頁籤選單縮合
題名 | 臺中大坑地區稜果榕物候之探討=The Phenology of Ficus septica Burm. f. at Dakeng, Taichung |
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作者 | 何伊喬; 曾彥學; 曾喜育; | 書刊名 | 林業研究季刊 |
卷期 | 33:4 2011.12[民100.12] |
頁次 | 頁21-32 |
分類號 | 373.961 |
關鍵詞 | 稜果榕; 榕果物候; 葉候; 性別分化; 共生授粉; Ficus septica Burm. f.; Fig phenology; Leaf phenology; Seaual differentiation; Mutualism-pollination; |
語文 | 中文(Chinese) |
中文摘要 | 本研究探討台中大坑地區稜果榕之葉候、榕果物候及性別族群間物候之分化現象。調查期間自2007年11月5日-2009年4月2日止,共17個月。觀察發現大坑地區稜果榕之葉候為連續型展葉模式,植株全年可維持一定量之成熟葉,然具有明顯的季節變化;雌、雄株之葉候模式相似,兩性別成熟葉量與平均氣溫及累積降雨量呈顯著正相關,反映環境變化與植物生長具關聯性。稜果榕雌、雄株榕果生產與展葉具極高之同步性;然而於春、夏2季幼葉及成熟葉遭嚴重蟲害,可能導致植株可維持榕果量下降。榕果物候方面,雌株果季數較少於雄株,且集中於春、秋2季,雄株則無集中於特定季節的現象。榕果葉量比方面,雄株在多數時期高於雌株。整體而言,雌、雄株榕果物候具有頻度及數量之分化現象,其可能來自於雌、雄株採取不同的榕果生產策略:雌株採量少質重的投 資,有利於核果發育及榕果傳播之有效性;雄株採量多質輕之策略,除使授粉蜂族群可持續繁衍並可提升花粉傳播機率,此為穩定稜果榕與其授粉蜂共生關係之有效機制。 |
英文摘要 | We presented the traits of leaf and fig phenology in both sexual of Ficus septica Burm. f., acommon dioecious species at Dakeng in center Taiwan during November 2007 to April 2009. We found thepattern of leaf phenology was similar between genders. This phenomenon was successive leaf emergenceand ever green through the year, but the abundance of mature leaves showed seasonally. The quantity ofmature leaves were corresponded positively significant with average temperature and precipitation. Thecorrelation between vegetation and the variation of climate was significantly. Tender leaves were occurredsynchronize with A phase figs production. however, serious damage on tender and mature leaves occurredduring spring to summer 2007 by the larva of moth (Asota heliconia zebrina). We supposed that could leadto the ability of figs maintenance decrease during the pest. In another worlds, there were differences offrequency and quantity between genders. First, the crops number of female trees (3.6±1.7) were lower thanmale trees (4.1±2.4). Second, female trees mainly produced figs in spring and autumn, but male born figsat any time except in summer. Third, the fig/leaf ratio of male trees always higher than female trees exceptduring the pest. To conclude, the sexual differentiation are caused by the different reproductive purposein gender: female trees produced few figs that ensure to complete the development of seeds and increasethe effective of seed dispersal; however, male trees would produce plenty of figs, that is, male trees couldmaintain the population of pollinator and increase the probability on pollen dispersal to effectively stablizedthe mutualism of F. septica and their pollinators. |
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