以研究区2000 年TM影像、1:50 000 地形图和1:250 000DEM为基础数据源, 运用景观斑块 分布与多样性特征指数, 测算了黔西南中低山丘原盆谷区不同岩性和地貌类型下景观格局特征。结 果表明: ①灌木林地、疏林地、中覆盖度草地占据着景观中的优势地位, 是明显的景观基质, 控制着 区域景观生态格局及其发展。景观斑块类型在不同岩石和地貌类型区存在较明显差异; ②在连续性 灰岩区、灰岩与碎屑岩互层区和灰岩夹碎屑岩区形成的山间盆地和高原台面上以及北部水热丰富 的河谷地带, 水田、旱地、疏林地、低覆盖度草地集中分布, 浅中切割低山类型中有林地和灌木林地 集中分布; ③在连续性白云岩区形成的深切割( 低、中和高) 丘陵、浅切割( 低、中和高) 丘陵, 低覆盖 度草地和灌木林地集中分布; ④从岩溶石漠化、土壤侵蚀、森林退化的空间格局及其组合来看, 在形 成生态环境的区域差异过程中, 岩性和地貌的空间组合结构起着显著的控制作用。
Abiotic environmental spatial variations and various disturbances were main divers, which resulted in landscape heterogeneity.Spatial patterns of landscape elements were dominantly enslaved to landform characteristics and disturbances.The objective of this study was to use Landsat TM data at a spatial resolution of 30m, 1:50 000 topographic map and 1:250 000 DEM in 2000 to determine the distribution of landscape patches and the relations among the distribution of landscape patches, lithologic types and landform types basing on patch distribution and diversity index across middle-low mountains, hills, basins and valleys from southwestern Guizhou province, China.The results indicated that in the study site, shrubbery land, sparse-forest land and moderate coverage grassland were dominant landscape types.They were obvious landscape matrixes, and controlled landscape patterns and their evolvements.Moreover, there was an evident difference of landscape patches in different lithology-landform areas.Paddy, dryland, sparse-forest land and sparsely covered grasslands are distributed primarily in intermontane basins and plateau surface of homogenous limestone, limestone /clastic rock alternations and limestone interbedded with clastic rock areas, and river valley zone, which are rich in water and heat and are located at north of the study area.Forestland and shrubbery land occurred mainly in shallow and moderate dissected low mountains.Sparsely covered grassland and shrubbery land were detected mainly on low, middle and high hills, which are dissected deeply or shallowly in homogenous dolomite areas.Seen from spatial patterns and assemblages of karst rock desertification, soil erosion and forest degradation, lithology and landform played pronounced roles in controlling the processes of eco-environmental heterogeneity.
[1] Abdullah S A,Nakagoshi N.Changes in landscape spatial pattern in the highly developing state of Selangor,peninsular Malaysia[J].Landscape and Urban Planning,2006,77(3):263- 275.
[2] Baessler C,Klotz S.Effects of changes in agricultural land-use on landscape structure and arable weed vegetation over thelast 50 years[J].Agric. Ecosyst. Environ.,2006,115(1- 4):43- 50.
[3] 李阳兵,白晓永,周国富,等.中国典型石漠化地区土地利用与石漠化的关系[J].地理学报,2006,61(6):624～632.[LI Yangbing,BAI Xiao-yong,ZHOU Guo-fu,et al.The relationship of land use with karst rocky desertification in a typical karst area,China.Acta Geographica Sinica,2006,61(6):624- 632.]
[4] Michael J D,Chenoweth M S.The karstlands of Trinidid and Tobago,their land use and conservation[J].The GeographicalJournal,2004,170(3):256- 266.
[5] 张惠远,蔡运龙,万军.基于TM影像的喀斯特山地景观变化研究[J].山地学报,2000,18(1):18～25.[ZHANG Hui-yuan,CAIYun-long,WAN Jun.The study on the landscape change in karst mountain area using TM image.Journal of MountainResearch,2000,18(1):18- 25.]
[6] 李阳兵,王世杰,容丽.不同石漠化程度岩溶峰丛洼地系统景观格局的比较[J].地理研究,2005,24(3):271～278.[LI Yangbing,WANG Shi-jie,RONG Li.A comparative researches on landscape pattern changes in different rock desertification peakcluster-depressions.Geographical Research,2005,24(3):271- 278.]
[7] 郭晋平,王俊田,李世光.关帝山林区景观要素沿环境梯度分布趋势的研究[J].植物生态学报,2000,24(2):135～140.[GUOJin-ping,WANG Jun-tian,LI Shi-guang.Distribution of landscape elements along environmental gradients in Guandishanforest region.Acta Phytoecologica Sinica,2000,24(2):135- 140.]
[8] Wang S J,Li R L,Sun C X,et al.How types of carbonate rock assemblages constrain the distribution of karst rocky desertifiedland in Guizhou Province,P R China:Phenomena and mechanisms[J].Land Degrad. Develop.,2004,(15):123- 131.
[9] 周国富.贵州喀斯特石漠化分布的空间差异与防治区划探讨[J].中国岩溶,2006,25(1):79～84.[ZHOU Guo-fu.Discussionon the spatial diversity and preventive region division of karst rocky desertification area in Guizhou.Carsologica Sinica,2006,25(1):79- 84.]
[10] 肖笃宁,李秀珍.景观生态学的学科前沿与发展战略[J].生态学报,2003,23(8):1615～1621.[XIAO Du～ning,LI Xiu-zhen.Forefronts and future strategies of landscape ecology.Acta Ecologica Sinica,2003,23(8):1615- 1621.]
[11] 焦树林,梁虹.喀斯特地区流域地貌与岩性的统计关系探讨———以贵州省为例[J].中国岩溶,2002,21(2):95～100.[JIAOShu-lin,LIANG Hong.The research on the relationship between drainage basins’ landforms and its lithologic features inkarst region:a case study in Guizhou province.Carsologica Sinica,2002,21(2):95- 100.]
[12] 李阳兵,王世杰,李瑞玲.不同地质背景下岩溶生态系统的自然特征差异———以茂兰和花江为例[J].地球与环境,2004,32(1):9～14.[LI Yang-bing,WANG Shi-jie,LI Rui-ling.Differences in natural characteristics for karst ecosystems under differentgeological backgrounds as exemplified by Maolan and Huajiang ecosystems.Geology-geochemistry,2004,32(1):9- 14.]
[13] 沈泽昊.山地森林样带植被- 环境关系的多尺度研究[J].生态学报,2002,22(4):461～470.[SHEN Ze-hao.A multi-scalestudy on the vegetation-environment relationship of a mountain forest transect.Acta Ecologica Sinica,2002,22(4): 461- 470.]
