Abiotic regulators of soil respiration in desert ecosystems
文献类型：期刊论文
| 作者 | Zhang ; Chen ; Li ; Zhao ; Lihua ; Yaning ; Weihong ; Ruifeng |
| 刊名 | ENVIRONMENTAL GEOLOGY
 |
| 出版日期 | 2009 |
| 卷号 | 57期号:8页码:1855-1864 |
| 关键词 | CARBON-DIOXIDE FLUXES CO2 EFFLUX TEMPORAL VARIATION WATER CONTENT PINE FORESTS TEMPERATURE DEPENDENCE MOISTURE ENVIRONMENT GRASSLANDS |
| ISSN号 | 0943-0105 |
| 通讯作者 | Chen, YI, Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Key Lab Oasis Ecol & Desert Environm, Urumqi 830011, Peoples R China |
| 中文摘要 | Soil temperature and soil moisture are the most important environmental factors controlling soil respiration in mesic ecosystems. However, soil respiration and associated abiotic regulators have been poorly studied in desert ecosystems. In this study, soil respiration was measured using an automated CO2 efflux system (LI-COR 8100), and the effects of soil temperature and moisture on the rate of soil respiration were examined in six desert sites [three communities-Haloxylon ammodendron, Halostachys caspica and Anabasis aphylla at high (B) and low (A) vegetation coverage respectively]. It was found that soil respiration was significantly and positively correlated with soil surface temperature. A multi-variable model of soil temperature and soil moisture could explain 61.9% of temporal variation in soil CO2 efflux at a larger scale. There were significantly negative correlations between soil respiration and soil moisture in Haloxylon ammodendron B and Halostachys caspica B sites, which represented the driest and wettest sites, respectively. The results also showed that soil respiration displayed obvious diurnal and seasonal patterns during the growing season. The Q(10) values for Haloxylon ammodendron A and B, Halostachys caspica A and B, and Anabasis aphylla A and B sites were 1.3, 1.34, 1.58, 1.65, 1.31 and 1.17, respectively, with a cross-site average of 1.39. The results showed that soil respiration was not positively correlated with soil moisture unlike in most mesic ecosystems. However, soil respiration in desert ecosystems is less sensitive to temperature variation than most mesic ecosystems as indicated by the lower Q(10) values possibly due to energy limitation. |
| 收录类别 | SCI |
| 公开日期 | 2011-08-19 |
| 源URL | [http://ir.xjlas.org/handle/365004/10172]  |
| 专题 | 新疆生态与地理研究所_中国科学院新疆生态与地理研究所(2010年以前数据) |
| 推荐引用方式 GB/T 7714 | Zhang,Chen,Li,et al. Abiotic regulators of soil respiration in desert ecosystems[J]. ENVIRONMENTAL GEOLOGY,2009,57(8):1855-1864. |
| APA | Zhang.,Chen.,Li.,Zhao.,Lihua.,...&Ruifeng.(2009).Abiotic regulators of soil respiration in desert ecosystems.ENVIRONMENTAL GEOLOGY,57(8),1855-1864. |
| MLA | Zhang,et al."Abiotic regulators of soil respiration in desert ecosystems".ENVIRONMENTAL GEOLOGY 57.8(2009):1855-1864. |
入库方式： OAI收割
来源：新疆生态与地理研究所
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