Victorian Alpine Plot Network (ATEX): Plot Microclimate Data, Bogong High Plains, Victoria, Australia, 2004–2013

Abstract: The objective of the Australian Tundra Experiment is to assess the likely response of vegetation and invertebrates to temperature increases attained through passive warming. he Australian Tundra Experiment follows the International Tundra Experiment (ITEX) protocol (Molau & Mølgaard 1996, Jarrad et al. 2009) which focuses on the growth and phenological responses of cold adapted vascular plant species to environmental change, specifically, to an increase in summer (growing season) temperatures. In addition to monitoring vegetation responses, the experimental warming chambers were used to monitor the response of invertebrates to warming. Warming is achieved using hexagonal fibreglass open-top warming chambers (OTCs). The OTCs were set up in December 2003 at 4 sites within a 2 × 4.5 km area of the Bogong High Plains, Victoria, Australia, known as Rocky Knobs (36.90ºS, 147.27ºE). Two of the sites were established on vegetation that had been recently burnt by the 2003 bushfires. The sites are at approximately 1700 m above sea level and generally have snow cover of variable depth for 3 to 4 months each year (June-July to September-October). At each site, permanent plots of 1m2 were selected to include as many of the common vascular grassland species as possible. Treatments were then allocated at random for a total of 40 control and 40 warmed plots. This dataset contains microclimate data for a subset of plots from 6-06-2004 to 18-04-2013. Sampling method: Each data logger used four sensors: ambient temperatures at 5 cm above the ground surface, soil surface temperatures, and soil temperatures 5 cm and 10 cm below ground. The soil surface sensor was positioned in an inter-tussock gap. Temperatures were recorded hourly. On 24/10/2008, due to problems with loggers, we replaced all Hobo H8 Outdoor/Industrial 4-channel loggers with a reduced set of HOBO U12 4-Channel External Data loggers (U12-008). Because analyses of the data showed that temperatures at the two unburnt sites were similar, as were temperatures at the two burnt sites, the new loggers were put in only at ITEX1U and ITEX3B. All data were screened and missing or false readings replaced with NA. The data file contains hourly temperature readings from 06-06-2004 to 18-04-2013. Study extent: At the beginning of the experiment in 2004, 24 Hobo H8 Outdoor/Industrial 4-channel data loggers were set up next to 24 plots across the 4 Australian ITEX sites. ITEX1U and ITEX2U (the two unburnt sites) each had 8 loggers: half randomly assigned to control (un-warmed) plots and half randomly assigned to OTC (warmed) plots. The two burnt sites (ITEX3B and ITEX4B) also had loggers, but because these sites had fewer plots and because of financial constraints only 4 loggers per site were installed (2 controls and 2 OTCs per site). Project funding: The experiment was initiated with funds from an Australia Research Council Linkage Grant for the period 2003-2006. A second Linkage Grant provided funds to continue the project from 2008 to 2012. Between 2012 and 2018 this project was part of, and funded through the Long Term Ecological Research Network (LTERN) a facility within the Terrestrial Ecosystem Research Network (TERN) and supported by the Australian Government through the National Collaborative Research Infrastructure Strategy.
Type
collection
Title
Victorian Alpine Plot Network (ATEX): Plot Microclimate Data, Bogong High Plains, Victoria, Australia, 2004–2013
Alternate Title
Victorian Alpine Plot Network: Plot Micro Climate ATEX, 2004–2013
Collection Type
Dataset
Access Privileges
Long Term Ecological Research Network
DOI - Digital Object Identifier
10.25911/5c3ecb8b3efc4
Metadata Language
English
Data Language
English
Brief Description
The objective of the Australian Tundra Experiment is to assess the likely response of vegetation and invertebrates to temperature increases attained through passive warming. This dataset contains microclimate data for a subset of plots from 6-06-2004 to 18-04-2013.
Full Description
Abstract: The objective of the Australian Tundra Experiment is to assess the likely response of vegetation and invertebrates to temperature increases attained through passive warming. he Australian Tundra Experiment follows the International Tundra Experiment (ITEX) protocol (Molau & Mølgaard 1996, Jarrad et al. 2009) which focuses on the growth and phenological responses of cold adapted vascular plant species to environmental change, specifically, to an increase in summer (growing season) temperatures. In addition to monitoring vegetation responses, the experimental warming chambers were used to monitor the response of invertebrates to warming. Warming is achieved using hexagonal fibreglass open-top warming chambers (OTCs). The OTCs were set up in December 2003 at 4 sites within a 2 × 4.5 km area of the Bogong High Plains, Victoria, Australia, known as Rocky Knobs (36.90ºS, 147.27ºE). Two of the sites were established on vegetation that had been recently burnt by the 2003 bushfires. The sites are at approximately 1700 m above sea level and generally have snow cover of variable depth for 3 to 4 months each year (June-July to September-October). At each site, permanent plots of 1m2 were selected to include as many of the common vascular grassland species as possible. Treatments were then allocated at random for a total of 40 control and 40 warmed plots. This dataset contains microclimate data for a subset of plots from 6-06-2004 to 18-04-2013. Sampling method: Each data logger used four sensors: ambient temperatures at 5 cm above the ground surface, soil surface temperatures, and soil temperatures 5 cm and 10 cm below ground. The soil surface sensor was positioned in an inter-tussock gap. Temperatures were recorded hourly. On 24/10/2008, due to problems with loggers, we replaced all Hobo H8 Outdoor/Industrial 4-channel loggers with a reduced set of HOBO U12 4-Channel External Data loggers (U12-008). Because analyses of the data showed that temperatures at the two unburnt sites were similar, as were temperatures at the two burnt sites, the new loggers were put in only at ITEX1U and ITEX3B. All data were screened and missing or false readings replaced with NA. The data file contains hourly temperature readings from 06-06-2004 to 18-04-2013. Study extent: At the beginning of the experiment in 2004, 24 Hobo H8 Outdoor/Industrial 4-channel data loggers were set up next to 24 plots across the 4 Australian ITEX sites. ITEX1U and ITEX2U (the two unburnt sites) each had 8 loggers: half randomly assigned to control (un-warmed) plots and half randomly assigned to OTC (warmed) plots. The two burnt sites (ITEX3B and ITEX4B) also had loggers, but because these sites had fewer plots and because of financial constraints only 4 loggers per site were installed (2 controls and 2 OTCs per site). Project funding: The experiment was initiated with funds from an Australia Research Council Linkage Grant for the period 2003-2006. A second Linkage Grant provided funds to continue the project from 2008 to 2012. Between 2012 and 2018 this project was part of, and funded through the Long Term Ecological Research Network (LTERN) a facility within the Terrestrial Ecosystem Research Network (TERN) and supported by the Australian Government through the National Collaborative Research Infrastructure Strategy.
