Update Unit_3_Biology_Study_Sheet.md

Grade 9/Science/SNC1DZ/Unit_3_Biology_Study_Sheet.md

@@ -43,6 +43,8 @@
 - `Intraspecifict`: Same species fighting.
 - `Watershed`: An area or ridge of land that separates waters flowing to different rivers, basins, or seas.
 - `Intertidal Zone`: The intertidal zone, also known as the foreshore and seashore, is the area that is above water at low tide and underwater at high tide.
+- `Limiting Factor`: Any factor that restricts the size of a population.
+- `Tolerance Range`: The abiotic conditions within which a species can survive.
 
 ## The Spheres of Earth
 
@@ -168,7 +170,7 @@ efficiency varies from `5%` to `20%` energy available between successive trophic
     - Evaporation, Condensation, Precipitation, Percolation (Infiltration, water seeping into ground), Run-off, transpiration (plants losing water to air)
     - Forms: Solid (ice), Liquid (water), Gas (vapour)
 
-### STEPS/PROCESS:
+### Steps/Process:
 - Exchange of energy leads to:
     - Temperature Change, Climate
     - Condenses 🡪 occurs during cooler temp
@@ -193,7 +195,7 @@ efficiency varies from `5%` to `20%` energy available between successive trophic
 - Building block of all living things
 - Main Pathway – in and out of living matter
 
-### STEPS/PROCESSES
+### Steps/Process
 - All living organisms contain carbon.
 - CO<sub>2</sub> is a waste product of cellular respiration
 - Plants use carbon dioxide and water to form simple sugars (photosynthesis)
@@ -225,7 +227,7 @@ efficiency varies from `5%` to `20%` energy available between successive trophic
     - Most living organisms are `unable` to use this form of nitrogen
     - Therefore, must be **converted** to a usable form!
 
-### STEPS/PROCESSES
+### Steps/Process
 <img src="https://image.slidesharecdn.com/lab-11methodsforestimatingdenitrificationprocess-130414125752-phpapp01/95/lab11-methods-for-estimating-denitrification-process-4-638.jpg?cb=1365944316" width="300">
 
 ### Nitrogen Fixation
@@ -378,9 +380,32 @@ efficiency varies from `5%` to `20%` energy available between successive trophic
 * Heavy precipitation on leeward side of mountains
 * `Species` Elk, cougar, large coniferous trees, ferns.
 
+## Biodiversity
+- The importance 
+
+
 ## Introducing Ecosystems
 - Most ecosystems are **SUSTAINABLE**.
 
+<table class="table">
+<tr>
+<th>Ecosystem</th><th>Key abiotic factors</th><th>Human action and result</th>
+</tr>
+<tr>
+<th>Terrestrial Ecosystems</th>
+<td>Light availability <br><br>Water availability<br><br>Nutrient availability<br><br>Temperature</td>
+<td>Clear-cutting and fire remove shade and expose the remaining organisms to much more light<br><br>Damming rivers and draining swamps and marshes change water availability. Irrigation increases water availability<br><br>Farming practices may increase or decrease nutrient levels in the soil.<br><br>Global warming is decreasing suitable habitat for many cool-adapted species.</td>
+</tr>
+<tr>
+<th>Aquatic Ecosystems</th>
+<td>Light availability<br><br><br>Nutrient availability<br><br><br>Acidity<br><br><br>Temperature<br><br>Salinity<br><br></td>
+<td>Activities that increase erosion or stir up the bottom cloud the water and reduce light penetration.<br><br>Nutrient runoff from agriculture and urban enviornments increases the nutrient content of <br> surface water and groundwater, causing algal blooms<br><br>Acidic air pollution results in acid precipitation. Carbon dioxide emissions <br>produced by the burning of fossil fuels are increasing the acidity of the oceans.<br><br>Industries and power plants release heated waste water into lakes and rivers, killing fish and other organisms.<br><br>Salting highways and long-term irrigation practices can cause salt to accumlate.<br></td>
+</tr>
+</table>
+
+- `Limiting factors` can be something such as access to water, availability of food. Can be **both** `abiotic` and `biotic`. Human influences often act as `limiting factors`. 
+- The carry capacity of an ecoystem is a limit where the organisms in that ecosystem can sustain themselves, human impacts often lower the `carry capacity`, as things such as pollution, destruction of habitats drastically lowers the `sustainability` of a ecosystem. In general, `limiting factors` link directly to `carrying capacity` as the the factors tell us the size that that the ecosystem can sustain itself. Which is essentially the `carrying capacity`.
+
 ### Ecosystem Services/Products
 - **Cultural Services**
     - Benefits relating to our enjoyment of the environment.