Info

Species Interactions

I. Classes of Interactions

A. Competition

B. Predation

C. Symbiosis

II. Factors Affecting Interactions

A. Abiotic Conditions

B. Resource Availability and Distribution

C. Indirect Effects of Other Species

III. Consequences of Interactions

A. Population Regulation

B. Community Regulation

IV. Summary

JUST AS INDIVIDUALS INTERACT IN WAYS THAT AFFECT POPULATION structure and dynamics, species populations in a community interact in ways that affect community structure and dynamics. Species interactions vary considerably in their form, strength, and effect and often are quite complex. One species can influence the behavior or abundance of another species directly (e.g., a predator feeding on its prey) or indirectly through effects on other associated species (e.g., an herbivore inducing production of plant chemicals that attract predators or deter feeding by herbivores arriving later). The web of interactions, direct and indirect and with positive or negative feedbacks, determines the structure and dynamics of the community (see Chapters 9 and 10) and controls rates of energy and matter fluxes through ecosystems (see Chapter 11).

Insects have provided rich fodder for studies of species interactions. Insects are involved in all types of interactions, as competitors, prey, predators, parasites, commensals, mutualists, and hosts. The complex and elaborate interactions between insect herbivores and host plants and between pollinators and their hosts have been among the most widely studied. Our understanding of plant-herbivore, predator-prey, animal-fungus, and various symbiotic interactions is derived largely from models involving insects. This chapter describes the major classes of interactions, factors that affect these interactions, and consequences of interactions for community organization.

Oplan Termites

Oplan Termites

You Might Start Missing Your Termites After Kickin'em Out. After All, They Have Been Your Roommates For Quite A While. Enraged With How The Termites Have Eaten Up Your Antique Furniture? Can't Wait To Have Them Exterminated Completely From The Face Of The Earth? Fret Not. We Will Tell You How To Get Rid Of Them From Your House At Least. If Not From The Face The Earth.

Get My Free Ebook


Post a comment