2) degeneration of natural vegetation
天然植被衰退
3) natural vegetation
天然植被
1.
Method for estimating ecological water requirement of natural vegetation in arid area;
干旱区天然植被生态需水量计算方法
2.
Efficiency and value of urban natural vegetation
城市天然植被的功效和价值
3.
Aiming at the issues of natural vegetation deterioration and ecological function decline, the present situation of natural vegetative and the cause of its deterioration were detected clearly by jointly adopting the methods of field investigation and related research result collection.
针对鄯善绿洲边缘带天然植被衰退、生态功能下降等问题,采用实地调查和收集相关调研成果相结合的方法,在初步查明天然植被现状及存在问题、分析退化原因的基础上,探讨了鄯善绿洲边缘带天然植被的保育途径,认为主要应从加强现有植被的保护,加强人工林的培育,采用必要的经济手段等方面来实施。
4) vegetation degradation
植被退化
1.
Effects of over-grazing on vegetation degradation of Kobresia pygmaea meadow in Nagqu, Tibet;
超载放牧对那曲地区高山嵩草草甸植被退化的影响
2.
Research on spatial pattern of human-induced vegetation degradation and restoration:a case study of Shaanxi Province
人类活动对植被退化/恢复影响的空间格局——以陕西省为例
3.
After study on vegetative structure and composition, propagule and soil of 25 vegetative ecosystems at three villages and one natural reserve in karst upland in Eastern Yunnan, we found that vegetation degradation was a gradual, anti-successional process in which species composition and propagule bank were determined by t.
植被退化是生态系统退化的最典型外在特征。
6) degraded vegetation
退化植被
1.
The degraded vegetation around Tiantong contains five types of communities,such as earlier degraded community of EBLF,deciduous broad-leaved forest community,coniferous and broad-leaved mixed forest community,conifer forest community and shrub community.
通过对退化植被各群落类型的区系分析,得出了天童地区常绿阔叶林退化群落的区系组成特征,具体如下:(1)天童及周边地区退化植被的植物区系包括72科138属204种,其物种多样性低于常绿阔叶林的成熟群落;(2)本植物区系地理成分与常绿阔叶林成熟群落一致,表现了明显的亚热带植物区系性质,是热带向温带的过渡;(3)人类的干扰导致了各退化群落中国特有成分的下降;(4)各退化群落类型与常绿阔叶林成熟群落保持了较高水平的科、属和种的相似性。
补充资料：石油天然气国际贸易(见石油市场与天然气市场)
石油天然气国际贸易(见石油市场与天然气市场)
石油天然气国际贸易(internotional tradeof011 and只as)见石油市场与天然气市场。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条