Zooplankton Diversity and Biomass in Recently Acidified Lakes

1983 ◽  
Vol 40 (1) ◽  
pp. 36-42 ◽  
Author(s):  
John L. Confer ◽  
Thomas Kaaret ◽  
Gene E. Likens

Ten small headwater lakes in the Adirondack Mountains of New York State and 10 in the White Mountains of New Hampshire were examined for possible effects of acidification on zooplankton. The results showed that acidification, or some close correlate, had a significant negative effect on zooplankton diversity and biomass. A loss of 2.4 species of zooplankton and 22.6 mg dry wt/m2 was correlated with each unit decrease in pH. These results, in contrast to some previous work, show a continuous decrease in diversity and biomass over the entire range of pH in the sampled lakes, 4.5–7.2. Cladocera, with the exception of Holopedium and Polyphemus, and Epischura lacustris, Mesocyclops edax, and Cyclops scutifer, were abundant at higher pH values but rare or absent at pH values less than 5. Diaptomus minutus was predominant at pH values less than 5.Key words: acid rain, lakes, Adirondack Mountains, White Mountains, zooplankton, Cladocera, Epischura, Mesocyclops, Cyclops, Diaptomus

1989 ◽  
Vol 46 (2) ◽  
pp. 268-276 ◽  
Author(s):  
Ward W. Staubitz ◽  
Phillip J. Zarriello

Cranberry Pond and Woods Lake are small, acidic headwater lakes in the west-central Adirondack region of New York State. The lakes differ in size and depth but have similar watershed characteristics. Both watersheds contain thin eolian and sandy till deposits overlying granitic gneiss and have limited capacity to store and transmit groundwater. Total lake inflow was calculated as a residual of a monthly hydrologic balance based on measured precipitation, lake outflow, change in lake storage, and estimated evaporation; surface-water and groundwater inflow to each lake also were estimated. Results indicate that the lakes are hydrologically similar and are dominated by surface-water systems with highly variable runoff that responds rapidly to precipitation. Groundwater, which constituted about 16% of the total inflow to Cranberry Pond and from 31 to 38% of the total inflow to Woods Lake in 1984–86, moves through a shallow flow system that provides little stabilizing influence on the hydrology or water chemistry of the lakes. Error analysis of the hydrologic balance indicated that total annual inflow, calculated as a residual of the hydrologic balance, is accurate to within 12%. Calculated monthly inflow values are subject to greater potential error that ranges up to 46%.


Author(s):  
Julie Nicoletta

Arriving in the colony of New York in 1774 from England, Ann Lee and her eight followers set about creating a model communal society in what would become the United States. Officially known as the United Society of Believers in Christ’s Second Appearing, the Shakers believed in Christ’s imminent return. Their support of pacifism, near equality between the sexes that allowed women to take on leadership roles, and perfectionism set them apart from most Americans. Within a decade, they had begun creating a Kingdom of Heaven on Earth through their worship, work ethic, and construction of orderly villages with buildings and furniture meant to reinforce religious belief and shape and control behavior. From humble beginnings, the sect created a total of twenty-two communities beginning in the 1780s, spreading from Maine to Indiana and as far south as Georgia and Florida, though these latter two sites and the one in Indiana were short lived. During periods of religious revivalism in the United States in the late 18th and early19th centuries, the Shakers attracted hundreds of converts who gave up their worldly possessions to live celibate, communal lives. After a peak population of over three thousand in the1840s, the Shakers have dwindled to just three members inhabiting the only surviving living community of Sabbathday Lake, near New Gloucester, Maine. The Shakers’ demographic and economic success over several decades left a legacy of buildings at numerous locations throughout the eastern United States. Some of these villages have become museum sites, most notably Hancock, Massachusetts; Mount Lebanon, New York; Canterbury, New Hampshire; and Pleasant Hill and South Union, both in Kentucky. Other Shaker buildings remain as private residences and parts of retirement communities and state prisons. In many ways, Shaker architecture reflects contemporary regional vernacular building practices, such as the closely spaced anchor bents in the framing of the earliest meetinghouses in Connecticut, New Hampshire, Maine, Massachusetts, and eastern New York State, and the rather grand masonry structures of the dwelling houses and trustees’ offices in Kentucky. The linear arrangement of buildings, their large size, and separate entrances for men and women distinguished Shaker buildings from those of the outside world, though stylistically they appeared much like non-Shaker buildings. The Shakers organized building interiors to use space efficiently with many built-in cabinets and drawers, installed pegboards on walls for storage and to help keep floors clear for cleaning, and included separate staircases to demarcate men’s and women’s areas. The buildings, especially the meetinghouses and dwelling houses, reminded Shakers of their commitment to their faith and to their distinctive way of living and encouraged them to “put their hands to work and their hearts to God,” a saying attributed to Ann Lee. Nevertheless, the Shakers were not immune from influences from the outside world. They needed to interact with outsiders to encourage the economic success of their villages and to attract converts. As their population shrank in the latter half of the 19th century, they turned increasingly to hired help to assist with building construction and other aspects of daily life. The Shakers also embraced stylistic changes in architecture and furniture; their buildings of the late 19th and early 20th centuries reflect these influences with added ornamentation inside and out, as well as embellished furnishings either made by the Shakers or purchased from non-Shaker furniture makers. Rather than undercut any appreciation of the simple style for which the Shakers are best known, these changes show the group as always practical and responsive to changes in mainstream society.


