Bacteria dominate ammonia oxidation in soils used for outdoor cattle overwintering |
| |
| Institution: | 1. Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China;2. College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China;3. Center for Applied Geosciences, University of Tübingen, Tübingen 72074, Germany;4. Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China;5. Hawkesbury Institute for the Environment, University of Western Sydney, Penrih 2751, New South Wales, Australia;6. Global Centre for Land-Based Innovation, University of Western Sydney, Penrith 2751, New South Wales, Australia;7. State Key Lab of Urban and Regional Ecology, Research Center for Eco-environmental Sciences, Beijing 100085, China;1. Independent Researcher, United States;2. Department of Supply Chain Management, Eli Broad College of Business, Michigan State University, East Lansing, MI, United States |
| |
| Abstract: | In areas used for cattle overwintering detrimental effects normally associated with grazing are intensified. Among the alterations observed, increases on the N availability and soil pH may highly influence structure of ammonia oxidizing microbes and thus influence nitrification pattern in soil. To evaluate this assumption, we assessed the abundance and diversity of ammonia oxidizing bacteria (AOB) and archaea (AOA) in three sites with different degrees of animal impact (severe, moderate or no impact) of an overwintering pasture by means of qPCR and T-RFLP of amoA genes. In areas where no animal impact could be identified AOA was dominating over AOB. However, AOB abundance increased as the degree of animal impact enhances, becoming most dominant in the severely impacted site. Interestingly, the diversity of AOB was the highest in the severely impacted area, where AOA diversity was the lowest. Obviously the pressure imposed by altered environmental conditions created by cattle husbandry lead to the selection of AOB and AOA populations, adapted to alkaline pH and higher ammonia concentration. |
| |
| Keywords: | Ammonia oxidation Bacteria Archaea Urea Pasture |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
