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Biodiversity
Lecture 36
24
Biology
Undergraduate 1
05/06/2011

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Term
human populations
Definition
___ follow ecological principles just like any other animal
Term
demography
Definition
___ is the study of a population's births, deaths, and changes over time
Term
survivorship curve
Definition
A ___ is a graphic way of presenting the data from demography
Term
Belding's ground squirrels
Definition
The survivorship curve for ___ shows that the death rate is relatively constant
Term
exponental
Definition
___ population growth is population increase under ideal conditions
Term
exponental population growth
Definition
under these conditions, the rate of reproduction is the highest.
Term
growth rate
Definition
A population's ___ equals birth rate minus death rate
Term
J-shaped curve of exponential growth
Definition
The ___ is characteristic of some populations that are rebounding
Term
carrying capacity
Definition
realistic population projections limit growth by incorporating ___.
Term
carrying capacity (K)
Definition
___ is the maximum population size the environment can support.
Term
K-selection (density dependent selection)
Definition
___ selects for life history traits that are sensitive to population density
Term
r-selection (density-independent selection)
Definition
___ selects for life history traits that maximize reproduction
Term
song sparrow
Definition
Clutch size int eh ___ decreases as density increases and food is in short supply
Term
territoriality
Definition
in many animals, ___ may limit density
Term
Cheetahs
Definition
___ are highly territorial, usihg chemical communication to warn other cheetahs of their boundaries.
Term
oceanic birds
Definition
___ exhibit territoriality while nesting. THis disperses them uniformly
Term
feed preferentially on that species
Definition
As a prey population builds up, predators may ___.
Term
toxic wastes
Definition
The accumulation of ___ can contribute to density-dependent regulation of population size
Term
invertebrates
Definition
Extreme fluctuations in population size are more common in ___ than in large mammals
Term
metapopulations
Definition
___ are groups of populations linked by immigration and emigration.
Term
high immigration; higher survival
Definition
___ combined with ___ can produce greater stability in population size.
Term
demographic transition
Definition
the ___ is the move from first toward second state (high birth rates and death rates to low birth rates and death rates)
Term
relative wealth and education
Definition
the demographic transition is associated with factors like ___ and ___.
Term
how many resources we consume
Definition
How many humans the biosphere can support depends on ___.
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