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<p><strong>Ecology</strong> (from Greek: οίκος, <em>oikos</em>, "household"; and λόγος, <em>logos</em>, "knowledge") is the scientific study of the distribution and abundance of living organisms and how the distribution and abundance are affected by interactions between the organisms and their Ecosystem includes both physical properties, which can be described as the sum of local abiotic factors such as insolation (sunlight), climate, and geology, and biotic factors, which are other organisms that share its habitat. The term <em>oekologie</em> was coined in 1866 by the German biologist Ernst Haeckel.</p>
<p>The word "ecology" is often used in common parlance as a synonym for the natural environment or environmentalism. Likewise "ecologic" or "ecological" is often taken in the sense of environmentally friendly.<script type="text/javascript">//<![CDATA[ if (window.showTocToggle) { var tocShowText = "show"; var tocHideText = "hide"; showTocToggle(); } //]]></script></p>
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<h2><span class="mw-headline">Scope</span></h2>
<dl><dd><strong>Intraspecific relations</strong> are those which are established between individuals of the same species, forming a population. They are relations of co-operation or competition, with division of the territory, and sometimes organization in hierarchical societies. </dd></dl>
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<div class="thumbinner" style="WIDTH: 302px"><img class="thumbimage" height="225" alt="An ant lion lies in wait under its pit trap, built in dry dust under a building, awaiting unwary insects that fall in. Many pest insects are partly or wholly controlled by other insect predators." width="300" longdesc="/wiki/Image:Ant_lion_8785.JPG" src="http://upload.wikimedia.org/wikipedia/en/thumb/d/d5/Ant_lion_8785.JPG/300px-Ant_lion_8785.JPG" width="300" longdesc="/wiki/Image:Ant_lion_8785.JPG" />
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<div class="magnify" style="FLOAT: right"><img height="11" alt="" width="15" src="http://en.wikipedia.org/skins-1.5/common/images/magnify-clip.png" width="15" /></div>
An ant lion lies in wait under its pit trap, built in dry dust under a building, awaiting unwary insects that fall in. Many pest insects are partly or wholly controlled by other insect predators.</div>
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<h2><span class="mw-headline">External links</span></h2>
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<li><a class="external text" title="http://www.barrameda.com.ar/ecology" rel="nofollow" href="http://www.barrameda.com.ar/ecology" rel="nofollow"><font color="#0066cc">What is Ecology?</font></a> </li> <li><a class="external text" title="http://www.econguru.com/fundamentals_of_ecology/" rel="nofollow" href="http://www.econguru.com/fundamentals_of_ecology/" rel="nofollow"><font color="#0066cc">Fundamentals of Ecology</font></a> Textbook-style investigation to the economy of nature, breaks down in 4 chapters from Population to Ecosystem. </li>
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<li>생명체와 환경 간 상호 작용에 대한 연구. </li>
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