Data

Warra Tall Eucalypt Coarse Woody Debris Data

Terrestrial Ecosystem Research Network
Wardlaw, Tim
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=http://geonetwork.tern.org.au/geonetwork/srv/eng/catalog.search#/metadata/8e0a80f2-86d7-4c49-a77c-4f10e1249537&rft.title=Warra Tall Eucalypt Coarse Woody Debris Data&rft.identifier=http://geonetwork.tern.org.au/geonetwork/srv/eng/catalog.search#/metadata/8e0a80f2-86d7-4c49-a77c-4f10e1249537&rft.publisher=Terrestrial Ecosystem Research Network&rft.description=This data contains diameter, length volume, biomass and carbon measurements of all coarse woody debris pieces within the core 1 ha plot at the Warra Tall Eucalypt site in 2015.Coarse woody debris sampling: Coarse woody debris (CWD) was sampled at the Warra Tall Eucalypt site in 2015. Sampling was split into two separate events, with different methods based on the diameter range of the CWD pieces (thin end diameter of CWD either > 40 cm or < 40 cm). For all pieces of coarse woody debris within size specifications (small end diameter > 40 cm, length > 1.0 m) within the Core 1 ha plot were measured. The 40 cm small-end diameter threshold was based on the work of Sohn et al. (2013) in similar wet E. obliqua forests in the Warra Tall environment. The diameter of the vertical and horizontal axis of both the large and small ends of each piece was measured using a retractable carpenters tape. The small end was set at the 40 cm diameter threshold and any log sections of smaller diameter beyond this 40 cm cut-off point were not measured. The length of the log section between the large and small diameter measurement points was measured using a tape and assigned a decay class based on the decay classification described in Grove et al. (2009). Where necessary, logs were divided into two or more sections (each with separate diameter and length measurements) such that each log section was a homogenous decay class. Logs were also divided into separate sections at each point of bifurcation. The location of each end of each log (or log section) was measured as a perpendicular distance to the nearest boundary of the 20 x 20 m sub-plot in which that log section occurred. These x-y distances to the sub-plot boundary were then converted to the x – y co-ordinates of the 1 ha plot. Where possible the taxon of the tree species generating the log was determined. All pieces of coarse woody debris < 40 cm diameter (at point of intersection with transect) that were intersected by transects were measured. Four, 50-metre transects were laid-out within the Core 1 ha plot using a measuring tape. The start and end points of the transects are given in the x-y co-ordinate system of the 1 ha plot with (0, 0) corresponding to the SW corner of the plot. The x co-ordinates run east-west and y co-ordinates run north-south. Transect 1 commenced at point (0, 20) and ended at (50, 20). Transect 2 commenced at point (80, 0) and ended at (80, 50). Transect 3 commenced at point (100, 80) and ended at (50, 80). Transect 4 commenced at point (20, 100) and ended at (20, 50). The diameter of the CWD piece at the point of intersection by transect was measured in one of two ways: a diameter tape for suspended CWD, or measurement of the cross-sectional diameter of the vertical and horizontal axes using a retractable builders measuring tape. Each piece of CWD intersected by transects was assigned a decay class based on the decay classification described in Grove et al. (2009); was attributed as being either a log or branch and where, possible, the taxon of the parent tree species was identified. Calculation of coarse woody debris volume, biomass and carbon For the CWD pieces > 40 cm diameter: The vertical and horizontal axis diameter measurements of each end of each log or log section were converted to a simple average diameter. The volume of the log or log section was calculated using Smalian’s formula: Volume = length * ((Diameter thick end + Diameter thin end )/2). Biomass was calculated as the product of volume and