Q: Ecological succession has been compared to the development of an organism and
Ecological succession has been compared to the development of an organism and the climax community to a kind of superorganism. F. E. Clements (1916, 1936) was the best-known proponent of this idea, an...
See AnswerQ: When Mount St. Helens in Washington erupted in 1980, it
When Mount St. Helens in Washington erupted in 1980, it created a gradient in disturbance. In the pumice plains near the eruption, the devastation was almost total. The extent of disturbance was much...
See AnswerQ: In the studies of mechanisms underlying succession, ecologists have found a
In the studies of mechanisms underlying succession, ecologists have found a great deal of evidence for both facilitation and inhibition. However, they have found little evidence for the tolerance mode...
See AnswerQ: The rapid succession shown by the Sycamore Creek ecosystem is impressive.
The rapid succession shown by the Sycamore Creek ecosystem is impressive. How might natural selection influence the life cycles of the organisms living in Sycamore Creek? Imagine a creek that floods a...
See AnswerQ: In most studies of forest succession such as that of Reiners and
In most studies of forest succession such as that of Reiners and colleagues (1971) and Oosting (1942), researchers study succession by comparing sites of various ages. This approach is called a “space...
See AnswerQ: The successional studies in Sycamore Creek produced patterns of variation in diversity
The successional studies in Sycamore Creek produced patterns of variation in diversity that differed significantly from those observed during primary succession at Glacier Bay (see fig.&Ac...
See AnswerQ: Would you expect the number of species to remain indefinitely at the
Would you expect the number of species to remain indefinitely at the level shown in figure 20.7? Space on large, stable boulders in Sousa’s study site is dominated by the...
See AnswerQ: As we saw in figure 20.5, Johnston and Odum
As we saw in figure 20.5, Johnston and Odum (1956) documented substantial change in the richness of bird species in a successional sequence going from the earliest stages in which the pla...
See AnswerQ: Suppose you are a director of a captive breeding program for a
Suppose you are a director of a captive breeding program for a rare species of animal, such as Siberian tigers, which are found in many zoos around the world but are increasingly rare in the wild. Des...
See AnswerQ: If rates of decomposition are higher in ecosystems with higher nutrient availability
If rates of decomposition are higher in ecosystems with higher nutrient availability, how should nutrient enrichment affect rates of decomposition? Because of its effects on fungal diversity, could nu...
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