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2,532 results for “at present”
Ground Water Depth Readings at BCEF/LTER Floodplain Sites, 1991-Present: Weekly
Ground water depth readings were collected at BCEF/LTER floodplain sites beginning in 1991. Wells were visited and measured weekly during the growing season.
Ground Water Depth Readings at BCEF/LTER Floodplain Sites, 1991-Present: Hourly
Campbell CR7 dataloggers were used at FP1A, FP2A, and FP4A to measure ground water and river levels (river levels only at FP4A) during the summer growing season. Each site has four wells being monitored and any river levels are in addition to these wells. A Druk Inc. sensor (model PDRC 10/D) was placed at the bottom of the 3 meter by 15 cm PVC well tubes and calibrated to output depth from forest floor to groundwater. Sensors are scanned every 5 minutes and hourly averages are output to a storage module.
Tanana River Yearly Ice Break Up Observed at Nenana, AK (1917 - Present)
This is a Yearly observation of when the ice on the Tanana River breaks up. This data is hosted originally by the National snow and ice data enter(http://nsidc.org/). The data is located at http://nsidc.org/data/docs/daac/nsidc0064_nenana.gd.html.
APEX fen Raised plot soil temperatures, 2005-Present
Soil temperature measurements were recorded hourly at an array of depths at APEX Fen beginning June 2005. APEX Fen is located in the Bonanza Creek LTER outside of Fairbanks, AK. APEX Fen uses a full-factorial water table (flooded or raised, lowered or drained, and control treatments, as well as a moisture gradient) by warming manipulation (warmed, unwarmed treatment).
APEX fen Lowered plot soil temperatures, 2005-Present
Soil temperature measurements were recorded hourly at an array of depths at APEX Fen beginning June 2005. APEX Fen is located in the Bonanza Creek LTER outside of Fairbanks, AK. APEX Fen uses a full-factorial water table (flooded or raised, lowered or drained, and control treatments, as well as a moisture gradient) by warming manipulation (warmed, unwarmed treatment).
Air Temperature and Relative Humidity at Long Term Tree Growth Sites; 1989-Present: Hourly
This dataset contains the hourly output for Air Temperature and Relative Humidity sensors located at various Long Term Tree Growth Plots (LTTG).
Soil Temperature measurements at Long Term Tree Growth Sites; 1989-Present: Hourly
This dataset contains the hourly output for Soil Temperature sensors located at various Long Term Tree Growth Plots (LTTG).
Air Temperature and Relative Humidity at Long Term Tree Growth Sites; 2001-Present: Hourly
This dataset contains the hourly output for Air Temperature and Relative Humidity sensors located at various Long Term Tree Growth Plots (LTTG). In addition to expanding the number of sites being monitored, some sites contain Omnidata Easy Loggers in which ES-110 sensors used to measure AT/RH have exceeded their lifespan . This dataset is to expand on and replace those older sensors to ensure a continueing dataset.
Snowshoe hare physical data in Bonanza Creek Experimental Forest: 1999-Present
Snowshoe hares, Lepus americanus, are a 'keystone' prey species in northern boreal forests and experience population fluctuations of 8-11-years. Despite intense responses of both vegetation and predators to changes in hare densities, landscape-scale comparisons of hare populations in Alaska have been limited to qualitative descriptions. We conducted capture-recapture studies of snowshoe hares at 5 locales in the Tanana valley, from Tok in the east to Clear in the west from 1999 to 2002. Snowshoe hare densities were highest in 1999 ( =6.36 ha-1, SE=0.63) and declined thereafter. We were unable to detect declines in apparent survival during declining densities in our study populations. Movement distances did not vary temporally and persistence of individuals through declining densities may be associated positively with body condition at the peak. The relationship of hare pellets and hare densities was weak and limits the utility of this methodology for estimating hare densities in Interior Alaska.
Fates and morphometrics of snowshoe hares collared in Bonanza Creek Experimental Forest from 2008 to present
This dataset contains the fates and morphometric measurements of snowshoe hares collared in Bonanza Creek Experimental Forest, including dates of collaring and recovery, cause or mortality, weight, hind foot length, and sex.
