Highlighting an Overlooked Hotspot for American Ginseng (Panax quinquefolius) in Virginia

Peters, Jacob D.J.; Griscom, Heather P.

doi:10.3375/21-25

Cited by 2 publications

(1 citation statement)

References 41 publications

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“…True absence points were purposefully collected at least 30 m from the nearest red spruce presence points or in areas suitable for red spruce growth to increase model discrimination (Brown & Griscom 2022). True absences were only included in the SDM to increase discrimination within models so that current distribution would be more closely predicted rather than suitable habitat (Brown & Griscom 2022; Peters & Griscom 2022). Pseudo‐absence points, or randomly generated background points, were located throughout the state of Virginia in each model to avoid creating bias by only collecting absences in proximity to red spruce (Wisz & Guisan 2009).…”

Section: Methodsmentioning

confidence: 99%

Assessing red spruce (Picea rubensSarg.) restoration potential under current and future predicted climate change in Virginia

Brown,

Griscom

2023

Restoration Ecology

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Global climate change threatens many species across the planet. High‐elevation species, such as red spruce (Picea rubens), face significant and immediate threats from climate change. Red spruce has faced anthropogenic disturbances for over a century and is only recently beginning to recover across its range. Ecological niche modeling has become a common method of identifying the suitable habitat of a species, providing vital information to land managers carrying out restoration efforts. In this study, ecological niche models were used in a novel way, predicting distribution and habitat suitability separately and simultaneously to determine the spatial extent to which red spruce forests can be restored. In addition to models, surveys were conducted to elucidate the current regeneration trends of red spruce. Furthermore, climate projections were used to determine how restoration potential may change over the course of the twenty‐first century. Comparisons between distribution and habitat suitability models indicate that there is additional habitat available for red spruce expansion. Regeneration surveys show that there is positive regeneration both within and beyond red spruce canopies, validating model comparisons. Climate change projections indicate total elimination of suitable habitat in Virginia by 2100. However, these projections likely predict increased competition for red spruce from low elevation competitors as opposed to physiological limitations imposed by climate change. It is therefore prudent to protect established populations and encourage further regeneration within and beyond current red spruce stands in anticipation of future ecological shifts.

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Section: Methodsmentioning

confidence: 99%

Assessing red spruce (Picea rubensSarg.) restoration potential under current and future predicted climate change in Virginia

Brown,

Griscom

2023

Restoration Ecology

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Polarization-Independent Terahertz Surface Plasmon Resonance Biosensor for Species Identification of Panax and Paeonia

Sun

et al. 2023

Photonics

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In this paper, we proposed a polarization-independent terahertz surface plasmon resonance (SPR) biosensor based on an angular cyclic element structure. The biosensor has the advantages of high sensitivity detection and high stability against the polarization change of incident terahertz light. Based on the principle that the spatial longitudinal electric field of the SPR biosensor is nonlinear and sensitive to the dielectric constant of the sample, we theoretically proved that specific nonlinear response curves with certain saturating speed and amplitude can be formed to identify different samples. The biosensor was applied to identify Panax (notoginseng, ginseng and American ginseng, 48 samples each) and Paeonia (white peony and red peony, 48 samples each) with the accuracy of 95.8% and 94.4%, respectively. The standard deviations (SD) were less than 0.347% and 0.403%, respectively. Therefore, the polarization-independent terahertz biosensor can rapidly and accurately identify Panax species and Paeonia species. These results provide a new reference for rapid and low-cost identification of medicine species.

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Highlighting an Overlooked Hotspot for American Ginseng (Panax quinquefolius) in Virginia

Cited by 2 publications

References 41 publications

Assessing red spruce (Picea rubensSarg.) restoration potential under current and future predicted climate change in Virginia

Assessing red spruce (Picea rubensSarg.) restoration potential under current and future predicted climate change in Virginia

Polarization-Independent Terahertz Surface Plasmon Resonance Biosensor for Species Identification of Panax and Paeonia

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