Seston sedimentation in Mirror Lake, New Hampshire, and its relationship to long-term sediment accumulation

1978 ◽  
Vol 20 (1) ◽  
pp. 525-530 ◽  
Author(s):  
Robert E. Moeller ◽  
Gene E. Likens
Keyword(s):  
New Hampshire ◽  
Sediment Accumulation ◽  
Mirror Lake

Delineating a road-salt plume in lakebed sediments using electrical resistivity, piezometers, and seepage meters at Mirror Lake, New Hampshire, U.S.A

Geophysics ◽  
2010 ◽  
Vol 75 (4) ◽  
pp. WA75-WA83 ◽  
Author(s):  
Laura Toran ◽  
Melanie Johnson ◽  
Jonathan Nyquist ◽  
Donald Rosenberry
Keyword(s):  
Electrical Resistivity ◽  
New Hampshire ◽  
Chloride Concentration ◽  
Road Salt ◽  
Small Stream ◽  
Inlet Stream ◽  
Seepage Meters ◽  
Mirror Lake ◽  
Seepage Meter

Electrical-resistivity surveys, seepage meter measurements, and drive-point piezometers have been used to characterize chloride-enriched groundwater in lakebed sediments of Mirror Lake, New Hampshire, U.S.A. A combination of bottom-cable and floating-cable electrical-resistivity surveys identified a conductive zone [Formula: see text] overlying resistive bedrock [Formula: see text] beneath the lake. Shallow pore-water samples from piezometers in lakebed sediments have chloride concentrations of [Formula: see text], and lake water has a chloride concentration of [Formula: see text]. The extent of the plume was estimated and mapped using resistivity and water-sample data. The plume ([Formula: see text] wide and at least [Formula: see text] thick) extends nearly the full length and width of a small inlet, overlying the top of a basin formed by the bedrock. It would not have been possible to mapthe plume’s shape without the resistivity surveys because wells provided only limited coverage. Seepage meters were installed approximately [Formula: see text] from the mouth of a small stream discharging at the head of the inlet in an area where the resistivity data indicated lake sediments are thin. These meters recorded in-seepage of chloride-enriched groundwater at rates similar to those observed closer to shore, which was unexpected because seepage usually declines away from shore. Although the concentration of road salt in the northeast inlet stream is declining, the plume map and seepage data indicate the groundwater contribution of road salt to the lake is not declining. The findings demonstrate the benefit of combining geophysical and hydrologic data to characterize discharge of a plume beneath Mirror Lake. The extent of the plume in groundwater beneath the lake and stream indicate there will likely be a long-term source of chloride to the lake from groundwater.

Climatic data for Mirror Lake, West Thornton, New Hampshire: 1985

1988 ◽  
Author(s):  
Alex M. Sturrock ◽  
D.C. Buso ◽  
J.L. Scarborough ◽  
T.C. Winter
Keyword(s):  
New Hampshire ◽  
Climatic Data ◽  
Mirror Lake

Biological sediment mixing and its stratigraphic implication in Mirror Lake (New Hampshire, U. S. A.)

1984 ◽  
Vol 22 (1) ◽  
pp. 567-572 ◽  
Author(s):  
Robert E. Moeller ◽  
Frank Oldfield ◽  
Peter G. Appleby
Keyword(s):  
New Hampshire ◽  
Mirror Lake ◽  
Sediment Mixing

Seasonal changes in biomass, tissue chemistry, and net production of the evergreen hydrophyte, Lobelia dortmanna

1978 ◽  
Vol 56 (12) ◽  
pp. 1425-1433 ◽  
Author(s):  
Robert E. Moeller
Keyword(s):  
New Hampshire ◽  
Seasonal Changes ◽  
P Uptake ◽  
Depth Limit ◽  
Net Production ◽  
Mirror Lake ◽  
Growth Requirements ◽  
Leaf Turnover ◽  
Nutrient Conservation ◽  
Tissue Chemistry

