Are ecological relationships always beneficial to organisms involved

The answer is NO

Explanation:

In an ecosystem, organisms of the same or different species tend to interact with one another to form ecological relationships. An ecological relationship involving two organisms is known as SYMBIOSIS. Symbiosis is necessarily not always the one that benefits both organisms. Many at times, this relationship tends to be detrimental or neither beneficial nor harmful to other organisms involved in the relationship. Symbiosis are of the following main types: MUTUALISM, COMMENSALISM, PARASITISM.

Mutualism is a kind of symbiosis in which the two organisms involved benefit by their actions in the relationship. For example, the relationship between cattle and egret where the cattle provides food for the egret in form of ticks that feeds on the cattle's blood while the egret helps the cattle get rid of its annoying parasite.

COMMENSALISM is another type of symbiosis involving two organisms in which one benefits and the other neither loses nor gains. For example, shark and remora, where the remora gets fed by the remnant of the shark's food by attaching to it, while the shark gets nothing from the remora and loses nothing either.

PARASITISM is the symbiotic relationship in which one of the organism loses and the other benefits. For example, the tick and dog where the tick feeds on the blood of the dog by attaching to Its skin while the dog is being deprived of its necessary nutrient and begins to grow lean.