Distribution models of microbial mats and mosses across Fryxell Basin, Taylor Valley, Antarctica (2018-2019)

Summary

Abstract: 

Long-term ecological field surveys from the McMurdo Dry Valleys Long Term Ecological Research program (MCM LTER) have documented the abundance and diversity of microbial mat types across ephemeral glacial meltwater streams in the McMurdo Dry Valleys region of Antarctica. However, field surveys are limited and are incapable of being performed across the entirety of streams within a field season. Therefore, we used remote sensing to examine the distribution of these diverse communities across streams in order to determine whether large scale distribution patterns are similar to those the MCM LTER has already thoroughly studied in situ. As part of our 2018-2019 field campaign, we established two to three 20 x 20 m plots within five different streams (Bowles Creek, McKnight Creek, a relict channel, Canada Stream, and Crescent Stream) in the Fryxell Basin of Taylor Valley. We performed point transect and quadrat field surveys of microbial mat and moss cover within each 20 x 20 m plot. We then used hyperspectral measurements of mat and moss collected in the field, previously archived in “Spectral and biological characteristics of microbial mats and mosses across Fryxell Basin, Taylor Valley, Antarctica (2018-2019),” in linear spectral mixing models to determine mat and moss coverage in the same 20 x 20 m plots within an atmospherically corrected WorldView-2 satellite image from Dec. 12, 2018. We ground truthed our modeled mat and moss abundances with our field survey coverages and determined the limitations of our methods. We then modeled mat and moss coverage across Huey Creek and Von Guerard Stream to apply our methods to streams without ground truthing measurements. Our results demonstrate the spatial distribution of moss and black, orange, red, and green microbial mat across Fryxell Basin streams. Observations of mat and moss coverage at the basin-wide scale are similar to those seen in localized stream areas.

Date Range: 

December 6, 2018 to January 25, 2019
Data Citation
Borges, S.R., Salvatore, M.R., Stanish, L.F., Power, S.N., Sokol, E.R., Barrett, J.E., Tai Udovicic, C.J. 2023. Distribution models of microbial mats and mosses across Fryxell Basin, Taylor Valley, Antarctica (2018-2019). Environmental Data Initiative. DOI: 10.6073/pasta/de796f76bc4aa7cbff001733805adf72. Dataset accessed 20 June 2024.
Dataset(s)

Description: 

Total areal and percent coverage for models.

Variables (click to expand): 

dataset_code
  • Label: Dataset code
  • Definition: Internal dataset code.
  • Type: Nominal
  • Missing values: None specified
model_id
  • Label: Model ID
  • Definition: Unique model identifier that corresponds with the name of the model and field survey measurements being compared.
  • Type: Nominal
  • Missing values: None specified
stream_name
  • Label: Stream name
  • Definition: Name of the stream associated with the model.
  • Type: Nominal
  • Missing values: None specified
model_number
  • Label: Model number
  • Definition: Model run identifier.
  • Type: Nominal
  • Missing values: None specified
sample_type
  • Label: Sample type
  • Definition: Sample type (i.e., microbial mat type by color, moss, soil).
  • Type: Nominal
  • Missing values: None specified
moisture_content
  • Label: Moisture content
  • Definition: Sample coverage type, roughly corresponding with moisture content (i.e., dry, inundated, wet, total).
  • Type: Nominal
  • Missing values: None specified
areal_coverage_m2
  • Label: Areal coverage
  • Definition: Areal coverage of mat and/or moss for the associated model and stream.
  • Type: Physical quantity
  • Unit: meterSquared
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
percent_coverage
  • Label: Percent coverage
  • Definition: Percent coverage of mat and/or moss for the associated model and stream.
  • Type: Physical quantity
  • Unit: percent
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified

Description: 

Measured vs. modeled percent coverage.

Variables (click to expand): 

dataset_code
  • Label: Dataset code
  • Definition: Internal dataset code.
  • Type: Nominal
  • Missing values: None specified
model_id
  • Label: Model ID
  • Definition: Unique model identifier that corresponds with the name of the model and field survey measurements being compared.
  • Type: Nominal
  • Missing values: None specified
stream_name
  • Label: Stream name
  • Definition: Name of the stream associated with the field measurement or model.
  • Type: Nominal
  • Missing values: None specified
plot_id
  • Label: Plot ID
  • Definition: Plot identifier within the stream where the field measurement was taken. See methods for further details.
  • Type: Nominal
  • Missing values: None specified
data_type
  • Label: Data type
  • Definition: Data type, either field measurement (i.e., point transect or quadrat) or model. See methods for further details.
  • Type: Nominal
  • Missing values: None specified
model_number
  • Label: Model number
  • Definition: Model run identifier.
  • Type: Nominal
  • Missing values: None specified
sample_type
  • Label: Sample type
  • Definition: Sample type (i.e., microbial mat type by color, moss, soil).
  • Type: Nominal
  • Missing values: None specified
moisture_content
  • Label: Moisture content
  • Definition: Sample coverage type, roughly corresponding with moisture content (i.e., dry, inundated, wet, total).
  • Type: Nominal
  • Missing values: None specified
percent_coverage
  • Label: Percent coverage
  • Definition: Percent coverage of mat and/or moss for the associated stream, plot number, and data type.
  • Type: Physical quantity
  • Unit: percent
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified

Description: 

Measured vs. modeled spectral reflectance.

