New Paltz, NY, United States
New Paltz, NY, United States

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Charifson D.M.,SUNY New Paltz | Charifson D.M.,State University of New York at Stony Brook | Huth P.C.,Mohonk Preserve | Thompson J.E.,Mohonk Preserve | And 3 more authors.
Northeastern Naturalist | Year: 2015

Lake acidification is a major problem in northeastern US lakes that can control fish presence or absence. We examined the history of fish populations in Lake Minnewaska, in eastern New York. We examined historical documents and found that Lake Minnewaska was fishless from 1922-2008 because of high lake-acidity. Following 30 years of recovery from acidic conditions, Notemigonus crysoleucas (Golden Shiner), a small minnow species, was introduced in 2008 and quickly proliferated, peaking at ∼15,000 individuals in 2013. In 2012, the piscivorous species Micropterus salmoides (Largemouth Bass) was introduced, and the minnow population was effectively removed by 2014. We present a conceptual model of the history of fish in Lake Minnewaska as fish disappeared and reappeared over 100 years as a consequence of acid rain and human introductions. © 2015, BioOne. All rights reserved.

Richardson D.C.,SUNY New Paltz | Charifson D.M.,SUNY New Paltz | Charifson D.M.,State University of New York at Stony Brook | Stanson V.J.,SUNY New Paltz | And 3 more authors.
Inland Waters | Year: 2016

Introductions of new species may rapidly and irreversibly change lake food webs and ecosystems, but such events are rarely documented as a result of inadequate pre-invasion monitoring. We examined the unintentional introduction of a fish species, golden shiner (Notemigonus crysoleucas), a small planktivorous minnow, to Lake Minnewaska, New York State, USA. We predicted that the introduction had caused a trophic cascade resulting in increased algal biomass and decreased water clarity mediated by decreasing zooplankton size and biomass. This prediction was confirmed using limited monitoring data through comparisons made between "control" lakes (both with fish in Mohonk Lake and without fish in Lake Awosting) and the "intervention" lake (Minnewaska). © International Society of Limnology 2016.

Cook B.I.,NASA | Cook B.I.,Lamont Doherty Earth Observatory | Cook E.R.,Lamont Doherty Earth Observatory | Anchukaitis K.J.,Lamont Doherty Earth Observatory | And 3 more authors.
Journal of Applied Meteorology and Climatology | Year: 2010

Reliable, long-term records of daily weather and climate are relatively rare but are crucial for understanding long-term trends and variability in extreme events and other climate metrics that are not resolvable at the monthly time scale. Here, the distinct features of a continuous, long-term (1896-2006) daily weather record from Mohonk Lake, New York, are highlighted. The site is optimal for daily climate analyses, since it has experienced negligible land-use change, no stationmoves, and has maintained methodological and instrumental consistency over the entire period of record. Unlike many sites, the site has always used maximum/minimum thermometers rather than shifting to the automated Maximum/Minimum Temperature Sensor. Notable results from the analysis of this record include 1) a warming trend driven largely by trends in maximum temperatures, especially during summer, 2) increasing diurnal temperature range during summer, and 3) a reduction in the number of freeze-days per year with little change in the length of the freeze-free season. These findings deviate from some regional level trends, suggesting there may be value in revisiting selected, consistently monitored, and maintained stations similar to Mohonk for focused analyses of regional climate change. © 2010 American Meteorological Society.

Southgate E.W.B.R.,Hood College | Thompson J.E.,Mohonk Preserve
Northeastern Naturalist | Year: 2014

Quercus spp. (oaks) were the most abundant trees in the pre-colonial forests of the Hudson Valley. Over the last century, secondary forests have replaced many of the agricultural fields that were established after these forests were cut. Mohonk Preserve's Foothills, New Paltz, NY, includes secondary forest stands ranging in age from about 30 to 100 y. Stands on similar substrates and soils differ not only in age, but also in the factors that influenced forest development at and since field abandonment such as seed sources and herbivory. This study analyzed the composition of 8 stands of various ages to evaluate the possible importance of site-specific differences in these factors. Oaks dominate only one stand, and Acer saccharum (Sugar Maple) is the major sapling species in all well-drained stands. We attribute differences in stand composition, particularly the lack of oaks and the prevalence of Sugar Maple, mainly to differences in drainage, seed sources, and extent of deer browse.

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