太阳辐射对长白山阔叶红松林净生态系统碳交换的影响
EFFECTS OF SOLAR RADIATION ON NET ECOSYSTEM EXCHANGE OF BROADLEAVED-KOREAN PINE MIXED FOREST IN CHANGBAI MOUNTAIN, CHINA
查看参考文献21篇
|
文摘
|
太阳辐射是植物进行光合作用的前提条件,因此成为影响植被吸收大气CO_2的重要环境因子.该研究基于30 min通量和常规气象数据,以相对辐射和晴空指数为指标,分析了2003～2006年生长旺季(6～8月)太阳辐射的改变对长白山阔叶红松(Pinus koraiensis)林净生态系统碳交换(Net ecosystem exchange,NEE)的影响.结果表明:天空有一定云层的覆盖对阔叶红松林碳的净吸收有明显的促进作用.4年里6～8月间生态系统最大光合速率在天空有云覆盖时较晴空条件下分别提高了34%、25%、4%和11%.在晴空指数约为0.5的中等辐射条件下,该生态系统的NEE达到最大.对生态系统碳的净吸收有促进作用的临界相对辐射约为37%,而使该生态系统NEE达到最大的最适相对辐射约为75%.进一步分析表明,天空云量的增多和云层厚度的增加会引起散射辐射比例的增加、大气温度和水汽亏缺程度的降低等环境效应,由此可能会导致冠层光合作用的增加和地上部分呼吸的减弱,从而共同决定了净生态系统碳吸收作用的增强. |
|
其他语种文摘
|
Aims Solar radiation can affect net ecosystem exchange (NEE) of carbon dioxide of forests, because cloud cover alters solar radiation, which in turn alters other environmental factors such as temperature and vapor pressure deficit. Our objective was to analyze the effects of these changes on NEE of broadleaved-Korean pine (Pinus koraiensis) mixed forest in Changbai Mountain. Methods Our analysis was based on 30-min flux data and routine meteorology data for mid-growing season (June to August) for 2003-2006.Important findings Cloud cover significantly increased NEE. The light-saturated maximum photosynthetic rate was enhanced 34%, 25%, 4% and 11% on cloudy days compared with clear days in the four years of study. Relative irradiance and clearness index (k_t) were important in quantifying the effects of cloud cover, cloud shape and cloud thickness on solar radiation. When k_t was about 0.5, NEE reached its maximum. When the relative irradiance was over the critical relative irradiance of 37%, NEE was enhanced; maximum NEE occurred at about 75%. Enhancement of NEE was ascribed to increased canopy assimilation and decreased above-ground respiration, which resulted from increased diffuse radiation and decreased air temperature and vapor pressure deficit with increased cloudiness. |
|
来源
|
植物生态学报
,2009,33(2):270-282 【核心库】
|
|
关键词
|
长白山阔叶红松林
;
净碳交换
;
晴空指数
;
相对辐射
|
|
地址
|
1.
中国科学院地理科学与资源研究所, 北京, 100101
2.
中国科学院沈阳应用生态研究所, 辽宁, 沈阳, 110016
|
|
语种
|
中文 |
|
文献类型
|
研究性论文 |
|
ISSN
|
1005-264X |
|
学科
|
植物学 |
|
基金
|
国家自然科学基金重大项目
;
中国科学院知识创新工程重要方向项目
;
国家973计划
|
|
文献收藏号
|
CSCD:3558248
|
参考文献 共
21
共2页
|
|
1.
Alton PB. The impact of diffuse sunlight on canopy light-use efficiency gross photosynthetic product and net ecosystem exchange in three forest biomes.
Global Change Biology,2007,13:1-12
|
被引
2
次
|
|
|
|
|
2.
Aubinet M. Long term carbon dioxide exchange above a mixed forest in the Belgian Ardennes.
Agricultural and Forest Meteorology,2001,108:293-315
|
被引
39
次
|
|
|
|
|
3.
