Gap dynamics in an Ohio Acer–Fagus forest and speculations on the geography of disturbance
Gap dynamics in an Ohio Acer–Fagus forest and speculations on the geography of disturbance
复制标题
俄亥俄州宏碁-水青冈森林的间隙动态和对干扰地理的推测
DOI：
10.1139/x90-085
复制
发表时间：
1990
影响因子：
2.2
通讯作者：
J. R. Runkle
中科院分区：
文献类型：
--
作者：
J. R. Runkle
36个林窗进行了12年的监测，在一个古老的森林占主导地位的Acersaccharum沼泽。和大叶山毛榉（Fagusgrandifolia Ehrh.）大多数的缺口是由单棵树的福尔斯瀑布形成的，尽管一些更大的缺口是由两到四棵树冠树的死亡造成的。林隙闭合率表明，大多数树苗需要发生一个以上的差距，以达到树冠。较新的小尺度扰动，由于其几何形状，以高速率发生在较老的扰动附近。林隙形成后，木本植被密度增加5-10年，然后减少。本研究的四个主要树种表现出不同的响应模式，最佳响应模式如下：槭属所有年龄的小林隙，水青冈属所有大小的老林隙，美洲白蜡属大的幼林隙，鹅掌楸各龄林隙均较大。的存在，大小分布，和物种组成的树苗之前立即形成的差距，帮助确定哪些物种将占主导地位的差距。总的来说，过程…
Thirty-six forest gaps were monitored for 12 years in an old-growth forest dominated by Acersaccharum Marsh. and Fagusgrandifolia Ehrh. Most gaps were formed by single tree falls, although some larger ones were created by the deaths of two to four canopy trees. Gap closure rates suggest that most saplings need the occurrence of more than one gap to reach the canopy. Newer, small-scale disturbances, because of their geometry, occur near older disturbances at high rates. After gaps form, woody vegetation increases in density for 5–10 years and then decreases in density. The four main species of this study show different patterns of response, with optima as follows: small gaps of all ages for Acer, old gaps of all sizes for Fagus, large young gaps for Fraxinusamericana L., and large gaps of all ages for Liriodendrontulipifera L. The presence, size distribution, and species composition of saplings immediately preceding gap formation help determine which species will dominate the gap. In general, the processes...