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Dissecting the ecosystem service of large-scale pollutant retention: The role of wetlands and other landscape features.

Quin A, Jaramillo F, Destouni G - Ambio (2015)

Bottom Line: Various features of a landscape contribute to the regulating ecosystem service of reducing waterborne pollutant loading to downstream environments.At local scales, wetlands have been shown to be effective in retaining pollutants.We develop a general analytical model which shows that the retention contribution of wetlands and other landscape features is only significant if a large fraction of the total waterborne pollutant transport passes through them.

View Article: PubMed Central - PubMed

Affiliation: Department of Physical Geography and Quaternary Geology, Stockholm University, 106 91, Stockholm, Sweden, andrew.quin@natgeo.su.se.

ABSTRACT
Various features of a landscape contribute to the regulating ecosystem service of reducing waterborne pollutant loading to downstream environments. At local scales, wetlands have been shown to be effective in retaining pollutants. Here, we investigate the landscape-scale contribution to pollutant retention provided by multiple wetlands. We develop a general analytical model which shows that the retention contribution of wetlands and other landscape features is only significant if a large fraction of the total waterborne pollutant transport passes through them. Next, by means of a statistical analysis of official data, we quantify the nutrient retention contribution of wetlands for multiple sub-catchments in two Swedish Water Management Districts. We compare this with the retention contribution of two other landscape features: the waterborne transport distance and major lakes. The landscape-scale retention contribution of wetlands is undetectable; rather, the other two landscape features account for much of the total nutrient retention.

No MeSH data available.


Related in: MedlinePlus

Relative nutrient retention (rSC) versus relative wetland area in the PLC5 catchments (shown in Fig. 2) for the North Baltic WMD (left) and the South Baltic WMD (right). PLC5 catchments with surface water flow and nutrient transport pathways that go through a major lake en route to their coastal outlet are marked in purple, while other catchments are marked in yellow. For both of these groups, the average relative retention for total nitrogen (TN) and total phosphorus (TP) is given, shown by the dotted lines. Linear regression over all data points yields R2 values of 0.014 and 0.022 for TN and TP, respectively, in the North Baltic WMD, and R2 values of 0.01 and 0.015 for TN and TP, respectively, in the South Baltic WMD
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Fig3: Relative nutrient retention (rSC) versus relative wetland area in the PLC5 catchments (shown in Fig. 2) for the North Baltic WMD (left) and the South Baltic WMD (right). PLC5 catchments with surface water flow and nutrient transport pathways that go through a major lake en route to their coastal outlet are marked in purple, while other catchments are marked in yellow. For both of these groups, the average relative retention for total nitrogen (TN) and total phosphorus (TP) is given, shown by the dotted lines. Linear regression over all data points yields R2 values of 0.014 and 0.022 for TN and TP, respectively, in the North Baltic WMD, and R2 values of 0.01 and 0.015 for TN and TP, respectively, in the South Baltic WMD

Mentions: On average across all PLC5 catchments in the North and South Baltic WMDs, and for the range of 0–5 % wetland area that exists within them, there is no correlation and thus no detectable landscape-scale contribution of wetlands to the total retention of either TN or TP (Fig. 3). This can be concluded since the differences in relative wetland area do not imply any corresponding differences in total nutrient retention among the catchments. With regard to the major lakes (Mälaren and Vättern), however, their retention contribution is large for the catchments with main surface water flow and transport pathways through them (purple, Fig. 3). This can be concluded, as their average rSC is 0.62 for TN and 0.76 for TP for the North Baltic WMD and 0.88 for TN and 0.95 for TP for the South Baltic WMD, whereas corresponding rSC values for the other catchments are only 0.31 and 0.32, respectively, for the North Baltic WMD and 0.32 and 0.24, respectively, for the South Baltic WMD (Fig. 3). Lake Mälaren in the North Baltic WMD increases thus on average the total landscape-scale retention by a factor 2 for TN and 2.4 for TP, whereas the corresponding factors for Lake Vättern in the South Baltic WMD are somewhat greater, increasing TN and TP retention by 2.8 and 4, respectively.Fig. 3


Dissecting the ecosystem service of large-scale pollutant retention: The role of wetlands and other landscape features.

