西双版纳热带森林中原生林与次生林内鸟类对不同颜色果实的选择

果实颜色是影响食果动物取食行为的重要因素之一,同时也影响植物的种子传播.试验地点位于西双版纳野象谷自然保护区和补蚌自然保护区,在每个自然保护区内选取原生林和次生林各1处,使用红、橙、黑、蓝4种颜色的人工果实来研究鸟类对不同颜色果实的选择.试验发现,不同颜色果实在原生林中被取食的程度有显著差异,而在次生林中不存在显著差异.与以往研究结果不同,鸟类对蓝色和橙色果实的选择较为突出,而黑色果实在2处生境中的被取食均较少.

Fruit color preferences of birds in Xishuangbanna tropical primary forests and secondary

Fruit color is an important factor that influences the removal of fruits and subsequent seed dispersal,but to date,there is no definite conclusion on the color preference of birds.In additional,studies regarding habitat effect on the removal of fruit with different colors are lacking.To investigate the problem,2 different habitats were chosen:primary forest and secondary forest.To test color preference within these microsites,we placed different colored artificial fruits and counted fruit removal.During the study period,blue and yellow fruits were statistically more pecked than black and red fruits in primary forest in Mengla reserve.Red and yellow fruits were statistically more pecked than blue and black fruits in primary forest in Wild Elephant Valley reserve.However,there was no statistically difference between different color fruits in secondary forests in two reserves.