基于旅游非优区理论的森林公园旅游发展探讨——以陕西省翠峰山森林公园为例

基于旅游非优区理论,探讨了旅游非优区研究进展、优化路径,以陕西省翠峰山森林公园为例,分析了翠峰山的非优表现,总结出由"生态、创新、主题、本土、休闲、体验"六环节构成的公园旅游优化发展模式.森林公园非优区的旅游发展应突破传统的资源导向模式,结合市场需求与特点,以休闲经济和度假旅游为导向,合理定位、重新组合,开发休闲旅游资源,打造差异化的特色旅游产品;营造独树一帜的休闲度假环境;走出特色化的旅游管理与服务;塑造品牌化的旅游文化与形象,走不仅仅依靠资源的多向发展之路.     

种-面积曲线三种扩大样地面积的方法比较

本文以雾灵山低山区的人工油松林为例,对种-面积曲线确定植物群落最小面积时,随机设置不同面积样方、逐步扩大样地面积和随机相同面积小样方相加的三种扩大样地面积的方法进行了比较研究.随机设置不同面积样方的方法最佳,研究样地人工油松林群落最小面积为700~750 m2.种-面积曲线的最佳拟合方程为S=6.217 8×ln(2.298 0×A+1),最小面积的最佳拟合方程为A=﹛eSt6.2178-1﹜/2.2980.植物群落最小面积的确定应充分考虑群落的组成、演替等情况,应适当动态调整最小面积值.     

长白山重点国有林区森林资源动态分析--以临江林业局为例

以临江林业局为例,分析了1977—2008年长白山重点国有林区森林资源动态变化情况,并提出今后森林资源经营管理的建议.结果表明:临江林业局林业用地面积和有林地面积均呈先下降后上升趋势,林地利用效率逐渐提高.1977—1997年,天然林面积逐年大幅减少,减少率约为37%,而后逐年上升;阔叶林蓄积所占比例大幅减少,针叶林蓄积比例大幅增加,针阔混交林蓄积占比趋向合理;1987年,中龄林面积和蓄积比例均很大;2008年林分各龄组面积和蓄积占比趋向合理.     

Sm-Nd isochron age of ophiolite along northern margin of Altun Tagh Mountain and its tectonic significance

An ophiolite belt is exposed to the northern edge of Altun Tagh Mountain. Geochronological researches were made on gabbro and basalt. Sm-Nd isochron age of gabbro is (829 ± 60) Ma, while the age of gabbro mixed basalt is (949 ± 62) Ma. The dating of Sm-Nd isochron proves that ophiolite formed in (829 ± 60) Ma, which implies that the northern half of Tarim (or north Tarim Block) had been separated by an ocean from the southern half of Tarim and Qaidarn (or south Tarim Block) until (829 ± 60) Ma. The south Tarim Block could accrete to the north Tarim Block at the beginning of Sinian, thereby forming the north Altun Tagh suture. The Sinian system would be the first cover on the amalgamated Tarim craton.     

The age of Xiannü Mountain fracture belt in Three-Gorge region——A fission track study

Apatite was separated from fault-clay, fracture-cliff rock and fracture wall rock, which were collected from Huangkou fracture north to Xiannu Mountain lying 20 km southwest to Three Gorges Dam Project-Sandouping dam. The fission tract characters and their length variations of apatite show that Xiannu Mountain fracture belt was formed at (0.7 ± 0.04)Ma, but its wall rock at (25.31 ±2.8) Ma. This result and previous studies show that no activity has happened since the Holocene, and the Three Gorges Dam Project is not affected by activity of the Xiannu Mountain fracture belt.     

嘉陵江流域南充金城山森林群落的模糊数学分析

将模糊数学中的聚类法和综合评判法与常规聚类法相结合,直接从群落整体和其外部环境两个方面对嘉陵江流域南充金城山植被进行分类和排序,得到比常规方法更为精确的结果。     

陇东地区主要树种的病害研究——以甘肃太统—崆峒山自然保护区为例

研究分四个季节对甘肃太统—崆峒山自然保护区2010年10月—2013年12月的天然林优势树种——白桦(Betula platyphylla)、山杨(Populus davidiana)、山桃(Amygdalus davidiana)、华山松(Pinus armandii)的有害生物及其危害情况进行了调查研究,从78号病害标本中鉴定出植物病原真菌17种,其中子囊菌门(Ascomycota)真菌2种,担子菌门(Basidiomycota)真菌15种.调查基本反映了林区病害的种类和分布状况,为该林区天然林保护提供了依据,并为林木病害的防治研究奠定了基础.     

河南桐柏山珍稀树种资源分布及保护对策研究

通过对桐柏山珍稀树种资源的实地调查,初步查明桐柏山分布各种珍稀树种25种,其中国家一级重点保护植物1种,国家二级重点保护植物4种,河南省级重点保护植物20种.对其濒危状态进行了评估,对其致濒原因进行了分析,并针对性地提出了保护和开发利用对策.     

Temperature variability since A.D. 1837 inferred from tree-ring maximum density of <Emphasis Type="Italic">Abies fabri</Emphasis> on Gongga Mountain,China

Two tree-ring MXD (maximum latewood density) chronologies of Abies fabri were developed from the eastern slopes of Gongga Mountain, and a regional chronology (RC) was established based on the two MXD chronologies. There were significant positive correlations between the three MXD chronologies and August–September temperature, and the RC had the highest correlation (r=0.733, n=48, P<0.001) with mean August–September temperature. Based on growth-climate analyses, we reconstructed mean August–September temperature during the past 171 years for the study area. The reconstruction explained 53.5% of the instrumental temperature variance during the period 1960–2007 (F=52.8, R²_adj =52.4%). In the past 171 years, there were 22 very warm years and 23 very cold years, four cold periods (1837–1842, 1884–1891, 1899–1905 and 1984–1989) and three warm periods (1966–1973, 1916–1924 and 1876–1881). Our reconstruction was validated by other tree ring-based temperature reconstructions from the surrounding area and documented climate disaster events.