In the preparation of forest inventories, the objective, so far, in most tropical countries has been to obtain volume estimates of the commercial species rather than to obtain a complete understanding of the ecological significance of the vegetational types recognised in photo-interpretation. All ...
Many rare and endangered trees that have disappeared from the state forest now exist only in these folk forests. These "worthless" trees and forests highlight the indigenous ecological economic perspective, in which the cultural significance of the forest transcends its instrumental value. This ...
1)Ecological significance生态意义 1.Ecological significance of plant gaseous nutrition and green power;植物气态营养与绿能的生态意义 2.Distribution of abundance on meiobethos and its ecological significance in Xunjiang Bay, Xiamen;厦门浔江湾小型底栖生物数量分布及生态意义 3.Studies on the Paving Environmen...
is a widespread and dominant species of boreal forests. It has an important ecological role as a food source for humans and many... NY Egorova - 《Contemporary Problems of Ecology》 被引量: 0发表: 2020年 The ecological significance of the herbaceous 1\\ ayer in temperate forest ecosystems ...
The process of the forest regeneration is one of hotspots in the study of ecology; seed size has an importantecological significancein the process of the forest regeneration. 就种子大小与个体发育、种群动态和群落组成、结构与动态的相互关系进行综述,着重阐述了不同大小的种子在个体发育过程中的生态学意义...
Analysis was made on current situation of economic forest production and on significance of ecological and economic forest development in China. Descriptions were put forward on economic and ecological effect of major economic tree species like Myrica rubra, Carya cathayensis, Macrocarpium officinalis and...
Chemical indicators of stress in trees: their ecological significance and implication for forestry in Eastern Oregon and Washington 来自 国家科技图书文献中心 喜欢 0 阅读量: 11 作者: RG Kelsey 摘要: Acute and chronic stresses in forest ecosystems can reduce growth or vigour of trees, and cause...
significance of ecological diversity index.The results showed that:(1) In the Maolan,Houzhaihe and Huajiang gorge,the value of landscape diversity index declined with the increase of distance from the settlements.But this number value decreased first,then increased in 1963 and in 2004 with ...
The Ecological Significance of Lobed and Toothed Leaves in Temperature Forest Trees From an extensive literature survey and from analytical data of 130 species from the Sheffield flora, the physiological and molecular attributes, and occur... KF Baker-Brosh,RK Peet - 《Ecology》 被引量: 202发表:...
Aims Ephemerals are important in desert ecosystems,playing a key role in ecosystem stabilization.Previous research has concentrated on spring ephemerals.Little is known about biological and ecological characteristics of ephemerals that germinate in spring and autumn and about the significance of autumn ephem...