28 results on '"Weathers K"'
Search Results
2. Nitrogen cycling in tropical Atlantic Forest differing in exposure to urban atmospheric nitrogen deposition
- Author
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Ponette-González, A. G., Perroni, Y., Weathers, K. C., de Souza, P. A., García-Oliva, F., and de Mello, W. Z.
- Published
- 2017
3. The Next Decade of Big Data in Ecosystem Science
- Author
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LaDeau, S. L., Han, B. A., Rosi-Marshall, E. J., and Weathers, K. C.
- Published
- 2017
4. Variation in NO 3 Export from Flowing Waters of Vastly Different Sizes: Does One Model Fit All?
- Author
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Caraco, N. F., Cole, J. J., Likens, G. E., Lovett, G. M., and Weathers, K. C.
- Published
- 2003
5. The Effect of Landscape Features on Deposition to Hunter Mountain, Catskill Mountains, New York
- Author
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Weathers, K. C., Lovett, G. M., Likens, G. E., and Lathrop, R.
- Published
- 2000
- Full Text
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6. Frontiers in Ecosystem Ecology from a Community Perspective : The Future is Boundless and Bright
- Author
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Weathers, K. C., Groffman, P. M., Van Dolah, E., Bernhardt, E., Grimm, N. B., McMahon, K., Schimel, J., Paolisso, M., Maranger, R., Baer, S., Brauman, K., and Hinckley, E.
- Published
- 2016
7. Assessing the influence of topography and canopy structure on Douglas fir throughfall with LiDAR and empirical data in the Santa Cruz mountains, USA
- Author
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Griffith, K. T., Ponette-González, A. G., Curran, L. M., and Weathers, K. C.
- Published
- 2015
- Full Text
- View/download PDF
8. Do Nutrient Limitation Patterns Shift from Nitrogen Toward Phosphorus with Increasing Nitrogen Deposition Across the Northeastern United States?
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Crowley, K. F., McNeil, B. E., Lovett, G. M., Canham, C. D., Driscoll, C. T., Rustad, L. E., Denny, E., Hallett, R. A., Arthur, M. A., Boggs, J. L., Goodale, C. L., Kahl, J. S., McNulty, S. G., Ollinger, S. V., Pardo, L. H., Schaberg, P. G., Stoddard, J. L., Weand, M. P., and Weathers, K. C.
- Published
- 2012
9. Tropical land-cover change alters biogeochemical inputs to ecosystems in a Mexican montane landscape
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Ponette-González, A. G., Weathers, K. C., and Curran, L. M.
- Published
- 2010
10. lakeCoSTR: A tool to facilitate use of Landsat Collection 2 to estimate lake surface water temperatures.
- Author
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Herrick, C., Steele, B. G., Brentrup, J. A., Cottingham, K. L., Ducey, M. J., Lutz, D. A., Palace, M. W., Thompson, M. C., Trout‐Haney, J. V., and Weathers, K. C.
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LANDSAT satellites ,WATER temperature ,REMOTE sensing ,LAKES ,SURFACE temperature ,SURFACE area ,SUBGLACIAL lakes - Abstract
Although remote sensing of lake surface water temperature has been ongoing for decades and has led to important discoveries regarding the warming of lake surface temperature in some regions, the ability to access and use remote sensing data is still primarily limited to remote sensing experts. Effective use of remote sensing data involves technical skills in coding (often in multiple programming languages), application of appropriate atmospheric corrections, and integrating spatially heterogeneous remote sensing data with in situ data obtained at specific geographic locations. To improve access to remote sensing data and broaden the understanding of changes in lake surface water temperature over the past four decades, we created lakeCoSTR (lake Collection 2 Surface Temperature Retrieval), a user‐friendly, cloud‐based script that gives ecologists lacking specialized training in remote sensing the ability to access the Landsat Collection 2 temperature estimates for lakes with a surface area of at least 0.4 ha. Additionally, if in situ data are provided, a paired dataset can be created within the tool. To demonstrate lakeCoSTR, we retrieved surface water temperature data for a lake with a long monitoring history, Lake Sunapee, NH, USA, and compared long‐term surface temperature trends between data obtained via lakeCoSTR and in situ measurements. When compared with Landsat Collection 1 temperature estimates derived from a single‐channel algorithm, the Landsat Collection 2 data from lakeCoSTR required no calibration to in situ data. This suggests that lakeCoSTR can be used to document temporal trends in lakes and to reprocess analyses that relied on Collection 1 data. From 1983 until 2020, remotely sensed surface water temperature estimates at Lake Sunapee increased by 0.07–0.09°C year−1 during July and August, a trend that agreed with long‐term in situ record. As climate change continues to impact freshwater systems, a better understanding of long‐term temperature data will be vital. Remotely sensed data, like those acquired using lakeCoSTR, may provide a window into temperature trends for lakes. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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- View/download PDF
11. Variation in NO3 Export from Flowing Waters of Vastly Different Sizes: Does One Model Fit All?
- Author
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Caraco, N. F., Cole, J. J., Likens, G. E., Lovett, G. M., and Weathers, K. C.
