Ecological Consequences of Foraging Mode

摘要: Desert lizards are typically either widely foraging or sit-and-wait predators, and these modes correlated with major differences in ecology. Foraging mode is related to the type of prey eaten by lizards. Widely Kalahari desert, Western Australian North American desert generally eat more that sedentary, unpredictably distributed, clumped (e.g., termites) large inaccessible (inactive scorpions) than do sit-and- wait In contrast, active. also appears influence types predators turn For example, a snake eats predominately Crossovers thus exist between trophic levels. may encounter frequently, as suggested analyses relative tail lengths; but break frequencies ambiguous. Daily maintenance energetic expen- ditures appear be about 1.3-1.5 times greater those same habitats, gross food gains 1.3-2.1 greater. species have lower clutch volumes, apparently response enhanced risks predation. within one varies changes availability. Physiology, morphology, risk predation might restrict flexibility mode. Because constrains numerous important aspects ecology, any general model velocity must complex.