Coarse particulate organic matter dynamics in ephemeral tributaries of a Central Appalachian stream network
| Autor: | Brent R. Johnson, Christopher D. Barton, Ken M. Fritz, Gregory J. Pond |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Fluvial 010603 evolutionary biology 01 natural sciences deposition Article storage Tributary medicine ephemeral tributary Ecology Evolution Behavior and Systematics Hydrology geography leaf litter geography.geographical_feature_category Ecology seasonality 010604 marine biology & hydrobiology Aquatic ecosystem Ephemeral key Seasonality Plant litter medicine.disease Deposition (aerosol physics) connectivity transport Environmental science lag function Surface runoff wood |
| Zdroj: | Ecosphere (Washington, D.C) |
| ISSN: | 2150-8925 |
| Popis: | Headwater ephemeral tributaries are interfaces between uplands and downstream waters. Terrestrial coarse particulate organic matter (CPOM) is important in fueling aquatic ecosystems; however, the extent to which ephemeral tributaries are functionally connected to downstream waters through fluvial transport of CPOM has been little studied. Hydrology and deposition of leaf and wood, and surrogate transport (Ginkgo biloba leaves and wood dowels) were measured over month-long intervals through the winter and spring seasons (6 months) in 10 ephemeral tributaries (1.3-5.4 ha) in eastern Kentucky. Leaf deposition and surrogate transport varied over time, reflecting the seasonality of litterfall and runoff. Leaf deposition was higher in December than February and May but did not differ from January, March, and April. Mean percent of surrogate leaf transport from the ephemeral tributaries was highest in April (3.6% per day) and lowest in February (2.5%) and May (2%). Wood deposition and transport had similar patterns. No CPOM measures were related to flow frequency. Ephemeral tributaries were estimated to annually contribute 110.6 kg AFDM·km-1·yr-1 of leaves to the downstream mainstem. Ephemeral tributaries are functionally connected to downstream waters through CPOM storage and subsequent release that is timed when CPOM is often limited in downstream waters. |
| Databáze: | OpenAIRE |
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