| 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. |
| Supplementary Notes |
Pub. in Proceedings of the International Symposium of Experimental Manipulations of Biota and Biogeochemical Cycling in Ecosystems, Copenhagen, Denmark, May 1992. Prepared in cooperation with New Hampshire Univ., Durham. Complex Systems Research Center. Sponsored by Corvallis Environmental Research Lab., OR., and National Science Foundation, Washington, DC. |
| NTIS Title Notes |
Symposium paper. |
| Category Codes |
68D; 48E; 48G; 48D; 57H; 57C |
| NTIS Prices |
PC A02/MF A01 |
| Primary Description |
600/02 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
307031244 |
| Origin |
NTIS |
| Type |
CAT |
