Ecohydrology of two northern Wisconsin bogs

The dynamics of water and solutes were investigated in two northern bog ponds using sensor networks and discrete water samples. Embedded sensors monitored water level (S), precipitation (P), evaporation (E), water temperature (T) and specific conductivity (SC) in the peatlands and encircled ponds at...

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Veröffentlicht in:Ecohydrology 2023-12, Vol.16 (8), p.n/a
Hauptverfasser: Watras, Carl J., Hanson, Paul C.
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description The dynamics of water and solutes were investigated in two northern bog ponds using sensor networks and discrete water samples. Embedded sensors monitored water level (S), precipitation (P), evaporation (E), water temperature (T) and specific conductivity (SC) in the peatlands and encircled ponds at 30 min time intervals from 2009 to 2015. Pond water chemistry was monitored seasonally from 2000 to 2020. Daily hydrographs and water budgets indicated that both bogs are ombrotrophic systems, perched above the local water table. Although the predominant flowpath for liquid water was precipitation → pond → peatland → underlying glacial deposits, evaporation accounted for 70% to 90% of water losses. High dissolved organic matter (DOM) in the ponds resulted from transient reversals of flowpath and from molecular diffusion across the peatland/pond interface (a tea bag effect). DOM of peatland origin dominated pond water chemistry, regulating the concentration of important metals, major nutrients and the acid–base status of both bog ponds. Elevated concentrations of Fe, Hg and MeHg in the ponds reflected ligand binding by DOM. The formation of DOM‐Fe‐PO4 complexes likely accounted for >3‐fold higher P concentration relative to nearby clearwater lakes. Linear regression of dissolved organic carbon (DOC) against the anion deficit indicated that DOM contributed up to 6.6 mEq of strong acid per gramme carbon in pond waters. Winter maxima in the seasonal cycles of DOC, Ca, Mg, N, P, Hg and MeHg in both bog ponds were attributable, in large part, to salting out during ice formation. We conclude that multiple methods are needed to understand the dynamics of water and solutes in bog ecosystems.
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Embedded sensors monitored water level (S), precipitation (P), evaporation (E), water temperature (T) and specific conductivity (SC) in the peatlands and encircled ponds at 30 min time intervals from 2009 to 2015. Pond water chemistry was monitored seasonally from 2000 to 2020. Daily hydrographs and water budgets indicated that both bogs are ombrotrophic systems, perched above the local water table. Although the predominant flowpath for liquid water was precipitation → pond → peatland → underlying glacial deposits, evaporation accounted for 70% to 90% of water losses. High dissolved organic matter (DOM) in the ponds resulted from transient reversals of flowpath and from molecular diffusion across the peatland/pond interface (a tea bag effect). DOM of peatland origin dominated pond water chemistry, regulating the concentration of important metals, major nutrients and the acid–base status of both bog ponds. Elevated concentrations of Fe, Hg and MeHg in the ponds reflected ligand binding by DOM. The formation of DOM‐Fe‐PO4 complexes likely accounted for &gt;3‐fold higher P concentration relative to nearby clearwater lakes. Linear regression of dissolved organic carbon (DOC) against the anion deficit indicated that DOM contributed up to 6.6 mEq of strong acid per gramme carbon in pond waters. Winter maxima in the seasonal cycles of DOC, Ca, Mg, N, P, Hg and MeHg in both bog ponds were attributable, in large part, to salting out during ice formation. 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Elevated concentrations of Fe, Hg and MeHg in the ponds reflected ligand binding by DOM. The formation of DOM‐Fe‐PO4 complexes likely accounted for &gt;3‐fold higher P concentration relative to nearby clearwater lakes. Linear regression of dissolved organic carbon (DOC) against the anion deficit indicated that DOM contributed up to 6.6 mEq of strong acid per gramme carbon in pond waters. Winter maxima in the seasonal cycles of DOC, Ca, Mg, N, P, Hg and MeHg in both bog ponds were attributable, in large part, to salting out during ice formation. We conclude that multiple methods are needed to understand the dynamics of water and solutes in bog ecosystems.</description><subject>Anions</subject><subject>bog</subject><subject>Bogs</subject><subject>carbon</subject><subject>Daily hydrographs</subject><subject>Dissolved organic carbon</subject><subject>Dissolved organic matter</subject><subject>Ecohydrology</subject><subject>Embedded sensors</subject><subject>Evaporation</subject><subject>Glacial deposits</subject><subject>Groundwater table</subject><subject>Ice formation</subject><subject>Iron</subject><subject>Lakes</subject><subject>Mercury</subject><subject>Metal concentrations</subject><subject>Metals</subject><subject>Molecular diffusion</subject><subject>Nutrients</subject><subject>peatland</subject><subject>Peatlands</subject><subject>Phosphates</subject><subject>pond</subject><subject>Ponds</subject><subject>Precipitation</subject><subject>Salting</subject><subject>Seasonal variation</subject><subject>sensors</subject><subject>Solutes</subject><subject>Specific conductivity</subject><subject>Water</subject><subject>Water analysis</subject><subject>Water chemistry</subject><subject>Water levels</subject><subject>Water resources</subject><subject>Water sampling</subject><subject>Water table</subject><subject>Water temperature</subject><issn>1936-0584</issn><issn>1936-0592</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2023</creationdate><recordtype>article</recordtype><sourceid>24P</sourceid><sourceid>WIN</sourceid><recordid>eNp10E1Lw0AQBuBFFKxV8CcEvAiSut_uHiXUDyj0onhcNpvdNiVm6m5Kyb83MeLN08zheWfgReia4AXBmN57BwsqNDlBM6KZzLHQ9PRvV_wcXaS0w1gSLtgM3S0dbPsqQgObPoOQdUfIWojd1sc2-6iTgzbVbVbCJl2is2Cb5K9-5xy9Py3fipd8tX5-LR5XuaNKkZxTIRl2kojS-sADVcFZT6tSlVoybyllstJSy-C4FVyISmustAsl49aXnM3RzXR3H-Hr4FNndnCI7fDSUI3ZmH-gg7qdlIuQUvTB7GP9aWNvCDZjFWaowoxVDDSf6LFufP-vM8ti_eO_Ach4XlI</recordid><startdate>202312</startdate><enddate>202312</enddate><creator>Watras, Carl J.