1985 ◽  
Vol 22 (2) ◽  
pp. 141-153 ◽  
Author(s):  
S. L. Klemperer ◽  
L. D. Brown ◽  
J. E. Oliver ◽  
C. J. Ando ◽  
B. L. Czuchra ◽  
...  

COCORP deep seismic reflection profiling in the Adirondack Mountains of northern New York State has revealed a prominent zone of layered reflectors in the lower crust of the east-central Adirondacks. The strong, layered reflectors (here termed the Tahawus complex) occur between 18 and 26 km depth, beneath the sparsely reflective, granulite-grade, surface terrane, which has been uplifted from depths greater than 20 km. The Tahawus complex apparently represents layered rocks of some type in the lower crust of the Adirondacks. Possibilities include gneissic layering, cumulate igneous layering, a layered sill complex, and underthrust sedimentary strata, The Tahawus complex may be spatially coincident with a previously detected, high-conductivity zone in the lower crust, suggesting that either unusual mineralogies or interstitial electrolytes are present in the Tahawus complex. In contrast to layered reflections discovered in the lower crust of the east-central Adirondacks and southeast of the Adirondacks, cross-cutting and discontinuous reflections are recorded from the upper crust on all the COCORP Adirondack lines, including lines in both the Adirondack Highlands and Lowlands. Available three-dimensional control suggests that reflections in the upper crust of the central Adirondacks are parallel to, and hence may be related to, the folded gneisses mapped at the surface. Shallow events are also observed on a COCORP profile close to the epicenter of the 7 October 1983 magnitude 5.2 earthquake in the central Adirondacks, but their relation to the earthquake is uncertain.


2003 ◽  
Vol 9 (11) ◽  
pp. 1602-1619 ◽  
Author(s):  
Ji-Hyung Park ◽  
Myron J. Mitchell ◽  
Patrick J. McHale ◽  
Sheila F. Christopher ◽  
Tilden P. Meyers

1987 ◽  
Vol 44 (9) ◽  
pp. 1595-1602 ◽  
Author(s):  
James N. Galloway ◽  
George R. Hendrey ◽  
Carl L. Schofield ◽  
Norman E. Peters ◽  
Arland H. Johannes

The surface and outlets of two headwater lakes acidified during the 1978, 1979, and 1980 spring snowmelt periods. The decrease in pH was accompanied by an increase in nitrate whereas the other strong acid anion, SO42−, remained relatively constant. Chemical mass-balance calculations, using data from the Integrated Lake–Watershed Acidification Study, indicate that the peak in acidification observed in the Adirondack Mountains in the spring is caused by (1) a dilution of base cations (Ca2+, Mg2+, Na+, and K+) and associated alkalinity by snowmelt, (2) an increase in NO3− concentration in the acidified portion of the lakes, and (3) the constant elevated concentration of SO42−. At Woods Lake, the NO3− that accumulated in the snowpack plus that deposited from the atmosphere during snowmelt was sufficient to account for the increased NO3− in and transported from the lake. At Panther Lake, an additional source of NO3− was needed and was believed to be contributed by nitrification in the upper soil horizons. If atmospheric deposition of sulfur is reduced, low-alkalinity systems like Woods and moderate-alkalinity systems like Panther will be less likely to develop strong acidity during spring acidification.


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