Skip to Main Content
Watershed Nitrogen and Mercury Geochemical Fluxes Integrate Landscape Factors in Long-term Research Watersheds at Acadia National Park, Maine, USAAuthor(s): J. S. Kahl; S. J. Nelson; I. Fernandez; T. Haines; S. Norton; G. B. Wiersma; G. Jacobson; A. Amirbahman; K. Johnson; M. Schauffler; L. Rustad; K. Tonnessen; R. Lent; M. Bank; J. Elvir; J. Eckhoff; H. Caron; P. Ruck; J. Parker; J. Campbell; D. Manski; R. Breen; K. Sheehan; A. Grygo
Source: Environmental Monitoring and Assessment
Publication Series: Scientific Journal (JRNL)
Station: Northern Research Station
Download Publication (481.0 KB)
DescriptionThis paper is an overview of this special issue devoted to watershed research in Acadia National Park (Acadia NP). The papers address components of an integrated research program on two upland watersheds at Acadia NP, USA (44° 20′ N latitude; 68° 15′ E longitude). These watersheds were instrumented in 1998 to provide a long-term foundation for regional ecological and watershed research. The research was initiated as part of EPA/NPS PRIMENet (Park Research and Intensive Monitoring of Ecosystems Network), a system of UV-monitoring stations and long-term watershed research sites located in US national parks. The initial goals at Acadia NP were to address research questions about mercury, acid rain, and nitrogen saturation developed from prior research. The project design was based on natural differences in forests and soils induced by an intense wildfire in one watershed in 1947. There is no evidence of fire in the reference watershed for several hundred years. We are testing hypotheses about controls on surface water chemistry, and bioavailability of contaminants in the contrasting watersheds. The unburned 47-ha Hadlock Brook watershed is 70% spruce-fir mature conifer forest. In contrast, burned 32-ha Cadillac Brook watershed, 4 km northeast of the Hadlock watershed, is 20% regenerating mixed northern hardwoods and 60% shrub/rocky balds. Differences in atmospheric deposition are controlled primarily by forest stand composition and age. The watersheds are gauged and have water chemistry stations at 122 m (Cadillac) and 137 m (Hadlock); watershed maximum elevations are 468 and 380 m, respectively. The stream water chemistry patterns reflect, in part, the legacy of the intense fire, which, in turn, controls differences in forest vegetation and soil characteristics. These factors result in higher nitrogen and mercury flux from the unburned watershed, reflecting differences in atmospheric deposition, contrasting ecosystem pools of nitrogen and mercury, and inferred differences in internal cycling and bioavailabilty.
- Check the Northern Research Station web site to request a printed copy of this publication.
- Our on-line publications are scanned and captured using Adobe Acrobat.
- During the capture process some typographical errors may occur.
- Please contact Sharon Hobrla, email@example.com if you notice any errors which make this publication unusable.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationKahl, J.S.; Nelson, S.J.; Fernandez, I.; Haines, T.; Norton, S.; Wiersma, G.B.; Jacobson, G.; Amirbahman, A.; Johnson, K.; Schauffler, M.; Rustad, L.; Tonnessen, K.; Lent, R.; Bank, M.; Elvir, J.; Eckhoff, J.; Caron, H.; Ruck, P.; Parker, J.; Campbell, J.; Manski, D.; Breen, R.; Sheehan, K.; Grygo, A. 2007. Watershed Nitrogen and Mercury Geochemical Fluxes Integrate Landscape Factors in Long-term Research Watersheds at Acadia National Park, Maine, USA. Environmental Monitoring and Assessment. 126(1-3): 9-25. https://doi.org/10.1007/s10661-006-9328-0.
Keywordswatershed science, hydrology, mass balances, mercury, acidic deposition, nitrogen, forest health, paleoecology, forest fire, Acadia National Park
- Using high-frequency sampling to detect effects of atmospheric pollutants on stream chemistry
- Evaluating the source of streamwater nitrate using d15N and d18O in nitrate in two watersheds in New Hampshire, USA
- Air pollution and watershed research in the central Sierra Nevada of California: nitrogen and ozone
XML: View XML