Comparing spiraling‐ and transport‐based approaches to estimate in‐stream nutrient uptake length from pulse additions

Ecohydrology ◽  
2021 ◽  
Author(s):  
Nícolas Reinaldo Finkler ◽  
Björn Gücker ◽  
Iola Gonçalves Boëchat ◽  
Flávia Tromboni ◽  
Steven Arnold Thomas ◽  
...  
Keyword(s):  
Nutrient Uptake ◽  
Uptake Length

A probabilistic framework for nutrient uptake length

2012 ◽  
Vol 6 (1) ◽  
pp. 71-86 ◽  
Author(s):  
Frithjof Lutscher ◽  
Edward McCauley
Keyword(s):  
Nutrient Uptake ◽  
Probabilistic Framework ◽  
Uptake Length

Nutrient uptake during low-level fertilization of a large, seventh-order oligotrophic river

2018 ◽  
Vol 75 (4) ◽  
pp. 569-579 ◽  
Author(s):  
Peter R.B. Ward ◽  
Paul J. Anders ◽  
G. Wayne Minshall ◽  
Charlie Holderman ◽  
Genevieve M. Hoyle ◽  
...  
Keyword(s):  
Nutrient Uptake ◽  
N Uptake ◽  
Late Summer ◽  
Slow Increase ◽  
Dissolved Phosphorus ◽  
Uptake Length ◽  
Seventh Order ◽  
Uptake Velocity ◽  
Kootenai River ◽  
N Rates

Uptake of nitrogen (total nitrogen (TN), NH4-N, and NO3-N) and phosphorus (total dissolved phosphorus (TDP) and total phosphorus (TP)) was quantified June through September 2009–2011 using whole-river fertilization in a seventh-order, P-limited river (Kootenai River, Idaho, USA), at discharges up to three orders of magnitude greater than previously studied. Mean uptake length (Sw) and uptake velocity (Vf) values were similar for dosed TDP and NH4; both had steep gradients indicating rapid uptake, while NO3-N did not. TP remained higher than reference levels. TN showed no clear pattern. Autotrophs accounted for 28% of daylight mean NO3-N uptake compared with 72% by heterotrophs. Nutrient uptake was strongly associated with chlorophyll accrual and epilithon growth rates. Mean midsummer epilithon growth and N rates roughly tripled late summer rates. TDP uptake length (Sw = 5.7 km) showed a slow increase with increasing stream order consistent with published findings. Mean TDP uptake velocity (Vf = 32 mm·min−1) was eight times greater than previously seen in smaller streams. Vf (10.9 ± 5 mm·min−1) and Sw (16.8. ± 7 km) for NO3-N increased with increasing river order and discharge.

Effect of Some Natural Mineral Waters in Nutrient Uptake by Caco-2 Cells

2010 ◽  
Vol 80 (2) ◽  
pp. 131-143 ◽  
Author(s):  
Pedro Gonçalves ◽  
João R. Araújo ◽  
Fátima Martel
Keyword(s):  
Nutrient Uptake ◽  
Mineral Waters ◽  
Distilled Water ◽  
Natural Mineral ◽  
Minute Exposure

We studied the effect of some mineral waters and some of their constituents on the apical uptake of 14C-butyrate (14C-BT) and 3H-O-methyl-D-glucose (3H-OMG) by Caco-2 cells. Uptake of 14C-BT increased after a 20-minute exposure to 1 % (v/v) distilled water, and, compared to distilled water, it was decreased by Pedras Salgadas® 1 % (v/v) and Melgaço® 5 % (v/v), and increased by Vidago® 5 % (v/v). Moreover, it increased after a 48-hour exposure to Vidago® or Melgaço® waters (5 % (v/v)). Also, uptake of 14C-BT was reduced after a 20-minute exposure to MgCl2, MgSO4, or CaCl2. Uptake of 3H-OMG was reduced after a 20-minute exposure to Melgaço® water [1 % (v/v)], when compared to distilled water. Also, a 48-hour exposure to Pedras Salgadas® or Melgaço® water (5 % (v/v)) increased and decreased uptake, respectively. Finally, uptake of 3H-OMG decreased after a 20-minute exposure to MgSO4 or NaF. In conclusion, uptake of 14C-BT and 3H-OMG by Caco-2 cells is differently modulated by distinct mineral waters.

The influence of nitrogen fertilization on protein yield and nutrient uptake in different triticale genotypes

2007 ◽  
Vol 35 (2) ◽  
pp. 253-256
Author(s):  
Milan Biberdžić ◽  
Ivica Đalović ◽  
Aleksandar Paunović ◽  
Ilija Komljenović
Keyword(s):  
Nutrient Uptake ◽  
Nitrogen Fertilization ◽  
Protein Yield

Nutrient Uptake Illustrated for Modern, High-Yielding Soybean

2018 ◽  
Vol 102 (1) ◽  
pp. 11-14 ◽  
Author(s):  
Gabriel Barth ◽  
Eros Francisco ◽  
Juliana Tamie Suyama
Keyword(s):  
Nutrient Uptake
Sign in / Sign up

Export Citation Format

Share Document