Microbial Community Response to a Passive Salt Marsh Restoration

Lynum, Christopher A.; Bulseco, Ashley; Dunphy, Courtney M.; Osborne, Sean M.; Vineis, Joseph H.; Bowen, Jennifer L.

doi:10.1007/s12237-020-00719-y

Cited by 24 publications

(14 citation statements)

References 81 publications

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“…These might include greater seed deposition (Hopkins and Parker 1984), improved drainage (Schile et al 2011;Chapple and Dronova 2017) or increased moisture (Noe and Zedler 2000) ameliorating salinity stress, lower sulfide accumulations (King et al 1982), or nutrient subsidies from fish and invertebrates (Allen et al 2013). Frequently inundated areas near tidal creeks may also have faster development of the soil microbial community, which can be a precursor to vegetation development (Lynum et al 2020).…”

Section: Predictors Of Plant Colonizationmentioning

confidence: 99%

Monitoring Vegetation Dynamics at a Tidal Marsh Restoration Site: Integrating Field Methods, Remote Sensing and Modeling

Thomsen

Krause

Appiano

et al. 2021

Estuaries and Coasts

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Sea level rise threatens coastal wetlands worldwide, and restoration projects are implementing strategies that decrease vulnerability to this threat. Vegetation monitoring at sites employing new restoration strategies and determination of appropriate monitoring techniques improve understanding of factors leading to restoration success. In Central California, soil addition raised a degraded marsh plain to a high elevation expected to be resilient to sea level rise over the next century. We monitored plant survival and recruitment using area searches, transect surveys, and unoccupied aircraft systems (UAS) imagery. We used random forest modeling to examine the influence of nine environmental variables on vegetation colonization and conducted targeted soil sampling to examine additional factors contributing to vegetation patterns. Limited pre-construction vegetation survived soil addition, likely due to the sediment thickness (mean = 69 cm) and placement method. After 1 year, about 10% of the initially bare area saw vegetation reestablishment. Elevation and inundation frequency were particularly critical to understanding restoration success, with greatest vegetation cover in high-elevation areas tidally inundated < 0.85% of the time. Soil analysis suggested greater salinity stress and ammonium levels in poorly-vegetated compared to well-vegetated areas at the same elevation. We found that both transect and UAS methods were suitable for monitoring vegetation colonization. Field transects may provide the best approach for tracking early vegetation colonization at moderate-sized sites under resource limitations, but UAS provide a complementary landscape perspective. Beyond elucidating patterns and drivers of marsh dynamics at a newly restored site, our investigation informs monitoring of marsh restoration projects globally.

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Section: Predictors Of Plant Colonizationmentioning

confidence: 99%

Monitoring Vegetation Dynamics at a Tidal Marsh Restoration Site: Integrating Field Methods, Remote Sensing and Modeling

Thomsen

Krause

Appiano

et al. 2021

Estuaries and Coasts

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“…An increasing number of scientists are trying their best to treat this “environmental disease” ( Williams and Faber, 2001 ; Zou et al, 2014 ; Sapkota and White, 2020 ). Suaeda salsa is a salt-tolerant plant ( Lynum et al, 2020 ) and serves as the dominant native plant in Beidaihe coastal wetland, which is a suitable species to restore the degraded wetland in our restoration project. Previous restoration projects have successfully recovered the ecological function by planting S. salsa in China’s Yellow River Delta (YRD) ( Ma et al, 2017 ).…”

Section: Discussionmentioning

confidence: 99%

Variation in Bacterial Community Structures and Functions as Indicators of Response to the Restoration of Suaeda salsa: A Case Study of the Restoration in the Beidaihe Coastal Wetland

Zheng

Ding

et al. 2022

Front. Microbiol.

