| What is the:
-Abundance of an Organism?
-Distribution of an Organism? | -Abundance of an Organism is just How Many Individuals you Find in an Area. This gives you the Population
-Distribution of an Organism is Where the Organism lives in the Habitat - like a Tree or a Mound. |
| Why would you take Samples of a Population? | -Simple: It will take too Long and it will Cost a Lot to Support that Project.
-Samples make it Easier, although you need to note that the Sample may not do Justice for the Entire Population. |
| How can you Measure or Estimate the:
1. Abundance of an Organism?
2. Distribution of an Organism? | 1. Abundance requires just Counting the Number of Individuals - or a Percentage Cover - in Samples. Results have to be Scaled up to be True for the Population
2. Distribution can be Measured by using 2 Sample Areas and see the Contrast, or using a Transect [A Line] and having Sample Areas connected with the Transect. |
| What are Pooters used for? How do they even Work? How may be it Useful for Abundance and Distribution? [Note this is only Useful for GROUND Insects] | -Pouters are just Jars that have Bung on the Top, and 2 Tubes struck through said Bung.
-Breathing in through the SHORT Tube will mean that the LONGER Tube will pick up Any Insects, if Under said Tube
-1st Sample Area: For a few Minutes suck as Many Insects as you can, and then Count that Number
-2nd Sample Area: Do the Same as Above, and Compare your Results. |
| What are Pitfall Traps? How do they even Work? How may be it Useful for Abundance and Distribution? | -This is your Cartoon Style Traps - Container that are in a Hole, which is Covered with Nature or Wooden Pile supported by Pebbles.
-Insects on the Ground will Fall because there is also Food in the Container.
-Leaving it Overnight will give you a Number of Insects in that Sample Area - do the Same in the Next Night in a Different Sampling Area and then Compare the Results. |
| What is a
1. Sweep Net
2. Pond Net | 1. Sweep Nets is a Net with Strong Cloth - useful for Insects, Spiders... from Long Grass. Using it requires to Stand Still, and then Sweep the Net from Left to Right through said Grass. Then Sweep the Net up, put All the Insects in a Container and then Count them
2. Pond Nets is a Net for Collecting Insects, Water Snails.. from the Ponds or Rivers. Shocking. Using it requires to Sweep the Net from the Bottom of the Pond or River, and then Turn out into a Tray with Water to Count the Result. |
| What is a Quadrat? How may it be Useful? | -This is just a Square that encloses an Area of which you Know of.
-Placing it in a Random Point at your First Sample Area, then Count all the Organisms you want in the Quadrat, then Repeat, Repeat and Repeat. [Why? A Bigger Sample will always be more True to the Population]
-Gain the Mean of the amount of Organism you Found / Number of Quadrats
-Do this in your Second Sampling Area, and Compare the Changes. |
| How can you Estimate the Population from a Small Sample Area? [An Estimate may not Equal the True Population Size] | -To Find that Number First, you need to get the Mean Number of Organisms per m² - which is just Total Number of Organism / Number of Quadrats
-Then, Multiply Mean Number of Organisms per m² by the Total Area. |
| How can you Estimate the Population from the Capture-Recapture System? | -Capture a Sample of a Population and Mark them, obviously do not Harm the Animal or Change their Survival Chances.
-Release them back, and then Recpature another Sample of the Population - maybe do this in a Day After you Began.
-Then, Equation!!
Population Size = (Number in First Sample x Number in Second Sample) / Number in Second Sample already Marked.
[Keep in Note your Marked Organisms may Die from Natural Causes, so again, this is why its a Prediction. Also Luck is needed - find 0 Organisms marked and well :( ] |
