Knowledge Resource Center for Ecological Environment in Arid Area
| Do microbial communities in soils of the Bolivian Altiplano change under economic pressures for shorter fallow periods? | |
| Gomez Montano;Lorena | |
| 出版年 | 2012 |
| 学位授予单位 | Kansas State University |
| 英文摘要 | Master of Science Department of Plant Pathology Karen A. Garrett Ari Jumpponen Traditional fallow periods in the Bolivian highlands are being shortened in an effort to increase short-term crop yields, with potential long-term impacts on soil communities. Using 454-pyrosequencing, we characterized fungal and bacterial community responses to (1) the length of fallow period and (2) the presence of the plants Parasthrephia sp. or Baccharis sp. (both locally known as ‘thola’). Thola is widely considered by farmers as beneficial to soil health, although it is also frequently harvested as a source of fuel by farmers. Soils in one study area, Ancoraimes, had higher levels of organic matter, nitrogen and other macronutrients compared to the other study area, Umala. In our analyses, Ancoraimes soils supported more diverse fungal communities, whereas Umala had more diverse bacterial communities. Unexpectedly, the longer fallow periods were associated with lower fungal diversity in Umala and lower bacterial diversity in Ancoraimes. Fungi assigned to genera Verticillium, Didymella, and Alternaria, and bacteria assigned to genera Paenibacillus, Segetibacter, and Bacillariophyta decreased in abundance with longer fallow period. The presence of thola did not significantly affect overall soil fungal or bacterial diversity, but did increase the frequency of some genera such as Fusarium and Bradyrhizobium. Our results suggest that fallow period has a range of effects on microbial communities, and that the removal of thola from the fields impacts the dynamics of the soil microbial communities. |
| 英文关键词 | Microbial communities Fallow period Bolivia Altiplano (highland) region 454-pyrosequencing Ecology (0329) Microbiology (0410) Plant Pathology (0480) |
| 语种 | 英语 |
| URL | http://hdl.handle.net/2097/13726 |
| 来源机构 | Kansas State University |
| 资源类型 | 学位论文 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/246905 |
| 推荐引用方式 GB/T 7714 | Gomez Montano;Lorena. Do microbial communities in soils of the Bolivian Altiplano change under economic pressures for shorter fallow periods?[D]. Kansas State University,2012. |
| 条目包含的文件 | 条目无相关文件。 | |||||
| 个性服务 |
| 推荐该条目 |
| 保存到收藏夹 |
| 导出为Endnote文件 |
| 谷歌学术 |
| 谷歌学术中相似的文章 |
| [Gomez Montano;Lorena]的文章 |
| 百度学术 |
| 百度学术中相似的文章 |
| [Gomez Montano;Lorena]的文章 |
| 必应学术 |
| 必应学术中相似的文章 |
| [Gomez Montano;Lorena]的文章 |
| 相关权益政策 |
| 暂无数据 |
| 收藏/分享 |
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
