Populations to Communities Flashcards
population
individuals respind to surrounding environent based on availibility of critical resources
3 ways to determine age
calcified structures
length frequency distribution
Direct observations
Direct observations (determining age)
mark & recapture individuals over time
length frequency distribution (determining age)
measure large # of individuals
Have to assume length is same for fish at certian age
Fish x always same age
Calcified structures (determining age)
Marks that develop bc differences in metabolic activity and growth
summer light winter dark
annual dailt
How do scales relate to determining growth
W increases as cubic function of L for scales
what influences a population growth
abundance and time
carrying capacity
environmental restraint
Assumptions with mark recapture
no mortality other than natural
no emmigration or immagration
no marks missed
random pop
Reproductive allocation
Gonadsomatic index
gonad W/ body W x100
reproduction is directly based on and influenced by…
recruitment
Communites
collection of species found in a specific area
community ecology
patterns and processes structureing a collection of species
species richness
total number of species present
Species diversity
measures species richness and relative abundance
Guilds
collection of species that use similar resources in similar ways
