Long-Term Ecological Research at the H.J. Andrews Experimental Forest (LTER4)

斯旺森9632921指导HJ Andrews LTER的中心问题是：土地利用、自然干扰和气候变化如何影响三个关键的生态系统属性：碳动力学、生物多样性和水文学？这三种生态系统属性具有很高的科学和社会价值，代表了三种完全不同的生态对景观格局的响应。综合这些研究结果的主要空间尺度是安德鲁斯森林景观(6400公顷)和邻近的蓝河上游流域(9000公顷)。感兴趣的时间范围跨越过去500年，并基于对替代可能的未来条件的模型预测，将几个世纪延伸到未来。LTER研究与更大空间尺度和古生态时间尺度上的工作密切相关。这项研究遵循了一项战略计划，通过继续使用安德鲁斯LTER作为俄勒冈州安德鲁斯实验森林的大型、多方面研究计划的核心来回答这一指导性问题。自1980年成立以来，安德鲁斯森林LTER计划包括一系列研究组成部分的长期实验、测量计划、短期研究和建模分析：气候、水文学、干扰状况/景观动态、植被演替、生物多样性、碳和营养动态以及森林-溪流相互作用。根据这项更新建议，将进行四项相关的综合工作：物种对生态系统功能的影响、演替早期的模式和过程、小流域分析和景观动态分析。这项长期气候变化研究活动的持续开展将促进对太平洋西北森林地貌生态系统结构和功能控制的科学认识。

Swanson 9632921 The central question guiding the HJ Andrews LTER is: How do land use, natural disturbances and climate change affect three key ecosystem properties: carbon dynamics, biodiversity, and hydrology? These three ecosystem properties are of high scientific and social interest and represent three rather different categories of ecological response to landscape patterns. The principle spatial scale for synthesizing results of these studies is the Andrews Forest landscape (6400 ha) and the adjacent upper Blue River watershed (9000 ha). The time scale of interest spans the past 500 yrs and extends several centuries into the future, based on model projections of alternative possible future conditions. LTER studies link closely with work at larger spatial scales and paleoecological time scales. This research follows a strategic plan to answer this guiding question by continuing to use the Andrews LTER as the core of the large, multi-faceted research program based at Andrews Experimental Forest in Oregon. Since its inception in 1980, the Andrews Forest LTER program has consisted of long-term experiments, measurement programs, short-term studies and modeling analyses in a series of research components: climate, hydrology, disturbance regimes/landscape dynamics, vegetation succession, biological diversity, carbon and nutrient dynamics, and forest-stream interactions. Under this renewal proposal, four related synthesis efforts will take place: effects of species on ecosystem functioning, pattern and process during early succession, analysis of small watersheds, and analysis of landscape dynamics. Research under the continuation of this LTER activity will advance scientific understanding of controls on ecosystem structure and function in the forested landscapes of the Pacific Northwest.