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Delaware 587: Structure for Water Control
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This standard allows for the installation of a water control structure to provide the manipulation of water levels. The ability to control water levels in a shallow water waterfowl impoundment can allow for proper moist soil management techniques.
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Information Materials
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NRCS Conservation Practices & Materials
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Conservation Practices
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Delaware 644: Wetland Wildlife Habitat Management
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This practice is supplemented with other wetland standards to provide financial assistance in the management of a wetland for wildlife habitat.
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Information Materials
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NRCS Conservation Practices & Materials
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Conservation Practices
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Delaware 645: Upland Wildlife Habitat Management
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This practice consists of the management of food, cover, and shelter for wildlife which can be utilized for waterfowl nesting habitat.
Located in
Information Materials
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NRCS Conservation Practices & Materials
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Conservation Practices
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Delaware 646: Shallow Water Development and Mangement
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This practice is supplemented in the creation of a shallow water impoundment for waterfowl.
Located in
Information Materials
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NRCS Conservation Practices & Materials
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Conservation Practices
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Delaware 657: Wetland Restoration
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This standard consists of returning a wetland and its functions to a close representation of its original condition prior to being disturbed. It applies for areas with hydric soils that have been converted to non-wetland by filling, draining, or other hydrology changes.
Located in
Information Materials
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NRCS Conservation Practices & Materials
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Conservation Practices
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Delaware NRCS Wetland Restoration Practice #657
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Located in
Information Materials
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NRCS Conservation Practices & Materials
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Conservation Practices
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Distribution of the American Black Duck
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Distribution of the American Black Duck. This species breeds locally South to the dashed line.
Located in
Black-Duck-site-images
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Ducks Unlimited: Delaware, Maryland, and West Virginia 2021 Conservation Report
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2021 Conservation Report from Ducks Unlimited
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Information Materials
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Published materials
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Effects of Habitat Alterations on Bog Turtles (Glyptemys muhlenbergii): A Comparison of Two Populations
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This study compared Bog Turtle population demography and habitat use from 1994 to 2009 at two sites in Massachusetts, USA: one site was managed for nonnative invasive species and natural succession (Site 1), and the other site was flooded from American Beaver (Castor canadensis) activity resulting in an expansion of nonnative invasive plants (Site 2).
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Research
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Peer-reviewed Science
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Environmental DNA improves Eastern Hellbender (Cryptobranchus alleganiensis alleganiensis) detection over conventional sampling methods
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Effective conservation planning relies on accurate species detection. However, conventional sampling methods used for detecting rare and cryptic aquatic species suffer from low probabilities of detection. Environmental DNA (eDNA) has emerged as an innovative and powerful sampling tool for detecting aquatic species, with previous studies suggesting a detection advantage over conventional sampling. However, comparative studies often fail to consider the appropriate sampling frameworks to adequately compare sampling methodologies and account for the influence of environmental variables on eDNA detection probabilities. In this study, we paired two detection methods (eDNA and physical sampling) at 22 sites in West Virginia, USA, to compare the probability of detecting a cryptic, elusive, and imperiled species of giant salamander, the Eastern Hellbender (Cryptobranchus alleganiensis alleganiensis). We used a multimethod occupancy modeling framework to compare method‐specific detection probabilities using a suite of predictor variables based on environmental conditions thought to influence hellbender detection. We detected hellbenders at 19/22 sites using eDNA and at 13/22 sites using physical sampling methods. The best supported model indicated that detection probability for eDNA (0.84 ± 0.06) was three times higher than conventional methods (0.28 ± 0.07). Water turbidity was the best predictor of hellbender detection and negatively impacted our ability to detect eDNA. We failed to detect an association between eDNA concentration and hellbender catch per unit effort. Our study supports previous findings that suggest eDNA sampling methods greatly increase the probability of detecting aquatic species. However, with little known about the influence of environmental variables on eDNA detection, our results highlight the negative influence turbidity and other physiochemical factors have on eDNA detection and suggest that further research on eDNA detection in turbid environments is needed.
Located in
Research
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Peer-reviewed Science