- Published
- 2003
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12. EFFECTS OF A LOW INTENSITY WEIGHT TRAINING PROGRAM ON MUSCULAR STRENGTH AND FUNCTIONAL ABILITY IN THE HEALTHY ELDERLY
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Weathers, K R., Swank, A M., Durham, M P., Bradley, S, Adams, K J., and Kipp, R L.
- Published
- 2001
13. Wet Dust Deposition Across Texas During the 2012 Drought: An Overlooked Pathway for Elemental Flux to Ecosystems.
- Author
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Ponette‐González, A. G., Collins, J. D., Manuel, J. E., Byers, T. A., Glass, G. A., Weathers, K. C., and Gill, T. E.
- Abstract
Abstract: Airborne dust can alter ecosystem productivity and biogeochemical cycling by enhancing atmospheric nutrient and pollutant deposition. Wet dust deposition (dust‐in‐rain) is less frequently quantified than dry deposition but represents a potentially significant flux to ecosystems. We quantified dust‐in‐rain event frequency, dust influence on rainwater ionic and elemental composition, and wet dissolved and particulate deposition during weeks affected by dust‐in‐rain and all other weeks (background samples) at two sites across Texas (one arid, Guadalupe Mountains, and one humid, Gulf coastal prairie) during the centennial‐scale 2012 drought. Although dust‐in‐rain was sporadic, a clear dust signature was evident in rainwater. Compared to background samples, crustal species (Fe and Mn) were more prevalent than anthropogenic species (Cu and Zn) in dust‐in‐rain. Volume‐weighted mean rainwater concentrations of K
+ , Na+ , and Cl− and of all particulate elements were also significantly greater in dust‐in‐rain than in background samples. In the Guadalupe Mountains, West Texas, dust‐in‐rain contributed nearly 50% of annual wet dissolved Na+ and Cl− and 22–35% of dissolved Ca2+ , Mg2+ , K+ , and PO4 3− deposition. In the Gulf coastal prairie, East Texas, dust‐in‐rain delivered 19%, 13%, and 9% of annual wet dissolved PO4 3− , Ca2+ , and K+ deposition, respectively. A major proportion of annual wet particulate deposition (>56% in Guadalupe Mountains and ~30% in Gulf coastal prairie) similarly occurred with dust‐in‐rain. Our findings show that infrequent dust‐in‐rain events constitute an important but overlooked pathway for elemental flux to ecosystems in arid source and humid receptor sites during severe drought. Quantifying these fluxes is crucial to determine dust impacts on ecosystem processes. [ABSTRACT FROM AUTHOR]- Published
- 2018
- Full Text
- View/download PDF
14. Building the team for team science.
- Author
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Read, E. K., O'Rourke, M., Hong, G. S., Hanson, P. C., Winslow, L. A., Crowley, S., Brewer, C. A., Weathers, K. C., and Peters, D. P. C.
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TEAM building ,INFORMATION sharing ,SCIENTISTS ,TRAINING ,TEAMS in the workplace - Abstract
The ability to effectively exchange information and develop trusting, collaborative relationships across disciplinary boundaries is essential for 21st century scientists charged with solving complex and large‐scale societal and environmental challenges, yet these communication skills are rarely taught. Here, we describe an adaptable training program designed to increase the capacity of scientists to engage in information exchange and relationship development in team science settings. A pilot of the program, developed by a leader in ecological network science, the Global Lake Ecological Observatory Network (GLEON), indicates that the training program resulted in improvement in early career scientists’ confidence in team‐based network science collaborations within and outside of the program. Fellows in the program navigated human‐network challenges, expanded communication skills, and improved their ability to build professional relationships, all in the context of producing collaborative scientific outcomes. Here, we describe the rationale for key communication training elements and provide evidence that such training is effective in building essential team science skills. [ABSTRACT FROM AUTHOR]
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- 2016
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15. Effects of Acidic Deposition and Soil Acidification on Sugar Maple Trees in the Adirondack Mountains, New York.
- Author
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Sullivan, T. J., Lawrence, G. B., Bailey, S. W., McDonnell, T. C., Beier, C. M., Weathers, K. C., McPherson, G. T., and Bishop, D. A.
- Published
- 2013
- Full Text
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16. Coupling of fog and marine microbial content in the near-shore coastal environment.
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Dueker, M. E., Weathers, K. C., Juhl, A. R., Uriarte, M., and O'Mullan, G. D.
