The Study On Growth Strategies Of Climbing Plants In Taibai Mountain,Qinling Mountains

Climbing plants are an important part of tropical,subtropical and temperate forest communities,which have important effects on forest structure,function and dynamics.In recent years,ecologists have carried out a large number of studies on the growth strategies of climbing plants,but they mainly focus on the tropical and subtropical regions,while less attention is paid to climbing plants in the temperate zone.Moreover,existing studies have grouped climbing plants into one group,and there is a lack of taxonomic studies on climbing plants.Therefore,this study took the main climbing plants in the warm temperate forest of Taibai Mountain of Qinling Mountains as the research object,based on the investigation and study of functional traits and biomass allocation pattern,the contrast analysis of the four climbing patterns of vines(stems twining,petioles twining,tendrils and sprawling class)and three climbing patterns of lianas(stems twining,tendrils and sprawling class)in the functional traits and biomass allocation index differences,analyses the climbing plants in the different life forms and different climbing patterns resource acquisition strategy and resource allocation strategy,and the differences of their growth strategies were analyzed synthetically.The main research results are as follows:(1)The resource acquisition strategy of climbing plants is determined by the combination trade-off between leaf functional traits.Among different life forms,vines had a relatively "fast resource acquisition-growth" strategy,while lianas had a relatively "slow resource acquisitiongrowth" strategy.Between different climbing patterns,the resource acquisition strategy in four climbing patterns of vines was determined by the trade-off between leaf functional traits: SLA,LNC and LDMC,LMA,and C/N,it showed a transition from the relatively "fast resource acquisition-growth" strategy of tendrils class to the relatively "faster resource acquisitiongrowth" strategy of stems twining class,and then to the relatively "slow resource acquisitiongrowth" strategy of petioles twining and sprawling class;The resource acquisition strategy in three climbing patterns of lianas was determined by the trade-off between leaf functional traits:LA,SLA,LNC and LDMC,LMA,and C/N,it shows a transition from the relatively "fast resource acquisition-growth" strategy of tendrils class to the relatively "slow resource acquisition-growth" strategy of stems twining and sprawling class.(2)The resource allocation strategies of climbing plants in different climbing patterns and different life forms were different,that is,they had different biomass allocation models.Among different life forms,vines allocated biomass mainly to leaves,while lianas allocated biomass mainly to stems and roots.And between different climbing patterns,among the vines,stems twining class allocated more biomass to stems,tendril and sprawling class allocated more biomass to leaves,and petioles twining class allocated more biomass to roots.Among the lianas,stems twining and sprawling class allocated more biomass to stems,while tendrils class allocate more biomass to roots.In conclusion,climbing plants of different climbing patterns and different life forms have different growth strategies.Among different life forms,vines had a relatively "rapid resource acquisition-growth" strategy,and they mainly allocated biomass to their leaves to enhance their light harvesting ability to obtain resources,lianas had a relatively "slow resource acquisitiongrowth" strategy and they acquire resources by allocating biomass to stems and roots to enhance their spatial expansion ability and underground part resource acquisition ability.Between different climbing patterns,among vines,tendrils class was relatively "rapid resource acquisition-growth" strategy,which mainly allocated biomass to leaves,which reflects that tendrils class obtain sufficient resources mainly by changing leaf morphology and investing to increase their light harvesting ability;Stems twining class was relatively "fast resource acquisition-growth" strategy,which mainly allocated biomass to the stems,and forms longer twining stems to cling to the host to achieve better light environment;Sprawling class had a relatively "slow resource acquisition-growth" strategy,which enhanced their resource competitiveness in the low light environment by increasing its SSL and allocating more biomass to the leaves;Petioles twining class was relatively "slow resource acquisition-growth" strategy,which mainly allocated more biomass to roots to enhance the resource competition ability of underground parts.Among lianas,tendrils class were relatively "rapid resource acquisitiongrowth" strategy,which mainly invested biomass into roots to obtain more resources;Stems twining and sprawling class was relatively "slow resource acquisition-growth" strategy,which mainly allocated biomass to stems to obtain more resources.