ECOSYSTEMS (relationships and competition for limiting factors )

Ecosystems…  Include all the different organisms living in a certain area and the physical environment

Ecosystems… Do not have clear boundaries between them… organisms move from one ecosystem to another

ORGANISM: one individual living thing ONE red zebra fish

SPECIES- Group of organisms able to reproduce fertile offspring that resemble each other all red zebra fish

POPULATION: group of individuals of the same species living in the same area all red zebra fish living in Bobcat Lake

COMMUNITY: group of interacting populations of different species in the same area all red zebra fish, snails, seaweed, and purple fish living in Bobcat Lake

ECOSYSTEM: a community and the abiotic factors that affect it

PRODUCERS Form the base of all ecosystems Organisms that make their own food (by photosynthesis)

CONSUMERS Depend on producers for survival Organisms that eat producers or other consumers PRIMARY- eat producers SECONDARY- eat other consumers

PRIMARY CONSUMERS

SECONDARY CONSUMERS

Organisms that digest producers and consumers when they die DECOMPOSERS & SCAVENGERS

DECOMPOSERS- organisms that break down dead organisms & release nutrients back into the ecosystem

SCAVENGERS- animals that eat organisms killed by a predator- vultures and opossums

HABITAT- The actual place where an organism lives NICHE- An organism’s way of life, all the things it does to survive

HABITAT- The actual place where an organism lives Which populations share the same habitat? Niche?

Food webs show the interaction of all the types of organisms in an environment. show how energy flows in an ecosystem

Ecosystems are made up of…. ABIOTIC FACTORS- nonliving parts of the ecosystem BIOTIC FACTORS- living parts of the ecosystem

Organisms need certain biotic and abiotic factors for survival. These flowers need abiotic factors of water, sunlight and the right temperature to grow DEPENDENCE

COMPETITION Relationship between species in which they attempt to use the same biotic or abiotic factor 2 plants on the forest floor competing for sunlight Hyena and lion fight over the same animal carcass

HABITAT- The actual place where an organism lives How might the hyena and the cheetah compete for a biotic factor? How might the primary consumers compete for an abiotic factor in the African grassland?

PREDATION One organism kills and eats another PREY- one that is eaten PREDATOR- one that does the eating

Can you name a predator-prey in the food web?

PARASITISM Organisms that live in or on another organism and feed on it without immediately killing it The parasite takes its nourishment from the host.

Can you name a predator-prey? How do the fox and hawk compete? Can you name the abiotic factors? Can you name the biotic factors? Can you name a producer- consumer?

Fish eating algae off a sea turtle shell provides food for fish while cleaning the turtle shell MUTUALISM Cooperative partnership between two species. BOTH SPECIES BENEFIT!

Relationship in which one species is helped and the other is neither helped nor harmed COMMENSALISM Remoras and Sharks: remoras attach themselves to sharks & feed on scraps of food left over from the shark’s meals