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 Technical agency Draft Recovery Plan for the Atlantic Salt Marsh Snake Nerodia Clarkii Taeniata written by Paul E. Moler and published by . This book was released on 1993 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Recovery Plan for the Atlantic Salt Marsh Snake Nerodia Clarkii Taeniata written by U.S. Fish and Wildlife Service. Region 4 and published by . This book was released on 1993 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Natural History and Spatial Analysis of the Atlantic Salt Marsh Snake Nerodia Clarkii Taeniata COPE in Canaveral National Seashore Florida written by Constance Lynn Cassler and published by . This book was released on 2000 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aquatic Sciences and Fisheries Abstracts written by and published by . This book was released on 1994-07 with total page 756 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 Nerodia Clarkii Salt Marsh Snake written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Features Nerodia clarkii, the salt marsh snake, provided by Texas Memorial Museum of the University of Texas at Austin. Discusses the snake's size, color, and range in Texas.
Download or read book Ecological Genetics of the Salt Marsh Snake Nerodia Clarkii written by Kevin P. Jansen and published by . This book was released on 2001 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Annual Index written by and published by . This book was released on 1992 with total page 1728 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
Download or read book An Investigation of the Genetic and Ecological Status of the Carolina Salt Marsh Snake Nerodia Sipedon Williamengelsi written by Rufus Wharton Gaul and published by . This book was released on 1996 with total page 140 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 Tidal Salt Marshes of the Southeast Atlantic Coast written by Richard G. Wiegert and published by . This book was released on 1990 with total page 84 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 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 The Ecology of New England High Salt Marshes written by Scott W. Nixon and published by . This book was released on 1982 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Predatory Success as a Function of Habitat Structural Complexity in the Mangrove Salt Marsh Snake Nerodia Clarkii Compressicauda Baird and Girard written by Stephen J. Mullin and published by . This book was released on 1992 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
