浙江古田山亚热带常绿阔叶林开花和结实物候的种间种内差异  

Intra-and Inter-Specific variation on flowering and fruiting phenology in gutianshan subtropical evergreen broad-leaved forest,Zhejiang province

作　　者：赵袁 杜彦君[3] 曹洪麟[1] 胡小丽[4] 马克平[3] ZHAO Yuan DU YanJun CAO HongLin HU XiaoLi MA KePing(South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China University of Chinese Academy of Sciences, Beijing 100039, China State key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beo＇ing 100093, China 4College of life sciences, Northwest Agriculture ＆ forestry university, Yangling 712100, China)

机构地区：[1]中国科学院华南植物园,广州510650 [2]中国科学院大学,北京100039 [3]中国科学院植物研究所,植被与环境变化国家重点实验室,北京100093 [4]西北农林科技大学生命科学学院,杨凌712100

出　　处：《中国科学：生命科学》2016年第11期1312-1323,共12页Scientia Sinica(Vitae)

基　　金：科技部国家标本资源平台项目(批准号:Y5217G1001,2005DKA21400);中国森林生物多样性监测网络建设项目资助

摘　　要：植物物候学主要研究植物的生活史事件发生时间和环境因子之间的关系.物候作为植物重要的功能性状,却未见有在群落水平上将植物物候变异和群落结构特征(多度)联系起来探究植物物候变异规律的报道.为了探索物候性状的种间种内变异规律,2012年4月~2015年8月在中国东部地区浙江省古田山国家级自然保护区亚热带常绿阔叶林24hm^2大样地(GTS;29°10′19.4″~29°17′41.4″N,118°03′49.7″~118°11′12.2″E)内,对106种植物的物候进行连续观测,用标准差定性分析物候的种间和种内差异.结果表明,影响开花物候的气候因子为降水,群落开花高峰集中在5月,结实成熟高峰集中在10月.群落结实物候种间差异小于开花物候,其中结实物候种间差异为41天,开花物候种间差异为52天;群落水平植物开花和结实物候的种内变异小于种间;大部分物种开花物候的种内变异小于结实物候.本研究首次探讨了物候期种内变异系数和物种多度的关系,也是首次研究物候种内变异系数与物候期早晚的关系,发现群落物候种内变异与物种的多度不相关,群落开花物候种内变异与物候期的关系不显著,群落结实物候的种内变异和物候期具有显著负相关关系,即物候期早的结实物候种内变异大,物候期晚的结实物候种内变异小.将植物物候变异和群落结构特征(多度)联系起来探究植物物候变异规律,有利于理解物候的改变是怎样影响物种的相互作用和适合度,这对于在气候变化大背景下理解植物性状变异及物种分化和群落动态变化具有重要意义.Phenology,the timing of recurrent life-history events,including bud bust,leaf out,flowering,fruiting,and leaf senescence,are related to environmental conditions and species interactions.As one of the most important plant functional traits,the qualitative correlation between inter-and intm-specific phenology variation and community structure has not been investigated at the community level.We monitored both flowering and fruiting phenology for106 species during 2012 to 2015 in a Gutianshan 24 ha permanent plot in a subtropical evergreen broad-leaved forest in Zhejiang province.We used standard deviation to evaluate inter-and intra-specific phenology variation.Results showed that precipitation was the major climatic factor influencing flowering phenology;most species flowered in May at the community level;fruiting phenology reached its peaks on October.Interspecific variation of flowering phenology was larger than that of fruiting phenology.The standard deviation of the interspecific variation of flowering phenology was52,and of interspecific variation of fruiting phenology was 41.However,intraspecific variation on flowering phenology was smaller than fruiting.At the community level,intraspecific variation on flowering and fruiting phenology was smaller than intraspecific variations.Intraspecific variation on phenology at the community level was not significantly correlated with species abundance.Intraspecific variation of flowering phenology did not have a significant relationship with flowering date.However,intraspecific variation of fruiting phenology had a significant negative relationship with fruiting date.Intraspecific variation of fruiting phenology decreased as fruiting date increased.To our knowledge,this is the first study to explore the relationship between intraspecific phenology variation and phenology date and the first to evaluate the relationship between intraspecific phenology variation and species richness.Coupling these quantitative phenological data with community structure（abundance）will e

关 键 词：开花 结实 种间性状变异 种内性状变异 群落结构 

分 类 号：Q948[生物学—植物学]