重庆主城河岸带植物群落功能性状与土壤理化性质的关系

Abstract

PDF HTML阅读 XML下载 导出引用 引用提醒 重庆主城河岸带植物群落功能性状与土壤理化性质的关系 DOI: 10.5846/stxb202202160368 作者: 作者单位: 作者简介: 通讯作者: 中图分类号: 基金项目: 重庆市科技兴林项目（2021-9）；西南大学生命科学学院科学基金项目（20212005406201）；宁夏回族自治区重点研发计划项目（2020BFG03006）；中央林业改革发展资金科技推广示范项目（渝林科推2020-2） The relationship between plant functional traits and soil physicochemical properties in the riparian zones of downtown Chongqing Author: Affiliation: Fund Project: 摘要 | 图/表 | 访问统计 | 参考文献 | 相似文献 | 引证文献 | 资源附件 | 文章评论 摘要:基于功能性状视角开展植物群落与环境关系的研究有助于揭示植物的适应策略。然而，目前关于城市河岸带植物群落功能性状的研究较少。为此选取10项植物功能性状指标和14项土壤理化性质指标，探究重庆主城3种生境类型河岸带（自然型河岸带（NRZ）、农耕主导型河岸带（FRZ）和开发建设主导型河岸带（BRZ））植物群落功能性状与土壤因子特征及互作机制。结果表明：（1）与NRZ生境相比，FRZ生境中的土壤速效磷、速效钾和氧化还原电位和BRZ生境中的土壤含水量显著偏高（P<0.05）；FRZ和BRZ生境中的土壤pH值和全磷含量显著偏高，而土壤有机质、全钾和全氮含量显著偏低（P<0.05）。（2）与NRZ生境相比，FRZ生境中的比根长和比根表面积显著较高，茎干物质含量和叶干物质含量显著较低；BRZ生境中仅茎干物质含量显著较低（P<0.05）。（3）冗余分析结果表明，影响各生境类型河岸带植物群落功能性状的土壤因子不同，NRZ生境为土壤容重、含水量和硝态氮，FRZ生境为土壤铵态氮、全磷和有机质，BRZ生境则是土壤含水量、温度和速效磷。研究发现与自然状态相比，农业和建筑类型的人为干扰导致重庆主城河岸带生境发生改变，植物群落通过权衡功能性状组合的策略提高对生境变化的适应性。 Abstract:Studying the relationship between plants and the environment through plant functional traits is of help to reveal plants' adaptation strategies. At present, most researches on the relationship between plant functional traits and environmental factors have mainly focused on the terrestrial ecosystems. Very few similar studies have been carried out in the riparian ecosystems. Riparian vegetation is a prerequisite for riparian ecosystems to function properly, while maintaining healthy watercourse and landscape connectivity. Therefore, our study selected 10 plant functional trait indices and 14 soil physiochemical property indices to explore plant community functional traits, soil factor characteristics and interaction mechanisms of three habitat types (natural riparian zone (NRZ), farming riparian zone (FRZ) and building riparian zone (BRZ)) within the riparian zones of downtown Chongqing. The results showed that:(1) compared with the NRZ habitat, the soil available phosphorus, available potassium and redox potential in the FRZ habitat and the soil moisture in the BRZ habitat were significantly higher (P<0.05). The soil pH value and total phosphorus content were significantly higher in FRZ and BRZ habitats, while soil organic matter, total potassium and total nitrogen content were significantly lower (P<0.05). (2) In comparison to the NRZ habitats, the specific root length and specific root surface area in the FRZ habitats were significantly higher, and the stem dry matter content and leaf dry matter content were significantly lower. Only the stem dry matter content was significantly lower in the BRZ habitats (P<0.05). (3) The results of redundancy analysis showed that the soil factors which affected the functional traits of riparian plant communities in different habitat types were different. For the NRZ habitats, the influencing factors were soil bulk density, soil moisture and nitrate nitrogen. For the FRZ habitats, the influencing factors were soil ammonium nitrogen, total phosphorus and organic matter. For the BRZ habitats, the influencing factors were soil moisture, soil temperature, and available phosphorus. This study found that in comparison to the natural riparian state, the anthropogenic disturbance of agriculture and structural engineering related projects led to changes in the riparian habitats of downtown Chongqing, and that the plant community improved its adaptability to various habitats through trade-off combinations of functional traits. 参考文献 相似文献 引证文献