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Toward efficient riparian restoration: integrating economic, physical, and biological models

机译：实现有效的河岸恢复：整合经济，物理和生物学模型

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This paper integrates economic, biological, and physical models to explore the efficient combination and spatial allocation of conservation efforts to protect water quality and increase salmonid populations in the Grande Ronde basin, Oregon. We focus on the effects of shade on water temperatures and the subsequent impacts on endangered juvenile salmonid populations. The integrated modeling system consists of a physical model that links riparian conditions and hydrological characteristics to water temperature; a biological model that links water temperature and riparian conditions to salmonid abundance, and an economic model that incorporates both physical and biological models to estimate minimum cost allocations of conservation efforts. Our findings indicate that conservation alternatives such as passive and active riparian restoration, the width of riparian restoration zones, and the types of vegetation used in restoration activities should be selected based on the spatial distribution of riparian characteristics in the basin. The relative effectiveness of passive and active restoration plays an important role in determining the efficient allocations of conservation efforts. The time frame considered in the restoration efforts and the magnitude of desired temperature reductions also affect the efficient combinations of restoration activities. If the objective of conservation efforts is to maximize fish populations, then fishery benefits should be directly targeted. Targeting other criterion such as water temperatures would result in different allocations of conservation efforts, and therefore are not generally efficient. (c) 2005 Elsevier Ltd. All rights reserved.
机译：本文综合了经济，生物和物理模型，以探索保护工作的有效组合和空间分配，以保护俄勒冈州格兰德朗德盆地的水质和增加鲑鱼种群。我们将重点放在阴影对水温的影响以及对濒临灭绝的少年鲑鱼种群的后续影响上。集成的建模系统包括将河岸条件和水文特征与水温联系起来的物理模型；将水温和河岸条件与鲑鱼丰富度联系起来的生物学模型，以及将物理和生物学模型结合在一起以估算保护工作的最低成本分配的经济模型。我们的发现表明，应根据盆地中河岸特征的空间分布选择保护措施，例如被动和主动河岸恢复，河岸恢复区的宽度以及用于恢复活动的植被类型。被动和主动恢复的相对有效性在确定保护工作的有效分配方面起着重要作用。恢复工作中考虑的时间范围和所需温度降低的幅度也会影响恢复活动的有效组合。如果保护工作的目标是最大程度地增加鱼类种群，则应直接针对渔业利益。以其他标准（例如水温）为目标将导致保护工作的分配不同，因此通常效率不高。 （c）2005 Elsevier Ltd.保留所有权利。

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