3.Which of the following can be inferred from paragraph 1 about both the upper and lower timberlines? A. Both are treeless zones. B. Both mark forest boundaries. C. Both are surrounded by desert areas. D. Both suffer from a lack of moisture. 你的答案: 正确答案:B 题目解析: 登录 后...
林木线（tree line 或timberline），简称为林线，亦有人称之为“森林界线 (Forest Line/limit)”。指分隔植物因气候、环境等因素而能否生长的界线。在该线以内，植物可如常生长；然而一旦逾越该线，大部分植物均会因风力、水源、土壤或其他气候原因而无法生长。随着纬度，经度，海拔等因素变化，树木渐渐无...
TIMBERLINEFORESTS & forestryVEGETATION dynamicsSPATIAL arrangementGROWING seasonAim: Upper and lower treelines are particularly exposed to a changing climate. It has been hypothesized that upper treelines are constrained by growing season temperature, whereas lower tree lines are water limited. We expect ...
Radiolarian dating of Lower Cretaceous carbonate gravity-flow deposits from Bohinj area (NW Slovenia): significance for reconstruction of a lost carbonate ... Carbonate gravity-flow deposits at Srednja vas near Bohinj have been studied for radiolarian dating and composition of resedimented limestones...
The forests close to the timberline have a lower canopy density and the trees grow to a smaller height. The most important plant communities at the timberline are described. These communities include Picea abies, Abies alba, Larix decidua-Pinus cembra, Larix decidua, Pinus uncinata, Pinus mugo,...
3、At theuppertimberline the trees begin to become twisted and deformed.(在树带界线的上限区域,树木开始弯曲变形。) 4、Not only that, but the red is brighter on theupperside of the leaf.(不仅如此,叶子上部的红色更亮。) 5、His full and very thick moustache covers hisupperlip.(他又浓又厚的...
21. His full and very thick moustache covers hisupperlip. 他又浓又厚的小胡子覆盖了他的上唇。 youdao 22. Not only that, but the red is brighter on theupperside of the leaf. 不仅如此,叶子上部的红色更亮。 youdao 23. At theuppertimberline the trees begin to become twisted and deformed. ...
Temperatures decrease with increasing altitude above timberline, whereas wind velocity increases, especially during winter. Winter snow is deeper and persists longer in the forest than in the krummholz above, its depth in the latter tending to remain constant once the lower portions of the plants ...
The 1,500-m line is a sharp boundary between lower and upper montane rain forest, as it is the lower limit of a frequent and dense cloud cover. The highest peak, Pidurutalagala (2,524 m), is still below timberline. As conifers and Fagaceae are lacking, their ecological role is ...