BIO 2129 Lecture Notes - Lecture 8: Thrips, Vanessa Atalanta, Biological Interaction
18 Oct 2016
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8 - from abundance to population growth models. Population density varies through time and across spatial gradients. Black-capped chickadee fluctuating through time and on map. What geographical area is the chickadee better suited to live in (forested environments, not plains) Water availability, soil nutrient capacity, salt water vs fresh water. N = f(environmental conditions), function of environmental conditions, environmental factors like. Nt = nt-1 + birth - mortality + immigration - emigration. To estimate temporal variation of constituent species in a community. Immigration = emigration = 0; so nt = nt-1 + birth - mortality. Time not continuous to sub divide, time is unit eg. it takes species two years to breed, unit is 2 years. Alpha = geometric rate of growth, discrete breeding period. Red admiral butterfly and echinacea flower, breeding season r = reproduce at any given time, same things but different kinds of species. K = total number of individuals an environment can support of one species.
