10.5061/DRYAD.H81S5
Hefley, Trevor J.
University of Nebraska - Lincoln
Baasch, David M.
University of Nebraska - Lincoln
Tyre, Andrew J.
University of Nebraska - Lincoln
Blankenship, Erin E.
University of Nebraska - Lincoln
Data from: Correction of location errors for presence-only species
distribution models
Dryad
dataset
2014
opportunistic sightings
Measurement error
Grus americana
regression calibration
2000-2012
Public Land Survey System
location errors
inhomogeneous Poisson point process
2014-11-07T00:00:00Z
2014-11-07T00:00:00Z
en
https://doi.org/10.1111/2041-210X.12144
1843522 bytes
1
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
1. Species distribution models (SDMs) for presence-only data depend on
accurate and precise measurements of geographic and environmental
covariates that influence presence and abundance of the species. Some data
sets, however, may contain both systematic and random errors in the
recorded location of the species. Environmental covariates at the recorded
location may differ from those at the true location and result in biased
parameter estimates and predictions from SDMs. 2. Regression calibration
is a well-developed statistical method that can be used to correct the
bias in estimated coefficients and predictions from SDMs when the recorded
geographic location differ from the true location for some, but not all
locations. We expand the application of regression calibration methods to
SDMs and provide illustrative examples using simulated data and
opportunistic records of whooping cranes (Grus americana). 3. We found we
were able to successfully correct the bias in our SDM parameters estimated
from simulated data and opportunistic records of whooping cranes using
regression calibration. 4. When modeling species distributions with data
that have geographic location errors, we recommend researchers consider
the effect of location errors. Correcting for location errors requires
that at least a portion of the data have locations recorded without error.
Bias correction can result in an increase in variance; this increase in
variance should be considered when evaluating the utility of bias
correction.
Exact 100mThe file ‘Exact 100m.csv’ includes environmental covariates
calculated within a 100 m radius buffer around the 32 whooping crane group
locations obtained with a global positioning system as well as within a
100 m radius buffer around the 10,000 Monte Carlo integration points used
in the analysis. The column ‘presence.location’ indicates if the
covariates are associated with a location of a whooping crane group (yes)
or a Monte Carlo integration point (no). Columns ‘aquatic’ and
‘development’ represent the proportion of aquatic habitat and development
within a 100 m radius buffer around the whooping crane group locations and
the Monte Carlo integration points. Columns ‘aquatic.section’ and
‘development.section’ represent the proportion of aquatic habitat and
development within a 100 m radius buffer around whooping crane group
locations that were degraded in accuracy to the section level and the
Monte Carlo integration points. Columns ‘aquatic.small’ and
‘development.small’ represent the proportion of aquatic habitat and
development within a 100 m radius buffer around whooping crane group
locations that included a small degradation (σ = 100 m) in location
accuracy and the Monte Carlo integration points. Columns ‘aquatic.large’
and ‘development.large’ represent the proportion of aquatic habitat and
development within a 100 m radius buffer around whooping crane group
locations that included a large degradation (σ = 1000 m) in location
accuracy and the Monte Carlo integration points. The accuracies of the
10,000 Monte Carlo integration points were not degraded and thus the
proportion of aquatic habitat and development within the 100 m radius
buffers are the same across respective columns. Note: the same 10,000
Monte Carlo integration points were used in all analyses.Exact 250mThe
file ‘Exact 250m.csv’ includes environmental covariates calculated within
a 250 m radius buffer around the 32 whooping crane group locations
obtained with a global positioning system as well as within a 250 m radius
buffer around the 10,000 Monte Carlo integration points used in the
analysis. The column ‘presence.location’ indicates if the covariates are
associated with a location of a whooping crane group (yes) or a Monte
Carlo integration point (no). Columns ‘aquatic’ and ‘development’
represent the proportion of aquatic habitat and development within a 250 m
radius buffer around the whooping crane group locations and the Monte
Carlo integration points. Columns ‘aquatic.section’ and
‘development.section’ represent the proportion of aquatic habitat and
development within a 250 m radius buffer around whooping crane group
locations that were degraded in accuracy to the section level and the
Monte Carlo integration points. Columns ‘aquatic.small’ and
‘development.small’ represent the proportion of aquatic habitat and
development within a 250 m radius buffer around whooping crane group
locations that included a small degradation (σ = 100 m) in location
accuracy and the Monte Carlo integration points. Columns ‘aquatic.large’
and ‘development.large’ represent the proportion of aquatic habitat and
development within a 250 m radius buffer around whooping crane group
locations that included a large degradation (σ = 1000 m) in location
accuracy and the Monte Carlo integration points. The accuracies of the
10,000 Monte Carlo integration points were not degraded and thus the
proportion of aquatic habitat and development within the 250 m radius
