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Multi-temporal mapping of seagrass cover, species and biomass of the Eastern Banks, Moreton Bay

The spatial and temporal dynamics of seagrasses have been studied from the leaf to patch (100 m**2) scales. However, landscape scale (> 100 km**2) seagrass population dynamics are unresolved in seagrass ecology. Previous remote sensing approaches have lacked the temporal or spatial resolution, or ecologically appropriate mapping, to fully address this issue. This paper presents a robust, semi-automated object-based image analysis approach for mapping dominant seagrass species, percentage cover and above ground biomass using a time series of field data and coincident high spatial resolution satellite imagery. The study area was a 142 km**2 shallow, clear water seagrass habitat (the Eastern Banks, Moreton Bay, Australia). Nine data sets acquired between 2004 and 2013 were used to create seagrass species and percentage cover maps through the integration of seagrass photo transect field data, and atmospherically and geometrically corrected high spatial resolution satellite image data (WorldView-2, IKONOS and Quickbird-2) using an object based image analysis approach. Biomass maps were derived using empirical models trained with in-situ above ground biomass data per seagrass species. Maps and summary plots identified inter- and intra-annual variation of seagrass species composition, percentage cover level and above ground biomass. The methods provide a rigorous approach for field and image data collection and pre-processing, a semi-automated approach to extract seagrass species and cover maps and assess accuracy, and the subsequent empirical modelling of seagrass biomass. The resultant maps provide a fundamental data set for understanding landscape scale seagrass dynamics in a shallow water environment. Our findings provide proof of concept for the use of time-series analysis of remotely sensed seagrass products for use in seagrass ecology and management.

Simple

Identification info

Date (Publication)
2017-01-10

Principal investigator

School of Geography, Planning and Environmental Management, The University of Queensland (UQ) - Roelfsema, Christiaan (Biophysical Remote Sensing Group)
University of Queensland (UQ)
Brisbane
Queensland
4072
Australia
+61 7 336 56977

Principal investigator

School of Geography, Planning and Environmental Management, The University of Queensland (UQ) - Phinn, Stuart (Biophysical Remote Sensing Group)
University of Queensland (UQ)
Brisbane
Queensland
4072
Australia

Collaborator

School of Biological, Earth and Environmental Sciences (BEES), The University of New South Wales (UNSW) - Lyons, Mitchell
University of New South Wales (UNSW)
High Street
Kensington
New South Wales
2052
Australia
+61 2 9385 2797

Collaborator

School of Geography, Planning and Environmental Management, The University of Queensland (UQ) - Kovacs, Eva (Biophysical Remote Sensing Group)
University of Queensland (UQ)
Brisbane
Queensland
4072
Australia

Collaborator

School of Chemical Engineering, The University of Queensland (UQ) - Maxwell, Paul
University of Queensland (UQ)
Brisbane
Queensland
4072
Australia

Collaborator

Global Change Institute (GCI), The University of Queensland (UQ) - Saunders, Megan
University of Queensland (UQ)
Brisbane
Queensland
4072
Australia

Collaborator

School of Biological Sciences (SBS), The University of Queensland (UQ) - Samper-Villarreal, J (Marine Spatial Ecology Lab)
University of Queensland (UQ)
Brisbane
Queensland
4072
Australia
Status
Completed

Principal investigator

School of Geography, Planning and Environmental Management, The University of Queensland (UQ) - Roelfsema, Christiaan (Biophysical Remote Sensing Group)
University of Queensland (UQ)
Brisbane
Queensland
4072
Australia
+61 7 336 56977

Principal investigator

School of Geography, Planning and Environmental Management, The University of Queensland (UQ) - Phinn, Stuart (Biophysical Remote Sensing Group)
University of Queensland (UQ)
Brisbane
Queensland
4072
Australia
Topic category
  • Biota

Extent

N
S
E
W


Temporal extent

Time period
2004-09-17 2013-08-05
Maintenance and update frequency
Not planned

Resource format

Title
ESRI Shapefile
Date
Edition
-
Global Change Master Directory (GCMD) Earth Science Keywords Version 8.0
  • EARTH SCIENCE | BIOSPHERE | AQUATIC ECOSYSTEMS | BENTHIC HABITAT
  • EARTH SCIENCE | BIOSPHERE | AQUATIC ECOSYSTEMS | MARINE HABITAT
  • EARTH SCIENCE | BIOLOGICAL CLASSIFICATION | PLANTS | ANGIOSPERMS (FLOWERING PLANTS) | MONOCOTS | SEAGRASS
Australian and New Zealand Standard Research Classification (ANZSRC): Fields of Research
  • Environmental Management
  • Environmental Sciences not elsewhere classified
  • Marine and Estuarine Ecology (incl. Marine Ichthyology)
Keywords (Theme)
  • Dry weight seagrass biomass per square metre
  • Benthic habitat
AODN Discovery Parameter Vocabulary
  • Abundance of biota
  • Biotic taxonomic identification

Resource specific usage

Specific usage
Data supplied for use by the Seamap Australia Project.

