Risk to Biodiversity of the Gunn Point Area, 2020

Index:

Metadata
Citation
Description

Dataset Status
Data Quality
Contact Information
Data Dictionary
Supplementary Information

Metadata Details:

Name:AS/NZS ISO 19115 Geographic Information - Metadata, ANZLIC Metadata Profile

Version:1.0

Date Metadata Extracted:2024-11-22

Date Metadata Last Updated:2020-08-25

Current URL (HTML format) : http://www.ntlis.nt.gov.au/metadata/export_data?type=html&metadata_id=A79CC35AC58D6D15E0530101007F4257

Current URL (XML format) : http://www.ntlis.nt.gov.au/metadata/export_data?type=xml&metadata_id=A79CC35AC58D6D15E0530101007F4257

Citation

ANZLIC Identifier:A79CC35AC58D6D15E0530101007F4257

Title:Risk to Biodiversity of the Gunn Point Area, 2020

Citation Date:2020-07-17

Date Type:publication

Custodian:Department of Environment, Parks and Water Security

Description

Abstract:

This polygon spatial dataset describes the Risk to Biodiversity in the Gunn Point Area, north of Darwin in the Northern Territory. The Gunn Point Area covers approximately 71,000 ha. and is defined by the Howard Water Allocation Planning Areas north of Gunn Point Road to the coastline.

Flora surveys were undertaken between July 2018 and March 2019 to locate threatened plants, update species habitat models, and to refine mapping of sensitive and significant vegetation communities. Fauna surveys targeting threatened mammals, owls and frogs were undertaken between June 2018 and February 2019.

The aim of the assessment was to identify biodiversity values to support sustainable development of natural resources and to de-risk investment. The risk to biodiversity classes were developed to assist land use planning and development.

This information is part of the Mapping the Future Project - Gunn Point
This project has identified land capability, water availability and biodiversity values to support land planning and inform development potential over the Gunn Point area. Reports and maps can be viewed from the webpage: denr.nt.gov.au/land-resource-management/development-opportunities
- Development Potential of the Gunn Point Area (2020)
- Biodiversity Assessment of the Gunn Point Area (2020)
- Groundwater Resources of the Gunn Point Area (2020)
- Marine and Coastal Biodiversity Assessment of the Gunn Point Area (2020)
- Soil and Land Resources of the Gunn Point Area (2020)
- Soil and Land Suitability Assessment for Irrigated Agriculture in the Gunn Point Area (2017)
- Vegetation Communities of the Gunn Point Area (2020)

ANZLIC Search Words:

environment

Spatial Domain:

Bounding Coordinates:

North Bounding Coordinate:-12.14312

South Bounding Coordinate:-12.454458765

East Bounding Coordinate:131.29259958

West Bounding Coordinate:130.99281984

Dataset Status

Dataset ID:

Language:English

Character Set: Latin 1

Progress:completed

Maintenance and Update Frequency:notPlanned

Data Currency Start Date:2018-06-01

Data Currency End Date:2020-06-18

Access Constraint:Download the spatial data package (contains spatial data, maps and reports) via data.nt.gov.au/

You are licensed to use the DENR geospatial products on the terms and conditions set out in:
Creative Commons Attribution 4.0 International Public License (CC BY 4.0) at: https://creativecommons.org/licenses/by/4.0/legalcode
If you do not agree to the terms and conditions you must not use the geospatial products.
You are free to copy, communicate and adapt the licensed material, provided that you abide by the licence terms (including Attribution) and attribute the licensed material using the statement:
Supplied by the Department of Environment and Natural Resources. Copyright Northern Territory Government.

Data Quality

Lineage:Biodiversity values were identified in the Gunn Point area from vegetation communities mapping (Vegetation Communities of the Gunn Point Area (2020), species habitat suitability modelling and targeted flora and fauna surveys (Biodiversity Assessment of the Gunn Point Area (2020), and historical species location records derived from the Department's Flora Atlas and Fauna Atlas.

