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30 results for “black sand”
Con-mod species composition in the Black Sand experiment for East Knoll, Audubon, Lefty, Soddie and Trough, 2019 - ongoing.
In the alpine tundra, shrubs modify wind distribution of snow, increasing snowpack on the leeward side of shrubs, and they provide shading, which modifies temperatures. In order to mimic these abiotic effect of shrubs, structures called connectivity modifiers, hereafter referred to as con-mods, were deployed in Black Band experiment plots in September 2018. Briefly, the Black Sand experiment was initiated in May 2018 to measure the effects of an extended growing season, by initiating earlier snow melt through the application of black sand, on plants and biogeochemistry. Together, this experimental framework allows us to ask how biotic effects influence climate exposure and ecological responsiveness.
Con-mod soil temperature data in the Black Sand experiment control plots for East Knoll, Audubon, Lefty, Soddie and Trough, 2019 - ongoing.
In the alpine tundra, shrubs modify wind distribution of snow, increasing snowpack on the leeward side of shrubs, and they provide shading, which modifies temperatures. In order to mimic these abiotic effect of shrubs, structures called connectivity modifiers, hereafter referred to as con-mods, were deployed in Black Band experiment plots in September 2018. Briefly, the Black Sand experiment was initiated in May 2018 to measure the effects of an extended growing season, by initiating earlier snow melt through the application of black sand, on plants and biogeochemistry. Together, this experimental framework allows us to ask how biotic effects influence climate exposure and ecological responsiveness.
Black sand pilot experiment 2017
We piloted using black sand as a method for speeding snowmelt on Niwot Ridge in the summer of 2017. In order to understand the effects of earlier snowmelt and longer growing season, we conducted a manipulative experiment where in two sites (one below Tvan and one near the bottom of the Trough), two 8 x 15 m plots received black sand in May 2017. Measurements were taken throughout the summer for albedo, soil moisture, inorganic nitrogen, snow depth, incoming and reflected radiation and nitrogen in the manipulative plots and nearby controls.
Black Sand pilot experiment for speeding snowmelt on Niwot Ridge for summer 2015
We piloted using black sand as a method for speeding snowmelt on Niwot Ridge in the summer of 2015. At each of two sites (Trough and Tvan), two 2x2 m plots were set up and two 3x3m plots were set up, with one of each size plot receiving 600 g/m2 black sand and one receiving 800 g/m2 of black sand. The sand treatments sped snowmelt by 6-9 days. Initially, soil moisture appeared to be slightly lower in the sand plots and soil temperature appeared to be slightly higher, but these effects disappeared by July.
Federal sampler data for Black Sand experimental plots, 2018
This project is part of the Black Sand experiment to monitor effects of early snowmelt at Niwot Ridge. At each of five sites (Lefty, Soddie, Trough, East Knoll and Audubon) two 2x2 m plots were set up and two 3x3m plots were set up, with one of each size plot receiving 600 g/m2 black sand and one receiving 800 g/m2 of black sand. This portion of the black sand experiment was to look at snow depth and SWE using a federal sampler at each of the plots in 2018. We use an aluminum Standard Federal Snow Sampler to measure snow depth and snow water equivalent (SWE). This device, compared to traditional snow pit techniques, provides efficient measurement capabilities that are less disruptive to the snowpack. Manual Federal Sampler measurements provide high accuracy point data to determine the amount of water in the surrounding snowpack. With a high downstream reliance on water within the regional snowpack, our weekly measurements give a time series of SWE throughout the winter season, offering consistent and dependable information for water resource planning and preparation.
Data from: Survival by genotype: patterns at Mc1r are not black and white at the White Sands ecotone
Measuring links among genotype, phenotype and survival in the wild has long been a focus of studies of adaptation. We conducted a 4-year capture–recapture study to measure survival by genotype and phenotype in the Southwestern Fence Lizard (Sceloporus cowlesi) at the White Sands ecotone (transition area between white sands and dark soil habitats). We report several unanticipated findings. First, in contrast with previous work showing that cryptic blanched coloration in S. cowlesi from the heart of the dunes is associated with mutations in the melanocortin-1 receptor gene (Mc1r), ecotonal S. cowlesi showed minimal association between colour phenotype and Mc1r genotype. Second, the frequency of the derived Mc1r allele in ecotonal S. cowlesi appeared to decrease over time. Third, our capture–recapture data revealed a lower survival rate for S. cowlesi individuals with the derived Mc1r allele. Thus, our results suggest that selection at the ecotone may have favoured the wild-type allele in recent years. Even in a system where a genotype–phenotype association appeared to be black and white, our study suggests that additional factors – including phenotypic plasticity, epistasis, pleiotropy and gene flow – may play important roles at the White Sands ecotone. Our study highlights the importance of linking molecular, genomic and organismal approaches for understanding adaptation in the wild. Furthermore, our findings indicate that dynamics of natural selection can be particularly complex in transitional habitats like ecotones and emphasize the need for future research that examines the patterns of ongoing selection in other ecological 'grey' zones.
