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Ecohydrology
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| In
semiarid landscapes, ecological and hydrological processes
are tightly interrelated. For example, plant community
patterns and ecosystem processes are highly dependent on
soil water availablity, while runoff is highly dependent
on heterogeneity in ground cover. The nature of these
interrelationships depends on spatial scale. Our approach
to understanding and quantifying these interrelationships
has been to identify functional units that are
hypothesized to differ with respect to ecological /
hydrological processes. |
Runoff Scales
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Hypotheses
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For
example, we have compiled a set of hypotheses about runoff
as a function of spatial scale. We are currently testing
these hypotheses, as well as others dealing with
ecological and hydrological relationships. |
| The
amount of water available to plants has a large effect on
the plant community. A sufficient amount of water is
required for existence of semiarid woodlands and forests.
Simultaneously, the trees within semiarid woodlands and
forests influence the spatial patterns of soil moisture,
as evident in this photo highlighting interception of
snowfall. |
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Runoff
is highly dependent on vegetation patterns, particularly
at small spatial scales corresponding to bare patches,
grassy patches, and tree canopy patches. |
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Terrestrial
Ecology Lab
228
Biological Science Building East
University
of Arizona, 1311 E 4th Street, Tucson, AZ 85721
Ph:
520-621-7259
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