WLAC

Ecological code repository for West Los Angeles College.

The following instructions are for getting the data needed to run the species distribution modeling script Marine_SDM.R.

To install R and R Studio

Following the tutorial here: R and R Studio tutorial.

Getting biological data

Go to https://www.gbif.org/occurrence/search

Set query filters

Occurrence status: present

Scientific name: Macrocystis pyrifera . Note: Giant kelp, test example

Location: including coordinates

Administrative area: California

Time: 2010 - 2020

A download link will be generated. The output file will be a tab-delimited CSV file.

Example output file for Macrocystis pyrifera: macrocystis_pyrifera.csv

Defining the study area

Got to download the shapefile for 3-Nautical Mile Coastal Boundary, California, 2001.

Relevant shapefile data is initially in the directory sg211gq3741/data_EPSG_4326 , move it to the same directory as the script.

Within Marine_SDM.R clip the coastal boundary zone of California to the extent of the Southnern California Bight. Northwestern point of study area is Point Conception (34.4486° N, 120.4716° W), southeastern point is Tijuana Beach Promenade (32.5340° N, 117.1235° W)

Get environmental data

Go to the Bio-Oracle download page.

Download mean layers from 2010-2020