Study on the Changes of Dry and Wet Characteristics in Zhalong Wetland Based on SPI and Its Impact on Wetland Landscape Fragmentation
Liu Xingli
Guan Ningxin
Ji Zhihua
Liu Changcheng
Abstract：Based on the monthly precipitation data from the observation stations near the Zhalong wetland,the climate change features of dry and wet conditions of Zhalong wetland is investigated by the wavelet analysis method according to the standard precipitation index(SPI).The results show that there exist inter-annual(4-8 years)and inter-decadal(around 24 years)variations in the drought and wet-ness of Zhalong wetland.From 1903 to 2020,the drought and wetness degrees of Zhalong Wetland fluc-tuated significantly with time,with a tendency towards dryness from the early 1900s to the 1920s and also in the 1970s,and a tendency towards wetness from the 1930s to the 1960s and then from the 1980s to the 2010s.In terms of spatial distribution,Zhalong wetland is characterized by a wetness trend except its southeast part.Therefore,Zhalong wetland shows a tendency of wetness as a whole.Further analysis in-dicates that the frequency of extreme drought will increase under the background of global warming.Mo-reover,a short term of continuous extreme drought condition can bring a tremendous influence to the Zha-long wetland ecosystem.As a result,the drought tendency of the wetland may lead to the reduction in biodiversity and the shrinkage of the wetland acreage,finally intensifying the landscape fragmentation process of the Zhalong wetland.
Keywords：standardized precipitation indexdry and wet characteristicslandscape fragmentation
Publication Date：2025-01-30
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：5( 73-77 )