BIOL 1001 Learning Outcomes Final.docx

O carrying capacity is not static because depending

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o Carrying capacity is not static because depending on the conditions present, there may be more room or less room for a population to grow. For example, if a landmass were to break into segregated islands, there would be less space for a population to flourish, thus lowering the carrying capacity. If more food was added in a geographic area, the carrying capacity could increase. Carrying capcity is not the same for all species living in a geographic area because species vary in the way they occupy their environment. One species may be larger than the other, and would thus have a lower carrying capacity because there is less space for them to flourish. Humans can impact carrying capacity for themselves and other species by removing or adding resources to an area, or taking up more space for human purposes, which would cause another species to have less space. Density-independent factors are factors that limit the growth of a population for reasons independent of population size and density. Factors include abiotic factors such as a hurricane or forest fire. Density-dependent factors are factors that limit the growth a population due to the
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population having an increasing population density. Density-dependent factors may include availability of food, water, and space. Intrinsic vs Extrinsic control? o K-selected populations will have low mortality rates, reproduce multiple times, have low amounts of offspring after each birth, will have large-sized offspring, and extensive parental care o r-selected populations will have high mortality rates, reproduce usually once, have high amounts of offspring with their birth, will have small-sized offspring, and little to no parental care Maximum sustainable yield is the maximal amount of a resource can be exploited so that it does not deplete significantly over time. The challenge to this is finding alternative ways to suit human needs. In addition, it is a challenge to find ways in which humans can live off the resources that are being produced continuously on earth over mining resources. Species at risk of extinction tend to contain low diversity, suffer from habitat loss, and are segregated into many metapopulations. Ex situ conservation is when species are extinct in the wild and are found living only in captivity. J: Interspecific Species interactions: competition (-/-), commenalism (0/+), mutualism (+/+), parasitism (-/+). Competition is bad for all species competing even though one emerges victorious because when two species are competing, not all of them are obtaining the full potential of resources because other species are using up some of these resources. Eventually one species will outcompete the other, but both will have already suffered not getting as many resources as they could had there been no competition. o Competition can lead to one species going extinct in a particular area Commenalism will increase the number of benefiting species while the numbers of species that are neutral will not be affected.
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