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Supporting data for "A novel landscape-scale habitat suitability framework reveals mechanisms of dam-induced extinction risk and restoration pathways"
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| Created: | Apr 23, 2026 at 2:51 p.m. (UTC) | |
| Last updated: | Apr 27, 2026 at 3:49 p.m. (UTC) | |
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Abstract
Despite the global degradation of riverine ecosystems due to dams and channelisation, the mechanisms by which habitat degradation disrupts species behavior remain unclear, hindering effective conservation efforts worldwide. Based on long-term monitoring data from 1999 to 2022, this study develops a novel landscape-scale habitat suitability framework that integrates geodetector-weighted hydrodynamic modeling with landscape connectivity metrics to identify key physical drivers and their interactive effects on species’ behavior. Applying to the last spawning grounds of the critically endangered Chinese sturgeon (Acipenser sinensis), the results reveal that hydrodynamic thresholds, particularly turbulence intensity (0.0181-0.0190 ), shear velocity (0.07-1.07 m/s) and water depth (13.47-18.75 m), are primary triggers of spawning magnitude. High turbulence intensity was identified as a critical stressor, preventing successful egg adhesion and increasing metabolic costs for broodstock. Interactions among these factors increased explanatory power from 20.6% to 45% compared to single factor. Moreover, the spatial configuration of suitable habitat patches, including area, fragmentation, and connectivity length, significantly influenced spawning behavior. We demonstrated how landscape-scale habitat suitability drove the shift in spawning locations from downstream to upstream, as well as the drastic decline in spawning magnitude over two decades, leading to the collapse of natural reproduction after 2012. Flow regulation (10,000-15,000 m³/s during thermal windows) and cobble restoration are proposed to rehabilitate spawning grounds for Chinese sturgeon.This work provides a transferable framework for diagnosing habitat degradation in dammed rivers. Beyond sturgeon conservation, the approach offers actionable thresholds for adaptive management of hydrologically altered freshwater ecosystems worldwide.
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readme.txt
# Dataset: A novel landscape-scale habitat suitability framework reveals mechanisms of dam-induced extinction risk and restoration pathways
## 1. Dataset Overview
This dataset contains the biological monitoring and eco-hydraulic simulation data associated with the study of the critically endangered Chinese sturgeon (Acipenser sinensis) spawning grounds downstream of the Gezhouba Dam, Yangtze River. The data supports a novel landscape-scale habitat suitability framework that integrates geodetector-weighted hydrodynamic modeling with landscape connectivity metrics.
## 2. Author Information
Xuan Ban, Hao Du, Pengsheng Li, Ming Zhang, Guangfeng Peng, Xing Wan, Pengcheng Li, Panayiotis Diplas.
## 3. File Descriptions
The dataset consists of five independent Excel (.xlsx) files detailing the historical environmental shifts and modeling outcomes:
* **Figure_2a_Hydrology_Timeseries.xlsx**
* Sheet: Discharge_WaterLevel
* Description: Time series of daily average discharge (m³/s) and water level (m) during the spawning seasons (October-December) spanning the pre- and post-impoundment periods of the Three Gorges Reservoir.
* **Figure_4_Spawning_Magnitude.xlsx**
* Sheet: CPUE_Data
* Description: Long-term biological survey data (1999-2012) recording the Catch Per Unit Effort (CPUE) of spawned eggs and the corresponding classified spawning magnitude grades.
* **Figure_5_EcoHydraulic_Parameters.xlsx**
* Sheets: Drag_Coefficient_Cf, Water_Depth_D, Froude_Number_Fr, Eddy_Viscosity_Eh, Turbulence_Intensity_I, Depth_Averaged_Velocity_V, Shear_Velocity_V_star, Roughness_Reynolds_Re_star.
* Description: Trends and distributions of eight key eco-hydraulic parameters across different spawning magnitudes in the unstressed spawning area (Area 4) from 1999 to 2007.
* **Figure_10a_Discharge_Response.xlsx**
* Sheet: WUAGL_vs_Discharge
* Description: Computed Landscape-integrated Geo-detector Weighted Usable Area (WUAGL) values for the upper (Area A) and lower (Area C) spawning grounds under a range of flow scenarios from 5,000 to 30,000 m³/s.
* **Figure_10b_Bathymetry_Alteration.xlsx**
* Sheet: Topography_Impact
* Description: The sensitivity of WUAGL to various degrees of bathymetry alteration (%) under three distinct discharge conditions (5,000, 10,000, and 15,000 m³/s) in the lower spawning ground.
## 4. Methodological Notes
* **Standardized Headers:** All column headers utilize an explicit snake_case naming convention with units indicated where applicable to facilitate machine readability.
* **Data Verification:** Please note that 'Bathymetry' has been correctly spelled in the headers, amending a minor typographical error present in the original plotting code.
* **Missing Values:** Cells lacking empirical data or computed results are left blank.
## 5. Usage and Citation
If you utilize this dataset for your research or meta-analysis, please cite the corresponding peer-reviewed publication. [Add specific Journal/DOI here once published].
How to Cite
This resource is shared under the Creative Commons Attribution CC BY.
http://creativecommons.org/licenses/by/4.0/
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