The evergreen characteristic of Lobelia dortmanna L. involves biomass and nutrient conservation. Although 60% of the maximum, midsummer biomass overwinters, little or no new tissue is produced between October and early May. Annual net production, estimated from the rate of leaf turnover, is less than the maximum biomass (P/B = 0.69 per year). Nitrogen and P concentrations are lowest in mid-August, when the amount of each analyzed element per square metre is near its maximum (N, P, Ca, Mg, Na, K). Autumnal uptake of N may contribute 25% of the next season's growth requirements, but P uptake is largely offset by losses during the winter. Fruiting and sterile plants have similar contents of N, P, and K in late July, but the fruiting plants are richer in Ca, Mg, Na, Fe, Mn, and Zn. At the maximum depth limit of the population in Mirror Lake, New Hampshire (2.3 m), flowering is absent and seedlings are sparse, suggesting reproductive failure as a controlling factor at the margin of the population.

Long-Term Trends in the Occurrence of Disseminated Neoplasia in a Population of Mya arenaria (Softshell Clam) from a New Hampshire Estuary

2021 ◽  
Vol 28 (2) ◽  
Author(s):  
Paul Geoghegan ◽  
Jamie O'Brien ◽  
Charles W. Walker ◽  
MacKenzie Heagy ◽  
S. Anne Böttger
Keyword(s):  
New Hampshire ◽  
Mya Arenaria ◽  
Long Term Trends ◽  
Softshell Clam

scholarly journals Climatic data for Mirror Lake, West Thornton, New Hampshire, 1981-82

1984 ◽  
Author(s):  
A.M. Sturrock ◽  
D.C. Buso ◽  
G.M. Bieber ◽  
L.G. Engelbrecht ◽  
T.C. Winter
Keyword(s):  
New Hampshire ◽  
Climatic Data ◽  
Mirror Lake

scholarly journals Successional dynamics of a 35 year old freshwater mitigation wetland in southeastern New Hampshire

PLoS ONE ◽  
2021 ◽  
Vol 16 (5) ◽  
pp. e0251748
Author(s):  
J. Grant McKown ◽  
Gregg E. Moore ◽  
Andrew R. Payne ◽  
Natalie A. White ◽  
Jennifer L. Gibson
Keyword(s):  
Species Composition ◽  
New Hampshire ◽  
Wetland Restoration ◽  
Wetland Mitigation ◽  
Freshwater Wetland ◽  
Compensatory Mitigation ◽  
Avian Community ◽  
Long Term Monitoring ◽  
Term Monitoring

The long-term ecological success of compensatory freshwater wetland projects has come into question based on follow-up monitoring studies over the past few decades. Given that wetland restoration may require many years to decades to converge to desired outcomes, long-term monitoring of successional patterns may increase our ability to fully evaluate success of wetland mitigation projects or guide adaptive management when needed. In Portsmouth, New Hampshire a 4 ha wetland was constructed in an abandoned gravel quarry as off-site compensatory mitigation for impacts to a scrub-shrub swamp associated with property expansion. Building upon prior evaluations from 1992 and 2002, we conducted a floral survey in 2020 to compare results with prior surveys to document vegetation successional trends over time. In addition, we monitored the avian community throughout the growing season as a measure of habitat quality. The plant community mirrored documented successional trends of freshwater wetland restoration projects as native hydrophytes dominated species composition. Plant species composition stabilized as the rate of turnover, the measurement of succession, declined by nearly half after 17 years. Researchers should consider long-term monitoring of specific sites to better understand successional patterns of created wetlands as we documented long time frames required for the development of scrub-shrub swamps, red maple swamps, and sedge meadows. High species richness was attributed to beaver activity, topographic heterogeneity from Carex stricta tussocks, and the seed bank from the application of peat from the original wetland. Habitat heterogeneity of open water, herbaceous cover, and woody vegetation supports a diverse avian community including 11 wetland dependent species. Although the mitigation project has not created the full area of lost scrub-shrub swamp after 35 years, it has developed a structurally complex habitat and diverse avian community that effectively provides the functions and values of the impacted system.

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