EN

Banksia densa

Declining

Overview

A member of the Proteaceae family, this shrub species is characterised by the stiff, often serrated foliage and dense cylindrical or dome-shaped flower spikes typical of the genus Banksia. These inflorescences, composed of hundreds of small individual flowers, produce copious nectar that supports a range of pollinators, including birds, mammals, and insects, making the species a contributor to local pollination networks. Following flowering, woody seed-bearing follicles develop, with many Banksia species relying on fire to trigger seed release, an adaptation to Australia's fire-prone landscapes.

Banksia densa is endemic to Australia, where it grows within forest and shrubland ecosystems, typically in nutrient-poor, well-drained soils characteristic of these plant communities.

The species is classified as Endangered, with a decreasing population trend. Its principal threats stem from the expansion of annual and perennial non-timber crop agriculture, which results in habitat clearance and fragmentation. Additionally, the species faces ongoing pressure from problematic native species and disease, which may include pathogens such as Phytophthora cinnamomi, a root-rot organism known to affect many Proteaceae species in Australia by compromising root systems and causing plant death.

Conservation attention for threatened Banksia species generally includes habitat protection within reserves, monitoring of remaining populations, disease management protocols to limit the spread of soil-borne pathogens, and seed banking to preserve genetic material for potential restoration efforts.

Given the continuing conversion of habitat for agricultural use and the persistent threat of disease affecting root systems, the species' population trajectory remains negative. Without sustained habitat protection and disease control, its conservation status is unlikely to improve in the near term.

Banksia densa is threatened by land being cleared or converted for growing crops, which reduces its natural habitat, as well as by ongoing problems from native species (such as pests, pathogens, or diseases) that can damage or kill plants. Both of these pressures are currently listed as ongoing rather than emerging or historical. Based on the available information, these threats appear to be stable rather than clearly worsening or improving.

Threat summary

Habitat

Forest· majorShrubland· major

Conservation measures underway

Site/area protectionSite/area management

Frequently asked questions

Why is Banksia densa classified as Endangered?
Banksia densa is classified as Endangered — facing a very high risk of extinction in the wild — because population numbers are declining steeply and key habitats are under sustained pressure. Banksia densa is threatened by land being cleared or converted for growing crops, which reduces its natural habitat, as well as by ongoing problems from native species (such as pests, pathogens, or diseases) that can damage or kill plants. Both of these pressures are currently listed as ongoing rather than emerging or historical. Based on the available information, these threats appear to be stable rather than clearly worsening or improving.
Where does Banksia densa live?
Banksia densa 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 Banksia densa?
The main threats to Banksia densa are 2.1, and 8.2. The full IUCN-classified threat record for this species is detailed on the species page.

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