Variables (click to expand): 

dataset_code
  • Label: Dataset code
  • Definition: Internal dataset code.
  • Type: Nominal
  • Missing values: None specified
model_id
  • Label: Model ID
  • Definition: Unique model identifier that corresponds with the name of the model and field survey measurements being compared.
  • Type: Nominal
  • Missing values: None specified
stream_name
  • Label: Stream name
  • Definition: Name of the stream associated with the field measurement or model.
  • Type: Nominal
  • Missing values: None specified
plot_id
  • Label: Plot ID
  • Definition: Plot identifier within the stream where the field measurement was taken. See methods for further details.
  • Type: Nominal
  • Missing values: None specified
data_type
  • Label: Data type
  • Definition: Data type, either field measurement (i.e., point transect or quadrat) or model. See methods for further details.
  • Type: Nominal
  • Missing values: None specified
model_number
  • Label: Model number
  • Definition: Model run identifier.
  • Type: Nominal
  • Missing values: None specified
band_um
  • Label: Band
  • Definition: Wavelength of reflectance corresponding with bands from the WorldView-2 satellite: 0.427 um, 0.482 um, 0.546 um, 0.608 um, 0.659 um, 0.724 um, 0.831 um, and 0.908 um.
  • Type: Physical quantity
  • Unit: micrometer
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
reflectance
  • Label: Reflectance
  • Definition: Reflectance values (unitless) associated with each band and measurement/model.
  • Type: Nominal
  • Missing values: None specified

Description: 

Measured vs. model statistics.

Variables (click to expand): 

dataset_code
  • Label: Dataset code
  • Definition: Internal dataset code.
  • Type: Nominal
  • Missing values: None specified
model_id
  • Label: Model ID
  • Definition: Unique model identifier that corresponds with the name of the model and field survey measurements being compared.
  • Type: Nominal
  • Missing values: None specified
stream_name
  • Label: Stream name
  • Definition: Name of the stream associated with the field measurement or model.
  • Type: Nominal
  • Missing values: None specified
plot_id
  • Label: Plot ID
  • Definition: Plot identifier within the stream where the field measurement was taken. See methods for further details.
  • Type: Nominal
  • Missing values: None specified
field_survey_type
  • Label: Field survey type
  • Definition: Type of field measurement (i.e., point transect or quadrat).
  • Type: Nominal
  • Missing values: None specified
model_number
  • Label: Model number
  • Definition: Model run identifier.
  • Type: Nominal
  • Missing values: None specified
regression_slope
  • Label: Regression slope
  • Definition: Regression slope calculated between the modeled and measured abundances of mat and moss.
  • Type: Nominal
  • Missing values: None specified
regression_intercept
  • Label: Regression intercept
  • Definition: Regression intercept calculated between the modeled and measured abundances of mat and moss.
  • Type: Nominal
  • Missing values: None specified
regression_r2
  • Label: Regression R2
  • Definition: Regression R2 value calculated between the modeled and measured abundances of mat and moss.
  • Type: Nominal
  • Missing values: None specified
regression_pvalue
  • Label: Regression p-value
  • Definition: Regression p-value calculated between the modeled and measured abundances of mat and moss.
  • Type: Nominal
  • Missing values: None specified
rmse
  • Label: Root mean square error
  • Definition: Regression root mean square error (RMSE) calculated between the modeled and measured abundances of mat and moss.
  • Type: Nominal
  • Missing values: None specified
aic
  • Label: Akaike Information Criterion
  • Definition: Akaike Information Criterion (AIC) value calculated between the modeled and measured abundances of mat and moss.
  • Type: Nominal
  • Missing values: None specified
reduced_chi_squared
  • Label: Reduced chi squared
  • Definition: Reduced chi-squared value calculated between the modeled and measured abundances of mat and moss.
  • Type: Nominal
  • Missing values: None specified

Description: 

Davinci and python scripts specific to the manuscript associated with this data package, detailing the linear unmixing model methods used to retrieve data from the “mvmspectra” and “mvmpctcov” files. This zip file also includes the multispectral data in their original format for the python script.

File: 

Short name: 

b235_model

Dataset ID: 

5501