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MARINE microbiology ,COASTAL biodiversity ,BIOGEOCHEMISTRY ,AEROSOLS ,OCEANOGRAPHY - Abstract
Microbes in the atmosphere (microbial aerosols) play an important role in climate and provide an ecological and biogeochemical connection between oceanic, atmospheric, and terrestrial environments. However, the sources and environmental factors controlling the concentration, diversity, transport, and viability of microbial aerosols are poorly understood. This study examined culturable microbial aerosols from a coastal environment in Maine (USA) and determined the effect of onshore wind speed and fog presence on deposition rate, source, and community composition. During fog events with low onshore winds (<2ms
-1 ) the near-shore deposition of microbial aerosols (microbial fallout) decreased with increasing wind speeds, whereas microbial fallout rates under clear conditions and comparable low wind speeds showed no wind speed dependence. Mean aerosol particle size also increased with onshore wind speed when fog was present, indicating increased shoreward transport of larger aerosol particles. 16S rRNA sequencing of culturable ocean surface bacteria and microbial aerosols deposited onshore resulted in the detection of 31 bacterial genera, with 5 dominant genera (Vibrio, Bacillus, Pseudoalteromonas, Psychrobacter, Salinibacterium) making up 66% of all sequences. The sequence library from microbial aerosol isolates, as with libraries found in other coastal/marine aerosol studies, was dominated at the phylum level by Proteobacteria, with additional representation from Firmicutes, Actinobacteria and Bacteroidetes. Seventy-five percent of the culturable microbial aerosols falling out under foggy conditions were most similar to GenBank-published sequences detected in marine environments. Using a 97% similarity cut-off, sequence libraries from ocean surface and fog isolates shared eight operational taxonomic units (OTU's) in total, three of which were the most dominant OTU's in the library, representing large fractions of the ocean (28 %) and fog (21 %) libraries. The fog and ocean surface libraries were significantly more similar in microbial community composition than clear (non-foggy) and ocean surface libraries, according to both Jaccard and Sorenson indices. These findings provide the first evidence of a difference in community composition and microbial culturability of aerosols associated with fog compared to clear conditions. The data support a dual role for fog in enhancing the fallout of viable microbial aerosols via increased gravitational settling rates and decreased aerosolization stress on the organisms, which may include relief from UV inactivation, desiccation, and oligotrophic microconditions. This study provides a strong case for ocean to terrestrial transport of microbes and a potential connection between water quality and air quality at coastal sites. [ABSTRACT FROM AUTHOR]- Published
- 2012
- Full Text
- View/download PDF
17. Coupling of fog and marine microbial content in the near-shore coastal environment.
- Author
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Dueker, M. E., O'Mullan, G. D., Weathers, K. C., Juhl, A. R., and Uriarte, M.
- Subjects
MARINE microbiology ,ATMOSPHERIC aerosols ,BIOGEOCHEMISTRY ,COASTAL biodiversity ,PARTICLE size determination ,AIR quality ,WATER quality - Abstract
Microbes in the atmosphere (microbial aerosols) play an important role in climate and provide an ecological and biogeochemical connection between oceanic, atmospheric, and terrestrial environments. However, the sources and environmental factors controlling the concentration, diversity, transport, and viability of microbial aerosols are poorly understood. This study examined culturable microbial aerosols from a coastal environment in Maine (USA) and determined the effect of onshore wind speed and fog presence on deposition rate, source, and community composition. During fog events with low onshore winds (< 2 m s
-1 ) the near-shore deposition of microbial aerosols (microbial fallout) decreased with increasing wind speeds, whereas microbial fallout rates under clear conditions and comparable low wind speeds showed no wind speed dependence. Mean aerosol particle size also increased with onshore wind speed when fog was present, indicating increased shoreward transport of larger aerosol particles. 16S rRNA sequencing of culturable ocean surface bacteria and microbial aerosols deposited onshore resulted in the detection of 31 bacterial genera, with 5 dominant genera (Vibrio, Bacillus, Pseudoalteromonas, Psychrobacter, Salinibacterium) making up 66% of all sequences. The microbial aerosol sequence library, as with libraries found in other coastal/marine aerosol studies, was dominated at the phylum level by Proteobacteria, with additional representation from Firmicutes, Actinobacteria and Bacteroidetes. Seventy-five percent of the viable microbial aerosols falling out under foggy conditions were most similar to GenBank-published sequences detected in marine environments. Using a 97% similarity cut-off, ocean surface and fog sequence libraries shared eight operational taxonomic units (OTU's) in total, three of which were the most dominant OTU's in the library, representing large fractions of the ocean (28%) and fog (21%) libraries. The fog and ocean surface libraries were significantly more similar in microbial community composition than clear (non-foggy) and ocean surface libraries, according to both Jaccard and Sorenson indices. These findings provide the first evidence of a difference in community composition and microbial viability (culturability) of aerosols associated with fog compared to clear conditions. The data support a dual role for fog in enhancing the fallout of viable (culturable) microbial aerosols via increased gravitational settling rates and decreased aerosolization stress on the organisms, which may include relief from UV inactivation, desiccation, and oligotrophic microconditions. This study provides a strong case for ocean to terrestrial transport of microbes and a potential connection between water quality and air quality at coastal sites. [ABSTRACT FROM AUTHOR]- Published