Rain, well and river water oxygen and deuterium isotope analyses/values for Bonanza Creek Experimental Forest and LTTG sites ( 2002 - Present)
Isotope values for oxygen and hydrogen in waters provide information as to the source of the water, the climate at the time of collection, and the geographical location of the water source. Climate variations may be indicated in changes in the relationship between deuterium and 18O over an extended period. The sources and proportions of sources of ground water can be determined by isotope analysis. Rain, well and river waters were analyzed for ?18O and ?D values from LTER and LTTG sites in 2002, and LTER1, LTER2, UP2, and FP3 sites from 2003 on. Deuterium values were not replicable until the latter part of the 2005 field season and so were not reported until August, 2005.
Litter Trap Results at the Tanana River Exclosures: 2001 - Present
This study examines the effects browsing by mammals has on the function of the Alaskan taiga ecosystem. The primary emphasis is the effects that browsing in winter by snowshoe hares (Lepus americanus) and moose (Alces alces) have on vegetation composition, leaf litter biomass, and growth of deciduous shrubs on the floodplain of the Tannana River. Nine 50m X 20m exclosures were originally established in the willow stage and alder stage of succession in 1988 which have been used to evaluate the effect of browsing on vegetation dynamics, element cycling, soil chemistry. Additionally, the effect on vegetation type on the diversity and abundance of neotropical birds as well as ground-dwelling invertebrates populations on the the Tannana floodplain has been examined. This is an ongoing study.
Litterfall Weights From LTER Study Site Treatment Plots: 1990 - Present
Litter is measured within the nutrient treatment plots at LTER research sites located within the Bonanza Creek Experimental Forest. The 21 LTER treatment sites monitored for litterfall represent three replicates each of four successional stages of primary succession on the floodplain of the Tanana River and three stages of succession following wildfire in the uplands. Three litter trays are placed within each treatment at the 21 LTER sites. Litter trays are 0.5 m x 0.5 m wooden frames constructed of 1" x 4" boards with fine screen stapled to the bottom side. Litter is collected in the spring as soon after snowmelt as possible (usually in May) and in some years in the fall just before freeze-up as well. Litter collections bagged are removed to the lab where they are dried in ovens at 65 deg C for at least 48 hours. Each sample is then weighed to the nearest 0. 1 grams. In 2009 treatments A and C were dropped from the study after finishing the 20 year study.
Monthly average of sea level measurements from San Diego Harbor, the sea level average seasonal cycle, and the long term trend are presented, 1906 - 2024
Monthly average sea level measurements, and derived sea-level anomolies from San Diego Harbor's station (32°42.80N, 117°10.40W) is obtained from the University of Hawai’i Sea Level Center. The sea level average seasonal cycle and the long term trend are calculated (mm) from the monthly averages obtained from the GLOSS/CLIVAR (formerly known as the WOCE) "fast" sea level database - University of Hawaii Sea Level Center. The resulting anomalies of de-trended sea level are used as a mid-latitude index of El Niño.
Gut Fluorescence measurements of mesozooplankton grazing on autotrophic prey. Samples collected in the CCE-LTER region on Process Cruises from 2006 to the present. Summaries for each Lagrangian Cycle.
Mesozooplankton are collected with plankton nets (typically a 71-cm diameter, 202-um mesh Bongo net) and samples flash frozen at sea in liquid N2 for subsequent shore-based measurements of ingested phytoplankton chlorophyll-a. Measurements of mesozooplankton gut fluorescence are done by fluorometric analysis on a Turner Designs fluorometer of gut pigments extracted in 90% acetone. Analyses are done on mesozooplankton size-fractionated into 5 different categories on Nitex mesh (> 0.2 mm, 0.5 mm, 1.0 mm, 2.0 mm, 5.0 mm). The pigment content (as Chl-a and phaeopigments) is then expressed as mass of pigment ingested per m3 of water filtered, or divided by the dry weight biomass of the mesozooplankton in the same sample in order to obtain mass-specific ingestion per m3 of water. Application of published values of the temperature-dependent gut passage time are used to estimate the mesozooplankton grazing rate, as pigments ingested per m3 per unit time, or the corresponding mass-specific rate of ingestion. Samples for gut fluorescence assays have been collected on CCE-LTER Process Cruises since 2006 and these collections are ongoing.
