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以数码照相法估算生物土壤结皮盖度/Coverage Estimation on Biological Soil Crusts Based on Digital Photos[J]
Authors
中国科学院大学,北京100049
中国科学院新疆生态与地理研究所干旱区生物地理与生物资源重点实验室,新疆乌鲁木齐,830011
+3 more
中国科学院新疆生态与地理研究所干旱区生物地理与生物资源重点实验室,新疆乌鲁木齐830011
吴林
张元明
Publication date
1 January 2013
Publisher
Abstract
生物土壤结皮(BSC)是由藻类、地衣、苔藓和土壤中微生物形成的一类有机复合体,是干旱荒漠地区主要的地表覆被类型.由于藻、地衣和苔藓呈非连续性斑块状分布,准确估算它们的盖度比较困难.传统的估算方法主要是样方法和遥感影像法,样方法在野外操作中虽然比较精确但是费时,遥感影像法虽然快速但是误差大.本文试图通过数码照相法获取BSC地表分布信息,然后利用最大似然监督分类法对苔藓结皮、地衣结皮和藻结皮盖度进行分类计算,并用野外原位调查进行验证.结果表明,本文采用的照相法与传统样方法的相关性达到了94.45%,照相法可以有效地用于BSC盖度的估算,提高了盖度估算的效率
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Last time updated on 29/11/2016