- 2011
- Full Text
- View/download PDF
18. An automated method to monitor lake ice phenology.
- Author
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Pierson, D.C., Weyhenmeyer, G. A., Arvola, L., Benson, B., Blenckner, T., Kratz, T., Livingstone, D.M., Markensten, H., Marzec, G., Pettersson, K., and Weathers, K.
- Published
- 2011
- Full Text
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19. The Influence of Tree Species, Nitrogen Fertilization, and Soil C to N ratio on Gross Soil Nitrogen Transformations.
- Author
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Christenson, L. M., Lovett, G. M., and Weathers, K. C
- Subjects
NITROGEN in soils ,NITROGEN fertilizers ,FOREST soils ,BIOMINERALIZATION - Abstract
To investigate controls on gross N transformations in forest soils, a
15 N pool dilution technique was used on soils of single-species plots of five major tree species (red oak [Quercus rubra L.], sugar maple[Acersaccharum Marsh.], hemlock [Tsuga canadensis (L.) Cart], beech [Fagus grandifolia Ehrh.] and yellow birch [Betula alleghaniensis Britton]) in the Catskill Mountains of New York State. Catskill forest soils had high rates of gross mineralization and NH4 + consumption, indicating rapid NH4 + cycling, a pattern not captured by net h mineralization assays. Sugar maple had the highest rates of gross mineralization and NH4 + consumption. Rates of gross nitrification were similar to rates of net nitrification for all species. Sugar maple had the highest gross nitrification rates, while hemlock and red oak had the lowest rates. There were no significant species differences in NO3 - consumption Fertilization of the plots did not significantly alter N cycling rates with the exception of yellow birch, where N fertilization decreased NO3 - consumption. We observed a significant negative relationship between net nitrification and soil C/N ratio in both organic and minera horizons, but our results indicate that the mechanism underlying that relationship was different in the two horizons. In the mineral horizon, limitation of net nitrification in soils of high C/N ratio probably resulted from low gross NH4 + production. In organic horizons, low NH4 + production was not a significant factor and higher NO3 - consumprion explained some of the pattern. Understanding the roles individual tree species as well as excess N input play in regulation of the N cycle will improve forest management and prediction of forest responses to elevated N deposition. [ABSTRACT FROM AUTHOR]- Published
- 2009
- Full Text
- View/download PDF
20. Variation in NO3 Export from Flowing Waters of Vastly Different Sizes: Does One Model Fit All?
- Author
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Caraco, N. F., Cole, J. J., Likens, G. E., Lovett, G. M., and Weathers, K. C.
- Subjects
NITROGEN in water ,RIVERS ,WATERSHEDS ,BIOGEOCHEMISTRY ,BIOTIC communities - Abstract
Flowing waters receive nitrogen (N) from the surrounding watershed and ultimately export much of this N to coastal waters, which in turn can be substantially affected by these inputs. Although the control of N export is complex, for large rivers among-system variation is predicted relatively well by simple models of human activity. Using data from 249 predominantly North Temperate watersheds that varied in size from 0.1 to over 1,000,000 km
2 we examined whether these simple models lose their predictive power at smaller scales. We found that the relationship between human population density and NO3 export becomes weaker at smaller scales, and that for watersheds less than 100 km2 , it explains only 8% of the 1000-fold variation in NO3 export. However, NO3 export predicted from a simple loading model related well to measured NO3 export across all scales, linear regressions of log modeled versus log measured export for small (less than 100 km2 ), mid-sized (100–10,000 km2 ), and large (more than 10,000 km2 ) watersheds were all highly significant (P < 0.01) and had r2 values of 0.78, 0.63, and 0.77, respectively. For the smallest systems, however, the model was biased and predicted higher NO3 export than was measured. The bias suggests slightly greater storage or gaseous N loss in smaller watersheds, whereas the light correlation between predicted and measured export indicates that for small as well as large systems, among-system variation in NO3 export is controlled primarily by anthropogenic N loads rather than site-specific variations in soil or vegetation characteristics. Across all scales, however, predictive models can be improved by the inclusion of these local parameters. [ABSTRACT FROM AUTHOR]- Published
- 2003
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- View/download PDF
21. Two new ground-level cloud water sampler designs which reduce rain contamination
- Author
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Kimball, K. D., Weathers, K. C., Daube, Jr., B., and Lamar, P. A.
