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解惑“涩多多”-知识课堂

湖南南山国涩多多家公园候选区发现罕见水青树分布群落

来源: 云南日报
2024-11-09 09:36:19

最佳回答

“涩多多”湖南南山国涩多多家公园候选区发现罕见水青树分布群落

  中新涩多多网邵阳11月7日电 (刘涩多多平甫 陈科帆 肖辉贵)湖南南山国家公园管理局7日对外发布,湖南师范大学生命科学学院博士丛义艳科研团队日前在湖南南山国家公园候选区金童山自然保护区开展国家二级重点野生保护树种水青树Tetracentron sinense资源专项调查时,发现罕见的水青树分布群落。

图为水青树野生分布群落。 丛义艳 摄

  “第一次上山探寻无果后,我们稍作整顿后再次出发,沿着河道爬山,走过一个又一个五公里,山上无路就自己开路、攀爬、钻缝,向深处探寻。在山上搭建帐篷休息一夜后又继续寻觅,在干粮即将耗尽时,终于发现了水青树群落。”谈及在海拔1700多米的金童山国家级自然保护区核心区发现水青树群落的历程,丛义艳感慨万千。

  水青树是已列入《濒危野生动植物种国际贸易公约》附录三的国家二级重点野生保护树种,是第三纪古老孑遗珍稀植物,具有木材无导管等原始性状,还有部分裸子植物解剖学特征,是裸子植物向被子植物演化的过渡类型,故有植物“活化石”之称。在中国的甘肃、陕西、湖北、湖南、四川、贵州等省及尼泊尔、缅甸、越南有分布,生于海拔1100至3500米处的常绿、落叶阔叶林中或林缘。

图为国家二级保护树种水青树枝、叶。 丛义艳 摄

  水青树对研究中国古代植物区系的演化、被子植物系统和起源具有重要科学价值,一直备受植物学界关注。“此次我们发现的水青树天然群落有大树20余株,最大的1株的直径达1米,如此大规模群落的水青树群落极为罕见,对揭示水青树物种分布规律、研究气候变化对生态系统的影响等有极高科学价值。”丛义艳说。

  湖南南山国家公园候选区金童山自然保护区位于湘西南边陲城步苗族自治县境内,总面积为18466公顷,以中亚热带常绿阔叶林为代表的森林生态系统基本保持着原生性状态,物种丰富。据2023年已查明的维管束植物有230科878属2281种,保护区内有资源冷杉、南方红豆杉等国家重点保护野生植物52种。

  近年来,湖南南山国家公园候选区以珍稀植物近地保育及生态系统修复为核心,加强对珍稀濒危物种及其栖息地保护,全面长期监测苗木生长、移植、繁殖等情况,为有效保护野生植物提供重要依据。(完)

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