Lemus-Jiménez Luis José, Ramírez Nelson
Universidad Nacional Experimental Francisco de Miranda, Programa de Ingeniería Agronómica, Departamento de Ambiente y Tecnología Agrícola, Coro, Estado Falcón, Venezuela.
Acta Cient Venez. 2002;53(4):266-78.
Reproductive phenology of 51 plant species was evaluated according to life form and vegetation types in a coastal plain of the Paraguaná Peninsula, Estado Falcón, Venezuela. Plant species distribution according to three vegetation types (herbaceous littoral, herbaceous psamophil, and mangrove area) was determined. Life form frequency was different according to vegetation type. Herbaceous littoral and herbaceous psamophil vegetation were dominated by herbaceous species; woody species were mostly frequent in the mangrove vegetation. Phenological data revealed that 14 (27.5%) plant species flower and fruit year-round; 23 (45.1%) plant species flower and fruit at the beginning of the wet season; seven (13.7%) plant species flower at the end of wet season, and seven (13.7%) more flower at the beginning of the dry season. Flowsring and fruiting phenology showed similar frequency distribution during the year; reproductive phenology was independent of life forms. Flowering and fruiting peaks occurred during the rainy season and the beginning of the dry season for trees and perennial herbs, and from one to three months later for shrubs and annual herbs. The lowest proportion of flowering and fruiting occurred before rain increase for all life forms. Flowering and fruiting phenologies were similar for the three vegetation types evaluated: flowering peak occurred during the lowest value of precipitation, three to four months after precipitation peak, and fruiting peak occurred four months later from the precipitation peak. These results suggest that flowering and fruiting phenology were not affected by life form and vegetation types. The peaks of flowering and fruiting during the lowest values of precipitation may be considered as a slow and late response to the precipitation maximum, and to the proximity between maximum and minimum of precipitation.
在委内瑞拉法尔孔州帕拉瓜纳半岛的沿海平原，根据生活型和植被类型对51种植物的繁殖物候进行了评估。确定了三种植被类型（草本滨海、草本沙生和红树林区域）的植物物种分布。生活型频率因植被类型而异。草本滨海和草本沙生植被以草本物种为主；木本物种在红树林植被中最为常见。物候数据显示，14种（27.5%）植物全年开花结果；23种（45.1%）植物在雨季开始时开花结果；7种（13.7%）植物在雨季结束时开花，另外7种（13.7%）在旱季开始时开花。开花和结果物候在一年中的频率分布相似；繁殖物候与生活型无关。树木和多年生草本的开花和结果高峰出现在雨季和旱季开始时，灌木和一年生草本则在一到三个月后出现。所有生活型在降雨增加前开花和结果的比例最低。所评估的三种植被类型的开花和结果物候相似：开花高峰出现在降水量最低值时，在降水量高峰后三到四个月，结果高峰出现在降水量高峰后四个月。这些结果表明，开花和结果物候不受生活型和植被类型的影响。降水量最低值时的开花和结果高峰可被视为对降水最大值以及降水最大值与最小值之间接近程度的缓慢而延迟的响应。
