Preservation: protection of an ecosystem from human interference, so that it remains in its original state. Conservation: involves sustainable development. c) conservation: active management of an ecosystem. We have a moral duty for future generations to conserve the wide variety of existing ecosystems. Ethical: many believe that we shouldn't have the right to decide which organisms live or die. Social: many enjoy the natural beauty of wild ecosystems as well as using them for activities which are beneficial to health by providing a means of relaxation and exercise. Eg, rainforest species provide medicinal drugs, so they must be conserved. b) economic: to provide resources that humans need to survive and to provide income.

More prey organisms survive and reproduce, increasing the prey population, causing the cycle to start again.ĩ) a) economic, ethical and social. d) the second incline of the prey curve: reduced predator numbers results in less of the prey population being killed. Interspecific competition between different species of predator that feed on the same prey increases, resulting in a decrease in the size of the predator population. c) the first decline of the predator curve: the reduced prey population can no longer support the predator population. The death rate of the prey population is greater than its birth rate, so the prey population falls. b) the first decline of the prey curve: the increased predator population eats more prey, causing a decline in the prey population. This, in turn, results in an increase in the predator population. b) a) the first incline of the predator curve: an increase in prey population provides more food for the predators, allowing more to survive and reproduce. Insect Biochemistry and Molecular Biology, 37, 1189–1197.2) a) predator populations are always smaller than prey populations. Intimate roles for cyanogenic glucosides in the life cycle of Zygaena filipendulae (Lepidoptera, Zygaenidae). Annual Review of Entomology, 40, 269–295. The ecology, behavior, and evolution of periodical cicadas. Adaptive plasticity in hatching age: A response to predation risk trade-offs. Antipredatory function of head shape for vipers and their mimics. Deimatism: a neglected component of antipredator defence. An exposition of the laws of disguise through color and pattern. Concealing coloration in the animal kingdom. Philosophical Transactions of the Royal Society B, 364, 423–427.

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Predator vs prey def