| Title |
Long-term decreases in phosphorus and suspended solids, but not nitrogen, in six upper Mississippi River tributaries, 1991–2014
|
|---|---|
| Published in |
Environmental Monitoring and Assessment, July 2016
|
| DOI | 10.1007/s10661-016-5464-3 |
| Pubmed ID | |
| Authors |
Rebecca M. Kreiling, Jeffrey N. Houser |
| Abstract |
Long-term trends in tributaries provide valuable information about temporal changes in inputs of nutrients and sediments to large rivers. Data collected from 1991 to 2014 were used to investigate trends in total nitrogen (TN), total phosphorus (TP), nitrate (NO3-N), soluble-reactive P (SRP), and total suspended solids (TSS) in the following six tributaries of the upper Mississippi River: Cannon (CaR; Minnesota (MN)), Maquoketa (MR; Iowa (IA)), Wapsipinicon (WR; IA), Cuivre (CuR; Missouri (MO)), Chippewa (ChR; Wisconsin (WI)), and Black (BR; WI) rivers. Weighted regression on time discharge and season was used to statistically remove effects of random variation in discharge from estimated trends in flow-normalized concentrations and flux. Concentration and flux of TSS declined in all six rivers. Concentration of P declined in four of the rivers, and P flux declined in five rivers. Concentration and flux of N exhibited small changes relative to TP. TN concentration and flux did not change substantially in four of the rivers and decreased in two (ChR, CuR). Nitrate concentration and flux increased in three rivers (ChR, BR, CaR) and remained relatively constant in the other three rivers. General declines in P and TSS suggest that improvements in agricultural land management, such as the adoption of conservation tillage and enrollment of vulnerable acreage into the Conservation Reserve Program, may have reduced surface runoff; similar reductions in N were not observed. |
X Demographics
The data shown below were collected from the profiles of 2 X users who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 1 | 50% |
| Unknown | 1 | 50% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 2 | 100% |
Mendeley readers
The data shown below were compiled from readership statistics for 34 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 1 | 3% |
| Unknown | 33 | 97% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Researcher | 13 | 38% |
| Student > Ph. D. Student | 3 | 9% |
| Student > Bachelor | 3 | 9% |
| Professor | 2 | 6% |
| Other | 2 | 6% |
| Other | 6 | 18% |
| Unknown | 5 | 15% |
| Readers by discipline | Count | As % |
|---|---|---|
| Environmental Science | 8 | 24% |
| Earth and Planetary Sciences | 7 | 21% |
| Agricultural and Biological Sciences | 3 | 9% |
| Engineering | 3 | 9% |
| Economics, Econometrics and Finance | 2 | 6% |
| Other | 4 | 12% |
| Unknown | 7 | 21% |
Attention Score in Context
This research output has an Altmetric Attention Score of 8. 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 13 December 2021.
All research outputs
#4,145,457
of 23,854,458 outputs
Outputs from Environmental Monitoring and Assessment
#195
of 2,748 outputs
Outputs of similar age
#70,024
of 359,880 outputs
Outputs of similar age from Environmental Monitoring and Assessment
#6
of 45 outputs
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