- ()

Resource constraints

Classification
Unclassified

Resource constraints

Linkage
http://i.creativecommons.org/l/by/4.0/88x31.png

License Graphic

Title
Creative Commons Attribution 4.0 International License


>

Website
http://creativecommons.org/licenses/by/4.0/

License Text

Other constraints
Cite data as: Roelfsema, Christiaan M; Lyons, Mitchell B; Kovacs, Eva M; Maxwell, Paul; Saunders, Megan I; Samper-Villarreal, Jimena; Phinn, Stuart R (2014): Multi-temporal mapping of seagrass cover, species and biomass of the Eastern Banks, Moreton Bay, Australia, with links to shapefiles. doi:10.1594/PANGAEA.833767
Other constraints
This dataset is hosted by the Institute for Marine and Antarctic Studies (IMAS), University of Tasmania, on behalf of the University of Queensland (UQ) for the purposes of the Seamap Australia collaborative project (testing a national marine benthic habitat classification scheme).
Language
English
Character encoding
UTF8
Supplemental Information
Roelfsema, CM et al. (2014): Multi-temporal mapping of seagrass cover, species and biomass: A semi-automated object based image analysis approach. Remote Sensing of Environment, 150, 172-187, doi:10.1016/j.rse.2014.05.001

Content Information

Content type
Physical measurement
Description
For Eastern Banks seagrass BIOMASS data only
Name
Dry weight seagrass biomass per square metre

Name
Biomass

Name
Grams per square metre
Description
Seagrass percentage cover (horizontal). 'noSG' = optically deep, or, shallow sandy areas where no seagrass is present. For Eastern Banks seagrass COVER data only.

Identifier

Code
Abundance of biota
Name
Cov_Class

Identifier
http://vocab.nerc.ac.uk/collection/P06/current/UPCT
Name
Percent
Description
Dominant seagrass species type. For Eastern Banks seagrass SPECIES data only.

Identifier

Code
Biotic taxonomic identification
Name
Major

Description
Appended to original data for styling purposes for the Seamap Australia Project.
Name
Benthic habitat

Name
SM_HAB_CLS

Distribution Information

Distribution format
  • ESRI Shapefile

OnLine resource
SHAPE-ZIP

DATA ACCESS - This OGC WFS service returns the data (seagrass COVER) in Shapefile format.

OnLine resource
SHAPE-ZIP

DATA ACCESS - This OGC WFS service returns the data (seagrass SPECIES) in Shapefile format.

OnLine resource
SHAPE-ZIP

DATA ACCESS - This OGC WFS service returns the data (seagrass BIOMASS) in Shapefile format.

OnLine resource
seamap:SeamapAus_QLD_EasternBanks_seagrass_cover

MAP - Eastern Banks seagrass COVER

OnLine resource
seamap:SeamapAus_QLD_EasternBanks_seagrass_species

MAP - Eastern Banks seagrass SPECIES

OnLine resource
seamap:SeamapAus_QLD_EasternBanks_seagrass_biomass

MAP - Eastern Banks seagrass BIOMASS

OnLine resource
Original metadata record [PANGAEA catalogue]

Reference System Information

Reference system identifier
EPSG/GDA94 / Geoscience Australia Lambert (EPSG:3112)

Metadata

Metadata identifier
urn:uuid/0e01cc13-cc11-4158-beef-755fae43ad0d

Language
English
Character encoding
UTF8

Point of contact

Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS) - IMAS Data Manager
Parent metadata
  • Seamap Australia National Benthic Habitat Layer (NBHL)

Type of resource

Resource scope
Dataset
Metadata linkage
https://metadata.imas.utas.edu.au/geonetwork/srv/eng/catalog.search#/metadata/0e01cc13-cc11-4158-beef-755fae43ad0d

Point of truth URL of this metadata record

Date info (Creation)
2020-09-23T12:34:22
Date info (Revision)
2025-03-13T07:55:07

Metadata standard

Title
ISO 19115-3:2018
 
 

Overviews

Spatial extent

N
S
E
W


Keywords

Benthic habitat Dry weight seagrass biomass per square metre
AODN Discovery Parameter Vocabulary
Abundance of biota Biotic taxonomic identification
Australian and New Zealand Standard Research Classification (ANZSRC): Fields of Research
Environmental Management Environmental Sciences not elsewhere classified Marine and Estuarine Ecology (incl. Marine Ichthyology)
Global Change Master Directory (GCMD) Earth Science Keywords Version 8.0
EARTH SCIENCE | BIOLOGICAL CLASSIFICATION | PLANTS | ANGIOSPERMS (FLOWERING PLANTS) | MONOCOTS | SEAGRASS EARTH SCIENCE | BIOSPHERE | AQUATIC ECOSYSTEMS | BENTHIC HABITAT EARTH SCIENCE | BIOSPHERE | AQUATIC ECOSYSTEMS | MARINE HABITAT

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