Moderate grazing increased alpine meadow soils bacterial abundance and diversity index on the Tibetan Plateau
Abstract The response of grassland soil bacterial community characteristics to different grazing intensities is central ecological topics. However, the underlying mechanisms between bacterial abundance, diversity index, and grazing intensity remain unclear. We measured alpine meadow soil bacterial g...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2020-08-01
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| Series: | Ecology and Evolution |
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| Online Access: | https://doi.org/10.1002/ece3.6563 |
| _version_ | 1818968454851461120 |
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| author | Yangong Du Xun Ke Licong Dai Guangmin Cao Huakun Zhou Xiaowei Guo |
| author_facet | Yangong Du Xun Ke Licong Dai Guangmin Cao Huakun Zhou Xiaowei Guo |
| author_sort | Yangong Du |
| collection | DOAJ |
| description | Abstract The response of grassland soil bacterial community characteristics to different grazing intensities is central ecological topics. However, the underlying mechanisms between bacterial abundance, diversity index, and grazing intensity remain unclear. We measured alpine meadow soil bacterial gene richness and diversity index under four grazing intensities using 16S rDNA sequence analysis on the Tibetan Plateau. The results suggest that extreme grazing significantly decreased alpine meadow both bacterial gene abundance and diversity index (p < .05). The lowest operational taxonomic unit numbers were 3,012 ± 447 copies under heavy grazing in the growing season. It was significantly lower than heavy grazing with approximately 3,958 ± 119 copies (p < .05). The Shannon index for medium and high grazing grassland bacterial diversity was slightly higher than for light grazing in the growing season. Furthermore, the lowest index was approximately 9.20 ± 0.50 for extreme grazing of grassland in the growing season. The average bacterial gene abundance and diversity index in the dormancy period were slightly higher than that in the growing season. Soil bulk density, pH, ammonium, and nitrate nitrogen were the main positive factors driving grazed grassland bacterial communities. Our study provides insight into the response of alpine meadows to grazing intensity, demonstrating that moderate grazing increases bacterial community diversity in grazed grasslands. |
| first_indexed | 2024-12-20T14:04:57Z |
| format | Article |
| id | doaj.art-3d8fdd51ab1941dc9d82380b964b1796 |
| institution | Directory Open Access Journal |
| issn | 2045-7758 |
| language | English |
| last_indexed | 2024-12-20T14:04:57Z |
| publishDate | 2020-08-01 |
| publisher | Wiley |
| record_format | Article |
| series | Ecology and Evolution |
| spelling | doaj.art-3d8fdd51ab1941dc9d82380b964b17962022-12-21T19:38:16ZengWileyEcology and Evolution2045-77582020-08-0110168681868710.1002/ece3.6563Moderate grazing increased alpine meadow soils bacterial abundance and diversity index on the Tibetan PlateauYangong Du0Xun Ke1Licong Dai2Guangmin Cao3Huakun Zhou4Xiaowei Guo5Qinghai Provincial Key Laboratory of Restoration Ecology for Cold Region Northwest Institute of Plateau Biology Chinese Academy of Sciences Xining ChinaQinghai Provincial Key Laboratory of Restoration Ecology for Cold Region Northwest Institute of Plateau Biology Chinese Academy of Sciences Xining ChinaQinghai Provincial Key Laboratory of Restoration Ecology for Cold Region Northwest Institute of Plateau Biology Chinese Academy of Sciences Xining ChinaQinghai Provincial Key Laboratory of Restoration Ecology for Cold Region Northwest Institute of Plateau Biology Chinese Academy of Sciences Xining ChinaQinghai Provincial Key Laboratory of Restoration Ecology for Cold Region Northwest Institute of Plateau Biology Chinese Academy of Sciences Xining ChinaQinghai Provincial Key Laboratory of Restoration Ecology for Cold Region Northwest Institute of Plateau Biology Chinese Academy of Sciences Xining ChinaAbstract The response of grassland soil bacterial community characteristics to different grazing intensities is central ecological topics. However, the underlying mechanisms between bacterial abundance, diversity index, and grazing intensity remain unclear. We measured alpine meadow soil bacterial gene richness and diversity index under four grazing intensities using 16S rDNA sequence analysis on the Tibetan Plateau. The results suggest that extreme grazing significantly decreased alpine meadow both bacterial gene abundance and diversity index (p < .05). The lowest operational taxonomic unit numbers were 3,012 ± 447 copies under heavy grazing in the growing season. It was significantly lower than heavy grazing with approximately 3,958 ± 119 copies (p < .05). The Shannon index for medium and high grazing grassland bacterial diversity was slightly higher than for light grazing in the growing season. Furthermore, the lowest index was approximately 9.20 ± 0.50 for extreme grazing of grassland in the growing season. The average bacterial gene abundance and diversity index in the dormancy period were slightly higher than that in the growing season. Soil bulk density, pH, ammonium, and nitrate nitrogen were the main positive factors driving grazed grassland bacterial communities. Our study provides insight into the response of alpine meadows to grazing intensity, demonstrating that moderate grazing increases bacterial community diversity in grazed grasslands.https://doi.org/10.1002/ece3.6563alpine meadowbacterial genes richnessdiversity indexgrazing intensity |
| spellingShingle | Yangong Du Xun Ke Licong Dai Guangmin Cao Huakun Zhou Xiaowei Guo Moderate grazing increased alpine meadow soils bacterial abundance and diversity index on the Tibetan Plateau Ecology and Evolution alpine meadow bacterial genes richness diversity index grazing intensity |
| title | Moderate grazing increased alpine meadow soils bacterial abundance and diversity index on the Tibetan Plateau |
| title_full | Moderate grazing increased alpine meadow soils bacterial abundance and diversity index on the Tibetan Plateau |
| title_fullStr | Moderate grazing increased alpine meadow soils bacterial abundance and diversity index on the Tibetan Plateau |
| title_full_unstemmed | Moderate grazing increased alpine meadow soils bacterial abundance and diversity index on the Tibetan Plateau |
| title_short | Moderate grazing increased alpine meadow soils bacterial abundance and diversity index on the Tibetan Plateau |
| title_sort | moderate grazing increased alpine meadow soils bacterial abundance and diversity index on the tibetan plateau |
| topic | alpine meadow bacterial genes richness diversity index grazing intensity |
| url | https://doi.org/10.1002/ece3.6563 |
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