2000-2010年福建省植被覆盖度的时空演变特征

运用趋势分析法及Mann-Kendall趋势检验法对福建省2000-2010年植被覆盖度进行了分析,探究福建省植被覆盖度的时空演变过程.结果表明:(1)福建省植被覆盖度以每年0.003 15的速率增加,但在2005年存在一个明显的波动下降,植被在7月,8月,9月份盖度最大.(2)根据我国植被覆盖度分类标准,福建省以高植被覆盖度为主,2000-2010年低、中植被覆盖度向高植被覆盖度转化15.84％.(3)各市区植被覆盖度变化显著,其中莆田市、宁德市、漳州市变化最为明显.通过各区域的趋势百分比可知,福建省各市区植被覆盖度以增加为主,各市区植被覆盖度增加百分比为:宁德市＞漳州市＞福州市＞泉州市=莆田市=厦门市＞龙岩市＞南平市＞三明市.(4)不同植被类型区植被盖度在年际变化尺度呈现稳步增加的趋势,各植被类型盖度均值介于0.596～0.799,此外植被覆盖度的增加量顺序依次为:湿地＞草地＞农作物＞非植被＞阔叶林=针叶林.

Spatiotemporal Variations of Vegetation Change in Fujian Province from 2000 to 2010

The trend analysis method and Mann-Kendall trend test were applied to analyze the dynamic change of vegetation coverage in Fujian Province from 2000 to 2010 in oder to explore the spatiotemporal variations of vegetation cover in Fujian Province.The results showed that:(1) vegetation coverage of Fujian increased by the rate of 0.003 15 per year,but there was an obvious fluctuation in 2005;the maximum increase in the vegetation coverage was in July,August and September;(2) according to vegetation cover type classification,Fujian was mainly covered by high vegetation coverage,in total,about 15.84％ of low,medium vegetation cover was converted to high vegetation cover during 2000 to 2010;(3) a significant increase in vegetation coverage in the urban areas like Putian,Ningde,Zhangzhou had changed drastically with the loss of vegetation coverage;regional trends showed that the percentage of each urban vegetation coverage in Fujian,was mainly decrease in the order:Ningde＞Zhangzhou＞Fuzhou＞Quanzhou=Putian=Xiamen＞Longyan＞Nanping＞Sanming;(4) different types of vegetation coverage in inter-annual variability scale had shown a steady upward trend,various types of vegetation cover average were between 0.596 and 0.799;in addition,the vegetation coverage decreased in the order:wetlands＞ grassland＞ crop＞ non-vegetation＞ broadleaf forest=needle leaved forest.