scholarly journals Spatial and Temporal Dynamics of Dissolved Organic Carbon, Chlorophyll, Nutrients, and Trace Metals in Maritime Antarctic Snow and Snowmelt

2018 ◽  
Vol 6 ◽  
Author(s):  
Aga Nowak ◽  
Andy Hodson ◽  
Alexandra V. Turchyn
Keyword(s):  
Trace Metals ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Temporal Dynamics ◽  
Maritime Antarctic ◽  
Spatial And Temporal Dynamics ◽  
Antarctic Snow

Effects of a Forested State Park on Suspended Solid and Dissolved Organic Carbon Concentrations in an Agriculturally Impacted Watershed

2021 ◽  
Author(s):  
Eileen Rintsch ◽  
Tessa Farthing ◽  
Bartosz Grudzinski
Keyword(s):  
Water Quality ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Agricultural Land ◽  
Temporal Dynamics ◽  
Suspended Solid ◽  
Spatial And Temporal Dynamics ◽  
Agricultural Areas ◽  
Work Done ◽  
Carbon Concentrations

<p>Previous research has indicated that agricultural land use can reduce water quality in streams. This includes: 1) an increase in suspended solids (SS) due to elevated erosion and 2) shifts in dissolved organic carbon (DOC) particularly due to different C:N between agricultural crops and natural vegetation. We examine spatial and temporal dynamics of SS and DOC in four rivers, located in an agriculturally impacted watershed in SW Ohio, as they flow from agricultural land cover through a naturally forested State Park. Nineteen surface water sites were sampled bimonthly from December 2019 to December 2020. Results will be presented to determine if a forested state park improved the water quality in SW Ohio. We will further discuss how the work done in SW Ohio could be replicated in other intensive agricultural areas of Europe with similar climate patterns.</p>

scholarly journals Long term patterns in dissolved organic carbon, major elements and trace metals in boreal headwater catchments: trends, mechanisms and heterogeneity

2012 ◽  
Vol 9 (12) ◽  
pp. 19121-19163 ◽  
Author(s):  
S. K. Oni ◽  
M. N. Futter ◽  
K. Bishop ◽  
S. J. Köhler ◽  
M. Ottosson-Löfvenius ◽  
...  
Keyword(s):  
Water Quality ◽  
Trace Metals ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Temporal Trends ◽  
Control Surface ◽  
Surface Water Hydrology ◽  
Organic Carbon Concentration ◽  
Increasing Trend

Abstract. The boreal landscape is a complex, spatio-temporally varying mosaic of forest and mire landscape elements that control surface water hydrology and chemistry. Here, we assess long-term water quality time-series from three nested headwater streams draining upland forest (C2), peat/mire (C4) and mixed (C7) (forest and mire) catchments. Temporal trends in weather and runoff (1981–2008); dissolved organic carbon concentration [DOC] (1993–2010) and other water quality parameters (1987–2011) were assessed. There was no significant annual trend in precipitation or runoff but a significant monotonic increasing trend existed in air temperature and length of growing season. Stream [DOC] was positively correlated with some trace metals (copper, iron and zinc) and negatively with several other chemical parameters (e.g. sulfate, conductivity, calcium). Both sulfate and conductivity showed declining trends, while a significant increase was observed in pH during winter and spring. Calcium and magnesium showed monotonic decreasing trends. The declining trajectories of stream base cation and sulfate concentrations during other times of the year were not accompanied by changes in pH and alkalinity. Water temperature increased significantly both annually and in most months while iron and DOC concentrations showed significant increases in autumn months. Though all streams showed significant positive trends in [DOC] in autumn, only C2 had a significant annual increasing trend. There was also a shift in the magnitude of variability in spring [DOC] and increasing trend of summer baseflow [DOC] in C2 and C7.

Trace Metals and Dissolved Organic Carbon in an Estuary with Restricted River Flow and a Brown Tide Bloom

Estuaries ◽  
1999 ◽  
Vol 22 (3) ◽  
pp. 603 ◽  
Author(s):  
Eric Breuer ◽  
Sergio A. Sañudo-Wilhelmy ◽  
Robert C. Aller ◽  
Sergio A. Sanudo-Wilhelmy
Keyword(s):  
Trace Metals ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
River Flow ◽  
Brown Tide ◽  
Brown Tide Bloom

scholarly journals Long-term patterns in dissolved organic carbon, major elements and trace metals in boreal headwater catchments: trends, mechanisms and heterogeneity

2013 ◽  
Vol 10 (4) ◽  
pp. 2315-2330 ◽  
Author(s):  
S. K. Oni ◽  
M. N. Futter ◽  
K. Bishop ◽  
S. J. Köhler ◽  
M. Ottosson-Löfvenius ◽  
...  
Keyword(s):  
Water Quality ◽  
Trace Metals ◽  
Organic Carbon ◽  
Dissolved Organic Carbon ◽  
Temporal Trends ◽  
Monotonic Increase ◽  
Surface Water Hydrology ◽  
Organic Carbon Concentration ◽  
Recovery From Acidification

Abstract. The boreal landscape is a complex, spatio-temporally varying mosaic of forest and mire landscape elements that control surface water hydrology and chemistry. Here, we assess long-term water quality time series from three nested headwater streams draining upland forest (C2), peat/mire (C4) and mixed (C7) (forest and mire) catchments. Acid deposition in this region is low and is further declining. Temporal trends in weather and runoff (1981–2008), dissolved organic carbon concentration [DOC] (1993–2010) and other water quality parameters (1987–2011) were assessed. There was no significant annual trend in precipitation or runoff. However, runoff increased in March and declined in May. This suggested an earlier snowmelt regime in recent years. Significant monotonic increasing trends in air temperature and length of growing season suggested a decrease in snowfall and less spring runoff. Stream [DOC] was positively correlated with some trace metals (copper, iron and zinc) and negatively with several other chemical parameters (e.g. sulfate, conductivity, calcium). Both sulfate and conductivity showed declining trends, while a significant increase was observed in pH during winter and spring. Calcium and magnesium showed monotonic decreasing trends. The declining trajectories of stream base cation and sulfate concentrations during other times of the year were not accompanied by changes in pH and alkalinity. These results indicate subtle effects of recovery from acidification. Water temperature increased significantly both annually and in most months. A simultaneous monotonic increase in iron (Fe) and [DOC] in autumn suggests co-transport of Fe-DOC in the form of organometallic complexes. A monotonic increase in UV absorbance in most months without co-occurring changes in DOC trend suggests a shift in DOC quality to a more humic-rich type. The observed increase in soil solution [DOC] and subtle trends in stream [DOC] suggest that climate rather than recovery from acidification is the dominant driver of DOC trends in the Svartberget catchment.

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