<Table> <Tr> <Td> </Td> <Td> This article includes a list of references, related reading or external links, but its sources remain unclear because it lacks inline citations . Please help to improve this article by introducing more precise citations . (July 2011) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This article includes a list of references, related reading or external links, but its sources remain unclear because it lacks inline citations . Please help to improve this article by introducing more precise citations . (July 2011) (Learn how and when to remove this template message) </Td> </Tr> <P> An ecological relationship is the relationship between an organism in its ecosystem . All organisms in an ecosystem are connected in one way or another . Each interaction depends on the one before it . Each population interacts with one another in a complex web of relations . Ecological relationships help better to describe how they are connected . </P> <P> There are ecological relationships in which two are oppositional and four are symbiotic . The oppositional relationships are predation and competition . The symbiotic relationships are mutualism, commensalism, amensalism, neutralism, cooperation and parasitism . </P>

What are relationships between species that are adapted to each other