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254 results for “SBC LTER”
SBC LTER: Regional Oceanic Modeling System (ROMS) Setup Files, Code, and Lagrangian Model Setup Files
This data contains all the necessary code, grid, forcing, initial, and boundary condition files for running the UCLA version of the Regional Oceanic Modeling System (ROMS) for the Santa Barbara Channel nested solution set that is analyzed in Dauhajre and McWilliams (2019): Nearshore Lagrangian Connectivity: Resolution Sensitivity and Submesoscale Influence. Along with this abstract and separate methods, a brief readme file (README_ROMS) contains other relevant details for running the simulations. The ROMS files in this data correspond to a one-way grid-nesting with the following horizontal resolutions: dx=1km, 300m, 100m, 36m that correspond to R1km, R300m, R100m, and R36m in the publication. In the data directories here, these grids have the following prefixes for all relevant files (grids, forcing, initial condition, and boundary conditions): “usw1” (dx=1km), “usw2” (dx=300m), “usw3” (dx=100m), and “usw4sbc” (dx=36m). The ROMS code is in fortran and requires compilation, with compilation instructions in the directory /src_ROMS_UCLA_2018 in the file “compile.sh”. All grid, forcing, initial, and boundary condition files are in netcdf form. The grid files are in the directory “grids”. Note that the R1km grid has 2 files: usw1_grd.nc and usw1_grd_samp.nc. The latter is a smaller version of the grid that focuses on the Santa Barbara Channel that can be used for the offline Lagrangian model for faster computation (which requires an analogous sub-sampling of the ROMS output). For running ROMS, usw1_grd.nc needs to be used as it corresponds to the entire domain. The atmospheric forcing, derived from a Weather Research and Forecasting model at dx=6km resolution is given in the directory “forcing_files”; all atmospheric forcing files are interpolated to the relevant ROMS grid and formatted to be used as inputs in ROMS. Each grid contains a file corresponding to precipitation (e.g., usw1_prec.nc), radiation (e.g., usw1_rad.nc), atmospheric temperature and specific humidity (
SBC LTER: Comparison of spherical and planar light sensors
Seafloor irradiance in permanent plots at three subtidal reefs off Santa Barbara, California was compared in spring 2016 using data collected from paired planar and spherical PAR sensors. The three reefs (Isla Vista 34° 23.275’N, 119° 32.792’W; Mohawk 34° 23.649’N, 119° 43.762’W; and Naples 34° 25.342’N, 119° 57.102’W) ranged in depth from 5.8 m to 8.9 m (MLLW) and were chosen to represent a range of physical and biological characteristics. The purpose of the comparison was to develop a method for calibrating irradiance data collected from the two types of sensors.
SBC LTER: REEF: Data to support "Niche Complementarity and Resistance to Grazing Promote the Invasion Success of Sargassum horneri in North America"
These data describe the results of surveys and manipulative experiments performed to investigate how niche complementarity, competition, and herbivory influence the success of the invasive seaweed Sargassum horneri. This data package includes five data tables and they are used to support the manuscript: Marks LM, Reed DC, Holbrook SJ (2020) Niche Complementarity and Resistance to Grazing Promote the Invasion Success of Sargassum horneri in North America. Diversity, 12(2)
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
SBC LTER: REEF: Annual benthic transect photo quad
This dataset is produced by analyzing nearly 1800 images in a cloud-based image analysis platform ViQi. The images were collected in SBC LTER’s long term benthic monitoring transects. This addition to our cloud environment will continue to improve our visual and interactive Connoisseur models. This project aims to contribute images and corresponding taxa to cloud-based image analysis system. We also compare the difference between benthic survey conducted by divers and using photo-quad imagery analysis. The images in this data set were collected during LTER’s 2018 benthic survey period. This data package includes two data tables: 1) percent cover of invertebrates, algae and fish from all of the SBC LTER’s benthic transects, as well as image location and water depth 2) the images download links for all images used in the analysis.