wood density. The wood density was determined by the assigned decay class of the log using values for E. obliqua given in Grove et al. (2009). The weight of carbon in the log was calculated as the product of the log biomass and the carbon concentration of the log (assumed to be 50%). For the CWD pieces < 40 cm diameter: The contribution to total volume per hectare made by each piece of CWD was estimated using the formula developed by van Wagner (1968): volume = Dia^2 * 3.1415^2 /8 * L Where: L is the horizontal transect length (after correcting for average slope of each 50 m transect) and Dia is the diameter of the piece of CWD. Biomass was calculated as the product of volume and wood density. The wood density was determined by the assigned decay class of the log using values for E. obliqua given in Grove et al. (2009). The weight of carbon in the log was calculated as the product of the log biomass and the carbon concentration of the log (assumed to be 50%).&rft.creator=Wardlaw, Tim &rft.date=2022&rft.edition=1&rft.relation=https://eprints.utas.edu.au/22575/&rft.relation=https://doi.org/10.1016/j.foreco.2008.11.006&rft.relation=https://doi.org/10.1093/forestscience/14.1.20&rft.coverage=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.&rft.coverage=northlimit=-43.085278; southlimit=-43.085278; westlimit=146.6556; eastLimit=146.6556; projection=EPSG:4326&rft_rights=Creative Commons Attribution 4.0 International Licence http://creativecommons.org/licenses/by/4.0&rft_rights=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&rft_rights=Please cite this dataset as {Author} ({PublicationYear}). {Title}. {Version, as appropriate}. Terrestrial Ecosystem Research Network. Dataset. {Identifier}.&rft_subject=biota&rft_subject=environment&rft_subject=BIOMASS&rft_subject=EARTH SCIENCE&rft_subject=BIOSPHERE&rft_subject=VEGETATION&rft_subject=BIOMASS DYNAMICS&rft_subject=ECOLOGICAL DYNAMICS&rft_subject=ECOSYSTEM FUNCTIONS&rft_subject=DECOMPOSITION&rft_subject=NUTRIENT CYCLING&rft_subject=ECOLOGY&rft_subject=BIOLOGICAL SCIENCES&rft_subject=PLANT BIOLOGY&rft_subject=FORESTRY SCIENCES&rft_subject=AGRICULTURAL AND VETERINARY SCIENCES&rft_subject=Forestry Biomass and Bioproducts&rft_subject=Forest ecosystems&rft_subject=Ecological Physiology&rft_subject=Carbon Sequestration Science&rft_subject=ENVIRONMENTAL SCIENCES&rft_subject=SOIL SCIENCES&rft_subject=Warra Tall Eucalypt&rft_subject=Warra Tall Eucalypt, core1ha&rft_subject=wood piece ID (Unitless)&rft_subject=Unitless&rft_subject=wood piece section (Unitless)&rft_subject=coarse woody debris type (Unitless)&rft_subject=thick end coarse woody debris horizontal axis diameter (Centimetre)&rft_subject=Centimetre&rft_subject=thin end coarse woody debris horizontal axis diameter (Centimetre)&rft_subject=thick end coarse woody debris vertical axis diameter (Centimetre)&rft_subject=thin end coarse woody debris vertical axis diameter (Centimetre)&rft_subject=coarse woody debris length (Metre)&rft_subject=Metre&rft_subject=coarse woody debris void space (Percent)&rft_subject=Percent&rft_subject=dead wood position (Unitless)&rft_subject=coarse woody debris decay class (Unitless)&rft_subject=coarse woody debris wood density (Gram Per Cubic Centimetre)&rft_subject=Gram Per Cubic Centimetre&rft_subject=coarse woody debris volume (Cubic Metre)&rft_subject=Cubic Metre&rft_subject=coarse woody debris biomass (Tonne)&rft_subject=Tonne&rft_subject=coarse woody debris carbon (Tonne)&rft_subject=coarse woody debris diameter at transect intersect (Centimetre)&rft_subject=total stand coarse woody debris volume (Cubic Meter per Hectare)&rft_subject=Cubic Meter per Hectare&rft_subject=total stand coarse woody debris biomass (tonne per hectare)&rft_subject=tonne per hectare&rft_subject=stand coarse woody debris carbon (tonne per hectare)&rft_subject=100 meters - < 250 meters&rft_subject=quinquennial&rft_subject=Forest&rft_subject=Vegetation&rft_subject=Biomass&rft_subject=Carbon&rft_subject=Coarse Woody Debris&rft.type=dataset&rft.language=English Access the data

