PREY DENSITY AND RATES OF PREDATION BY TITS (PARUS SPP.) ON LARVAE OF CODLING MOTH (CYDIA POMONELLA) UNDER BARK
PREY DENSITY AND RATES OF PREDATION BY TITS (PARUS SPP.) ON LARVAE OF CODLING MOTH (CYDIA POMONELLA) UNDER BARK
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DOI：
10.2307/2402727
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发表时间：
1979-04
影响因子：
5.7
通讯作者：
Jiabing Wu;D. Guan;Xiaosong Zhao;Shi-jie Han;Guirui Yu;Xiaomin Sun
中科院分区：
文献类型：
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作者：
Jiabing Wu;D. Guan;Xiaosong Zhao;Shi-jie Han;Guirui Yu;Xiaomin Sun
2003年，用CO2红外分析仪连续测定了长白山阔叶红松林的CO2浓度。结果表明：森林CO2浓度具有显著的时空变化特征，主要受植物生理过程、土壤呼吸和湍流交换强度的影响；在生长季，日最大和最小CO2浓度分别主要出现在清晨5点左右的地表和下午15点左右的冠层位置。在黎明逆温破裂时，森林有明显的CO2排放过程。2003年森林平均CO2浓度为377 μ mol x mol(-1)，月平均最大值出现在1月，为388 μ mol x mol(-1)，月平均最小值出现在8月，为352 μ mol x mol（-1）。在生长季节，森林在夜间作为CO2源，在白天转化为CO2汇。在非生长季节，森林在白天和夜间都是CO2源，但在中午仍有明显的CO2同化证据，在非生长季节有冠层位置。
The CO2 concentration in broad-leaved Korean pine forest of Changbai Mountains was measured continuously with a CO2 infra-red analyzer in 2003. The results showed that the CO2 concentration in the forest had striking characteristics of temporal-spatial variations, which were mainly influenced by the physiological processes of plants, soil respiration, and intensity of turbulence exchange. In growing season, the daily maximum and minimum CO2 concentration appeared mostly on the surface floor at about 5:00 in the early morning and at canopy location at about 15:00 in the afternoon, respectively. There was an obviously process of forest CO2 emission when the inversion broke at dawn. The average CO2 concentration in forest was 377 micromol x mol(-1) in 2003, the maximum of monthly average appeared in January as 388 micromol x mol(-1), and the minimum of monthly average appeared in August as 352 micromol x mol(-1). The forest acted as CO2 source in night time and turned to sink in daytime, during growing season. In non-growing season, the forest acted as CO2 source in both daytime and night time, but still had a clear evidence of CO2 assimilation at noon, with canopy location during non-growing season.