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Identification

Field Value

Title

Ecological carrying capacity of terrestrial habitat

Abstract

This Indicator accounts for how the generalised quality of terrestrial habitats supporting biodiversity at each location and its connection with habitat at other locations within a neighbourhood enables biological movement such as foraging, dispersal and migration. It is used to account for the carrying capacity of a landscape to support its original complement of biodiversity and ecosystems. This indicator (3.1c) is part of a family of measures on the condition and connectivity of habitat, including its capacity to support the needs of native plants, animals and ecosystems in NSW, as a proportion relative to that in the pre-industrial era. Ecological condition and ecological carrying capacity are used to estimate the ‘state of biodiversity including undiscovered species’ and ecological condition is used to estimate ‘expected survival of all known and undiscovered species’ is one of a series of indicators on the status of biodiversity and ecological integrity in NSW developed to contribute to assessing the performance of the Biodiversity Conservation Act 2016. The overarching indicator framework which outlines how indicators are related and derived is presented in the “method to assess biodiversity and ecological integrity across New South Wales” (OEH, 2018).

Resource locator

Data Quality Statement

Name: Data Quality Statement

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

Description:

Data quality statement for Ecological carrying capacity of terrestrial native vegetation indicator

Function: download

Download Package

Name: Download Package

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

Description:

Raster Data (TIFF)

Function: download

Unique resource identifier

Code

3e90e34d-7423-4932-bb7c-625ff1ec9074

Presentation form

documentDigital

Edition

1

Dataset language

eng

Metadata standard

Name

ANZLIC Metadata Profile: An Australian/New Zealand Profile of AS/NZS ISO 19115:2005, Geographic information - Metadata

Version

1.1

Dataset URI

https://datasets.seed.nsw.gov.au/dataset/3e90e34d-7423-4932-bb7c-625ff1ec9074

Purpose

Legislative and regulatory requirements

Status

completed

Spatial representation type

grid

Spatial reference system

Authority code

GDA94 Geographic (Lat\Long)

Code identifying the spatial reference system

4283

Spatial resolution

90 m

Additional information source

Love, J., Drielsma, M. J., Williams, K., Thapa, R., (2018) Data package for habitat condition indicators; 3.1a ecological condition, 3.1b ecological connectivity and 3.1c ecological carrying capacity. Biodiversity Indicator Program, NSW Office of Environment and Heritage, Sydney. OEH (2018). A Method to Assess Biodiversity and Ecological Integrity across New South Wales. NSW Office of Environment and Heritage, Sydney. Love, J., Drielsma, M. J., Williams, K., Thapa, R., (2018) A new integrated model-data fusion approach to measuring ecosystem quality for ecological integrity reporting. Biodiversity Indicator Program Implementation Report Series, NSW Office of Environment and Heritage, Sydney.

Classification of spatial data and services

Field Value

Topic category

Biota

Keywords

Field Value

Keyword set

keyword value

ECOLOGY-Landscape

VEGETATION

FLORA-Native

Originating controlled vocabulary

Title

ANZLIC Search Words

Reference date

2008-05-16

Geographic location

West bounding longitude

140.800781

East bounding longitude

153.720703

North bounding latitude

-37.160317

South bounding latitude

-28.188244

NSW Place Name

NSW

Vertical extent information

Minimum value

-100

Maximum value

2228

Coordinate reference system

Authority code

urn:ogc:def:cs:EPSG::

