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Ecophysiological status of different growth stage of understorey Acacia leiocalyx and Acacia disparrima in an Australian dry sclerophyll forest subjected to prescribed burning

journal contribution
posted on 21.01.2020, 00:00 by Shahla Hosseini Bai, F Sun, Z Xu, TJ Blumfield
Purpose: Understorey Acacia spp. plays an important role in post-fire restoration because these understorey plants are tolerant to stress conditions. We investigated how the ecophysiological status of two species of understorey, Acacia leiocalyx and Acacia disparrima, varied depending on the plant growth stage after prescribed burning. Materials and methods: Plants were grouped in different size classes, namely seedlings, small and medium sizes, and physiological variables such as foliar gas exchange, water use efficiency and light dependency were measured at two experimental sites subjected to prescribed burning. Results and discussion: A. leiocalyx showed higher symbiotic N2 fixation and photosynthetic capacity compared to A. disparrima regardless of plant-size classes at both experimental sites. This could explain the greater relative growth rate of A. leiocalyx than that of A. disparrima. However, A. disparrima is more tolerant to shady conditions than A. leiocalyx. Conclusions: This finding may be an indication of how well these two species recover after fire, although A. leiocalyx may have faster regrowth, as it is fixing more N. © 2013 Springer-Verlag Berlin Heidelberg.

Funding

Category 3 - Industry and Other Research Income

History

Volume

13

Start Page

1378

End Page

1385

Number of Pages

8

eISSN

1614-7480

ISSN

1439-0108

Publisher

Springer, Germany

Peer Reviewed

Yes

Open Access

No

Acceptance Date

24/06/2013

External Author Affiliations

Shenzhen Academy of Environmental Sciences, China; Griffith University

Era Eligible

Yes

Journal

Journal of Soils and Sediments

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