TERN Geospatial Catalogue
Temporal activity of wolf spiders and dunnarts in the Simpson Desert
The lesser hairy-footed dunnart (<i>Sminthopsis youngsoni, Dasyuridae</i>) is a generalist marsupial insectivore in arid Australia, but consumes wolf spiders (<i>Lycosa spp., Lycosidae</i>) disproportionately often relative to their availability. This project tested the hypothesis that this disproportionate predation is a product of frequent encounter rates between the interactants due to high overlap in their diets and use of space and time. This data set focuses on overlap in the diel acttivity patterns wolf spiders (<i>Lycosa spp.</i>) and the lesser hairy-footed dunnart (<i>Sminthopsis youngsoni</i>) in the Simpson Desert, south-western Queensland Australia. To quantify the temporal activity of lycosids, spotlight surveys were conducted in October 2016 every hour between dusk (19:30 h) and dawn (05:30 h) over three nights. Additionally, remote camera traps were deployed to further quantify patterns in the activity of lycosids and S. youngsoni. Twenty-four Reconyx PC800 HyperfireTM cameras were deployed on 7th July 2016 at Main Camp and left until 12th October 2016 (98 days, or 2352 h of deployment). Images were tagged with camera location, position, angle, camera ID number, species and confidence and date and time data were extracted from each image. This data was used to identify mean activity times for each species (with confidence intervals) and to assess overlap in nocturnal activity patterns between lycosids and S. youngsoni, and thus the potential for competition and predation using the Overlap v 0.2.7 package in R. This data presents a useful example for investigating how the 'Overlap' package works and the benefits it provides.
Simple
Identification info
- Date (Creation)
- 2016-10-20
- Date (Publication)
- 2017-11-23
- Date (Revision)
- 2014-07-14
- Edition
- 1
Identifier
Publisher
Author
University of Sydney - Potter, Tamara ()
City Rd, Camperdown, NSW, 2006, Australia
Camperdown
NSW
2006
Australia
Co-author
University of Sydney - Greenville, Aaron ()
City Rd, Camperdown, NSW, 2006, Australia
Camperdown
NSW
2006
Australia
Co-author
University of Sydney - Dickman, Chris (Professor in Terrestrial Ecology)
City Rd, Camperdown, NSW, 2006, Australia
Camperdown
NSW
2006
Australia
- Website
- https://www.tern.org.au/
- Purpose
- The lesser hairy-footed dunnart (<i>Sminthopsis youngsoni</i>) is a common generalist insectivore in arid Australia that consumes wolf spiders (<i>Lycosa spp.</i>) disproportionately often relative to their availability. This study aimed to uncover the underlying mechanisms that drive this observed pattern of selective predation.
- 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.
- Status
- Completed
Point of contact
University of Sydney - Potter, Tamara ()
City Rd, Camperdown, NSW, 2006, Australia
City Rd
Camperdown
NSW
2006
Australia
- Topic category
-
- Biota
Extent
- Description
- Data was collected around Main Camp, Ethabuka Reserve, north-western Simpson Desert, Queensland IBRA region: Simpson Desert (Simpson Strzelecki Dunefields)
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Temporal extent
- Time period
- 2016-07-18 2016-10-20
- Maintenance and update frequency
- Not planned
- GCMD Science Keywords
- ANZSRC Fields of Research
- TERN Instrument Vocabulary
- TERN Parameter Vocabulary
- GCMD Horizontal Resolution Ranges
- GCMD Temporal Resolution Ranges
- Australian Faunal Directory
- Keywords (Discipline)
-
- Arid ecology
- Predator-Prey Interactions
- Wold Spiders
- Lesser hairy-footed Dunnart
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
- (C)2017 University of Sydney. Rights owned by University of Sydney.
Resource constraints
- Classification
- Unclassified
Distribution Information
Distributor
Distributor
- OnLine resource
- Potter_Temporal_activity
Distribution Information
Distributor
Distributor
- OnLine resource
- AEKOS-species_list
Distribution Information
Distributor
Distributor
- OnLine resource
- AEKOS_species_common_names
Resource lineage
- Statement
- Camera traps and spotlighting: [1] Spotlighting to quantify the temporal activity of lycosids: spotlight surveys were conducted in October 2016 every hour between dusk (19:30 h) and dawn (05:30 h) over three nights. This yielded 33 transect surveys. Each hour, a 100 m transect was walked for 10 min using a spotlight (Fenix TK35, 960 lumens) to detect lycosid eye shine. For consistency, each survey was conducted along the same 100 m transect, which was marked by a row of six remote cameras. A transect was used rather than a random walk to ensure varied microhabitats were surveyed (including spinifex hummocks and open sand) and to reduce bias towards open areas where walking was easier and spiders more easily detected. Numbers of spiders observed in each 10-minute survey were tallied. [2] Camera Traps Remote camera traps were deployed to further quantify patterns in the activity of both spiders and dunnarts. Twenty-four Reconyx PC800 HyperfireTM cameras (Reconyx, Inc., Holmen, WI, USA) were deployed on 7th July 2016 at Main Camp and left until 12th October 2016 (98 days, or 2352 h of deployment). Cameras were placed on dune crests and in swales, as well as in burnt and unburnt areas, to get a complete representation of activity across the entire dune system. Based on pilot trials, half the cameras were positioned vertically and half angled at ~45 to the ground. Cameras angled at 45 had a greater field of view and were more likely to detect <i>S. youngsoni</i>, while those facing down had more chance of detecting lycosids. Cameras were placed along four north-south facing 100 m transects with six cameras per transect each spaced 20 m apart. Cameras were attached to metal posts ~50 cm above the ground surface. To increase lycosid capture success, cameras were set to take both time-lapse and motion-triggered images. Settings were as follows: time-lapse single image every 5 min between 19:00 h and 07:00 h, and motion-trigger single image with no delay between triggers (i.e., rapid-fire) and sensitivity set as high to maximise detection rate. [3] Analyses: Each image was tagged with location (burnt or unburnt), position (crest or swale), camera angle (angled or vertical), camera ID number, species and confidence level ('possible', 'probable' and 'definite'), and the tags written to the EXIF data of each file using the multi-format graphics program XnView MP v 0.83. EXIF data, including date, time and tagged keywords were extracted from each image and written to an Excel file using the command line package exiftool. To ensure independence, multiple photographs likely to be of the same individual (photographs in sequence < 2 min apart) were removed prior to analysis. To determine activity patterns of lycosids and <i>S. youngsoni</i>, photographs were pooled across all cameras, habitat types, locations and positions. Images with ID confidence tags of definite and probable were used for analyses (51 images of S. youngsoni and 304 images of lycosids).
- Hierarchy level
- Dataset
Reference System Information
- Reference system identifier
- EPSG/EPSG:3577
- Reference system type
- Geodetic Geographic 2D
Metadata
- Metadata identifier
- urn:uuid/95067729-31ec-48a8-8329-0bcb243b97dd
- Language
- English
- Character encoding
- UTF8
Point of contact
- Title
- Direct observations of foraging wolf spiders and dunnarts
Identifier
- Codespace
- https://geonetwork.tern.org.au/geonetwork/srv/eng/catalog.search#/metadata/
- Description
- Parent Metadata Record
Type of resource
- Resource scope
- Dataset
- Metadata linkage
-
https://geonetwork.tern.org.au/geonetwork/srv/eng/catalog.search#/metadata/95067729-31ec-48a8-8329-0bcb243b97dd
Point-of-truth metadata URL
- Date info (Creation)
- 2022-11-06T00:00:00
- Date info (Revision)
- 2022-11-07T00:39:12
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