Colour illustrations. Flowers, fruits, leaves and seeds of Musa itinerans (background photo by D.T. Vu); from top to bottom and left to right: colony on PDA after 14 d at 24 °C in darkness (left = obverse,right = reverse), sporodochia formed on CLA, aerial conidiophore, aerial conidiogenous cells, aerial conidia, sporodochial conidia. Scale bars: black = 20 µm, white = 10 µm. in Fusarium chuoi R. Hill, Gaya, D.T. Vu, Sand.-Den. & Crous, R. Hill, Gaya, D.T. Vu, Sand.-Den. & Crous sp. nov.
Colour illustrations. Flowers, fruits, leaves and seeds of Musa itinerans (background photo by D.T. Vu); from top to bottom and left to right: colony on PDA after 14 d at 24 °C in darkness (left = obverse,right = reverse), sporodochia formed on CLA, aerial conidiophore, aerial conidiogenous cells, aerial conidia, sporodochial conidia. Scale bars: black = 20 µm, white = 10 µm.
On following pages: 3. Idaho Pocket Gopher (Thomomys idahoensis); 4. Wyoming Pocket Gopher (Thomomys clusius); 5. Northern Pocket Gopher (Thomomys talpoides); 6. Camas Pocket Gopher (Thomomys bulbivorus), 7. Townsend's Pocket Gopher (Thomomys townsend); 8. Southern Pocket Gopher (Thomomys umbrinus); 9. Sierra Madre Occidental Pocket Gopher (Thomomys sheldoni); 10. Black-and-Brown Pocket Gopher (Thomomys atrovarius), 11. Nayar Pocket Gopher (Thomomys nayarensis); 12. Botta's Pocket Gopher (Thomomys bottae); 13. Plains Pocket Gopher (Geomys bursarius); 14. Hall's Pocket Gopher (Geomys jugossicularis); 15. Sand Hills Pocket Gopher (Geomys lutescens); 16. Desert Pocket Gopher (Geomys arenarius); 17. Jones's Pocket Gopher (Geomys knoxjonesi); 18. Attwater''s Pocket Gopher (Geomys attwateri); 19. Texas Pocket Gopher (Geomys personatus); 20. Strecker's Pocket Gopher (Geomys streckeri); 21. Tropical Pocket Gopher (Geomys tropicalis); 22. Llano Pocket Gopher (Geomys texensis); 23. Baird's Pocket Gopher (Geomys breviceps); 24. South-eastern Pocket Gopher (Geomys pinetis). in Geomyidae
On following pages: 3. Idaho Pocket Gopher (Thomomys idahoensis); 4. Wyoming Pocket Gopher (Thomomys clusius); 5. Northern Pocket Gopher (Thomomys talpoides); 6. Camas Pocket Gopher (Thomomys bulbivorus), 7. Townsend's Pocket Gopher (Thomomys townsend); 8. Southern Pocket Gopher (Thomomys umbrinus); 9. Sierra Madre Occidental Pocket Gopher (Thomomys sheldoni); 10. Black-and-Brown Pocket Gopher (Thomomys atrovarius), 11. Nayar Pocket Gopher (Thomomys nayarensis); 12. Botta's Pocket Gopher (Thomomys bottae); 13. Plains Pocket Gopher (Geomys bursarius); 14. Hall's Pocket Gopher (Geomys jugossicularis); 15. Sand Hills Pocket Gopher (Geomys lutescens); 16. Desert Pocket Gopher (Geomys arenarius); 17. Jones's Pocket Gopher (Geomys knoxjonesi); 18. Attwater''s Pocket Gopher (Geomys attwateri); 19. Texas Pocket Gopher (Geomys personatus); 20. Strecker's Pocket Gopher (Geomys streckeri); 21. Tropical Pocket Gopher (Geomys tropicalis); 22. Llano Pocket Gopher (Geomys texensis); 23. Baird's Pocket Gopher (Geomys breviceps); 24. South-eastern Pocket Gopher (Geomys pinetis).
Data from: Survival by genotype: patterns at Mc1r are not black and white at the White Sands ecotone
Open the record for dataset details and reuse information.
Supplementary material 1 from: Prodanov B, Dimitrov L, Kotsev I, Bekova R, Lambev T (2023) Spatial distribution of sand dunes along the Bulgarian Black Sea coast: inventory, UAS mapping and new discoveries. Nature Conservation 54: 81-120. https://doi.org/10.3897/natureconservation.54.105507
List of identified beach-dune systems along the Bulgarian Black Sea coast
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International Brain Laboratory public data
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OpenNeuro
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