for conserving small mammals in managed forests. Over two summers, we trapped small mammals of seven species in riparian areas in southwestern British Columbia, Canada. Communities of small mammals were compared across three different habitat types: (1) clearcut to the stream bank, (2) clearcut with a 30 m riparian buffer strip, and (3) control (no logging). Species richness was significantly lower in clearcuts than in controls and buffers. On clearcut sites, creeping voles were more abundant, but red-backed voles and dusky shrews were less abundant than at the control sites. At sites with riparian buffer strips, both voles were present in numbers similar to those found in controls, but dusky shrews were less common. Significantly more deer mice and creeping voles were infested with bot flies at clearcut sites than at buffer sites, and no animals were infested at any of the control sites. Riparian reserves appear to be useful in reducing the short-term impacts of clearcutting on small mammal communities, though they do not eliminate these impacts altogether.     

Assessing the compaction susceptibility of South African forestry soils. II. Soil properties affecting compactibility and compressibility

Factors affecting the compaction susceptibility of South African forestry soils were assessed. Two traditional measures of compaction susceptibility were used: maximum bulk density (ρ_mbd) determined by the standard Proctor test, defined compactibility, and the compression index using a simple uni-axial test, defined compressibility. Soils were chosen from a broad range of geological and climatic regions and they varied greatly in texture (8 to 66 g 100 g⁻¹ clay) and organic matter content (0.26 to 5.77 g 100 g⁻¹ organic carbon). Soils showed a wide range in ρ_mbd values, from 1.24 to 2.00 Mg m⁻³, and this reflected the wide range of particle size distributions and organic matter contents of the soils. Very good correlations were achieved between measures of particle size distribution, particularly clay plus silt and both compactibility and compressibility. Both compactibility and compressibility were significantly correlated with loss-on-ignition (L_OI) which is a measure reflecting the combined effects of soil texture and organic matter on soil physical properties. Indices of compaction susceptibility were influenced more by particle size distribution than by organic carbon content. Clear effects of organic carbon on compaction behaviour were only evident for soils with low clay contents (< 25 g 100 g⁻¹. No clear relationship between compactibility and compressibility was found. Compactibility generally increased with decreasing clay plus silt content, whereas compressibility increased up to about 70 g 100 g⁻¹ clay plus silt before decreasing again. It is difficult to define compaction susceptibility solely in terms of indices of compactibility or compressibility particularly as there is no clear relationship between these two properties. A classification system for compaction risk assessment is presented, based on the relationship between compactibility (ρ_mbd) and L_OI, and between clay plus silt content and compressibility.     

永安市林业发展现状与对策

系统地分析了永安市林业现状,探讨林业发展潜力及面临的挑战,揭示林业发展中存在的主要问题,提出深化集体林权制度改革、加快后续资源培育、抓好林区山地综合开发、实施林业分类经营、切实保护森林资源,大力发展非公有制林业、优化林业产业结构,以科技提升林业产业发展质量等对策建议,为进一步推进林业产业的快速发展提供借鉴.     

森林经营历史对林业发展的哲学思考

文章对森林经营及林业发展历史进行了简要总结及论述,并从5个方面探讨了森林经营历史对林业发展的启示:(1)森林资源的保护和林业的发展是矛盾与对立统一的辩证关系.(2)森林资源的保护和林业的发展应积极发挥人的主观能动性.(3)注重森林资源保护的客观普遍联系.(4)提升森林资源经营管理水平,推动林业快速有序的发展,是全社会所关注的主题,需要抓住矛盾的主要方面,探索保护森林资源最有效的途径.(5)世界各国应该互帮互助,共同发展世界林业,构建全球生态和谐.     

新时期江西林业的定位

结合江西省情、林情，从生态、社会、经济可持续发展角度，论述了江西林业以生态建设为主体，建好两个基地，发展一个产业的新定位。     

宜黄县退耕还林工程建设进展

宜黄县在退耕还林工程建设中，形成了一套行之有效的方法和措施，仅一年时间，就完成坡耕地退耕2047hm^2，荒山造林1667hm^2。     

江西省林权现状与改革对策

从江西省林权发展现状着手，分析目前江西林权制度存在的主要问题，并提出相应的改革对策。     

林业向可持续发展过渡的阶段划分理论研究

根据马克思主义经济学和西方经济学关于经济社会发展阶段划分理论,对林业向可持续发展过渡进行了阶段划分,确定了划分标准和各阶段的区别.     

河南林业司法鉴定中存在的问题与对策

分析了河南省林业司法鉴定在处理林业资源纠纷中的重要意义。探讨了当前林业司法鉴定中存在的问题及对策。     

旅游活动对森林生态系统结构和功能的负面影响

自1950年代以来，森林旅游业发展迅速，大量的游客涌入森林给森林生态系统带来了巨大的压力和严重影响。从生态系统演替、物种组成、营养结构、物质循环、能量流动、信息传递等方面探讨了旅游活动对森林生态系统的影响，并对减小旅游干扰对森林生态系统的破坏，实现森林生态系统健康、可持续地发展提出了一些建议。