A functional flows approach to selecting ecologically relevant flow metrics for environmental flow applications
A functional flows approach to selecting ecologically relevant flow metrics for environmental flow applications
复制标题
为环境流量应用选择生态相关流量指标的功能流方法
DOI：
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
S. Sandoval‐Solis
中科院分区：
文献类型：
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作者：
S. Yarnell;Eric D. Stein;J. Angus Webb;T. Grantham;Rob A. Lusardi;J. Zimmerman;R. Peek;B. Lane;J. Howard;S. Sandoval‐Solis
过去几十年来，环境流的科学和实践取得了显着进步。大多数环境流方法需要量化水文变化和生物响应之间的关系，但由于数据要求高、可转移性有限以及可用于评估的水文指标丰富，确定和实施这可能具有挑战性。我们建议，功能流方法侧重于已知维持重要生态系统过程的自然流态要素，提供了一种将生态系统过程的理解与广泛的本地类群和组合的流态的离散、可量化测量联系起来的途径。功能流量成分可以被识别为支持关键生物物理过程的年度水文过程的不同方面，例如雨季洪水流量或春季衰退流量，然后通过流量指标进行量化，例如分别超过5%的流量或每日流量减少百分比。通过选择一组测量关键功能流量组件的离散流量指标，可以以支持多种生态过程和本地水生物种需求的整体方式管理流量状态的空间和时间复杂性。我们概述了用于选择一组定义的流量指标的功能流方法，并说明了其在两个季节性可变流系统中的应用。我们进一步讨论了如何将功能流方法用作现有环境流框架内外的概念模型，以指导在设计规定的流态时对生态过程的考虑。
The science and practice of environmental flows have advanced significantly over the last several decades. Most environmental flow approaches require quantifying the relationships between hydrologic change and biologic response, but this can be challenging to determine and implement due to high data requirements, limited transferability, and the abundance of hydrologic metrics available for evaluation. We suggest that a functional flows approach, focusing on elements of the natural flow regime known to sustain important ecosystem processes, offers a pathway for linking understanding of ecosystem processes with discrete, quantifiable measures of the flow regime for a broad range of native taxa and assemblages. Functional flow components can be identified as distinct aspects of the annual hydrograph that support key biophysical processes, such as wet season flood flows or spring recession flows, and then quantified by flow metrics, such as 5% exceedance flow or daily percent decrease in flow, respectively. By selecting a discrete set of flow metrics that measure key functional flow components, the spatial and temporal complexity of flow regimes can be managed in a holistic manner supportive of multiple ecological processes and native aquatic species requirements. We provide an overview of the functional flows approach to selecting a defined set of flow metrics and illustrate its application in two seasonally variable stream systems. We further discuss how a functional flows approach can be utilized as a conceptual model both within and outside of existing environmental flow frameworks to guide consideration of ecological processes when designing prescribed flow regimes.
影响因子：
3.7
作者：
Gehara M;Crawford AJ;Orrico VG;Rodríguez A;Lötters S;Fouquet A;Barrientos LS;Brusquetti F;De la Riva I;Ernst R;Urrutia GG;Glaw F;Guayasamin JM;Hölting M;Jansen M;Kok PJ;Kwet A;Lingnau R;Lyra M;Moravec J;Pombal JP Jr;Rojas-Runjaic FJ;Schulze A;Señaris JC;Solé M;Rodrigues MT;Twomey E;Haddad CF;Vences M;Köhler J
通讯作者：
Köhler J