Dolman Paul M
School of Biological Sciences, University of East Anglia, NR4 7TJ, Norwich, UK.
Oecologia. 1995 Jun;102(4):511-514. doi: 10.1007/BF00341364.
Intake rates of snow buntings feeding on artificial seed patches were measured at different bird densities, for each of two different seed densities. Interference occurred in the low seed-density treatment, with intake rates declining at high bird densities. However, interference was not found in the high seeddensity treatment. The finding that the strength of interference may depend on resource density contradicts the hypothesis that the functional response is ratio-dependent (Arditi and Akçakaya 1990). The formulation for interference from Hassell and Varley (1969), and the models of Beddington (1975), Ruxton et al. (1992) and Holmgren (1995), also assume that the strength of interference is independent of resource density. The development of behaviour-based models that consider the relation between the intensity of interference, resource density and individual state may provide a more accurate description of the process of interference.
在两种不同种子密度下，分别测量了以人工种子斑块为食的雪鹀在不同鸟类密度时的取食率。在低种子密度处理中出现了干扰现象，即取食率在高鸟类密度时下降。然而，在高种子密度处理中未发现干扰。干扰强度可能取决于资源密度这一发现与功能反应是比率依赖的假设相矛盾（阿尔迪蒂和阿克恰卡亚，1990年）。哈塞尔和瓦利（1969年）提出的干扰公式，以及贝丁顿（1975年）、鲁克斯顿等人（1992年）和霍尔姆格伦（1995年）的模型，也都假定干扰强度与资源密度无关。开发考虑干扰强度、资源密度和个体状态之间关系的基于行为的模型，可能会对干扰过程提供更准确的描述。
