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Description
Flashcards by eibhlinjones200, updated more than 1 year ago
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Created by eibhlinjones200
almost 11 years ago
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| Question | Answer |
| Ecostystems | - An ecosystem is all the organisms living in a particular area, as well as all the non-living (abiotic) conditions, e.g temperature, salinity and soil quality - an ecosystem isn't the same as a habitat-a habitat is just the place when an organism lives - ecosystems are self-supporting -they contain (almost) everything they need to maintain themselves. Water, nutrients and essential elements like carbon all get recycled within the ecosystem. - the only thing that is needed from outside the ecosystem is an energy source. This is normally the sun. |
| Transects | Distribution is where organisms are found in a particular area. You can investigate distribution using lines called transects. To do a transect, you mark out the line using a tape measure and place quadrats next to each other all the way along the line. You then count and record the organisms you find in the quadrats. If it's too hard to count all the individual organisms in the quadrat you can calculate the %age cover. This means estimating the %age area of the quadrat covered by a particular type of organism. You can plot the results of a transect in a kite diagram |
| Kite diagrams |
Image:
kite_di (image/jpg)
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| Kite diagrams explained | Kite diagrams show the distribution and abundance (number) of organisms along a transect. The abundance is shown by the thickness of the kite shape. The abundance is plotted above and below a central line to make the shape symmetrical. The x-axis shows the distance along the transect line. |
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