Folders: ROOT > ScienceBase Catalog > Northern Prairie Wildlife Research Center > Terns and Plovers ( Show all descendants )
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The Army Corps of Engineers recently initiated a program to create and improve emergent sandbar habitat (hereafter ESH) throughout the upper Missouri River system. This program has resulted in creation of three sandbar complexes and implementation of vegetation control on existing sandbars in the Gavins Point reach during 2004 and 2005. In order to meet habitat acreage goals in the Biological Opinion, the Corps has developed extensive plans for numerous additional habitat creation and improvement projects throughout the upper Missouri River system. Given the momentum of current habitat creation and improvement projects and their associated costs, it is imperative that the capacity be available to quantify changes...
Categories: Project
Piping plovers ( Charadrius melodus) are a Federally threatened shorebird that breeds in three principal habitat types in the Northern Great Plains (NGP): reservoir shorelines, alkali wetlands (including managed impoundments on refuges and isolated wetlands on private lands), and midchannel emergent sandbars on major river systems in the Missouri River Basin. However, the long-term concurrent mark-recapture programs on the Missouri River have thus far been limited to the lower Missouri and Platte rivers, a region that represents only one of the three primary habitat types (e.g. midchannel emergent sandbars). In contrast, the northern Missouri River system (e.g. Lake Oahe north to the Garrison dam, Lake Sakakawea,...
Categories: Project
Lake Sakakawea is a large (404,810 ac [163,800 ha]) reservoir located on the Missouri River in northwestern and central North Dakota, which recently was designated a high priority area for endangered species management. The reservoir shoreline is irregular, dissected, and consists of a wide variety of substrates, slopes, and aspects. The extent, distribution, and abundance of these features vary annually as lake elevation changes in response to precipitation, melt of Rocky Mountain snowpack, and releases from Garrison and Fort Peck dams. Water levels on Lake Sakakawea have declined over the past decade due to extended drought conditions; in 2005 they reached a record low since the initial flooding of the reservoir....
Categories: Project
This task focuses on least tern use of natural, restored, and newly created habitats under the Emergent Sandbar Habitat program on the Gavins Point reach. It is designed to fully integrate with a concurrent study of piping plover productivity and foraging ecology for the same river reach. The goal of this task is to provide information on the breeding population and success of least terns and a rigorous scientific evaluation of the value of restored and created sandbar habitat for meeting productivity goals for interior least terns. [see Narratives for more information.]
Categories: Project
Federally listed least terns ( Sternula antillarum) and piping plovers ( Charadrius melodus) nest in spatially and temporally variable riverine, sandbar and shoreline habitats in the North American midcontinent. In a naturally functioning river system, sand is eroded, transported, and deposited by seasonally variable flows, creating and maintaining emergent sandbars. However, operation of dams on the Missouri River has attenuated peak spring flows, resulting in declines in abundance and quality of unvegetated sandbar habitats favored by nesting terns and plovers. The Missouri River Flood of 2011 was a historically and ecologically significant event in which summer flows exceeded all historical records for the post-dam...
Categories: Project
Prior to human alteration, the Platte River probably supported nesting least terns and piping plovers on mid-channel sandbars that were largely devoid of vegetation due to high spring flows. Modification of the river’s flow pattern has lowered the frequency and intensity of scouring events, resulting in vegetation encroachment and stabilization of sandbars. This has led to declining quality and abundance of unvegetated sand nesting habitat favored by least terns and piping plovers. Foraging habitat for piping plovers, consisting of sparsely vegetated moist or dry sand with high invertebrate production, has probably also declined in quality and abundance. However, least terns forage on small fish in side channels,...
Categories: Project
Preliminary data summaries of least tern movement data from SubTask 7.1 suggest nocturnal detections of radiomarked terns away from nesting colonies are substantially greater than expected. Additionally, movements of terns from colonies (nocturnal and diurnal) exhibit greater variability and include a greater spatial extent than reported previously. The timing, resolution, and scale at which movements occur in relation to nesting locations were unanticipated and are inconsistent with scientific publications on least tern behavior and foraging ecology. As behavioral observations under SubTask 1 have been limited to daylight hours, inference and motivations for nocturnal activity and colony departures are unknown....
Categories: Project
Evaluating, quantifying, or defining, human disturbance (passive, recreational and research) during research of wildlife species is frequently ignored or considered inconsequential. Scientists generally agree that excessive disturbance, although an undefined quantity, can influence research results by (1) altering behavior of the research subjects, (2) affecting availability of their resources, and in some severe cases, (3) causing death or lost reproductive opportunities. These effects are particularly critical to research and management of species listed under the Endangered Species Act, for which animal welfare and successful reproduction is a prime concern. On the upper Missouri River south of the Gavins Point...
Categories: Project
Categories: Project
Reliable ongoing monitoring of piping plover and least tern nests is crucial to assuring that protection efforts are contributing effectively and efficiently to recovery of these species. An annual inventory of the numbers, location, and productivity of breeding pairs will provide information on population trends, changes in distribution, recruitment, and other population parameters. Additionally, data collected at unsuccessful nests will provide insights to the causes of failures. These data will provide measures of overall progress towards recovery and facilitate identification of areas where additional management or protection needs to be applied. Monitoring to identify factors that may be limiting the species’...
Categories: Project
This is a new Technical Assistance task being developed with the U.S. Fish and Wildlife Service and cooperating partners. This information will be updated as the project proposal is developed. The U.S. Fish and Wildlife Service (USFWS) in collaboration with Michigan Department of Natural Resources (DNR) propose vegetation control efforts to restore beach and dune habitat within Wilderness State Park (WSP). During the last ~20 years, Waugoshance Point within WSP has seen colonization by several invasive plant species, including spotted knapweed (Centaurea maculosa), sweet-clover (Melilotus spp.), and most recently, phragmites (Phragmites australis). Due to reduced lake elevation and associated reductions in winter...
Categories: Project
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