Ecosystems
Published on Nov 21, 2015
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PRESENTATION OUTLINE
PRODUCER
A PRODUCER IS A ORGANISM THAT MAKES ITS OWN FOOD.
Consumer: person who purchases goods and services for personal use.
Decomposer
an organism, especially a soil bacterium, fungus, or invertebrate, that decomposes organic material.
Photo by Dave Paterson
An ecosystem includes all of the living things plants, animals and organisms in a given area, interacting with each other, and also with their non-living environments weather, earth, sun, soil, climate, atmospher.
Photo by Billy Wilson Photography
In an ecosystem, each organism has its' own niche, or role to play.
Consider a small puddle at the back of your home. In it, you may find all sorts of living things, from micro organisms, to insects and plants. These may depend on non-living things like water, sunlight, in the puddle, temperature, atmospheric pressure and even nutrients in the water for life.
Photo by epSos.de
Decomposer
Decomposers are the last stop on the food chain, they eat the things no one else wants to. Decomposers many times eat dead things from the ground in order to get nutrients. The dead things that are eaten by decomposers are called detritus which means "garbage". Some of the most common decomposers are bacteria, worms, slugs, snails, and fungi like mushrooms.
Photo by ressaure
Consumer
Consumers: any organism that can’t make its own food
Consumers have to feed on producers or other consumers to survive. Deer are herbivores, which means that they only eat plants (Producers). Bears are another example of consumers. Black bears are omnivores and scavengers, like skunks and raccoons, which means that they will eat just about anything. In a forest community, Black Bears will eat blueberries, bugs, acorns, and many kinds of nuts.
Photo by USDAgov
Decomposer
Decomposers are organisms that break down dead or decaying organisms, and in doing so, carry out the natural process of decomposition. Like herbivores and predators, decomposers are heterotrophic, meaning that they use organic substrates to get their energy, carbon and nutrients for growth and development.
Photo by Cargol
Everything in the natural world is connected. An ecosystem is a community of living and non-living things that work together. Ecosystems have no particular size. An ecosystem can be as large as a desert or a lake or as small as a tree or a puddle. If you have a terrarium, that is an artificial ecosystem. The water, temperature, plants, animals, air, light and soil all work together. If there isn't enough light or water or if the soil doesn't have the right nutrients, the plants will die. If the plants die, animals that depend on them will die. If the animals that depend on the plants die, any animals that depend on those animals will die. Ecosystems in nature work the same way. All the parts work together to make a balanced system
Photo by Pan.101
Abiotic Factors
Abiotic factors are those non-living physical and chemical factors which affect the ability of organisms to survive and reproduce.
Abiotic factors vary in the environment and determining the types and numbers of organisms that exist in that environment. Factors which determine the types and numbers of organisms of a species in an ecosystem are called limiting factors. Many limiting factors restrict the growth of populations in nature.
Photo by uccsbiology
Biotic factors
There was only one problem: long strings ran through the length of the stalk, and they got caught in my teeth. When I help my mother in the kitchen, I always pull the strings out before slicing celery.
I pulled the strings out of my stalk. Z-z-zip, z-z-zip. My brother followed suit. Z-z-zip, z-z-zip. To my left, my parents were taking care of their own stalks. Z-z-zip, z-z-zip, z-z-zip.
Suddenly I realized that there was dead silence except for our zipping. Looking up, I saw that the eyes of everyone in the room were on our family. Mr. and Mrs. Gleason, their daughter Meg, who was my friend, and their neighbors the Badels—they were all staring at us as we busily pulled the strings off our celery.
That wasn’t the end of it. Mrs. Gleason announced that dinner was served and invited us to the dining table. It was lavishly covered with platters of food, but we couldn’t see any chairs around the table. So we helpfully carried over some dining chairs and sat down. All the other guests just stood there. Mrs. Gleason bent down and whispered to us, “This is a buffet dinner. You help yourselves to some food and eat it in the living
room.”Our family beat a retreat back to the sofa as if chased by enemy soldiers. For the rest of the evening, too mortified to go back to the dining table, I nursed a bit of potato salad on my plate.
Next day Meg and I got on the school bus together. I wasn’t sure how she would feel about me after the spectacle our family made at the party. But she was just the same as usual, and the only reference she made to the party was, “Hope you and your folks got enough to eat last night. You certainly didn’t take very much. Mom never tries to figure out how much food to prepare. She just puts everything on the table and hopes for the best.”
I began to relax. The Gleasons’ dinner party wasn’t so different from a Chinese meal after all. My mother also puts everything on the table and hopes for the best.
Meg was the first friend I had made after we came to America. I eventually got acquainted with a few other kids in school, but Meg was still the only real friend I had.
My brother didn’t have any problems making friends. He spent all his time with some boys who were teaching him baseball, and in no time he could speak English much faster than I could—not better, but faster.
THE END
BY:CHASITY MCKELLAR
