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  1. Article ; Online: Tidal marsh restoration enhances sediment accretion and carbon accumulation in the Stillaguamish River estuary, Washington.

    Poppe, Katrina L / Rybczyk, John M

    PloS one

    2021  Volume 16, Issue 9, Page(s) e0257244

    Abstract: Tidal marshes have been recognized globally for their ability to sequester "blue carbon" but there is still a need for studies investigating the marsh response to restoration, particularly in the Pacific Northwest United States. Here we report carbon ... ...

    Abstract Tidal marshes have been recognized globally for their ability to sequester "blue carbon" but there is still a need for studies investigating the marsh response to restoration, particularly in the Pacific Northwest United States. Here we report carbon stocks and accumulation rates for restored and natural tidal marshes in the Stillaguamish River estuary in Puget Sound, Washington, where a 60-hectare marsh was reintroduced to the tidal regime from its previous use as diked and drained farmland. We found that the restoration not only maximized carbon accumulation but also enhanced resilience to rising sea levels. Four years after restoration, mean sediment carbon stocks in the upper 30 cm within the restored marsh (4.43 kg C m-2) were slightly lower than those measured in the adjacent natural marshes (5.95 kg C m-2). Mean carbon accumulation rates, however, were nearly twice as high in the restored marsh (230.49 g C m-2 yr-1) compared to the natural marshes (123.00 g C m-2 yr-1) due to high rates of accretion in the restored marsh (1.57 cm yr-1). Mean elevation change rates were nearly twice that of corresponding 210Pb accretion rates, but all were greater than the current rate of sea level rise.
    MeSH term(s) Biomass ; Carbon/metabolism ; Estuaries ; Geologic Sediments/chemistry ; Plants/metabolism
    Chemical Substances Carbon (7440-44-0)
    Language English
    Publishing date 2021-09-10
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 1932-6203
    ISSN (online) 1932-6203
    DOI 10.1371/journal.pone.0257244
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Assessing the future of an intertidal seagrass meadow in response to sea level rise with a hybrid ecogeomorphic model of elevation change

    Poppe, Katrina L. / Rybczyk, John M.

    Ecological modelling. 2022 Apr. 11,

    2022  

    Abstract: To assess the effect of sea level rise (SLR) on a 3,800-ha eelgrass meadow in Padilla Bay National Estuarine Research Reserve in Puget Sound, Washington, USA, we coupled the Marsh Equilibrium Model (MEM) with the Relative Elevation Model (REM), combining ...

    Abstract To assess the effect of sea level rise (SLR) on a 3,800-ha eelgrass meadow in Padilla Bay National Estuarine Research Reserve in Puget Sound, Washington, USA, we coupled the Marsh Equilibrium Model (MEM) with the Relative Elevation Model (REM), combining their respective strengths in simulating aboveground and belowground processes. We then modified the hybrid model to reflect an empirical relationship between eelgrass stem density and sediment accretion, making it the first model of its kind to do so. We used field data to initialize and calibrate the model, then simulated surface elevation change under various SLR and suspended sediment scenarios and tested it against a 12-year surface elevation table dataset from the site. 100-year simulations projected relative elevation loss along at least half of the elevation gradient for all SLR scenarios, and along the entire gradient for three SLR scenarios, with greater loss at higher elevations. The current suspended sediment concentration is thus insufficient for the entire eelgrass meadow to keep pace with SLR, with up to a four-fold increase required, however this presents a management conundrum in that the required sediment load may prevent eelgrass from meeting its light requirements. The main contributions of this study thus include: the novel combination of MEM and REM models, the inclusion of stem density as a factor controlling accretion, the use of a long-term data record for model initialization, calibration, and validation, and the finding that increasing sediment inputs to maintain the elevation of the habitat in the long term may be detrimental to eelgrass health in the short term.
    Keywords Zostera marina ; altitude ; data collection ; estuaries ; habitats ; hybrids ; littoral zone ; meadows ; models ; sea level ; sediment contamination ; sediments ; suspended sediment ; Puget Sound
    Language English
    Dates of publication 2022-0411
    Publishing place Elsevier B.V.
    Document type Article
    Note Pre-press version
    ZDB-ID 191971-4
    ISSN 0304-3800
    ISSN 0304-3800
    DOI 10.1016/j.ecolmodel.2022.109975
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    Z 77/705: Show issues

