Title

WAMSI 2 - Dredging Node - Project 5.3 - Natural Dynamics [dataset]

Author Identifiers

Kathryn McMahon

ORCID: 0000-0003-4355-6247

Paul S. Lavery

ORCID: 0000-0001-5162-273X

Collection Type

Dataset

Upload Date

2017

School or Research Centre

School of Science

Contact

This dataset is currently embargoed. To request for access, kindly contact Mat Vanderklift (CSIRO Oceans & Atmosphere) (Mat.Vanderklift@csiro.au)

Funders

Western Australian Marine Science Institution (WAMSI) project funded by Western Australian State Government and research partners.

Description

The Theme 5.3 study was undertaken to improve our understanding of the spatial and temporal patterns in seagrass composition, abundance and reproductive phenology in the Pilbara region. Key environmental parameters, especially light, that influence seagrass survival and can be altered by dredging were also characterised.

From August 2013 to March 2015 (18 months), surveys of seagrass abundance were undertaken in the Exmouth Gulf region. The locations surveyed (South Muiron Island, Bundegi and Exmouth Gulf) encompassed a range in water clarity from clear to turbid. Less frequent surveys were undertaken at other locations in the Pilbara: Thevenard Island, Rosemary Island and Balla. Measurements of seagrass abundance were also obtained from monitoring conducted as part of the dredging and dredge-spoil management plan for Chevron Australia’s Wheatstone Liquefied Natural Gas (LNG) Project.

During each survey measurements were made in the field, photographs were taken or samples were collected in order to measure the following variables:

1. percentage cover of seagrass and other benthos;

2. above- and below-ground biomass, shoot density, leaf length, leaf width and number of flowers;

3. density of seagrass seeds;

4. sediment grain size;

5. stable isotope ratios (13C and 15N) of seagrass leaf tissue; and

6. water quality (light, conductivity, temperature, salinity, nutrients, suspended particulate matter and chlorophyll).

At each site the following activities were conducted:

1. Photographic transects

2. Cores

3. Stable isotope analysis;

4. Conductivity, Temperature and Depth recorder with a Licor 192SA PAR sensor

5. Water samples

Geographic bounding :

North bound: -21.60000, West bound: 114.10000, East bound: 114.40000, South bound: -22.30000

FoR Codes

0405

Data URLs

Access CSIRO record here

Research Activity Description

Western Australian Marine Science Institution: Dredging Science Program - http://www.wamsi.org.au/research-site/primary-producer-response-dredging

Start of data collection time period

2013

End of data collection time period

2015

Language

English

Codes

utf8: 8-bit variable size UCS Transfer Format, based on ISO/IEC 10646

File Format(s)

Excel spreadsheet (.xlsx)

Viewing Instructions

Requires use of Microsoft Excel software.

File can be viewed using Excel Viewer. Click here to download Excel Viewer.

Creative Commons License

Creative Commons Attribution 4.0 License
This work is licensed under a Creative Commons Attribution 4.0 License.

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