Q: Kauffman and his colleagues (1993) estimated that burning the tropical
Kauffman and his colleagues (1993) estimated that burning the tropical forest at their study site resulted in the loss of approximately 21 kg per hectare of phosphorus. This quantity is about 11% to 1...
See AnswerQ: The fynbos of South Africa is famous for the exceptional diversity of
The fynbos of South Africa is famous for the exceptional diversity of its plant community. Witkowski (1991) showed that invading Acacia are enriching the fynbos soil with nitrogen. How might enriching...
See AnswerQ: McNaughton, Ruess, and Seagle (1988) proposed that grazing
McNaughton, Ruess, and Seagle (1988) proposed that grazing by large mammals increases the rate of nitrogen cycling on the savannas of East Africa. Explain how passing through a large mammal could incr...
See AnswerQ: Likens and Bormann (1995) found that vegetation substantially influences the
Likens and Bormann (1995) found that vegetation substantially influences the rate of nutrient loss from small stream catchments in the northern hardwood forest ecosystem. How do vegetative biomass and...
See AnswerQ: Many rivers around the world have been straightened and deepened to improve
Many rivers around the world have been straightened and deepened to improve conditions for navigation. Side effects of these changes include increased average water velocity and decreased movement of...
See AnswerQ: Melillo, Aber, and Muratore (1982) suggested that soil
Melillo, Aber, and Muratore (1982) suggested that soil fertility may influence the rate of decomposition in terrestrial ecosystems. Design an experiment to test this hypothesis. If you test for the ef...
See AnswerQ: Review figure 18.2, in which Rosenzweig (1968)
Review figure 18.2, in which Rosenzweig (1968) plotted the relationship between actual evapotranspiration and net primary production. How do you think that decomposition rates change across the same e...
See AnswerQ: Parmenter and Lamarra (1991) studied decomposition of fish and waterfowl
Parmenter and Lamarra (1991) studied decomposition of fish and waterfowl carrion in a freshwater marsh. During the course of their studies they found that the soft tissues of both fish and waterfowl d...
See AnswerQ: Of all the naturally occurring elements in the biosphere, why have
Of all the naturally occurring elements in the biosphere, why have the cycles of carbon, nitrogen, and phosphorus been so intensively studied by ecologists? (Hint: Think about the kinds of organic mol...
See AnswerQ: What is genetic drift? Under what circumstances do you expect genetic
What is genetic drift? Under what circumstances do you expect genetic drift to occur? Under what circumstances is genetic drift unlikely to be important? Does genetic drift increase or decrease geneti...
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