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ID:9069130
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页数:8页
时间:2018-04-16
《紫斑牡丹两个异域亚种种群生命表分析》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、园艺学报,2015,42(9):1815–1822.ActaHorticulturaeSinicadoi:10.16420/j.issn.0513-353x.2014-1118;http://www.ahs.ac.cn1815紫斑牡丹两个异域亚种种群生命表分析*张庆雨,张延龙,牛立新,张晓骁,司冰(西北农林科技大学风景园林艺术学院,陕西杨凌712100)摘要:以陕西省子午岭东段铜川市境内的裂叶紫斑牡丹(Paeoniarockiissp.atava)种群和秦岭中段宝鸡市境内的全缘叶紫斑牡丹(Paeoni
2、arockiissp.rockii)种群为调查对象,绘制其静态生命表、种群年龄结构图、存活曲线、死亡率曲线以及生殖力表,进行种群数量动态分析。结果表明:裂叶紫斑牡丹种群在3龄前和9~15龄之间分别经历了环境筛选和竞争自疏,11年为其生理寿命,30年左右为极限寿命,存活曲线表现为Deevey-Ⅰ型,种群表现为增长型。全缘叶紫斑牡丹种群在3龄前经历了强烈的环境筛选,3龄以后种群处于高死亡率状态,9年左右为其生理寿命,24年为极限寿命,存活曲线表现为Deevey-Ⅱ型,种群表现为衰退型。造成两种紫斑牡丹种群
3、数量动态差异的可能原因是繁殖能力的差异、居群规模大小、种群适应性以及人为干扰等。关键词:紫斑牡丹;种群;生命表;存活曲线中图分类号:S685.11文献标志码:A文章编号:0513-353X(2015)09-1815-08LifeTableAnalysisofPopulationBetweenTwoAllopatricSubspeciesofPaeoniarockii*ZHANGQing-yu,ZHANGYan-long,NIULi-xin,ZHANGXiao-xiao,andSIBing(Colleg
4、eofLandscapeArchitectureandArts,NorthwestA&FUniversity,andYangling,Shaanxi712100,China)Abstract:NumericdynamicsofPaeoniarockiissp.atavapopulationinTongchuanofZiwuMountainsandPaeoniarockiissp.rockiipopulationinBaojiofQinlingMountains,werestudiedusingthes
5、taticlifetable,theagestructureofpopulation,thecurvesofsurvivalrate,themortalityrateandthefecundityscheduleofpopulation.ItindicatesthattheP.rockiissp.atavaunderwentenvironmentalscreeningduringitsfirst3yearsandcompetitiveself-thinningattheagebetween9to15y
6、ears,thephysiologicallifespanofthespecieswasabout11years,anditsmaximumlifespanwasabout30years.ThesurvivalrateofP.rockiissp.atavapopulationexhibitsastheDeevey-Ⅰtype,thatpopulationofthespeciesbelongstothetypeofincrease.However,theP.rockiissp.Rockiiunderwe
7、ntverystrongenvironmentalscreeningduringitsfirst3yearsandthedeathrateofpopulationisveryhighafter3years,thephysiologicallifespanofthespecieswasabout9years,anditsmaximumlifespanwasabout24years.ThesurvivalrateofP.rockiissp.RockiipopulationexhibitsastheDeev
8、ey-Ⅱtype,thatpopulationofthespeciesbelongstothetypeofdecline.ThepossiblefactorsleadingtothenumericdynamicsdifferencesoftwoallopatricsubspeciesofPaeoniarockiiareit’sthereproductivecapacity,thepopulationsize,the收稿日期:2015–06–15;修回日期
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