Biodiversity

Species Profile and Threats Database


For information to assist proponents in referral, environmental assessments and compliance issues, refer to the Policy Statements and Guidelines (where available), the Conservation Advice (where available) or the Listing Advice (where available).
 
In addition, proponents and land managers should refer to the Recovery Plan (where available) or the Conservation Advice (where available) for recovery, mitigation and conservation information.

EPBC Act Listing Status Listed as Vulnerable as Boronia quadrilata
Recovery Plan Decision Recovery Plan required, this species had a recovery plan in force at the time the legislation provided for the Minister to decide whether or not to have a recovery plan (19/2/2007).
 
Adopted/Made Recovery Plans National recovery plan for Boronia quadrilata and Boronia viridiflora in the Northern Territory of Australia (Liddle, D.T. & A. Gibbons, 2007) [Recovery Plan] as Boronia quadrilata.
 
Federal Register of
    Legislative Instruments
Declaration under s178, s181, and s183 of the Environment Protection and Biodiversity Conservation Act 1999 - List of threatened species, List of threatened ecological communities and List of threatening processes (Commonwealth of Australia, 2000) [Legislative Instrument] as Boronia quadrilata.
 
Amendment to the list of threatened species under section 178 of the Environment Protection and Biodiversity Conservation Act 1999 (11/04/2007) (Commonwealth of Australia, 2007f) [Legislative Instrument] as Boronia quadrilata.
 
State Government
    Documents and Websites
NT:Threatened Species of the Northern Territory-Boronia quadrilata (Kerrigan, R. & I. Cowie, 2006g) [Information Sheet].
State Listing Status
NT: Listed as Vulnerable (Territory Parks and Wildlife Conservation Act 2000 (Northern Territory): 2012 list) as Boronia quadrilata
Scientific name Boronia quadrilata [64846]
Family Rutaceae:Sapindales:Magnoliopsida:Magnoliophyta:Plantae
Species author Duretto
Infraspecies author  
Reference Australian Systematic Botany 10(2): 297 (1997).
Other names Boronia quadrilata Duretto ms. [67435]
Distribution map Species Distribution Map

This is an indicative distribution map of the present distribution of the species based on best available knowledge. See map caveat for more information.

Illustrations Google Images

Boronia quadrilata is an erect shrub up to 3 m tall with sessile, glaucous leaves and large flowers (Duretto & Ladiges 1997). Stems are distinctly 4-angled with small longitudinal wings (Gibbons & Liddle 2003).

This species is endemic to Arnhem Land, NT, where it is known only from from the type locality at Magela Creek on the central plateau to the east of Kakadu National Park (Duretto 1999b; Gibbons & Liddle 2003). When first collected in 1991, it was known only from a single population of 10-15 plants (Duretto & Ladiges 1997). A subsequent survey in 2003 recorded 800 mature individuals within an area of 4 ha at the same location (Gibbons & Liddle 2003).

Boronia quadrilata is related to B. viridflora from which it can be distinguished by its erect habit, leaf shape, larger flowers and fruit, and the fact that it grows on ridgetops (Duretto & Ladiges 1997).

The population occurs in open shrubland on rocky sandstone slopes (Duretto & Ladiges 1997; Gibbons & Liddle 2003), adjacent to Allosyncarpia forest (Duretto 1999b).

Flowering and fruiting material has been collected in Oct. (Duretto & Ladiges 1997; Duretto 1999b).

During a 2003 survey, Boronia quadrilata was observed to resprout after fire with strong and vigorous new growth. Most resprouting individuals were flowering/fruiting in the population. Unburnt individuals were large and spindly with foliage only present high up on the stems. No seedlings and very few potentially juvenile individuals were present (Gibbons & Liddle 2003).

The following table lists known and perceived threats to this species. Threats are based on the International Union for Conservation of Nature and Natural Resources (IUCN) threat classification version 1.1.

