Warra Site, 5-minute Point-Count Bird Survey Data, Southern Forests Experimental Forest Landscape, 2010-2011
The record contains information on the five-minute, point-count, bird survey data conducted in the Southern Forests Experimental Forest Landscape (SFEFL), Warra Site for the period between 2010 to 2011. Data such as age class of study plots, Landscape Disturbance Index (LDI), bird survey period, bird species identification details, observation distance, number of individuals, height and direction of observation at a minimum distance of 25 meters are provided.
Simple
Identification info
- Date (Creation)
- 2010-02-27
- Date (Publication)
- 2017-06-01
- Date (Revision)
- 2025-12-11
- Edition
- 1
Identifier
Publisher
Author
University of Tasmania - Wardlaw, Tim (Dr)
Churchill Avenue, Hobart, Tasmania, 7005, Australia
Hobart
Tasmania
7005
Australia
Co-author
University of Tasmania - Hingston, Andrew (Consultant Ornithologist)
Churchill Avenue, Hobart, Tasmania, 7005, Australia
Hobart
Tasmania
7005
Australia
Co-author
University of Tasmania - Grove, Simon ()
Churchill Avenue, Hobart, Tasmania, 7005, Australia
Hobart
Tasmania
7005
Australia
Co-author
University of Tasmania - Balmer, Jayne ()
Churchill Avenue, Hobart, Tasmania, 7005, Australia
Hobart
Tasmania
7005
Australia
Co-author
University of Melbourne - Read, Steve (Chief Coordinating Scientist)
500 Yarra Boulevard, Richmond Victoria 3121, Australia
Richmond
Victoria
3121
Australia
Co-author
University of Tasmania - Forster, Lynette ()
Churchill Avenue, Hobart, Tasmania, 7005, Australia
Hobart
Tasmania
7005
Australia
- Website
- https://www.tern.org.au/
- Purpose
- The data set was collected as part of a broader study examining the responses of bird, plant and beetle species to the intensity of disturbance in the landscape surrounding plots of either mature tall, wet eucalypt forest or of 25-50 year-old silvicultural regeneration following clear-fell harvesting. The study tested the null hypotheses that species persisting in patches of mature forest or re-colonising patches of silvicultural regeneration would be insensitive to the intensity of disturbance in the surrounding landscape. The study was done in 2010-2011 in the SFEFL – a 32 x 35 area anchored on the Warra Long-Term Ecological Research site and extending eastwards to the estuary of the Huon River. The surveys of the three taxonomic groups were done in fifty-six, 50 x 50 m plots – 28 each in mature eucalypt forest and silvicultural regeneration. Those plots were located to sample the measured range of average disturbance intensity (based on the mix of vegetation classes) at three scales – 0.5, 1 and 2 km, in the circular landscapes surrounding the plots. The bird data set was based on 5-minute point-count surveys of each 50 x 50 m plot-corner done on sixteen separated visits between February 2010 and March 2011.
- Credit
- We at TERN acknowledge the Traditional Owners and Custodians throughout Australia, New Zealand and all nations. We honour their profound connections to land, water, biodiversity and culture and pay our respects to their Elders past, present and emerging.
- Credit
- The project was funded by the Forest and Wood Products Australia Project PNC 142-0809: Persistence of mature forest biodiversity elements in a production forest landscape managed under a Regional Forest Agreement
- Status
- Completed
Point of contact
University of Tasmania - Wardlaw, Tim (Dr)
Churchill Avenue, Hobart, Tasmania, 7005, Australia
Churchill Avenue
Hobart
Tasmania
7005
Australia
- Topic category
-
- Biota
Extent
- Description
- The Warra Tall Eucalypt site is approximately 60 km west south-west of Hobart, Tasmania. It lies partly within the Tasmanian Wilderness World Heritage Area.
