环境特征(包括土壤和植被组成)与韩国一个河流岛屿上濒危蜥蜴 Eremias argus 的出没模式的关系

Eunhee Cho, Deokjoo Son
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摘要

Eremias argus,又名蒙古匐行者,是一种爬行动物,尽管被国际自然保护联盟列为 "最不关注 "物种,但自 2005 年以来,韩国一直将其列为二级濒危物种。特定的植被和土壤特性是外温动物 E. argus 栖息地的关键组成部分。然而,目前还缺乏对生活在河流岛屿上的箭鱼环境特征的研究。本研究试图通过将韩国多里逊岛划分为经常出现箭毒的区域(F 区)和很少出现箭毒的区域(R 区),来描述箭毒栖息地的土壤环境因子和植被组成特征。R 区的土壤硬度和卵石覆盖率都明显高于 F 区(土壤硬度:1.6 ± 0.2 kg‧cm-2,平均值 ± 标准误差;卵石覆盖率:40 ± 5%):40 ± 5%)高于 F 区(土壤硬度:0.9 ± 0.1 kg‧cm-2;卵石覆盖率:18 ± 3%)。根据 E. argus 的出现情况,植物枯落物覆盖率没有明显差异。F 区和 R 区的植被组成似乎各不相同,但这两个区都以拟南芥为主。沙丘莎草(Carex pumila)在土壤硬度较低的 F 区生长茂盛,而特有的丹阳翠菊(Aster danyangensis)喜欢在卵石区生长,主要分布在 R 区。总之,E. argus 最常见于以沙丘植被为主的低土壤硬度地区。了解濒危物种对栖息地的要求可为制定保护计划和恢复措施提供重要线索。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Environmental characteristics, including soil and vegetation composition, in relation to the occurrence patterns of an endangered lizard, Eremias argus, in a fluvial island, South Korea
Eremias argus, known as the Mongolian racerunner, is a reptile that has been designated as a level II endangered species in South Korea since 2005 despite being listed as “Least Concern” by the International Union for Conservation of Nature. Particular vegetation and soil characteristics are critical components of the habitat of E. argus, which is an ectotherm. However, research on the environmental characteristics of E. argus living on a fluvial island is lacking. This study sought to characterize the soil environmental factors and vegetation composition of E. argus habitats on Doriseom Island, South Korea by dividing the island into an area in which E. argus occurred frequently (F zone) and an area in which E. argus occurred rarely (R zone). Both soil hardness and cobble cover were significantly higher in the R zone (soil hardness: 1.6 ± 0.2 kg‧cm-2, mean ± standard error; cobble cover: 40 ± 5%) than in the F zone (soil hardness: 0.9 ± 0.1 kg‧cm-2; cobble cover: 18 ± 3%). Plant litter cover did not differ significantly based on E. argus occurrence. The vegetation composition within F and R zones appeared distinct, though Coreopsis lanceolata dominated both zones. A sand dune sedge, Carex pumila, thrived in F zone sites, where soil hardness was low, while the endemic Aster danyangensis, which prefers cobble areas, was found largely in the R zone. In conclusion, E. argus was most commonly found in areas with low soil hardness dominated by dune vegetation. Understanding endangered species’ habitat requirements can provide important clues for establishing conservation plans and restoration measures.
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