Evaluation of the sources of nitrogen compounds and their influence on the biological communities in the hyporheic zone of the Sagittario River, Italy: an isotopic and biological approac

2017 ◽  
Vol 136 (1) ◽  
pp. 145-156 ◽  
Author(s):  
Mariachiara Caschetto ◽  
Diana Maria Paola Galassi ◽  
Marco Petitta ◽  
Ramon Aravena
Keyword(s):  
Hyporheic Zone ◽  
Nitrogen Compounds ◽  
Biological Communities

scholarly journals Invertebrate and Microbial Response to Hyporheic Restoration of an Urban Stream

Water ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 481
Author(s):  
Sarah A. Morley ◽  
Linda D. Rhodes ◽  
Anne E. Baxter ◽  
Giles W. Goetz ◽  
Abigail H. Wells ◽  
...  
Keyword(s):  
Hyporheic Zone ◽  
Habitat Diversity ◽  
Urban Stream ◽  
Floodplain Restoration ◽  
Design Elements ◽  
Biological Communities ◽  
Taxa Richness ◽  
Restoration Technique ◽  
Microbial Response ◽  
Face Complex

All cities face complex challenges managing urban stormwater while also protecting urban water bodies. Green stormwater infrastructure and process-based restoration offer alternative strategies that prioritize watershed connectivity. We report on a new urban floodplain restoration technique being tested in the City of Seattle, USA: an engineered hyporheic zone. The hyporheic zone has long been an overlooked component in floodplain restoration. Yet this subsurface area offers enormous potential for stormwater amelioration and is a critical component of healthy streams. From 2014 to 2017, we measured hyporheic temperature, nutrients, and microbial and invertebrate communities at three paired stream reaches with and without hyporheic restoration. At two of the three pairs, water temperature was significantly lower at the restored reach, while dissolved organic carbon and microbial metabolism were higher. Hyporheic invertebrate density and taxa richness were significantly higher across all three restored reaches. These are some of the first quantified responses of hyporheic biological communities to restoration. Our results complement earlier reports of enhanced hydrologic and chemical functioning of the engineered hyporheic zone. Together, this research demonstrates that incorporation of hyporheic design elements in floodplain restoration can enhance temperature moderation, habitat diversity, contaminant filtration, and the biological health of urban streams.

ВПЛИВ ДЖЕРЕЛ АЗОТНОГО ЖИВЛЕННЯ НА СИНТЕЗ КАРОТИНОЇДІВ ДЕЯКИМИ ШТАМАМИ БАЗИДІОМІЦЕТІВ

2014 ◽  
Vol 4 (01) ◽  
pp. 22
Author(s):  
A. K. Veligodska ◽  
O. V. Fedotov ◽  
A. S. Petreeva
Keyword(s):  
Culture Filtrate ◽  
Nutrient Medium ◽  
Culture Fluid ◽  
Carotenoid Content ◽  
Nitrogen Compounds ◽  
Total Carotenoid ◽  
Carotenoid Accumulation ◽  
Total Carotenoid Content ◽  
Peptone Medium ◽  
Acetone Extracts

<p>The influence of certain nitrogen compounds - components of glucose-peptone medium (GPM) on the accumulation of carotenoids by some strains was investigated by surface cultivating basidiomycetes. The total carotenoid content was set in acetone extracts of mycological material spectrophotometrically and calculated using the Vetshteyn formula.</p> <p>As the nitrogen-containing components used GPM with 9 compounds, such as peptone, DL-valine, L-asparagine, DL-serine, DL-tyrosine, L-proline, L-alanine, urea, NaNO<sub>3</sub>. The effect on the accumulation of specific compounds both in the mycelium and in the culture fluid of carotenoids by culturing certain strains of Basidiomycetes was identified.</p> <p>Adding to standard glucose-peptone medium peptone at 5 g/l causes an increase of carotenoid accumulation by strain <em>L. sulphureus</em> Ls-08, and in a concentration of 4 g/l by strains of <em>F. hepatica </em>Fh-18 and <em>F. fomentarius</em> Ff-1201.</p> <p>In order to increase the accumulation of carotenoids in the mycelium  we suggested to make a standard glucose-peptone medium with proline or valine for cultivating of <em>L. sulphureus</em> Ls- 08 strain; alanine for <em>F. fomentarius</em> Ff-1201 strain; proline, asparagine and serine - for strain Fh-18 of <em>F. hepatica</em>. The results can be implemented in further optimization of the composition of the nutrient medium for culturing strains of Basidiomycetes wich producing carotenoids.</p> <p><em>Keywords: nitrogen-containing substances, Basidiomycetes, mycelium</em><em>,</em><em> culture filtrate, carotenoids</em></p>

STUDY OF THE EVOLUTION OF NITROGEN COMPOUNDS DURING COAL DEVOLATILIZATION

Clean Air ◽  
2005 ◽  
Vol 6 (4) ◽  
pp. 393-408
Author(s):  
A. Arenillas ◽  
F. Rubiera ◽  
A. H. Moreno ◽  
C. Pevida ◽  
J. J. Pis
Keyword(s):  
Nitrogen Compounds
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