Community interactions – competition, predation, symbiosis



in this video tutorial we'll be talking about different types of interactions between community in the ecosystem so in ecosystem we have community of different populations so have organisms and with the organisms we have populations and in those populations we have a community so community interaction so what we are talking about the hierarchy in the hierarchy we start with organisms multiple organisms together called a population many populations together called community so if we take such community different communities let us say community a community B community different communities let us take two communities for easier understanding most communities have interactions between them now those interaction is very very important to survive in the environment to survive in the environmental conditions and stay together or I mean during their evolution and all the other purpose we require them to stay together and commit so those community interactions there are different modes of community interactions available in the ecosystem among them if you see among them the communities we'll be talking about two different types of such interactions one is competition and second thing is e symbiosis competition and symbiosis these are the two types of community interactions that we can see in an environment so first is competition competition is direct involvement of communities to fight against each other so community a will fight against community B why would they fight why would they end up in fight due to the availability of the resources that we say this community and community B then it was similar type of resource for example they require same type of food source or for their habitat so these are the things food source or habitat and these are the things that they require to survive and also different environmental factors that's not nothing for they're worried about but habitat and food are the major thing where the competition arise between two community if two communities have same food source so both of them try to gather that food so they'll end up in competition and every time if a competition is there there will be one winner and one loser every time in a competition so competition one will be superior and another one will be inferior the superior will win and the inferior will lose and in this case winning means in this case winning winning means the organism can leave and then organism we continue to live in that environment through the revolution so that organism will be a part of the evolution in future but while in the other case the inferior type of organisms will lose and that organism will lose that means the extinction of their organism from the ecosystem right so in in this case winning means evolution forward positive losing extinction backward negative not back what is negative this is one thing about competition and what kind of competition we can see let's say competition between a lion and tiger competition between a tiger and wolf for their food habit and their habitat that is a competition in competition both of them and fighting for something common that is the idea now second thing is symbiosis and if you talk about symbiosis of symbiotic relationship between different communities there are three types of symbiotic relationships that are possible one is mutualism mutualism where the mutual understanding between the community is second thing is commensalism and third is predation and parasitism and actually it is not about predation because predation is different I'm going to talk about that later separately predation does not belong to Simba's is actually predation is completely separate competition predation and symbiosis so in symbiosis we have three mutualism commensalism and parasitism and mutualism what is mutualism mutual as the term says two communities have a mutualistic Understanding between themselves so if i if i just erase this one and say mutualism there are two things let's say species our community a and species B from community two so now in mutualism what happens both of them get benefits due to their interactions in all these cases these are interactions of the organisms in any sort of interaction mutualism means they have a positive interaction with each other that means species and species B they follow a positive interaction that miss PC is a health species B behaves a that is the idea so I can put plus to both of them that is mutualism example there were plenty of examples out the very common example including human being is that we have got my club microflora right we have the micro flora in our in our intestine those micro flora like Escherichia coli or bifidobacteria they tend to stay there and they live there right and once they leave they have when they provide some important things to us and they get nutrient source from us we get calcium and vitamin K from bacteria in our gut they help us to prevent against such different kinds of infections that is a positive sight from both of us and we give the nutritions to them for them to leave second thing is a commensalism incoming cyl ism one particular type of organism get benefit while the other is unharmed so I can write it here for example a gets when if it's B is unharmed so we can put a zero it's not hung unmoved untouched B does not get any extra advantage a get the advantage but B is unharmed example is that sometimes some type of arthropods leaving our I or I'll AI leads are in this regions this is one kind of example or this is one example of this so those those organisms those those arthropods they live there but they actually get benefits because the oil because you know if you look at the eyelash here is coming from the eyelash and at that point there are there's there is a home for that specific type of arthropods who live there and like like specific type I don't remember the exact name of that organism now but there is a kind of arthropod very small tiny now they get all the nutrient source from the oil that is deposited there so they get this when they get this things and they nourish nourish themselves on the other hand a species B is not getting any benefit that is asked we are not getting any benefit from them but they are not harming us that means they are not destroying our eye or anything like that so this is a commensalism now the third type parasitism parasitism realize the fact that in this case one organism is getting the benefit while other is harmed so one species is getting benefit by harming other species an example is you know not kind of leeches if you see the leeches they will go here and they will attach to our skin they will take blood from us so they are getting the benefit they are getting nutrients through blood but we are actually harmed due to this blood sucking from us that is a case for parasitism as well as there are multiple examples like you know roundworms hookworms that are present in our body if they present they get some nutrient source from our body but we are not getting anything from them and actually we are harmed because they tend to bind with specific tissues of our body are they they tend to get nutrients so they are getting some negative effect in our body this is the example for parasitism so these are all examples mutualism commensalism and parasitism and this is the typical structure of that there are multiple more but these are the main three types of symbiosis but one thing remains that is a predation so what is predation in predation in predation what we talked about is completely different it does not belong to see my assists oh I put it round here but predation means while organism a feed on organism B F feeds on B so species rely on all other species for food source so just like say wolf is eating rabbit right this is so wolf a eating rabbit so wolf population depends on the population of rabbit because if there is rabbit wolf can eat them and can grow so that is predation so these are the different kinds of interactions that we can see and I hope this video helps you to understand the community interactions in ecosystem if you liked this video please hit the like button share this video with your friends in all social media accounts and definitely subscribe to my channel to get more and more videos like this so thank you all the rest

27 thoughts on “Community interactions – competition, predation, symbiosis

  1. You are correct but a population is many different organisms of THE SAME SPECIES. Also there are 3 relationships in an ecosystem. Predator|Prey, Symbiosis, and Consumer|Producer. Other than that great video.

  2. Sir in ncert it is told that in competition both the species are harmed. The sign is minus for both the species. How?

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