Restoration and Management of a Degraded Baldcypress Swamp and Freshwater Marsh in Coastal Louisiana

Hunter, Rachael G.; Day, John W.; Shaffer, Gary; Lane, Robert R.; Englande, A. J.; Reimers, Robert S.; Kandalepas, Demetra; Wood, William B.; Day, John; Hillmann, Eva R.

doi:10.3390/w8030071

Cited by 11 publications

(4 citation statements)

References 48 publications

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“…For example, Novak and Short (2000) performed a suitability analysis for eelgrass meadows on Plum Island. Hunter et al (2016) carried out a restoration suitability assessment for swamps in order to safeguard and improve the provision of important ecosystem services. However, land suitability analysis for alvar grasslands in Estonia has not been performed so far.…”

Section: Figure 1: Distribution Of Alvar Grasslands In Estoniamentioning

confidence: 99%

Land Suitability Analysis of Alvar Grassland Vegetation in Estonia Using Random Forest

Ismayilova¹,

Uuemaa²,

Helm³

et al. 2020

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Calcareous alvar grasslands are one of the most species-rich habitats in Estonia. Land-use change and cessation of traditional agricultural practices have led to a decrease of the area of these valuable grasslands during the past century. Therefore, their conservation and restoration are becoming increasingly important. Efforts to restore these habitats have already been made in recent years. Land suitability analysis for potential restoration sites, using the machine learning technique Random Forest (RF), was performed for the first time in this study, which aimed to assess the use of RF for a suitability analysis of alvar grassland. RF predicted 610.91 km 2 of areas suitable for restoring alvar grasslands or for creating alvarlike habitats in Estonia. These areas include all existing alvar areas as well an additional 140.91 km 2 suitable for establishing new habitat similar to calcareous alvar grasslands. We discuss suitability analysis to help with restoration planning and find it to be a reasonable and efficient tool that has potential to provide relevant information. The quality of the prediction could be improved by including additional data relevant for alvar grasslands, such as soil depth, but such data was unfortunately unavailable.

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Section: Figure 1: Distribution Of Alvar Grasslands In Estoniamentioning

confidence: 99%

Land Suitability Analysis of Alvar Grassland Vegetation in Estonia Using Random Forest

Ismayilova¹,

Uuemaa²,

Helm³

et al. 2020

giforum

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“…Before taking the water sample, we rinsed the washed 50 mL sample bottle with freshwater three times and then sealed the water. 14 C, 3 H, CFC-11, CFC-12 samples used a 60 mL glass bottle. Then, before sampling, the glass bottle was rinsed and stored in sealed conditions to avoid exposure to air.…”

Section: Collection and Testing Of Groundwater Samplesmentioning

confidence: 99%

“…Then, before sampling, the glass bottle was rinsed and stored in sealed conditions to avoid exposure to air. 14 C, 3 H, CFC-11, CFC-12 samples were sent to the Beta Analytic Radiocarbon Dating Laboratory to complete the test [7]. K + and Na + were measured using a flame photometer and Ca 2+ and Mg 2+ were measured using a Shimadzu-AA7000 atomic absorption spectrophotometer.…”

