Table 2
Linear regressions between each variable over the study period.
| Lake | Variable | Slope | p | N | Year range |
|---|---|---|---|---|---|
| Fuxian | Chl. a* | 0.111 | <0.01 | 20* | 1990–2010 |
| AT* | – | >0.05 | 20* | 1990–2010 | |
| SD* | – | >0.05 | 20* | 1990–2010 | |
| TN* | – | >0.05 | 20* | 1990–2010 | |
| TP | −0.0004 | <0.01 | 21 | 1990–2010 | |
| Erhai | Chl. a* | 0.662 | <0.05 | 20* | 1990–2010 |
| AT* | 0.075 | <0.01 | 20* | 1990–2010 | |
| SD | −0.115 | <0.01 | 20 | 1991–2010 | |
| TN* | 0.017 | <0.01 | 20* | 1990–2010 | |
| TP* | – | >0.05 | 20* | 1990–2010 | |
| Dianchi | Chl. a* | 3.07 | <0.05 | 20* | 1991–2010 |
| AT | 0.071 | <0.01 | 21 | 1990–2010 | |
| SD | – | >0.05 | 21 | 1990–2010 | |
| TN | 0.434 | <0.01 | 21 | 1990–2010 | |
| TP* | – | >0.05 | 20* | 1990–2010 | |
Chl. a, annual mean chlorophyll a concentration; AT, annual mean air temperature; SD, annual mean water transparency; TN, annual mean total nitrogen; and TP, annual mean total phosphorus. “*” indicates that there was an temporal autocorrelation in the ordinary regression, as demonstrated using modified linear models by autoregression (AR-1).
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