Comprehensive multiyear carbon budget of a temperate headwater stream
نویسندگان
چکیده
منابع مشابه
Carbon isotope fractionation of dissolved inorganic carbon (DIC) due to outgassing of carbon dioxide from a headwater stream
The stable isotopic composition of dissolved inorganic carbon (υ13C-DIC) was investigated as a potential tracer of streamflow generation processes at the Sleepers River Research Watershed, Vermont, USA. Downstream sampling showed υ13C-DIC increased between 3–5‰ from the stream source to the outlet weir approximately 0Ð5 km downstream, concomitant with increasing pH and decreasing PCO2. An incre...
متن کاملGrazer traits, competition, and carbon sources to a headwater-stream food web.
We investigated the effect of grazing by a dominant invertebrate grazer (the caddisfly Glossosoma penitum) on the energy sources used by other consumers in a headwater-stream food web. Stable isotope studies in small, forested streams in northern California have shown that G. penitum larvae derive most of their carbon from algae, despite low algal standing crops. We hypothesized that the caddis...
متن کاملConcentration of Nitrogen in a Forested Headwater Stream in Japan
The balance between nitrogen loading and runoff in the forested headwater streams of the Kanna River was estimated to elucidate the current status of nitrogen saturation in a forested watershed. NO3-N concentration in the study area was far higher than the average value in Japan. Estimated nitrogen runoff accounted for 55–57% of nitrogen loading; suggesting that the forest’s nitrogen retention ...
متن کاملNitrification rates in a headwater stream: influences of seasonal variation
Nitrification, the chemoautotrophic process by which NH4-N is converted to NO,-N, is an integral biogeochemical transformation in stream ecosystems. Previous research has shown that experimental addition of dissolved organic C inhibits rates of nitrification, and that NH4-N addition stimulates rates of nitrification. In many streams, large amounts of C and N may be present in particulate and so...
متن کاملEstimating the carbon budget and maximizing future carbon uptake for a temperate forest region in the U.S.
BACKGROUND Forests of the Midwest U.S. provide numerous ecosystem services. Two of these, carbon sequestration and wood production, are often portrayed as conflicting. Currently, carbon management and biofuel policies are being developed to reduce atmospheric CO2 and national dependence on foreign oil, and increase carbon storage in ecosystems. However, the biological and industrial forest carb...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research: Biogeosciences
سال: 2016
ISSN: 2169-8953,2169-8961
DOI: 10.1002/2015jg003050