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This Concept Map, created with IHMC CmapTools, has information related to: Population Growth Ch. 11, when resources become limited populations exhibit "logistic" growth, the graphs of populations experiencing these two types of growth can look very similar for example geometric vs. exponential growth, Global Warming (abiotic) for example northern bird & moose populations because vegetation they feed on blooms to early, population growth of "0" illustrated by the plateau on the graph (after either exponential or geometric growth phase) at which point the population has reached "K" = "carrying capacity" = population size that the environment can support, Pulsed / discrete reproduction (all individuals are reproducing at the same time) for example Phlox (annual plant), resource abundance (or lack thereof) such that when resources are abundant (unlimited) & population density is low, geometrically involving Pulsed / discrete reproduction (all individuals are reproducing at the same time), competition (biotic factor) for example higher levels of competition seen with higher density of barnacles, density-independent factors (which are not affected by population size) including Natural disasters (abiotic), Global Warming (abiotic) for example polar bear population declines due to lack of ice sheets (to hunt from), Natural disasters (abiotic) For example Hurricane (Hurricane Sandy), density-independent factors (which are not affected by population size) including disease (biotic factor), "logistic" growth for which immigration and emigration are equal (Dr. Mostrom's addition), when resources are abundant (unlimited) & population density is low populations can grow exponentially, Population Growth is dependent on resource abundance (or lack thereof), when resources are abundant (unlimited) & population density is low for example when there are seasonal ("pulsed") increases in nutrients and light (for geometric growth only), birthrates and death rates are equal (textbook) which leads to population growth of "0" illustrated by the plateau on the graph (after either exponential or geometric growth phase), geographic space (abiotic factor) for example barnacles on rocks (the fewer the barnacles, the more space any individual can exploit), the population's "r" (per capita rate of increase) (with generation time "T" accounted for) is usually lower tha the potential "r max", immigration and emigration are equal (Dr. Mostrom's addition) which leads to population growth of "0" illustrated by the plateau on the graph (after either exponential or geometric growth phase)