Falge E. Gap filling strategies for defensible annual sums of net ecosystem exchange.
Agricultural and Forest Meteorology,2001,107:43-69
|
被引
252
次
|
|
|
|
|
4.
Gilmanov TG. Partitioning European grassland net ecosystem CO_2 exchange into gross primary productivity and ecosystem respiration using light response function analysis.
Agriculture, Ecosystems and Environment,2007,121:93-120
|
被引
28
次
|
|
|
|
|
5.
Goulden ML. Physiological responses of a black spruce forest to weather.
Journal of Geophysical Research,1997,102:28987-28996
|
被引
36
次
|
|
|
|
|
6.
Gu LH. Advantages of diffuse radiation for terrestrial ecosystem productivity.
Journal of Geophysical Research,2002:107
|
被引
1
次
|
|
|
|
|
7.
Gu LH. Responses of net ecosystem exchanges of carbon dioxide to changes in cloudiness:results from two North American deciduous forests.
Journal of Geophysical Research,1999,104:31421-31434
|
被引
1
次
|
|
|
|
|
8.
关德新. Meteorological control on CO_2 flux above broad-leaved Korean pine mixed forest in Changbai Mountains.
中国科学D辑.Ⅱ(in Chinese),2004,34(Suppl):103-108
|
被引
30
次
|
|
|
|
|
9.
Guan DX. CO_2 fluxes over an old,temperate mixed forest in northeastern China.
Agricultural and Forest Meteorology,2006,137:138-149
|
被引
25
次
|
|
|
|
|
10.
Law BE. Environmental controls over carbon dioxide and water vapor exchange of terrestrial vegetation.
Agricultural and Forest Meteorology,2002,113:97-120
|
被引
112
次
|
|
|
|
|
11.
Letts MG. On the relationship between cloudiness and net ecosystem carbon dioxide exchange in a peatland ecosystem.
ECOSCIENCE,2005,12(1):53-59
|
被引
6
次
|
|
|
|
|
12.
Leuning R. A critical appraisal of a combined stomatal-photosynthesis model for C_3 plant.
Plant,Cell & Environment,1995,18:339-355
|
被引
111
次
|
|
|
|
|
13.
Lloyd J. On the temperature dependence of soil respiration.
Functional Ecology,1994,8:315-323
|
被引
352
次
|
|
|
|
|
14.
Reichstein M. On the separation of net ecosystem exchange into assimilation and ecosystem respiration:review and improved algorithm.
Global Change Biology,2005,11:1424-1439
|
被引
135
次
|
|
|
|
|
15.
Urban O. Ecophysiological controls over the net ecosystem exchange of mountain spruce stand.Comparison of the response in direct vs.diffuse solar radiation.
Global Change Biology,2007,13:157-168
|
被引
21
次
|
|
|
|
|
16.
吴家兵. Photosynthetic characteristics of dominant tree species and canopy in the broadleaved Korean pine forest of Changbai Mountains.
中国科学D辑,2006,36(Suppl.Ⅰ):83-90
|
被引
16
次
|
|
|
|
|
17.
张雷明.
中国东部南北样带典型生态系统碳收支特征及其生理生态学机制(PhD dissertation),2006:119-133
|
被引
1
次
|
|
|
|
|
18.
张雷明. Seasonal variation of carbon exchange of typical forest ecosystems along the eastern forest transect in China.
中国科学D辑,2006,36(Suppl.Ⅰ):45-59
|
被引
17
次
|
|
|
|
|
19.
张弥. 长白山阔叶红松林近22年的气候动态.
生态学杂志,2005,24:1007-1012
|
被引
17
次
|
|
|
|
|
20.
赵晓松. 长白山阔叶红松林CO2通量与温度的关系.
生态学报(in Chinese with English abstract),2006,26:1088-1095
|
被引
18
次
|
|
|
|
|
了解气象卫星更多信息，请访问