Ecology is the study of the relationship between living organisms and their environment. An ecologist is someone who studies those relationships.
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2 Ecology is the study of the relationship between living organisms and their environment. An ecologist is someone who studies those relationships.
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7 Adaptations Living things are adapted, so they 'fit' into their surroundings, to ensure survival. An adaptation is an inherited characteristic that helps an organism survive and reproduce in its environment. Sometimes adaptations are learned during the organism's lifetime.
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13 Ecosystems An ecosystem is the interactions between living and non-living things in a particular environment. An ecosystem is a place where these interactions occur, such as a rotting log, or a forest. All organisms and parts within this place are interacting all the time and adjustments must occur if the organism is to survive. Ecosystems vary in size and complexity.
14 In order to study an entire ecosystem, scientists often study only a small aspect of an ecosystem and then work with other scientists to piece together the overall picture of how the ecosystem functions.
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16 Interactions in Ecosystems Symbiosis Is when two species live closely together in a relationship that lasts over time occurs There are three forms of symbiosis: 1) Mutualism Mutualism occurs when there is a relationship between two different organisms, in which each partner benefits from the relationship.
17 2) Parasitism Parasitism occurs when there is a relationship between two different organisms, in which one partner benefits from the relationship, while the other partner is harmed. Typically, the partner that benefits (the parasite), lives on or in the other organism (the host) and feeds on it.
18 3) Commensalism Commensalism occurs when there is a relationship between two different organisms, in which one partner benefits from the relationship, while the other neither benefits, nor is harmed.
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20 Mutualism both organisms benefit from the relationship. (lichen (algae and fungi) benefit each other) Lichen from the artic tundra
21 Mutualism - both organisms benefit from the relationship. The small worm in the red square cleans off parasites but does not harm the fish
22 Mutualism - both organisms benefit from the relationship. Butterflies pollinate flowers when they get nectar Both organisms benefit
23 Parasitism - one organism benefits while the other organism (the victim) is harmed. (the parasite usually doesn't kill the host, because the host represents the parasite's food supply. (tapeworm in a human host)
24 Parasitism - one organism benefits while the other organism (the victim) is harmed. (the parasite usually doesn't kill the host, because the host represents the parasite's food supply. (tapeworm in a human host)
25 Parasitism - one organism benefits while the other organism (the victim) is harmed Flea Beetles The small black hopping beetles which eat broccoli, lettuce,cabbage, radishes, eggplant, etc.
26 Commensalism The anemonefish lives among the forest of tentacles of an anemone and is protected from potential predators not immune to the sting of the anemone. The anemonefish is protected from the sting of the anomone tentacles by a substance contained in the mucous on its skin
27 Commensalism Barnacles live by using long, feathering appendages to sweep the surrounding water for small, free-floating organisms. Barnacles attach to rocks, ships, shells, whales, and just about anywhere else they can gain a foothold. In the example on the left the two barnacles are attached to the shell of a scallop. The barnacle gains a place to live and, the scallop is not harmed by the presence of the barnacles.
28 Commensalism Barnacles attach whales. The barnacle gains a place to live and, the whale is not harmed by the presence of the barnacles.
29 Commensalism
30 Commensalism Spanish moss - growing on the branches of an oak tree. The oak tree is not affected, but the Spanish moss benefits by being higher up, away from most herbivores, and also in the light (Spanish moss is photosynthetic, so is not a parasite).
31 Symbiotic Relationships Review 1. Leafcutter ants live in the tropics. They cut the leaves off plants and take the leaves to their nests, where they chew up the leaves. They plant fungal spores on the chewed leaf material. The fungi grow and reproduce, feeding on the chewed leaf material. The ants and their larvae also feed on the chewed leaf material. This is an example of because
32 2. Liver fluke worms live inside a sheep s liver. The worms absorb and use the nutrients that pass through the sheep s liver. The sheep do not die, but they are weakened because they do not get all the nutrients from the food they eat. This is an example of because
33 3.The clown fish and sea anemone live together. The sea anemone has poisonous tentacles that sting. Because the clown fish is not affected by this poison, It can hide in the anemone s tentacles. Thus it avoids being eaten by other fish. In return, the clown fish eats the anemone s waste, including scraps of its food. This is an example of because
34 4. Because the dodder plant no longer has chlorophyll, it cannot produce its own food. It grows around the branches and stems of another plant, and extends feeding tubes into the other plant. Once the feeding tubes are in place, the dodder plant sucks up the food that the other plant has produced. The other plant is not able to grow as quickly because it is feeding the dodder plant. This is an example of because
35 Impacts on Ecosystems Symbiotic relationships are only a few ways that organisms interact with one another within an ecosystem. Other interactions may involve the physical changing of the ecosystem by the organisms living in it and interacting with parts of it. Like when a family of beavers makes a dam, the stream below the dam dries up, killing the water organisms that need the water to survive. Above the dam, a pond changes the habitat and limits the kinds of organisms that can survive there. For every action in an ecosystem there is a resulting effect and reaction, which will change the make-up of the ecosystem in some way.