Biodiversity values data were compiled into five classes. The data source for each class was kept in the final output. Descriptions for the classes are noted in the Data Dictionary in this metadata record.
- Class 1. Remnant vegetation not present
- Class 2. Project area including defined polygons for waterbodies
- Class 3. Areas with high likelihood of containing important habitat for threatened species (Typhonium praetermissum, Cycas armstrongii, Stylidium ensatum)
- Class 4. Sensitive and significant vegetation communities
- Class 5. High biodiversity value areas

The five biodiversity values classes were unioned using ArcGIS 10.6 software. A Risk to Biodiversity ranking was compiled to resolve overlapping attributes for each class. Each selection will overwrite any previous selections.
Select C3_Class = 3; create BioRisk = 3
Select C4_Class = 4; create Bio_Risk = 4
Select C5_Class = 5; create Bio_Risk = 5
Select C1_Class = 1; create Bio_Risk = 1
Select BioRisk = 0 (remaining polys); create BioRisk = C2_Class (keep 0, 2 or 9 values)

Positional Accuracy:

Attribute Accuracy:Field data (site information) described and classified according to national standards at the time of capture. Attribute values are assigned to each polygon and described in the Data Dictionary below. The attribute naming format uses 10 characters with no spaces to be suitable for an ESRI shape-file format. An alias attribute name is applied to an ESRI file geo-database format.

Logical Consistency:polygons may be multi-part

Completeness:Complete

Contacts

Name Organisation Position Role Phone Fax Email

Data Requests Officer Department of Environment, Parks and Water Security Geospatial Services Branch (on behalf of department) distributor datarequests.depws@nt.gov.au

Name	Organisation	Position	Role	Phone	Fax	Email
Data Requests Officer	Department of Environment, Parks and Water Security	Geospatial Services Branch (on behalf of department)	distributor			datarequests.depws@nt.gov.au

Data Dictionary

Attribute Attribute Description Possible Code Code Description

01. Project Project name

02. BioRisk Alias: Risk to Biodiversity Class

Datasets from a range of sources were joined to create a Risk to Biodiversity Class ranked from 1 to 5, ranging from Nil Biodiversity Risk to High Biodiversity Risk.
The Risk to Biodiversity Class contains 3 parts referring to Description 1, 2 and 3. They are joined together for mapping display. Risk 0 Not assessed.

Risk 1 NIL, Highly modified, Land that has had significant alteration by land use, development, mining or infrastructure.

Risk 2 LOW, No significant biodiversity value, No significant values identified.

Risk 3 UNCERTAIN, Requires further biodiversity assessment, Land that may require further biodiversity assessment before any development approval, dependent on the likelihood of occurrence of threatened species. Some land may require management or protection.

Risk 4 MODERATE, Sensitive and/or significant vegetation, Land containing sensitive or significant vegetation types as identified in the NT Land Clearing Guidelines.

Risk 5 HIGH, High biodiversity value, Land having high biodiversity value based on significant vegetation community type in combination with threatened species occurrence records.

Risk 9 Water body

03. BioDesc1 Alias: BioRisk - Description 1

Part 1 of the Biodiversity Risk Class description.

04. BioDesc2 Alias: BioRisk - Description 2

Part 2 of the Biodiversity Risk Class description.

05. BioDesc3 Alias: BioRisk - Description 3

Part 3 of the Biodiversity Risk Class description.

06. C1_Class Alias: Class 1 - Remnant veg not present

Origins of Class 1 data is Vegetation Communities of the Gunn Point Area (2020), where COM_GROUP = 'Remnant Vegetation Not Present'. 0 Polygons are not Class 1.

1 Polygons are Class 1.

07. C2_Class Alias: Class 2 - Not assessed

Origins of Biodiversity Class 2 data are the extent of the Gunn Point study area and water bodies from Napier 2020 Vegetation of Gunn Point. 0 Polygons represent areas that have not been assessed in this project.

1 Polygons are Class 2.

9 Polygons represent water bodies.

08. C3_Class Alias: Class 3 - Threatened Sp.

Origins of Biodiversity Class 3 data were compiled by the Flora and Fauna Division for this project to describe the high likelihood that 3 threatened species may be present - Cycas armstrongii, Typhonium praetermissum, Stylidium ensatum. 0 Polygons are not Class 3.

3 Polygons are Class 3.

09. C3_Source Alias: Class 3 - Source (C,T,S)

The threatened species source for each polygon is noted as a concatenated value.
Example: 1, 0, 1.
Cycas armstrongii = yes, Typhonium praetermissum = no, Stylidium ensatum = yes. Null Polygons are not Class 3.

10. C3_Cycas Alias: Class 3 - Cycas armstrongii

Heuristic modelling identified areas of high suitability habitat for high density stands of Cycas armstrongii (Biodiversity Assessment of the Gunn Point Area (2020)). Polygons were derived from vegetation community and land unit mapping (Brock 1995, Easey et al. 2017, Fogarty et al. 1984, Napier et al. 2020). 0 Likelihood of containing important habitat for the species is not high.

