
TY  - JOUR
A1  - Grice, A. C. 
A1  - Campbell, S. D. 
A1  - McKenzie, J. R. 
A1  - Whiteman, L. V. 
A1  - Lukitsch, B. V. 
T1  - Size-biomass relationships for Australian populations of the invasive rangeland shrub <i>Parkinsonia aculeata</i> L.
JF  - The Rangeland Journal
JO  - Rangel. J.
Y1  - 2002
VL  - 24
IS  - 2
SP  - 207
EP  - 218
KW  - Parkinsonia, weeds
UR  - https://doi.org/10.1071/RJ02011 
N2  - Parkinsonia aculeata is an invasive, introduced shrub that is found in all mainland states of Australia except Victoria. It is especially prevalent north of the tropic of Capricorn. Size-biomass relationships were established for this species using data from 167 shrubs spread across eight sites in the Northern Territory and north-eastern Queensland. Above-ground dry weight (W, kg) can be predicted from plant height (H, m), canopy diameter (D, m) or stem cross-sectional area (A, cm2) using the equations: W = 0.025 H4.47 W = 0.091 D3.64 W = 0.022 A1.61 These relationships are linear when plotted on log-log scales. Although there was a significant effect of "site" on the log-log relationships between above-ground dry weight and size variables, the amount of information lost by not using site-specific equations is relatively small. These results provide reliable methods for estimating above-ground biomass in this species, the most robust being based on measurements of stem diameter at 20 cm above ground level. 
ER  -

