Download or read book Open Marsh Water Management for Salt Marshes in Rye New Hampshire written by Sarah T. MacGregor and published by . This book was released on 1990 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Open Marsh Water Management written by Thomas Hruby and published by . This book was released on 1985 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: "In 1982 the Massachusetts Audubon Society, the Essex County Mosquito Control Project, and the Manomet Bird Observatory began a research program to adopt OMWM [Open Marsh Water Management] for mosquito control on New England salt marshes. The methods we have developed are presented in this manual for those who would like to practice OMWM in Massachusetts and other areas of the Northeast. Step by step procedures are outlined and several options are described."--Leaf I-1.
Download or read book A Study to Initiate an Open Marsh Water Management Plan for Mosquito Control written by University of New Hampshire. Jackson Estuarine Laboratory and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Some Effects of Open Marsh Water Management on Submerged Aquatic Vegetation in Two Delaware Salt Marshes written by Lynn Alexander Mahaffy and published by . This book was released on 1986 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effect of Open Marsh Water Management Practices on the Carbon Balance of Tidal Marshes in Barnegat Bay New Jersey written by Elisabeth Brighton Powell and published by . This book was released on 2018 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: Salt marshes have been modified for mosquito control since the early 1900s. Open marsh water management (OMWM) is a mosquito control technique first applied in New Jersey in the 1950s. It has been extensively used in the mid-Atlantic and also in Massachusetts, New York, Connecticut, Florida, and Louisiana. This practice involves excavation of areas of marsh, constructing shallow ponds to provide habitat for mosquito larvae-eating fish with the goal of reducing mosquito populations. Nearly half of Barnegat Bay, New Jersey’s coastal marshes have been subject to OMWM since 1976, and its effects on ecosystem function are not well understood. Here, we assess the impacts of OMWM on the carbon balance of salt marshes associated with the conversion of intact vegetation to open water ponds. Using a precise object-based image analysis classification technique, we found that over 7,000 ponds, approximately 3% of Barnegat Bay’s coastal marshes, have been constructed for mosquito control. Using state of the art IR technology to examine in-situ greenhouse gas fluxes in Barnegat Bay, we found evidence to suggest that the conversion from intact plants to open water ponds negatively shifted the carbon balance of the salt marsh, both within the footprint of the constructed pond as well as within the area where deposition of sediment has prevented the recolonization of marsh vegetation. We conclude that this management technique has significantly reduced the carbon sequestration capacity of Barnegat Bay’s tidal wetlands.
Download or read book Open Marsh Water Management on Great South Bay Islip New York written by and published by . This book was released on 1986 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Salt Marsh Bird Community Responses to Open Marsh Water Management written by Margaret A. Pepper and published by ProQuest. This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Salt marshes are productive ecosystems that provide critical breeding and foraging habitat for many bird species. Open marsh water management (OMWM), a method of mosquito abatement through habitat alteration, is a widely practiced management technique in Mid-Atlantic salt marshes. Although OMWM may alleviate the need for pesticide applications, the effect of these habitat modifications on obligate salt marsh breeding birds is not fully understood and remains an information priority for the United States Fish & Wildlife Service National Wildlife Refuge System. My objectives were to; (1) develop a method to quantify OMWM, (2) use an index of marsh bird community integrity to evaluate the effect of OMWM, and (3) determine the impacts of OMWM on Seaside Sparrow reproductive success and nesting ecology. I searched for and monitored nesting birds, performed callback and passive surveys, and estimated vegetation cover on 19 plots (1-3ha) within tidal marshes in Sussex County, Delaware in May-August 2006-2007. I categorized plots as limited (n = 10) or extensive OMWM (n = 9) based on the level of OMWM manipulations. I detected 29 species across all surveyed plots, but detected no difference in species richness between limited and extensive OMWM (P = 0.145). I defined four avian guilds: salt marsh obligates, wetland generalists, shorebirds, and gulls/terns to compare avian communities between limited and extensive OMWM. Only the relative abundance of the salt marsh obligate guild differed between limited and extensive OMWM and was more than 1.5 greater on limited OMWM sites than extensive sites (P = 0.015). Relative abundance of Seaside Sparrows was 2.5 times greater on limited OMWM than on extensive OMWM (P = 0.002). Seaside Sparrow territory density (P = 0.002) and nesting density (P = 0.031) was also 2 times greater on limited OMWM plots than extensive OMWM plots. Nest survival rates were similar (P = 0.584). However, when comparing measures of productivity between limited and extensive OMWM, I found the number of Seaside Sparrow eggs/ha (P = 0.026) and fledglings/ha (P = 0.053) were greater on limited OMWM plots. Seaside Sparrow nest survival rates did not differ between levels of OMWM, but reproductive output was greater on areas with limited OMWM. OMWM does not appear to benefit most marsh bird species or guilds, but may negatively impact populations of salt marsh obligate species and Seaside Sparrows. OMWM may be used as an alternative means of mosquito control, but should not be considered a method of habitat enhancement for obligate salt marsh bird species. Refuges concerned with protecting populations of Seaside Sparrows or other salt marsh obligate birds should limit amounts OMWM in high breeding areas.
