2.1 (10-13) Population Growth Patterns/S and J shaped curves/limiting factors скачать в хорошем качестве

2.1 (10-13) Population Growth Patterns/S and J shaped curves/limiting factors

This old video remains relevant to ESS Guide for 2026. 2.1.10 Carrying capacity is the maximum size of a population determined by competition for limited resources. Include examples of resources that may affect carrying capacity, including biotic and abiotic factors. 5.2, 8.2 2.1.11 Population size is regulated by density-dependent factors and negative feedback mechanisms. Density-independent factors may have significant influence on population size, but it is the density- dependent factors that tend to regulate the population around the carrying capacity. In addition to competition for limited resources, include the increased risk of predation and the transfer of pathogens in dense populations. These are examples of negative feedback returning a population to equilibrium. 2.1.12 Population growth can either be exponential or limited by carrying capacity. If there are no limiting factors, population growth follows a J-curve (exponential growth). When density-dependent limiting factors start to operate, the curve becomes S-shaped. Consider population growth curves in terms of numbers of individuals and rates of change, and populations showing an S-curve and a “boom and bust” pattern, for example, reindeer on St Matthew Island. 5.2, 8.2 2.1.13 Limiting factors on the growth of human populations have increasingly been eliminated, resulting in consequences for sustainability of ecosystems. Include the effects of elimination of natural predators, technological advances, and degradation of the environment.