</creator><creator>Hanson, Paul C.</creator><general>Wiley Subscription Services, Inc</general><scope>24P</scope><scope>WIN</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QH</scope><scope>7UA</scope><scope>C1K</scope><scope>F1W</scope><scope>H96</scope><scope>H97</scope><scope>L.G</scope><orcidid>https://orcid.org/0000-0001-8533-6061</orcidid><orcidid>https://orcid.org/0000-0002-2228-5882</orcidid></search><sort><creationdate>202312</creationdate><title>Ecohydrology of two northern Wisconsin bogs</title><author>Watras, Carl J. ; Hanson, Paul C.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c2881-425630c615baef4f28fcae2db8b963ea2236d9696fc4a5455d99089cfb34aeb43</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2023</creationdate><topic>Anions</topic><topic>bog</topic><topic>Bogs</topic><topic>carbon</topic><topic>Daily hydrographs</topic><topic>Dissolved organic carbon</topic><topic>Dissolved organic matter</topic><topic>Ecohydrology</topic><topic>Embedded sensors</topic><topic>Evaporation</topic><topic>Glacial deposits</topic><topic>Groundwater table</topic><topic>Ice formation</topic><topic>Iron</topic><topic>Lakes</topic><topic>Mercury</topic><topic>Metal concentrations</topic><topic>Metals</topic><topic>Molecular diffusion</topic><topic>Nutrients</topic><topic>peatland</topic><topic>Peatlands</topic><topic>Phosphates</topic><topic>pond</topic><topic>Ponds</topic><topic>Precipitation</topic><topic>Salting</topic><topic>Seasonal variation</topic><topic>sensors</topic><topic>Solutes</topic><topic>Specific conductivity</topic><topic>Water</topic><topic>Water analysis</topic><topic>Water chemistry</topic><topic>Water levels</topic><topic>Water resources</topic><topic>Water sampling</topic><topic>Water table</topic><topic>Water temperature</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Watras, Carl J.</creatorcontrib><creatorcontrib>Hanson, Paul C.</creatorcontrib><collection>Wiley-Blackwell Open Access Titles (Open Access)</collection><collection>Wiley-Blackwell Free Backfiles(OpenAccess)</collection><collection>CrossRef</collection><collection>Aqualine</collection><collection>Water Resources Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science &amp; 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Embedded sensors monitored water level (S), precipitation (P), evaporation (E), water temperature (T) and specific conductivity (SC) in the peatlands and encircled ponds at 30 min time intervals from 2009 to 2015. Pond water chemistry was monitored seasonally from 2000 to 2020. Daily hydrographs and water budgets indicated that both bogs are ombrotrophic systems, perched above the local water table. Although the predominant flowpath for liquid water was precipitation → pond → peatland → underlying glacial deposits, evaporation accounted for 70% to 90% of water losses. High dissolved organic matter (DOM) in the ponds resulted from transient reversals of flowpath and from molecular diffusion across the peatland/pond interface (a tea bag effect). DOM of peatland origin dominated pond water chemistry, regulating the concentration of important metals, major nutrients and the acid–base status of both bog ponds. Elevated concentrations of Fe, Hg and MeHg in the ponds reflected ligand binding by DOM. The formation of DOM‐Fe‐PO4 complexes likely accounted for &gt;3‐fold higher P concentration relative to nearby clearwater lakes. Linear regression of dissolved organic carbon (DOC) against the anion deficit indicated that DOM contributed up to 6.6 mEq of strong acid per gramme carbon in pond waters. Winter maxima in the seasonal cycles of DOC, Ca, Mg, N, P, Hg and MeHg in both bog ponds were attributable, in large part, to salting out during ice formation. We conclude that multiple methods are needed to understand the dynamics of water and solutes in bog ecosystems.</abstract><cop>Oxford</cop><pub>Wiley Subscription Services, Inc</pub><doi>10.1002/eco.2591</doi><tpages>19</tpages><orcidid>https://orcid.org/0000-0001-8533-6061</orcidid><orcidid>https://orcid.org/0000-0002-2228-5882</orcidid><oa>free_for_read</oa></addata></record>
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subjects Anions
bog
Bogs
carbon
Daily hydrographs
Dissolved organic carbon
Dissolved organic matter
Ecohydrology
Embedded sensors
Evaporation
Glacial deposits
Groundwater table
Ice formation
Iron
Lakes
Mercury
Metal concentrations
Metals
Molecular diffusion
Nutrients
peatland
Peatlands
Phosphates
pond
Ponds
Precipitation
Salting
Seasonal variation
sensors
Solutes
Specific conductivity
Water
Water analysis
Water chemistry
Water levels
Water resources
Water sampling
Water table
Water temperature
title Ecohydrology of two northern Wisconsin bogs
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