但森林削减坡面径流与侵蚀的效益与森林树种自身的生物、生态学特性及其林分结构状况等密切相关。
However, the reducing benefits of runoff and erosion of forests has a highly correlation with the tree species' biological, ecological property and its stands structural status.
研究和了解骆驼刺的生物生态学特性，是对骆驼刺进行有效保护和合理利用的重要前提。
It is very important to study and grasp the biological and ecological characteristics of Alhagi in order to effectively protect and properly utilize it.
简要介绍了西加云杉的生物生态学特性及其生境条件，并提出了该树种引种的研究方向。
The biological and ecological characteristics as well as habitat condition of Picea sitchensis have been briefed; meanwhile the study direction of its species introduction has been advanced.
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