Code identifying the coordinate reference system

5711

Temporal extent

Begin position

1995-01-01

End position

N/A

Dataset reference date

Date type

creation

Effective date

2013-03-25

Date type

publication

Effective date

2020-05-21

Resource maintenance

Maintenance and update frequency

asNeeded

Date of next update

2022-06-30

Contact info

Organisation name

Department of Planning, Industry and Environment

Full postal address

PO Box A290

Sydney South

NSW

1232

Australia

data.broker@environment.nsw.gov.au

Telephone number

131555

Facsimile number

02 9995 5999

Email address

data.broker@environment.nsw.gov.au

Responsible party role

pointOfContact

Quality and validity

Field Value

Lineage

Ecological carrying capacity (Biodiversity Indicator Program, Indicator 3.1c) is a measure of colonisation potential (Hanski 1999) that uses spatial context analysis to build on ecological condition by integrating condition at each location with its connectivity to habitat in a surrounding neighbourhood. Spatial context analysis is performed using a similar least cost paths algorithm to that described above for ecological connectivity, with differences in how the accumulated values are assigned to the output grid. Where ecological connectivity values are determined at each grid cell from the accumulation of permeabilities of each traversing path, context analysis accumulates path values at their source by treating each cell as a focal cell from which paths originate. In this way, a measure of how well connected each cell is to its surrounding habitat is derived without requiring the paths between locations to be specifically mapped. Conceptually, the underlying algorithm for 3.1b and 3.1c are identical apart from parameterisation, and through planned refinements will be fully integrated into a single process.

Spatial context measures Neighbourhood Habitat Area (NHA) using the concept of colonisation potential (Hanski 1999, Drielsma & Ferrier 2009) and uses the Cost Benefit Approach (CBA) (Drielsma et al., 2007b) to model the amount of habitat accessible from, or connected to, each location. CBA, like the Spatial Links approach, is an adaptation of Dijkstra’s Least Cost Path (LCP) graph search algorithm (Dijkstra 1959; Cormen et al., 2001) used to solve Single-Source Shortest Path (SSSP) trees over rasterised spatial data. CBA is used to simulate generalised ecological processes including foraging, dispersal (of both flora and fauna) and migration across continuous valued rasterised representations of complex landscapes. Various sampling strategies are used to emulate entity properties such as habitat preferences, resource requirements, movement abilities and home range to propagule dispersal operating scales. To reflect the continuous and evolving nature of ecological processes, and account for indirect influences of change in other parts of the landscape, CBA is performed repeatedly with the habitat input of successive iterations moderated by the previous measure of NHA.

To derive ecological carrying capacity, CBA is applied using generalised parameters and spatial inputs scaled to multiple spatial resolutions that, like ecological connectivity, account for processes operating across a range of ecological scales. As with ecological connectivity, spatial inputs for ecological carrying capacity are sampled using multiple pixel offsets at each scale to account for the loss of detail that occurs when aggregating raster grids up to coarser resolutions. CBA is applied independently for each spatial resolution and at each sampled offset over several iterations where the habitat input of each is tempered by the output of the last. Once derived, the final NHA grids are resampled back to the

original finest resolution before being additively combined. The results of each resolution are equally weighted to moderate the contribution of each scale then added together with an equally weighted contribution from ecological condition resulting in a single spatial product measuring ecological carrying capacity representative of multiple ecological scales, at each 90 by 90 metre grid cell across the State. For more information and identification of the data used in the indicator refer to the work flow and implementation report in the data package.

Constraints related to access and use

Field Value

Constraint set

Use constraints

This data is provided under a Creative Commons Attribution 4.0 licence http://creativecommons.org/licenses/by/4.0 Attribute 'Department of Planning, Industry and Environment ' in publications using this data.

Limitations on public access

Data Quality

Field Value

Scope

dataset

Responsible organisations

Field Value

Responsible party

Contact position

Data Broker

Organisation name

Department of Planning, Industry and Environment

Full postal address

PO Box A290

Sydney South

NSW

1232

Australia

data.broker@environment.nsw.gov.au

Telephone number

131555

Facsimile number

02 9995 5999

Email address

data.broker@environment.nsw.gov.au

Web address

http://www.planning.nsw.gov.au/

Responsible party role

pointOfContact

Metadata on metadata

Field Value

Metadata point of contact

Contact position

Data Broker

Organisation name

Department of Planning, Industry and Environment

Full postal address

PO Box A290

Sydney South

NSW

1232

Australia

data.broker@environment.nsw.gov.au

Telephone number

131555

Facsimile number

02 9995 5999

Email address

data.broker@environment.nsw.gov.au

Responsible party role

distributor

Metadata date

2018-03-29

Metadata language

eng