Caley's Grevillea  |  

Justification Extreme fluctuations are evident in recruitment after fire (see Auld and Scott 2004) and the species is at risk of too frequent fire throughout most of its habitat.

Fluctuations can be affected by the degree of soil heating during a fire; fire seasonality; post fire rainfall; and browsing impacts on post fire seedlings.

Justification Extreme fluctuations are evident in recruitment after fire and the species is at risk of too frequent fire throughout most of its habitat (see Auld Scott 2004).

Fluctuations can be affected by the degree of soil heating during a fire; fire seasonality; post fire rainfall; and browsing impacts on post fire seedlings.

Justification Regan and Auld (2004) suggest that extinction risk currently varies from 60 (low fire frequency 15 30 years between fires) to 96 (high fire frequency five years between fires) in years due to the risk of wildfire burning over any planned fires.

Other threats to G. caleyi are an adverse fire regime; particularly high fire frequency due to hazard reduction burning and increased risk of ignition; and the absence of fire at some sites leading to plant reductions due to a lack of fire stimulated regeneration (Regan et al. 2003 Regan and Auld 2004) the invasion of habitat by weeds; in particular Lantana (Lantana camara); Blackberry (Rubus anglocandicans A.Newton); Privet (Ligustrum sp.); Crofton weed (Ageratina adenophora); Cotoneaster sp.; Pampas Grass (Cortaderia selloana) and Acacia saligna (a native of Western Australia) and disturbance at some sites from vehicles; bikes; horse riding and rubbish dumping (DEC 2004).

Other threats to G. caleyi are an adverse fire regime; particularly high fire frequency due to hazard reduction burning and increased risk of ignition; and the absence of fire at some sites leading to plant reductions due to a lack of fire stimulated regeneration (Regan et al. 2003 Regan and Auld 2004) the invasion of habitat by weeds; in particular Lantana (Lantana camara); Blackberry (Rubus anglocandicans A.Newton); Privet (Ligustrum sp.); Crofton weed (Ageratina adenophora); Cotoneaster sp.; Pampas Grass (Cortaderia selloana) and Acacia saligna (a native of Western Australia) and disturbance at some sites from vehicles; bikes; horse riding and rubbish dumping (DEC 2004).

Loss and degradation of native plant and animal habitat by invasion of escaped garden plants; including aquatic plants ; The invasion; establishment and spread of Lantana (Lantana camara L. sens. lat) and High frequency fire resulting in the disruption of life cycle ESTABLISHED BY THE THREATENED SPECIES CONSERVATION ACT Contact Address C o PO Box 1967 Hurstville BC NSW 1481 Telephone (02) 9585 6940 Facsimile (02) 9585 NSW SCIENTIFIC COMMITTEE processes in plants and animals and loss of vegetation structure and composition are listed as Key Threatening Processes under the NSW Threatened Species Conservation Act 1995. 7.