BY PETER D. MOORE
Department of Biology
King’. College
" The fact that C4 plants are richer in 13C than C3 plants can be used to study pest diets of animals by analyzing their bones or shells. Fossil snails, dating from about 3,000 to 4,000 years ago in the northern Negev Israel, provide evidence for a more southerly distribution of C3 plants at that time, implying moister conditions.
G.A. Goodfriend, “Mid-Holocene rainfall in the Negev desert from “C of land snail shell organic matter,” Nature, 333 (6175), 757-60, 23 June 1988. " Orthodox successional theory predicts that the rain forest should be dominated by shade-tolerant species, but their rates of regeneration and spread are so low, and wildflres are so frequent, that this state is never fully reached The canopy is therefore dominated by those tree species that first arrive after the creation of a gap.
J. Read, K.S. Hill, ...
