Biological and socioeconomic implications of recreational boat fishing for the management of fishery resources in the marine reserve of Cap de Creus (NW Mediterranean)

A survey of coastal recreational boat fishing was conducted in summer 2006 in the marine reserve of Cap de Creus (NW Mediterranean) to assess the biological and socioeconomic implications of this leisure activity. Recreational boat fishers employ four different fishing techniques: bottom fishing rod, fluixa, trolling and surface fishing rod. Although the targeted species depend on the fishing method used, a total of 33 fish species were identified in the catch (8 were pelagic or benthopelagic and the rest were demersal). Fishing effort was high since fishers fished an average of 4 h/day, 8 days/month and nearly 6 months/year. Apart from the highly varied exploitation of the fauna, recreational fishing in Cap de Creus has a large economic effect on the local economy since the majority of fishers were visitors who were spending holidays in one of the villages belonging to the Park, where most of expenditures related to angling activities were made. Overall, results highlight the pressure that recreational boat fishing exerts on fish communities, particularly on littoral, demersal ones. Considering these biological and socioeconomic implications, the competition between recreational and artisanal fishers for littoral resources and the low level of compliance with the current sport fishing regulations, the implementation of a comprehensive management strategy in Mediterranean costal areas is needed.     

危险度分级法对原油稳定装置的安全评价

根据《危险程度分级》标准对大庆天然气分公司原油稳定装置进行了安全评价。通过计算,确定原油稳定装置固有危险等级属二级,站场安全管理等级为优,实际危险等级为中度,并对评价出的潜在危险性提出了相应的安全措施。该方法考虑因素全面,评价结果符合现场实际情况。     

Effect of Freezing Snow Disaster on Forest Fuel and Fire Behavior in Southern China

After freezing snow disaster,stands of Pinus massoniana,Cunninghamia lanceolata. Liquidambar formosana,Cinnamomum camphora and Phyllostachys pubescens and new burned areas in Hunan Province were surveyed by setting field plots.Moisture content and fuel load were measured by sampling and fire behavior(such as rate of fire spread) was calculated.The results showed that fuel load got doubled instantly,fuel thickness enhanced,fuel continuity swelled and water content of fuel decreased as shrubs and herbs die...     

瓯海区森林火灾发生规律及其对策

根据瓯海区1990～1996年森林火灾发生的实际情况，探索其发生的规律，提出相应的对策。瓯海区森林火灾全年均有发生，主要集中在春季、最多发生在4月；从一天来看，最多发生在12～14时；引起火灾最多的人为因子是上坟烧银纸；肇事人年龄段，最多是51～60岁。因此，要搞好森林防火工作，应分别对象做好宣传工作，严禁带火源上山。     

发展过渡带地区草坪业若干问题探讨

介绍我国过渡带地区地理位置和主要植被气候特点，分析了过渡带地区草坪业存在的主要问题和促进该地区草坪业发展的主要措施。     

不同烧伤程度森林利用与恢复的观测研究

按照火灾后林木烧伤等级的不同,分幼龄林、中龄林、近成过3个龄级组按阳坡、阴坡、平坡以及沟塘4种类型分别设标准地进行观测研究,为火灾后森林是否采留提供依据,并实现森林利用价值的最大化。     

城乡过渡带主动城市化研究

针对当前城市化中的一些问题,提出转变思维方式,从农民的视角出发,以寻求城市化新的发展模式.提出了主动城市化的概念,重点对主动城市化的时空演进、意义进行了探讨,最后又提出了推进主动城市化的措施和建议.希望该研究能够丰富我国城市化的相关理论,拓展城市化的研究思路,有利于城市化战略的制定.     

松嫩草原火干扰状况研究

松嫩草原自然状态下火周期为４年，最易着火的季节—时间是每年４月和１０月，以４月份最为敏感。松嫩草原火提高的地下０．５ｃｍ处土壤温度与燃掉的可燃物量成直线正相关。燃烧指数以每年的４月份最高，大于６０，形成炙热速进火。草原火管理工作中，应着重加强对每年４月份的警戒。     

三种甘草下胚轴及子叶节区的初步研究

三种甘草维管组织在下胚轴、子叶节区内的排列形式及变化规律一致，但不同的种维管组织排列成不同形式所经过的距离有所不同。下胚轴是根和子叶间维管组织转变的过渡区，而根的初生维管组织与上胚轴的维管组织无直接的联系。在过渡区内外始式的木质部经过后生木质部分离、拉开呈一条直线的过程，然后在子叶节区靠合形成子叶的内始式木质部。在子叶节区子叶迹分化完成，上胚轴维管组织开始分化，同时在子叶迹与上胚轴维管组织之间有芽的分化。     

陕西森林火灾的发生趋势及预测方法探讨

探讨了Ｍａｒｋｏｖ转移矩阵和ＧＭ（１，１）灰色模型预测陕西森林火灾趋势的方法。并预测２０００年前，森林火灾基本处于Ｂ级稳定状态，最小级Ａ出现于１９９８年，最大级Ｃ可能出现于２０００年。