This codebook.txt file was generated on 20210610 by wilsonkm ------------------- GENERAL INFORMATION ------------------- 1. Title of Dataset Dataset for Factors Regulating Lake Periphyton Biomass and Nutrient Limitation Status Across Large Trophic Gradient 2. Author Information Principal Investigator Contact Information Name: Andrew Camilleri Institution: University of Michigan Email: accamill@umich.edu Associate or Co-investigator Contact Information Name: Ted Ozersky Institution: University of Minnesota - Duluth Email: 3. Date of data collection: 2017-07-11 to 2017-08-28 4. Geographic location of data collection (where was data collected?): The coasts of Lake Superior, northern Lake Michigan, and Green Bay. 5. Information about funding sources that supported the collection of the data: -------------------------- SHARING/ACCESS INFORMATION -------------------------- 1. Licenses/restrictions placed on the data: CC0 1.0 Universal 2. Links to publications that cite or use the data: Ozersky, T, & Camilleri, A.C. Factors Regulating Lake Periphyton Biomass and Nutrient Limitation Status Across a Large Trophic Gradient. Freshwater Biology. In Review. 3. Recommended citation for the data: Camilleri, Andrew; Ozersky, Ted. (2021). Dataset for Factors Regulating Lake Periphyton Biomass and Nutrient Limitation Status Across Large Trophic Gradient. Retrieved from the Data Repository for the University of Minnesota, https://doi.org/10.13020/CWST-SE85. --------------------- DATA & FILE OVERVIEW --------------------- 1. File List A. Filename: SITES_PARAMETERS.csv Short description: Site locations and environmental parameters (water column nutrient concentrations, Kd, and chlorophyll) B. Filename: NDS_Chl_AFDW.csv Short description: Results from NDS experiments. 2. Are there multiple versions of the dataset? No -------------------------- METHODOLOGICAL INFORMATION -------------------------- 1. Description of methods used for collection/generation of data: Ozersky, T, & Camilleri, A.C. Factors Regulating Lake Periphyton Biomass and Nutrient Limitation Status Across a Large Trophic Gradient. Freshwater Biology. In Review. 2. Methods for processing the data:Nutrient Diffusing Substrata (NDS) with control, +nitrogen, +phosphorus, and +nitrogen and phosphorus treatments were deployed at 28 sites along the coast of Lake Superior, northern Lake Michigan, and Green Bay. Control NDS cups contained just 2% agar by weight while +nitrogen, +phosphorus, and +nitrogen and phosphorus treatments contained the agar and 0.5 M NH4Cl, KH2PO4, or both, respectively. Experiments were deployed between July 11-31, 2017 and retrieved 28-29 days later between August 8-28, 2017. Periphyton biomass as chlorophyll-a and ash free dry weight (AFDW) from NDS treatments were measured along with a suite of environmental variables. 3. Instrument- or software-specific information needed to interpret the data: 4. People involved with sample collection, processing, analysis and/or submission:Andrew Camilleri, Ted Ozersky ----------------------------------------- DATA-SPECIFIC INFORMATION FOR: NDS_Chl_AFDW.csv ----------------------------------------- 1. Number of variables: 5 2. Number of cases/rows: 561 rows 3. Missing data codes: N/A 4. Variable List A. Name: site Description: Site of NDS experiment. Value labels if appropriate B. Name: treat Description: Treatment, con: control, N: nitrogen, P: phosphorus, NP: nitrogen and phosphorus. Value labels if appropriate C. Name: chl.a_microg/cm2 Description: Periphyton biomass on NDS measured as chlorophyll-a (μg/cm2). Value labels if appropriate D. Name: AFWD_mg_cm2 Description: Periphyton biomass on NDS measured as AFDW (mg/cm2). Value labels if appropriate E. Name: replicate Description: Replicate number of sample (n=5). Value labels if appropriate ----------------------------------------- DATA-SPECIFIC INFORMATION FOR: SITES_PARAMETERS.csv ----------------------------------------- 1. Number of variables: 27 2. Number of cases/rows: 29 rows 3. Missing data codes: N/A 4. Variable List A. site Description: Site of NDS experiment. Value labels if appropriate B. lat Description: Latitude of site. Value labels if appropriate C. long Description: Longitude of site. Value labels if appropriate D. lake Description: Area where site is located. GB=Green Bay, MICH= North Shore of Lake Michigan, SUP: Lake Superior. Value labels if appropriate E. deployment date Description: Date of NDS deployment. Value labels if appropriate F. retrieval date Description: Date of NDS retrieval. Value labels if appropriate G. temp.d_C Description: Water column temperature from deployment trip. Value labels if appropriate H. temp.r_C Description: Water column temperature from retrieval trip. Value labels if appropriate I. k(0.5d) Description: Extinction Coefficient (Kd) calculated from 0.5m on deployment trip. Value labels if appropriate J. k(1d) Description: Extinction Coefficient (Kd) calculated from 1m on deployment trip. Value labels if appropriate K. k(0.5r) Description: Extinction Coefficient (Kd) calculated from 0.5m on retrieval trip. Value labels if appropriate L. k(1r) Description: Extinction Coefficient (Kd) calculated from 1m on retrieval trip. Value labels if appropriate M. SRP.d_microg/L Description: Water column SRP (μg/L) from deployment trip Value labels if appropriate N. SRP.r1_microg/L Description: First rep of water column SRP (μg/L) from retrieval trip. Value labels if appropriate O. SRP.r2_microg/L Description: Second rep of water column SRP (μg/L) from retrieval trip. Value labels if appropriate P. NO3.d_microg/L Description: Water column NO3- (μg/L) from deployment trip. Value labels if appropriate Q. NO3.r1_microg/L Description: First rep of water column NO3- (μg/L) from retrieval trip. Value labels if appropriate R. NO3.r2_microg/L Description: Second rep of water column NO3- (μg/L) from retrieval trip. Value labels if appropriate S. TP.r1_microg/L Description: First rep of water column TP (μg/L) from retrieval trip. Value labels if appropriate T. TP.r2_microg/L Description: Second rep of water column TP (μg/L) from retrieval trip. Value labels if appropriate U. TP.d1_microg/L Description: First rep of water column TP (μg/L) from deployment trip. Value labels if appropriate V. TP.d2_microg/L Description: Second rep of water column TP (μg/L) from deployment trip. Value labels if appropriate W. TN.r1_microg/L Description: First rep of water column TN (μg/L) from retrieval trip. Value labels if appropriate X. TN.r2_microg/L Description: Second rep of water column TN (μg/L) from retrieval trip. Value labels if appropriate Y. TN.d_microg/L Description: Water column TN (μg/L) from deployment trip. Value labels if appropriate Z. chl.r_(microg/L) Description: Water column chlorophyll-a (μg/L) from retrieval trip. Value labels if appropriate AA. chl.d_ (microg/L) Description: Water column chlorophyll-a (μg/L) from deployment trip. Value labels if appropriate