Solar irradiance as the proximate cue for flowering in a tropical moist forest

Solar irradiance as the proximate cue for flowering in a tropical moist forest
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太阳辐照度是热带潮湿森林开花的直接线索

DOI:
10.1111/btp.12522
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发表时间:
2018
期刊:
影响因子:
2.1
通讯作者:
Calderón, Osvaldo
Calderón, Osvaldo
中科院分区:
环境科学与生态学3区
文献类型:
--
作者:
Wright, S. Joseph;Calderón, Osvaldo

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我们比较了开花时间预测的六个可能的近似线索,包括降雨量和辐照度的季节性变化和开花时间观察超过30年的每周人口普查的19个树木和藤本植物物种从巴罗科罗拉多岛(BCI),巴拿马。关于降雨时间和强度变化的假设未能预测任何物种的开花时间。相比之下,10至12周的一致的高水平的辐照度预测开花时间以及八个物种,和六个或七个星期的快速增加的辐照度水平预测开花时间以及两个物种。没有六个可能的接近线索预测开花时间充分其余九个物种。我们的结论是,高水平和不断增加的辐照度是在许多BCI物种开花的近似线索。热带辐合带的季节性运动导致云量、大气透过率和到达BCI森林的辐照度的强烈季节性变化。热带辐合带运动时间的年际变化是这些物种开花时间年际变化的最可能原因。许多工作仍有待完成,因为连接开花和辐照度的生理机制是未知的,并且对于许多其他BCI物种,开花的近似线索仍有待确定。
We compared flowering times predicted by six possible proximate cues involving seasonal changes in rainfall and irradiance and flowering times observed over 30 years of weekly censuses for 19 tree and liana species from Barro Colorado Island (BCI), Panama. Hypotheses concerning variation in the timing and intensity of rainfall failed to predict flowering times in any species. In contrast, 10 to 12 weeks of consistent high levels of irradiance predicted flowering times well for eight species, and six or seven weeks of rapidly increasing levels of irradiance predicted flowering times well for two species. None of the six possible proximate cues predicted flowering times adequately for the nine remaining species. We conclude that high and increasing levels of irradiance are the proximate cues for flowering in many BCI species. The seasonal movements of the Intertropical Convergence Zone cause strong seasonal changes in cloud cover, atmospheric transmissivity, and irradiance reaching the BCI forest. Inter‐annual variation in the timing of movements of the Intertropical Convergence Zone is the most likely cause of inter‐annual variation in the timing of flowering in these species. Much work remains to be done as the physiological mechanisms linking flowering and irradiance are unknown and the proximate cues for flowering remain to be identified for many other BCI species.
不规则的气流引发亚洲非季节性热带森林的大规模开花
DOI: --
发表时间: 2006
期刊: American Journal of Botany 93
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