rl_systems: IUCN Red List ecological systems

In redlist: Interface to the IUCN Red List Data

IUCN Red List ecological systems

Description

Retrieve species assessments based on their ecological systems. If code = NULL, it returns a list of available ecological systems. If code is provided, it retrieves assessments for species in the specified system(s).

Usage

rl_systems(
  code = NULL,
  year_published = NULL,
  latest = NULL,
  possibly_extinct = NULL,
  possibly_extinct_in_the_wild = NULL,
  scope_code = NULL,
  page = 1
)

Arguments

code	Character or Numeric. One or more system codes (e.g., "0", "1", "2"). Use rl_systems() to list available ecological systems.
year_published	Optional. Single or numeric vector of years to filter assessments by publication year.
latest	Optional. Logical. If TRUE, return only the latest assessment per species.
possibly_extinct	Optional. Logical. Filter for species flagged as possibly extinct.
possibly_extinct_in_the_wild	Optional. Logical. Filter for species possibly extinct in the wild.
scope_code	Optional. Integer One or more scope codes to filter assessments.
page	Optional. Integer vector. Specify one or more page numbers to fetch. If NULL or NA, all pages will be fetched automatically.

Value

A tibble (class tbl_df, tbl, data.frame) where each column represents a unique API response JSON key. If code = NULL, the tibble contains available ecological systems with columns such as code and description. If code is provided, the tibble contains assessment data for the specified system(s), including description, possible extinct in the wild, scientific name, latest, taxon details, and other relevant metadata.

Examples

## Not run: 
# List all ecological systems
rl_systems()

# Get terrestrial species assessments (code 0)
rl_systems(code = 0)

# Get marine species assessments published since 2021
rl_systems(
  code = "2",
  year_published = 2021:2023
)

## End(Not run)

redlist documentation built on Aug. 21, 2025, 5:39 p.m.