世界自然遗产湖南崀山是国家重点风景名胜区，是典型的丹霞地貌类型景区，区内旅游资源丰富，具有较高的观赏价值和科研价值，崀山的旅游开发对于促进全省完整的旅游地域系统的形成有着非常重要的作用。本文从旅游资源，环境条件，空间格局，交通条件，旅游产品，社会因素等方面进行SWOT分析，对其优势、劣势、机会和威胁进行深入研究，并在SWOT分析的基础上提出了崀山丹霞地貌风景区旅游开发的对策，以期能够提高崀山旅游开发的成功性和效益性。

Word natural heritage of Hunan Langshan mountain is national key scenic area and a typical Danxia landform types areas,which is rich in tourism resources and has high ornamental value and scientific value .Tourism development of Langshan mountain is very important to promote the formation of the regional tourism system of the whole province .So this article had analyses with SWOT from the tourist resources ,environmental conditions ,spatial pattern,transportation,tourism products,social factors,etc. the strengths ,weaknesses ,opportunities and threats have been studied deeply ,and development countermeasures have been proposed on the basis of SWOT analyses of Danxia landform scenic area tourism of Langshan mountain ,which is in order to improve success and benefit of the tourism development of Langshan mountain .

丹霞山世界地质公园位于粤北山区，具有以赤壁丹崖为特征的红色碎屑岩的“丹霞地貌”，地质构造发育，岩体受侵蚀程度严重，园区地质环境条件较为复杂。野外调查及评价认为，园区主要地质灾害为崩塌、滑坡，分布有地质灾害中易发区、低易发区和不易发区。针对该地质公园的资源禀赋和地质灾害特点，对园内地质灾害进行评价并提出地质灾害防治对策，保障当地旅游经济可持续发展。

The Danxiashan World Geopark lies in mountain area of north Guangdong and is characterized by “Danxia Landform” with non-marine red clastic rock, red wall and red cliffs. The red rock was seriously eroded due to complicated geological conditions. A geological survey indicates that main geological hazards in the geopark are rockfall and landslide. This paper gives an assessment of the geological hazards and puts forward some control measurements.

利用植物对生态环境进行监测能综合地判断生态环境变化情况。通过对黔北丹霞地貌区、香纸沟喀斯特地貌区及烂泥沟卡林型金矿区苔类、角苔类植物的比较研究,统计分析种群的分布情况。结果表明,角苔类植物主要生长于生态环境保护较好的区域,扁萼苔科、角苔科为生态环境保护较好区域监测指示科植物,蛇苔属为生态环境保护较好区域监测指示属植物,小蛇苔、蛇苔为生态环境保护较好区域监测指示种植物。

Eco-environment monitoring using plants can provide comprehensive information for determination of environmental changes. Through flora investigations of liverworts and hornworts in three substrates including Danxia Landform of north Guizhou province, Xiangzhigou Karst landform, and Lannigou Karlin Gold Mine, a close correlation was found between bryophytes flora and substrates. Hornworts mainly grew in the sites with better environmental protection. Radulaceae, Anthocerotaceae and Conocephalum could be used as indicators of better environmental protection at family and genus levels, respectively. Species of Conocephalum japonicum( Thunb. ) Grolle and C. conicum ( L. ) Dum. may be used as direct indicators for sites with better environment conditions at species level.

为了更好地了解丹霞地貌桫椤种群动态与分布格局,根据对桫椤种群的样地调查和数据统计,将桫椤个体依茎干高度分级,编制其静态生命表,绘制存活曲线、危险率函数和死亡密度函数曲线等;运用v/m,k,CA,m*/m和C共5种聚集度指标测定其种群的空间分布格局及其动态.结果表明:现阶段桫椤种群结构为衰退型,桫椤种群以中龄林为主,幼株个体数量严重缺失,种群死亡趋势是生长后期高于生长前期,在Ⅵ,Ⅶ龄级阶段出现死亡高峰;种群分布格局近似于随机分布.

In order to understand the population structure and distribution pattern of A lsophila spinulosa in Danxia landform ,a sample plot investigation was conducted in Xishui ,Guizhou ,in which the A. spinulosa trees were graded according to their height .Based on the statistical data ,a static life table of this plant species was worked out and their survivorship curve ,hazard rate function curve and mortality rate function curve were plotted .Then five aggregation indices (v/m ,K ,CA ,m*/m and C) .were used to determine the spatial distribution pattern and dynamics of the population .The results showed that at the present time the structure of the local A. spinulosa population was of the diminishing type ,middle age of stand was predominant ,and the number of young individuals was very small .The death rate of the popula‐tion was higher in the later stage than in the earlier stage ,and the peak of mortality occurred in height classes Ⅵ and Ⅶ .The population exhibited a distrib

为畜牧养殖业新型抗生素药物的研究和开发利用提供优良菌株,采用分离纯化、形态学、分子生物学和超高压液相-紫外二极管阵列-高分辨率质谱联用(UPLC-DAD-HRMS)方法对贵州赤水丹霞地貌区300份土样中的菌株进行分离鉴定。结果表明:1)在分离纯化获得的31株菌株中,有21株菌株对耐万古霉素金黄色葡萄球菌、耐甲氧西林金黄色葡萄球菌、枯草芽胞杆菌和藤黄微球菌表现出不同的抗菌活性。其中,有8株菌株表现出抗2种测试菌生物活性,1株菌株(S.sp.CSDX435)表现出抗3种测试菌生物活性,1株菌株(S.sp.CSDX416)表现出抗4种测试菌生物活性。2)有20株分离菌株与Stenotrophomonas sp.A18嗜麦芽窄食单胞菌的16SrRNA同源性达99%,为嗜麦芽窄食单胞菌(Stenotrophon onas maltophilia);11株菌株与S.sp.A18的16SrRNA同源性达78%~97%。其中,S.sp.CSDX58菌株与S.sp.A18的16SrRNA同源性最低,为78%,可能为嗜麦芽窄食单胞菌的新类群。3)从S.sp.CSDX252菌株的发酵代谢产物中发现了可能为聚醚类的新化合物B,分子式为C47H78O14,且产量较高。因此,在分离得到的31株菌株中,有21株菌株对1种或多种病原微生物表现出不同的抗菌活性,可作为畜禽新型抗生素菌株进行深入研究和开发利用。

In order to provide excellent fine strains for research,exploitation and utilization of new antibiotics in livestock breeding industry,bacterial strains in 300 soil samples from Danxia landform area in Guizhou Chishui were isolated and identified by UPLC-DAD-HRMS method.Results:1)31 strains were isolated including 2 1 strains showing various antimicrobial activity to vancomycin-resistant Staphylococcus aureus(VRSA),methicillin-resistant Staphylococcus aureus (MRSA),Bacillus subtillis and Micrococcus luteus.Eight strains were resistant to two test bacteria,one resistant to three test bacteria and one resistant to four test bacteria.2)20 isolated strains had 99% 16S rRNA homology with Stenotrophomonas sp.A18,which were identified as Stenotrophononas maltophilia;11 strains had 78%~97% 16S rRNA homology with S.sp.A18.S.sp.CSDX58 had the lowest homology with S.sp.A18,merely 78%,which might be a new population of Stenotrophomonas sp.A new compound B which might be of polyether type was found