Methods
1
Data loggers were installed initially next to each of 24 plots. The number of loggers was reduced to 10 in 2008.
Onset Hobo H8 Outdoor Industrial four channel data loggers (Onset Computer Corporation, Bourne, MA, USA).
File Descriptions
ATEX Plot Microclimate log
CAmbient
definitionAmbient temperature (ºC) 5 cm above ground surface
interval number typereal
interval standard unitcelsius
CSurface
definitionSoil surface temperature (ºC)
interval number typereal
interval standard unitcelsius
CTemp_10cm
definitionSoil temperature (ºC) 10 cm below surface
interval number typereal
interval standard unitcelsius
CTemp_5cm
definitionSoil surface temperature (ºC)
interval number typereal
interval standard unitcelsius
Date
date time formatDD/MM/YYYY
definitionDate observation recorded
descriptionThis data file contains hourly temperature readings from 06-06-2004 to 18-04-2013.
Hour
date time formathh
definitionHour observation recorded
Plot
definitionPlot ID
nominal text definitionInteger
Site
definitionSite ID (ITEX1U, ITEX2U, ITEX3B, ITEX4B; U=unburnt, B=burnt)
nominal enumeration codes
ITEX1UITEX site 1 - unburnt
ITEX2UITEX site 2 - unburnt
ITEX3BITEX site 3 - burnt
ITEX4BITEX site 4 - burnt
nominal enumeration enforcedyes
Treatment
definitionCode identifying warming treatment
nominal enumeration codes
CTLControl
OTCOpen Top Chamber (Warmed)
nominal enumeration enforcedyes
Contact Email
belln@unimelb.edu.au; ary@unimelb.edu.au; r.woodward@unsw.edu.au; chwahren@gmail.com; james.camac@gmail.com; j.morgan@latrobe.edu.au
Contact Address
Bio21 Institute Departments of Genetics and Zoology University of Melbourne, Melbourne, Vic., 3010 Australia
Contact Phone Number
+61 3 8344 2282; +61 2 9585 6051; +61 400 972 404; +61 3 9479 2226; +61 3 9479 1230; +61 428 810 214
Principal Investigator
Ary Hoffman
Supervisors
Ary Hoffman
Collaborators
James Camac; Research Centre for Applied Alpine Ecology, La Trobe University; Henrick Wahren; Renee Woodward
Fields of Research
0602 - Ecology
Keywords
GCMD:Atmosphere > Atmospheric Temperature; GCMD:Biosphere > Terrestrial Ecosystems > Alpine/Tundra; GCMD:Land Surface > Land Temperature > Land Surface Temperature; LTERN Monitoring Theme:On plot weather; LTERN Monitoring Theme:Climate change; Victorian Alpine; ATEX; Plot Micro Climate
Type of Research Activity
Strategic basic research
Date Coverage
2004-06-06
2013
Geospatial Location
text
Bogong High Plains, Victoria, Australia
iso19139dcmiBox
northlimit = -36.88496; southlimit = -36.909953; westlimit = 147.263077; eastLimit = 147.287443
Date of data creation
2013-11-05
Year of data publication
2013
Creator(s) for Citation
Ary
Hoffman
Dick
Williams
Henrick
Wahren
James
Camac
John
Morgan
Warwick
Papst
Publisher for Citation
Long Term Ecological Research Network (LTERN), ANU Data Commons, The Australian National University
Other Related Identifiers
MorphoId:datalibrarian.67; PackageId:58
Access Rights Type
Open
Rights held in and over the data
Creative Commons Licence (CC BY- Attribution) is assigned to this data. Details of the licence can be found at https://creativecommons.org/licenses/by/4.0/
Licence Type
CC-BY - Attribution (Version 4)
Retention Period
Indefinitely
Data Management Plan
No
Status: Published
Published to:
  • Australian National University
  • Australian National Data Service
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