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21 Cards in this Set

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the teacher U how ecosystems
TOP EIGHT CRITICAl words on section chapter 50
FOOD CHAINS ARE EXPRESSIONS OF THE INTERACTIONS BETWEEN ORGANISM IN THEIR STRUGGLE TO OBTAIN ENERGY at the base of theser interactions are plants, which are responsible for introducing energy and nutrients into the food chain and at the end are the decomposters
comp 4
In the majortiy of ecosystems, all energy orginates from the sun and is destined to be lost as heat, energy, in fact, is npot recylced, while nutrients aare
the teacher understands ecosystems are developed
The plants and animals that are found in a particular location are referred to as an ecosystem. These plants and animals depend on each other to survive. In a delicate balance, these life forms help to sustain one another in regular patterns. Disruptions to an ecosystem can be disastrous to all organisms within the ecosystem.
-work together as a functional enviroment, such as rocks, water, climate, etc.
example of ecosystems
-The frozen cold ecosystems found near the Northern most parts of the Earth are called tundra by scientists. These locations are known for their long cold winters, and their short cool summers.

The Earth’s tundra’s are home to a variety of specialized plants and animals that have adapted to survival in such brutal environments. Animals such as seals, polar bears, arctic hares, and arctic foxes, as well as a variety of other animals have become experts at finding food, and surviving the long cold winters. Many of these animals have white fur, in order to allow them to blend in with the snow.
-The frozen cold ecosystems found near the Northern most parts of the Earth are called tundra by scientists. These locations are known for their long cold winters, and their short cool summers.
The frozen cold ecosystems found near the Northern most parts of the Earth are called tundra by scientists. These locations are known for their long cold winters, and their short cool summers.
niche - the ecological role of an organism in a community.
the ecological role of an organism in a community, sharing abundance of its resource are abundent
physical environment is also part of the niche because it influences how populations affected by, resources and enimies, Different species can hold similar niches in differeint species can hold similar specieans may occupy different niches in diffent locations
postive healthy ecosystem has lots of species diversity is is less likely
to be seriously damaged by human interaction, natural disasters and climate changes
B) The Food Chain
Everyone plays a specific role in the food chain of life. You might be a human thinking they are king of the hill or you might be a bacterium under the feet. You are very important to the survival of the system no matter what role you play.

As you study more about ecosystems and cycles in life, you will see the terms food chains and food webs. They describe the same series of events that happen when one organism consumes another to survive. Food web is a more accurate term since every organism is involved with several other organisms. Cows might be food for humans, bacteria, or flies. Each of those flies might be connected to frogs, microbes, or spiders. There are dozens of connections for every organism. When you draw all of those connecting lines, you get a web-like shape.
Producers are the beginning of a simple food chain. Producers are plants and vegetables. Plants are at the beginning of every food chain that involves the Sun. All energy comes from the Sun and plants are the ones who make food with that energy. They use the process of photosynthesis. Plants also make loads of other nutrients for other organisms to eat.

There are also photosynthetic protists that start food chains. You might find them floating on the surface of the ocean acting as food for small unicellular animals.
Primary Consumers
Consumers are the next link in a food chain. There are three levels of consumers. The levels start with the organisms that eat plants. Scientists named this first group of organisms the primary consumers. They are also called herbivores. They are the plant eaters of the chain. It might be a squirrel or it might be an elk. It will be out there eating plants and fruits. It will not eat animals
Seondary Consumers
Secondary consumers eat the primary consumers. A mouse might be a primary consumer and a cat might be the secondary. Secondary consumers are also called carnivores. Carnivore means "meat eater."
Teritary consumers
In some ecosystems, there is a third level of consumer called the tertiary consumer (that means third level). These are consumers that eat the secondary and primary consumers. A tertiary consumer could be a wolf that eats the cat and the mouse.
The Decomposers
The last links in the chain are the decomposers. If you die, they eat you. If you poop, they eat that. If you lose a leaf, they eat it. Whenever something that was alive dies, the decomposers get it. Decomposers break down nutrients in the dead "stuff" and return it to the soil. The producers can then use the nutrients and elements once it's in the soil. The decomposers complete the system, returning essential molecules to the producers.
Energy Flow through te Ecosystem
It's the organisms of a system that keep the energy flowing.

The energy flow into an ecosystem begins with the sun.

Almost all organisms get needed energy directly or indirectly from the sun. Primary producers use the sun's energy in the process of photosynthesis. These producers are eaten by primary consumers. When this happens the sun's energy, in the form of carbohydrate, flows from producer to consumer.

Primary consumers become food for secondary consumers. When this happens, another energy transfer occurs. Should the secondary consumer become the prey of another (a tertiary consumer), the energy is transferred again. The pattern continues until it's time for the decomposers to do their work. At this point, dead organisms are returned to the soil as simple nutrients.

Energy flow through a system is often called the food chain. In an ecosystem, there are often multiple food chains. As food chains overlap and become increasingly complex, ecologists describe them as food webs.

final close 1:
The teacher understands the definations ad properites of an ecosystem
final close=2
The teacher demonstrates knowledge of the interactions among living things in food chains and food webs
Final closer 3
Understands the Fundamentals of energy flow thorgh as an ecosystem