SBC LTER: OCEAN: Temperature to Nitrate Lookup Tables for the Southern California Bight
This dataset is the temperature and nitrate lookup table in the southern California Bight. The temperature and nitrate measurements were compiled from three campaigns in the Southern California Bight. The temperature and nitrate data were binned in different regions (onshore, offshore, northern, central, southern, and all regions) and seasons (summer, winter, all season) for generating the lookup table. See method for details. Please cite the following publication: Snyder, J. N., Bell, T. W., Siegel, D. A., Nidzieko, N. J., & Cavanaugh, K. C. (2020). Sea Surface Temperature Imagery Elucidates Spatiotemporal Nutrient Patterns for Offshore Kelp Aquaculture Siting in the Southern California Bight, 7(22), 1–14. https://doi.org/10.3389/fmars.2020.00022
SBC LTER: Ocean: Diel nearshore water profiles (CTD and chemistry) during stratified conditions
These data describe diel fluctuations in nutrient and physical measurements observed in the nearshore region of the Santa Barbara Channel (Goleta Bay) during the summer of 2018. Sampling took place over three, 36-hour campaigns in August 2018 and encompasses neap, midway, and spring tide conditions. Data are contained in two tables: 1) a time series of physical measurements (temperature, salinity, etc.) measured over time at three different depths, 2) a time series of chemical and biological measurements (ammonium, chlorophyll a, etc.) measured over time at three different depths.
SBC LTER : REEF: Ammonium excretion rates of macroinvertebrates
Consumers may be important mediators of nutrient cycling in giant kelp forests. To aid in this assessment, we measured the ammonium excretion rates of 17 species of macroinvertebrates which comprise 85-97% of the biomass among reefs surveyed by the LTER in the Santa Barbara Channel. We paired these species-specific data with time series of their standing biomass to assess their contributions to kelp forest nitrogen recycling and to examine patterns in their nutrient dynamics over annual and decadal scales. This is the data package supporting the article “Peters, JR, Reed, DC, Burkepile, DE. Climate and fishing drive regime shifts in consumer‐mediated nutrient cycling in kelp forests. Glob Change Biol. 2019; 25: 3179– 3192. https://doi.org/10.1111/gcb.14706”.
SBC LTER: Reef: Surge uptake capability in Macrocystis pyrifera in response to pulses of three different forms of nitrogen
This data describes the capacity of the giant kelp, Macrocystis pyrifera to exhibit surge uptake of three different forms of nitrogen in whole-blade incubation experiments done in spring and summer 2019. The data is contained in 2 tables: 1) uptake rates of 15N labeled nitrate, ammonium, and urea by blades exposed to pulses of nitrogen for periods lasting 1, 5, 15 and 45 min, 2) uptake rates of 15N labeled nitrate, ammonium, and urea for specific time intervals of pulsed nitrogen (e.g., 0-1 min, 1-5 min, 5-15 min and 15-45 min).
SBC LTER: Beach: Biodiversity and ecosystem functioning - sandy beach detritivore kelp consumption rates
These data describe the consumption rates of giant kelp (Macrocystis pyrifera) wrack by sandy beach detritivore species common to beaches in the Santa Barbara Channel during a laboratory experiment in August 2016. Species included Megalorchestia minor, Megalorchestia benedicti, Megalorchestia corniculata, Megalorchestia californiana, Phaleria rotundata, and Alloniscus perconvexus. The data file includes the mass of dry kelp consumed per day per individual, the mass of dry kelp consumed per day, and the total mass of dry kelp consumed over the 3-day experiment. There were 12 individuals per treatment and the kelp tissue was measured at the beginning and the end of the 3-night experiment. Consumption rates given here have been corrected for non-consumptive mass loss determined by control treatments with no consumers (4.0 ± 1.5% dry mass or 6.0 ± 2.5 mg).