1 High likelihood of containing important habitat for the species.

11. C3_Typh Alias: Class 3 - Typhonium praetermissum

High suitability habitat areas for Typhonium praetermissum are derived from Mapped Distribution for Threatened Species of the Greater Darwin Region - Typhonium praetermissum - Version 3.2 (http://www.ntlis.nt.gov.au/metadata/export_data?type=html&metadata_id=35A8F264A830E4BCE050CD9B214471C4). 0 Likelihood of containing important habitat for the species is not high.

1 High likelihood of containing important habitat for the species.

12. C3_Stylid Alias: Class 3 - Stylidium ensatum

High suitability habitat areas for Stylidium ensatum were derived from species distribution modelling, using a 10m x 10m raster cell size resolution (based on Sentinel-2 image data). Source - Flora and Fauna Division, DENR. 0 Likelihood of containing important habitat for the species is not high.

1 High likelihood of containing important habitat for the species.

13. C4_Class Alias: Class 4 - Significant Vegetation

Rainforests, wetland communities and sandsheet heaths are identified as sensitive and significant vegetation communities (NT Land Clearing Guidelines, Department of Environment and Natural Resources 2019), and are habitat for a number of significant species and provide important ecosystem services.
Origins of Biodiversity Class 4 were derived by the Flora and Fauna division using Napier 2020, Vegetation of Gunn Point to select significant vegetation communities. 0 Polygons are not Class 4.

4 Polygons are Class 4.

14. C4_VegCom Alias: Class 4 - Vegetation Community

Significant vegetation communities classified as the following;
- Mangroves and salt flats
- Rainforest Dry
- Rainforest Wet
- Sandsheet Heath Vegetation
- Wetland Null Polygons are not Class 4.

15. C4_Source Alias: Class 4 - Source
Napier 2020, Vegetation of Gunn Point. Null Polygons are not Class 4.

16. C4_GDE Alias: Class 4 - GDE, Type

Groundwater Dependent Ecosystems - classified as the following;
- Permanent, Type 2 (surface expression)
- Seasonal, Type 2 (surface expression)
- Seasonal, Type 3 (subsurface expression) Null Polygons are not Class 4.

17. C5_Class Alias: Class 5 - High value areas

High biodiversity value areas were identified based on criteria reported in Biodiversity Assessment of the Gunn Point Area (2020), and polygons derived from the department's Flora and Fauna division using Napier 2020, Vegetation of Gunn Point.
- Class 5 polygons are also part of Class 4 Significant Vegetation.
- 2 polygons representing high density locations of Typhonium praetermissum have been included in Class 5. 0 Polygons are not Class 5.

5 Polygons are Class 5.

18. C5_VegCom Alias: Class 5 - Vegetation Community

Significant vegetation communities classified as the following;
- Mangroves and salt flats
- Rainforest Dry
- Rainforest Wet
- Sandsheet Heath Vegetation
- Wetland 0 Polygons are not Class 5.

5 Polygons are Class 5.

19. C5_Source Alias: Class 5 - Source

Napier 2020, Vegetation of Gunn Point.
Cuff 2019, Threatened Species of the Darwin Region. Null or 0 Polygons are not Class 5.

20. Area_ha Alias: Area (ha)

Each polygon in the dataset has an area calculation in hectares.

