220_Lecture_Competition

220_Lecture_Competition - Competition LAND/SOCR 220 Key...

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Competition LAND/SOCR 220
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ey ideas Key ideas •C o mpetition: use or defense of a resource by one individual that reduces the availability of that resource to other individuals • Intraspecific competition: among the same species nterspecific competition: between different • Interspecific competition: species •S uperior competitors survive at lower up r r c mp t t r ur at w r resource levels • Read Tansley study on pp. 364-365
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igure 19 2 Figure 19.2
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Types of Resources • Non-renewable: not regenerated (e.g. space) • Renewable: constantly regenerated or Renewable replenished – From external sources (e.g. sunlight) – Direct Internal regeneration (e.g. prey) – Indirect Internal regeneration (e.g. nutrients that are released during decomposition but not directly taken up by the organism) • least important for lab competition studies, likely very important in nature • Limiting Resource (Liebig’s Law of the Minimum) the resource that restricts growth. ometimes there is co mitation by multiple Sometimes there is co-limitation by multiple resources.
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ompetitive Exclusion Competitive Exclusion
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220_Lecture_Competition - Competition LAND/SOCR 220 Key...

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