SBC LTER: REEF: Macrocystis pyrifera biomass and environmental drivers in southern and central California
These data describe 1987-2019 time series of giant kelp (Macrocystis pyrifera) biomass and associated environmental variables (wave height, nitrate concentration, climate indices) at quarterly and annual time intervals. Data for spatially resolvable variables (giant kelp biomass, wave height, nitrate concentration) pertain to 361 coastline segments (500 m length) in southern and central California where giant kelp was persistent over the sampling period. Data are contained in 5 tables: 1) quarterly time series of giant kelp biomass, wave height, and nitrate concentrations for 361 coastline segments; 2) quarterly time series of aspatial climate indices (NPGO, MEI, PDO); 3) annual time series of giant kelp biomass, wave height, and nitrate concentrations for 361 coastline segments; 4) annual time series of aspatial climate indices (NPGO, MEI, PDO); 5) locations (latitude and longitude of center) of coastline segments. Kelp data are derived from satellite imagery using empirical relationships. Wave data are derived from an empirically validated swell propagation model. Nitrate data are derived from empirical relationships with remotely-sensed sea surface temperature.
SBC LTER: Reef: Net primary production, growth and standing crop of Macrocystis pyrifera in Southern California
This data package has been deprecated because the models/methods have been changed. Please see the new data package using updated models: Updated Kelp NPP packages. These data are a time series of net primary production (NPP), growth and standing crop for the giant kelp, Macrocystis pyrifera, that is appropriate for examining seasonal and inter-annual patterns across multiple sites. The standing crop and loss rates of M. pyrifera are measured monthly in permanent plots at three sites in the Santa Barbara Channel, USA. Collection of these data began in May 2002 and is ongoing. Seasonal estimates of NPP and growth rate are made by combining the field data with a model of kelp dynamics. The dataset includes plant density in each plot and censuses of fronds on tagged plants at each site. NPP, mass specific growth rate and standing crop are presented in four metrics (wet mass, dry mass, carbon mass and nitrogen mass) to facilitate comparisons with previous studies of M. pyrifera and with NPP measured in other ecosystems. A subset of these data covering the time period 2002-05-01 to 2007-12-31 were contributed to Ecological Archives as Data Paper E089-119-D1 in 2008 (citation: Andrew Rassweiler, Katie K. Arkema, Daniel C. Reed, Richard C. Zimmerman, and Mark A. Brzezinski. 2008. Net primary production, growth, and standing crop of Macrocystis pyrifera in southern California. Ecology 89:2068).
SBC LTER: Time series of kelp biomass in the canopy from Landsat 5, 1984 -2011
This data package has been deprecated because the models/methods have been changed. Please see the new data package using updated models: Kelp canopy biomass from Landsat 5, 7, and 8. These data are a time series of canopy biomass of the giant kelp, Macrocystis pyrifera, derived from LANDSAT 5 Thematic Mapper satellite imagery. The kelp canopy is composed of the portions of fronds floating on the surface of the water. Biomass data (wet weight, kg) are given for individual 30 x 30 meter pixels in the coastal areas extending from near Pt. Reyes, California, to Punta Abreojos, Baja California Sur, Mexico, including the Northern and Southern Channel Islands. Data were derived from Landsat 5 TM images. Observations are made on a 16 day reqeat cycle but the temporal coverage is irregular because of cloud cover and instrument failure. Estimates of kelp canopy biomass are derived from the relationship between satellite surface reflectance and empirical measurements of kelp canopy biomass in long-term SBC LTER study plots obtained using SCUBA. Data are organized into yearly files, and zipped to compress. In its entirety this dataset is large, more than 3 GB and 80 million lines. To receive an archive of all data, or for assistance with subsets (e.g., range of dates or a latitude/longitude) contact sbclter@msi.ucsb.edu.
SBC LTER: Beach: Dynamics of intertidal wrack consumer distributions on an SBC Beach
Distribution of Intertidal Wrack Consumer Beds Over Time Zonation of intertidal biota on sandy beaches is extremely dynamic and challenging to model due to the unstable nature of the sandy substrate and the high mobility of the biota. Distributions of these biota can shift strongly with tides, wave runup, storms, and beach conditions on a variety of temporal scales. High frequency measurements of the positions of intertidal beds of a mid and an upper shore invertebrate species, including wrack consuming talitrid amphipods (Megalorchestia spp) and a deposit feeding polychaete (Euzonus mucronata), were conducted on an SBC study beach, West Isla Vista, for one year.
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