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The Leizhou Peninsula exhibits one of the highest incidences of drought within the Pearl River Basin. Research on the characteristics and response mechanisms of meteorological and hydrological droughts in this area holds significant theoretical and practical importance for understanding drought patterns in regions with abundant rainfall yet fragile water resource systems. Based on the monthly meteorological and hydrological data from the representative station in Leizhou Peninsula, the standardized precipitation-evapotranspiration index (ISPEI) and standard runoff index (ISRI) were used to analyze the variation patterns of meteorological drought and hydrological drought in this region from 1970 to 2016. The Mann-Kendall trend test method, moving average method and Morlet wavelet analysis method were adopted to analyze the changing trends and cycles of meteorological drought and hydrological drought in this region at different time scales (3 and 12 months). Propagation characteristics of meteorological drought to hydrological drought were examined using the run-length theory. The results show that the meteorological drought in Leizhou Peninsula is increasing during the study period. Particularly, the 12-month ISPEI obtained from Zhanjiang station and Xuwen station decreased significantly, at the rate of -0.014/month and -0.008/month, respectively. However, no obvious trend of hydrological drought was detected. Both drought types showed multi-scale periodicity, sharing a primary first-order period of 20 years in the north and 14 years in the south. The main cycles of meteorological drought and hydrological drought in the south and north are consistent, and the variation patterns are relatively synchronous. Hydrological drought in the southern peninsula demonstrated stronger responsiveness to meteorological drought than the northern region.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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