Relationships Within Ecosystems NOTES

Habitat - is the _____ where an organism lives

A shark's habitat:

Niche -

Niche for a shark:

Niche:

1.

2.

3.

4.

Can 2 different species live in the same habitat? (like birds in a tree)

But can 2 different species DO the same thing? (like birds eat the same worm)

This is because every species has their own set of ____________ in a niche.

When 2 species are in the same niche, they need the same _______.

So they _______ (fight) with each other.

Whoever has the best ___________, will exist in that niche.

The other species either finds a new niche or .. uh.. goes extinct.

Competitive exclusion - when forced to compete, one species _______ the other(s)

_______ species invades and competitively excludes native species

What is an example of an invasive species?

Which grassy reed is native to our Meadowlands?

When species compete, they can:

Make the other ________ away

Make the other go _______

or _____ with the other

Ex - bats and dragonflies both eat mosquitoes in their same niche, but:

(select 2)

PREDATION - when predator eats/hunts the ________

If the # of prey (zebras) goes up, the # of predators (lions) goes ____

If the # of predators (lions) goes up, the # of prey (zebra) goes ____

If the # of prey (zebra) goes down, the # of predators (lions) goes ____

If the # of predators (lions) goes down, the # of prey (zebra) goes back ____

BOOM-BUST CYCLE:

What do you call a species that can REALLY affect the boom-bust cycle in its ecosystem?

a ______ species - a KEY organism that makes an ecosystem work,

ex. - beaver, prairie dogs, wolves

MIMICRY - Look, sound or act like a more _______ SPECIES

example of mimicry:

WARNING COLORATION - Has bright colors or patterns to ______ predators

example of WARNING COLORATION:

CAMOUFLAGE - looks or acts like its _________

example of CAMOUFLAGE:

REVIEW: Which is NOT part of an organism's niche?

REVIEW: A snake eating a mouse and a frog eating a fly are examples of:

REVIEW: A caterpillar disguised as a bird poop on the ground is an example of which defensive adaptation?

REVIEW: What is the whole point of a boom-bust cycle in an ecosystem?

REVIEW: If the # of predators decrease, why do the # of prey increase?