The conservation of urban marine/estuarine wetlands-conflicts and resolutions

2004 ◽  
pp. 190-194
Author(s):  
Pat Hutchings
Keyword(s):  
Estuarine Wetlands

scholarly journals A Case Study of the Effects of Management Interventions on the Phosphorus Dynamics at a Coastal, Eutrophic, Caribbean lagoon (Laguna Cartagena, Puerto Rico)

Water ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 449
Author(s):  
Yashira Marie Sánchez Colón ◽  
Fred Charles Schaffner
Keyword(s):  
Puerto Rico ◽  
Water Column ◽  
Water Levels ◽  
Wildlife Habitat ◽  
Freshwater Wetland ◽  
Water Level Fluctuations ◽  
Phosphorus Loading ◽  
Estuarine Wetlands ◽  
Management Interventions ◽  
Management Recommendations

Laguna Cartagena is a coastal, eutrophic, shallow lake and freshwater wetland in southwestern Puerto Rico, managed by the US Fish and Wildlife Service. This ecosystem has been impacted by phosphorus loading from adjacent agricultural areas since the 1950s, causing eutrophication and deteriorating wildlife habitats. Herein, we describe phosphorus input and export during September 2010–September 2011 (Phase One) and October 2013–November 2014 (Phase Two). These two phases bracket a period of intensified management interventions including excavation and removal of sediment and vegetation, draining, and burning during the summers of 2012 and 2013. Results indicate that Laguna Cartagena retains a phosphorus (sink) in its sediments, and exhibits nutrient-releasing events (source, mainly total phosphorus) to the lagoon water column, which are associated with rainfall and rising water levels. External factors including water level fluctuations and rainfall influenced phosphorus export during Phase One, but after management interventions (Phase Two), internal processes influenced sink/source dynamics, releasing elevated phosphorus concentrations to the water column. When exposed sediments were re-flooded, phosphorus concentrations to the water column increased, releasing elevated P concentrations downstream to an estuarine wetlands area and the Caribbean Sea. Herein we offer management recommendations to optimize wildlife habitat without elevating phosphorus concentrations.

scholarly journals Construction of a Near-Natural Estuarine Wetland Evaluation Index System Based on Analytical Hierarchy Process and Its Application

Water ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2116
Author(s):  
Jiajun Sun ◽  
Yangyang Han ◽  
Yuping Li ◽  
Panyue Zhang ◽  
Ling Liu ◽  
...  
Keyword(s):  
Ecological Restoration ◽  
Water Purification ◽  
Analytical Hierarchy Process ◽  
Index System ◽  
Evaluation System ◽  
Positive Impact ◽  
Environmental Benefits ◽  
Estuarine Wetland ◽  
Estuarine Wetlands ◽  
Hierarchy Process

Nutrients carried in upstream rivers to lakes are the main cause of eutrophication. Building near-natural estuarine wetlands between rivers and lakes is an effective way to remove pollutants and restore the ecology of estuarine areas. However, for the existing estuarine wetland ecological restoration projects, there is a lack of corresponding evaluation methods and index systems to make a comprehensive assessment of their restoration effects. By summarizing a large amount of literature and doing field research, an index system was constructed by combining the characteristics of the near-natural estuarine wetlands themselves. It covered environmental benefits, technical management and maintenance, and socio-economic functions, and contained 3 systems, 7 criteria, and 16 indicators. The analytical hierarchy process (AHP) was used to determine the weights of each indicator. The top 5 indicators in order of importance were habitat diversity, total phosphorus (TP), coverage of aquatic plants, ammonia nitrogen (NH3-N), and adaptation to the surrounding landscape. The above evaluation system was used for the comprehensive evaluation of the water purification project in the Fuhe estuarine wetland, Hebei Province, as an example. The results showed that the comprehensive score of the Fuhe estuarine wetland at this stage was 4.1492, and the evaluation grade was excellent. The effect of water purification and ecological restoration was good, and the selected technology was suitable and stable in operation. It had a greater positive impact on the surrounding economy and society and can be promoted and applied. The research results were important for clarifying the advantages and defects of the project and developing efficient and advanced restoration technologies.

Using Gene Expression to Assess the Status of Fish from Anthropogenically Influenced Estuarine Wetlands

2011 ◽  
Vol 46 (1) ◽  
pp. 69-77 ◽  
Author(s):  
Doris E. Vidal-Dorsch ◽  
Steven M. Bay ◽  
Monica A. Mays ◽  
Darrin J. Greenstein ◽  
Diana Young ◽  
...  
Keyword(s):  
Gene Expression ◽  
Estuarine Wetlands ◽  
The Status

Ecology of Freshwater and Estuarine Wetlands

2008 ◽  
Vol 53 (3) ◽  
pp. 635-635
Author(s):  
Mark Huxham
Keyword(s):  
Estuarine Wetlands

Effects of Ecological Restoration on Trophic Dynamics in Estuarine Wetlands

Wetlands ◽  
2021 ◽  
Vol 41 (1) ◽  
Author(s):  
Haitao T. Wu ◽  
Mengyao Y. Yang ◽  
Kangle L. Lu ◽  
Darold P. Batzer
Keyword(s):  
Ecological Restoration ◽  
Trophic Dynamics ◽  
Estuarine Wetlands

Dispersal of the Mosquito Aedes vigilax (Diptera: Culicidae) From Urban Estuarine Wetlands in Sydney, Australia

2019 ◽  
Vol 56 (5) ◽  
pp. 1290-1295 ◽  
Author(s):  
Cameron E Webb ◽  
Richard C Russell
Keyword(s):  
Public Health ◽  
Coastal Wetlands ◽  
Mosquito Control ◽  
Health Impacts ◽  
Buffer Zones ◽  
Release Point ◽  
Estuarine Wetlands ◽  
Aedes Vigilax ◽  
Increased Risk ◽  
Sydney Australia

Abstract Aedes vigilax (Skuse) is a pest and vector species associated with coastal wetlands and the abundance of this mosquito has been identified as contributing to increased risk of mosquito-borne disease outbreaks. As urban development continues to encroach on these coastal wetlands, pest and public health impacts are becoming of increasing concern and in the absence of broadscale mosquito control. Urban planners are looking to buffer zones and other land use planning options to minimize contact between mosquitoes and humans but gaps in the understanding of dispersal ranges of mosquitoes hamper the adoption of these strategies. A mark-release-recapture experiment was conducted to measure the dispersal of this mosquito from an urban estuarine wetland in Sydney, Australia. An estimated total of over 150,000 wild caught female mosquitoes were marked with fluorescent dust and then released. A network of 38 traps was then operated for 5 d within an area of 28 km2. A total of 280 marked mosquitoes was recaptured, representing less than 1% of the estimate 250,000 marked mosquitoes released. Marked mosquitoes were recaptured up to 3 km from the release point, providing an insight into the dispersal range of these mosquitoes. The mean distance traveled by marked mosquitoes was 0.83 km, a result reflecting the greater proportion of marked mosquitoes recaptured near release point. The findings of this study indicate that effective buffer zones between estuarine wetlands and high-density urban developments would be an impractical approach to minimizing pest and public health impacts associated with this mosquito.

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