buffers are the same across respective columns. Note: the same 10,000
Monte Carlo integration points were used in all analyses.Exact 500mThe
file ‘Exact 500m.csv’ includes environmental covariates calculated within
a 500 m radius buffer around the 32 whooping crane group locations
obtained with a global positioning system as well as within a 500 m radius
buffer around the 10,000 Monte Carlo integration points used in the
analysis. The column ‘presence.location’ indicates if the covariates are
associated with a location of a whooping crane group (yes) or a Monte
Carlo integration point (no). Columns ‘aquatic’ and ‘development’
represent the proportion of aquatic habitat and development within a 500 m
radius buffer around the whooping crane group locations and the Monte
Carlo integration points. Columns ‘aquatic.section’ and
‘development.section’ represent the proportion of aquatic habitat and
development within a 500 m radius buffer around whooping crane group
locations that were degraded in accuracy to the section level and the
Monte Carlo integration points. Columns ‘aquatic.small’ and
‘development.small’ represent the proportion of aquatic habitat and
development within a 500 m radius buffer around whooping crane group
locations that included a small degradation (σ = 100 m) in location
accuracy and the Monte Carlo integration points. Columns ‘aquatic.large’
and ‘development.large’ represent the proportion of aquatic habitat and
development within a 500 m radius buffer around whooping crane group
locations that included a large degradation (σ = 1000 m) in location
accuracy and the Monte Carlo integration points. The accuracies of the
10,000 Monte Carlo integration points were not degraded and thus the
proportion of aquatic habitat and development within the 500 m radius
buffers are the same across respective columns. Note: the same 10,000
Monte Carlo integration points were used in all analyses.Full 100mThe file
‘Full 100m.csv’ includes environmental covariates calculated within a 100
m radius buffer around the 32 whooping crane group locations obtained with
a global positioning system, the 36 locations that were recorded as the
center the Public Land Survey System section, and the 10,000 Monte Carlo
integration points. The column ‘presence.location’ indicates if the
covariates are associated with a location of a whooping crane group (yes)
or a Monte Carlo integration point (no). Columns ‘aquatic’ and
‘development’ represent the proportion of aquatic habitat and development
within a 100 m radius buffer around whooping crane group locations and
Monte Carlo integration points. The column ‘accuracy’ indicates if the
location was recorded as the center of a Public Land Survey System section
(section) or if the location was recorded with a global positioning system
(gps). The location of the 10,000 Monte Carlo integration points were
recorded without error and therefore the ‘accuracy’ is recorded as exact.
Note: the same 10,000 Monte Carlo integration points were used in all
analyses.Full 250mThe file ‘Full 250m.csv’ includes environmental
covariates calculated within a 250 m radius buffer around the 32 whooping
crane group locations obtained with a global positioning system, the 36
locations that were recorded as the center the Public Land Survey System
section, and the 10,000 Monte Carlo integration points. The column
‘presence.location’ indicates if the covariates are associated with a
location of a whooping crane group (yes) or a Monte Carlo integration
point (no). Columns ‘aquatic’ and ‘development’ represent the proportion
of aquatic habitat and development within a 250 m radius buffer around
whooping crane group locations and Monte Carlo integration points. The
column ‘accuracy’ indicates if the location was recorded as the center of
a Public Land Survey System section (section) or if the location was
recorded with a global positioning system (gps). The location of the
10,000 Monte Carlo integration points were recorded without error and
therefore the ‘accuracy’ is recorded as exact. Note: the same 10,000 Monte
Carlo integration points were used in all analyses.Full 500mThe file ‘Full
500m.csv’ includes environmental covariates calculated within a 500 m
radius buffer around the 32 whooping crane group locations obtained with a
global positioning system, the 36 locations that were recorded as the
center the Public Land Survey System section, and the 10,000 Monte Carlo
integration points. The column ‘presence.location’ indicates if the
covariates are associated with a location of a whooping crane group (yes)
or a Monte Carlo integration point (no). Columns ‘aquatic’ and
‘development’ represent the proportion of aquatic habitat and development
within a 500 m radius buffer around whooping crane group locations and
Monte Carlo integration points. The column ‘accuracy’ indicates if the
location was recorded as the center of a Public Land Survey System section
(section) or if the location was recorded with a global positioning system
(gps). The location of the 10,000 Monte Carlo integration points were
recorded without error and therefore the ‘accuracy’ is recorded as exact.
Note: the same 10,000 Monte Carlo integration points were used in all
analyses.Whooping crane location dataThe file ‘Whooping crane location
data.csv’ contains 68 whooping crane group locations that were obtained
opportunistically in Nebraska, USA from 2000‒2012. The file contains
latitude, longitude, and accuracy of each location. The column ‘accuracy’
indicates if the location was recorded as the center of a Public Land
Survey System section (section) or if the location was recorded with a
global positioning system (gps).
USA
Nebraska