Growth performance of Phragmites australis in Japan:: influence of geographic gradient
Growth performance of Phragmites australis in Japan:: influence of geographic gradient
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DOI：
10.1016/s0098-8472(02)00114-4
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发表时间：
2003-08-01
影响因子：
5.7
通讯作者：
Yutani, K
中科院分区：
文献类型：
--
作者：
Karunaratne, S;Asaeda, T;Yutani, K
尽管芦荟在亚洲和其他大陆的许多地区在不同的气候和栖息地条件下大量发生，但对芦荟的研究大多局限于欧洲大陆的地点。在将结果从一个地理位置转换到另一个地理位置时，纬度对澳大利亚白杨的生长和物候特征的影响是重要的，以有效地管理和保护芦苇林。因此，通过与欧洲和澳大利亚已发表的野外研究结果进行比较，研究了日本崎玉县秋叶公园内南方红松地上和地下生物量、林分形态和产量以及辐射条件的季节变化对南方红豆杉生长表现的影响，以检验以下假设：(A)南方红豆杉在特定生长阶段的总消光系数可能受到太阳高度的影响；(B)南方红豆杉的物候和生长/生产特征可能与纬度有关。南方红松产量中等，地上净生产量为1980 g m(-2)，地下净生产量为1240 g m(-2)，最大枝密度为120 9枝/m(2)。结果表明，不同生长阶段的总消光系数x与太阳高度有关，呈二次分布(kappa=-7.58+0.28theta-0.002theta(2))。因此，在详细的生产研究中，应始终为x提供其各自的0值，以估计光衰减特性。通过对不同地理梯度的南美白对虾生长表现的比较，揭示了它们在物候和生长/生产性状上的差异。北纬(欧洲大陆)新梢生长和穗部形成早于日本(亚洲大陆)，南纬(澳大利亚大陆)晚于日本(亚洲大陆)。基于Cd的生长参数与纬度之间存在很强的相关性，说明了不同地理区域的物候和生长/生产性状对温度的依赖。讨论了这些结果对南美白对虾适应较冷气候的可能影响。(C)2003 Elsevier Science B.V.保留所有权利。
Most of the research on Phragmites australis is restricted to sites on the European continent even though P. australis occurs abundantly in many regions in the Asian and other continents under different climatic and habitat conditions. The effect of latitude on the growth and phenological characteristics of P. australis is of importance When translating results from one geographic site to another to effectively manage and conserve reed stands. Therefore, the effects of seasonal variations of above- and below-ground biomass, stand morphology and production, and radiation conditions on growth performance of a P. australis stand in Akigase Park in Saitama Prefecture, Japan, were investigated to examine the hypotheses that: (a) the overall light extinction coefficient of P. australis at a given growth stage may be modified by the sun elevation; and (b) phenological and growth/production traits of P. australis may be correlated with the latitude, by comparing the present study with published field studies from Europe and Australia. The P. australis stand was moderately productive, having a net aerial and below-ground production of 1980 and 1240 g m(-2), respectively, and a maximum shoot density of 120 9 shoots per m(2). We found that the overall light extinction coefficient, x, at the different growth stages of P. australis depends on sun elevation, 0, displaying a quadratic distribution (kappa = -7.58+0.28theta-0.002theta(2)). Therefore, in detailed production studies; x should always be presented with its respective 0 values to estimate light attenuation characteristics. The comparison of the growth performance of P. australis across the geographic gradient revealed differences in phenological and growth/production traits. Shoot growth and panicle formation started earlier in northern latitudes (on the European continent) and later in southern latitudes (on the Australian continent) than in Japan (on the Asian continent). Strong correlations were observed between the C-day-based growth parameters and the latitudes illustrating the dependence of the phenological and growth/production traits on temperature in the different geographic regions. These results are discussed with respect to possible effects on adaptation of P. australis to colder climates. (C) 2003 Elsevier Science B.V. All rights reserved.