- Published
- 1987
22. Longitudinal trends in pH and aluminum chemistry of the Coxing Kill,Ulster County, New York
- Author
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Begemann, M. H., Schmidt, D. A., Schultz, A. M., and Weathers, K. C.
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WATER pollution measurement - Published
- 1993
23. Global data set of long-term summertime vertical temperature profiles in 153 lakes
- Author
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Jasmine E. Saros, Gesa A. Weyhenmeyer, Scott N. Higgins, Rolf D. Vinebrooke, Pierre Denis Plisnier, Orlane Anneville, Stephanie J. Melles, Jen Klug, Jason Tallant, Noah R. Lottig, Denis Y. Rogozin, Wim Thiery, Josef Wanzenböck, Jouko Sarvala, Peter B. McIntyre, David P. Hamilton, Harald Hetzenauer, Peter D. F. Isles, Johanna Korhonen, Fabio Lepori, Rita Adrian, Michela Rogora, Martin S. Luger, Donald C. Pierson, Margaret Dix, Koji Tominaga, Peter R. Leavitt, Chris G. McBride, Svetlana V. Shimaraeva, David C. Richardson, Stephen C. Maberly, Barbara Leoni, Esteban Balseiro, Émilie Saulnier-Talbot, Karl E. Havens, Ruben Sommaruga, Timo Huttula, Maxim A. Timofeyev, Steve Sadro, Lesley B. Knoll, Heidrun Feuchtmayr, Nikolai M. Korovchinsky, Evelyn E. Gaiser, T. V. Zhukova, James A. Rusak, Craig E. Williamson, Dag O. Hessen, Wendel Keller, Hannu Huuskonen, Martin T. Dokulil, Ekaterina V. Lepskaya, Syuhei Ban, Lewis Sitoki, K. David Hambright, Beatriz Modenutti, Shawn P. Devlin, Dietmar Straile, Eugene A. Silow, Andrew M. Paterson, Laura Pacholski, Sally Macintyre, Hilary M. Swain, Dörthe C. Müller-Navarra, Alexander P. Tolomeev, Helen V. Pislegina, Oliver Köster, Sudeep Chandra, Piet Verburg, Nico Salmaso, Rachel M. Pilla, Elizabeth M. Mette, Klaus Joehnk, Michael J. Vanni, María J. González, Daniel E. Schindler, Natalie A. Feldsine, Natalie K. Fogarty, Egor S. Zadereev, William Colom-Montero, Alon Rimmer, Kristin E. Strock, Scott F. Girdner, Benjamin M. Kraemer, B. V. Adamovich, Kathleen C. Weathers, Olga O. Rusanovskaya, Pilla, R, Mette, E, Williamson, C, Adamovich, B, Adrian, R, Anneville, O, Balseiro, E, Ban, S, Chandra, S, Colom-Montero, W, Devlin, S, Dix, M, Dokulil, M, Feldsine, N, Feuchtmayr, H, Fogarty, N, Gaiser, E, Girdner, S, Gonzalez, M, Hambright, K, Hamilton, D, Havens, K, Hessen, D, Hetzenauer, H, Higgins, S, Huttula, T, Huuskonen, H, Isles, P, Joehnk, K, Keller, W, Klug, J, Knoll, L, Korhonen, J, Korovchinsky, N, Koster, O, Kraemer, B, Leavitt, P, Leoni, B, Lepori, F, Lepskaya, E, Lottig, N, Luger, M, Maberly, S, Macintyre, S, Mcbride, C, Mcintyre, P, Melles, S, Modenutti, B, Muller-Navarra, D, Pacholski, L, Paterson, A, Pierson, D, Pislegina, H, Plisnier, P, Richardson, D, Rimmer, A, Rogora, M, Rogozin, D, Rusak, J, Rusanovskaya, O, Sadro, S, Salmaso, N, Saros, J, Sarvala, J, Saulnier-Talbot, E, Schindler, D, Shimaraeva, S, Silow, E, Sitoki, L, Sommaruga, R, Straile, D, Strock, K, Swain, H, Tallant, J, Thiery, W, Timofeyev, M, Tolomeev, A, Tominaga, K, Vanni, M, Verburg, P, Vinebrooke, R, Wanzenbock, J, Weathers, K, Weyhenmeyer, G, Zadereev, E, Zhukova, T, and Hydrology and Hydraulic Engineering
- Subjects
0106 biological sciences ,Data Descriptor ,010504 meteorology & atmospheric sciences ,lämpötilajakautuma ,Limnology ,Magnitude (mathematics) ,Oceanografi, hydrologi och vattenresurser ,Atmospheric sciences ,01 natural sciences ,Oceanography, Hydrology and Water Resources ,happikato ,Subarctic climate ,ekologia ,Computer Science Applications ,kesä ,Freshwater ecology ,BIO/07 - ECOLOGIA ,veden lämpeneminen ,lämpötila ,lämpeneminen ,Statistics, Probability and Uncertainty ,Information Systems ,Statistics and Probability ,Science ,veden lämpötila ,Climate change ,Library and Information Sciences ,järvet ,Ecology and Environment ,Education ,limnologia ,ecological data ,ddc:570 ,Settore BIO/07 - ECOLOGIA ,pystysuora sekoittuminen ,otantamenetelmät ,14. Life underwater ,0105 earth and related environmental sciences ,010604 marine biology & hydrobiology ,15. Life on land ,Term (time) ,Data set ,13. Climate action ,Environmental science ,subarktinen vyöhyke ,Water quality ,lämpötilan pystyjakauma ,Surface water - Abstract
