Erythronium: Comparative Phenology of Alpine and Deciduous Forest Species in Relation to Environment
Erythronium: Comparative Phenology of Alpine and Deciduous Forest Species in Relation to Environment
复制标题
Erythrium：高山和落叶林物种与环境关系的比较物候学
DOI：
10.2307/2423794
复制
发表时间：
1969
影响因子：
0.6
通讯作者：
M. L. Caldwell
中科院分区：
文献类型：
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作者：
M. L. Caldwell
落基山脉的高山刺五加和北卡罗来纳州落叶林的脐带刺都经历了很短的生长季，在许多方面都是相似的。初春落叶森林地面和盛夏高山雪堆边界的温度状况相似，尽管西部的平均温度较高，日波动较小。然而，西方的太阳辐射要高得多。土壤在质地和化学性质上都惊人地相似。这两个物种都是在各自环境中日照最高的时期生长的。然而，这两个物种都能够在非常低的温度下生长。一般物候响应与地面附近的气温有很好的相关性。两个物种的生长起始温度控制和发育所需的总度数小时是相似的。这两种植物在其生长季节都表现出可测量的水分胁迫。
The alpine Erythronium grandiflorum of the Rocky Mountains and E. umbilicatum of the North Carolina deciduous forest both experience very short growing seasons which are similar in many respects. The temperature regimes of the deciduous forest floor in the early spring and of the alpine snowbank border in midsummer were found to be similar, although the average temperature in the West was higher with fewer diurnal fluctuations. However, solar radiation was considerably higher in the West. Soils were strikingly similar in both textural and chemical properties. Both species grew during the periods of highest insolation in their respective environments. However, both species were able to grow at very low temperatures. The general phenological responses were found to be well correlated with air temperature near the ground. The temperature control of growth initiation and the total degree-hours required for development were similar for both species. Neither species exhibited measurable water stress during its growing season.