A theoretical analysis and field evaluation of a light and temperature model of production by Ecklonia cava
A theoretical analysis and field evaluation of a light and temperature model of production by Ecklonia cava
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Ecklonia cava 光温生产模型的理论分析和现场评估
DOI：
10.1023/a:1017086012839
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发表时间：
1999
期刊：
影响因子：
2.6
通讯作者：
M. Honda
中科院分区：
文献类型：
--
作者：
M. Honda
光合作用对光和温度的依赖性是通过分析光系统的跃迁几率来模拟的。在该模型中，两个跃迁几率是光的函数，一个跃迁几率是温度的函数。在20 °C下，Ecklonia cavablades的光饱和光合作用估计值为0.037 mg C cm− 2 h −1。活化能、标准焓和标准熵分别为56.5 kJ mol−1、204 kJ mol− 1和678 J mol− 1 K −1。一个生产模型（积分光合作用模型）的一个E。Cavastand是利用光合作用模型开发的。模型计算的产量与实测值吻合较好。在日本三浦半岛西侧的一个野外观测点，分析了光照和温度对E.结果表明：1.产量随光照强度的降低而降低。当生物量为3 kg湿质量m-2（叶片：菌柄比为2 kg m-2：1 kg m-2），温度为20 ° C时，估算的补偿辐照度为26.5μmol photons m-2s-1。最适温度的最高估计值为24.0 °C。当生物量为12 kg湿质量m-2，光子辐照度为200 μmol photons m-2s-1.3时，最适温度为18.2 °C。在400 μmol光子m−2s− 1和20 °C下，生物量（叶片：柄= 2：1）的估计值给出最大产量约为5.3 kg湿质量m−2。然而，在100 μmol光子m−2s− 1和24 °C下，估计值约为3.0 kg湿质量m−2。两种条件下的最大产量估计值分别为1.05和0.30 g C m− 2 h −1。
The dependence of photosynthesis on light and temperature is modelled through analysis of transition probabilities of photosystems. In the model, two transition probabilities are functions of light, and one transition probability is a function of temperature. The estimated light-saturated photosynthesis ofEcklonia cavablades at 20 °C was 0.037 mg C cm−2h−1. The value of the activation energy, the standard enthalpy and the standard entropy were estimated to be 56.5 kJ mol−1, 204 kJ mol−1and 678 J mol−1K−1, respectively. A production model (an integral photosynthesis model) for anE. cavastand was developed using the photosynthesis model. Production calculated by the model agreed well with observed data during the growing period of anE. cavastand at a field observation site on the west side of Miura Peninsula, Japan. Results of the analysis of the effects of irradiance and temperature on the production of theE. cavacommunity by the model are:1.Production decreased with irradiance decrease. The estimated compensation irradiance was 26.5μmol photons m−2s−1when the biomass was 3 kg wet mass m−2(blade:stipe ratio = 2 kg m−2:l kg m−2) and the temperature was 20 °C.2.The optimum temperature decreased when irradiance decreased and when biomass increased. The highest estimated value for the optimum temperature was 24.0 °C. The estimated optimum temperature was 18.2 °C when the biomass was 12 kg wet mass m−2and the photon irradiance was 200 μmol photons m−2s−1.3.The amount of biomass that resulted in the maximum production was influenced by irradiance and temperature. At 400 μmol photons m−2s−1and 20 °C, the estimated value of the biomass (blade:stipe = 2:1) giving the maximum production was about 5.3 kg wet mass m−2. However, at 100 μmol photons m−2s−1and 24 °C, the estimated value was about 3.0 kg wet mass m−2. The estimated values of the maximum production under the two conditions were 1.05 and 0.30 g C m−2h−1, respectively.