bis2b midterm 1

x

age in years

Nx

number of individuals

Nxoff

number of offspring

Ix

survivorship

mx

fecundity (average number of offspring an individual will produce during an age class)

lxmx

average number of offspring in an age gap (likelihood of reproducing)

R0

net reproductive rate (average an individual produces in a lifetime)

G

generation time (average age of parents across all offspring produced)

r

population growth rate (average number of offspring produced in a lifetime)

K

environmental carrying capacity

classification

kingdom, phylum, class, order, family, genus, species

species richness

total number of species present

species eveness

relative abundance of each species

K selected traits

longer lifespans, produce few large offspring, large body size

r selected traits

shorter lifespans, produce many small offspring, small body size

fundamental niche

abiotic condition where species can reproduce and survive

realized niche

biotic condition where species can survive and reproduce

acclimation

change in phenotype; short term; within an individual

adaption

change in genotype; long term; across generations

mycorrhizae

partner with any plant; shares anything the the plant needs

mycorrhizae and rhizobia

heterotrophic; partner with autotrophic plant; obtain sugar

rhizobia

legumes partner plants; shares nitrogen with plant

optimal foraging theory

maximizing energy benefit