LTER: The Luquillo Experimental Forest II

小行星9705814 卢基略实验森林（LEF）长期生态学研究计划始于1988年，其目标是将干扰机制和森林结构和动态的研究与景观观点相结合。 两个中心的研究问题解决1）不同的干扰类型的相对重要性的四个热带雨林生命带的LEF和2）的重要性，生物群在恢复生态系统生产力的干扰后。 作为卢基略长期应急反应计划的一部分而启动的长期监测方案，对于评估1989年袭击波多黎各的“雨果”飓风的即时和后续影响至关重要。 LTER计划启动后不久就发生了飓风，这为研究热带森林从重大干扰中恢复的长期动态提供了机会。 整合的空间和时间模式的不同干扰影响的LEF（树福尔斯，山体滑坡，飓风，人类土地利用）表明，即使是大的干扰的影响是不均匀的森林景观。 飓风雨果造成的破坏在LEF中从东北到西南出现强烈梯度，与最强风的方向相对应。 然而，即使是在受到严重干扰的地区，许多森林属性也在风暴后四年内接近飓风前的值。 森林的响应取决于在干扰和干扰的强度时，该网站的演替状态。 在许多地区，即使在雨果飓风之后，过去人类活动的遗产在森林组成和结构中也很明显。 在卢基略LTER进入第二阶段时，1988年开始的长期实验和测量仍将是它的中心重点。 分析飓风及其相关滑坡后的恢复动态，综合多种干扰的相互作用，仍然是合作投资者的主要目标。 新的倡议将集中于界定人为干扰的独特特征，并评价关键物种在形成演替路径方面的重要性。 与以前一样，卢基略LTER的主要重点是为跨站点和网络范围的综合提供信息和想法。

9705814 Waide The Luquillo Experimental Forest (LEF) Long-Term Ecology Research Program began in 1988 with the goal of integrating studies of disturbance regime and forest structure and dynamics with a landscape perspective. Two central research questions addressed 1) the relative importance of different disturbance types within the four tropical rain forest life zones of the LEF and 2) the importance of the biota in restoring ecosystem productivity after disturbance. The long-term monitoring program initiated as part of the Luquillo LTER was critical to the evaluation of immediate and subsequent effects of Hurricane Hugo, which struck Puerto Rico in 1989. The occurrence of a hurricane soon after the initiation of the LTER program provides an opportunity to study the long-term dynamics of a tropical forest as it recovers from a major disturbance. Integration of the spatial and temporal patterns of the different disturbances affecting the LEF (tree falls, landslides, hurricanes, and human land use) indicated that even the effects of large disturbances are not homogeneous over the forest landscape. A strong gradient in damage from Hurricane Hugo occurs from northeast to southwest in the LEF, corresponding to the direction of the strongest winds. However, even in severely disturbed areas, many forest attributes were approaching their pre-hurricane values within four years of the storm. Forest responses depended both on the successional status of the site at the time of disturbance and the intensity of disturbance. In many areas, the legacy of past human activites was apparent in forest composition and structure even after Hurricane Hugo. The long-term experiments and measurements initiated in 1988 will remain the central focus of the Luquillo LTER as it moves into its second phase. Analysis of the dynamics of recovery after the hurricane and its associated landslides and synthesis of the interaction of multiple disturbances continue to be the primary goals of collaborating invest igators. New initiatives will concentrate on defining the distinctive characteristics of anthropogenic disturbance and on evaluating the importance of pivotal species in shaping the path of succession. As before, a major emphasis of the Luquillo LTER will be to provide information and ideas for cross-site and network-wide syntheses..