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openCC (other)Nov 2022View details →

Rocky Mountain National Park bulk inorganic N deposition in close proximity to roads, summer 2021

Vehicles are an important source for N deposition that may negatively impact roadside ecosystems. While elevated roadside N deposition has been found in many locations, it is not yet known if vehicle emissions cause measurable increases of N deposition in complex, mountainous terrain adjacent to roads. To address this, this study investigated the effect of vehicle N emissions on throughfall (through trees) and open N deposition in a high traffic corridor in mountainous terrain of Rocky Mountain National Park, Colorado, USA. We measured bulk (wet + dry) atmospheric N deposition in throughfall and open samplers on transects of 750 (throughfall) and 225 (open) m moving away from the road using ion exchange resin (IER) collectors. This dataset contains inorganic nitrogen deposition data from this study.

openCC (other)Apr 2022View details →

Inorganic nitrogen, microbial ecoenzymatic activities, and organic matter in soils collected from the Monsoon Rainfall Manipulation Experiment (MRME), Sevilleta National Wildlife Refuge, New Mexico during the 2014 growing season

Drylands are characterized by a pulse dynamics framework in which episodic rain events trigger brief pulses of biological activity and resource availability that regulate primary production in these ecosystems. Relatively small rain events can stimulate microbial processes like decomposition that release inorganic nitrogen needed by plant processes, which typically also depend on soil moisture received from larger rain events. Little is known how changes in rainfall patterns may affect plant available nitrogen in dryland soils, particularly across temporal scales. Therefore, we conducted a study to examine the daily and seasonal responses of plant available nitrogen to rain events that differed in size and frequency throughout a summer monsoon in a northern Chihuahuan Desert grassland located in the Sevilleta National Wildlife Refuge, New Mexico, USA. This data package, which accompanies an associated manuscript (Brown et al. 2022), contains measurements of inorganic nitrogen, nitrogen-acquiring microbial ecoenzymatic activities, and organic matter in soils collected from the Monsoon Rainfall Manipulation Experiment (MRME) during the 2014 summer growing season.

Pre-labeled dissolved inorganic carbon, carbon dioxide, and methane from experiemental plots near Toolik Lake, AK from 2000

Dissolved inorganic carbon, carbon dioxide, and methane in waters from pre-labeled wet sedge plots near Toolik Lake, AK during the summer of 2000.

Pre-labeled dissolved inorganic carbon, carbon dioxide, and methane from experiemental plots near Toolik Lake, AK from 2001

Dissolved inorganic carbon, carbon dioxide, and methane in waters from pre-labeled wet sedge plots near Toolik Lake, AK during the summer of 2001.

Pre-labeled dissolved inorganic carbon, carbon dioxide, and methane from experiemental plots near Toolik Lake, AK from 2003

Dissolved inorganic carbon, carbon dioxide, and methane in waters from pre-labeled wet sedge plots near Toolik Lake, AK during the summer of 2003.

Pre-labeled dissolved inorganic carbon, carbon dioxide, and methane from experiemental plots near Toolik Lake, AK from 2005

Dissolved inorganic carbon, carbon dioxide, and methane in waters from pre-labeled wet sedge plots near Toolik Lake, AK during the summer of 2005.

Pre-labeled dissolved inorganic carbon, carbon dioxide, and methane from experiemental plots near Toolik Lake, AK from 2006

Dissolved inorganic carbon, carbon dioxide, and methane in waters from pre-labeled wet sedge plots near Toolik Lake, AK during the summer of 2006.

Inorganic Nitrogen and phosphorus were analyzed on snow samples taken from two snow pits near the long-term acrtic LTER mesic acidic tussock experimental plots Toolik Field Station 2003

Inorganic Nitrogen and phosphorus were analyzed on snow samples taken from two snow pits near the long-term acrtic LTER mesic acidic tussock experimental plots. The snow layers in each pit were described and sampled separtely with the help of Matthrew Sturm.

Concentration of dissolved inorganic carbon (DIC), carbon and nitrogen concentrations, C:N ratios and del 13C isotope value for lakes and rivers on North Slope from Brooks Range to Prudhoe Bay, Arctic LTER 1988 to 2005

Composite file describing plant, animal, water, and sediment samples collected at various sites near Toolik Research Station (68 38'N, 149 36'W). Sample site descriptors include an assigned number specific to the file, a number that relates the samples to other samples collected on the same date and time (sortchem), site, date, time, and depth. Samples are identified by type, category, and a short description. Data include isotope values, carbon and nitrogen concentrations, and C:N ratios of samples.

openOpenApr 2010View details →

The effects of nitrogen and warming on inorganic nitrogen pool and production rates in arctic and boreal ecosystems: inorganic nitrogen transformation during a 3-month laboratory incubation

We incubated (2006) northern Alaskan soils (boreal and tundra) at two temperatures (5 degC and 15 degC) and two levels of nitrogen addition (with and without) to directly test for nitrogen limitation of inorganic nitrogen production rate and explore the interaction between temperature and nitrogen limitation. Over the 3-month laboratory incubation, we measured initial extratable inorganic nitrogen and inorganic nitrogen production rates from organic and mineral soils from four different ecosystem types (boreal burned, boreal unburned, moist acidic, moist non-acidic). To charactarize the soils, we also measured total C, total N, microbial biomass, isotopes values (delta 13, delta14), total free amino acid, and total soluble protein.

openCC0Sep 2024View details →

Measurements, from CCE LTER process cruises in the California Current region, of total dissolvable inorganic concentrations of the nutrient iron, 2017 - (ongoing).

