Understanding Microbial Ecology: Interactions and Associations in Ecosystems

Interactions of organisms in ecosystems play a crucial role in the functioning of microbial ecology. Dr. Abhishek Thakur explores symbiosis, mutualism, syntrophism, commensalism, predation, and parasitism, shedding light on how different organisms interact with each other and their physical environment. These relationships define the balance and dynamics within microbial communities.

• Microbial Ecology
• Ecosystem Interactions
• Symbiosis
• Mutualism
• Syntrophism

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1. Microbial ecology Microbial ecology Dr. Abhishek Thakur (Assistant Professor) College of Fisheries, Kishjanganj BASU, Patna

2. Interactions of organisms with each other and with their physical environment contribute to the functioning of ecosystems.

3. Symbiosis Symbiosis Symbiosis is an association: in a number of ways: 1. Ectosymbiosis-microorganism 2. Endosymbiosis-microorganism 3. Ecto/ endo symbiosis-microorganism

4. Mutualism Mutualism Obligatory association : reciprocal benefit to both partners. example: Lichens-an ,fungus ,alga, Fungal partner, obtains nutrients well as oxygen. Algal partner is protected from excess light

5. Syntrophism Syntrophism Syntrophism - mutually beneficial relationship each organism provides one or more growth factors, nutrients, or substrates for the other cross-feeding or the satellite phenomenon

6. Commensalism Commensalism The microorganism (commensal) benefits, while the host is neither harmed nor helped Escherichia coli lives in the colon Uses oxygen creating an anaerobic environment in which obligate anaerobes Bacteroides grow.

7. Predation Predation Predator organism engulfs or attacks a prey organism; Predatory bacteria are known Bdellovibrio, Vampirococcus, and Daptobacter

8. Parasitism Parasitism One organism (parasite) benefits from another (host)

9. Thank You