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47 results for “2014-2015”
Bird Communities in Forest Openings at Harvard Forest 2014-2015
Currently, many of the most severely declining neotropical migrants in the northeastern United States are disturbance dependent, early-successional species. Much of their decline is attributed to loss of suitable habitat. Large clearcuts (>5.0 ha) are widely considered to be optimal habitat for most shrubland bird species. However, it is well documented that certain species are capable of breeding within significantly smaller patches of habitat (less than 2.0 ha), which are most commonly created through group selection harvest cuttings. The goal of this research is to determine habitat characteristics translatable to habitat value for shrubland birds for use in conservation programs to maximize biological value. This research will provide an assessment of the value of forest openings for shrubland birds, helping to define the suitability of forest canopy openings for specific bird species. This project will describe the conservation value of shrubland openings deemed too small to sustain full suites of specialist shrubland birds by providing threshold patch area values for individual species able to use these smaller patches.
Effects of Warming on Soil Biogeochemistry at Harvard Forest 2014-2015
More than two decades of experimental soil warming in the Prospect Hill tract of the Harvard Forest has revealed non-linear soil respiration (HF005) and soil carbon loss patterns (Melillo et al., Science, 2017). The datasets here were collected to evaluate how the quantity and quality of soil carbon has been affected by 5C warming, and to assess the role that altered extracellular enzyme allocation may play in this. We collected soils over the 2014 growing season, after 23 years of soil warming. We confirmed previous results that warming had depleted the soil of organic matter, and this was accompanied by an overall decrease in microbial biomass particularly apparent in the forest floor in the fall. Using pyrolysis-GCMS, we found that the relative abundance of soil organic matter compound classes was unaffected by warming in the upper organic horizon (“forest floor”). However, lipids increased in relative abundance to the detriment of polysaccharides and lignin in the upper mineral soil, where warming had depleted soil mineral surfaces of organic matter. Despite these changes in soil organic matter quantity and quality, the potential extracellular enzyme activity per gram of soil was unaffected by warming treatment under common lab conditions. However, under in-situ temperature conditions, warming increased enzyme activity per unit microbial biomass, indicating heated plot microbes get better return on their enzyme investment than those in control plots.
Water stable isotopes for streams samples in Mary's River Watershed, 2014-2015
Water samples were collected for analysis of water stable isotopes (O18/16 and H2/H1) in the Marys River basin of Benton County, Oregon. Water samples collected approximately monthly between 2014 and 2015 at 24 streams.
Periphyton, hydrological and environmental data in a coastal freshwater wetland (FCE), Florida Everglades National Park, USA (2014-2015)
The characteristic, calcareous periphyton mats of the Everglades, and particularly their diatom assemblages, provide an ideal community to study the patterns and mechanisms of community assembly along environmental gradients with ecotones. Understanding patterns and mechanisms of diatom community assembly along salinity and P gradients can be incorporated into tools for predicting changes in these gradients, and the location and movement of the "white zone" ecotone, caused by saltwater intrusion and water management outcomes in the Southern Everglades. Patterns of environmental variation and periphytic-diatom community structure along the freshwater-marine gradient of Everglades National Park, FL., USA were examined by sampling along a series of 7 transects extending from oligotrophic, freshwater marshes through the ecotone and down to the northern edge of the fringing mangrove forests. Seven transects spanning the west-east extent of the southeast Everglades, from the Main Park Road in the west to the Model Lands in the east, were sampled once in the dry season (May) and once in the wet season (November) of 2014 and 2015. These data are published in "Mazzei and Gaiser. 2018. Diatoms as tools for inferring ecotone boundaries in a coastal freshwater wetland threatened by saltwater intrusion. Ecological Indicators. 88:190-204."
Under-ice lake physicochemical data, Missisquoi Bay and Shelburne Pond, Vermont, USA, 2014-2015
This dataset contains under-ice physicochemical data from Missisquoi Bay and Shelburne Pond in Vermont, USA collected during the 2013-2014 and 2014-2015 winters and spring thaw periods. The main dataset contains data for ice depths, water column sampling depths, nutrient chemistry, chlorophyll a, and relevant physicochemical variables. Ancillary data includes nearby air temperature data for the study periods as well as river discharge data for contributing or nearby tributaries. Data collection is complete.