Seawater profiles or discrete samples for total dissolvable iron (TDFe) analysis are collected with the trace metal rosette or GO-FLO bottles, respectively, in stations located within the CCE LTER region in the California Current System. The total dissolvable iron concentration is obtained by collecting unfiltered seawater samples in 250 mL LDPE bottles and storing them at pH 1.8 for 6 months or more. The acidified seawater sample is then filtered using acid cleaned 0.4 um PES membrane Titan 3 syringe filters and determined by flow injection chemiluminescent (FI-CL) analysis at Scripps Insitution of Oceanography since 2017 (ongoing).

openOpenNov 2014View details →

McMurdo Dry Valleys Dissolved Inorganic Nitrogen Concentrations in Lakes

The McMurdo Long Term Ecological Research (LTER) project monitors patterns of inorganic material transport in perennial ice-capped lakes. This data set addresses this core area of research and quantifies dissolved inorganic nitrogen concentrations at specific depths in McMurdo Dry Valley lakes.

openCC (other)Mar 2020View details →

SBC LTER: Beach: Data to support "Contribution of macroalgal wrack consumers to dissolved inorganic nitrogen concentrations in intertidal pore waters of sandy beaches"

These data describe measures of excretion from talitrid amphipods (Megalorchestia corniculata) fed giant kelp (Macrocystis pyrifera) blades and incubated in a series of mesocosms during May 2018. Data are contained in one table: time series of mesocosm porewater nutrient concentrations measured twice daily for approximately one week (two full trials included in this dataset). This dataset is to support the article: Lowman, H. E., Emery, K. A., Kubler-Dudgeon, L., Dugan, J. E., & Melack, J. M. (2019). Contribution of macroalgal wrack consumers to dissolved inorganic nitrogen concentrations in intertidal pore waters of sandy beaches. Estuarine, Coastal and Shelf Science. https://doi.org/10.1016/j.ecss.2019.02.004

opencc-by-4.0Jan 2020View details →

Organic and Inorganic Nutrients in the North Pacific from the 2017 cruise MGL1704 (Gradients 2)

Data on organic and inorganic nutrients in unfiltered seawater that was sampled aboard the Gradients 2 cruise (MGL1704) in 2017 along a transect from Hawaii to 42 degrees north along a longitude of 158 degrees west. Seawater was collected into HDPE or polypropylene bottles and immediately frozen. Silicate, phosphate and nitrate+nitrite are determined colormetrically on a SEAL Analytical Autoanalyzer (AA3 with HR detectors), with the exception of nitrate+nitrite that is <0.5umol/L, which is analyzed by chemiluminescence. Total phosphorus (TP) and total nitrogen (TN) are determined by analysis of phosphate and nitrate, respectively, after oxidation by high-intensity ultraviolet light. Total organic phosphorus and total organic nitrogen are determined by subtracting background PO4 and NO3+NO2 from TP and TN, respectively. Total organic carbon is determined by combustion on a Shimadzu TOC-V analyzer.

opencc-by-4.0Feb 2017View details →

Anacostia Watershed Study: Base Cations, Inorganic Carbon, and Water Quality

Campus Creek and Paint Branch Creek are two urban streams in the Anacostia River watershed.  Both sampling sites for these two streams are located on the campus of the University of Maryland, College Park. Please see Kaushal 2019 for further site descriptions. Data on following pages is for water quality that has been published in Kaushal et al. 2017, Haq et al. 2018, Kaushal et al. 2018, Kaushal et al. 2019.

opencc-by-4.0Oct 2020View details →

Research data for "Understanding the geometric diversity of inorganic and hybrid frameworks through structural coarse-graining"

This dataset supports the paper: "Understanding the geometric diversity of inorganic and hybrid frameworks through structural coarse-graining", available at the following DOI: 10.1039/d0sc03287e. The cleaned-up, coarse-grained, and re-scaled structures are provided here in both XYZ and CIF format.  The data presented in the journal publication is also included; namely, MDS coordinates, T densities, and A-site heterogeneities for each structure in the dataset.  T densities -- defined as: metals per unit volume (nm-3) -- are calculated using the re-scaled structures.

opencc-by-4.0Nov 2015View details →

Conceptual model of uptake of inorganic carbon by the sulfur-oxidizing γ1-symbionts and transfer to their host, the gutless marine worm Olavius algarvensis

Conceptual model of uptake of inorganic carbon by the sulfur-oxidizing γ1-symbionts and transfer to their host, the gutless marine worm Olavius algarvensis.

dryad36/100

Regime shift in secondary inorganic aerosol formation and nitrogen deposition in the rural US

Secondary inorganic aerosols (SIA) play an important role in air pollution and climate change, and their formation modulates atmospheric deposition of reactive nitrogen (Nr; including oxidized and reduced nitrogen), impacting the nitrogen cycle. Large-scale and long-term analyses of SIA formation based on model simulations have significant uncertainties. Here, we improve constraints on SIA formation using decade-long in-situ observations of aerosol composition and gaseous precursors from multiple monitoring networks across the US. We reveal a shift in the formation regime of SIA in the rural US between 2011 – 2020, making rural areas less sensitive to changes in ammonia (NH3) concentrations and shortening the effective atmospheric lifetime of reduced forms of Nr. This leads to potential increases in Nr deposition near NH3 emission hotspots, with ecosystem impacts warranting further investigation. NH3, a critical but not directly regulated precursor of fine particulate matter (PM2.5) in the US, has been increasingly scrutinized to decrease PM2.5. Our findings, however, show controlling NH3 became significantly less effective for mitigating PM2.5 in the rural US. We highlight the need for more collocated aerosol and precursor observations for better characterization of SIA formation in urban areas and regions increasingly impacted by wildfires and dust.

opencc-zeroMar 2024View details →