Ecological disturbance index

This data represents a dimensionless ecological disturbance index, as the ratio of ecological succession and disturbance recurrence interval times the fraction of the area disturbed in any event. Small values of the ecological disturbance index represent decreasing proportions of time when disturbed/recovering habitats are present.

Simple

Identification info

Date (Publication)
2013-01-01T00:00:00
Citation identifier
Geoscience Australia Persistent Identifier/https://pid.geoscience.gov.au/dataset/ga/77003

Cited responsible party
Role Organisation / Individual Name Details
Publisher

Geoscience Australia

 Canberra
Author

Hughes, M.

 1
Point of contact
Role Organisation / Individual Name Details
Custodian

EGD
Owner

Commonwealth of Australia (Geoscience Australia)
Custodian

Commonwealth of Australia (Geoscience Australia)

 Voice
Topic category
  • Oceans

Extent

N
S
E
W


Maintenance and update frequency
Not planned
Keywords

  • Marine Data

Theme

  • seabed

Theme

  • oceanography

Theme

  • NERP Marine Biodiversity Hub

Theme

  • marine

Theme

  • NERP

Australian and New Zealand Standard Research Classification (ANZSRC)

  • Marine Geoscience

Keywords

  • Published_External

Resource constraints

Title

Creative Commons Attribution 4.0 International Licence

Alternate title

CC-BY

Edition

4.0

Website

http://creativecommons.org/licenses/

Access constraints
License
Use constraints
License

Resource constraints

Title

Australian Government Security ClassificationSystem

Edition date
2018-11-01T00:00:00
Website

https://www.protectivesecurity.gov.au/Pages/default.aspx

Classification
Unclassified
Language
English
Character encoding
UTF8

Distribution Information

Distributor contact
Role Organisation / Individual Name Details
Distributor

Commonwealth of Australia (Geoscience Australia)

 Voice
OnLine resource

File download

Download the data (ArcGIS-grid)

Distribution format

  • ArcGIS-grid

Resource lineage

Statement

Geoscience Australia's GEOMACS (Geological and Oceanographic Model of Australia's Continental Shelf) model was utilised to produce hindcast hourly time series of continental shelf (~20 - 300 m depth) bed shear stress on a 0.1 degree grid covering the period March 1997 to February 2008 (inclusive). The hindcast data represents the combined contribution to the bed shear stress by waves, tides, wind and density-driven circulation.

The ecological disturbance index is calculated using the following equation:

ED=FA*ES/RI

Where ED is the ecological disturbance index, FA is the spatial fraction multiplier, ES is the ecological succession (in days), and RI is the recurrence interval (in days). In this study, FA was assigned 1.0. ES equals 1 year (365 days) for mud, 3 years (1095 days) for sand and 5 years (1825 days) for gravel. While, RI is the average time between events when the Shields parameter exceeding 0.25 (the geomacs_ri layer).The seabed sediment was classified into gravel, sand or mud using a simple classification scheme (Folk, 1974). Grid cells were assigned to the gravel class if percent gravel was >30, and if the percent gravel was <30 they were assigned to either the sand or mud class depending on which ever had the largest percentage. The sediment grain size data used for this exercise were from the predicted layers of Li et al. (2011).

Please refer to Hughes et al. (2010) for further details.

Hughes, M.G., Harris, P.T., Brooke, B.P., 2010. Seabed exposure and ecological disturbance on Australia's continental shelf: Potential surrogates for marine biodiversity. Geoscience Australia Record 2010/43, 77pp.

Li, J., Heap, A.D., Potter, A., Huang, Z., 2011. Seabed gravel content across the Australian continental EEZ 2011, http://www.ga.gov.au/meta/ANZCW0703014835.html

Li, J., Heap, A.D., Potter, A., Huang, Z., 2011. Seabed sand content across the Australian continental EEZ 2011, http://www.ga.gov.au/meta/ANZCW0703014867.html

Hierarchy level
Dataset
Description

NERP Marine Biodiversity Hub

Metadata constraints

Title

Australian Government Security ClassificationSystem

Edition date
2018-11-01T00:00:00
Website

https://www.protectivesecurity.gov.au/Pages/default.aspx

Classification
Unclassified

Metadata

Metadata identifier
urn:uuid/e3dd1af5-7afe-50fd-e044-00144fdd4fa6

Title

GeoNetwork UUID

Language
English
Character encoding
UTF8
Contact
Role Organisation / Individual Name Details
Point of contact

Commonwealth of Australia (Geoscience Australia)

 Voice

Type of resource

Resource scope
Dataset
Name

dataset

Alternative metadata reference

Title

Geoscience Australia - short identifier for metadata record with

uuid

Citation identifier
eCatId/77003

Metadata linkage

https://ecat.ga.gov.au/geonetwork/srv/eng/catalog.search#/metadata/e3dd1af5-7afe-50fd-e044-00144fdd4fa6

Date info (Revision)
2018-04-22T08:40:52
Date info (Creation)
2013-08-14T00:00:00

Metadata standard

Title

AU/NZS ISO 19115-1:2014

Metadata standard

Title

ISO 19115-1:2014

Metadata standard

Title

ISO 19115-3

Title

Geoscience Australia Community Metadata Profile of ISO 19115-1:2014

Edition

Version 2.0, September 2018

Citation identifier
https://pid.geoscience.gov.au/dataset/ga/122551

 
 

Spatial extent

N
S
E
W


Keywords

NERP NERP Marine Biodiversity Hub marine oceanography seabed

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Associated resources

Not available