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Product American Black Duck Decision Support Tool
by Rhishja Cota — published Nov 09, 2022 — last modified Jul 26, 2023 12:14 PM — filed under: , , , , , , , , , , , , , , , ,
The Atlantic Coast Joint Venture Black Duck Decision Support Tool (DST) helps to identify the exact number of acres to protect, restore or maintain at the small watershed scale. Through this tool, land managers can determine the best way to contribute to achieving black duck goals anywhere on the landscape.
Located in Information Materials / Research / Peer-reviewed Science
Habitat Selection, Movements, and Home Range of Bog Turtles in SE PA and Investigation of Grazing as a Management Tool
by Jason Tesauro — published Oct 28, 2022 — last modified Jul 24, 2023 11:24 AM — filed under: , , , , ,
Located in Information Materials / Research / WLFW Outcomes: Funded Research
Project Range-wide assessment of grazing and hydrology in bog turtle wetlands
by Bridgett Costanzo — published Oct 28, 2022 — last modified Jul 24, 2023 11:25 AM — filed under: , , , , ,
In December 2018, a meeting of bog turtle experts was hosted in Richmond, VA and experts across the Eastern range of the species identified as a high priority the need to better understand the benefits and potential negative impacts of livestock grazing in bog turtle inhabited wetlands. Hydrologic conditions in bog turtle wetlands emerged as a secondary concern needing more research. Recently, NRCS’ Conservation Effects Assessment Project (CEAP) awarded funds to Dr. Carola Haas leading a team of researchers at Virginia Tech University to conduct an assessment on these two topics (grazing and hydrology).
Located in Information Materials / Research / WLFW Outcomes: Funded Research
File NRCS WLFW Outcomes Assessment 2012-2018 (released 2021)
by Bridgett Costanzo — published Oct 28, 2022 — last modified Jul 24, 2023 11:26 AM — filed under: , , , , , , , , , ,
An outcomes assessment report completed under a contract to Dr. JJ Apodaca from NRCS-WLFW. This document is being shared with conservation partners but broad or public sharing is not approved.
Located in Information Materials / Research / WLFW Outcomes: Funded Research
Product The Effects of Livestock Grazing on the Bog Turtle
by Rhishja Cota — published Nov 08, 2022 — last modified Jul 24, 2023 11:27 AM — filed under: , , , , , , , , , , ,
The demise of small-scale dairy farming over the past three decades has led to the pastoral abandonment of the majority of bog turtle habitats in the Northeast. As a consequence, habitats are being degraded by the growth of invasive flora, changes in hydrology, and the loss of turtle microhabitats created by livestock.
Located in Information Materials / Research / Peer-reviewed Science
Product Grazing for Bog Turtle Habitat Management: Case Study of a New York Fen
by Rhishja Cota — published Nov 08, 2022 — last modified Jul 24, 2023 11:28 AM — filed under: , , , , , , , , , , , ,
This study presents results from a single wetland complex in New York, USA, which we managed primarily with cattle grazing over four and a half growing seasons. Management effectiveness was assessed by monitoring Bog Turtle nest placement, habitat use via radio tracking, and vegetation structure and composition change in permanent plots.
Located in Information Materials / Research / Peer-reviewed Science
Product Effects of Habitat Alterations on Bog Turtles (Glyptemys muhlenbergii): A Comparison of Two Populations
by Rhishja Cota — published Nov 08, 2022 — last modified Jul 24, 2023 11:29 AM — filed under: , , , , , , , , , , , , ,
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).
Located in Information Materials / Research / Peer-reviewed Science
Livestock as a Potential Biological Control Agent for an Invasive Wetland Plant
by Jason Tesauro — published Oct 28, 2022 — last modified Jul 24, 2023 11:30 AM — filed under: , , , , ,
Located in Information Materials / Research / Peer-reviewed Science
Population Genetics of the Eastern Hellbender (Cryptobranchus alleganiensis alleganiensis) across Multiple Spatial Scales
by Shem D. Unger, Olin E. Rhodes Jr, Trent M. Sutton, Rod N. Williams — published Feb 10, 2023 — last modified Jul 26, 2023 01:36 PM — filed under: , , , , ,
Conservation genetics is a powerful tool to assess the population structure of species and provides a framework for informing management of freshwater ecosystems. As lotic habitats become fragmented, the need to assess gene flow for species of conservation management becomes a priority. The eastern hellbender (Cryptobranchus alleganiensis alleganiensis) is a large, fully aquatic paedamorphic salamander. Many populations are experiencing declines throughout their geographic range, yet the genetic ramifications of these declines are currently unknown. To this end, we examined levels of genetic variation and genetic structure at both range-wide and drainage (hierarchical) scales. We collected 1,203 individuals from 77 rivers throughout nine states from June 2007 to August 2011. Levels of genetic diversity were relatively high among all sampling locations. We detected significant genetic structure across populations (Fst values ranged from 0.001 between rivers within a single watershed to 0.218 between states). We identified two genetically differentiated groups at the range-wide scale: 1) the Ohio River drainage and 2) the Tennessee River drainage. An analysis of molecular variance (AMOVA) based on landscape-scale sampling of basins within the Tennessee River drainage revealed the majority of genetic variation (∼94–98%) occurs within rivers. Eastern hellbenders show a strong pattern of isolation by stream distance (IBSD) at the drainage level. Understanding levels of genetic variation and differentiation at multiple spatial and biological scales will enable natural resource managers to make more informed decisions and plan effective conservation strategies for cryptic, lotic species.
Located in Information Materials / Research / Peer-reviewed Science
Importance of demographic surveys and public lands for the conservation of eastern hellbenders Cryptobranchus alleganiensis alleganiensis in southeast USA
by Michael J. Freake, Christopher S. DePerno — published Feb 10, 2023 — last modified Jul 26, 2023 01:37 PM — filed under: , , , , ,
Comparisons of recent and historic population demographic studies of eastern hellbenders Cryptobranchus alleganiensis alleganiensis have identified significant population declines and extirpations associated with habitat degradation, poor water quality and disease, leading to nomination as a candidate for listing under the Endangered Species Act. However, populations in the southern Appalachian region of the range have received less attention despite relatively high levels of watershed protection due to the establishment of federally protected National Forest and National Park public lands. These watersheds likely represent some of the best remaining available habitat, yet the lack of published studies make assessment of population stability and viability very difficult. Our objectives were to (1) conduct a capture-mark-recapture (CMR) demographic study and a point transect survey on the Hiwassee River in Tennessee which is designated a National Scenic River, and is largely contained within the Cherokee National Forest, (2) quantify the size structure of the population, (3) compare abundance, survival and recruitment with historic and contemporary hellbender populations across the range, (4) assess the importance of this population and the significance of National Forest and National Park lands in the context of hellbender population conservation in the southeastern United States. We detected all age classes present, with larval hellbenders comprising 21.5% of captures. Using a combination of static life table and CMR methods, we determined that survival rates during the first year were low (~10%), but were high (68–94%) for taggable sized hellbenders. Density of hellbenders at the study site was very high (84 taggable sized hellbenders per 100m of river) compared to recent demographic studies conducted in other regions of the range. We detected hellbenders over ~28 km of river, with a mean density of 23 taggable sized hellbenders per 100m of river, and a total population estimate of 6440 taggable hellbenders. National Forest and National Park lands are likely to continue to play a particularly important role in providing suitable habitat for hellbenders in the southern Appalachians. In fact, only six of 21 known hellbender locations in Tennessee appear to show consistent larval recruitment, all of which are located within or adjacent to National Forest or National Park land.
Located in Information Materials / Research / Peer-reviewed Science