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Keyword: rare species

Rare carnivore detections from environmental DNA in snow

Media Gallery Posted on: September 05, 2019
A new project showed that animal footprints in snow contain enough DNA for species identification, even when the snow was many months old. The study extracted DNA from snow samples collected within animal tracks as well as areas where the animal had been photographed months earlier. Newly developed genetic assays were applied and positively detected the DNA of each species, performing nearly flawlessly on samples previously considered too poor to provide usable DNA. This method could revolutionize winter surveys of rare species by greatly reducing or eliminating misidentifications and missed detections.

Rare carnivore detections from environmental DNA in snow

Science Spotlights Posted on: September 05, 2019
A new project showed that animal footprints in snow contain enough DNA for species identification, even when the snow was many months old. The study extracted DNA from snow samples collected within animal tracks as well as areas where the animal had been photographed months earlier. Newly developed genetic assays were applied and positively detected the DNA of each species, performing nearly flawlessly on samples previously considered too poor to provide usable DNA. This method could revolutionize winter surveys of rare species by greatly reducing or eliminating misidentifications and missed detections.

The importance of sound methodology in environmental DNA sampling

Publications Posted on: May 21, 2018
Environmental DNA (eDNA) sampling - which enables inferences of species’ presence from genetic material in the environment - is a powerful tool for sampling rare fishes. Numerous studies have demonstrated that eDNA sampling generally provides greater probabilities of detection than traditional techniques (e.g., Thomsen et al. 2012; McKelvey et al. 2016; Valentini et al. 2016; Wilcox et al. 2016). In contrast, Ulibarri et al.

Detecting rare species using environmental DNA

Projects Posted on: September 23, 2015
External DNA released by animals in aquatic environments, called environmental DNA (eDNA), can be used to determine whether a species is present without actually capturing or seeing an individual. Because of its greater efficiency and reduced cost, eDNA sampling may revolutionize the monitoring and assessment of freshwater species.

Detecting rare species using environmental DNA

Documents and Media Posted on: December 03, 2014
Animals in aquatic environments—such as fish, amphibians, crayfish, and mussels—release DNA into the water via their feces, urine, and skin. This external DNA is called environmental DNA (eDNA). By filtering water samples and analyzing them for eDNA, one can determine whether a species is present without actually capturing or seeing an individual. Different species can be identified by using genetic markers that are unique to them. Document Type: Briefing Papers

Optimizing study design for multi-species avian monitoring programmes

Publications Posted on: October 01, 2014
Many monitoring programmes are successful at monitoring common species, whereas rare species, which are often of highest conservation concern, may be detected infrequently.

Robust detection of rare species using environmental DNA: The importance of primer specificity

Publications Posted on: April 29, 2013
Environmental DNA (eDNA) is being rapidly adopted as a tool to detect rare animals. Quantitative PCR (qPCR) using probebased chemistries may represent a particularly powerful tool because of the method's sensitivity, specificity, and potential to quantify target DNA. However, there has been little work understanding the performance of these assays in the presence of closely related, sympatric taxa.

GSD Update: All together now: Collaboration in research and stewardship for our 21st century lands

Publications Posted on: July 31, 2012
Collaboration is the way the USDA Forest Service operates in this new era, where the challenges in our natural world - to soil, air, plants, animals, watersheds - require the talents of devoted scientists, managers, citizens, communities. Conservation of terrestrial and aquatic ecosystems depends on the success of these networks of involved participants in finding answers to present and future problems.