MOSSobs: Data on heavy metals in mosses near a mining road in Alaska,...

In jayverhoef/ZVHdata: Data Sets for Spatial Linear Models for Environmental Data

Data on heavy metals in mosses near a mining road in Alaska, USA

Description

Data on heavy metal concentrations in mosses near a mining road in Alaska, USA with object type SpatialPointsDataFrame from sp package. Data on three metals: 1) Cd (cadmium), 2) Pb (lead), and 3) Zn (zinc) are included, along with covariates that have relationships to heavy metal concentrations.

Usage

data(MOSSobs)

Format

A sf object. The projection is in Alaska Albers, EPSG:3338. The dataframe has 365 observations and 11 variables.

sample

A factor variable with location identifier. Some samples were duplicated in the field, and replicated in the lab, so there are 318 unique spatial locations

lon

Longitude, in decimal degrees

lat

Latitude, in decimal degrees

dist2road

Distance to haul road, in meters

sideroad

A factor variable with two levels: "N" for north of the haul road, and "S" for south of the haul road

field_dup

Integer for any field duplicate samples. All locations start with 1, and any additional samples continue with integers 2, ...

lab_rep

Integer for any replicated samples for laboratory analysis, where the sample was split and a separate laboratory analysis was performed. All analyses start with 1, and any additional analyses continue with integers 2, ...

Cd

Cadmium concentration in moss tissue, in mg/kg

Pb

Lead concentration in moss tissue, in mg/kg

Zn

Zinc concentration in moss tissue, in mg/kg

year

year of data collection, either 2001 or 2006

Source

Data obtained from Peter Neitlich and Linda Hasselbach of the National Park Service. Data were used in the publications listed below.

The code that creates the data file from the raw data can be found at system.file("raw data/MossHeavyMetals/create_MOSSobs.R",package = "ZVHdata"). It was subsequently converted to sf using st_as_sf function.

References

Neitlich, P.N., Ver Hoef, J.M., Berryman, S. D., Mines, A., Geiser, L.H., Hasselbach, L.M., and Shiel, A. E. 2017. Trends in Spatial Patterns of Heavy Metal Deposition on National Park Service Lands Along the Red Dog Mine Haul Road, Alaska, 2001-2006. PLOS ONE 12(5):e0177936 DOI:10.1371/journal.pone.0177936 (link to: Trends in Spatial Patterns of Heavy Metal Deposition on National Park Service Lands Along the Red Dog Mine Haul Road, Alaska, 2001-2006.)



Hasselbach, L., Ver Hoef, J.M., Ford, J., Neitlich, P., Berryman, S., Wolk B. and Bohle, T. 2005. Spatial Patterns of Cadmium, Lead and Zinc Deposition on National Park Service Lands in the Vicinity of Red Dog Mine, Alaska. Science of the Total Environment 348: 211-230. (link to: Spatial Patterns of Cadmium, Lead and Zinc Deposition on National Park Service Lands in the Vicinity of Red Dog Mine, Alaska.)

Examples

library(ZVHdata)
library(sf)
data(MOSSobs)
names(MOSSobs)
summary(MOSSobs)
data(CAKRboundary)
plot(CAKRboundary)
MOSSobs[,'lnPb'] = log(MOSSobs$Pb)
plot(MOSSobs[,'lnPb'], add = TRUE, pch = 19)

jayverhoef/ZVHdata documentation built on Oct. 22, 2022, 8:35 p.m.