Incorporating patterns of disperser behaviour into models of seed dispersal and its effects on estimated dispersal curves

摘要: The processes determining where seeds fall relative to their parent plant influence the spatial structure and dynamics of populations communities. For animal dispersed species factors influencing seed shadows are poorly understood. In this paper we test hypothesis that daily temporal distribution disperser behaviours, for example, foraging movement, influences dispersal outcomes, in particular shape scale curves. To do this, describe frugivory curves produced by southern cassowary, Casuarius casuarius, only large-bodied Australia’s rainforests. We found C. casuarius consumed fruits 238 all fleshy-fruit types. feeding trials, 11 were retained on average 309 min (±256 SD). Sampling radio-telemetry data randomly, is, assuming occurs at random times during day, gives an estimated distance 239 m (±207 SD) casuarius. Approximately 4% further than 1,000 m. However, observation wild birds indicated movement occur more frequently early late day. Seeds day receive distances 1.4 ‘random’ estimate, while afternoon received mean 0.46 estimate. according 337 (±194 Most animals’ behaviour has a non-random distribution. Consequently such effects should be common need incorporated into shadow estimation. Our results point being emergent property plant–disperser interaction rather or species.