地理学报 ›› 2016, Vol. 71 ›› Issue (1): 21-34.doi: 10.11821/dlxb201601002
戴尔阜1,2(), 黄宇3, 吴卓1,2,4, 赵东升1,2
收稿日期:
2015-06-23
修回日期:
2015-10-18
出版日期:
2016-01-31
发布日期:
2016-01-15
作者简介:
作者简介:戴尔阜(1972-), 男, 博士, 研究员, 博士生导师, 中国地理学会会员(S110004569M), 主要研究方向为土地利用和气候变化对生态系统影响.E-mail:
基金资助:
DAI Erfu1,2(), HUANG Yu3, WU Zhuo1,2,4, ZHAO Dongsheng1,2
Received:
2015-06-23
Revised:
2015-10-18
Published:
2016-01-31
Online:
2016-01-15
Supported by:
摘要:
草地净生态系统生产力(NEP)能够表征草地生态系统的固碳能力,直接定性定量地描述草地生态系统的碳源/汇性质和大小.因此,研究区域尺度草地生态系统NEP具有重要的实践意义.基于卫星遥感资料,地面气象观测资料及实地采样数据,结合光能利用率模型估算了2001-2012年内蒙古草地生态系统净初级生产力(NPP).同时,应用土壤呼吸模型估算了逐月平均土壤呼吸量(Rs),进而估算内蒙古草地净生态系统生产力(NEP).研究揭示了2001-2012年内蒙古草地生态系统NPP,NEP年际变化规律,气候因子的年际变化规律,以及草地NPP,NEP与主要气候因子的关系.结果表明:2001年以来,内蒙古草地生态系统整体发挥碳汇效应,净碳汇总量达到0.55 Pg C,年均固碳率约为0.046 Pg C/a;研究区大部分草地NPP,NEP与降水均呈正相关关系,与温度相关性不显著,内蒙古草地生态系统仍有巨大的固碳潜力.
戴尔阜, 黄宇, 吴卓, 赵东升. 内蒙古草地生态系统碳源/汇时空格局及其与气候因子的关系[J]. 地理学报, 2016, 71(1): 21-34.
DAI Erfu,HUANG Yu,WU Zhuo,ZHAO Dongsheng. Spatial-temporal features of carbon source-sink and its relationship with climate factors in Inner Mongolia grassland ecosystem[J]. Acta Geographica Sinica, 2016, 71(1): 21-34.
表1
内蒙古生态地理区划系统
温度带 | 干湿区 | 自然区 | 主要植被 |
---|---|---|---|
I 寒温带 | A(湿润区) | IA1 大兴安岭北段山地落叶针叶林区 | 针叶林,湿地 |
II 中温带 | IIA3 松辽平原东部山前台地针阔叶混交林区 | 针阔混交林,湿地 | |
B(半湿润区) | IIB1 松辽平原中部森林草原区 | 典型草原,农田 | |
IIB2 大兴安岭中段山地草原森林区 | 阔叶林,草甸 | ||
IIB3 大兴安岭北段西侧森林草原区 | 草甸草原,草甸 | ||
C(半干旱区) | IIC1 西辽河平原草原区 IIC2 大兴安岭南端草原区 | 典型草原,农田 典型草原,灌丛 | |
IIC3 内蒙古东部草原区 | 典型草原,农田 | ||
IIC4 呼伦贝尔平原草原区 | 典型草原,草甸 | ||
D(干旱区) | IID1 鄂尔多斯及内蒙古高原西部荒漠草原区 | 典型草原,荒漠 | |
IID2 阿拉善与河西走廊荒漠区 | 荒漠,荒漠草原 | ||
III 暖温带 | B(半湿润区) | IIIB3 华北山地落叶阔叶林区 | 农田,典型草原 |
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