浙江省九龙山国家级自然保护区珍稀濒危植物调查研究

初步调查结果表明 :九龙山国家级自然保护区有珍稀濒危植物 2 4种 ,隶属于 18科 2 2属。其中 ,国家 1级保护植物 2种 ,国家 2级保护植物 13种。这些珍稀濒危植物资源起源古老 ,种类丰富 ,组成多样 ,有较明显的温带性质 ,特有现象突出 ,并有广泛用途和巨大价值。     

图牧吉自然保护区白鹤秋季觅食地生境初步研究

2004年8～9月采用定点观察法、GPS定位法和样方法对内蒙古扎赉特旗图牧吉国家级自然保护区白鹤的秋季停歇期的觅食地生境进行了调查研究,数据分析结果显示：在201个实验样方和201个对照样方中,苔草高度、芦苇高度、香蒲高度、植被盖度和植被密度的t值均小于0．05,存在显著或极显著差异;另外,主成分分析结果显示,前4个主成分的累积贡献率达到56．652％,在第一主成分中,水稗草高度和水流状况的贡献率较高;在第二主成分中,水深和水透明度的贡献率较高;在第三主成分中,香蒲高度和植被密度的贡献率较高：在第4主成分中,苔草高度的贡献率较高。     

阴山山脉中段九峰山自然保护区大型真菌调查初报

通过对九峰山自然保护区的专项调查,共获得大型真菌标本289号,根据Hawksworth和G.C.Alnsworth等(1983年)的分类系统,真菌中文名主要引用科学出版社出版《真菌名词及名称》和《中国真菌总汇》中使用的中文名,初步鉴定出95种,隶属于2个亚门4纲11目34科68属,其中食用菌49种,药用菌21种,毒菌12种,木腐菌32种,菌根菌5种;尚有部分标本因文献资料缺乏未能确定分类地位,有待进一步研究补充。     

哈纳斯自然保护区兽类区系与分布特征

本文以阿勒泰地区哈纳斯国家级自然保护区兽类为主,初步分析了其在调查区各生态地理单元中的组成,分布特点和区系成份等。     

哈纳斯国家级自然保护区石蕊科地衣的研究

在哈纳基区地衣研究的基础上,主要分析石蕊科,地衣的地理区系成分、生态分类,并对保护区环境保护,发展旅游业,生物资源开发与保护和生物多样生研究提供了科学依据与参考。     

南岭国家级自然保护区种子植物区系分析

报道了南岭国家级自然保护区种子植物区系的组成与特点。调查结果表明,该区系的种类丰富,计有种子植物１７５科８２２属２２９２种,其中裸子植物９科２０属３０种,被子植物１６６科８０２属２２６２种。区系的地理成分复杂,具有中国１５个种子分布区类型的１４个,世界其它地区的植物成分均有一定联系,其中热带成分占明显优势,同时也受到温带成分较强烈的影响,有３３个中国特有分布属。本区系具有源远源流长的发生发展历史,     

Effect of temperature on energetic demands during the last stages of embryonic development and early life of Octopus vulgaris (Cuvier, 1797) paralarvae

This study describes the effect of seasonal average temperatures (14 and 18°C) in the Ría of Vigo, on the utilization of external yolk over the last five Naef stages of development (XV–XX) for Octopus vulgaris embryos. Also, the transference of the outer yolk to the inner yolk sac, and its use during embryonic development and early life by O. vulgaris paralarvae. Temperature had a marked effect on embryonic development, except during stages XV–XIX (until the second inversion) where development time was the same (14 days), regardless of temperature. There were no significant differences in outer yolk decrease between consecutive Naef stages at 14°C and 18°C. Contrary, significant differences at all Naef stages from XV to XIX (both, with or without outer yolk) were observed for inner yolk between temperatures. A higher accumulation of inner yolk in embryos at 14°C was observed, due to lower yolk consumption. Paralarvae incubated at both temperatures were maintained independently at starvation during 4 days. At 18°C, a reduced accumulation of inner yolk, especially during Naef stage XIX, was observed. In 24 h old paralarvae, there was already significant higher inner yolk content at 14°C than at 18°C. Unfed paralarvae at 18°C lost weight faster than those at 14°C, due to higher energetic requirements. Finally, from these results, we propose a paralarvae rearing protocol during the first days after hatching and during the last five Naef stage (XV–XX) at lower temperatures, since the energy requirements are lower during the initial maturation stage.     

森林生态效益及其保护措施探析

从介绍森林生态系统特点出发,论述了森林生态效益,并详细阐述了森林生态系统保护及恢复措施。     

茂兰保护区珍稀濒危植物掌叶木资源调查

于2012~2014年采用样带法对22条样带开展掌叶木资源调查。结果表明,茂兰保护区野生掌叶木现存量为37 809~66 917株之间的估计值,平均3.703 2株/hm2,最大胸径57 cm,最高16 m;分布海拔上限906 m;野生种群生长良好,受危害因子主要是村民生产活动带来的少量薪柴及家具用材;掌叶木为林区优势建群种,分布格局从次生林到原始森林均有分布,以次生林多见。另外,掌叶木野生种群幼苗严重不足,种群呈衰退趋势,并多处出现克隆繁殖现象。     

Categorization of grazing systems to aid the development of land use policy in Aragon,Spain

Ruminant livestock depends primarily on forage and grazing resources from both natural pastures and from cultivated land. Low‐input large‐scale grazing systems constitute a substantial part of what is termed High Nature Value farmland in Europe. Developing a typology of categories of livestock systems within a region is an important step in understanding land uses that involve ruminant livestock systems and their use of feed resources, and in appraising policy options. This study developed a typology based on the municipalities of the region of Aragon in the north‐east of Spain on the basis of the feed resources for ruminant livestock. A clustering analysis was applied to the following three types of criteria: (i) crop types; (ii) vegetation types of uncultivated land and (iii) stocking rate of dairy cattle, beef cattle, sheep and goats. A total of thirty‐nine variables were used. The cluster methodology allowed relatively homogeneous groups of municipalities, termed territories, with differentiating characteristics to be obtained. A Geographic Information System was applied to locate spatially the territories. From the twelve territories identified, it was concluded that there was a low use of natural pastures and high use of resources of cultivated origin in livestock systems in Aragon.