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      <title>Ecosystems by Tania Arriaga</title>
      <link>https://padlet.com/taniaarriaga80/a10mkjuswra3</link>
      <description>What Are They and How Do They Work</description>
      <language>en-us</language>
      <pubDate>2018-11-12 17:08:36 UTC</pubDate>
      <lastBuildDate>2025-11-06 14:31:42 UTC</lastBuildDate>
      <webMaster>hello@padlet.com</webMaster>
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         <title>Natural Biogeochemical Cycles</title>
         <author>taniaarriaga80</author>
         <link>https://padlet.com/taniaarriaga80/a10mkjuswra3/wish/303370407</link>
         <description><![CDATA[<div><strong><em>CARBON CYCLE<br></em></strong>-CO2 gas is an important temperature regulator on earth <br>-Photosynthesis and aerobic respiration circulates carbon in biosphere<br>-Fossil fuel contain carbon <br><strong><em>NITROGEN CYCLE <br></em></strong>The Nitrogen cycle converts nitrogen into compounds that are useful nutrients for plants and animals<br>-specialized bacteria convert gaseous nitrogen to ammonia in nitrogen fixation <br>-special bacteria convert ammonia in the soil to nitrate ions and nitrite ions; the latter is used by plants as a nutrient. This process is nitrification<br>-Decompose bacteria deritius into ammonia and water-soluble salts in ammonification <br>-In identification, nitrogen leaves the soil, Anaerobic bacteria in soggy soil and bottom sediments of water areas convert NH3 AND NH4 back into nitrite and nitrate ions, and then nitrogen gas and nitrous oxide gas are released into atmosphere <br><strong><em>PHOSPHORUS CYCLE <br></em></strong>-Most soils contain little phosphate and it is often the limiting factor for plant growth<br>-Phosphorus is used as a fertilizer to encourage plant growth <br>-Phosphorus also limits growth of producers in freshwater streams and lakes due to low solubility in water<strong><em><br>SULFUR CYCLE<br></em></strong>-Natural sources of sulfur are hydrogen sulfide, released from volcanoes, swamps, bogs and tidal flats <br>-Particles of sulfate such ammonium sulfate, enter the atmosphere from sea spray,dust storms, and forest fires<br>-Sulfur compounds can be converted to sulfuric acid, which falls as acid deposition<br>-Burning coal and oil, refining oil, and the production of some metals from ores all add sulfur to the environment <strong><em><br>WATER CYCLES</em></strong> <br>-We withdraw large quantities of water <br>-We clear vegetation and increase runoff reduce filtering and increase flooding<br>-We increase flooding as we drain and alter wetlands </div>]]></description>
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         <pubDate>2018-11-12 17:17:04 UTC</pubDate>
         <guid>https://padlet.com/taniaarriaga80/a10mkjuswra3/wish/303370407</guid>
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         <title>Ecosystem Diversity</title>
         <author>taniaarriaga80</author>
         <link>https://padlet.com/taniaarriaga80/a10mkjuswra3/wish/303370437</link>
         <description><![CDATA[<div>BIODIVERSITY <br>-the variety of species,genes,ecosystems, and ecosystem processes<br>-the important part of natural capital<br>-species are individual that can make and produce viable offspring<br>-species diversity,genetic diversity, ecosystem diversity, and functional diversity <br>NATURAL SELECTION<br>-can only act on existing genes and i limited by reproductive capacity <br>EVOLUTION <br>-is the change in a populations genetic makeup over time<br>-all species descend from earlier, ancestral species--theory of evolution<br>ECOSYSTEM SERVICES<br><br><br><br></div>]]></description>
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         <pubDate>2018-11-12 17:17:08 UTC</pubDate>
         <guid>https://padlet.com/taniaarriaga80/a10mkjuswra3/wish/303370437</guid>
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         <title>Natural Ecosystem Change</title>
         <author>taniaarriaga80</author>
         <link>https://padlet.com/taniaarriaga80/a10mkjuswra3/wish/303370474</link>
         <description><![CDATA[<div>climate shifts,species movement,ecological succession<br><br></div>]]></description>
         <enclosure url="" />
         <pubDate>2018-11-12 17:17:11 UTC</pubDate>
         <guid>https://padlet.com/taniaarriaga80/a10mkjuswra3/wish/303370474</guid>
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         <title>Energy Flow</title>
         <author>taniaarriaga80</author>
         <link>https://padlet.com/taniaarriaga80/a10mkjuswra3/wish/303370499</link>
         <description><![CDATA[<div><strong><em>PHOTOSYNTHESIS<br></em></strong>-CO2+H2O+SUNLIGHT -&gt; GLUCOSE + OXYGEN<br>-Photosynthesis is the process by which plants take solar energy<br><strong><em>FOOD WEBS<br></em></strong>-Network of interconnected food chains <br><strong><em>TROPHIC LEVELS<br></em></strong>- First Trophic Levels (PRODUCERS PLANTS)<br>-Second Trophic Levels<br>(PRIMARY CONSUMERS HERBIVORES)<br>-Third Trophic Levels<br>(SECONDARY CONSUMERS CARNIVORES)<br>-Fourth Trophic Levels <br>(TERTIARY CONSUMERS TOP CARNIVORES)<br><strong><em>ECOLOGICAL PYRAMIDS<br></em></strong>-90% of energy lost with each transfer <br>-Less chemical energy for higher trophic levels <br>-Tertiary Consumers (HUMAN)<br>-Secondary Consumers (PERCH)<br>-Primary Consumers (ZOOPLANKTON)<br>-Producers<br>(PHYTOPLANKTON)</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-11-12 17:17:15 UTC</pubDate>
         <guid>https://padlet.com/taniaarriaga80/a10mkjuswra3/wish/303370499</guid>
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      <item>
         <title>Ecosystem Structure</title>
         <author>taniaarriaga80</author>
         <link>https://padlet.com/taniaarriaga80/a10mkjuswra3/wish/303370529</link>
         <description><![CDATA[<div>biological populations<br><br>species <br>ecological niches,<br><br>-pattern of living: everything that affects survival and reproduction<br>-water,space,sunlight,food,temperatures<br>interactions,keystone species,species diversity, major terrestrial &amp; aquatic biomes</div>]]></description>
         <enclosure url="" />
         <pubDate>2018-11-12 17:17:18 UTC</pubDate>
         <guid>https://padlet.com/taniaarriaga80/a10mkjuswra3/wish/303370529</guid>
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