福雷斯特差距,在华盖的开始由至少一棵树的死亡引起了,在森林新生和开车上有深刻效果森林生长周期。为现代森林管理在新生上理解森林差距的效果因此是必要的。为了提供对森林的效果的一个量的评价,在木质的植物的新生上豁开,我们从 42 份单个报纸根据 527 观察在木质的植物新生上进行了差距效果的这评论,并且在元分析报导了这些数据的结果。总的来说,改革木质的植物的密度显著地更大(359%) 比在靠近华盖的森林地板上在森林里豁开。在种植园森林的差距的新生密度显著地更大(P < 0.05 ) 因为在种植园森林的差距的新生被两个改进,比自然森林的,差距完成并且试验性的措施。与自然差距相比,同样,新生更好在人工的差距被提高。因为差距尺寸与增加差距年龄减少了,新生密度与差距尺寸,而是与差距年龄的否定关联展出了显著地积极的关联。木质的植物的阴影忍耐在差距和 understory 影响了新生密度。阴影容忍的种类的平均新生密度展出了显著地积极的回答到差距,但是密度中间、阴影偏狭的种类比那些总共仍然保持更低。新生上的差距效果响应因为更低的温度和潮湿的限制效果,在木质的植物新生上增加温度和降水减少了。在摘要,森林差距提高木质的植物新生,并且由森林改变的差距的效果打差距特征,环境因素和植物特点。这元分析的结果为更好在森林新生和森林管理上理解差距的效果和角色是有用的。
Forest gaps, openings in the canopy caused by death of one or more trees, have a profound effect on forest regeneration and drive the forest growth cycle. It is therefore necessary to understand the effects of forest gaps on regeneration for modern forest management. In order to provide a quantitative assessment of the effects of forest gaps on regen-eration of woody plants, we conducted this review of gap effects on woody plant regeneration on the basis of 527 observations from 42 indi-vidual papers, and reported the results of these data in a meta-analysis. Overall, densities of regenerated woody plants were significantly greater (359%) in forest gaps than on the closed-canopy forest floor. The regen-eration density in gaps of plantation forests was significantly greater (P&lt;0.05) than that of natural forest because the regeneration in gaps of plan-tation forests was improved by both gap effects and experimental meas-ures. Similarly, in comparison to natural gaps, regeneration was better enhanced in artificial gaps. Regeneration density exhibited a significantly positive correlation with gap size, but a negative correlation with gap age because the gap size decreased with increasing gap age. Shade tolerance of woody plants affected regeneration density in gaps and understory. Average regeneration density of shade-tolerant species exhibited a sig-nificantly positive response to gaps but densities remained lower in total than those of intermediate and shade-intolerant species. Gap effects on regeneration decreased in response to increasing temperature and pre-cipitation because of the limiting effects of lower temperature and moisture on woody plant regeneration. In summary, forest gaps enhance woody plant regeneration, and the effects of gaps varied by forest type, gap characteristics, environmental factors and plant traits. The results of this meta-analysis are useful for better understanding the effects and roles of gaps on forest regeneration and forest management.