| Main Title |
Biological Sinks for Nitrogen Additions to a Forested Catchment. |
| Author |
Nadelhoffer, K. J. ;
Aber, J. D. ;
Downs, M. R. ;
Fry, B. ;
Melillo, J. M. ;
|
| CORP Author |
Marine Biological Lab., Woods Hole, MA. Ecosystems Center. ;New Hampshire Univ., Durham. Complex Systems Research Center.;Corvallis Environmental Research Lab., OR.;National Science Foundation, Washington, DC. |
| Publisher |
c1992 |
| Year Published |
1992 |
| Report Number |
NSF-BSR90-09190; EPA/600/A-92/292; |
| Stock Number |
PB93-141174 |
| Additional Subjects |
Watersheds ;
Nitrogen ;
Biological effects ;
Water pollution effects ;
Soil surveys ;
Forests ;
Bear Brook ;
Maine ;
Tracer techniques ;
Ecosystems ;
Plant growth ;
Trees(Plants) ;
Deposition ;
Water quality ;
Ecosystems ;
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB93-141174 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
9p |
| Abstract |
The goal of our research is to identify and quantify sinks for experimental Nitrogen (N) additions to a forested catchment at the Bear Brooks Watershed in Maine (BBWM) where background N deposition rates are low (< 4 kg/ha/yr). Nitrogen applied to the watershed in April, June, August and October (16.8 kg/ha) 1991 was labeled with a (15)N tracer that increased the abundance of (15)N label from about 0.3663 atm % to 0.4366 atm %. Surface soil was the most important sink for the isotopically labelled N additions. We estimate using (15)N mass balancing that about 3/4 of the 16.8 kg N added during the 1991 growing season was retained in catchment soil and aboveground vegetation with soils being the dominant sink. |
