Download Chapter 14 Questions 14.1 1. Three parts of a niche include food

 Chapter 14 Questions 14.1 1.
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Three parts of a niche include food type, abiotic conditions, and behavior. One species will be better suited to the nice and the other species will either be pushed into
another niche or become extinct. As ecological equivalents, they share a similar niche. The population better suited to the niche might deprive the other of resources, causing the other to die off. Or one population might respond to limited resources by altering its niche. The bears are fighting among themselves, so it is considered intraspecific competition. Mutualism, commensalism, and parasitism. Predation and parasitism are both relationships in which one organism benefits while the other is harmed. In predation, the predator needs to kill its prey in order to benefit. In parasitism, the parasite benefits by keeping the host alive. No, population density simply describes the number of individuals per unit area, not the dispersion pattern. Three dispersion diagrams: clumped, uniform and random (see “Visual Vocab” on p.411) Survivorship curves help to describe the reproductive strategy of a species. If the curve shows a low level of infant mortality, the parents probably care for their young. If it shows a very high level, the organisms likely have a high birth rate and provide little or no parental care. Immigration, births, deaths, and emigration. Carrying capacity limits the size of a population. A density­dependent limiting factor is affected by the number of individuals in a given area, but a density­independent limiting factor is not affected by population size. Density­dependent examples include predation, competition and disease. Density­independent examples include weather, natural disasters, and human activities. Primary succession begins with bare rock, worn down and colonized by pioneer species. Secondary succession begins with established soil in which many different plants can grow.
Pioneer species, such as mosses and lichens, can break down rock into smaller pieces. When they die, their remains mix with tiny pieces of rock to form a thin layer of soil. They change the ecosystem in ways that enable the support of more diverse species.