Locations and health of beachcast fragments of Posidonia in Botany Bay (NESP MaC 1.8)

Efforts to restore Posidonia seagrass meadows in NSW are reliant on collecting beachcast fragments as collection of donor material from extant beds is prohibited. However, to maximise the collection efforts it necessary to understand where to collect fragments from and what environmental conditions (e.g. wind direction, wind strength, tidal height) increase the availability of fragments and where to collect the most healthy fragments. This data set captures the abundance of fragments at 7 sites in Gamay (Botany Bay), an area of interest for restoration of Posidonia australis. It investigates how characteristics of wind (speed and direction), tidal height and swell (height, direction) influence the availability (abundance) and health (as determined by observations of necrosis) of shoots at sites throughout Botany Bay.


The Excel data workbook is comprised of two sheets:

Fragments_data sheet shows the number of P. australis fragments collected at different sites, when they were collected, and the environmental conditions at collection (see data attributes section).

Shoot_data sheet shows the proportion of necrosis of shoots attached to collected fragments.

Simple

Identification info

Date (Creation)
2022-04-11

Identifier

Title
Information and documentation - Digital object identifier system
Citation identifier
ISO 26324:2012

Code
10.25959/77RT-S809
Codespace
doi.org
Description
Digital Object Identifier (DOI)

Collaborator

Gamay Rangers - Liddell, Bryce
Credit
Research was funded by 'Wild Elements Foundation Wild Innovator Award' to Prof. Adriana Vergés.
Credit
National Environmental Science Program (NESP) Marine and Coastal Hub
Status
complete

Point of contact

University of New South Wales - Vergés, Adriana
New South Wales
Australia
ROR ID >

ORCID >

Topic category
  • Biota

Extent

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Temporal extent

Time period
2021-09-29 2021-11-07
Maintenance and update frequency
none-planned
Keywords (Theme)
  • Botany Bay
  • Gamay
  • restoration
  • seagrass
  • shoot collection
Keywords (Taxon)
  • Posidonia australis
GCMD Earth Science Keywords

Resource constraints

Other constraints
This dataset is hosted by the Institute for Marine and Antarctic Studies (IMAS), University of Tasmania, on behalf of NESP Marine and Coastal Hub Project 1.8.

Resource constraints

Classification
Unclassified

Resource constraints

Use limitation
Data was sourced from the NESP Marine and Coastal Hub – the Marine and Coastal Hub is supported through funding from the Australian Government’s National Environmental Science Program (NESP), administered by the Department of Agriculture, Water and the Environment (DAWE).

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
Liddell, B. (2023). Locations and health of beachcast fragments of Posidonia in Botany Bay [Data set]. Institute for Marine and Antarctic Studies & NESP Marine and Coastal Hub. https://doi.org/10.25959/77RT-S809
Other constraints
The data described in this record are the intellectual property of the Gamay Rangers (WA).
Language
English
Character encoding
UTF8

Content Information

Content type
Physical measurement
Name
Full or partial survey of beach

Name
Full_Partial

Name
-
Name
No. of Posidonia australis fragments collected

Name
Fragments

Name
-
Name
Length of shoreline searched

Name
Search_length

Name
m
Name
Tide_heights

Name
Tide height

Name
m
Name
Wind speed at time of survey

Name
Wind_speed

Name
km/h
Name
Direction of wind

Name
Wind_direction

Name
compass
Name
Wind speed at 3pm the day prior to survey

Name
Prior_wind_speed

Name
km/h
Name
Wind direction at 3pm the day prior to survey

Name
Prior_wind_direction

Name
km/h
Name
Height of swell

Name
Swell_height

Name
m
Name
Direction of swell

Name
Swell_direction

Name
compass
Name
Swell height at 3pm the day prior to survey

Name
Prior_swell_height

Name
m
Name
No. of shoots on a plant used to determine % necrosis

Name
Shoots

Name
-
Name
Proportion of necrosis of total shoot area measured

Name
Necrosis

Name
proportion (0.0-1.0)

Distribution Information

Distribution format
  • Microsoft Excel

OnLine resource
DATA ACCESS - Posidonia wrack data [direct download]

Resource lineage

Statement
Beach surveys were conducted to record number of Posidonia australis fragments. Surveys (n=39) were completed between 29/09/2021 and 7/11/2021. Dates and sites surveyed each day was dependent upon vessel availability and weather conditions as some sites are only accessible via vessel. The study surveyed 7 beaches in Gamay (Botany Bay). The beaches included Yarra Bay Beach, Frenchman’s Bay Beach, Congwong Beach, Brighton Le Sands Beach, Dolls Point Beach, Silver Beach, and Towra beach. As some of the beaches are large, it was not always feasible to walk the entire stretch of beach (these were termed ‘partial’ surveys). Sections of large beaches were identified as suitable to survey, taking beach access into consideration. Brighton Le Sands survey area was between (-33.969910 LAT , 151.153128 LNG) and (-33.979260 LAT , 151.149984 LNG). Silver Beach survey area was between (-34.005092 LAT , 151.217101 LNG) and (-34.008107 LAT , 151.204953 LNG). The entire beach was surveyed for all other sites. For each survey the surveyor recorded time, beach name, start and finish coordinates, as well as number of fragments found. Each fragment’s location was also recorded along with the number of shoots (leaves on each fragment) and necrosis percentage (visualised at areas of dead white tissue). Tide, wind (at time of survey and 3pm the day prior), and swell were recorded post survey. Wind speed and direction data was collected from the Bureau of Meteorology website (http://www.bom.gov.au/). Swell height and direction data was collected from Manly Hydraulics Lab website (https://www.mhl.nsw.gov.au/). Tide data sourced from ‘Willy Weather’ mobile app. All coordinates were obtained from ‘Google Earth’ on either mobile app or desktop.
Hierarchy level
Dataset

Metadata

Metadata identifier
urn:uuid/15dca9a6-766a-46d9-8b1b-f9466e724c7a

Language
English
Character encoding
UTF8

Point of contact

Institute for Marine and Antarctic Studies - Emma Flukes (NESP Marine and Coastal Hub Data Manager (Southern node))
Parent metadata

Type of resource

Resource scope
Dataset
Metadata linkage
https://metadata.imas.utas.edu.au/geonetwork/srv/eng/catalog.search#/metadata/15dca9a6-766a-46d9-8b1b-f9466e724c7a

Point of truth URL of this metadata record

Date info (Creation)
2015-05-06T11:44:25
Date info (Revision)
2025-02-02T19:46:22

Metadata standard

Title
ISO 19115-3:2018
 
 

Overviews

Spatial extent

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Keywords

Botany Bay Gamay restoration seagrass shoot collection
GCMD Earth Science Keywords
RECLAMATION/REVEGETATION/RESTORATION SEAGRASS

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Associated resources

Not available