Time-series and spatial tracking of polluted canal water intrusion into wetlands of a National Wildlife Refuge in Florida, USA

Surratt, Donatto; Waldon, Michael G.; Harwell, Matthew C.; Aumen, Nicholas G.

doi:10.1672/07-74.1

Cited by 22 publications

(26 citation statements)

References 4 publications

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“…Unlike other Fig. 4 studies that examine multiple water quality parameters simultaneously through cluster analyses (Güler et al 2002) to find commonalities among water bodies (e.g., Ryberg 2006), we were interested in determining linkages between water management and intrusion (e.g., Surratt et al 2007) by conductivity alone, as there is nearly an order of magnitude higher conductivity in the canals than in the interior-most region of the Refuge (Fig. 4; Harwell et al 2005).…”

Section: Discussionmentioning

confidence: 99%

“…In June 2004, the Refuge established an enhanced water quality monitoring network to improve the scientific understanding of water quality issues in the Refuge and to provide information that can be incorporated into water management decisions (Brandt et al 2004). The additional monthly sampling at 39 new sites, mostly along transects (Surratt et al 2007), characterized the area not covered by the previous network to examine potential water quality gradients from the perimeter canals into the marsh interior, primarily near surface water discharge sites.…”

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confidence: 99%

“…Conductivity has been used to track the influence of a number of hurricanes and tropical storms in the northern Everglades in 2004 (Harwell et al 2005;Sklar et al 2005(USFWS 2007. Recently, Surratt et al (2007) has documented canal water intrusion through the use of continuous recording of conductivity with sondes.…”

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confidence: 99%

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Conductivity as a tracer of agricultural and urban runoff to delineate water quality impacts in the northern Everglades

Harwell

Surratt

Barone

et al. 2008

Environ Monit Assess

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Agricultural and urban runoff pumped into the perimeter canals of the Arthur R. Marshall Loxahatchee National Wildlife Refuge (Refuge), a 58,320-ha soft-water wetland, has elevated nutrients which impact the Refuge interior marsh. To best manage the Refuge, linkages between inflows to the perimeter canals and environmental conditions within the marsh need to be understood. Conductivity, which typically is high in the canals and lowest at the most interior sites, was used as a surrogate tracer to characterize patterns of constituent transport. The Refuge was initially classified into four zones based upon patterns and variability in conductivity data: Canal Zone; Perimeter Zone (canal to 2.5 km into the interior); Transition Zone (2.5 to 4.5 km from the canal); Interior Zone (>4.5 km from the canal). Conductivity variability declined from the Perimeter to the Interior Zone, with the highest variability in the marsh observed in the Perimeter Zone and the lowest variability observed in the Interior Zone. Analysis of other water quality parameters indicated that conditions in the Perimeter and Transition Zones were different, and more impacted, than in the Interior Zone. In general, there was a positive relationship between structure inflows and canal phosphorus concentrations, including discharges from treatment wetlands and bypasses of untreated water. This classification approach is applicable for stratified sampling designs, resolving spatial bias in water quality models, and in aiding in management decisions about resource allocation.

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Section: Discussionmentioning

confidence: 99%

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confidence: 99%

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Conductivity as a tracer of agricultural and urban runoff to delineate water quality impacts in the northern Everglades

Harwell

Surratt

Barone

et al. 2008

Environ Monit Assess

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“…Furthermore, the correlation of TN, specific conductance, and DIC concentration (Table 4) could suggest evidence of a nutrient subsidy-stimulated DIC production. Specific conductivity has been used as a tracer of surface water with higher conductivity water representing higher available nutrient canal water penetrating portions of the marsh while lower specific conductivity water represents interior marsh surface water with relatively low nutrient concentrations Surratt et al 2008). The correlation of TN and DIC could be linked to the productivity of periphyton and blue-green algae which fix atmospheric nitrogen during metabolism.…”

Section: Dissolved Inorganic Carbon and Pco 2(aq)mentioning

confidence: 99%

Carbon pool trends and dynamics within a subtropical peatland during long-term restoration

et al. 2017

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Introduction: The Florida Everglades has undergone significant ecological change spanning the continuum of disturbance to restoration. While the restoration effort is not complete and the ecosystem continues to experience short duration perturbations, a better understanding of long-term C dynamics of the Everglades is needed to facilitate new restoration efforts. This study evaluated temporal trends of different aquatic carbon (C) pools of the northern Everglades Protection Area over a 20-year period to gauge historic C cycling patterns. Dissolved inorganic C (DIC), dissolved organic C (DOC), particulate organic C (POC), and surface water carbon dioxide (pCO 2(aq) ) were investigated between May 1, 1994 and April 30, 2015. Results: Annual mean concentrations of DIC, DOC, POC, and pCO 2(aq) significantly decreased through time or remained constant across the Water Conservation Areas (WCAs). Overall, the magnitude of the different C pools in the water column significantly differed between regions. Outgassing of CO 2 was dynamic across the Everglades ranging from 420 to 2001 kg CO 2 year −1 . Overall, the historic trend in CO 2 flux from the marsh declined across our study area while pCO 2(aq) largely remained somewhat constant with the exception of Water Conservation Area 2 which experienced significant declines in pCO 2(aq) . Particulate OC concentrations were consistent between WCAs, but a significantly decreasing trend in annual POC concentrations was observed. Conclusions: Hydrologic condition and nutrient inputs significantly influenced the balance, speciation, and flux of C pools across WCAs suggesting a subsidy-stress response in C dynamics relative to landscape scale responses in nutrient availability. The interplay between nutrient inputs and hydrologic condition exert a driving force on the balance between DIC and DOC production via the metabolism of organic matter which forms the base of the aquatic food web. Along the restoration trajectory as water quality and hydrology continues to improve, it is expected that C pools will respond accordingly.

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“…This rainfall-driven naturally oligotrophic marsh is now surrounded by canals carrying nutrient and mineral enriched water from agricultural and urban runoff. Canal water is pushed into the reserve especially during sustained periods of high infl ows to the perimeter canals and when water levels within the reserve are lower than those in the canals (Surratt et al 2008).…”

Section: Catchment Scale Human Impacts On Surface Water Inundationmentioning

confidence: 99%

Hydrological Dynamics I: Surface Waters, Flood and Sediment Dynamics

Baker

Thompson

Simpson

2009

The Wetlands Handbook

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Time-series and spatial tracking of polluted canal water intrusion into wetlands of a National Wildlife Refuge in Florida, USA

Cited by 22 publications

References 4 publications

Conductivity as a tracer of agricultural and urban runoff to delineate water quality impacts in the northern Everglades

Conductivity as a tracer of agricultural and urban runoff to delineate water quality impacts in the northern Everglades

Carbon pool trends and dynamics within a subtropical peatland during long-term restoration

Hydrological Dynamics I: Surface Waters, Flood and Sediment Dynamics

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