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| 巴音布鲁克天鹅湖高寒湿地景观格局季相变化分析 |
| Seasonal landscape pattern changes in Bayanbulak swan lake alpine wetland |
| 投稿时间：2018-11-07 |
| DOI：10.13254/j.jare.2018.0307 |
| 中文关键词: 湿地景观格局，季相变化，高寒湿地，干旱区 |
| 英文关键词: wetland landscape pattern, seasonal change, alpine wetland, arid area |
| 基金项目:国家自然科学基金项目（31560171，41305136） |
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| 中文摘要: |
| 为探讨湿地年内时间尺度上景观格局变化趋势，以干旱区巴音布鲁克天鹅湖高寒湿地为研究区，利用2015年5—10月OLI遥感影像为数据源，结合气象站点的气温和降水，分析了巴音布鲁克天鹅湖高寒湿地景观格局季相变化特征及其与气候因子的关系。结果表明：年内生长季，湿地面积变化以8月为分水岭，8月前，湿地面积稳定，占研究区面积比例在74.23%~81.15%之间浮动；8月后，湿地面积快速缩减，10月减至最小，占比38.97%。景观水平上，8月前，研究区景观破碎度增大、空间异质性增强、不同类别斑块分布趋于均衡化，8月后，景观破碎度减小、景观异质性减弱、不同类别斑块分布趋于非均衡化；类型水平上，5—10月湿地斑块破碎度增大，形状趋于复杂。湿地面积与月降水量和月均气温均存在显著相关性（r=0.745，P=0.045和r=0.859，P=0.014）。研究表明，月均气温是影响巴音布鲁克天鹅湖高寒湿地景观稳定性的主要因素。巴音布鲁克天鹅湖高寒湿地景观呈“夏季稳定-秋季锐减”的格局。 |
| 英文摘要: |
| In order to explore the changing trends in landscape patterns in wetlands, we analyzed the seasonal landscape pattern change and its relationship with climate factors in the alpine wetland of the Bayanbulak swan lake. From May to October 2015, we used six remote sensing images, including the operational land imager(OLI). Our results showed that the areas of wetland varied slightly, from 74.23% to 81.15% of total area before August. But after August, the wetland area decreased rapidly to 38.97%. At the landscape level, fragmentation and spatial heterogeneity increased from May to August and patch shapes tended to be complex. However, landscape fragmentation and spatial heterogeneity decreased from September to October and the patch shapes tended to be simple. At the class level, the fragmentation of wetland patches increased from May to October and the shape of patches tended to be complex. There were significant correlations between wetland area and monthly precipitation(r=0.745, P=0.045) and monthly mean temperature(r=0.859, P=0.014). In conclusion, monthly average temperature was a major factor in the stability of the alpine wetland landscape pattern in the Bayanbulak swan lake. The landscape pattern varied and the wetland environment tended to be unstable in autumn in the alpine wetlands of Bayanbulak swan lake. The landscape shows a pattern of "summer stability-autumn sharp decline" in the alpine wetlands of Bayanbulak swan lake. |
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