Dry weight biomass measurements of net-collected mesozooplankton. Samples collected in the CCE-LTER region on Process Cruises from 2006 to the present. Summaries for each Lagrangian Cycle.
Mesozooplankton are collected with plankton nets (typically a 71-cm diameter, 202-um mesh Bongo net) and samples flash frozen at sea in liquid N2 for subsequent shore-based measurements of dry weight biomass. Measurements are made by weighing pre-tared Nitex mesh on an analytical balance, for mesozooplankton size-fractionated into 5 different categories (> 0.2 mm, 0.5 mm, 1.0 mm, 2.0 mm, 5.0 mm). Biomass is expressed as dry mass of zooplankton per m3 of water filtered, or when multiplied by the maximum depth of the tow, as integrated dry mass of zooplankton per m2 of sea surface. Samples for dry weight biomass have been collected on CCE-LTER Process Cruises since 2006 and these collections are ongoing.
North Temperate Lakes LTER: Southern Lake Spiny Water Flea 2016 - present
Beginning in 2016, vertical tows with a special zooplankton net were collected in the lakes of the Yahara River specifically for the invasive Bythotrephes longimanus (spiny water flea). The net has a 400 micrometer mesh with a 0.5 meter diameter opening. Individuals are simply counted, and density is determined to be the number of individuals divided by the total water volume of each tow. The depth of the tow, and therefore the tow volume, varies by lake. Additional sampling for spiny water flea occurred 2009 - 2014 as a part of graduate student research (dataset knb-lter-ntl.343). Spiny water flea are also captured occasionally during our standard zooplankton tows of the southern lakes (knb-lter-ntl.90).
Configuration files for model stations presented in the manuscript "Sensitivity of shelf sea marine ecosystems to temporal resolution meteorological forcing"
<p>This repository contains configuration files for running GOTM-FABM-ERSEM at stations L4 and CCS to produce results presented in the manuscript "Sensitivity of shelf sea marine ecosystems to meteorological forcing" in addition to meteorology files for running the sensitivity analysis presented in the manuscript. Ncfiles containing model results for all scenarios presented in the manuscript are also included within the zip files for both stations</p> <p><br> GOTM code is freely available from: <br> https://github.com/gotm-model/code</p> <p><br> FABM code is freely available from:<br> https://github.com/fabm-model/fabm.git</p> <p><br> ERSEM code is freely available from:</p> <p><a href="https://www.pml.ac.uk/Modelling_at_PML/Access_Code">https://www.pml.ac.uk/Modelling_at_PML/Access_Code</a><br> </p> <p>Instructions for compiling GOTM-FABM-ERSEM can be found in the ERSEM git repository after registering for the code using the link above. </p> <p>Versions/commits for the model code used to create results presented in this manuscript are:</p> <p>GOTM: commit 38e5d5b77adc7b3b5364aed7d7e4921b04b1781f </p> <p>FABM: commit 69da88c87ec59a51d1e2143c1f76111526ed6498 </p> <p>ERSEM: Version 19.04</p> <p> </p> <p> </p>
Appendix. Generic nomenclature adopted in the present paper for the nominal species of the Tortonian, which were previously reported under open generic nomenclature. in Tortonian teleost otoliths from northern Italy: taxonomic synthesis and stratigraphic significance
Appendix. Generic nomenclature adopted in the present paper for the nominal species of the Tortonian, which were previously reported under open generic nomenclature.
Figure 1 in The role of female cephalopod researchers: past and present
Figure 1. Bibliometric analysis of the papers presented during the CIAC 2012 Symposium. (A) Registrations by gender; (B) authorship of oral presentations by gender; (C) presenters of oral presentations by gender; (D) authorship of poster presentations by gender.
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
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.