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Temporal extent
- Time period
- 2010-02-27 2011-03-03
- Maintenance and update frequency
- Not planned
- GCMD Science Keywords
- ANZSRC Fields of Research
- TERN Platform Vocabulary
- TERN Parameter Vocabulary
- QUDT Units of Measure
- GCMD Horizontal Resolution Ranges
- GCMD Temporal Resolution Ranges
- Australian Plant Name Index
- Keywords (Discipline)
-
- Bird Survey
- Point-Count Method
- Warra Site
- Southern Forests Experimental Forest Landscape
- Mature Forest
Resource constraints
- Use limitation
- The Creative Commons Attribution 4.0 International (CC BY 4.0) license allows others to copy, distribute, display, and create derivative works provided that they credit the original source and any other nominated parties. Details are provided at https://creativecommons.org/licenses/by/4.0/
- File name
- 88x31.png
- File description
- CCBy Logo from creativecommons.org
- File type
- png
- Title
- Creative Commons Attribution 4.0 International Licence
- Alternate title
- CC-BY
- Edition
- 4.0
- Access constraints
- License
- Use constraints
- Other restrictions
- Other constraints
- TERN services are provided on an "as-is" and "as available" basis. Users use any TERN services at their discretion and risk. They will be solely responsible for any damage or loss whatsoever that results from such use including use of any data obtained through TERN and any analysis performed using the TERN infrastructure. <br />Web links to and from external, third party websites should not be construed as implying any relationships with and/or endorsement of the external site or its content by TERN. <br /><br />Please advise any work or publications that use this data via the online form at https://www.tern.org.au/research-publications/#reporting
- Other constraints
- Please cite this dataset as {Author} ({PublicationYear}). {Title}. {Version, as appropriate}. Terrestrial Ecosystem Research Network. Dataset. {Identifier}.
- Other constraints
- <br>Please note: This data has been migrated “as is” from TERN’s SuperSite data portal. Minimal quality assessment has been applied to this data. Please contact the dataset authors for queries regarding the data.</br>
Resource constraints
- Classification
- Unclassified
Distribution Information
- Distribution format
-
- NetCDF
Distributor
Distributor
- OnLine resource
- WarraSite_Five-minute_Point-count_BirdSurveyData_2010-2011
Distribution Information
- Distribution format
-
- NetCDF
Distributor
Distributor
- OnLine resource
- WarraSite_Five-minute_Point-count_BirdSurveyDataDictionary
Distribution Information
- Distribution format
-
Distributor
Distributor
Terrestrial Ecosystem Research Network
Building 1019, 80 Meiers Rd, Indooroopilly, QLD, Australia, 4068
Indooroopilly
QLD
4068
Australia
- OnLine resource
- ro-crate-metadata.json
Resource lineage
- Statement
- 1) Calculation of landscape disturbance intensity: A vegetation map of the SFEFL representing the 2009 distribution of nine broad vegetation classes was produced at 1:20,000 scale from forest-types interpreted from aerial photography (Stone, 1998, Tasforests, 10: 15-32) acquired in the 2000s (Forestry Tasmania, Forest Class 2005 mapping), and converted to 50 m pixel raster format using the open-source GIS software SAGA©. Each vegetation class was assigned a disturbance rating between 1 (least disturbed) for rainforest and 10 (most disturbed) for agricultural land, and each pixel was assigned the disturbance rating corresponding to its vegetation class. Using a moving-window algorithm, the Landscape Disturbance Index (LDI) for each pixel was then calculated by averaging the disturbance rating of all pixels within a given radius of that pixel. Separate LDIs were calculated for radii of 500 m, 1 km and 2 km, to give separate LDI values for each pixel at these three landscape-scales. All LDI values were rounded down to the nearest integer and the raster maps of integer LDIs at each of the three spatial scales were overlaid to identify pixels with the same integer LDI at each of the three spatial scales to produce a “three-scale-consistent LDI” map of the SFEFL.