The Sonoran desert 4.1
Name the two producers of a food web in the Sonoran desert
Prickly pear cactus and brittlebrush,
What is a rice paddy ecosystem?
A rice paddy ecosystem is a man made wetland where rice is grown in flooded fields and supports various living organisms.
in your own words explain what a native species is
A native species is an organism that naturally lives and evolved in a particular area without being introduced by humans
What was DDT used for?
To kill insects that transmitted diseases
Explain why the food web could not exist without the producers
Producers are essential because they supply the energy that supports all life in the food web
Why are rice paddies flooded with water?
Rice paddies are flooded to help rice grow well and to reduce weeds and pests.
Name some native species in your own Canada
moose, beaver, Canada goose, snowshoe hare, gray wolf, and maple trees
What other organism did DDT harm
Animals
what do the arrows in the food web repersent
The arrows in a food web represent the direction of energy flowshowing which organism is eaten by another
Which organisms live in a rice paddy?
Organisms in a rice paddy include rice plants, fish, frogs, insects, and birds.
Suggest why it is very difficult to eradicate an introduced species once it has settled into a new place
Because they multiply rapidly
What did DDT do to birds
It made the birds eggs shells fragile and easy to break
Give two examples of interactions between organisms in the desert that are not to do with feeding
Competition, mutualism
How do farmers affect the rice paddy ecosystem?
Farmers affect the rice paddy ecosystem by controlling water levels, adding fertilizers, and managing pests, which changes how plants and animals live there
what is a animal that is in an ecosystem where it doesn’t belong
Stoats
What is bioaccumulation
DDT in an organism that accumulates overtime
Explain the difference between an ecosystem and habitat
A habitat is a place where an organism lives an ecosystem is the network of a interactions between all the living organisms and the non living things around them
What habitats can be found within a rice paddy?
A rice paddy can include habitats such as shallow flooded water, muddy soil, and grassy field edges, each supporting different organisms
name 2 invasive species
Stoats Rabbits
why is the concentration of DDT in a cormorant greater than in a minnow.
Since it eats many minnows, causing toxins to build up through biomagnification.