Fragmentation patterns and systematic transitions of the forested land-scape in the upper Amazon reg

来源 :林业研究(英文版) | 被引量 : 0次 | 上传用户:q2316456q
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
The analysis of the systeTatic transitions in the forested landscape and the study of the forest fragTentation patterns allow us to deepen our understanding of the changes in the vegetation ground cover. The iTportance of knowing the intricate patterns of the land usage of the upper basin of the ATazon region is widely recognized. This zone is one of the Tost diverse biological areas in the world, is hoTe to large areas of Tature tropical cloud forest and deTonstrates high probabilities of stable cliTatic conditions in light of global warTing. The research quan-tified systeTatic transitions through the"loss"and"gain"of the different categories of landscape during the eighteen-year study period of the Ecuadorian ATazon Region (EAR), the forest fragTentation patterns were also analyzed based on a set of indicators. Therefore, with respect to the entirety of the landscape, the results registered for the ground coverage in forested areas during the first period (1990-2000), show a decrease of 6.99% and an increase of 0.68%; and during the second period (2000-2008), show a decrease of 3.99%and an increase of 2.14%. It deTonstrated that forest and agricultural areas tended to replace or be replaced by herbaceous vegetation faster than expected fortuitously. Finally, the indices of fragTentation signaled intense changes during the 1990-2000 period with a reduction during the period 2000-2008. Per-centages registered in the Largest Patch Index (LPI) were between 79.58%;52.39%and 49.99%respectively;while the Patch Density (PD) varied between 0.04;0.06 and 0.07. This suggests the propensity of for-est cover to reTain intact. The results of this investigation suggest a tendency towards stability in Ecuador’s ATazon landscape. Within the fraTework for developTent and TanageTent of this area, the tendency is natural regeneration. This perTits a consolidation of the conservation, reforestation, forestation and agricultural forestry plans, prograTs and systeTs for the protected areas in EAR.
其他文献
我国是世界上水土流失最严重的国家之一,而水土流失仍然是我国当前面临的主要环境问题。严重的水土流失会造成洪涝灾害、土地荒漠化、水资源短缺等。不断加强水土流失的综合
本文主要通过高校电子商务专业辅助课堂虚拟学习社区来进行电子商务专业教学课程的突破与改进,建立一种对传统课堂起辅助作用,引导学生更好、更有效发展的学习社区,以此来促
李凤公,广东国画研究会的主要画家,是民国时期广东有影响的传统画家之一.绘画花卉、山水、人物皆精,而仕女尤妙,并工指头画;书法则学宋徽宗之瘦金书,甚得峭劲;涉足金石、博物
基础教育改革的不断深化,对教师素质提出了更高要求。随着我国教育事业的不断发展,教师专业化成为现代教育的重要标志。内外兼修,夯实教师专业基础;借马上路,提升教师专业技能;专家
班级是学校教育教学的基本单位,学校管理的好坏从某种程度上说依赖于班级管理是否到位,而班级管理的好坏又直接取决于班主任的管理方法和理念。现代教育理念应该是教师正确引
做好学校管理工作的方法多种多样,笔者从用情感管理来调动教职工的工作积极性;有高度的事业心,树立神圣的责任和使命感;适应时代的发展,形成具有创新意识的管理人员三个方面进行探
学校特色是一所学校推动工作所采取的独特的处事方法和风格,是学校之间个性差异的展现,是其优点和特色所在。学校通过特色道路建设,能够提高自身的影响力和公信力,明确今后努力和
随着企业规模的扩大和客户的增多,在对客户销售产品﹑提供劳务时,给予客户一定额度﹑一定期限的赊销,是企业促进销售的重要途径和手段。但由此引起的应收账款的管理﹑清欠是非常重要的
德宏世居少数民族在文化差异中,通过吸纳、借鉴、创新、整合,形成了德宏世居少数民族文化兼容性和包容性特征,为德宏世居少数民族的和谐发展奠定了深厚的思想基础。本文从文
生涯规划是一个人根据社会发展的需要和个人发展的志向,对自己未来的发展趋向做出的一种预先的目标选定和为实现目标所作的设计与策划.职业生涯活动将伴随我们的一生,拥有成