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The response of soil and stream chemistry to decreases in acid deposition in the Catskill Mountains, New York, USA

Overview of attention for article published in Environmental Pollution, October 2017
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2 tweeters

Citations

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7 Dimensions

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17 Mendeley
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Title
The response of soil and stream chemistry to decreases in acid deposition in the Catskill Mountains, New York, USA
Published in
Environmental Pollution, October 2017
DOI 10.1016/j.envpol.2017.06.001
Pubmed ID
Authors

Michael R. McHale, Douglas A. Burns, Jason Siemion, Michael R. Antidormi

Abstract

The Catskill Mountains have been adversely impacted by decades of acid deposition, however, since the early 1990s, levels have decreased sharply as a result of decreases in emissions of sulfur dioxide and nitrogen oxides. This study examines trends in acid deposition, stream-water chemistry, and soil chemistry in the southeastern Catskill Mountains. We measured significant reductions in acid deposition and improvement in stream-water quality in 5 streams included in this study from 1992 to 2014. The largest, most significant trends were for sulfate (SO4(2-)) concentrations (mean trend of -2.5 μeq L(-1) yr(-1)); hydrogen ion (H(+)) and inorganic monomeric aluminum (Alim) also decreased significantly (mean trends of -0.3 μeq L(-1) yr(-1) for H(+) and -0.1 μeq L(-1) yr(-1) for Alim for the 3 most acidic sites). Acid neutralizing capacity (ANC) increased by a mean of 0.65 μeq L(-1) yr(-1) for all 5 sites, which was 4 fold less than the decrease in SO4(2-) concentrations. These upward trends in ANC were limited by coincident decreases in base cations (-1.3 μeq L(-1) yr(-1) for calcium + magnesium). No significant trends were detected in stream-water nitrate (NO3(-)) concentrations despite significant decreasing trends in NO3(-) wet deposition. We measured no recovery in soil chemistry which we attributed to an initially low soil buffering capacity that has been further depleted by decades of acid deposition. Tightly coupled decreasing trends in stream-water silicon (Si) (-0.2 μeq L(-1) yr(-1)) and base cations suggest a decrease in the soil mineral weathering rate. We hypothesize that a decrease in the ionic strength of soil water and shallow groundwater may be the principal driver of this apparent decrease in the weathering rate. A decreasing weathering rate would help to explain the slow recovery of stream pH and ANC as well as that of soil base cations.

Twitter Demographics

The data shown below were collected from the profiles of 2 tweeters who shared this research output. Click here to find out more about how the information was compiled.

Mendeley readers

The data shown below were compiled from readership statistics for 17 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 17 100%

Demographic breakdown

Readers by professional status Count As %
Student > Master 5 29%
Other 4 24%
Researcher 4 24%
Unspecified 2 12%
Student > Ph. D. Student 1 6%
Other 1 6%
Readers by discipline Count As %
Environmental Science 6 35%
Agricultural and Biological Sciences 3 18%
Unspecified 3 18%
Nursing and Health Professions 1 6%
Chemical Engineering 1 6%
Other 3 18%

Attention Score in Context

This research output has an Altmetric Attention Score of 2. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 21 September 2017.
All research outputs
#7,296,244
of 12,279,872 outputs
Outputs from Environmental Pollution
#1,895
of 3,929 outputs
Outputs of similar age
#138,983
of 271,172 outputs
Outputs of similar age from Environmental Pollution
#71
of 207 outputs
Altmetric has tracked 12,279,872 research outputs across all sources so far. This one is in the 39th percentile – i.e., 39% of other outputs scored the same or lower than it.
So far Altmetric has tracked 3,929 research outputs from this source. They typically receive a little more attention than average, with a mean Attention Score of 6.5. This one has gotten more attention than average, scoring higher than 51% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 271,172 tracked outputs that were published within six weeks on either side of this one in any source. This one is in the 47th percentile – i.e., 47% of its contemporaries scored the same or lower than it.
We're also able to compare this research output to 207 others from the same source and published within six weeks on either side of this one. This one has gotten more attention than average, scoring higher than 65% of its contemporaries.