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  3. Article: How should surface elevation table data be analyzed? A comparison of several commonly used analysis methods and one newly proposed approach

    Russell, Brook T. / Cressman, Kimberly A. / Schmit, John Paul / Shull, Suzanne / Rybczyk, John M. / Frost, David L.

    Environmental and ecological statistics. 2022 June, v. 29, no. 2

    2022  

    Abstract: The use of surface elevation table (SET) instruments to monitor elevation changes at low elevation coastal locations has steadily increased in recent years. A primary focus in the analysis of SET data is the estimation of the overall rate of elevation ... ...

    Abstract The use of surface elevation table (SET) instruments to monitor elevation changes at low elevation coastal locations has steadily increased in recent years. A primary focus in the analysis of SET data is the estimation of the overall rate of elevation change, and numerous approaches have been used for this purpose. In this work, we compare and contrast several methods used for estimating the true rate of elevation change at SET station locations, including a novel approach proposed in this work that incorporates spatial dependence. We also discuss theoretical properties of one class of estimators, and undertake a comprehensive simulation study. Additionally, we present two case studies where we illustrate these differences using real SET data. All methods considered here tend to produce similar point estimates, but some confidence interval procedures can generate intervals with empirical coverage rates lower than specified. However, the best analysis approach is likely dependent upon selecting the method that best coincides with the true underlying process. Thus, we do not uniformly recommend one approach for all situations. Instead, we suggest carefully weighing potential advantages and disadvantages of each method before conducting analysis, while keeping in mind the ways in which modeling assumptions may impact this decision.
    Keywords altitude ; case studies ; confidence interval ; data analysis ; data collection ; models ; monitoring ; surfaces
    Language English
    Dates of publication 2022-06
    Size p. 359-391.
    Publishing place Springer US
    Document type Article
    ZDB-ID 2000906-9
    ISSN 1573-3009 ; 1352-8505
    ISSN (online) 1573-3009
    ISSN 1352-8505
    DOI 10.1007/s10651-021-00524-1
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  4. Article ; Online: Can Coastal Habitats Rise to the Challenge? Resilience of Estuarine Habitats, Carbon Accumulation, and Economic Value to Sea-Level Rise in a Puget Sound Estuary

    Moritsch, Monica M. / Byrd, Kristin B. / Davis, Melanie / Good, Anthony / Drexler, Judith Z. / Morris, James T. / Woo, Isa / Windham-Myers, Lisamarie / Grossman, Eric / Nakai, Glynnis / Poppe, Katrina L. / Rybczyk, John M.

    Estuaries and Coasts. 2022 Dec., v. 45, no. 8 p.2293-2309

    2022  

    Abstract: Sea-level rise (SLR) and obstructions to sediment delivery pose challenges to the persistence of estuarine habitats and the ecosystem services they provide. Restoration actions and sediment management strategies may help mitigate such challenges by ... ...

