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Ecological applications

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    The seasonal dynamic reference cover method product compares the current ground cover level of each pixel to a reference pixel based on the historical timeseries and is available for Queensland from 1987 to present. It is created using a modified version of the dynamic reference cover method developed by <a href="https://doi.org/10.1016/j.rse.2012.02.021">Bastin et al (2012) </a>. This approach calculates a minimum ground cover image over all years to identify locations of most persistent ground cover in years with the lowest rainfall, then uses a moving window approach to calculate the difference between the window's central pixel and its surrounding reference pixels. The output is a difference image between the cover amount of a pixel's reference pixels and the actual cover at that pixel for the season being analysed. Negative values indicate pixels which have less cover than the reference pixels.<br> The main differences between this method and the original method are that this method uses seasonal fractional ground cover rather than the preceding ground cover index (GCI) and this method excludes cleared areas and certain landforms (undulating slopes), which are considered unsuitable for use as reference pixels.<br> This product is based upon the JRSRP Fractional Cover 3.0 algorithm.

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    Terrestrial laser scans were acquired in native Eucalypt Open Forest (dry sclerophyll Box-Ironbark forest) in Victoria, Australia. Two plots (RUSH06 and RUSH07) with a 40 m radius were established in Rushworth forest and partially harvested in May 2012 to acquire accurate estimates of above-ground biomass. The main tree species in these plots were Eucalyptus leucoxylon, Eucalyptus microcarpa and Eucalyptus tricarpa. Single trees were extracted from the TLS data and quantitative structure models were used to estimate the tree volume directly from the point cloud data. Above-ground biomass (AGB) was inferred from the derived volumes and basic wood density information, and compared with estimates of above-ground biomass derived from allometric equations and destructive sampling. See <a href="https://doi.org/10.1111/2041-210X.12301">Calders et al. (2014)</a> and <a href="https://apo.org.au/node/234726">Murphy et al. (2014)</a> for further information.

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    <p>The monthly blended ground cover product is a spatially explicit raster product that shows the proportion of bare ground, green and non-green ground cover at medium resolution (30&nbsp;m per-pixel) for each calendar month across Queensland from 2017 to present. It is derived directly from both the Landsat-based fractional cover product and the Sentinel-2-based fractional cover product by Queensland's Remote Sensing Centre.<br> A 3 band (byte) image is produced:<br> band 1 - bare ground fraction (in percent),<br> band 2 - green vegetation fraction (in percent),<br> band 3 - non-green vegetation fraction (in percent).<br> The no data value is 255.</p> <p>This product is derived from the <a href="https://portal.tern.org.au/metadata/TERN/8d3c8b36-b4f1-420f-a3f4-824ab70fb367 ">Monthly blended fractional cover - Landsat and Sentinel-2, JRSRP algorithm Version 3.0, Queensland coverage</a></p>

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    Wood block decomposition assessment at the Wombat Stringybark Eucalypt site is part of a global program looking at the influence of microbes and invertebrates on wood decay. A common protocol was developed exposing small (~400 cm3) pieces of a wood-substrate (untreated Pinus radiata) to the environment excluding and not-excluding macroinvertebrates (e.g. termites) by the use of a plastic mesh.

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    Wood block decomposition assessment at the Daintree Rainforest, Cape Tribulation site is part of a global program looking at the influence of microbes and invertebrates on wood decay. A common protocol was developed exposing small (~400 cm3) pieces of a wood-substrate (untreated Pinus radiata) to the environment excluding and not-excluding macroinvertebrates (e.g. termites) by the use of a plastic mesh.

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    Wood block decomposition assessment at the Cumberland Plain site is part of a global program looking at the influence of microbes and invertebrates on wood decay. A common protocol was developed exposing small (~400 cm3) pieces of a wood-substrate (untreated Pinus radiata) to the environment excluding and not-excluding macroinvertebrates (e.g. termites) by the use of a plastic mesh.

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    Wood block decomposition assessment at the Litchfield Savanna site is part of a global program looking at the influence of microbes and invertebrates on wood decay. A common protocol was developed exposing small (~400 cm3) pieces of a wood-substrate (untreated Pinus radiata) to the environment excluding and not-excluding macroinvertebrates (e.g. termites) by the use of a plastic mesh.

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    The project is focused on the topic, 'enhanced heat tolerance of virus-infected aphids lead to niche expansion and reduced interspecific competition. The two aphid species studied are <i>Rhopalosiphum padi</i> and <i>Rhopalosiphum maidis</i>. The project had some of the following objectives: [1] Spatial distribution of two aphid species on the host plants [2] Upper thermal limits of two aphid species. [3] Effects of the viral infection on the host plant thermal profile. [4] Levels of expression of heat shock protein genes of virus-free and viruliferous aphids. [5] Locomotor capacity of aphids, effects of viruses on the locomotor capacity. [6] Effects of viral infection, temperature, and competition on the lifespan and fecundity of <i>R. padi</i> [7] Effects of viral infection, temperature, and competition on the lifespan and fecundity of <i>R. maidis</i> [8] Temperature of acrylic tubes used on aphid experiments. [9] Thermal lethal dose 50 of virus-free and viruliferous aphids [10] Thermal preference of virus-free and viruliferous aphids. This information can be very useful for ecologist working on insect population dynamics as well as physiologist and eco-physiologists doing meta-analyses of expression of heat shock protein genes induced by symbionts.

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    Field spectroradiometer measurements have been collected at several locations across Australia (formally known as the AusCover Supersites) to relate field based measurements to satellite data products, such as Landsat and MODIS NBAR products. Collected in collaboration with multiple government and research-based institutions.

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    This data contains leaf area index calculated from Digital Hemispheric Photography images taken at the core 1-ha plot within the Whroo Dry Eucalypt site between 2014 - 2016.