Section: Collection and Testing Of Groundwater Samplesmentioning

confidence: 99%

Groundwater Hydrochemical Zoning in Inland Plains and its Genetic Mechanisms

Xing

Huang

Hou

et al. 2018

Water

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Pore water in inland plain areas, generally having poor water quality, contain complex hydrochemical properties. In order to examine groundwater chemical composition formation characteristics, groundwater in the Jiyang area of Lubei Plain was studied using stratified monitoring of drilling, analysis of water level and water quality, isotope analysis, ion ratio coefficient and isothermal adsorption experiments, hydrochemical characteristics, and analysis of variations in different shallow depths. Results show that: (1) Numerous hydrochemistry types are present in the diving. Along with the direction of groundwater flow, total dissolved solids (TDS) of diving in the study area generally increases and the hydrochemical type changes from the HCO 3 type to the HCO 3 •SO 4 type, Cl•HCO 3 type and the Cl•SO 4 type. (2) Shallow brackish water and freshwater in the horizontal direction are alternately distributed, and shallow brackish water is distributed in the area between old channels, showing sporadic spots or bands, whose hydrochemistry type is predominantly Cl•SO 4-Na•Mg•Ca. (3) Affected by the sedimentary environment, hydrodynamic conditions and other factors; diving, middle brackish water and deep freshwater are vertically deposited in the study area. The dynamics of middle brackish water quality are stable due to the sedimentary environment and clay deposits. The hydrochemistry types of middle brackish water are mainly Cl•SO 4-Mg•Na and SO 4 •Cl-Na•Mg, while the deep confined water is dominated by HCO 3. (4) The optimal adsorption isotherms of Na + , Ca 2+ and Mg 2+ in groundwater from clay, with a thickness raging from 6-112 m, conformed to the Henry equation and the Langmuir equation. The retardation of Na + , Ca 2+ and Mg 2+ in groundwater differed with differing depths of the clay deposit. The trend of change in retardation strength correlates strongly with the TDS of groundwater. Groundwater in the inland plain area is affected by complicated hydrogeochemical processes; in addition, leaching, cation exchange, evaporative concentration and clay retardation have an important influence on the horizontal and vertical zonation of groundwater chemical components.

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“…Saltwater intrusion is increasingly widespread in the Mississippi River Deltaic region. The study by Hunter and others [16] investigated a 12,000-ha wetland east of New Orleans that was boarded completely by levees. The area was a healthy forested swamp and fresh/low salinity marsh before construction of the levees prevented Mississippi River floodwaters.…”

Section: Wetland Loss Saltwater Intrusion and Subsidencementioning

confidence: 99%

Assessing Resilience and Sustainability of the Mississippi River Delta as a Coupled Natural-Human System

Lam

Liu

2018

Water

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This book contains 14 articles selected from a special issue on the assessment of resilience and sustainability of the Mississippi River Delta as a coupled natural-human system. This effort is supported in part by a U. S. National Science Foundation grant. The goal of this book is to present some of the recent advances in research and research methodologies, major discoveries, and new understanding of the Mississippi River Delta, which represents one of the most challenging cases in finding the pathways for coastal resilience and sustainability because of the complexity of environmental and socioeconomic interactions. The articles are contributed by 39 researchers and they studied the deltaic system from five aspects including 1) riverine processes and sediment availability, 2) sediment deposition and land creation, 3) wetland loss, saltwater intrusion, and subsidence, 4) community resilience and planning, and 5) review and synthesis. As editors, by reviewing and putting these papers together, we have realized a major challenge in conducting an interdisciplinary assessment of resilience: How to identify a “Common Threshold” from different scientific disciplines for a highly nature-human intertwined river delta system? For instance, the threshold for sustaining a river delta in the view of physical sciences is different from that of social sciences. Such a common threshold would be a radical change and/or a collapse of a coupled natural-human delta system if nothing can be or will be done. Identifying the common threshold would help guide assessment and evaluation of the resilience of a CNH system as well as the feasibility and willingness of protecting the system’s resilience. We hope this book will be a first step toward inspiring researchers from different disciplines to work closely together to solve real problems in sustaining precious river delta ecosystems across the globe.

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Restoration and Management of a Degraded Baldcypress Swamp and Freshwater Marsh in Coastal Louisiana

Cited by 11 publications

References 48 publications

Land Suitability Analysis of Alvar Grassland Vegetation in Estonia Using Random Forest

Land Suitability Analysis of Alvar Grassland Vegetation in Estonia Using Random Forest

Groundwater Hydrochemical Zoning in Inland Plains and its Genetic Mechanisms

Assessing Resilience and Sustainability of the Mississippi River Delta as a Coupled Natural-Human System

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