    Abstract Sea-level rise (SLR) and obstructions to sediment delivery pose challenges to the persistence of estuarine habitats and the ecosystem services they provide. Restoration actions and sediment management strategies may help mitigate such challenges by encouraging the vertical accretion of sediment in and horizontal migration of tidal forests and marshes. We used a process-based soil accretion model (Coastal Wetland Equilibrium Model) combined with a habitat classification model (MOSAICS) to estimate the effects of SLR, suspended sediment, and inland habitat migration on estuarine habitats, soil carbon accumulation, and economic value of climate change mitigation of carbon accumulation (social cost of carbon dioxide) in a macrotidal estuary in the northwest USA over 100 years (2011 to 2110). Under present-day sediment levels, we projected that after 100 years, most high salt marsh would remain with < 100 cm SLR, but substantial area converted to transitional (low) salt marsh and mudflat with ≥ 100 cm SLR. Increasing sediment availability increased the projected resilience of transitional salt marsh to SLR but did not prevent declines in high marsh area. Projected total carbon accumulation plateaued or declined with ≥ 100 cm SLR, yet the economic value of carbon accumulation continued to rise over time, suggesting that the value of this ecosystem service was resilient to SLR. Doubling or tripling sediment availability increased projected carbon accumulation up to 7.69 and 14.2 kg m⁻² and increased total economic value up to $373,000 and $710,000, respectively. Allowing marsh migration supported conversion of upland to freshwater marsh, with slight increases in carbon accumulation. These results inform climate adaptation planning for wetland managers seeking to understand the resilience of estuarine habitats and ecosystem services to SLR under multiple management strategies.
    Keywords carbon ; carbon dioxide ; climate ; climate change ; economic valuation ; ecosystem services ; ecosystems ; estuaries ; freshwater marshes ; habitats ; highlands ; migratory behavior ; models ; salt marshes ; sea level ; sediments ; soil ; soil carbon ; Northwestern United States ; Puget Sound
    Language English
    Dates of publication 2022-12
    Size p. 2293-2309.
    Publishing place Springer US
    Document type Article ; Online
    ZDB-ID 2229170-2
    ISSN 1559-2731 ; 1559-2723
    ISSN (online) 1559-2731
    ISSN 1559-2723
    DOI 10.1007/s12237-022-01087-5
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  5. Article ; Online: Global dataset of soil organic carbon in tidal marshes.

    Maxwell, Tania L / Rovai, André S / Adame, Maria Fernanda / Adams, Janine B / Álvarez-Rogel, José / Austin, William E N / Beasy, Kim / Boscutti, Francesco / Böttcher, Michael E / Bouma, Tjeerd J / Bulmer, Richard H / Burden, Annette / Burke, Shannon A / Camacho, Saritta / Chaudhary, Doongar R / Chmura, Gail L / Copertino, Margareth / Cott, Grace M / Craft, Christopher /
    Day, John / de Los Santos, Carmen B / Denis, Lionel / Ding, Weixin / Ellison, Joanna C / Ewers Lewis, Carolyn J / Giani, Luise / Gispert, Maria / Gontharet, Swanne / González-Pérez, José A / González-Alcaraz, M Nazaret / Gorham, Connor / Graversen, Anna Elizabeth L / Grey, Anthony / Guerra, Roberta / He, Qiang / Holmquist, James R / Jones, Alice R / Juanes, José A / Kelleher, Brian P / Kohfeld, Karen E / Krause-Jensen, Dorte / Lafratta, Anna / Lavery, Paul S / Laws, Edward A / Leiva-Dueñas, Carmen / Loh, Pei Sun / Lovelock, Catherine E / Lundquist, Carolyn J / Macreadie, Peter I / Mazarrasa, Inés / Megonigal, J Patrick / Neto, Joao M / Nogueira, Juliana / Osland, Michael J / Pagès, Jordi F / Perera, Nipuni / Pfeiffer, Eva-Maria / Pollmann, Thomas / Raw, Jacqueline L / Recio, María / Ruiz-Fernández, Ana Carolina / Russell, Sophie K / Rybczyk, John M / Sammul, Marek / Sanders, Christian / Santos, Rui / Serrano, Oscar / Siewert, Matthias / Smeaton, Craig / Song, Zhaoliang / Trasar-Cepeda, Carmen / Twilley, Robert R / Van de Broek, Marijn / Vitti, Stefano / Antisari, Livia Vittori / Voltz, Baptiste / Wails, Christy N / Ward, Raymond D / Ward, Melissa / Wolfe, Jaxine / Yang, Renmin / Zubrzycki, Sebastian / Landis, Emily / Smart, Lindsey / Spalding, Mark / Worthington, Thomas A

    Scientific data

    2023  Volume 10, Issue 1, Page(s) 797

    Abstract: Tidal marshes store large amounts of organic carbon in their soils. Field data quantifying soil organic carbon (SOC) stocks provide an important resource for researchers, natural resource managers, and policy-makers working towards the protection, ... ...