Quin A, Jaramillo F, Destouni G - Ambio (2015)

Relative nutrient retention (rSC) versus relative wetland area in the PLC5 catchments (shown in Fig. 2) for the North Baltic WMD (left) and the South Baltic WMD (right). PLC5 catchments with surface water flow and nutrient transport pathways that go through a major lake en route to their coastal outlet are marked in purple, while other catchments are marked in yellow. For both of these groups, the average relative retention for total nitrogen (TN) and total phosphorus (TP) is given, shown by the dotted lines. Linear regression over all data points yields R2 values of 0.014 and 0.022 for TN and TP, respectively, in the North Baltic WMD, and R2 values of 0.01 and 0.015 for TN and TP, respectively, in the South Baltic WMD
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4288994&req=5

Fig3: Relative nutrient retention (rSC) versus relative wetland area in the PLC5 catchments (shown in Fig. 2) for the North Baltic WMD (left) and the South Baltic WMD (right). PLC5 catchments with surface water flow and nutrient transport pathways that go through a major lake en route to their coastal outlet are marked in purple, while other catchments are marked in yellow. For both of these groups, the average relative retention for total nitrogen (TN) and total phosphorus (TP) is given, shown by the dotted lines. Linear regression over all data points yields R2 values of 0.014 and 0.022 for TN and TP, respectively, in the North Baltic WMD, and R2 values of 0.01 and 0.015 for TN and TP, respectively, in the South Baltic WMD
Mentions: On average across all PLC5 catchments in the North and South Baltic WMDs, and for the range of 0–5 % wetland area that exists within them, there is no correlation and thus no detectable landscape-scale contribution of wetlands to the total retention of either TN or TP (Fig. 3). This can be concluded since the differences in relative wetland area do not imply any corresponding differences in total nutrient retention among the catchments. With regard to the major lakes (Mälaren and Vättern), however, their retention contribution is large for the catchments with main surface water flow and transport pathways through them (purple, Fig. 3). This can be concluded, as their average rSC is 0.62 for TN and 0.76 for TP for the North Baltic WMD and 0.88 for TN and 0.95 for TP for the South Baltic WMD, whereas corresponding rSC values for the other catchments are only 0.31 and 0.32, respectively, for the North Baltic WMD and 0.32 and 0.24, respectively, for the South Baltic WMD (Fig. 3). Lake Mälaren in the North Baltic WMD increases thus on average the total landscape-scale retention by a factor 2 for TN and 2.4 for TP, whereas the corresponding factors for Lake Vättern in the South Baltic WMD are somewhat greater, increasing TN and TP retention by 2.8 and 4, respectively.Fig. 3

Bottom Line: Various features of a landscape contribute to the regulating ecosystem service of reducing waterborne pollutant loading to downstream environments.At local scales, wetlands have been shown to be effective in retaining pollutants.We develop a general analytical model which shows that the retention contribution of wetlands and other landscape features is only significant if a large fraction of the total waterborne pollutant transport passes through them.

View Article: PubMed Central - PubMed

Affiliation: Department of Physical Geography and Quaternary Geology, Stockholm University, 106 91, Stockholm, Sweden, andrew.quin@natgeo.su.se.

ABSTRACT
Various features of a landscape contribute to the regulating ecosystem service of reducing waterborne pollutant loading to downstream environments. At local scales, wetlands have been shown to be effective in retaining pollutants. Here, we investigate the landscape-scale contribution to pollutant retention provided by multiple wetlands. We develop a general analytical model which shows that the retention contribution of wetlands and other landscape features is only significant if a large fraction of the total waterborne pollutant transport passes through them. Next, by means of a statistical analysis of official data, we quantify the nutrient retention contribution of wetlands for multiple sub-catchments in two Swedish Water Management Districts. We compare this with the retention contribution of two other landscape features: the waterborne transport distance and major lakes. The landscape-scale retention contribution of wetlands is undetectable; rather, the other two landscape features account for much of the total nutrient retention.

No MeSH data available.


Related in: MedlinePlus