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      <title>APES Unit 1: The Living World-Ecosystems by Andrea Neises</title>
      <link>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4</link>
      <description>Steps to creating Unit Padlet Essential Knowledge study guides:

(1) Go to the APES CED: https://apcentral.collegeboard.org/pdf/ap-environmental-science-course-and-exam-description.pdf
(2) Scroll down to the Unit and Topic
(3) Copy an Essential Knowledge statement, and paste it as a Padlet post. 
(4) Read and modify the statement to clarify (if needed) &amp; give the post a title that conveys the meaning.
(5) Select an graph, infographic, diagram, or image that effectively represents the post.</description>
      <language>en-us</language>
      <pubDate>2020-04-28 13:15:05 UTC</pubDate>
      <lastBuildDate>2024-10-28 16:12:37 UTC</lastBuildDate>
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      <item>
         <title>Symbiosis</title>
         <author>andrea_neises</author>
         <link>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/536339097</link>
         <description><![CDATA[<div>A long term close interactions between two species. May be mutualism, commensalism,  or parasitism</div>]]></description>
         <enclosure url="https://www.yourdictionary.com/image/articles/15527.Symbiosis.jpg" />
         <pubDate>2020-04-28 13:28:40 UTC</pubDate>
         <guid>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/536339097</guid>
      </item>
      <item>
         <title>Competition</title>
         <author>andrea_neises</author>
         <link>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/536343493</link>
         <description><![CDATA[<div>Can occur between two different species or within same species. Resource partitioning can help to reduce negative impacts of competition by dividing up places or times for resources.</div>]]></description>
         <enclosure url="http://krupp.wcc.hawaii.edu/BIOL200/powerpnt/ecolprin/img017.jpg" />
         <pubDate>2020-04-28 13:30:12 UTC</pubDate>
         <guid>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/536343493</guid>
      </item>
      <item>
         <title>Predator-prey relationship</title>
         <author>andrea_neises</author>
         <link>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/536351655</link>
         <description><![CDATA[<div>When one organism (predator) eats another organism (prey).</div>]]></description>
         <enclosure url="http://ib.bioninja.com.au/_Media/predator-prey_med.jpeg" />
         <pubDate>2020-04-28 13:33:03 UTC</pubDate>
         <guid>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/536351655</guid>
      </item>
      <item>
         <title>Trophic Levels</title>
         <author>rmarbella</author>
         <link>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537067185</link>
         <description><![CDATA[<div>Continuous inflow<br>of high-quality energy in order to maintain their<br>structure and function </div>]]></description>
         <enclosure url="https://biologydictionary.net/wp-content/uploads/2016/12/Trophic-levels.jpg" />
         <pubDate>2020-04-28 17:17:34 UTC</pubDate>
         <guid>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537067185</guid>
      </item>
      <item>
         <title>What is the Nitrogen Cycle?</title>
         <author></author>
         <link>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537068253</link>
         <description><![CDATA[<div>The nitrogen cycle is the movement of atoms<br>and molecules containing the element nitrogen<br>between sources and sinks.</div>]]></description>
         <enclosure url="https://www.onlinebiologynotes.com/wp-content/uploads/2018/07/nitrogen-cycle.jpg" />
         <pubDate>2020-04-28 17:17:58 UTC</pubDate>
         <guid>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537068253</guid>
      </item>
      <item>
         <title>Major Reservoirs</title>
         <author></author>
         <link>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537069356</link>
         <description><![CDATA[<div>Major reservoirs of phosphorus in the phosphorus cycle are rock and sediments that contain phosphorus-bearing minerals. </div>]]></description>
         <enclosure url="http://www.onegeology.org/extra/kids/images/chemicalWeathering.jpg" />
         <pubDate>2020-04-28 17:18:22 UTC</pubDate>
         <guid>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537069356</guid>
      </item>
      <item>
         <title>Learning Objective</title>
         <author></author>
         <link>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537070180</link>
         <description><![CDATA[<div>Explain the steps and<br>reservoir interactions in the<br>hydrologic cycle.</div>]]></description>
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         <pubDate>2020-04-28 17:18:40 UTC</pubDate>
         <guid>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537070180</guid>
      </item>
      <item>
         <title>biochemical cycles</title>
         <author></author>
         <link>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537070447</link>
         <description><![CDATA[<div>they are essential for life and shows the conservation of matter</div>]]></description>
         <enclosure url="http://image.slidesharecdn.com/biogeochemicalcycles-120914165417-phpapp01/95/biogeochemical-cycles-1-728.jpg?cb=1347641775" />
         <pubDate>2020-04-28 17:18:46 UTC</pubDate>
         <guid>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537070447</guid>
      </item>
      <item>
         <title>What is the Carbon Cycle?</title>
         <author>adiazespinoza</author>
         <link>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537070699</link>
         <description><![CDATA[<div> The carbon cycle is the movement of atoms and molecules containing the element carbon between sources and sinks. </div>]]></description>
         <enclosure url="" />
         <pubDate>2020-04-28 17:18:52 UTC</pubDate>
         <guid>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537070699</guid>
      </item>
      <item>
         <title>Limitations to Phosphorus Cycle</title>
         <author></author>
         <link>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537071364</link>
         <description><![CDATA[<div>Since phosphorus doesn't have an atmospheric component it is often scare if undisturbed. It is usually stored in rock and released into bodies of water by weathering.<br><br></div>]]></description>
