Arid
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
ISSN0034-7744
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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