Energy and Ecology
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Ecology
Research on ecology described by scientists at University of Queensland
January 7th, 2008
"Two hypotheses have been proposed to explain increases in plant nitrogen (N) and phosphorus (P) concentrations with latitude: (i) geochemical limitation to P availability in the tropics and (ii) temperature driven variation in growth rate, where greater growth rates (requiring greater nutrient levels) are needed to complete growth and reproduction within shorter growing seasons in temperate than tropical climates. These two hypotheses were assessed in one forest type, intertidal mangroves, using fertilized plots at sites between latitudes 36O S and 27O N. The N and P concentrations in mangrove leaf tissue increased with latitude, but there were no trends in N : P ratios," scientists in...
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Source: Energy and Ecology (2008-01-07)
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