VU

Grevillea incrassata

Stable

Overview

Grevillea incrassata is a woody shrub belonging to the Proteaceae family, a lineage known for its distinctive flower clusters and adaptations to nutrient-poor soils. Like many members of its genus, it likely produces clusters of nectar-rich flowers that attract birds and insects, contributing to pollination networks within its native shrubland habitat. Its thickened plant structures, suggested by its species name, may aid in water retention or resistance to environmental stress, common traits among Grevillea species adapted to Australia's variable climate.

This species is endemic to Australia, where it occupies shrubland ecosystems. Its distribution is tied to specific soil and climatic conditions typical of these habitats, and its range appears to be relatively restricted, contributing to its Vulnerable classification under the IUCN Red List.

The species faces several ongoing pressures. Roads and railroads fragment its habitat and can directly destroy plant populations during construction and maintenance. Invasive non-native species and diseases pose competitive and pathogenic threats, potentially displacing native vegetation or introducing harmful pathogens that affect plant health and reproduction.

Additionally, the expansion of annual and perennial non-timber crop agriculture continues to encroach on and convert natural shrubland habitat, reducing available habitat.

Conservation measures for this species likely include habitat protection within reserves, monitoring of population trends, and management of invasive species where feasible, consistent with broader conservation strategies applied to threatened Australian flora.

Despite the ongoing threats, the population trend for Grevillea incrassata is currently assessed as stable. This suggests that existing pressures, while persistent, have not yet resulted in significant population decline. Continued habitat protection and management of invasive species and land-use pressures will be important for maintaining this stability over the longer term.

Grevillea incrassata is mainly threatened by the clearing and disturbance of its habitat from road and railway construction, competition from invasive plants or animals and diseases, and the conversion of land to farming for annual and perennial crops. These pressures are all currently active and continuing. Based on the ongoing nature of all three threats, the overall situation appears to be stable to slowly intensifying rather than decreasing.

Threat summary

Habitat

Shrubland· major

Conservation measures underway

Species recovery

Frequently asked questions

Why is Grevillea incrassata classified as Vulnerable?
Grevillea incrassata is classified as Vulnerable because the population is declining and the species faces a high risk of extinction in the medium-term future if current pressures continue. Grevillea incrassata is mainly threatened by the clearing and disturbance of its habitat from road and railway construction, competition from invasive plants or animals and diseases, and the conversion of land to farming for annual and perennial crops. These pressures are all currently active and continuing. Based on the ongoing nature of all three threats, the overall situation appears to be stable to slowly intensifying rather than decreasing.
Where does Grevillea incrassata live?
Grevillea incrassata occurs in Australia. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Grevillea incrassata?
The main threats to Grevillea incrassata are 2.1, 4.1, and 8.1. The full IUCN-classified threat record for this species is detailed on the species page.

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