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Attention Score in Context
| Title |
Isotopic Composition of Inorganic Mercury and Methylmercury Downstream of a Historical Gold Mining Region
|
|---|---|
| Published in |
Environmental Science & Technology, February 2016
|
| DOI | 10.1021/acs.est.5b04413 |
| Pubmed ID | |
| Authors |
Patrick M. Donovan, Joel D. Blum, Michael Bliss Singer, Mark Marvin-DiPasquale, Martin T. K. Tsui |
| Abstract |
We measured total mercury (THg) and monomethyl mercury (MMHg) concentrations and mercury (Hg) isotopic compositions in sediment and aquatic organisms from the Yuba River (California, USA) to identify Hg sources and biogeochemical transformations downstream of a historical gold mining region. Sediment THg concentrations and δ(202)Hg decreased from the upper Yuba Fan to the lower Yuba Fan and the Feather River. These results are consistent with the release of Hg during gold mining followed by downstream mixing and dilution. The Hg isotopic composition of Yuba Fan sediment (δ(202)Hg = -0.38 ± 0.17‰ and Δ(199)Hg = 0.04 ± 0.03‰; mean ± 1 SD, n = 7) provides a fingerprint of inorganic Hg (IHg) that could be methylated locally or after transport downstream. The isotopic composition of MMHg in the Yuba River food web was estimated using biota with a range of %MMHg (the percent of THg present as MMHg) and compared to IHg in sediment, algae, and the food web. The estimated δ(202)Hg of MMHg prior to photodegradation (-1.29 to -1.07‰) was lower than that of IHg and we suggest this is due to mass-dependent fractionation (MDF) of up to -0.9‰ between IHg and MMHg. This result is in contrast to net positive MDF (+0.4 to +0.8‰) previously observed in lakes, estuaries, coastal oceans, and forests. We hypothesize that this unique relationship could be due to differences in the extent or pathway of biotic MMHg degradation in stream environments. |
Mendeley readers
The data shown below were compiled from readership statistics for 65 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 1 | 2% |
| Unknown | 64 | 98% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Ph. D. Student | 14 | 22% |
| Student > Master | 11 | 17% |
| Researcher | 8 | 12% |
| Student > Doctoral Student | 6 | 9% |
| Other | 5 | 8% |
| Other | 9 | 14% |
| Unknown | 12 | 18% |
| Readers by discipline | Count | As % |
|---|---|---|
| Environmental Science | 18 | 28% |
| Earth and Planetary Sciences | 16 | 25% |
| Chemistry | 9 | 14% |
| Agricultural and Biological Sciences | 4 | 6% |
| Engineering | 2 | 3% |
| Other | 2 | 3% |
| Unknown | 14 | 22% |
Attention Score in Context
This research output has an Altmetric Attention Score of 10. 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 25 May 2018.
All research outputs
#3,415,880
of 25,377,790 outputs
Outputs from Environmental Science & Technology
#3,976
of 20,675 outputs
Outputs of similar age
#59,180
of 405,859 outputs
Outputs of similar age from Environmental Science & Technology
#71
of 238 outputs
Altmetric has tracked 25,377,790 research outputs across all sources so far. Compared to these this one has done well and is in the 86th percentile: it's in the top 25% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 20,675 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 17.8. This one has done well, scoring higher than 80% 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 405,859 tracked outputs that were published within six weeks on either side of this one in any source. This one has done well, scoring higher than 85% of its contemporaries.
We're also able to compare this research output to 238 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 69% of its contemporaries.