ecology Flashcards
(53 cards)
carrying capacity
the max population size the environment can support
interspecific competition occurs
between species
commensalism
one species benefits while the other is not affected
The entire set of conditions under which an animal (population, species) can survive and reproduce itself is called:
fundamental niche
types of dispersion in population
clumped, evenly spread out, random
survivorship
number of individuals in a given population of each life stage
t1 survivorship curve
high survival in early life
t2 survivorship curve
constant risk of death
t3 survivorship curve
high morality in early life
population regulation
factors and processes that control the size and growth of population
density independent
affects population regardless of how many there is
density dependent
as population increases, factors become stonger and negatives become stonger
types of change in population size
exponential growth and logistic growth model
exponential growth
increase under ideal conditions
what curve does exponential growth have
j shaped
logistic growth model
realistic model as it incorporates carrying capacity
what is r and k selection
strategies used by organisms to reproduce and survive
what does r selection do
maximises reproduction but invests little in eachother
what does k selection do
invests more in fewer offsprings
biosphere
parth of earth where life occurs, made up of biomes
what are features of the cold and hot deserts
low precipitation, little to no vegetation
what are the layers of tropical forests (highest to lowest)
emergent, canopy, understory, forest floor
why do boreal forests/taiga have cone shaped trees
to prevent snow buildup
what does the tundra have in its ground
permafrost
