模拟人工湿地中的植物多样性与系统抵抗力  

Plant diversity and ecosystem resistance in simulated constructed wetlands

作　　者：李丹[1] 刘阳[1] 蒋跃平 任远[1] 杜园园[1] 谷保静[3] 常杰[1] 葛滢[1] 

机构地区：[1]浙江大学生命科学学院,杭州310058 [2]杭州西溪湿地国家公园生态研究中心,杭州310013 [3]浙江大学政策仿真实验室,杭州310058

出　　处：《生态学杂志》2015年第7期1854-1859,共6页Chinese Journal of Ecology

基　　金：国家自然科学基金项目(31170305;31270377)资助

摘　　要：设计模拟人工湿地实验,探究铵干扰下生态系统抵抗力与物种多样性的关系。在90个沙培微宇宙中配置了4个物种丰富度梯度(1、2、3、4),设置了加铵干扰和无干扰2组处理。结果表明:(1)无干扰时植物地上生物量随物种丰富度的增加显著增加,而铵干扰会消解丰富度的正效应;(2)地上生物量对铵干扰的抵抗力与丰富度呈负相关;(3)抵抗力与未干扰的地上生物量负相关;(4)菖蒲(Acorus calamus)在系统中的存在会显著降低系统对铵的抵抗力,其他种无影响。本研究设置了新的干扰类型,拓展了多样性-抵抗力研究。Here we set 90 microcosms to simulate the constructed wetlands. The microcosms were planted with 1, 2, 3 or 4 plant species and were divided into ammonium perturbed and unper- turbed groups. The results showed that： （ 1 ） aboveground biomass increased with species richness in the unperturbed group, but the ammonium perturbation offset the positive effect of species richness; （2） the resistance indicated by aboveground biomass decreased with species richness; （3） the resistance negatively responded to the unperturbed biomass; （4） the presence of Acorus calamus decreased the ecosystem resistance, while the other three species had no such effect. Our study explored the effect of new between diversity and ecosystem type of perturbation and extended resistance. the studies on the relationship

关 键 词：稳定性 物种丰富度 生物量 微宇宙 高氮生境 铵干扰 

分 类 号：Q948[生物学—植物学]