Green world hypothesis of hairston smith and slobodkin hss. Predation and indirect effects in shaping ecological communities. Was an american ecologist. Smith and lawrence b. Community structure population control and competition.
The hss hypothesis the world is green today we read one of the seminal papers in all of ecology by hairston smith and slobodkin published in the american naturalist in 1960. Smith and lawrence b. Their results support the so called green world hypothesis first proposed in 1960 by hairston smith and slobodkin and seem to lay to rest the competing theory that plants protect themselves from being eaten through the physical and chemical defences they have developed. Their results support the so called green world hypothesis first proposed in 1960 by united states scientists nelson hairston frederick smith and lawrence slobodkin.
The green world hypothesis is credited with bringing attention to the role of top down forces eg. Start studying ecology herbivory predation. Problems with hss 1 often not supported experimentally 2 many plants are defended chemically and structurally cactus spines lignins kelp secondary compounds. The world is green nelson g.
World is green because it green isnt always edible. This paper is cited in every modern ecology text book. Despite being almost 50 years old the green world hypothesis has been almost impossible to test until now. The world is green hairston smith and slobodkin 1960 ecomotion studios.
This is often referred to as the green world hypothesis. Green world hypothesis fretwell 1977 oksanen 1981 explains deviations from hss by considering number of trophic levels. Hairston smith and slobodkin argued that predators reduce the abundance of herbivores allowing plants to flourish. Hairston is well known for his work in ecology and human disease.
Hairston ng smith fe slobodkin lb. Learn vocabulary terms and more with flashcards games and other study tools. The classic hss that is hairston smith and slobodkin paper addresses this central question of ecology head on discussing the factors that limit populations and illustrating a vibrant elegantly interacting system of plants herbivores predators and decomposers. Nelson was also deeply interested in the factors that control human disease and was an adviser to the world health organization for many years.
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