摘要
【目的】基于东北不同阔叶树种,探讨植物资源获取型与防御型性状的相关性及其驱动因素,揭示木本植物资源获取能力与防御能力的关联,解析木本植物对环境的动态适应机制,为森林生态系统管理提供科学依据。【方法】测定温带森林中5种不同耐荫性阔叶树种白桦、水曲柳、裂叶榆、紫椴、五角槭的叶片、新枝、老枝在3个不同生活史阶段(幼苗、幼树、成年树)的20个植物功能性状,将其划分为资源获取型和防御型性状,探讨木本植物2类性状的相互关联及影响因子。【结果】叶片资源获取能力与植株地上部分防御能力的相关性较弱,不同生活阶段资源获取能力与防御能力的相关性存在差异。幼苗期间,2种能力存在协作关系(夹角<90°);幼树期间,2种能力存在解耦关系(夹角≈90°);成年树阶段,2种能力存在权衡关系(夹角>90°)。综合考虑环境因子(土壤养分、土壤pH、土壤含水率)和植物特性(生活史阶段、耐荫性)对植物资源获取型和防御型性状的影响时,环境因子的影响(PC156%、PC273%)大于植物特性的影响(PC144%、PC227%)。【结论】植物在不同生活史阶段对资源获取与防御的协调策略具有阶段性变化,环境因子是主要驱动因素,但植物特性亦不容忽视。
【Objective】In view of different broadleaved tree species in Northeast China,this study explored the correlation between plant resource acquisition traits and defense traits and their driving factors,to reveal the correlation between the resource acquisition ability and defense ability of woody plants,to analyze the dynamic adaptation mechanism of woody plants to the environment,and to provide a scientific basis for forest ecosystem management.【Method】In this study,we measured 20 phytofunctional traits in leaves,new twigs,and old branchs of five broadleaf species with different shade tolerance in temperate forests,including Betula platyphylla,Fraxinus mandshurica,Ulmus laciniata,Tilia amurensis,and Acer pictum subsp.mono,at three different life-history stages(seedling,sapling,and mature tree),and these traits were divided into resource-acquisition traits and defense traits,to explore the interrelationships and influencing factors of the two types of traits in woody plants.【Result】There was weak correlation between leaf resource acquisition capacity and aboveground defense capacity,and the correlation between resource acquisition capacity and defense capacity varied at different life stages.At the seedling stage,the two capacities had a collaborative relationship(angle<90°);at the sapling stage,the two capacities were decoupled(angle≈90°);and at the mature tree stage,the two capacities had a trade-off relationship(angle>90°).Combining the effects of environmental factors(soil nutrients,soil pH,soil water content)and plant characteristics(life history stages,shade tolerance)on plant resource acquisition traits and defense traits,it was found that environmental factors(PC156%,PC273%)had a stronger effect on the two types of traits than plant characteristics(PC144%,PC227%).【Conclusion】The coordination strategies between resource acquisition and defense vary across different growth stages.While environmental factors serve as the primary driving forces,plant characteristics also play a crucial role.
作者
王凯波
金光泽
刘志理
Wang Kaibo;Jin Guangze;Liu Zhili(School of Ecology,Northeast Forestry University Key Laboratory of Sustainable Forest Ecosystem Management of Ministry of Education,Northeast Forestry University Northeast Asia Biodiversity Research Center,Harbin 150040)
出处
《林业科学》
北大核心
2025年第8期219-230,共12页
Scientia Silvae Sinicae
基金
黑龙江省自然科学基金项目(TD2023C006)
中央高校基本科研业务费专项资金项目(2572025AW59,2572022DS13)
凉水国家级自然保护区专项技术服务项目
关键词
资源获取能力
防御能力
驱动因素
环境因子
生活史
resource acquisition capacity
defense capacity
drivers
environmental factors
life history
