Ghannoum2010a

Report for study: Ghannoum2010a

Contact Information

Data contributor: David Tissue

Email: [email protected]

Address:

• Hawkesbury Insitute for the Environment, University of Western Sydney, Hawkesbury Campus, First Floor, Building L9, Locked Bag 1797, Penrith NSW 2751, Australia

Data source

Citation: Ghannoum O, Phillips NG, Conroy JP, Smith RA, Attard RD, Woodfield R, Logan BA, Lewis JD and Tissue DT (2010). 'Exposure to preindustrial, current and future atmospheric CO2 and temperature differentially affects growth and photosynthesis in Eucalyptus.' Global Change Biology, 16(1), pp. 303-319.

DOI: 10.1111/j.1365-2486.2009.02003.x

Abstract: To investigate if Eucalyptus species have responded to industrial-age climate change, and how they may respond to a future climate, we measured growth and physiology of fast- (E. saligna) and slow-growing (E. sideroxylon) seedlings exposed to preindustrial (290), current (400) or projected (650 yL/L) CO2 concentration ([CO2]) and to current or projected (current +4 degC) temperature. To evaluate maximum potential treatment responses, plants were grown with nonlimiting soil moisture. We found that: (1) E. sideroxylon responded more strongly to elevated [CO2] than to elevated temperature, while E. saligna responded similarly to elevated [CO2] and elevated temperature; (2) the transition from preindustrial to current [CO2] did not enhance eucalypt plant growth under ambient temperature, despite enhancing photosynthesis; (3) the transition from current to future [CO2] stimulated both photosynthesis and growth of eucalypts, independent of temperature; and (4) warming enhanced eucalypt growth, independent of future [CO2], despite not affecting photosynthesis. These results suggest large potential carbon sequestration by eucalypts in a future world, and highlight the need to evaluate how future water availability may affect such responses.

Overview of data provided

The dataset includes records for 215 individuals from 2 species belonging to 1 family(ies), presenting 1 functional type(s), growing in 1 condition(s) within 1 major type(s) of habitat, with data included for the following variables:

Variable	Label	Units	N	Min	Median	Max
latitude	Latitude	deg	215	-34	-34	-34
longitude	Longitude	deg	215	151	151	151
a.lf	Leaf area	m2	215	0.022	0.26	1.1
a.stba	Stem area at base	m2	215	0.0000075	0.000055	0.00019
h.t	Height	m	215	0.29	1.1	1.7
d.ba	Basal diameter	m	215	0.0031	0.0083	0.016
m.lf	Leaf mass	kg	215	0.0017	0.016	0.045
m.st	Total stem mass	kg	215	0.00074	0.015	0.047
m.so	Aboveground mass	kg	215	0.0036	0.032	0.091
m.rt	Total root mass	kg	215	0.0011	0.014	0.085
m.to	Total mass	kg	215	0.0046	0.048	0.15
ma.ilf	Leaf mass per area	kg m-2	215	0.027	0.052	0.19

And locally within the country:

The sites sampled are:

Location	Longitude	Latitude	Vegetation
University of Western Sydney, Richmond, NSW, Australia	150.75	-33.61

The growing conditions of sampled plants was:

Location	Grouping	growingCondition
University of Western Sydney, Richmond, NSW, Australia	CO2 = 280; Temp = Amb; Water = dry	glasshouse
University of Western Sydney, Richmond, NSW, Australia	CO2 = 400; Temp = Amb; Water = dry	glasshouse
University of Western Sydney, Richmond, NSW, Australia	CO2 = 640; Temp = Amb; Water = dry	glasshouse
University of Western Sydney, Richmond, NSW, Australia	CO2 = 280; Temp = Elv; Water = dry	glasshouse
University of Western Sydney, Richmond, NSW, Australia	CO2 = 400; Temp = Elv; Water = dry	glasshouse
University of Western Sydney, Richmond, NSW, Australia	CO2 = 640; Temp = Elv; Water = dry	glasshouse
University of Western Sydney, Richmond, NSW, Australia	CO2 = 280; Temp = Amb; Water = wet	glasshouse
University of Western Sydney, Richmond, NSW, Australia	CO2 = 400; Temp = Amb; Water = wet	glasshouse
University of Western Sydney, Richmond, NSW, Australia	CO2 = 640; Temp = Amb; Water = wet	glasshouse
University of Western Sydney, Richmond, NSW, Australia	CO2 = 280; Temp = Elv; Water = wet	glasshouse
University of Western Sydney, Richmond, NSW, Australia	CO2 = 400; Temp = Elv; Water = wet	glasshouse
University of Western Sydney, Richmond, NSW, Australia	CO2 = 640; Temp = Elv; Water = wet	glasshouse

Species sampled

Species	Family	Pft
Eucalyptus saligna	Myrtaceae	evergreen angiosperm
Eucalyptus sideroxylon	Myrtaceae	evergreen angiosperm

Methods used

Sampling strategy: Two eucalyptus species (Eucalyptus saligna and Eucalyptus sideroxylon) were grown at full field capacity under a treatment combination of ambient or elevated temperature (26/18 C or 30/22 C) and subambient, ambient or elevated CO2 (280, 400 or 640 ppm). Seedlings were grown for 150 days from planting, at which time they were subjected to a destructive harvest of all biomass.

Leaf area: All leaves were measured in a leaf area meter (LI-COR 3100, LI-COR, Inc., Lincoln, Nebr.).

Height: Height was measured as the vertical distance from the pot surface to the highest apex.

Biomass: All stems, leaves and roots were destructively harvested 150 days after planting, and dried seperately at 80degC for 48h.

Growth environment: Glasshouse.

Year collected: 2008-2009

Plots of data

This is how the study Ghannoum2010a fits in the entire dataset (grey). each colour represents a species. A legend of species names with colours is included at the end for reports with 1 < n < 20 species.