The Landscape Continuum: A Model for High-Elevation Ecosystems
The Landscape Continuum: A Model for High-Elevation Ecosystems
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景观连续体：高海拔生态系统模型
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
M. Williams
中科院分区：
文献类型：
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作者：
T. Seastedt;W. Bowman;T. N. Caine;D. McKnight;A. Townsend;M. Williams
摘要复杂地形梯度的气候和生态系统之间的相互作用产生了独特的水和养分的源和汇生境，作为降水，能量和化学物质再分配的结果。我们在科罗拉多前山脉的高海拔地区研究了这些现象。目前气候的变化和大气中氮沉积到这些系统中，导致该系统的某些部分发生快速变化，但其他部分则没有。使用一个概念模型，陆地生态系统相互联系和水生生态系统，我们报告如何大气输入和内源性资源可以放大或衰减的运输过程。预计高海拔湖泊和高山苔原-森林交错带将受到来自以下方面的人为投入的冲击：（a）来自区域环境的外源物质的重新分配;（B）来自其他山区的内源。
Abstract Interactions between climate and ecosystems with complex topographic gradients generate unique source and sink habitats for water and nutrients as a result of precipitation, energy, and chemical redistribution. We examined these phenomena for a high-elevation site in the Colorado Front Range. Current changes in climate and atmospheric deposition of nitrogen to these systems are causing rapid changes in some portions of this system but not in others. Using a conceptual model that links terrestrial ecosystems to each other and to aquatic ecosystems, we report how atmospheric inputs and endogenous resources can be amplified or attenuated by transport processes. High-elevation lakes and the alpine tundra–forest ecotone are expected to receive the brunt of anthropogenic inputs obtained from (a) the redistribution of exogenous materials from the regional environment and (b) endogenous sources originating in other montane areas.