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Microbes play an essential role in the restoration of degraded coastal wetlands. However, few studies have focused on the role of key bacteria in the restoration process. Here, Suaeda salsa was planted to recover the biodiversity in the degraded Beidaihe coastal wetland. We monitored omics and soil environmental factors to understand the complex relationship between the bacterial community and wetland health during the restoration period. After planting S. salsa in the degraded area, the soil quality was improved in the later stage of restoration (LPR). Bacterial α-diversity increased with restoration and was positively correlated with TOC. Proteobacteria is the dominant bacterial phylum during the restoration period, and Bacteroidetes, Planctomycetes, Gemmatimonadetes, and Acidobacteria were sensitive to the planting restoration. Random forest analysis picked 30 key OTUs, showing the key bacterial variation of successful restoration. The result indicated that the sum of the relative abundances of key bacterial OTUs was more than 2% in the health wetland. The β-diversity showed that the growth of S. salsa reshaped the soil bacterial community structure and function in the LPR, which recovered to the level in the control area. Putative biogeochemical functions showed that symbionts and aromatic compound degradation were dominant bacterial functions in the growth period of S. salsa. Our study proposed a new indicator to assess wetland health and the planting restoration of S. salsa increased bacteria groups with the ability of symbionts and aromatic compound degradation in the Beidaihe coastal wetland. This study expanded our knowledge of coastal wetland restoration and its ecological contributions.

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“…The microbial ecosystem appears to be well balanced as far as sulfur and other nutrients; nevertheless, urban development, agricultural runoff, and the growth of invasive plant species are some of the current threats to maintaining these vital ecosystems. Restoration and conservation efforts of native ecosystems for the most part focus on the insect and plant community; however, a recent study by Lynum et al [ 74 ], specifically on passive salt marsh restoration, showed that the underlying microbial community’s conservation is crucial and paramount to any preservation of marsh vegetation. Although the microbial community can respond quickly in a positive direction, the process of microbial restoration can take several years, before any return to native marsh vegetation is visible [ 74 ].…”

Section: Discussionmentioning

confidence: 99%

“…Restoration and conservation efforts of native ecosystems for the most part focus on the insect and plant community; however, a recent study by Lynum et al [ 74 ], specifically on passive salt marsh restoration, showed that the underlying microbial community’s conservation is crucial and paramount to any preservation of marsh vegetation. Although the microbial community can respond quickly in a positive direction, the process of microbial restoration can take several years, before any return to native marsh vegetation is visible [ 74 ]. With the current threats to this inland salt marsh system in Nebraska, it is important to understand the underlying microbial composition and complex biochemistry.…”

Section: Discussionmentioning

confidence: 99%

The Eastern Nebraska Salt Marsh Microbiome Is Well Adapted to an Alkaline and Extreme Saline Environment

Athen

Dubey

Kyndt

2021

Life

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The Eastern Nebraska Salt Marshes contain a unique, alkaline, and saline wetland area that is a remnant of prehistoric oceans that once covered this area. The microbial composition of these salt marshes, identified by metagenomic sequencing, appears to be different from well-studied coastal salt marshes as it contains bacterial genera that have only been found in cold-adapted, alkaline, saline environments. For example, Rubribacterium was only isolated before from an Eastern Siberian soda lake, but appears to be one of the most abundant bacteria present at the time of sampling of the Eastern Nebraska Salt Marshes. Further enrichment, followed by genome sequencing and metagenomic binning, revealed the presence of several halophilic, alkalophilic bacteria that play important roles in sulfur and carbon cycling, as well as in nitrogen fixation within this ecosystem. Photosynthetic sulfur bacteria, belonging to Prosthecochloris and Marichromatium, and chemotrophic sulfur bacteria of the genera Sulfurimonas, Arcobacter, and Thiomicrospira produce valuable oxidized sulfur compounds for algal and plant growth, while alkaliphilic, sulfur-reducing bacteria belonging to Sulfurospirillum help balance the sulfur cycle. This metagenome-based study provides a baseline to understand the complex, but balanced, syntrophic microbial interactions that occur in this unique inland salt marsh environment.

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Microbial Community Response to a Passive Salt Marsh Restoration

Cited by 24 publications

References 81 publications

Monitoring Vegetation Dynamics at a Tidal Marsh Restoration Site: Integrating Field Methods, Remote Sensing and Modeling

Monitoring Vegetation Dynamics at a Tidal Marsh Restoration Site: Integrating Field Methods, Remote Sensing and Modeling

Variation in Bacterial Community Structures and Functions as Indicators of Response to the Restoration of Suaeda salsa: A Case Study of the Restoration in the Beidaihe Coastal Wetland

The Eastern Nebraska Salt Marsh Microbiome Is Well Adapted to an Alkaline and Extreme Saline Environment

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