《Wetland》杂志刊登“20多年间日益增加的城市化景观中孤立湿地的损失和退化研究”

作者：Lisa A.McCauley,David G.Jenkins,Pedro,F.Quintana-Ascencio

刊物：《Wetland》,2013年2月

关键词：柏树圆顶；福罗里达；破碎化；生境丧失；美国东南部；城镇化

摘要：城市化是美国物种损失的主要因素，这是由栖息地破坏和破碎化造成的。湿地易受城市化影响，湿地状况可与土地利用类型相比较。Cypress domes是一种孤立的由柏树占主导地位的湿地，往往存在于城镇地区。本研究的目的是量化美国东南部城市佛罗里达州奥兰多市在20多年间快速城市化对于Cypress domes这种湿地的数量、尺寸和空间格局的影响。1984年的影像表明，在典型的城市化前有3000多个湿地。在20年间，26%的湿地遭到破坏或者退化(即柏树不再占主导地位)，近半数的经营林退化、遭到破坏，或被城市包围或变为农业土地利用。最小和最大的这类湿地（Cypress domes）消失了，只留下了中型湿地和越来越少的景观水平多样性。尽管这些湿地是常见的并且部分受到法律保护，但是生长于孤立湿地的柏树可能面临着城市化的威胁。

Isolated Wetland Loss and Degradation Over Two Decades in an Increasingly Urbanized Landscape

Authors: Lisa A.McCauley,David G.Jenkins,Pedro,F.Quintana-Ascencio

Journal:Wetland,2013

Key words:Cypress dome;Florida;Fragmentation;Habitat loss;Southeastern US;Urbanization

Abstract: Urbanization is a leading cause of species loss in the United States because of habitat destruction and fragmentation. Wetlands can be affected by urbanization and the condition of wetlands can be compared across land use categories. Cypress domes are isolated wetlands dominated by cypress (Taxodium distichum) and often remain in urban areas. The purpose of this study was to quantify the effects of urbanization on cypress dome number, size and spatial pattern through two decades of rapid urbanization in Orlando, Florida, a large city in the southeastern US. Over 3,000 cypress domes, in a region typical of urban growth in the cypress range, were identified in images from 1984. Over a 20-year period, 26 % were destroyed or degraded (i.e., no longer cypress-dominated) and almost half in managed forests were degraded, destroyed, or became surrounded by urban or agricultural land uses. The smallest and largest cypress domes were lost, leaving only medium-sized wetlands and decreasing landscape-level diversity. Despite the fact that these wetlands are common and partially protected by legislation, cypress in isolated wetlands may be at risk from urbanization.

原文链接：http://link.springer.com/article/10.1007/s13157-012-0357-x