         <enclosure url="http://www.shmoop.com/images/biology/biobook_eco_13.png" />
         <pubDate>2020-04-28 17:19:07 UTC</pubDate>
         <guid>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537071364</guid>
      </item>
      <item>
         <title>Essential Knowledge on Hydrologic Cycle </title>
         <author></author>
         <link>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537071909</link>
         <description><![CDATA[<div>-The hydrologic cycle, which is powered by the sun, is the movement of water in its various<br>solid, liquid, and gaseous phases between sources and sinks.<br><br>The phases can include condensation, evaporation, transpiration, and precipitation,surface runoff.<br><br>-The oceans are the primary reservoir of water at the Earth’s surface, with ice caps and<br>groundwater acting as much smaller reservoirs.</div>]]></description>
         <enclosure url="https://www.conserve-energy-future.com/wp-content/uploads/2016/05/hydrologic-cycle.jpg" />
         <pubDate>2020-04-28 17:19:19 UTC</pubDate>
         <guid>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537071909</guid>
      </item>
      <item>
         <title></title>
         <author></author>
         <link>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537073898</link>
         <description><![CDATA[<div>Most of the reservoirs in which nitrogen compounds occur in the nitrogen cycle hold those compounds for relatively short periods of time.</div>]]></description>
         <pubDate>2020-04-28 17:20:00 UTC</pubDate>
         <guid>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537073898</guid>
      </item>
      <item>
         <title>What is Primary Productivity?</title>
         <author>lalvarez121</author>
         <link>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537074933</link>
         <description><![CDATA[<div>Primary productivity is the rate at which solar energy (sunlight) is converted into organic compounds via photosynthesis over a unit of time.</div>]]></description>
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         <pubDate>2020-04-28 17:20:22 UTC</pubDate>
         <guid>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537074933</guid>
      </item>
      <item>
         <title>Global Distribution of Resources</title>
         <author></author>
         <link>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537075101</link>
         <description><![CDATA[<div>The global distribution of terrestrial natural resources varies because  of some combination of climate, geography, latitude and altitude, nutrient availability, and soil.</div>]]></description>
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         <pubDate>2020-04-28 17:20:26 UTC</pubDate>
         <guid>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537075101</guid>
      </item>
      <item>
         <title>Freshwater Biomes </title>
         <author></author>
         <link>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537075310</link>
         <description><![CDATA[]]></description>
         <enclosure url="https://i.ytimg.com/vi/Xcn4BjjWIiA/maxresdefault.jpg" />
         <pubDate>2020-04-28 17:20:31 UTC</pubDate>
         <guid>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537075310</guid>
      </item>
      <item>
         <title>Marine Biomes </title>
         <author></author>
         <link>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537075330</link>
         <description><![CDATA[<div>Include oceans, coral reefs marshland, and estuaries.  Algae supplies oxygen and takes in carbon dioxide.</div>]]></description>
         <enclosure url="https://ucmp.berkeley.edu/images/biomes/estuary_sequence.jpg" />
         <pubDate>2020-04-28 17:20:32 UTC</pubDate>
         <guid>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537075330</guid>
      </item>
      <item>
         <title>Energy Flow</title>
         <author>rmarbella</author>
         <link>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537075787</link>
         <description><![CDATA[<div>Starts from the sun to producers in the lowest trophic levels and then upward to higher trophic levels.</div>]]></description>
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         <pubDate>2020-04-28 17:20:41 UTC</pubDate>
         <guid>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537075787</guid>
      </item>
      <item>
         <title>Climate in Biomes</title>
         <author></author>
         <link>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537077633</link>
         <description><![CDATA[<div>Humidity, wind, rainfall and atmospheric pressure are all part of climate which determines the nature of a biome.</div>]]></description>
         <enclosure url="https://upload.wikimedia.org/wikipedia/commons/6/68/Climate_influence_on_terrestrial_biome.svg" />
         <pubDate>2020-04-28 17:21:22 UTC</pubDate>
         <guid>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537077633</guid>
      </item>
      <item>
         <title>What is the phosphorus cycle?</title>
         <author></author>
         <link>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537077858</link>
         <description><![CDATA[<div>The phosphorus cycle is the movement of phosphorus molecules between sources and sinks.</div>]]></description>
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         <pubDate>2020-04-28 17:21:27 UTC</pubDate>
         <guid>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537077858</guid>
      </item>
      <item>
         <title>The 10% Rule </title>
         <author></author>
         <link>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537079455</link>
         <description><![CDATA[<div> Approximates that in the transfer of energy from one trophic level to the next, only about 10% of the energy is passed on. </div>]]></description>
         <enclosure url="https://image.slidesharecdn.com/energyflow-150812011757-lva1-app6891/95/energy-flow-6-638.jpg?cb=1439342305" />
         <pubDate>2020-04-28 17:22:03 UTC</pubDate>
         <guid>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537079455</guid>
      </item>
      <item>
         <title>The Process </title>
         <author></author>
         <link>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537079590</link>