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37 1 - Food 2 - Water 3 gas exchange 4 Suitable habitat 4 Able to get water from plants and surface water - have lungs for gas exchange - able to forage for food - able to hide in habitat
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41 Natural Resources are the materials and products that are found in nature, that people use to meet their basic needs. The impact that people have on the use of resources can be very small, or can be huge, and can lead to positive or negative consequences. The needs of all living things now have to be met with the available natural resources. How we are able to satisfy these needs with minimal conflict will determine how resourceful we can be.
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43 People and Nature - A Changing Relationship The ways people interact with the environment has changed over time. Machines and advanced technologies have caused a higher impact than in the past. All of the needs people had in the past were satisfied by the natural resources they were able to find in the environment around them. Nowadays, resources are transported throughout the world, as the demand gets higher. Lifestyle changes over time have increased the pressure on different environments and the ecosystems we live in.
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49 When Is a Need a Want? Needs are basic to survival, whereas, ' wants ' are things that just make survival more comfortable or enjoyable. Each time a need or a want is satisfied, natural resources or energy are used up. This impacts the environment we live in. Transporting food from all around the world, just so we can have the luxury of choice impacts other regions as well, because those regions had to clear land, use fuel (energy) and through the industrial processes caused pollutants to enter the air.
50 When our 'want' demands conflict with the health of our ecosystems, we need to begin making some more responsible choices. The needs of wildlife can be negatively impacted by the wants of people. When this happens we need to decide whether our want is more important than their need
51 Is it possible to make your own artificial ecosystem? The man shown here tried to. The years preceding the year 2000 were filled with rumours about how the world as we knew it would end at the stroke of midnight, December 31, The Y2K bug, as it was known, was based on the idea that computers would mistakenly recognize the year 2000 as the year 1900, so all of our technology would fail.
52 Many people believed that "disasters" would happen (everything from failing computers, to overloaded hospitals, to loss of water, natural gas, and electricity). The man shown here buried 42 school buses under concrete, connected them to make an emergency shelter, and prepared to live inside the buses when the Y2K bug affected the world.
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55 No Simple Answers Setting a forest on fire (a controlled burn) is often necessary to maintain a balance in the ecosystem. These fires get rid of small trees, leaves, needles and other debris that settles on the forest floor. The new growth after a fire becomes food for elk, deer and other animals that need these nutrients from the forest floor
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57 Knowing what effects you are having on the environment (or will likely have) will help you make decisions. The use of DDT (a chemical pesticide) was found to have a negative effect on Peregrine Falcons. It wasn't until the species was almost lost completely that something was done. DDT was banned and recovery programs were put in place to restore the numbers of peregrine falcons.
58 Swift foxes were accidentally poisoned because certain predators were seen as 'pests' or 'unnecessary' animals. When the Swift foxes used the poison instead, the species almost became extinct. Natural control is necessary in any ecosystem. If this natural control is upset, the impact can have ripple effects, which were never anticipated. Video- DDT and Peregrine Falcon (4 mins)
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63 Your Ecological Footprint The impact you are having on the environment is your ecological footprint. We depend on the environment and we are part of the environment. Sustainability means that the resources from the environment can be replaced as quickly as they are used. Are we putting back what we take out, or, are we using up all the resources before they can be replaced?
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65 Impact Here and There To calculate your ecological footprint, you need to determine the total area of land that you use and water needed to supply all of the energy and materials that you use, as well as absorb all of the waste that you produce. Materials that are included are: food, water, supplies to build shelter and raw materials needed to produce the manufactured products you use. Energy includes: electricity, natural gas, as well as all the energy needed to produce, and transport all of the manufactured products you use
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67 Question In your Science Notes,explain why using carpools, taking short showers, wearing secondhand clothes, and living in an apartment rather than a large home would reduce the size of your ecological footprint. Add your own thoughts about why you would or would not want to do any of these.
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69 The ecological footprint of average Canadians is very large, because they are using many more resources and creating much more waste than is sustainable. Ways to reduce ecological footprint include: 1. Be aware of the products you consume in a typical day 2. Reduce the energy you use 3. Reduce the number of products you buy 4. Reduce the amount of garbage you produce
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