Identification of Regime Shifts and Their Potential Drivers in the Shallow Eutrophic Lake Yilong, Southwest China
Abstract
:1. Introduction
2. Materials and Methods
2.1. Study Area and Data Acquisition
2.2. Determination of Regime Shift Presence
3. Results and Discussion
3.1. Presence of the Regime Shifts
3.2. Driving Forces for the Regime Shifts
3.3. Nutrient Thresholds for the Regime Shifts and the Hysteresis
4. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Basic Limnological Parameters | Key Events | ||||
---|---|---|---|---|---|
Parameters | Values | Parameters | Values | Year | Events |
Elevation (m a.s.l) | 1414 | TN load (t/(km2·a)) | 12.9 a | 1981 | The lake dried up |
Watershed area (km2) | 360.4 | TP load (t/(km2·a)) | 1.52 a | 1985–1998 | Cage fish (farmed in 1985, removed during 1995–1998) |
Lake area (km2) | 28.4 | SD (m) | 0.48 ± 0.25 b | 2003 | Crab stocking |
Maximum depth (m) | 5.7 | Chl.a (μg/L) | 66.16 ± 49.71 b | 2008–2011 | Fish farming (amount of 30.353 t juvenile fish were put into the lake in Jan. 10th to Feb. 20th, 2009) |
Mean depth (m) | 3.9 | TN (mg/L) | 3.38 ± 1.51 b | 2009–2013 | Drought (the lake almost dried up in 2013) |
WRT (year) | 1.94 | TP (mg/L) | 0.07 ± 0.04 b | 2014 | A rehydration project was implemented to replenish the lake |
Trophic state | eutrophic | TN/TP ratio (by mass) | 48.05 ± 17.16 b | 2016 | Integrated management of the lake watershed was largely started |
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Zhao, L.; Wang, M.; Liang, Z.; Zhou, Q. Identification of Regime Shifts and Their Potential Drivers in the Shallow Eutrophic Lake Yilong, Southwest China. Sustainability 2020, 12, 3704. https://0-doi-org.brum.beds.ac.uk/10.3390/su12093704
Zhao L, Wang M, Liang Z, Zhou Q. Identification of Regime Shifts and Their Potential Drivers in the Shallow Eutrophic Lake Yilong, Southwest China. Sustainability. 2020; 12(9):3704. https://0-doi-org.brum.beds.ac.uk/10.3390/su12093704
Chicago/Turabian StyleZhao, Lei, Mingguo Wang, Zhongyao Liang, and Qichao Zhou. 2020. "Identification of Regime Shifts and Their Potential Drivers in the Shallow Eutrophic Lake Yilong, Southwest China" Sustainability 12, no. 9: 3704. https://0-doi-org.brum.beds.ac.uk/10.3390/su12093704