Attribute	Attribute Description	Possible Code	Code Description
01. Project	Project name
02. BioRisk	Alias: Risk to Biodiversity Class Datasets from a range of sources were joined to create a Risk to Biodiversity Class ranked from 1 to 5, ranging from Nil Biodiversity Risk to High Biodiversity Risk. The Risk to Biodiversity Class contains 3 parts referring to Description 1, 2 and 3. They are joined together for mapping display.	Risk 0	Not assessed.
		Risk 1	NIL, Highly modified, Land that has had significant alteration by land use, development, mining or infrastructure.
		Risk 2	LOW, No significant biodiversity value, No significant values identified.
		Risk 3	UNCERTAIN, Requires further biodiversity assessment, Land that may require further biodiversity assessment before any development approval, dependent on the likelihood of occurrence of threatened species. Some land may require management or protection.
		Risk 4	MODERATE, Sensitive and/or significant vegetation, Land containing sensitive or significant vegetation types as identified in the NT Land Clearing Guidelines.
		Risk 5	HIGH, High biodiversity value, Land having high biodiversity value based on significant vegetation community type in combination with threatened species occurrence records.
		Risk 9	Water body
03. BioDesc1	Alias: BioRisk - Description 1 Part 1 of the Biodiversity Risk Class description.
04. BioDesc2	Alias: BioRisk - Description 2 Part 2 of the Biodiversity Risk Class description.
05. BioDesc3	Alias: BioRisk - Description 3 Part 3 of the Biodiversity Risk Class description.
06. C1_Class	Alias: Class 1 - Remnant veg not present Origins of Class 1 data is Vegetation Communities of the Gunn Point Area (2020), where COM_GROUP = 'Remnant Vegetation Not Present'.	0	Polygons are not Class 1.
		1	Polygons are Class 1.
07. C2_Class	Alias: Class 2 - Not assessed Origins of Biodiversity Class 2 data are the extent of the Gunn Point study area and water bodies from Napier 2020 Vegetation of Gunn Point.	0	Polygons represent areas that have not been assessed in this project.
		1	Polygons are Class 2.
		9	Polygons represent water bodies.
08. C3_Class	Alias: Class 3 - Threatened Sp. Origins of Biodiversity Class 3 data were compiled by the Flora and Fauna Division for this project to describe the high likelihood that 3 threatened species may be present - Cycas armstrongii, Typhonium praetermissum, Stylidium ensatum.	0	Polygons are not Class 3.
		3	Polygons are Class 3.
09. C3_Source	Alias: Class 3 - Source (C,T,S) The threatened species source for each polygon is noted as a concatenated value. Example: 1, 0, 1. Cycas armstrongii = yes, Typhonium praetermissum = no, Stylidium ensatum = yes.	Null	Polygons are not Class 3.
10. C3_Cycas	Alias: Class 3 - Cycas armstrongii Heuristic modelling identified areas of high suitability habitat for high density stands of Cycas armstrongii (Biodiversity Assessment of the Gunn Point Area (2020)). Polygons were derived from vegetation community and land unit mapping (Brock 1995, Easey et al. 2017, Fogarty et al. 1984, Napier et al. 2020).	0	Likelihood of containing important habitat for the species is not high.
		1	High likelihood of containing important habitat for the species.
11. C3_Typh	Alias: Class 3 - Typhonium praetermissum High suitability habitat areas for Typhonium praetermissum are derived from Mapped Distribution for Threatened Species of the Greater Darwin Region - Typhonium praetermissum - Version 3.2 (http://www.ntlis.nt.gov.au/metadata/export_data?type=html&metadata_id=35A8F264A830E4BCE050CD9B214471C4).	0	Likelihood of containing important habitat for the species is not high.
		1	High likelihood of containing important habitat for the species.
12. C3_Stylid	Alias: Class 3 - Stylidium ensatum High suitability habitat areas for Stylidium ensatum were derived from species distribution modelling, using a 10m x 10m raster cell size resolution (based on Sentinel-2 image data). Source - Flora and Fauna Division, DENR.	0	Likelihood of containing important habitat for the species is not high.
		1	High likelihood of containing important habitat for the species.
13. C4_Class	Alias: Class 4 - Significant Vegetation Rainforests, wetland communities and sandsheet heaths are identified as sensitive and significant vegetation communities (NT Land Clearing Guidelines, Department of Environment and Natural Resources 2019), and are habitat for a number of significant species and provide important ecosystem services. Origins of Biodiversity Class 4 were derived by the Flora and Fauna division using Napier 2020, Vegetation of Gunn Point to select significant vegetation communities.	0	Polygons are not Class 4.
		4	Polygons are Class 4.
14. C4_VegCom	Alias: Class 4 - Vegetation Community Significant vegetation communities classified as the following; - Mangroves and salt flats - Rainforest Dry - Rainforest Wet - Sandsheet Heath Vegetation - Wetland	Null	Polygons are not Class 4.
15. C4_Source	Alias: Class 4 - Source Napier 2020, Vegetation of Gunn Point.	Null	Polygons are not Class 4.
16. C4_GDE	Alias: Class 4 - GDE, Type Groundwater Dependent Ecosystems - classified as the following; - Permanent, Type 2 (surface expression) - Seasonal, Type 2 (surface expression) - Seasonal, Type 3 (subsurface expression)	Null	Polygons are not Class 4.
17. C5_Class	Alias: Class 5 - High value areas High biodiversity value areas were identified based on criteria reported in Biodiversity Assessment of the Gunn Point Area (2020), and polygons derived from the department's Flora and Fauna division using Napier 2020, Vegetation of Gunn Point. - Class 5 polygons are also part of Class 4 Significant Vegetation. - 2 polygons representing high density locations of Typhonium praetermissum have been included in Class 5.	0	Polygons are not Class 5.
		5	Polygons are Class 5.
18. C5_VegCom	Alias: Class 5 - Vegetation Community Significant vegetation communities classified as the following; - Mangroves and salt flats - Rainforest Dry - Rainforest Wet - Sandsheet Heath Vegetation - Wetland	0	Polygons are not Class 5.
		5	Polygons are Class 5.
19. C5_Source	Alias: Class 5 - Source Napier 2020, Vegetation of Gunn Point. Cuff 2019, Threatened Species of the Darwin Region.	Null or 0	Polygons are not Class 5.
20. Area_ha	Alias: Area (ha) Each polygon in the dataset has an area calculation in hectares.

