Environmental and anthropogenic controls over bacterial communities in wetland soils
Environmental and anthropogenic controls over bacterial communities in wetland soils
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DOI：
10.1073/pnas.0808254105
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发表时间：
2008-11-18
影响因子：
11.1
通讯作者：
Bruland, Gregory L.
中科院分区：
文献类型：
--
作者：
Hartman, Wyatt H.;Richardson, Curtis J.;Bruland, Gregory L.
土壤细菌调节湿地生态地球化学过程，但对它们的分布和丰度的控制知之甚少。北卡罗来纳州沼泽和沼泽中的细菌与佛罗里达州大沼泽地中的细菌有很大的不同，在那里研究的群落沿着营养富集梯度出人意料地相似。细菌的组成和多样性与土壤pH值，土地利用和恢复状况密切相关，但与营养盐浓度关系不大，与湿地类型或土壤碳含量无关。令人惊讶的是，湿地恢复减少细菌多样性，在陆地生态系统的反应相反。社区水平的模式的基础上的几个类群，特别是酸细菌和变形菌的反应，建议恢复和营养状态的细菌指标的承诺。
Soil bacteria regulate wetland biogeochemical processes, yet little is known about controls over their distribution and abundance. Bacteria in North Carolina swamps and bogs differ greatly from Florida Everglades fens, where communities studied were unexpectedly similar along a nutrient enrichment gradient. Bacterial composition and diversity corresponded strongly with soil pH, land use, and restoration status, but less to nutrient concentrations, and not with wetland type or soil carbon. Surprisingly, wetland restoration decreased bacterial diversity, a response opposite to that in terrestrial ecosystems. Community level patterns were underlain by responses of a few taxa, especially the Acidobacteria and Proteobacteria, suggesting promise for bacterial indicators of restoration and trophic status.