Climate change and other anthropogenic stressors have led to long-term changes in the thermal structure, including surface temperatures, deepwater temperatures, and vertical thermal gradients, in many lakes around the world. Though many studies highlight warming of surface water temperatures in lakes worldwide, less is known about long-term trends in full vertical thermal structure and deepwater temperatures, which have been changing less consistently in both direction and magnitude. Here, we present a globally-expansive data set of summertime in-situ vertical temperature profiles from 153 lakes, with one time series beginning as early as 1894. We also compiled lake geographic, morphometric, and water quality variables that can influence vertical thermal structure through a variety of potential mechanisms in these lakes. These long-term time series of vertical temperature profiles and corresponding lake characteristics serve as valuable data to help understand changes and drivers of lake thermal structure in a time of rapid global and ecological change., Measurement(s) temperature of water • temperature profile Technology Type(s) digital curation Factor Type(s) lake location • temporal interval Sample Characteristic - Environment lake • reservoir Sample Characteristic - Location global Machine-accessible metadata file describing the reported data: 10.6084/m9.figshare.14619009
- Published
- 2021
- Full Text
- View/download PDF
24. Widespread deoxygenation of temperate lakes
- Author
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Donald C. Pierson, Chris G. McBride, Benjamin M. Kraemer, Steven Sadro, Michela Rogora, Julita Dunalska, Laura Diemer, Kathleen C. Weathers, Jean-Philippe Jenny, Wim Thiery, Andrew M. Paterson, Dörthe C. Müller-Navarra, Martin Schmid, Gretchen J. A. Hansen, Émilie Saulnier-Talbot, Rebecca L. North, Rachel M. Pilla, Joshua L. Mincer, Lauri Arvola, Ruben Sommaruga, John R. Jones, Gesa A. Weyhenmeyer, Kevin C. Rose, Josef Hejzlar, Barbara Leoni, Jonathan T. Stetler, James A. Rusak, O. Erina, Lesley B. Knoll, Lorraine L. Janus, Curtis L. DeGasperi, Craig E. Williamson, Sudeep Chandra, Peter R. Leavitt, Eleanor B. Mackay, Piet Verburg, K. David Hambright, Kiyoko Yokota, Stephen F. Jane, Giovanna Flaim, Hans-Peter Grossart, Catherine L. Hein, R. Iestyn Woolway, Shin-ichiro S. Matsuzaki, Jane, S, Hansen, G, Kraemer, B, Leavitt, P, Mincer, J, North, R, Pilla, R, Stetler, J, Williamson, C, Woolway, R, Arvola, L, Chandra, S, Degasperi, C, Diemer, L, Dunalska, J, Erina, O, Flaim, G, Grossart, H, Hambright, K, Hein, C, Hejzlar, J, Janus, L, Jenny, J, Jones, J, Knoll, L, Leoni, B, Mackay, E, Matsuzaki, S, Mcbride, C, Muller-Navarra, D, Paterson, A, Pierson, D, Rogora, M, Rusak, J, Sadro, S, Saulnier-Talbot, E, Schmid, M, Sommaruga, R, Thiery, W, Verburg, P, Weathers, K, Weyhenmeyer, G, Yokota, K, Rose, K, Hydrology and Hydraulic Engineering, Centre Alpin de Recherche sur les Réseaux Trophiques et Ecosystèmes Limniques (CARRTEL), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), and National Science Foundation (NSF)11373271702991163870417542651761805US Fulbright Student grantGerman Research Foundation (DFG)AD 91/22-1Natural Sciences and Engineering Research Council of Canada (NSERC)Canada Research ChairsProvince of SaskatchewanQueen's University BelfastMissouri Department of Natural ResourcesMissouri Agricultural Experiment StationNational Science Foundation (NSF)17542761950170Miami University Eminent Scholar FundEuropean Commission791812University of NevadaUC DavisUniversity of Warmia and Mazury in OlsztynRussian Science Foundation (RSF)19-77-30004Oklahoma Department of Wildlife ConservationOklahoma Water Resources BoardUnited States Department of DefenseCity of TulsaERDF/ESF project Biomanipulation as a tool for improving water quality of dam reservoirsCZ.02.1.01/0.0/0.0/16_025/0007417FA-UNIMIBUK Research & Innovation (UKRI)Natural Environment Research Council (NERC)International Commission for the Protection of Italian-Swiss Waters (CIPAIS)LTSER platform Tyrolean Alps (LTER-Austria)Belgian Federal Science Policy OfficeCD/AR/02AClark Foundation
