Ecology 6th Edition by Charles Krebs

تمرين 5

Compare and contrast the following statements of an evolutionist and an ecologist about species diversity and the stability of biological communities:
a. Simpson (1969, p. 175) states: "If indeed the earth's ecosystems are tending toward long-range stabilization or static equilibrium, three billion years has been too short a time to reach that condition."
b. Recher (1969, p. 79) states: "The avifaunas of forest and scrub habitats in the temperate zone of Australia and North America have reached equilibrium and are probably saturated."