Licence & Rights:

Open Licence view details
CC-BY

Creative Commons Attribution 4.0 International Licence
http://creativecommons.org/licenses/by/4.0

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.
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.

Please advise any work or publications that use this data via the online form at https://www.tern.org.au/research-publications/#reporting

Please cite this dataset as {Author} ({PublicationYear}). {Title}. {Version, as appropriate}. Terrestrial Ecosystem Research Network. Dataset. {Identifier}.

Access:

Open view details

unclassified

Contact Information

Street Address:
Terrestrial Ecosystem Research Network
Building 1019, 80 Meiers Rd
QLD 4068
Australia
Ph: +61 7 3365 9097

esupport@tern.org.au

Brief description

This data contains diameter, length volume, biomass and carbon measurements of all coarse woody debris pieces within the core 1 ha plot at the Warra Tall Eucalypt site in 2015.

Lineage

Coarse woody debris sampling:
Coarse woody debris (CWD) was sampled at the Warra Tall Eucalypt site in 2015. Sampling was split into two separate events, with different methods based on the diameter range of the CWD pieces (thin end diameter of CWD either > 40 cm or < 40 cm). For all pieces of coarse woody debris within size specifications (small end diameter > 40 cm, length > 1.0 m) within the Core 1 ha plot were measured. The 40 cm small-end diameter threshold was based on the work of Sohn et al. (2013) in similar wet E. obliqua forests in the Warra Tall environment. The diameter of the vertical and horizontal axis of both the large and small ends of each piece was measured using a retractable carpenters tape. The small end was set at the 40 cm diameter threshold and any log sections of smaller diameter beyond this 40 cm cut-off point were not measured. The length of the log section between the large and small diameter measurement points was measured using a tape and assigned a decay class based on the decay classification described in Grove et al. (2009). Where necessary, logs were divided into two or more sections (each with separate diameter and length measurements) such that each log section was a homogenous decay class. Logs were also divided into separate sections at each point of bifurcation. The location of each end of each log (or log section) was measured as a perpendicular distance to the nearest boundary of the 20 x 20 m sub-plot in which that log section occurred. These x-y distances to the sub-plot boundary were then converted to the x – y co-ordinates of the 1 ha plot. Where possible the taxon of the tree species generating the log was determined.
All pieces of coarse woody debris < 40 cm diameter (at point of intersection with transect) that were intersected by transects were measured. Four, 50-metre transects were laid-out within the Core 1 ha plot using a measuring tape. The start and end points of the transects are given in the x-y co-ordinate system of the 1 ha plot with (0, 0) corresponding to the SW corner of the plot. The x co-ordinates run east-west and y co-ordinates run north-south. Transect 1 commenced at point (0, 20) and ended at (50, 20). Transect 2 commenced at point (80, 0) and ended at (80, 50). Transect 3 commenced at point (100, 80) and ended at (50, 80). Transect 4 commenced at point (20, 100) and ended at (20, 50). The diameter of the CWD piece at the point of intersection by transect was measured in one of two ways: a diameter tape for suspended CWD, or measurement of the cross-sectional diameter of the vertical and horizontal axes using a retractable builders measuring tape. Each piece of CWD intersected by transects was assigned a decay class based on the decay classification described in Grove et al. (2009); was attributed as being either a log or branch and where, possible, the taxon of the parent tree species was identified.
Calculation of coarse woody debris volume, biomass and carbon
For the CWD pieces > 40 cm diameter: The vertical and horizontal axis diameter measurements of each end of each log or log section were converted to a simple average diameter. The volume of the log or log section was calculated using Smalian’s formula: Volume = length * ((Diameter thick end + Diameter thin end )/2). Biomass was calculated as the product of volume and wood density. The wood density was determined by the assigned decay class of the log using values for E. obliqua given in Grove et al. (2009). The weight of carbon in the log was calculated as the product of the log biomass and the carbon concentration of the log (assumed to be 50%).
For the CWD pieces < 40 cm diameter: The contribution to total volume per hectare made by each piece of CWD was estimated using the formula developed by van Wagner (1968): volume = Dia^2 * 3.1415^2 /8 * L Where: L is the horizontal transect length (after correcting for average slope of each 50 m transect) and Dia is the diameter of the piece of CWD. Biomass was calculated as the product of volume and wood density. The wood density was determined by the assigned decay class of the log using values for E. obliqua given in Grove et al. (2009). The weight of carbon in the log was calculated as the product of the log biomass and the carbon concentration of the log (assumed to be 50%).

Notes

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.
Purpose
Coarse woody debris (CWD) is a fundamental component of forested ecosystems, providing habitat for organisms and play an important role in nutrient cycling and carbon storage.

Created: 2015-06-03

Issued: 2022-09-20

Modified: 2014-07-14

Data time period: 2015-06-03

Click to explore relationships graph

146.6556,-43.085278

146.6556,-43.085278

text: 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.

Subjects
100 meters - < 250 meters | Agricultural and Veterinary Sciences | Biological Sciences | BIOMASS | BIOMASS DYNAMICS | BIOSPHERE | Biomass | Carbon | Carbon Sequestration Science | Centimetre | Coarse Woody Debris | Cubic Meter per Hectare | Cubic Metre | DECOMPOSITION | EARTH SCIENCE | ECOLOGICAL DYNAMICS | Ecology | ECOSYSTEM FUNCTIONS | Environmental Sciences | Ecological Physiology | Forestry Sciences | Forest | Forest ecosystems | Forestry Biomass and Bioproducts | Gram Per Cubic Centimetre | Metre | NUTRIENT CYCLING | Plant Biology | Percent | Soil Sciences | Tonne | Unitless | VEGETATION | Vegetation | Warra Tall Eucalypt | Warra Tall Eucalypt, core1ha | biota | coarse woody debris biomass (Tonne) | coarse woody debris carbon (Tonne) | coarse woody debris decay class (Unitless) | coarse woody debris diameter at transect intersect (Centimetre) | coarse woody debris length (Metre) | coarse woody debris type (Unitless) | coarse woody debris void space (Percent) | coarse woody debris volume (Cubic Metre) | coarse woody debris wood density (Gram Per Cubic Centimetre) | dead wood position (Unitless) | environment | quinquennial | stand coarse woody debris carbon (tonne per hectare) | thick end coarse woody debris horizontal axis diameter (Centimetre) | thick end coarse woody debris vertical axis diameter (Centimetre) | thin end coarse woody debris horizontal axis diameter (Centimetre) | thin end coarse woody debris vertical axis diameter (Centimetre) | tonne per hectare | total stand coarse woody debris biomass (tonne per hectare) | total stand coarse woody debris volume (Cubic Meter per Hectare) | wood piece ID (Unitless) | wood piece section (Unitless) |

User Contributed Tags    

Login to tag this record with meaningful keywords to make it easier to discover