Ecological Forestry in Western Oregon: A Critical Analysis from Andrews Forest LTER Research, 2014-2015
This work highlights the normative dimensions of “ecological forestry,” a strategy of forest management that uses silviculture to mimic the effects of non-anthropogenic processes of disturbance and succession in order to meet multiple objectives on a single piece of land. An analysis of the arguments made about ecological forestry, both broadly theoretical and pertaining specifically to western Oregon, shows that empirical uncertainties and normative gaps need to be addressed before we can make a clear, well-reasoned decision about whether ecological forestry is a viable and appropriate strategy for forest management and conservation.
Amazon EC2 Spot Price History: 2014--2015, 2017--2023
<p>Spot price history for Amazon EC2 instances for various regions collected from 2014 to 2015, and 2017 to 2023.</p>
HOBITSS earthquake catalog 2014-2015, Hikurangi margin, New Zealand
<p>We include here the full catalog of microearthquake seismicity using the Hikurangi Ocean Bottom Investigation of Tremor and Slow Slip” (HOBITSS) experiment. This catalog is part of a paper submitted to JGR in December 2018. Full catalog details are included in the main manuscript, and the results are considered preliminary until the paper is published</p> <p>Yarce2019_catalog_events.dat file has a more clean up version from the previous one, it states number of P and S phases separately and the total amount of arrivals. It also shows the time in Date Time format in addition to the epoch time format that was already in.</p> <p>[October 10, 2022] We have included the file Yarce2019_catalog_arrivals.csv that contains the arrival data of P and S wave arrivals for the events in the catalog. The last version of the catalog (v3) remained unmodified.</p>
Fig. 5 in Avian trichomonosis mortality events in band-tailed pigeons (Patagioenas fasciata) in California during winter 2014-2015
Fig. 5. Haemotoxylin and eosin staining (left) of the oral tissue of a band-tailed pigeon (Patagioenas fasciata monilis) recovered during an avian trichomonosis mortality event showing a diffuse thick layer of necrosis extending through the submucosa and multifocally into the deeper soft tissue layers and skeletal muscle; scale bar is 200 μm. Immunohistochemical staining (right) of trichomonad antigen (red) of the same bird demonstrating large numbers of trichomonads in the oral tissue; scale bar is 50 μm. (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)
Fig. 2 in Avian trichomonosis mortality events in band-tailed pigeons (Patagioenas fasciata) in California during winter 2014-2015
Fig. 2. Examples of caseonecrotic lesions (white arrowheads) in the oral cavity and upper digestive tracts of band-tailed pigeons (Patagioenas fasciata monolis) collected during an avian trichomonosis mortality event in California, U.S.A., between November 2014 and June 2015. Birds collected from Contra Costa County (A), Marin County (B), and Monterey County (D) in January 2015 and Placer County (E) in February 2015.
Fig. 4 in Avian trichomonosis mortality events in band-tailed pigeons (Patagioenas fasciata) in California during winter 2014-2015
Fig. 4. Body cavity with no adipose (white arrowheads) reserves (A.1) and the caseonecrotic lesions (white arrowheads) in the oral cavity (A.2) of a band-tailed pigeon (Patagioenas fasciata monolis) collected during an avian trichomonosis mortality event in Ventura County, California, U.S.A., in January 2015. Body cavity with abundant adipose (white arrowheads) reserves (B.1) and the caseonecrotic lesions (white arrowheads) in the oral cavity and upper digestive tract (B.2) of a band-tailed pigeon collected during an avian trichomonosis mortality event in Santa Clara County, California, U.S.A., in January 2015.
Fig. 3 in Avian trichomonosis mortality events in band-tailed pigeons (Patagioenas fasciata) in California during winter 2014-2015
Fig. 3. Caseonecrotic lesions (white arrowheads) in the right eye socket (A) and oral cavity (B) of a band-tailed pigeon (Patagioenas fasciata monolis) collected during an avian trichomonosis mortality event in Santa Clara County, California, U.S.A., in January 2015.
