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首页> 外文期刊>Ecotropica >REPRODUCTIVE PHENOLOGY OF THE MAIN TREE SPECIES IN THE RORAIMA SAVANNA, BRAZILIAN AMAZON
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REPRODUCTIVE PHENOLOGY OF THE MAIN TREE SPECIES IN THE RORAIMA SAVANNA, BRAZILIAN AMAZON

机译：巴西亚马逊罗旺玛山草原主要树种的生殖物候学

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The reproductive phenological patterns were investigated in the three most abundant tree species in the Roraima open savanna: Curatella americana L.f (Dilleniaceae), Byrsonima crassifotia (L.) Kunth, and B. coccolobifolia Kunth (Malpighiaceac). A total of 112 trees were marked for study over a period of 24 months (2001 -2003), and the existence of climatic synchrony and duration of phenological phases that characterize the reproductive patterns of each population were investigated. The results indicate (i) in C. americana and B. crassijolia reproductive phenological events were strongly associated with low amounts of rainfall, but climatic synchrony was not clearly pronounced in B. coccolobifolia, (ii) each species demonstrated its own distinct phenophase duration and population synchrony, and (iii) the phenological pattern for the three species can be defined as intermediate {between the beginning and end of the dry season), with all species using zoochory as the principal means of seed dispersal.We conclude that for all three species, the majority of phenological events occur during the dry season peak, which corresponds to the lowest amount of cloud cover and the highest amount of insolation across most of the savanna in Roraima. The phenological patterns and the reproductive cycles of the three species studied are similar to those observed in other savanna regions of Brazilian Amazonia and Venezuela.
机译：在罗赖马开放性稀树草原中三种最丰富的树种中研究了生殖物候模式：美洲小Cur（Curatella americana L.f（Dilleniaceae），疯牛草（Byrsonima crassifotia）（L.）Kunth和球囊双胞菌B. coccolobifolia Kunth（Malpighiaceac）。在24个月（2001年至2003年）的时间内，总共标记了112棵树进行研究，并研究了气候同步性和物候期的持续时间，这些阶段表征了每个种群的繁殖方式。结果表明：（i）在美洲小球藻和巴西小球藻的生殖物候事件与少量降雨密切相关，但在球藻双球菌中气候同步并没有明显地表现出来，（ii）每个物种都表现出其独特的物候期和（iii）这三个物种的物候模式可以定义为中间（干旱季节开始和结束之间），所有物种都使用动物群作为种子传播的主要手段。我们得出结论，对于所有三个物种物种，大多数物候事件发生在干旱季节的高峰期，这对应于罗赖马大部分热带稀树草原的最低云量和最高日照量。所研究的三个物种的物候模式和生殖周期与在巴西亚马逊和委内瑞拉的其他热带草原地区观察到的相似。

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