Geomorphic heterogeneity as a framework for assessing river corridor processes and characteristics
Geomorphic heterogeneity as a framework for assessing river corridor processes and characteristics
复制标题
地貌异质性作为评估河流廊道过程和特征的框架
DOI：
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发表时间：
2022
期刊：
影响因子：
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通讯作者：
E. Wohl
中科院分区：
文献类型：
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作者：
Daniel N. Scott;Scott M. Shahverdian;Rebecca L. Flitcroft;E. Wohl
空间和时间的异质性，或混乱，是河流走廊的一个广泛可取的特性和许多维持河流生态系统的地貌过程的指标。然而，量化地貌异质性是复杂的缺乏一致的指标，分类模式划分河流走廊的补丁，形成这些指标的基础，并指导解释指标。从地貌和景观生态学的概念，我们提供的想法和指导，旨在帮助调查人员，从研究人员到恢复从业者，更有效，更可靠地使用异质性来描述河流廊道的过程和特点。我们定义地貌异质性的空间和时间。在空间上，异质性可以用多样性或地貌单元的均匀度和丰富度来描述，也可以用空间配置或地貌单元的排列和形状来描述。在时间上，异质性可以用周转率或地貌单元的变化率来描述。异质性度量的解释完全取决于度量所依据的地貌单元模式的定义。上下文信息，例如过程空间的测量（即，河流有多大的移动空间）、扰动频率和地貌轨迹也是解释异质性测量的关键。异质性的地貌应用需要仔细定义的地貌单元模式，反映感兴趣的过程和特征，强大的异质性指标，其含义是适当的问题，并根据预期的地貌过程和干扰制度的背景下，这些指标的解释。
Spatial and temporal heterogeneity, or messiness, is a broadly desirable characteristic of river corridors and an indicator of many of the geomorphic processes that sustain fluvial ecosystems. However, quantifying geomorphic heterogeneity is complicated by a lack of consistent metrics, classification schemas for dividing the river corridor into the patches that form the basis for those metrics, and guidance on interpreting metrics. Drawing from both geomorphic and landscape ecology concepts, we offer ideas and guidance intended to help investigators, from researchers to restoration practitioners, more effectively and reliably use heterogeneity to describe river corridor processes and characteristics. We define geomorphic heterogeneity both spatially and temporally. Spatially, heterogeneity can be described by diversity, or the evenness and richness of geomorphic units, and spatial configuration, or the arrangement and shape of geomorphic units. Temporally, heterogeneity can be described by turnover rate, or the rate of change of geomorphic units. Interpretation of heterogeneity metrics depends integrally on the definition of the geomorphic unit schema on which metrics are based. Contextual information, such as measurements of process space (i.e., how much room a river has to move), disturbance frequency, and geomorphic trajectory, can also be key to interpreting measurements of heterogeneity. Geomorphic applications of heterogeneity require carefully defined geomorphic unit schemas that reflect processes and characteristics of interest, robust metrics of heterogeneity whose meaning is appropriate to the question at hand, and interpretation of those metrics based on the context of expected geomorphic processes and the disturbance regime.
影响因子：
18.3
作者：
Constantine, Jose Antonio;Dunne, Thomas;Lazarus, Eli D.
通讯作者：
Lazarus, Eli D.