-------------------
GENERAL INFORMATION
------------------

Date: 2020-08-26
Authors: Thomas Lake (lakex055@umn.edu)
	 Ryan Briscoe Runquist (rbriscoe@umn.edu)
	 David Moeller (moeller@umn.edu)

Contents: Data for Species Distribution Models of Seven Invasive Plant Species in North America

Data: DRYAD

Date of data collection: 2016-01-01 to 2020-08-01

Funding Sources: Minnesota Invasive Terrestrial Plants and Pests Center (MITPPC)

---------------------
DATA & FILE OVERVIEW
---------------------

DRYAD repository contains 42 model projection TIF files (.tif) and 1 model selection matrix (.csv) file.
The 42 model projection files were derived from six MAXENT models constructed with species coordinates for seven invasive plant species, totaling 42 TIF files.
The model selection matrix was contains 43 rows (1 header row and 42 rows for each of the model projection statistics).

--------------------------
METHODOLOGICAL INFORMATION
--------------------------
#MAXENT Model Data
Name: MaxEnt software for modeling species niches and distributions
Source: https://biodiversityinformatics.amnh.org/open_source/maxent/
Version: 3.4.1

----------------------------
DATA-SPECIFIC INFORMATION  
----------------------------

##### Species Coordinates

Dataset: Species Longitude, Latitude Coordinate Pairs
Sources: 

EDDMapS. 2019. Early Detection & Distribution Mapping System. The University of Georgia - Center for Invasive Species and Ecosystem Health. Available online at http://www.eddmaps.org/; last accessed August 1, 2020.

Global Biodiversity Information Facility (GBIF) Online Database
**The spreadsheets downloaded from GBIF were processed to remove observations with high levels of uncertainty prior to modeling 

Dalmatian Toadflax
GBIF.org (21 June 2016) GBIF Occurrence Download. https://doi.org/10.15468/dl.aksyj6

Brown Knapweed
GBIF.org (13 July 2016) GBIF Occurrence Download. https://doi.org/10.15468/dl.mfyuk1

Common Teasel
GBIF.org (23 January 2019) GBIF Occurrence Download. https://doi.org/10.15468/dl.cavtwt

Black Swallowwort
GBIF.org (23 January 2019) GBIF Occurrence Download. https://doi.org/10.15468/dl.fu9wnd

Wild Parsnip
GBIF.org (23 January 2019) GBIF Occurrence Download. https://doi.org/10.15468/dl.cckfvg

Common Tansy
GBIF.org (24 January 2019) GBIF Occurrence Download. https://doi.org/10.15468/dl.e5owy4

Leafy Spurge
GBIF.org (10 June 2020) GBIF Occurrence Download. https://doi.org/10.15468/dl.fsv8ww


##### Model Projection TIF files

Dataset: 42 TIF (.tif) files of model projections for modelled species.

File Name: species_[speciesname]_gdk_[lambda]_ds_[dsvalue]_method_block_model_output.tif

Notes:

speciesname refers to name of modelled species, either toadflax, knapweed, teasel, swallowwrot, parsnip, tansy, or spurge.
lambda refers to lambda value for GKD, either 0, 1, or 3.
dsvalue refers to amount of downsampling, either 1km or 20km.


##### Model Selection Matrix

Dataset: Model_Selection_Matrix.csv

Variables

Species: species name
Occurrence Downsampling: Degree of downsampling of species coordinates. Levels are either Twenty (20km) or One (1km) downsampling.
GKD Background Lambda: Lambda value used to create the GKD background layer. Levels include Three (Lambda=3), One (Lambda=1), or Zero (Lambda=0/No GKD).
AUC: Mean cross-validated area under the curve.
Partial ROC Ratio: Mean cross-validated partial AUC ratio.
Continuous Boyce Index: mean cross-validated continuous boyce index.
Sensitivity: mean cross-validated sensitivity.
AUC Coefficient of Variation: Area under the curve coefficient of variation for a model.
Sensitivity Coefficient of Variation: Sensitivity coefficient of variation for a model.
AICc Value: Akaike information criterion corrected value.
Number of Model Parameters: Number of MAXENT model parameters associated with model.