<br></br> 2) Selection of sample plots: The three-scale consistent LDI map of the SFEFL was overlain with the mapped extent of two forest age-classes: (i) mature eucalypt forest > 110 years old and never harvested; and (ii) older (25–50 year-old) wet eucalypt forest that had been silviculturally regenerated after clear-fell harvesting. Patches of these age-classes coinciding with pixels that were three-scale consistent for LDI class were identified. All locations of scale-consistent patches of mature eucalypt forest and older silvicultural regeneration were prioritized for field validation according to the following criteria:<ul style="list-style-type: disc;"> <li>Low altitude (below 600 m);</li> <li>Forest dominated by <i>E.obliqua</i>, <i>E.regnans</i>, or a mixture of these species;</li> <li>At least 75 m from a road, vehicle track, or edge of a strongly contrasting vegetation type;</li> <li>Forest patch of an age-class was at least 150 m wide at a point where a plot could be located.</li></ul> The final experimental design comprised seven replicate 50 x 50 m square plots of mature eucalypt forest (MAT plots) at each of four LDI classes (4–7), and seven replicate plots of older silvicultural regeneration (SILV plots) at each of four LDI classes (5–8). Mature forest within highly disturbed areas with LDI class 8 was rare, as was older silvicultural regeneration within relatively undisturbed areas with LDI class 4, so these combinations were not sampled.<br></br> 3) Bird surveys: Each of the 56 plots was visited on 16 occasions during the spring to early autumn in 2009–10 and 2010–11 by the same observer (A.Hingston). The plots were surveyed using the method described in Hingston and Grove (2010, Forest Ecology & Management, 259: 459-468). Surveys were carried out between sunrise and sunset on days with fine weather and little wind (<30 km/h). Plots were visited in a different sequence on each of the 16 survey cycles, to ensure that the observations across all plots had comparable seasonal and diurnal distributions: each plot was surveyed four times before 10:00 h, four times between 10:00 h and 13:00 h, four times between 13:00 h and 16:00 h, and four times after 16:00 h. No plot was surveyed more than once per day.<br></br> Five-minute point counts were conducted at each corner of each 50 x 50 m plot, so that each plot sampling occasion comprised a twenty-minute period of observation. The identities of all birds seen or heard within 25 m horizontally of each plot corner were recorded as a presence record (because of difficulty determining the numbers of individuals in dense undergrowth and tall trees). Occurrence thus refers to the total number of separate visits on which a given species was recorded from at least one of the four corners of the plot (maximum possible = 16 per plot), treating the corners as non-independent sub-samples. If a bird was flushed from within 25 m of a plot corner as the observer approached that point, the bird was included in the data-set for that point and the 5-min survey commenced immediately. Birds that were flying more than 25 m above the vegetation were excluded from analyses unless they were aerial feeders or raptors.<br></br>
- Hierarchy level
- Dataset
Reference System Information
- Reference system identifier
- EPSG/EPSG:4326
- Reference system type
- Geodetic Geographic 2D
Metadata
- Metadata identifier
-
urn:uuid/3ca76162-8bc0-4f30-8df2-d16343b15a0c
- Title
- TERN GeoNetwork UUID
- Language
- English
- Character encoding
- UTF8
Point of contact
Type of resource
- Resource scope
- Dataset
- Metadata linkage
-
https://geonetwork.tern.org.au/geonetwork/srv/eng/catalog.search#/metadata/3ca76162-8bc0-4f30-8df2-d16343b15a0c
Point-of-truth metadata URL
- Date info (Creation)
- 2023-04-18T00:00:00.000000+00:00
- Date info (Revision)
- 2025-12-11T22:55:26.827267+00:00
Metadata standard
- Title
- ISO 19115-1:2014/AMD 1:2018 Geographic information - Metadata - Fundamentals
- Edition
- 1
Metadata standard
- Title
- ISO/TS 19115-3:2016
- Edition
- 1.0
Metadata standard
- Title
- ISO/TS 19157-2:2016
- Edition
- 1.0
- Title
- Terrestrial Ecosystem Research Network (TERN) Metadata Profile of ISO 19115-3:2016 and ISO 19157-2:2016
- Date (published)
- 2021
- Edition
- 1.0
Identifier
Overviews
Spatial extent
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W
Provided by
Associated resources
Not available