Supplementary Information

BIBLIOGRAPHIC REFERENCE:
Stokeld, D., Leiper, I., Cuff, N., Cowie, I., Lewis, D. and Einoder, L. (2020).
Mapping the Future Project - Gunn Point.
Biodiversity Assessment of the Gunn Point Area.
Technical Report 4/2020. Department of Environment and Natural Resources, Darwin, NT.

Download report from NT Library hdl.handle.net/10070/797846
Download map product for this survey www.ntlis.nt.gov.au/mpds/get_file?file_id=8604

RELATED INFORMATION
Vegetation Communities of the Gunn Point Area.
Metadata: www.ntlis.nt.gov.au/metadata/export_data?type=html&metadata_id=8739BD7DA89BF802E050CD9B214469EB

Mapped Distribution for Threatened Species of the Greater Darwin Region. (Typhonium praetermissum)
Metadata: www.ntlis.nt.gov.au/metadata/export_data?type=html&metadata_id=35A8F264A830E4BCE050CD9B214471C4

Howard River Sand Plains Site of Conservation Significance (SOCS), 2013
Metadata: http://www.ntlis.nt.gov.au/metadata/export_data?type=html&metadata_id=9577E8038E5F6289E0530101007FB6D6

NT Land Use Mapping 2016
Metadata: http://www.ntlis.nt.gov.au/metadata/export_data?type=html&metadata_id=5779F987695AE0FAE050CD9B21447ADC

Monsoon Vine-Forest Distribution (Rainforests)
Metadata: www.ntlis.nt.gov.au/metadata/export_data?type=html&metadata_id=2DBCB771203306B6E040CD9B0F274EFE

Brock, J. (1995). Remnant vegetation survey: Darwin to Palmerston region. A Report to Greening Australia NT.

Cuff, N, and Green, C. (2019). Mapped Distribution for Threatened Species of the Greater Darwin Region - Typhonium praetermissum, Version 2.0 January 2019, Department of Environment and Natural Resources, Northern Territory Government.

Easey, D, Brocklehurst, P, and Emberg, J. (2017). Agricultural Land Suitability Series, Report 7. Soil and Land Suitability Assessment for Irrigated Agriculture in the Gunn Point Area Technical Report 7/2017D. Department of Environment and Natural Resources, Northern Territory Government. Darwin, NT.

Fogarty, PJ, Lynch, B, and Wood, BG. (1984). Land Resources of the Elizabeth, Darwin and Blackmore Rivers - Greater Darwin Area, Northern Territory. Report Number 15/84D. Land Conservation Unit. Conservation Commission of the Northern Territory. Northern Territory Government, Darwin, NT Retrieved from hdl.handle.net/10070/229286.

Liddle, DT, Harkness, P, Westaway, J, Lewis, DL, and Cowie, ID. (2013). Vegetation communities and plant biodiversity values of the seasonally saturated lands of the Howard Sand Plains Site of Conservation Significance in the Northern Territory of Australia. Report to the Australian Government Caring for our Country initiative. Department of Land Resource Management, Northern Territory Government. Palmerston, NT.

Napier, D, Edmeades, B, and Green, C. (2020). Vegetation Communities of the Gunn Point Area. Technical Report 8/2020. Department of Environment and Natural Resources, Northern Territory of Australia. Darwin, NT.

This record maintained using the NTLIS Metadata Tool

Metadata : Risk to Biodiversity of the Gunn Point Area, 2020