Journal
WATER RESEARCH
Volume 201, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2021.117253
Keywords
Hydrological connectivity; Habitat suitability; Threshold effect; Ecological indicator; Floodplain
Funding
- National Key Research and Development Program [2019YFC0409002]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDA23040202]
- National Natural Science Foundation of China [41801080]
- Natural Science Foundation of Jiangsu province [BK20181103]
- Open Research Fund of State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University [20R01]
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Developed the Connectivity ASsessment Tool 1.0 (CAST1.0) to assess hydrological connectivity effectively, with a focus on the case of Poyang Lake in China. Found that the response of effective hydrological connectivity to inundation depth, flow velocity, and water temperature shows a dynamic threshold effect, providing insights into potential habitat patches and links.
Continual and accelerating declines in hydrological connectivity threaten ecosystem processes, biodiversity, and services throughout the world. Therefore, there is an increasing demand for user-driven tools that assess hydrological connectivity from an effective perspective. We developed the Connectivity ASsessment Tool 1.0 (CAST1.0), which takes the threshold behaviors of focal ecological indicators into account, allows quantifying effective hydrological connectivity and its regime shift. We illustrate the use of CAST1.0 for the case of Poyang Lake, China. It was found that the response of effective hydrological connectivity to inundation depth, flow velocity, and water temperature follows a dynamic threshold effect. The evaluation of connected objects based on specific niches provides a valuable metric for recognizing potential habitat patches and links. This study provides a sound basis for assessing hydrological connectivity in a meaningful way, promising to provide novel insights into maintaining and restoring biodiversity and associated ecosystem services around the world.
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