Question

Table 1 below shows classic categories of direct effects in ecological communities. The sign(+, - , 0) represents the net effect of one species on the other species, either positive,negative, or neutral. Copy and complete the table

Answer 1

--> Many species share a habitat, and the interactions between them play a major role in regulating population growth and abundance.

The main types of interspecies interactions seen in ecological communuties are:

Mutualism: a long-term, close association between two species in which both partners benefit+ / +

Commensalism: a long-term, close association between two species in which one benefits and the other is unaffected+ / 0

Predation: a member of one species, predator, eats all or part of the body of a member of another species, prey+ / -

Herbivory: a special case of predation in which the prey species is a plant+ / -

Parasitism: a long-term, close association between two species in which one benefits and the other is harmed+ / -

Competition: organisms of two species use the same limited resource and have a negative impact on each other.- / -

Amensalism: it is the two-species interaction in which the impact of one species on the other is negative, but where there is no detectable impact of the second species on the first 0 / -