Pollan, to reject predation as being a moral problem at all, stating "predation is not a matter of morality or politics; it, also, is a matter of symbiosis". Under Aldo Leopold's land ethic, native predators, as crucial components of biotic communities, are considered important to conserve. The environmental philosopher J. Baird Callicott asserts that the implication of animal rights theory, namely that we should protect animals from predators, would "[n]ot only [result in] the (humane) eradication of predators destroy the community, it would destroy the species which are the intended beneficiaries of this misplaced morality. Many prey species depend upon predators to optimize their populations." Holmes Rolston III views predation as an essential natural process and driver of evolution, that is a "sad good" to be respected and valued. Ty Raterman, an environmentalist, has argued that predation is something that can be lamented without implying that we have an obligation to prevent it. The environmental ethicist William Lynn has argued that from a welfare perspective predation "is necessary for the well-being of predators and prey" and essential for the maintenance of the integrity of the ecological communities. Larry Rasmussen, a Christian environmental ethicist, has argued that predation is "not a pattern of morality we praise and advocate". Other uses of the term "Predation problem" can also refer to the predation of animals who belong to species considered valuable to humans for economic reasons or conservation, such as domestic sheep predation by coyotes, farmed salmon predation by seals, the predation of animals who are hunted for sport or food and cat predation of wild animals; culling or removal of predatory animals may be carried out to reduce such incidents. See also Relationship between animal ethics and environmental ethics References Further reading Wild animal suffering Philosophical problems problem