Fig. 1 in Avian trichomonosis mortality events in band-tailed pigeons (Patagioenas fasciata) in California during winter 2014-2015
Fig. 1. Number of band-tailed pigeon (Patagioenas fasciata monolis) mortality reports from phone, email, and online form received by county by the California Department of Fish and Wildlife (CDFW; Rancho Cordova, CA) and the California Department of Public Health (Richmond, CA) between November 2014 and June 2015 in California, U.S.A. (A). Number of band-tailed pigeons admitted to wildlife rehabilitation centers in California, U.S.A. and compiled by county between January and December 2015 (B). Number of band-tailed pigeon carcasses collected by county and received by CDFW between November 2014 and June 2015 in California, U.S.A. (C).
Silkkitie (Valhalla) vendor and product data 2014-2015
<p>Silkkitie, another name for Valhalla, was a marketplace that operated behind the Tor anonymity network. It mostly dealt in illicit drugs. This dataset contains product page information from 2014 to 2015. There is a JSON file with a list of the sellers and products available for each day. The fluctuating in-stock values make it possible to estimate the volume of transactions. A few screenshots are included.</p> <p><strong>Author</strong></p> <p>Juha Nurmi (Tampere University, Tampere, Finland)</p> <p><strong>Funding</strong></p> <p>This project has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation programme under project number 952622 (SPIRS).</p>
Dataset 4 of 8: Particulate matter PM2.5 concentrations in California (2014-2015) (CARB 19RD004)
Open the record for dataset details and reuse information.
Vascular Root Biomass and N Concentrations at Two Depths in an Alberta Peatland Subjected to Increasing Nitrogen Deposition, 2014-2015
Development of the oil sands has led to increasing atmospheric N deposition, with values as high as 17 kg N ha-1 yr-1; regional background levels <2 kg N ha-1 yr-1. Bogs, being ombrotrophic, may be especially susceptible to increasing N deposition. To examine responses to N deposition, over five years, we experimentally applied N (as NH4NO3) to a bog near Mariana Lakes, Alberta, at rates of 0, 5, 10, 15, 20, and 25 kg N ha-1 yr-1, plus controls (no water or N addition). From 2014-2015, we examined the effects of N addition on root production and nitrogen assimilation in those roots by measuring root biomass at two depths and root production over one and two years. Root biomass in the 0-15 cm and 15-30 cm depth increments in peat increased with increasing N input; the response was similar in the two depth increments. Root production integrated over the top 30 cm of peat increased with increasing N input at a rate of 5.3 g m-2 yr-1 with an increase in N input of 1 kg N ha-1 yr-1. Water addition alone had no significant effect on root biomass (p > 0.72) or root production. Given the rather consistent finding increasing N deposition stimulates aboveground vascular plant biomass and production, and our results that root biomass and production at Mariana Lakes Bog are stimulated as well, further work on belowground responses seems warranted.
Shrub Growth, NPP, and Nitrogen Assimilation for Two Years in an Alberta Peatland Subjected to Increasing Nitrogen Deposition, 2014-2015
Development of the oil sands has led to increasing atmospheric N deposition, with values as high as 17 kg N ha-1 yr-1; regional background levels <2 kg N ha-1 yr-1. Bogs, being ombrotrophic, may be especially susceptible to increasing N deposition. To examine responses to N deposition, over five years, we experimentally applied N (as NH4NO3) to a bog near Mariana Lakes, Alberta, at rates of 0, 5, 10, 15, 20, and 25 kg N ha-1 yr-1, plus controls (no water or N addition). In July of each year, we collected new growth of the three shrub species, returned them to the lab, and analyzed them. Non-destructive measurement of aboveground NPP for the three dominant shrub species, Andromeda polifolia, Chamaedaphne calyculata, and Rhododendron groenlandicum was based on allometric equations developed. Results for species were varied, however, water addition alone had no significant effect on NPP for any of the species or for the dominant shrubs combined in either 2014 or 2015 (p >= 0.47). The mass of newly produced shoot segments for Chamaedaphne calyculata, Andromeda polifolia, Rhododendron groenlandicum, and these three dominant shrubs combined all increased with increasing N input. As N input increased, the number of newly produced shoots (vegetative buds m-2) increased linearly for A. polifolia and the three shrub species combined. The number of newly produced shoots increased up to 16.6 ± 2.5 kg N ha-1 yr-1 and then decreased for C. calyculata and was unaffected for R. groenlandicum. Shrub growth response to increased N could lead to a shading out of the underlayer of mosses changing the bog and potentially compromising its structure and function.
