| 模拟气候变化对３种草原植物群落混合凋落物分解的影响 |
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| 引用本文： | 王其兵,李凌浩,白永飞,邢雪荣. 模拟气候变化对３种草原植物群落混合凋落物分解的影响[J]. 植物生态学报, 2000, 24(6): 674-679 |
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| 作者姓名： | 王其兵 李凌浩 白永飞 邢雪荣 |
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| 作者单位： | [1]中国科学院植物研究所植被数量生态学开放研究实验室,北京 [2]中国科学院植物研究所植被数量生态学开放研究实验,北京 |
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| 基金项目： | 国家重大基础研究项目!(G19990 4340 7)，国家自然科学基金重点项目!(39730 110 )，中国科学院内蒙古草原生态系统定位研究站开放基金 |
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| 摘 要： | 应用海拔引起的自然温度梯度作为气候变化研究的替代系统，结合网袋法，目的在于评价气候变化对草甸草原、羊草(Leymus chinensis )草原和大针茅(Stipa grandis)草原混合凋落物分解过程的可能影响。结果表明：较之当前气候，在气温升高2.7℃，降水基本保持不变的气候变化情景下，3种凋落物的分解速率分别提高了15.38％、35.83％和6.68％；而在温度升高2.2℃或更高，降水降低20％或更高的气候变化情景下，各种凋落物的分解速率将降低。此外，各种凋落物的分解动态对所模拟的气候变化情景的响应不同，但没有发现凋落物分解速率与凋落物本身C、N、C／N间的密切关系。
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| 关 键 词： | 气候变化 海拔梯度 凋落物 分解速度 |
| 修稿时间： | 2000-06-26 |
EFFECTS OF SIMULATED CLIMATE CHANGE ON THE DECOMPOSITION OF MIXED LITTER IN THREE STEPPE COMMUNITIES |
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| WANG Qi Bing LI Ling Hao BAI Yong Fei and XING Xue Rong. EFFECTS OF SIMULATED CLIMATE CHANGE ON THE DECOMPOSITION OF MIXED LITTER IN THREE STEPPE COMMUNITIES[J]. Acta Phytoecologica Sinica, 2000, 24(6): 674-679 |
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| Authors: | WANG Qi Bing LI Ling Hao BAI Yong Fei and XING Xue Rong |
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| Affiliation: | WANG Qi Bing LI Ling Hao * BAI Yong Fei and XING Xue Rong |
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| Abstract: | The objectives of this study were to assess the potential effects of climate change on the decomposition of mixed litter from three steppe communities dominated by Stipa baicalensis, Leymus chinensis,and S. grandis, respectively. We applied the buried bag method along an altitudinal temperature gradient to investigate the potential effect of climate change on litter decomposition. Under current climatic conditions, if the mean air temperature rises 2.7℃ and no change occurs in precipitation, the decomposition rates of the three litter mixtures will increase 15.4%, 35.8% and 6.7%, respectively. If mean air temperature increases by 2.2℃ or more in combination with a 20% or more fall in precipitation, then the decomposition rates of these litter mixtures will decrease. Different responses of decomposition to simulated climate change were observed among the three litter mixtures used in the study. The results contrasted to those reported by other researchers who found close relationships between decomposition rates, the C, N content and C/N ratio of litter mixtures. |
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| Keywords: | Climate change Altitudinal gradient Litter mixture Decomposition |
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