环境和生物因子对黄河三角洲滨海湿地净生态系统CO_2交换的影响

CORC > 烟台海岸带研究所 > 中国科学院烟台海岸带研究所 > 中科院海岸带环境过程与生态修复重点实验室

	环境和生物因子对黄河三角洲滨海湿地净生态系统CO_2交换的影响
	初小静 ; 韩广轩; 朱书玉 ; 吕卷章 ; 于君宝
刊名	应用生态学报
	2016-04-18
卷号	27 期号:7 页码:2091-2100
关键词	净生态系统CO2交换温度敏感系数光响应温度响应生物因子环境因子
ISSN号	1001-9332
其他题名	Effect of environmental and biotic factors on net ecosystem CO2 exchange over a coastal wetland in the Yellow Ｒiver Delta．
通讯作者	韩广轩,中国科学院烟台海岸带研究所，E-mail：gxhan@yic.ac.cn
产权排序	中国科学院烟台海岸带研究所/中国科学院海岸带环境过程与生态修复重点实验室;中国科学院大学;黄河三角洲国家级自然保护区管理局;鲁东大学地理与规划学院;
中文摘要	通过涡度相关和微气象观测技术,对黄河三角洲滨海湿地净生态系统CO_2交换(NEE)以及环境、生物因子进行了观测,探究湿地NEE变化规律及环境和生物因子对NEE的影响.结果表明:在日尺度上,生长季NEE呈明显"U"型曲线,非生长季变幅较小;在季节尺度上,NEE生长季波动较大,表现为碳汇,非生长季波动较小,表现为碳源;在年尺度上,滨海湿地生态系统表现为碳汇,总净固碳量为-247 g C·m~(-2).白天NEE主要受控于光合有效辐射(PAR),且生态系统表观量子产量(α)与白天生态系统呼吸(R_(eco,d))均于8月达到最大值,最大光合速率(A_(max))于7月达到最大值;夜间NEE随气温(T...
英文摘要	Using the eddy covariance technique, we measured the net ecosystem CO2 exchange （NEE） and its environmental and biotic factors over a coastal wetland in the Yellow River Delta to investigate the diurnal and seasonal variation in NEE and quantify the effect of environmental and biotic factors on NEE. The results showed that the diurnal change of NEE showed a distinct U-shaped curve during the growing season, but not with substantial variation in its amplitude during the non-growing season. During the growing season, the wetland acted as a significant net sink for CO2, while it became carbon source during the non-growing season. On the scale of a whole year, the wetland functioned as a strong carbon sink of -247 g C · m-2. Daytime NEE was mainly domi- nated by photosynthetically active radiation （PAR）. Apparent quantum yield （a） and daytime res- piration of ecosystem （Reco,d） reached maximum in August, while maximum photosynthesis rate （Am=） reached its maximum in July. Nighttime NEE had an exponential relationship with air tern-perature （Ta）. The mean value of temperature sensibility coefficient （Q10） was 2.5, and it was pos- itively related to soil water content （SWC）. During the non-growing season, NEE was negatively correlated with net radiation （R,）, but not with other environmental factors significantly. However, during the growing season NEE was significantly correlated with Rn, Ta, soil temperature at 10 cm depth （ Ts 10） and leaf area index （LAI）, but not with aboveground biomass （AGB）. Stepwise mul- tiple regression analysis indicated that Rn and LAI explained 52% of the variation in NEE during the growing season.
收录类别	CSCD
语种	中文
CSCD记录号	CSCD:5749535
内容类型	期刊论文
源URL	[http://ir.yic.ac.cn/handle/133337/17421]
专题	烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室烟台海岸带研究所_滨海湿地实验室
作者单位	1.中国科学院烟台海岸带研究所/中国科学院海岸带环境过程与生态修复重点实验室 2.中国科学院大学 3.黄河三角洲国家级自然保护区管理局 4.鲁东大学地理与规划学院
推荐引用方式 GB/T 7714	初小静,韩广轩,朱书玉,等. 环境和生物因子对黄河三角洲滨海湿地净生态系统CO_2交换的影响[J]. 应用生态学报,2016,27(7):2091-2100.
APA	初小静,韩广轩,朱书玉,吕卷章,&于君宝.(2016).环境和生物因子对黄河三角洲滨海湿地净生态系统CO_2交换的影响.应用生态学报,27(7),2091-2100.
MLA	初小静,et al."环境和生物因子对黄河三角洲滨海湿地净生态系统CO_2交换的影响".应用生态学报 27.7(2016):2091-2100.