- Subjects
Time Factors ,010504 meteorology & atmospheric sciences ,Time Factor ,Oceans and Seas ,Limnology ,Climate Change ,Oceans and Sea ,010501 environmental sciences ,01 natural sciences ,Lake ,Nutrient ,Settore BIO/07 - ECOLOGIA ,Phytoplankton ,Animals ,14. Life underwater ,Ecosystem ,0105 earth and related environmental sciences ,Multidisciplinary ,Animal ,Aquatic ecosystem ,Lake ecosystem ,Temperature ,Hypoxia (environmental) ,15. Life on land ,6. Clean water ,Oxygen ,Lakes ,Solubility ,13. Climate action ,Environmental chemistry ,Environmental science ,BIO/07 - ECOLOGIA ,[SDE.BE]Environmental Sciences/Biodiversity and Ecology ,Hypolimnion ,Surface water - Abstract
The concentration of dissolved oxygen in aquatic systems helps to regulate biodiversity1,2, nutrient biogeochemistry3, greenhouse gas emissions4, and the quality of drinking water5. The long-term declines in dissolved oxygen concentrations in coastal and ocean waters have been linked to climate warming and human activity6,7, but little is known about the changes in dissolved oxygen concentrations in lakes. Although the solubility of dissolved oxygen decreases with increasing water temperatures, long-term lake trajectories are difficult to predict. Oxygen losses in warming lakes may be amplified by enhanced decomposition and stronger thermal stratification8,9 or oxygen may increase as a result of enhanced primary production10. Here we analyse a combined total of 45,148 dissolved oxygen and temperature profiles and calculate trends for 393 temperate lakes that span 1941 to 2017. We find that a decline in dissolved oxygen is widespread in surface and deep-water habitats. The decline in surface waters is primarily associated with reduced solubility under warmer water temperatures, although dissolved oxygen in surface waters increased in a subset of highly productive warming lakes, probably owing to increasing production of phytoplankton. By contrast, the decline in deep waters is associated with stronger thermal stratification and loss of water clarity, but not with changes in gas solubility. Our results suggest that climate change and declining water clarity have altered the physical and chemical environment of lakes. Declines in dissolved oxygen in freshwater are 2.75 to 9.3 times greater than observed in the world’s oceans6,7 and could threaten essential lake ecosystem services2,3,5,11., The concentration of dissolved oxygen in aquatic systems helps to regulate biodiversity, nutrient biogeochemistry, greenhouse gas emissions, and the quality of drinking water. The long-term declines in dissolved oxygen concentrations in coastal and ocean waters have been linked to climate warming and human activity, but little is known about the changes in dissolved oxygen concentrations in lakes. Although the solubility of dissolved oxygen decreases with increasing water temperatures, long-term lake trajectories are difficult to predict. Oxygen losses in warming lakes may be amplified by enhanced decomposition and stronger thermal stratification8,9 or oxygen may increase as a result of enhanced primary production10. Here we analyse a combined total of 45,148 dissolved oxygen and temperature profiles and calculate trends for 393 temperate lakes that span 1941 to 2017. We find that a decline in dissolved oxygen is widespread in surface and deep-water habitats. The decline in surface waters is primarily associated with reduced solubility under warmer water temperatures, although dissolved oxygen in surface waters increased in a subset of highly productive warming lakes, probably owing to increasing production of phytoplankton. By contrast, the decline in deep waters is associated with stronger thermal stratification and loss of water clarity, but not with changes in gas solubility. Our results suggest that climate change and declining water clarity have altered the physical and chemical environment of lakes. Declines in dissolved oxygen in freshwater are 2.75 to 9.3 times greater than observed in the world’s oceans and could threaten essential lake ecosystem services.