Threat Class Threatening Species References
Climate Change and Severe Weather:Storms and Flooding:Natural events such as storms and cyclones leading to habitat destruction and flora/fauna mortality Boronia quadrilata in Species Profile and Threats (SPRAT) database (Department of the Environment and Heritage (DEH), 2006dj) [Internet].
National recovery plan for Boronia quadrilata and Boronia viridiflora in the Northern Territory of Australia (Liddle, D.T. & A. Gibbons, 2007) [Recovery Plan].
Ecosystem/Community Stresses:Indirect Ecosystem Effects:Restricted geographical distribution (area of occupancy and extent of occurrence) Boronia quadrilata in Species Profile and Threats (SPRAT) database (Department of the Environment and Heritage (DEH), 2006dj) [Internet].
National recovery plan for Boronia quadrilata and Boronia viridiflora in the Northern Territory of Australia (Liddle, D.T. & A. Gibbons, 2007) [Recovery Plan].
Natural System Modifications:Fire and Fire Suppression:Inappropriate and/or changed fire regimes (frequency, timing, intensity) Boronia quadrilata in Species Profile and Threats (SPRAT) database (Department of the Environment and Heritage (DEH), 2006dj) [Internet].
National recovery plan for Boronia quadrilata and Boronia viridiflora in the Northern Territory of Australia (Liddle, D.T. & A. Gibbons, 2007) [Recovery Plan].
Species Stresses:Indirect Species Effects:Low numbers of individuals Boronia quadrilata in Species Profile and Threats (SPRAT) database (Department of the Environment and Heritage (DEH), 2006dj) [Internet].
National recovery plan for Boronia quadrilata and Boronia viridiflora in the Northern Territory of Australia (Liddle, D.T. & A. Gibbons, 2007) [Recovery Plan].
Species Stresses:Indirect Species Effects:Poor recruitment (regeneration) and declining population numbers Boronia quadrilata in Species Profile and Threats (SPRAT) database (Department of the Environment and Heritage (DEH), 2006dj) [Internet].

Duretto, M.F. (1999b). Systematics of Boronia section Valvatae sensu lato (Rutaceae). Muelleria. 12(1):1-132.

Duretto, M.F. & P.Y. Ladiges (1997). Morphological variation within the Boronia grandisepala group (Rutaceae) and the description of nine taxa endemic to the Northern Territory, Australia. Australian Systematic Botany. 10(2):249-302.

Liddle, D.T. & A. Gibbons (2007). National recovery plan for Boronia quadrilata and Boronia viridiflora in the Northern Territory of Australia. [Online]. Northern Territory Department of Infrastructure, Planning and Environment, Darwin. Available from: http://www.environment.gov.au/biodiversity/threatened/publications/nt-boronias-quadrilata-and-viridiflora.html.

Russell-Smith, J., P. G. Ryan, D. Klessa, G. Waight and R. Harwood (1998). Fire regimes, fire-sensitive vegetation and fire manage ment of the sandstone Arnhem Plateau, monsoonal northern Australia. Journal of Applied Ecology. 35 (6):829-846. British Ecological Society, Blackwell Press.

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This database is designed to provide statutory, biological and ecological information on species and ecological communities, migratory species, marine species, and species and species products subject to international trade and commercial use protected under the Environment Protection and Biodiversity Conservation Act 1999 (the EPBC Act). It has been compiled from a range of sources including listing advice, recovery plans, published literature and individual experts. While reasonable efforts have been made to ensure the accuracy of the information, no guarantee is given, nor responsibility taken, by the Commonwealth for its accuracy, currency or completeness. The Commonwealth does not accept any responsibility for any loss or damage that may be occasioned directly or indirectly through the use of, or reliance on, the information contained in this database. The information contained in this database does not necessarily represent the views of the Commonwealth. This database is not intended to be a complete source of information on the matters it deals with. Individuals and organisations should consider all the available information, including that available from other sources, in deciding whether there is a need to make a referral or apply for a permit or exemption under the EPBC Act.

Citation: Department of the Environment (2014). Boronia quadrilata in Species Profile and Threats Database, Department of the Environment, Canberra. Available from: http://www.environment.gov.au/sprat. Accessed Mon, 28 Jul 2014 22:04:34 +1000.