    Abstract Tidal marshes store large amounts of organic carbon in their soils. Field data quantifying soil organic carbon (SOC) stocks provide an important resource for researchers, natural resource managers, and policy-makers working towards the protection, restoration, and valuation of these ecosystems. We collated a global dataset of tidal marsh soil organic carbon (MarSOC) from 99 studies that includes location, soil depth, site name, dry bulk density, SOC, and/or soil organic matter (SOM). The MarSOC dataset includes 17,454 data points from 2,329 unique locations, and 29 countries. We generated a general transfer function for the conversion of SOM to SOC. Using this data we estimated a median (± median absolute deviation) value of 79.2 ± 38.1 Mg SOC ha
    Language English
    Publishing date 2023-11-11
    Publishing country England
    Document type Dataset ; Journal Article
    ZDB-ID 2775191-0
    ISSN 2052-4463 ; 2052-4463
    ISSN (online) 2052-4463
    ISSN 2052-4463
    DOI 10.1038/s41597-023-02633-x
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  6. Article: A Water Chemistry Assessment of Wastewater Remediation in a Natural Swamp

    Zhang, Xiaowei / Conner, William H / Day, John W / Feagley, Sam E / Hesse, Irene D / Hudnall, Wayne H / Rybczyk, John M

    Journal of environmental quality. 2000 Nov., v. 29, no. 6

    2000  

    Abstract: Various aspects of water chemistry of a natural forested wetland were studied in order to determine the possibility of using the wetland for advanced wastewater treatment in Louisiana and to evaluate the wastewater effect on swamp water quality. The ... ...

    Abstract Various aspects of water chemistry of a natural forested wetland were studied in order to determine the possibility of using the wetland for advanced wastewater treatment in Louisiana and to evaluate the wastewater effect on swamp water quality. The study was carried out by comparing treatment and control cypress-tupelo forests separated by a bottomland hardwood forest ridge. The treatment area (231 ha) received secondarily treated municipal wastewater at a rate of 6.3 × 106 L d−1. The calculated hydraulic detention time of the wastewater was 120 d. Electrical conductivity (EC), pH, and concentrations of 5-d biological oxygen demand (BOD5), dissolved oxygen (DO), solids, nutrients, and trace metals were monitored. Mean concentrations for the wastewater were 14.6 mg L−1 for total N and 2.5 mg L−1 for total P. The dominant form of N in the wastewater was NO3-N. The swamp system attenuated the NO3-N by 100%, total Kjeldahl nitrogen (TKN) by 69%, and total P by 66%. It appears that tertiary wastewater treatment was achieved due to the nutrient attenuations. Based upon our findings, we predict that the high N attenuation efficiency would enable the swamp to work well if the N loading rate were doubled. However, P removal was dependent on loading rate, hydraulic retention time, and temperature. The swamp was more efficient in treating wastewater during warm seasons than cool seasons. During the monitoring period, trace metals were not significantly increased in the swamp water because of very low concentrations in the wastewater. This work was performed at the Louisiana State Univ. Joint contribution from the Oceanography and Coastal Sciences Department and Agronomy department.
    Keywords wastewater treatment ; wetlands ; Louisiana
    Language English
    Dates of publication 2000-11
    Size p. 1960-1968.
    Publishing place American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
    Document type Article
    Note epub
    ZDB-ID 120525-0
    ISSN 1537-2537 ; 0047-2425
    ISSN (online) 1537-2537
    ISSN 0047-2425
    DOI 10.2134/jeq2000.00472425002900060032x
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    In stock of ZB MED Bonn / Germany

    Z 2687: Show issues

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