Characteristics of a population Survivorship
Species- a group of organisms with similar characteristics and which are able
> habitat R strategy: many offspring, low chance of
to interbreed and produce fertile offspring
> distribution: uniform, random, clustered survival, no parental care
Population- a group of organisms of the same species, inhabiting a particular
> ecological niche- position and role of a species K strategy: few offspring, high chance of
area, in such proximity that interbreeding can occur, eg goldfish in a pond
> population density survival, a lot of parental care
Community- populations of different species, living in the same habitat, eg,
> reproductive potential
buck, lion and elephant
> population structure: male vs. females, young vs.old
Population parameters
Natality: no. of births
Succession Mortality: no. of deaths
A living organism in any ecosystem is rarely ever static, Immigration: movement into a new area
but change gradually over time Emigration: movement out of their area without
1. Simple plant community (pioneer community) the possibility of returning
2. More complex plants (climax community) which
remains stable as long as abiotic factors do not
Types of populations
change
Closed: no individuals can enter or leave
> primary terrestrial succession Open: individuals can enter or leave
> secondary terrestrial succession of
Estimation of population size
Direct technique: census, counting the animals
Indirect techniques: sampling, using quadrants
Population regulation ear 104ey e danas po teamoy aitre
> carrying capacity: vals adwee po ·ae
optimum number of
Social organisation Mark-recapture: marking and capturing a
Competition organisms that can be
> dominance- leading the group number of animals and releasing them, later
Interspecific: members supported recapturing
> territoriality- defend your occupational of a different species > density-independent: locaidy spivo witiene parates staina
area
y
natural disasters, climate
sonivo paiom banybara
> living in large groups- better sense of Intraspecific: members change
danger, protect the young of the same species > density-dependent: affect Graphs of population growth
> division of labour > competitive exclusion when density is high, but
> resource partitioning not when low Geometric: typically followed by a
Logistic: new area with favorable
conditions decrease
Interactions that affect population size
Competition Predation
- %
Individuals of a
population living close
together
·
Species- a group of organisms with similar characteristics and which are able
> habitat R strategy: many offspring, low chance of
to interbreed and produce fertile offspring
> distribution: uniform, random, clustered survival, no parental care
Population- a group of organisms of the same species, inhabiting a particular
> ecological niche- position and role of a species K strategy: few offspring, high chance of
area, in such proximity that interbreeding can occur, eg goldfish in a pond
> population density survival, a lot of parental care
Community- populations of different species, living in the same habitat, eg,
> reproductive potential
buck, lion and elephant
> population structure: male vs. females, young vs.old
Population parameters
Natality: no. of births
Succession Mortality: no. of deaths
A living organism in any ecosystem is rarely ever static, Immigration: movement into a new area
but change gradually over time Emigration: movement out of their area without
1. Simple plant community (pioneer community) the possibility of returning
2. More complex plants (climax community) which
remains stable as long as abiotic factors do not
Types of populations
change
Closed: no individuals can enter or leave
> primary terrestrial succession Open: individuals can enter or leave
> secondary terrestrial succession of
Estimation of population size
Direct technique: census, counting the animals
Indirect techniques: sampling, using quadrants
Population regulation ear 104ey e danas po teamoy aitre
> carrying capacity: vals adwee po ·ae
optimum number of
Social organisation Mark-recapture: marking and capturing a
Competition organisms that can be
> dominance- leading the group number of animals and releasing them, later
Interspecific: members supported recapturing
> territoriality- defend your occupational of a different species > density-independent: locaidy spivo witiene parates staina
area
y
natural disasters, climate
sonivo paiom banybara
> living in large groups- better sense of Intraspecific: members change
danger, protect the young of the same species > density-dependent: affect Graphs of population growth
> division of labour > competitive exclusion when density is high, but
> resource partitioning not when low Geometric: typically followed by a
Logistic: new area with favorable
conditions decrease
Interactions that affect population size
Competition Predation
- %
Individuals of a
population living close
together
·
