[1]姜顺邦,袁丛军,余德会,等.贵州特有植物黔中杜鹃种群结构及其动态分析[J].浙江林业科技,2020,40(04):1-9.[doi:10.3969/j.issn.1001-3776.2020.04.001]
 JIANG Shun-bang,YUAN Cong-jun,YU De-hui,et al.Population Structure and Dynamics of Rhododendron feddei[J].Journal of Zhejiang Forestry Science and Technology,2020,40(04):1-9.[doi:10.3969/j.issn.1001-3776.2020.04.001]
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贵州特有植物黔中杜鹃种群结构及其动态分析()
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《浙江林业科技》[ISSN:1001-3776/CN:33-1112/S]

卷:
40
期数:
2020年04期
页码:
1-9
栏目:
出版日期:
2020-08-20

文章信息/Info

Title:
Population Structure and Dynamics of Rhododendron feddei
文章编号:
1001-3776(2020)04-0001-09
作者:
姜顺邦1袁丛军2余德会3戴晓勇2杨冰2李鹤2龙海燕2
1.贵州省林业学校,贵州贵阳550201;2.贵州省林业科学研究院,贵州贵阳 550005;3.贵州雷公山国家级自然保护区管理局,贵州雷山 557100
Author(s):
JIANG Shun-bang1YUAN Cong-jun2YU De-hui3DAI Xiao-yong2YANG Bing2LI He2LONG Hai-yan2
1.Guizhou Forestry School, Guiyang 550201, China; 2.Guizhou Academy of Forestry, Guiyang 550005, China; 3.LeigongshanNational Nature Reserve Administration of Guizhou, Leishan557100, China
关键词:
黔中杜鹃种群结构静态生命表动态指数生存力分析
Keywords:
Rhododendron feddei population structure static life table dynamic index survival analysis
分类号:
S718.54
DOI:
10.3969/j.issn.1001-3776.2020.04.001
文献标志码:
A
摘要:
为揭示贵州特有植物黔中杜鹃Rhododendron feddei种群结构及其动态特征,选取天然种群集中分布地段,采用相邻格子法设置典型群落样地,分析了黔中杜鹃自然种群的地径结构特征。结果表明:(1)黔中杜鹃种群结构整体呈现出不规则金字塔形;种群的中幼龄个体数充足,占种群总数量的69.23%;严重缺乏幼龄个体数,仅为种群总数量的11.54%;中老龄个体数量总体呈现出下降趋势;存活曲线趋向于Deevey-Ⅱ型。(2)黔中杜鹃种群数量随着龄级结构的增加呈现出先增大后减小的趋势,而种群个体存活数lx随着年龄的增加逐渐减小,个体期望寿命(ex)随着年龄的增加逐渐降低。(3)死亡率(qx)和亏损率(Kx)曲线变化趋势一致,均呈现出先降低后升高再降低最后急剧增长的趋势;生存率和累计死亡率曲线呈互补状态,在Ⅳ径级时种群生存率和累计死亡率持平;死亡密度曲线总体呈现出先缓慢上升后缓慢下降的趋势,而危险率曲线总体表现为先缓慢上升后有一个较小的下降趋势,之后急剧上升再急剧下降,波动性比较大。(4)该种群一旦过了一定的生理年龄,正常更新难以维持,种群就会开始逐渐走向衰退,甚至濒危。
Abstract:
In May 2019, 3 typical sample plots were established by continuous grid quadratesin concentrated distribution area of Rhododendron feddeiin Leigongshan National Nature Reserve of Guizhou province for investigations.The results showed that population structure of Rh.feddeiwas likeirregular pyramid shape, the number of young and middle-aged individuals occupied 69.23% of the total ones, but the number of seedlings hadonly 11.54%,indicatinga downward trend.Survival curve was similar asDeevey-II type.The population number of Rh.feddei increased first and then decreased with the increase of ground diameter, while the individual survival number and individual life expectancy decreased with the increase of ground diameter.The curve of mortality and loss rate showed the same trend, decreased, increased, decreased and increased sharply.The curve of survival rate and cumulative mortality was complementary; the curve of death density showed a slow rise firstand thenslow downward.The danger rate curve hadslowly rising and downward, then rising sharply and declining sharply.Prediction of ground diameter structure ofRh.feddei in the nature reserve resulted that the normal regeneration would bedifficult to maintain.

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备注/Memo

备注/Memo:
收稿日期:2020-01-08;修回日期:2020-05-30
基金项目:贵州省林业科学研究院平台项目“贵州杜鹃花科植物研究”;贵州省天然林保护工程效益监测;贵州雷公山森林生态系统国家定位观测研究站运行补助(编号2019132092)
作者简介:姜顺邦,硕士,助理讲师,从事森林培育、森林生态研究;E-mail:1127103013@qq.com。通信作者:袁丛军,助理研究员,从事恢复生态学、植物分类与保护研究;E-mail:ycongjun2012gzdx@126.com。
更新日期/Last Update: 2020-08-20