Algal Nutrient Limitation Bioassays in Sycamore Creek, Arizona, USA (2010-2020)
Publication date: 2020-08-28
Bounding Coordinates:
Longitude:-111.507645 to -111.506849
Latitude:33.750482 to 33.749021
Bounding Coordinates:
Longitude:-111.510883 to -111.50779
Latitude:33.748620 to 33.74835
Arizona State University,Global Institute of Sustainability,Tempe
caplter.data@asu.edu
Author(s):
- Nancy Grimm, Arizona State University
- John Sabo, Arizona State University
- Sophia Bonjour, Arizona State University
- Xiaoli Dong, University of California, Davis
- Amalia Handler, USEPA National Health and Environmental Effects
- Katherine Kemmitt, Wenck
- Marina Lauck, Arizona State University
- Monica Palta, Pace University
- Lindsey Pollard, Arizona State University
Abstract:
The primary objective of this project is to understand how long-term climate variability and change influence the structure and function of desert streams via effects on hydrologic disturbance regimes. Climate and hydrology are intimately linked in arid landscapes; for this reason, desert streams are particularly well suited for both observing and understanding the consequences of climate variability and directional change. Researchers try to (1) determine how climate variability and change over multiple years influence stream biogeomorphic structure (i.e., prevalence and persistence of wetland and gravel-bed ecosystem states) via their influence on factors that control vegetation biomass, and (2) compare interannual variability in within-year successional patterns in ecosystem processes and community structure of primary producers and consumers of two contrasting reach types (wetland and gravel-bed stream reaches). This dataset addresses patterns of nutrient limitation by primary producers as indicated by *in situ* growth on artificial substrates.
Keywords:
phosphate, phosphorus, photosynthesis, nitrogen, nutrients, diatoms, phaeophytin, chlorophyll, chlorophyll a, algae, deserts, floods, aquatic ecosystems, disturbance, disturbance patterns, disturbance properties, disturbances, diversity, drainage, droughts, streams population studies, disturbance patterns, water and fluxes sycamore creek, sonoran desert, LTREB cap lter, cap, caplter, central arizona phoenix long term ecological research, arizona, az, arid land
Temporal Coverage:
2010-05-15 to 2020-05-21Geographic Coverage:
Geographic Description: gravel reach of the Dos S (SS) sampling site of Sycamore Creek in central Arizona, USABounding Coordinates:
Longitude:-111.507645 to -111.506849
Latitude:33.750482 to 33.749021
Geographic Coverage:
Geographic Description: wetland reach of the Dos S (SS) sampling site of Sycamore Creek in central Arizona, USABounding Coordinates:
Longitude:-111.510883 to -111.50779
Latitude:33.748620 to 33.74835
Contact:
Information Manager, Central Arizona–Phoenix LTER,Arizona State University,Global Institute of Sustainability,Tempe
caplter.data@asu.edu
Methods used in producing this dataset: Show
Data Files (1) :
Tabular: 590_nutrient_diffusing_substrata_fa70c9a52cdf9b19a09feb11ad21e93c.csv
Description: nutrient diffusion assays to assess nutrient limitation of primary producers in wetland and gravel sites of Sycamore Creek, AZ
| Column | Description | Type | Units |
|---|---|---|---|
| Date_retrieved | Date cups were recovered from field incubations |
date | Format: YYYY-MM-DD |
| Site | Location of field incubation |
string |
Enumeration:
|
| Days_in_field | Days of field incubation |
float | nominalDay |
| Treatment | Agar treatment used: Control- agar only, NO3- agar and sodium nitrate, PO4- agar and potasium phosphate monobasic, NO3+PO4- agar, sodium nitrate, and potasium phosphate monobasic. A cation study was done in 2015 and included sodium phosphate monobasic |
string |
Enumeration:
|
| Extract | Either ethanol or methanol was used |
string |
Enumeration:
|
| Extract_vol_ml | Volume of solvent (methanol) used in exctraction |
float | milliliter |
| ABS_750 | Background corrected absorbance measurement on spectrophotometer at wavelength 750 nm. Negative values were changed to zero |
float | nanometer |
| ABS_666 | Background corrected absorbance measurement on spectrophotometer at wavelength 666 nm, 665 nm was used for ethanol extractions |
float | nanometer |
| ABS_480 | Background corrected absorbance measurement on spectrophotometer at wavelength 480 nm |
float | nanometer |
| ABS_750a | Background corrected absorbance measurement on spectrophotometer at wavelength 750 nm after acidification. Negative values were changed to zero |
float | nanometer |
| ABS_666a | Background corrected absorbance measurement on spectrophotometer at wavelength 666 nm after acidification, 665 nm was used for ethanol extractions |
float | nanometer |
| Chl_mg/m2 | Concentration of chlorophyll a |
float | milligramsPerSquareMeter |
| Pheo_mg/m2 | Concentration of pheophytin a |
float | milligramsPerSquareMeter |
| Flags | notes or problems encountered |
string |
Enumeration:
|