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Tidal Marsh - Springer Nature

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Last Updated: 03 August 2022

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A Conterminous USA-Scale Map of Relative Tidal Marsh Elevation

Tidal wetlands provide myriad ecosystem services from local to global scales. However, tidal wetlands in the conterminous United States are diverse, with varied elevation gradients, and tidal amplitudes, making broad geographic comparisons difficult. According to narrowing tidal amplitudes, support for a third hypothesis and increased confusion in Z*_MHW increased from north to south, contributing to an outsized effect under narrowing tidal amplitudes. According to Z*_MHW and Z *_MHW variability, the reasons for Z*_MHW and its variability are difficult to determine because several potential causal factors are linked to latitude, but future studies may investigate the causes of median Z *_MHW and Z*_MHW variability, respectively. Z*MHW uncertainty on the Gulf Coast often had exacerbated Z*_MHW's greater amplitude than the tidal amplitude, despite the fact that applying Z*_MHW as a flood indicator to microtidal wetlands was often greater than the tidal amplitude itself.

Source link: https://doi.org/10.1007/s12237-021-01027-9


Biodegradation and Photodegradation of Vegetation-Derived Dissolved Organic Matter in Tidal Marsh Ecosystems

It was found that senescent materials leached more dissolved organic carbon than fresh material in Chesapeake Bay wetlands by undergoing microbial and mixed UV exposure and microbial incubation experiments. The percentage of absorbance remaining was higher than the 98 percent remaining DOC, meaning that colored DOM is less bioavailable than non-colored ones. The concentrations of DOC leached, %BDOC, and SUVA280 differed among species, implying that the marsh's species composition may have a significant effect on the quantity and quality of exported DOC. Compared the UV + microbial only incubations to the microbial only incubations, there were no noticeable effects on %BDOC, but UV exposure increased absorbance loss during subsequent dark incubation. These findings show the effect of senescence on the quality and amount of DOM leached from tidal wetland plants, as well as UV, as microbes and UV enhance this degradation differently than microbes alone.

Source link: https://doi.org/10.1007/s12237-021-00982-7


Connections to Tidal Marsh and Restored Salt Ponds Drive Seasonal and Spatial Variability in Ecosystem Metabolic Rates in Lower South San Francisco Bay

We characterized five years of seasonal development in two tidal sloughs in Lower South San Francisco Bay, one surrounded by a wide tidal marsh and the other connected to restored salt ponds. The peaks in DO intake were correlated with temperature and tidal elevation. Strong net heterotrophy was observed in the pond-connected slough in spring, coincident with peak phytoplankton production and export from the nearby ponds, consistent with the theory that organic matter imported from the pond provides oxygen in the turbid slough. The effect of the higher spring respiratory rates appears to be mitigated by the slough's super-oxygen-saturated water entering the slough from the highly productive pond. In the slough's outflow from the pond was lower in DO this summer, coinciding with slower, but still high, in-slough respiration.

Source link: https://doi.org/10.1007/s12237-022-01088-4


Distribution and Morphology of Littoraria irrorata in Mesohaline Tidal Marshes Dominated by Juncus roemerianus

Marsh periwinkle snails are common in salt marshes off the coast of Mexico's Atlantic and Gulf of Mexico coasts and often play important ecological roles. We investigated the distribution and morphology of L. irrorata in marshes dominated by black needlerush, an important marsh species that often occurs in more mesohaline habitats. A positive correlation was discovered between marsh salinity and mean snail shell length in J. roemerianus dominated marshes elsewhere, including snails on the waterward edge of the marsh, and a negative correlation between marsh salinity and mean snail shell length, according to the lower range of snail densities reported for S. alterniflora dominated marshes elsewhere, most L. irrorata. These findings indicate that mesohaline J. roemerianus marshes in terms of L. irrorata habitat are probably marginal; however, further research is encouraged.

Source link: https://doi.org/10.1007/s12237-022-01093-7

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions