The data set contains information on leaf ¹³C isotope composition studied on three species, <i>Maireana sedifolia</i>, <i>Ptilotus obovatus</i> and <i>Eremophila scoparia</i> from the core 1 ha Salmon Gum plot at the Credo, Great Western Woodland site.

The dataset contains maps of total % C₃ and C₄ plant cover, proportional C₃ and C₄ vegetation (relative to combined C₃ and C₄ cover), and vegetation &delta;¹³C isoscape (stable carbon isotope values) across Australia. Data are centered on year 2015. We used vegetation and land-use rasters to categorize grid-cells (100 m²) into woody (C₃), native herbaceous (C₃ and C₄), and herbaceous cropland (C₃ and C₄) cover. TERN Ecosystem Surveillance field surveys and environmental factors were regressed to predict native C₄ herbaceous cover. These layers were combined and a &delta;¹³C mixing model was used to calculate site-averaged &delta;¹³C values.

The record contains information on the leaf level physiology, chemistry and structural traits data measured from dominant tree and shrub species from the Great Western Woodlands Site in 2013. Data on leaf level physiology parameters associated with light saturated photosynthesis and intercellular carbon dioxide curves (AC_i), and leaf dry mass per leaf area trait (LMA) and leaf nitrogen and phosphorous content are provided.