While explaining interspecific interaction of population, (+)sign is assigned for beneficial interaction, (−) sign is assigned for detrimental interaction and (0) for neutral interaction. Which of the following interactions can be assigned (+) for one species and (−) for another species involved in the interaction?
Amensalism
Commensalism
Competition
Predation
(+) Sign indicates the population is benefitted
(-) Sign indicates the population is harmed
(0) sign indicates no effect on the population
In predation, one species is benefitted and the other is harmed. It is (+-) type of population interaction.
In anmensalism, one species is neutral where the other species is harmed. It is (0 -) type of population interaction.
In Commensalism, One species is benefited whereas the other species is neutral. It is (+0) type of population interaction.
In competition, both the species are harmed. It is (- -) type of population interaction.
Hence the correct option is (4).