Sphagnum and Vascular Plant Decomposition under Increasing Nitrogen Additions: 2014-2015
Development of the oil sands has led to increasing atmospheric N deposition, with values as high as 17 kg N ha-1 yr-1; regional background levels <2 kg N ha-1 yr-1. Bogs, being ombrotrophic, may be especially susceptible to increasing N deposition. To examine responses to N deposition, over five years, we experimentally applied N (as NH4NO3) to a bog near Mariana Lakes, Alberta, at rates of 0, 5, 10, 15, 20, and 25 kg N ha-1 yr-1, plus controls (no water or N addition). In May of each year, we collected mixed vascular plant tissue and Sphagnum fuscum peat and placed homogenized mixtures in nylon bags and placed them approximately 10 cm below the peat surface in early June. Bags were collected again in October of each year, cleaned, dried, and weighed. Decomposition of Sphagnum moss and mixed vascular plant litter was affected by N inputs, on average losing 8 and 38 % of initial mass, respectively, over 5 months of decomposition. Water addition alone had no significant effect on decomposition of cellulose, Sphagnum, or vascular plant litter (p > 0.15).
Vascular Root Biomass and Production at Two Depths in an Alberta Poor Fen Subjected to Increasing Nitrogen Deposition, 2014-2015
Development of the oil sands has led to increasing atmospheric N deposition, with values as high as 17 kg N ha-1 yr-1; regional background levels <2 kg N ha-1 yr-1. To examine responses to N deposition, over five years, we experimentally applied N (as NH4NO3) to a poor fen near Mariana Lake, Alberta, at rates of 0, 5, 10, 15, 20, and 25 kg N ha-1 yr-1, plus controls (no water or N addition). From 2014-2015, we examined the effects of N addition on root production by measuring root biomass at two depths and root production over one and two years. Root biomass, measured in 2014, increased with increasing N addition in the 0-15 and 15-30 cm depth increments. Root production increased with increasing N addition in the 0-15 cm, but not the 15-30 cm depth increment; annual root production in the 0-15 cm depth increment was higher when ingrowth bags remained in the peat for two growing seasons, compared to first-year root production. As a result, over the top 30 cm, annual root production was greater when ingrowth bags were in the peat for two growing seasons. We expected a threshold N addition level associated with stimulation of root production but found no evidence of such a threshold at Mariana Lake Poor Fen. Given the rather consistent finding increasing N deposition stimulates aboveground vascular plant biomass and production, and our results that root biomass and production at Mariana Lakes Bog are stimulated as well, further work on belowground responses seems warranted.
Eight Mile Lake Research Watershed, Carbon in Permafrost Experimental Heating Research (CiPEHR): Foam Insulation of Soil, 2014-2015
The Carbon in Permafrost Experimental Heating Research (CiPEHR) project addresses the following questions: 1) Does ecosystem warming cause a net release of C from the ecosystem to the atmosphere?, 2) Does the decomposition of old C, that comprises the bulk of the soil C pool, influence ecosystem C loss?, and 3) How do winter and summer warming alone, and in combination, affect ecosystem C exchange? We are answering these questions using a combination of field and laboratory experiments to measure ecosystem carbon balance and radiocarbon isotope ratios at a warming experiment located in an upland tundra field site near Healy, Alaska in the foothills of the Alaska Range. For this specific experiment we asked whether foam could be used to insulate the soil in the Fall season when there is no snow.
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Allen Brain Atlas
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Annotated Behaviour and Observability Dataset (ABODe)
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.