Download or read book A Study of the Effects of Three Mosquito Control Marsh Management Techniques on Selected Parameters of the Ecology of a Chesapeake Bay Tidewater Marsh in Maryland written by Cyrus R. Lesser and published by . This book was released on 1982 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt: "A study was conducted to determine the effects of three mosquito control marsh management techniques on selected parameters of the ecology of a Distichlis spicata/Spartina patens dominated marsh in Somerset County, Maryland. The three water management techniques evaluated were: (1) open plot - ditches coupled to the estuary to allow unrestricted tidal exchange; (2) water control - structures placed in the outlet ditches to restrict tidal exchange; and (3) closed - not connected to the estuary by ditches. Two unditched areas served as controls."--Leaf iii.
Download or read book Open Marsh Water Management for Open Tidal Marshes in the Northeast written by Thomas Hruby and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Open Marsh Water Management for Tidal Marshes in the Northeast written by Thomas Hruby and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Manual of Methods for Open Marsh Water Management in Rhode Island written by George D. Christie and published by . This book was released on 1990 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Utilization of Open Marsh Water Management Ditches by the Threatened Atlantic Salt Marsh Snake nerodia Clarkii Taeniata written by Gary T. Goode and published by . This book was released on 1992 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydrology of Two Tidal Marshes in North Carolina where Open marsh Water Management Modifications Have Been Implemented written by B. F. Pope and published by . This book was released on 1993 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydrology of Two Tidal Marshes in North Carolina where Open marsh Water Management Modifications Have Been Implemented written by Benjamin F. Pope and published by . This book was released on 1993 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monitoring the Effects of an Open Marsh Water Management Project at Waterford Town Beach written by Judith Ann Kownacki Wrenn and published by . This book was released on 2003 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Tidal Marsh Restoration written by Charles T. Roman and published by Island Press. This book was released on 2012-08-07 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many coastal tidal marshes have been significantly degraded by roadways and other projects that restrict tidal flows, limiting their ability to provide vital ecosystem services including support of fish and wildlife populations, flood protection, water quality maintenance, and open space. Tidal Marsh Restoration provides the scientific foundation and practical guidance necessary for coastal zone stewards to initiate salt marsh tidal restoration programs. The book compiles, synthesizes, and interprets the current state of knowledge on the science and practice of salt marsh restoration, bringing together leaders across a range of disciplines in the sciences (hydrology, soils, vegetation, zoology), engineering (hydraulics, modeling), and public policy, with coastal managers who offer an abundance of practical insight and guidance on the development of programs. The work presents in-depth information from New England and Atlantic Canada, where the practice of restoring tidal flow to salt marshes has been ongoing for decades, and shows how that experience can inform restoration efforts around the world. Students and researchers involved in restoration science will find the technical syntheses, presentation of new concepts, and identification of research needs to be especially useful as they formulate research and monitoring questions, and interpret research findings. Tidal Marsh Restoration is an essential work for managers, planners, regulators, environmental and engineering consultants, and others engaged in planning, designing, and implementing projects or programs aimed at restoring tidal flow to tide-restricted or diked salt marshes.
Download or read book SALT MARSH MOSQUITO DITCH ALTERATIONS ECOLOGICAL IMPACTS AND PERSPECTIVES IN MANAGEMENT DECISIONS written by Casey B Nolan and published by . This book was released on 2018 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: Salt marsh ecosystems are prized for the numerous ecological and economic services that benefit society. On the U.S. east coast, virtually all salt marsh habitat from Maine to Virginia has been hydrologically degraded by the creation of mosquito ditches. In the 1930s, mosquito ditches were excavated throughout marshes to drain standing water and reduce mosquito breeding habitat. Investigations of mosquito ditches found that ditching had including lowered water tables and salinities, changed plant communities, and reduced habitat for fish and waterfowl species. A large scale effort to fill mosquito ditches and restore natural hydrology is on-going at Assateague Island National Seashore, Maryland. I investigated the impact of ditch filling at Assateague on plant species Spartina alterniflora and Salicornia. The percent cover and occupancy of Spartina alterniflora and the occupancy of Salicornia species were similar between ditched and unditched salt marshes before ditch filling was conducted. Following ditch filling, there was little evidence that ditch filling altered percent cover and occupancy in an ecologically meaningful way. I also tested the hypothesis that ditch filling would lower salinities in unvegetated marsh panne habitat and facilitate the establishment of S. alterniflora using transplants. Ditch filling did not appear to alter porewater salinities and though transplant survivorship was generally low across all marsh types, transplants in ditch-filled marshes exhibited 20% greater annual survivorship compared to ditched marshes. In a broader context, filling ditches is one of several ways to alter mosquito ditches for a desired hydrological impact. Ditch plugging, Open Marsh Water Management, and ditch remediation have also been used to alter marsh hydrology in order to achieve management desires. However, each technique involves uncertainty in outcome and impacts both in the short and long term. Practitioners of these techniques were interviewed to describe their approach towards this uncertainty and how they evaluated risk-versus-reward scenarios. Practitioners expressed similar responses towards approaching the ecological uncertainty of these techniques. Each championed the notions of starting pilot studies before larger efforts were initiated, the importance of ecosystem processes (such as vertical accretion), and that uncertainty in outcome should not inhibit trial-and-error approaches to restoring salt marsh hydrology.
