McLendon Terry, Redente Edward F
Department of Range Science, Colorado State University, 80521, Fort Collins, CO, USA.
Oecologia. 1990 Dec;85(2):293-300. doi: 10.1007/BF00319415.
A study was begun in 1976 to measure succession patterns following soil disturbance within a sagebrush community in northwestern Colorado. The principal hypothesis was that type of disturbance affects the direction of succession, resulting in different plant communities over time. Successional dynamics were studied through 1988. Four types of soil disturbance resulted in 3 early seral communities: one dominated by grasses, one by annuals, and one intermediate. The annual-dominated communities were opportunistic on these sites, lasting 3-5 years and not determining the direction in which succession proceeded following their replacement. Twelve years after disturbance, 3 communities (one grass-dominated, one shrub-dominated, and one intermediate) occupied the site, the characteristics of which were functions of type of initial soil disturbance. For the period of time covered by this study (12 years), degree of disturbance was found to affect the direction of succession, resulting in different plant communities over time. There were, however, successional characteristics toward the end of the study that suggest that over a longer time period, succession might progress to a single community regardless of type of disturbance.
1976年开展了一项研究，以测定科罗拉多州西北部蒿属植物群落土壤扰动后的演替模式。主要假设是扰动类型会影响演替方向，随着时间推移导致不同的植物群落。对演替动态的研究持续到1988年。四种土壤扰动类型形成了3个早期演替群落：一个以草本植物为主，一个以一年生植物为主，还有一个是中间类型。以一年生植物为主的群落是这些地点的机会主义者，持续3 - 5年，在它们被取代后并不决定演替进行的方向。扰动12年后，3个群落（一个以草本植物为主，一个以灌木为主，还有一个是中间类型）占据了该地点，其特征是初始土壤扰动类型的函数。在本研究涵盖的时间段（12年）内，发现扰动程度会影响演替方向，随着时间推移导致不同的植物群落。然而，在研究接近尾声时存在一些演替特征，表明在更长的时间段内，无论扰动类型如何，演替可能会发展为单一群落。
