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Colloid Mobilization and Seasonal Variability in a Semiarid Headwater Stream

Overview of attention for article published in Journal of Environmental Quality, January 2017
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Title
Colloid Mobilization and Seasonal Variability in a Semiarid Headwater Stream
Published in
Journal of Environmental Quality, January 2017
DOI 10.2134/jeq2016.07.0268
Pubmed ID
Authors

Taylor J. Mills, Suzanne P. Anderson, Carleton Bern, Arnulfo Aguirre, Louis A. Derry

Abstract

Colloids can be important vectors for the transport of contaminants in the environment, but little is known about colloid mobilization at the watershed scale. We present colloid concentration, composition, and flux data over a large range of hydrologic conditions from a small watershed (Gordon Gulch) in the foothills of the Colorado Front Range. Colloids, consisting predominantly of Si, Fe, and Al, were present in most stream samples but were not detected in groundwater samples. Mineralogical and morphological analysis indicated that the colloids were composed of kaolinite and illite clays with lesser amounts of amorphous Fe-hydroxides. Although colloid composition remained relatively constant over the sampled flow conditions, colloid concentrations varied considerably and increased as ionic strength of stream water decreased. The highest concentrations occurred during precipitation events after extended dry periods. These observations are consistent with laboratory studies that have shown colloids can be mobilized by decreases in pore-water ionic strength, which likely occurs during precipitation events. Colloidal particles constituted 30 to 35% of the Si mass flux and 93 to 97% of the Fe and Al mass fluxes in the <0.45-µm fraction in the stream. Colloids are therefore a significant and often overlooked component of mass fluxes whose temporal variations may yield insight into hydrologic flowpaths in this semiarid catchment.

Twitter Demographics

The data shown below were collected from the profile of 1 tweeter 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 18 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 18 100%

Demographic breakdown

Readers by professional status Count As %
Student > Master 5 28%
Student > Ph. D. Student 3 17%
Researcher 2 11%
Unspecified 1 6%
Professor 1 6%
Other 2 11%
Unknown 4 22%
Readers by discipline Count As %
Earth and Planetary Sciences 5 28%
Environmental Science 4 22%
Unspecified 1 6%
Engineering 1 6%
Unknown 7 39%

Attention Score in Context

This research output has an Altmetric Attention Score of 1. 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 19 January 2017.
All research outputs
#6,810,367
of 8,938,181 outputs
Outputs from Journal of Environmental Quality
#1,086
of 1,332 outputs
Outputs of similar age
#218,566
of 307,139 outputs
Outputs of similar age from Journal of Environmental Quality
#48
of 77 outputs
Altmetric has tracked 8,938,181 research outputs across all sources so far. This one is in the 13th percentile – i.e., 13% of other outputs scored the same or lower than it.
So far Altmetric has tracked 1,332 research outputs from this source. They receive a mean Attention Score of 4.6. This one is in the 3rd percentile – i.e., 3% of its peers scored the same or lower than it.
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 307,139 tracked outputs that were published within six weeks on either side of this one in any source. This one is in the 17th percentile – i.e., 17% of its contemporaries scored the same or lower than it.
We're also able to compare this research output to 77 others from the same source and published within six weeks on either side of this one. This one is in the 3rd percentile – i.e., 3% of its contemporaries scored the same or lower than it.