一些外来树种发生了树冠干枯和植株枯死。
外来树种，如松树和桉树，并不能为环境带来这一好处。
Exotic trees, like pine and eucalyptus, cannot offer these environmental benefits.
这些重要林业害虫在我国的发生都是伴随着敏感外来树种的引进和大量不合理的种植而逐渐严重起来的。
The outbreaks of these indigenous species occurred in conjunction with the introduction of sensitive exotic tree species species and ill-advised expansion over large areas.
为应对暴涨的丧葬费用，南非“致力于保护水资源”项目制定了一个解决方案-用外来入侵树种制造棺材。
South Africa's Working for Water program has come up with a solution to the spiraling funeral costs - use wood from invasive trees to produce coffins.
栽种使用的单一树种可以是本地的或是外来的，不过这些种植园都是集约化管理的。
The single species used for plantations may be indigenous or exotic, but these plantations are intensively managed.
Cozett说，外来入侵树种和植物给南非带来了诸多问题，其中最大的问题是对南非水资源安全的威胁。
Cozett says invasive alien trees and plants pose a number of problems in South Africa, not the least of which is the impact on the country's water security.
英国最为人所只的海鸟海雀，由于全球暖化，而被快速生长的外来入侵树种所消灭。
One of britain ' s best - known seabirds, the puffin, is being wiped out by invading fast - growing alien plant species because of global warming.
英国最为人所只的海鸟海雀，由于全球暖化，而被快速生长的外来入侵树种所消灭。
One of britain ' s best - known seabirds, the puffin, is being wiped out by invading fast - growing alien plant species because of global warming.
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