Title

Biliirrgan Glossy Black-Cockatoo habitat mapping

Data Quality Statement

Name: Data Quality Statement

Protocol: WWW:DOWNLOAD-1.0-http--download

Description:

Data quality statement for Biliirrgan Glossy Black-Cockatoo habitat mapping

Function: download

Download Package

Name: Download Package

Protocol: WWW:DOWNLOAD-1.0-http--download

Description:

Data (Shapefile)

Function: download

Code

7109b8c8-792d-4fc8-bdc2-776cad439f86

Name

ISO 19115

Edition

2016

Type

vector

Code identifying the spatial reference system

4283

Topic category

Title

ANZLIC Search Words

Reference date

2008-05-16

NSW Place Name

Coffs Harbour

Coordinate reference system

Authority code

urn:ogc:def:cs:EPSG::

Code identifying the coordinate reference system

5711

End position

N/A

Contact info

Contact position

Data Broker

Organisation name

NSW Department of Climate Change, Energy, the Environment and Water

Telephone number

131555

Email address

data.broker@environment.nsw.gov.au

Web address

https://www.nsw.gov.au/departments-and-agencies/dcceew

Responsible party role

pointOfContact

Lineage

The mapping for Nambucca, Bellingen and Clarence LGAs is derived from the State Vegetation Type Map (SVTM, release C1.1M1) using Plant Community Type data; the mapping for Coffs LGA is derived from the fine-scale mapping of the Coffs Harbour Local Government Area (VIS_ID 4189) using vegetation community data. PCTs/vegetation communities were classified as Glossy Black-Cockatoo habitat if either Allocasuarina torulosa (Forest Oak) or Allocasuarina littoralis (Black She-oak) had a mean cover-abundance score of at least 2 (equating to at least 5 plants, and at least 5% cover, in a 20 m by 20 m plot) AND the frequency (i.e. the proportion of flora survey plots in which a species was recorded) of Forest Oak and Black She-oak in that community summed to at least 10%. Habitat was subdivided into classes (e.g. littoralis_High) based on the frequency and cover abundance of the most frequent Allocasuarina species, as follows:

torulosa_Mod: dominant (most frequent) Allocasuarina is Allocasuarina torulosa,summed Allocasuarina frequency is 10%-55%, mean cover-abundance is 2 or greater (equating to at least 5 plants, and at least 5% cover) torulosa_High: dominant (most frequent) Allocasuarina is Allocasuarina torulosa,summed Allocasuarina frequency is >55%, mean cover-abundance is 2 or greater (equating to at least 5 plants, and at least 5% cover) littoralis_Mod: dominant (most frequent) Allocasuarina is Allocasuarina littoralis; summed Allocasuarina frequency is 10%-55%; mean cover-abundance is 2 or greater (equating to at least 5 plants, and at least 5% cover) littoralis_High: dominant (most frequent) Allocasuarina is Allocasuarina littoralis; summed Allocasuarina frequency is >55%; mean cover-abundance is 2 or 3 (equating to at least 5 plants, and 5%-50% cover) littoralis_VeryHigh: dominant (most frequent) Allocasuarina is Allocasuarina littoralis; summed Allocasuarina frequency is >55%; mean cover-abundance is 4 or greater (equating to at least 5 plants, and >50% cover)

A total of 150 sites were surveyed in the field, and the density of Allocasuarina cones was estimated at each site, allowing the calculation of the mean number of Allocasuarina cones per hectare for each habitat class.

The Biliirrgan Glossy Black-Cockatoo habitat mapping was derived from the best available existing vegetation mapping for each Local Government Area. However, the existing mapping was not designed specifically for recording Allocasuarina densities, and was done at a scale which means that there are often discrepancies between mapped vegetation communities and the vegetation on the ground. Also, Allocasuarinas are not evenly distributed across a community, but tend to be clumped as a result of factors such as fire history. Therefore, even where the underlying vegetation mapping is correct, Allocasuarina densities may differ substantially from the average for a given vegetation community.

Field investigations found that the Biliirrgan Glossy Black-Cockatoo habitat mapping was reliable at larger scales: for instance, landscapes where there are large areas of mapped high quality Glossy Black-Cockatoo habitat did indeed tend to have large areas of high quality habitat. However, because of the limitations outlined above, at finer scales the mapping is less reliable – e.g. Allocasuarinas may be completely absent from a site mapped as High or Very High quality habitat, or may occur in high densities at sites not mapped as habitat at all. At finer scales, the map should not be assumed to be a true representation of habitat on ground.

Limitations on public access

Contact position

Data Broker

Organisation name

NSW Department of Climate Change, Energy, the Environment and Water

Telephone number

131555

Email address

data.broker@environment.nsw.gov.au

Web address

https://www.nsw.gov.au/departments-and-agencies/dcceew

Responsible party role

pointOfContact

Contact position

Data Broker

Organisation name

NSW Department of Climate Change, Energy, the Environment and Water

Telephone number

131555

Email address

data.broker@environment.nsw.gov.au

Web address

https://www.nsw.gov.au/departments-and-agencies/dcceew

Responsible party role

pointOfContact