         <description><![CDATA[<div>During nitrogen fixation, atmospheric nitrogen is converted into ammonia which can be used by animals and plants. Assimilation occurs when plants and animals use or intake ammonia or nitrate. </div>]]></description>
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         <pubDate>2020-04-28 17:22:06 UTC</pubDate>
         <guid>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537079590</guid>
      </item>
      <item>
         <title>Reservoirs</title>
         <author>adiazespinoza</author>
         <link>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537080666</link>
         <description><![CDATA[<div>Some of the reservoirs in which carbon compounds occur in the carbon cycle hold those compounds for long periods of time, while some hold them for relatively short periods of time.  </div>]]></description>
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         <pubDate>2020-04-28 17:22:27 UTC</pubDate>
         <guid>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537080666</guid>
      </item>
      <item>
         <title>Food Chains and Food Webs</title>
         <author></author>
         <link>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537081510</link>
         <description><![CDATA[<div>Compliment each other as Food Webs are made of Food Chains, they are a part of a feeding cycle.</div>]]></description>
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         <pubDate>2020-04-28 17:22:45 UTC</pubDate>
         <guid>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537081510</guid>
      </item>
      <item>
         <title>Cellular respiration and Photosynthesis </title>
         <author></author>
         <link>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537082079</link>
         <description><![CDATA[<div>The carbon cycle is the pathways through which carbon is recycled in the biosphere. While cellular releases carbon dioxide into the environment, photosynthesis pulls carbon dioxide out <strong>of</strong> the atmosphere.</div>]]></description>
         <enclosure url="" />
         <pubDate>2020-04-28 17:22:57 UTC</pubDate>
         <guid>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537082079</guid>
      </item>
      <item>
         <title>Example of Reservoir </title>
         <author></author>
         <link>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537088338</link>
         <description><![CDATA[<div>The atmosphere is an example of a major reservoir. </div>]]></description>
         <enclosure url="" />
         <pubDate>2020-04-28 17:25:16 UTC</pubDate>
         <guid>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537088338</guid>
      </item>
      <item>
         <title>Global Distribution of Biomes</title>
         <author></author>
         <link>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537089490</link>
         <description><![CDATA[<div>The worldwide distribution of biomes changes as a result of global climate changes</div>]]></description>
         <enclosure url="https://emmasecology.files.wordpress.com/2014/09/terestrial-biomes.jpg" />
         <pubDate>2020-04-28 17:25:42 UTC</pubDate>
         <guid>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537089490</guid>
      </item>
      <item>
         <title>Gross primary productivity </title>
         <author>lalvarez121</author>
         <link>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537089772</link>
         <description><![CDATA[<div>Gross primary productivity is the total rate of photosynthesis in a given area.</div>]]></description>
         <enclosure url="" />
         <pubDate>2020-04-28 17:25:49 UTC</pubDate>
         <guid>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537089772</guid>
      </item>
      <item>
         <title>Net primary productivity</title>
         <author>lalvarez121</author>
         <link>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537090272</link>
         <description><![CDATA[<div>Net primary productivity is the rate of energy storage by photosynthesizers in a given area, after subtracting the energy lost to respiration.</div>]]></description>
         <enclosure url="" />
         <pubDate>2020-04-28 17:25:59 UTC</pubDate>
         <guid>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537090272</guid>
      </item>
      <item>
         <title>Food Webs</title>
         <author></author>
         <link>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537091245</link>
         <description><![CDATA[<div>Connection between organisms in an ecosystem where it is visble who eats who and gains nutrients from them. The diagrams do not follow a specific order.</div>]]></description>
         <enclosure url="" />
         <pubDate>2020-04-28 17:26:22 UTC</pubDate>
         <guid>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537091245</guid>
      </item>
      <item>
         <title>Types of Terrestrial Biomes</title>
         <author></author>
         <link>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537092468</link>
         <description><![CDATA[<div> Some major examples are  savanna, tundra, tropical rainforest, desert, taiga, temperate grassland and shrubland.</div>]]></description>
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         <pubDate>2020-04-28 17:26:50 UTC</pubDate>
         <guid>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537092468</guid>
      </item>
      <item>
         <title>Food Chains</title>
         <author></author>
         <link>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537095033</link>
         <description><![CDATA[<div>In comparison to the Food Web, Food Chain diagrams are in linear order; starting from producer organisms and so on.</div>]]></description>
         <enclosure url="" />
         <pubDate>2020-04-28 17:27:39 UTC</pubDate>
         <guid>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537095033</guid>
      </item>
      <item>
         <title>Energy can be converted from one form to another.</title>
         <author>mgutierrezcamacho</author>
         <link>https://padlet.com/andrea_neises/g3tgq6j08dbvhas4/wish/537097211</link>
         <description><![CDATA[<div>The loss of energy that occurs when energy moves from lower to higher trophic levels can be explained through the laws of thermodynamics. </div>]]></description>
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         <pubDate>2020-04-28 17:28:30 UTC</pubDate>
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