Salt marsh linkages to productivity of penaeid shrimps and blue crabs in the northern Gulf of Mexico R.J. Zimmerman, et al. Author(s): Rocha, Adrian V.; Goulden, Michael L. | Abstract: Researchers have a poor understanding of the mechanisms that allow freshwater marshes to achieve rates of net primary production (NPP) that are higher than those reported for most other types of ecosystems. We experimentally increased salinities in a tidal freshwater marsh on the Altamaha River (Georgia, USA) by exposing the organic rich soils to 3.5 yr of continuous (press) and episodic (pulse) treatments with dilute seawater to simulate the effects of climate change such as sea level rise (press) and drought (pulse). Learn about our remote access options, O’Neill School of Public and Environmental Affairs, Indiana University, Bloomington, Indiana, 47405 USA. This lag was attributed to carbohydrate reserves, which supplement carbon for new leaf growth in the early growing season of the current year. The Bulletin of the Ecological Society of America, orcid.org/https://orcid.org/0000-0003-0941-9791, I have read and accept the Wiley Online Library Terms and Conditions of Use. Freshwater wetlands dominated by emergent vegetation (i.e., freshwater marshes) are generally highly productive [ Mitsch and Gosselink, 2007 ], and most of the produced biomass ultimately enters the … The site contains two eddy covariance towers which are situated in Cattail (Typha latifolia) dominated freshwater marshes.) Freshwater input structures soil properties, vertical accretion, and nutrient accumulation of Georgia and U.S. tidal marshes Christopher Craft1 School of Public and Environmental Affairs, Indiana University, Bloomington, Indiana 47405 Copyright © 2021 Elsevier B.V. or its licensors or contributors. By continuing you agree to the use of cookies. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Download PDF: Sorry, we are unable to provide the full text but you may find it at the following location(s): http://aem.asm.org/content/72/... (external link) Marsh-nesting birds include Virginia and clapper rails, mallard and black ducks, willet, marsh wren, seaside sparrow, red-winged blackbirdatts A salt marsh or saltmarsh, also known as a coastal salt marsh or a tidal marsh, is a coastal ecosystem in the upper coastal intertidal zone between land and open saltwater or brackish water that is regularly flooded by the tides. We used an 8-year record of the gross primary production (GPP) and NPP at the San Joaquin Freshwater Marsh (SJFM) in Southern California to determine the relative importance of GPP and carbon use efficiency (CUE; the ratio of total NPP to GPP calculated as NPP GPP−1) in determining marsh NPP. [2010] showed that a short-hydroperiod freshwater marsh was a smallCO 2 sink, 49.9g C m 2 yr 1. 2014). 21, No.3, p. 407-415 September 1998 Sedimentation Cycles in a River-MouthTidal Freshwater Marsh GREGORY B. PASTERNACK! If you do not receive an email within 10 minutes, your email address may not be registered, We quantified changes in root production and decomposition, soil elevation, and soil C stocks in replicated (n = 6) 2.5 × 2.5 m field plots. Estuaries Vol. Carbon dioxide . Methane . © 2021 Ecological Society of America. Black Fork Wetlands Freshwater Marsh From banks to open water in an Ohio freshwater marsh Plant community zonation, detrital food web, wetland specialists, seasonal change, water cycle, primary productivity This CUE is larger than that reported for tropical, temperate, and boreal ecosystems, and indicates that high marsh NPP is attributable to a high CUE and not a high GPP. First, bacterial productivity can Learn more. We use cookies to help provide and enhance our service and tailor content and ads. The lack of carbon inputs from root production resulted in reduced belowground biomass of 1631 ± 308 vs. 2964 ± 204 g/m2 in control plots and an overall 2.8 ± 0.9 cm decline in soil surface elevation in the press plots in the first 3.5 yr, whereas the control (no brackish water additions) and the fresh (river water only) treatments gained 1.2 ± 0.4 and 1.7 ± 0.3 cm, respectively, in a 3.5‐yr period. 2004). rectly and indirectly from the productivity and habitat provid-ed by the Bay’s marshes. Ecophysiological determinants ofsecondary production in salt marshes: a … of freshwater supply and tidal range permits their it is not unusual to find 50 to 60 plant species in a fresh development. Although the influence of freshwater inflows on estuarine productivity has been documented, the NMFS believes that further research is necessary to identify cumulative impacts … However, there are no comparative, multiyear carbon exchange studies in Everglades freshwater ecosystems, which makes Freshwater inflows in Galveston Bay Longer term goals … • develop process-based understanding of the linkages between the magnitude of freshwater inflows, sediment and nutrient loading on productivity … Restoration activities include grading for tidal marsh elevations, levee breaching, construction of water control structures, and re-routing Marsh Creek to restore the creek delta on the Emerson parcel, providing seasonal freshwater Researchers have a poor understanding of the mechanisms that allow freshwater marshes to achieve rates of net primary production (NPP) that are higher than those reported for most other types of ecosystems. The 7-year mean (excluding 2004) NPP at the SJFM was 867 gC m −2 year −1, while the average NPP for freshwater marshes was 1050 gC m −2 year −1, indicating that the SJFM's productivity was typical for a productive They can sustain a vast array of plant communities that in turn support a wide variety of wildlife within this vital wetland ecosystem. ScienceDirect ® is a registered trademark of Elsevier B.V. ScienceDirect ® is a registered trademark of Elsevier B.V. Why is marsh productivity so high? The NPP at the SJFM was typical of highly productive freshwater marshes, while the GPP was similar to that reported for other ecosystem types, including some with comparatively low NPPs. The CUE at the SJFM for the 8-year period was 0.61 ± 0.05. Our study of microbial productivity in a freshwater marsh revealed three remarkable results that have important impli-cations for microbial dynamics and mechanisms of carbon cy-FIG. Tidal freshwater marshes (TFMs) are threatened by rising seas, which are predicted to increase an additional 0.4–1.2 m by 2100 (Horton et al. Reduced productivity leads to loss of soil elevation and soil C, which has important implications for tidal freshwater marsh persistence in the face of rising sea level. All rights reserved. We conclude that, when continuously exposed to saltwater intrusion, the tidal freshwater marsh’s net primary productivity, especially root production, and not decomposition, are the main drivers of soil organic matter (SOM) accumulation. High productivity (1.2–2.9 kg m-2yr-1) in Los Penasquitos Lagoon was attributed to the influences of freshwater impounded behind a sand bar which blocked the mouth of the lagoon during much of the study period. 2. Benthic bacterial and fungal productivity and carbon turnover in a freshwater marsh. There was no change in elevation of pulse plots after 3.5 yr. 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