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Species Interactions: Competition, Amensalism, Parasitism, Predation (negative Part I)

#bscbotany #botany #12biologyclass #11biology #ecology #neet #upsc #msc For pdf notes and Book visit https://www.biologylectures.com/ Positive species interaction link.    • Species Interactions, Commensalism, P...    Competition is the type of association in which both the organisms suffer adversely.  Competition can be interspecific or intraspecific. Generally, the intraspecific competition is more intense.  Competition can be further classified into a. Direct interference type: In this the interacting species directly inhibit each other as they come in direct contact with each other. b. Resource use type: It results indirect inhibition when common resource is in short supply.  Competitive exclusion principle (Gause’s Principle): In the simplest form this principle states that a complete competitor cannot coexist.  Abingdon tortoise in Galapagos Islands became extinct within a decade after goats were introduced on the island.  Lotka-volterra model describes the outcome of competition between two species (coexist or eliminate) and it is based on logistic growth equation.