Knowledge Resource Center for Ecological Environment in Arid Area
Interpopulation reproductive synchrony of Agave cocui (Agavaceae) in Venezuela | |
Figueredo, Carmen J.1; Luis Villegas, Jose2; Nassar, Jafet M.1 | |
通讯作者 | Figueredo, Carmen J. |
来源期刊 | REVISTA DE BIOLOGIA TROPICAL
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ISSN | 0034-7744 |
出版年 | 2011 |
卷号 | 59期号:3页码:1359-1370 |
英文摘要 | Interpopulation reproductive synchrony of Agave cocui (Agavaceae) in Venezuela. Agave cocui (Agavaceae) is a species with broad distribution in arid and semiarid areas of Venezuela and Colombia. Despite of its ecological importance as a source of food for wildlife, and its economic value for production of a spirit drink, studies on the reproductive ecology of the species are relatively rare. In this study, we conducted a one-year evaluation of the flowering and fruiting phenology of A. cocui in the eight representative localities of the species’ distribution in Venezuela. Within each study site, we chose an area with a minimum of 50 reproductive individuals and followed their reproductive phenophases with the help of binoculars, using six qualitative cathegories (emerging reproductive stalk, flowers, inmature fruits, mature fruits, bulbils and dry stalk) every two months. Emergence of the reproductive stalk in most of the examined populations began in September (rainy season), although this event delayed two months in a few populations. We detected significant negative correlations between precipitation and the percentage of flowering occurrence in four of the eight populations. Floral resources are available for flower visitors during approximately five months of the year (January-May). In most populations production of flowers initiated in January (dry season), and for Western Venezuela and Andean regions, the flowering main peak occurred in January. Localities from the Central and Eastern Coast exhibited the flowering peak in March, showing a delay of approximately two months with respect to other populations. Beginning of fruit set varied among localities from January to May; however, peak production of mature fruits concentrated in May, and fruit occurrence varied broadly between 5.2 and 85%. Bulbil production was detected in all populations and varied greatly among them (maximum percentage per population: 26.19-92.10%). High flowering synchronicity (Phenophase Overlapping Index: 0.756 and 0.999) was observed among all populations monitored in Western Venezuela, including the Andean localities. This condition might facilitate the existence of a nectar corridor from the Western Coast and nearby islands, to the Andean arid patches, which could be potentially used by nectar-feeding bats and birds dependent on agave flowers during part of the year. Rev. Biol. Trop. 59 (3): 1359-1370. Epub 2011 September 01. |
英文关键词 | Agavaceae arid zone flowering nectar corridors reproductive synchrony |
类型 | Article |
语种 | 西班牙语 |
国家 | Venezuela |
收录类别 | SCI-E |
WOS记录号 | WOS:000296115200034 |
WOS关键词 | MEXICAN TROPICAL DESERT ; NECTAR-FEEDING BATS ; MACROACANTHA AGAVACEAE ; FLOWERING TIME ; LEPTONYCTERIS-CURASOAE ; POLLINATION BIOLOGY ; DRY SEASON ; PLANT ; PHENOLOGY ; ECOLOGY |
WOS类目 | Biology |
WOS研究方向 | Life Sciences & Biomedicine - Other Topics |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/170423 |
作者单位 | 1.Inst Venezolano Invest Cient, Ctr Ecol, Caracas 1020A, Venezuela; 2.Inst Venezolano Invest Cient, Ctr Fis, Caracas 1020A, Venezuela |
推荐引用方式 GB/T 7714 | Figueredo, Carmen J.,Luis Villegas, Jose,Nassar, Jafet M.. Interpopulation reproductive synchrony of Agave cocui (Agavaceae) in Venezuela[J],2011,59(3):1359-1370. |
APA | Figueredo, Carmen J.,Luis Villegas, Jose,&Nassar, Jafet M..(2011).Interpopulation reproductive synchrony of Agave cocui (Agavaceae) in Venezuela.REVISTA DE BIOLOGIA TROPICAL,59(3),1359-1370. |
MLA | Figueredo, Carmen J.,et al."Interpopulation reproductive synchrony of Agave cocui (Agavaceae) in Venezuela".REVISTA DE BIOLOGIA TROPICAL 59.3(2011):1359-1370. |
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