wind_cleared {GenEst}

Wind cleared plot (60m) Search Example

Description

A complete example data set for estimating fatalities from 60 m cleared plots at 23 out of 100 searches at a wind power facility. Data on carcass observations (CO) from a search of all terrain out to 60m from each of 100 turbines at a theoretical site, field trials for estimating carcass persistence (CP) and searcher efficiency (SE), search schedule (SS) parameters (for example, which turbines were searched on which days), and density weighted proportion (DWP) of area searched at each turbine (which is an area adjustment factor to account for incomplete search coverage).

Usage

wind_cleared

Format

wind_cleared is a list with 5 elements:

SE

Searcher efficiency trial data

CP

Carcass persistence trial data

SS

Search schedule parameters

DWP

Density weighted proportion of area searched

CO

Carcass observations

Searcher Efficiency (SE)

$SE is a data frame with each row representing the fate of a single carcass in the searcher efficiency trials. There are columns for:

pkID

unique ID for each carcass

Size

"bat"; or "lrg", "med", or "sml" bird

Season

"spring", "summer", or "fall"

Visibility

indicator for visibility class of the ground, with "RP" for carcasses placed on a road or turbine pad, "M" for moderate visibility (e.g., plowed field; short, sparse vegetation), or "D" for difficult visibility

"s1",...,"s5"

fate of carcass on the 1st, 2nd, 3rd, 4th, and 5th search after placement. A value of 1 implies that a carcass was discovered by searchers, 0 implies the carcass was present but not discovered, and any other value is interpreted as "no search" or "carcass not present" and ignored in the model. In this data set, NA indicates that a carcass had been previously discovered and removed from the field. A user may use a variety of values to differentiate different reasons no search was conducted or the carcass was not present. For example, "SN" could be used to indicate that the turbine was not searched because of snow, or "NS" to indicate the search was not scheduled in that location at that time, or "SC" to indicate the carcass had been removed by scavengers prior to the search.

Carcass Persistence (CP)

$CP is a data frame with each row representing the fate of a single carcass in the carcass persistence trials. There are columns for:

cpID

unique ID for each carcass

Size

"bat"; or "lrg", "med", or "sml" bird

Season

"spring", "summer", or "fall"

Visibility

indicator for visibility class of the ground, with "RP" for carcasses placed on a road or turbine pad, "M" for moderate visibility (e.g., plowed field; short, sparse vegetation), or "D" for difficult visibility.

LastPresent, FirstAbsent

endpoints of the interval bracketing the time the carcass was scavenged or otherwise removed from the field. For example, LastPresent = 2.04, FirstAbsent = 3.21 indicates that the carcass was last observed 2.04 days after being placed in the field and was noted missing 3.21 days after being placed. If the precise time of carcass removal is known (e.g., recorded by camera), then LastPresent and FirstAbsent should be set equal to each other. If a carcass persists beyond the last day of the field trial, LastPresent is the last time it was observed and FirstAbsent is entered as Inf or NA.

Search Schedule (SS)

$SS is a data frame with a row for each date a turbine at the site was searched, a column of SearchDates, and a column for each turbine. In addition, there is a column to indicate the Season. A column with search dates and columns for each turbine searched are required. Other columns are optional.

SearchDate

columns of dates on which at least one turbine was searched. Format in this data is "%Y-%m-%d CDT", but time zone (CDT) is optional. A time stamp may be included if desired (e.g., 2018-03-20 02:15:41). Alternatively, \ can be used in place of -.

Season

"spring", "summer", or "fall" to indicate which season the search was conducted in. Season is optional but may be used as a temporal covariate for fatality estimates.

t1, etc.

unique ID for all turbines that were searched on at least one search date. Values are either 1 or 0, indicating whether the given turbine (column) was searched or not on the given date (row).

Density Weighted Proportion (DWP)

$DWP is a data frame with a row for each turbine and columns for each carcass size class. Values represent the density-weighted proportion of the searched area for each size (or the fraction of carcasses that fall in the searched area).

Turbine

unique ID for each turbine. IDs match those used in the $CO data frame and the column names in the $SS data.

Size

bat, sml, med, lrg

Season

"spring", "summer", or "fall" to indicate which season the search was conducted in. Season is optional but may be used as a temporal covariate for fatality estimates.

Carcass Observations (CO)

$CO is a data frame with a row for carcass observed in the carcass searches and a number of columns giving information about the given carcass (date found, size, species, etc.)

carcID

unique identifier for each carcass: "x30", "x46", etc.

Turbine

identifier for which turbine the given carcass was found at: "t19", "t65", "t49", etc.

TurbineType

the type of turbine: "X", "Y" or "Z".

DateFound

dates entered in the same format as in $SS$SearchDate. Every date entered here is (and must be) included in the search schedule ($SS$SearchDate)

Visibility

visibility class: "RP", "M", or "D", as described in $CP and $SE

Species

species of the carcass: "BA", "BB", "BC", "BD", "BE", "LA", "LB", "LD", "LE", "MA", "MB", "SA", "SB", "SC", "SD", "SE", "SF", "SG"

SpeciesGroup

species group: "bat0", "bat1", "brd1", "brd2", "brd3"

Size

size: "bat", "lrg", "med", "sml"

Distance

distance from the turbine

Source

wind_cleared