Floral Visitors and Pollination of Psychotria tenuinervis (Rubiaceae): Distance from the Anthropogenic and Natural Edges of an Atlantic Forest Fragment 1
Floral Visitors and Pollination of Psychotria tenuinervis (Rubiaceae): Distance from the Anthropogenic and Natural Edges of an Atlantic Forest Fragment 1
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Psychotria tenuinervis（茜草科）的花客和授粉：与大西洋森林片段 1 的人为和自然边缘的距离
DOI：
10.1111/j.1744-7429.2006.00152.x
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发表时间：
2006
期刊：
影响因子：
2.1
通讯作者：
F. Santos
中科院分区：
文献类型：
--
作者：
F. Ramos;F. Santos
传粉媒介，尤其是昆虫，可能受到森林破碎化的影响。本文的目的是研究在以下方面是否存在差异：1)花游客群落；2)访问频率；(3) 2年来在人工边缘（ae）、自然边缘（NEs）和森林内部（FI）发生的小檗个体的果实和种子套数。2002年东北花区总访花次数多，东南花区总访花次数少，2003年各生境间无明显差异。两年内样地间、生境内均存在差异。蜜蜂是柽柳花最常见的访花者，引进的蜜蜂是最常见的种类。在不同生境中，柽柳的结实、结实和生殖个体密度没有差异。而在2002年，单花果数所占比例以NE最高，AE最低。生境间的相似性可能是由于样地间和生境内植物间存在明显的变异或异质性，从而掩盖了生境间的差异。观察到的异质性和其他因素的重要性，如间隙和边缘的年龄，在研究的碎片上，可以被视为保护计划的重要问题。
Pollinators, especially insects, could be influenced by forest fragmentation. The aim of this paper was to examine whether there were differences in 1) the communities of floral visitors; 2) the frequency of visits; and 3) the fruit and seed sets of individuals of Psychotria tenuinervis occurring at anthropogenic edges (AEs), natural edges (NEs), and in the forest interior (FI) in 2 yr of study. In 2002, the total number of flower visits was greater in NE and lower in AE, while no difference among habitats was found in 2003. There were differences among sample plots, within habitats, in both years. Bees were the most frequent visitors of P. tenuinervis flowers, and the introduced honeybee Apis mellifera was the most common species observed. There were no differences in the fruit and seed sets, or in the density of reproductive individuals of P. tenuinervis among habitats. However, in 2002, NE showed the greatest proportion of fruits per flower and AE the smallest. The similarity among the habitats was probably due to the marked variation or heterogeneity among the sample plots and among the plants within the habitats, which may have masked any interhabitat differences. The observed heterogeneity and the likely importance of other factors, such as gaps and the age of the edge, on the fragment studied, could be viewed as important issues for conservation programs.