General Chemistry CEM 141
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This 2 page Class Notes was uploaded by Ladarius Rohan on Saturday September 19, 2015. The Class Notes belongs to CEM 141 at Michigan State University taught by Warren Beck in Fall. Since its upload, it has received 30 views. For similar materials see /class/207681/cem-141-michigan-state-university in Chemistry at Michigan State University.
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Date Created: 09/19/15
BS 110 lecture Model of population growth 1 exponential l genometric T passing time N population time 59 does exponential growth ever occur 1 Exponential growth occur but it always hit the maxlimit and stay in constant What happens when you introduce limit 1 Ca1rying capacity K 1 largest population size that a given habitat can support 1 resources availability 2 space availability 3 predators 2 reproductive patterns affect rates of population change 2 logistic population grth 1 dNdt rNkNK dNdt rNkNKwhen N is far below K KN K KK 1 growth is like exponential grth patter plenty of room to grow dNdt rNkNKWhen N is close to K KNKKKK0 2 no change in population size over time population size is stable or at equilibrium Approaching carrying capacity of habitat removal of resource in species very few individual in the population does not account for a decline of population seize Moved past carrying capacity of habitat does account for a decline of population size rselected vs k selected rselected 1 not resource limited 2 many off spring 3 high mortality 4 semelporous kselected 1 resource limited competition is key intra or interspeci c 2 iteroparous Density dependent 1 Regulation 1 situations where birth or death rates vary with increasing population 2 B BiIth D death 3 population size increase biIth rates often decline death rate often increase What might cause these kinds of patterns 1 Disease 2 predators attracted to the area 3 interaction with humans competition intraspecific l territoriality 7 if some min territory size popu size is also going to be limited and more resources allocated to defense therefore changing birth rates Disease 1 denser population more prone do disease outbreak thus death rate increase predation 1 increase as population becomes denser toxic byproducts l chemicals produced by organism build up to fatal level internal physiological switches l inhibit further growth or reproduction Dynamic over space 1 population size change di erently and in different rates in different habitats multiple habitats that can supp01t population of a given species Some have higher K than others Metapopulation 1 patterns of interactions between population of a species 59 Humans as a population Bu species don t eXist in isolation community ecology studies interactions between more than one species 2 How you quantify a community 1 Number of species species richness 2 amount of each species present relative abundance 3 richness abundance species diversity 3 What are some ways in which species can interact l Predator 2 competition 3 mutualisms 4 pasastism
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