Soil microbial biomass, nutrient availability and nitrogen mineralization potential among vegetation-types in a low arctic tundra landscape
文献类型：期刊论文
| 作者 | Chu, Haiyan1,2; Grogan, Paul1 |
| 刊名 | PLANT AND SOIL
 |
| 出版日期 | 2010-04-01 |
| 卷号 | 329期号:1-2页码:411-420 |
| 关键词 | Arctic tundra soils Vegetation-type Nutrient availability Microbial biomass Nitrification Nitrogen mineralization |
| ISSN号 | 0032-079X |
| DOI | 10.1007/s11104-009-0167-y |
| 通讯作者 | Chu, Haiyan(chuh@queensu.ca) |
| 英文摘要 | Arctic plant communities vary greatly over short distances due to heterogeneities in topography and hydrological conditions across the landscape. Recent evidence suggests substantial changes in vegetation including increasing shrub cover and density in the Arctic over the past three decades that may be in response to climate change. We investigated soil microbial biomass, nutrient availability, nitrogen (N) mineralization potential and nitrification potential in four of the principal vegetation-types across the low Arctic: dry heath, birch hummock, tall birch and wet sedge. Soil total carbon (C) and N contents, microbial biomass C, dissolved organic C (DOC) and N (DON), mineral N, and N mineralization potential differed considerably among vegetation-types. Tall birch and wet sedge soils had significantly higher DON, mineral N, and N mineralization potential than birch hummock or dry heath soils. Soil N mineralization potential across all soils was positively correlated with soil available C and N, and negatively correlated with soil total C:N ratios. Nitrification potential was negligible in all soils. These results demonstrate close relationships between soil biogeochemical properties, mineral N supply rates, and vegetation-types across an arctic landscape. Our soil N mineralization data suggest that climate warming may enhance N availability in tall birch soils more than in birch hummock soils, and therefore that increases in shrub densities across the landscape are most likely within and directly around current tall shrub patches. |
| 收录类别 | SCI |
| WOS关键词 | CARBON-DIOXIDE EXCHANGE ; ORGANIC-CARBON ; CLIMATE-CHANGE ; SLAVE PROVINCE ; LATITUDE SOILS ; HUMMOCK TUNDRA ; PLANT ; RESPONSES ; ECOSYSTEMS ; CO2 |
| WOS研究方向 | Agriculture ; Plant Sciences |
| WOS类目 | Agronomy ; Plant Sciences ; Soil Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000275543300032 |
| 出版者 | SPRINGER |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2558834 |
| 专题 | 南京土壤研究所 |
| 通讯作者 | Chu, Haiyan |
| 作者单位 | 1.Queens Univ, Dept Biol, Kingston, ON K7L 3N6, Canada 2.Chinese Acad Sci, Inst Soil Sci, Nanjing 210008, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chu, Haiyan,Grogan, Paul. Soil microbial biomass, nutrient availability and nitrogen mineralization potential among vegetation-types in a low arctic tundra landscape[J]. PLANT AND SOIL,2010,329(1-2):411-420. |
| APA | Chu, Haiyan,&Grogan, Paul.(2010).Soil microbial biomass, nutrient availability and nitrogen mineralization potential among vegetation-types in a low arctic tundra landscape.PLANT AND SOIL,329(1-2),411-420. |
| MLA | Chu, Haiyan,et al."Soil microbial biomass, nutrient availability and nitrogen mineralization potential among vegetation-types in a low arctic tundra landscape".PLANT AND SOIL 329.1-2(2010):411-420. |
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来源：南京土壤研究所
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