德保苏铁居群特征及保护措施 |
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引用本文: | 马晓燕,简曙光,吴梅,刘念.德保苏铁居群特征及保护措施[J].广西植物,2003,23(2):123-126,142. |
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作者姓名: | 马晓燕 简曙光 吴梅 刘念 |
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作者单位: | 1. 中国科学院华南植物研究所,广东广州,510520 2. 仲恺农业技术学院园艺系,广东广州,510225 |
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基金项目: | 国家自然科学基金资助项目(30070062) |
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摘 要: | 报道了德保苏铁(CycasdebaoensisY.C.ZhongetC.J.Chen)的居群结构调查情况,并与百色地区林业局1998年的调查结果进行比较。结果表明,德保苏铁分布区狭窄,仅产于广西壮族自治区德保县扶平乡约15.3hm2的石灰岩山坡;由于人为原因,其数量已从1998年的2000多株锐减到2001年的1085株,尤其是成年植株数量剧减,由此导致年龄结构趋于幼年化,呈现正金字塔的假象;雌雄比从1∶10变为1∶5,这些现状表明德保苏铁的保护刻不容缓。
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关 键 词: | 德保苏铁 居群结构 变化 保护 |
文章编号: | 1000-3142(2003)02-0123-04 |
The population characters and conservation of Cycas debaoensis Y.C.Zhong et C.J.Chen |
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Abstract: | The population structure of Cycas debaoensis Y. C. Zhong et C. J. Chen was investigated, and compared with the investigation by Forestry Department of Baise City in 1998. It showed that the species has a narrow distribution within 15.3 hm2. area of calcareous stone hill lied in Fuping Xiang, Debao County, Guangxi. With human disturbing, the individuals have decreased from 2 000 in 1998 to 1 085 in 2001, of which those mature ones reduce sharply. The population age structure is inclined to fragile, and the sex ratio of female and male has been changed from 1∶10 to 1∶5. |
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Keywords: | Cycas debaoensis population structure changes conservation |
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