Journal
ANNUAL REVIEW OF ECOLOGY, EVOLUTION, AND SYSTEMATICS, VOL 45
Volume 45, Issue -, Pages 397-419Publisher
ANNUAL REVIEWS
DOI: 10.1146/annurev-ecolsys-120213-091650
Keywords
pulse-reserve paradigm; species interactions; state transitions; microbial processes
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Funding
- Direct For Biological Sciences
- Division Of Environmental Biology [1026865] Funding Source: National Science Foundation
- Direct For Biological Sciences
- Division Of Environmental Biology [1232294] Funding Source: National Science Foundation
- ARS [813350, ARS-0423561] Funding Source: Federal RePORTER
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Ecological processes in arid lands are often described by the pulse-reserve paradigm, in which rain events drive biological activity until moisture is depleted, leaving a reserve. This paradigm is frequently applied to processes stimulated by one or a few precipitation events within a growing season. Here we expand the original framework in time and space and include other pulses that interact with rainfall. This new hierarchical pulse-dynamics framework integrates space and time through pulse-driven exchanges, interactions, transitions, and transfers that occur across individual to multiple pulses extending from micro to watershed scales. Climate change will likely alter the size, frequency, and intensity of precipitation pulses in the future, and arid-land ecosystems are known to be highly sensitive to climate variability. Thus, a more comprehensive understanding of arid-land pulse dynamics is needed to determine how these ecosystems will respond to, and be shaped by, increased climate variability.
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