Effects of habitat fragmentation on provisioning rates, diet and breeding success in two species of tit (great tit and blue tit)
Effects of habitat fragmentation on provisioning rates, diet and breeding success in two species of tit (great tit and blue tit)
复制标题
栖息地破碎化对两种山雀（大山雀和蓝山雀）的供给率、饮食和繁殖成功率的影响
DOI：
10.1007/s004420050476
复制
发表时间：
1998
期刊：
影响因子：
2.7
通讯作者：
A. Dhondt
中科院分区：
文献类型：
--
作者：
N. Nour;D. Currie;E. Matthysen;R. Van Damme;A. Dhondt
摘要本研究的目的是探讨森林片断化对亲鸟为幼鸟提供充足食物供应能力的影响。研究大山雀（Parus major L.）蓝山雀（P.caeruleusL.）在不同的森林大小类的研究领域之间的变化，我们比较了供应率和小鸡饮食和相关的这些参数的繁殖成功。我们拍摄了217个巢在两个繁殖季节，并收集了数据的粪便下降作为一般估计的毛虫可用性。在拍摄期间没有父母或只有一个父母参与的巢（n = 46）被排除在分析之外。在这两年和两个物种的摄食率最高的最小的片段和最低的大森林。还有人认为，不同地区之间的喂养率差异在不同年份之间有所不同。我们没有发现一致的趋势，猎物的大小与森林的大小变化，虽然这两个物种带来了略小的猎物项目的巢在最小的森林片段和摄食率与猎物的大小呈负相关。在这两个物种中，毛虫是雏鸟的主要食物。我们没有发现任何证据表明，无论是粪便下降或在饮食中的毛虫的比例随森林的大小。也没有相关性之间的平均粪便下降和总数的毛毛虫带来的巢，在这两个物种。繁殖成功，作为衡量的窝卵数，育雏大小，羽翼丰满的重量和羽翼丰满的成功，没有不同的小片段和大森林，在这两个物种。也没有供应率之间的关系（如关注量的猎物喂给雏鸟和小鸡饮食的质量）和繁殖成功的参数。总之，这项研究并不表明次优的觅食或繁殖条件下，在小片段相比，附近的大森林，无论是物种。
Abstract The aim of this study was to examine the effects of forest fragmentation on the ability of parent birds to provide their young with an adequate food supply. To examine whether prey population densities of the great tit (Parus major L.) and the blue tit (P. caeruleus L.) vary between study areas in different forest size classes we compared provisioning rates and chick diet and related these parameters to breeding success. We filmed 217 nests over two breeding seasons and collected data on frass fall as a general estimate of caterpillar availability. Nests which were attended by none or one parent only during filming (n = 46) were excluded from the analyses. In both years and for both species feeding rates were highest in the smallest fragments and lowest in the large forest. There was also a suggestion that differences in feeding rates between areas vary between years. We found no consistent tendency for prey size to change with forest size, although both species brought slightly smaller prey items to the nest in the smallest forest fragments and feeding rates correlated negatively with prey size. Caterpillars were the main item fed to nestlings, in both species. We found no evidence to suggest that either frass fall or the proportion of caterpillars in the diet varied with forest size. There was also no correlation between mean frass fall and the total number of caterpillars brought to the nests, in either species. Breeding success, as measured by clutch size, brood size, fledging weight and fledging success, did not differ between the small fragments and the large forest, in either species. There was also no relationship between provisioning rate (as concerns volume of prey fed to nestlings and the quality of chick diet) and breeding success parameters. In conclusion, this study does not suggest suboptimal foraging or breeding conditions in small fragments compared to a nearby large forest, for either species.