- Published
- 2021
25. The effect of four landscape features on atmospheric deposition to Hunter Mountain, New York
- Author
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Weathers, K
- Published
- 1993
26. Global data set of long-term summertime vertical temperature profiles in 153 lakes.
- Author
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Pilla RM, Mette EM, Williamson CE, Adamovich BV, Adrian R, Anneville O, Balseiro E, Ban S, Chandra S, Colom-Montero W, Devlin SP, Dix MA, Dokulil MT, Feldsine NA, Feuchtmayr H, Fogarty NK, Gaiser EE, Girdner SF, González MJ, Hambright KD, Hamilton DP, Havens K, Hessen DO, Hetzenauer H, Higgins SN, Huttula TH, Huuskonen H, Isles PDF, Joehnk KD, Keller WB, Klug J, Knoll LB, Korhonen J, Korovchinsky NM, Köster O, Kraemer BM, Leavitt PR, Leoni B, Lepori F, Lepskaya EV, Lottig NR, Luger MS, Maberly SC, MacIntyre S, McBride C, McIntyre P, Melles SJ, Modenutti B, Müller-Navarra DC, Pacholski L, Paterson AM, Pierson DC, Pislegina HV, Plisnier PD, Richardson DC, Rimmer A, Rogora M, Rogozin DY, Rusak JA, Rusanovskaya OO, Sadro S, Salmaso N, Saros JE, Sarvala J, Saulnier-Talbot É, Schindler DE, Shimaraeva SV, Silow EA, Sitoki LM, Sommaruga R, Straile D, Strock KE, Swain H, Tallant JM, Thiery W, Timofeyev MA, Tolomeev AP, Tominaga K, Vanni MJ, Verburg P, Vinebrooke RD, Wanzenböck J, Weathers K, Weyhenmeyer GA, Zadereev ES, and Zhukova TV
- Abstract
Climate change and other anthropogenic stressors have led to long-term changes in the thermal structure, including surface temperatures, deepwater temperatures, and vertical thermal gradients, in many lakes around the world. Though many studies highlight warming of surface water temperatures in lakes worldwide, less is known about long-term trends in full vertical thermal structure and deepwater temperatures, which have been changing less consistently in both direction and magnitude. Here, we present a globally-expansive data set of summertime in-situ vertical temperature profiles from 153 lakes, with one time series beginning as early as 1894. We also compiled lake geographic, morphometric, and water quality variables that can influence vertical thermal structure through a variety of potential mechanisms in these lakes. These long-term time series of vertical temperature profiles and corresponding lake characteristics serve as valuable data to help understand changes and drivers of lake thermal structure in a time of rapid global and ecological change., (© 2021. The Author(s).)
- Published
- 2021
- Full Text
- View/download PDF
27. Isolation, identification, and time course of human DNA typing from bed bugs, Cimex lectularius.
- Author
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Schal C, Czado N, Gamble R, Barrett A, Weathers K, and Lodhi KM
- Subjects
- Animals, DNA blood, Entomology, Female, Forensic Genetics, Genotype, Humans, Male, Microsatellite Repeats, Polymerase Chain Reaction, Bedbugs, DNA isolation & purification, DNA Fingerprinting, Feeding Behavior
- Abstract
Bed bugs (Cimex lectularius L.) are ectoparasitic wingless insects that feed on the blood of mammals, typically in residential settings. The objectives of this study were to establish a time-course of human DNA quantitation from bed bugs and to generate human DNA profile(s) of a host and/or multiple hosts from a bed bug that fed on human blood. Female human genomic DNA concentrations ranged from 18.370 to 0.195ng/bed bug at 0-108h post blood meal (PBM), male human genomic DNA concentrations ranged from 5.4 to 0.105ng/bed bug at 0-108h PBM, and pooled human female and male blood ranged from 5.49 to 0.135ng/bed bug at 0-96h PBM. Human autosomal STR complete profiles were obtained until 72h PBM for female, male, and pooled human blood. These results reveal that identification of multiple human hosts is possible from a single bed bug. However, the ratio of each contributor may be variable depending on the amount of blood ingested from each individual and the time difference of blood consumed from each subject. Average peak heights for three STR markers of low (D3S1358), medium (D13S317), and high molecular weight (D2S1338), were also compared over time. Peak heights were consistently higher for the low molecular weight marker over all time intervals. These data suggest that some markers can be successfully recovered more than three days PBM. Hence, bed bugs can serve as physical evidence in temporal and spatial predictions to match suspects and/or victims to specific locations in criminal investigations., (Copyright © 2018 Elsevier B.V. All rights reserved.)
- Published
- 2018
- Full Text
- View/download PDF
28. Power clashes limit science and reflect archaic values.
- Author
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Uriarte M, Weathers K, and Eviner V
- Subjects
- Competitive Behavior, Research Personnel standards, Workforce, Power, Psychological, Research Personnel psychology, Science standards
- Published
- 2006
- Full Text
- View/download PDF
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