CSIRO Publishing blank image blank image blank image blank imageBooksblank image blank image blank image blank imageJournalsblank image blank image blank image blank imageAbout Usblank image blank image blank image blank imageShopping Cartblank image blank image blank image You are here: Journals > Australian Journal of Botany   
Australian Journal of Botany
Journal Banner
  Southern Hemisphere Botanical Ecosystems
 
blank image Search
 
blank image blank image
blank image
 
  Advanced Search
   

Journal Home
About the Journal
Editorial Board
Contacts
Content
Online Early
Current Issue
Just Accepted
All Issues
Special Issues
Turner Review Series
Sample Issue
For Authors
General Information
Notice to Authors
Submit Article
Open Access
For Referees
Referee Guidelines
Review Article
Annual Referee Index
For Subscribers
Subscription Prices
Customer Service
Print Publication Dates

blue arrow e-Alerts
blank image
Subscribe to our Email Alert or RSS feeds for the latest journal papers.

red arrow Connect with us
blank image
facebook twitter youtube

red arrow PrometheusWiki
blank image
PrometheusWiki
Protocols in ecological and environmental plant physiology

 

Article << Previous     |     Next >>   Contents Vol 33(6)

Frost as a Factor Influencing the Growth and Distribution of Subalpine Eucalypts

NJ Davidson and JB Reid

Australian Journal of Botany 33(6) 657 - 667
Published: 1985

Abstract

An examination was made of the effect of natural frosts on pole stands of eucalypts growing within and surrounding a shallow depression at Snug Plains (alt. approx. 600 m) in south-eastern Tasmania. Marked differences in microclimate occurred between the slopes surrounding the depression and the base of the depression. The most severe frosts were experienced by the site at the base of the depression, and during a cold spell in June 1983 a record minimum temperature of - 22°C was recorded just above the radiating surface at this site. Pronounced vertical stratification of the air occurred (up to 9°C per m) and a difference in minimum temperature of 7.3°C was recorded over a distance of 200 m between a ridge-top site and the site at the base of the depression. Cooling rates of up to 6.5°C per h were recorded during these severe frosts.

The effect of frost in determining the distribution of six local species of Eucalyptus was examined by comparing the damage caused to mixed pole stands of five of the six species by the cold spell in June 1983. The order of frost sensitivity for fully hardened pole stands from the most resistant to the most susceptible was E. gunnii > E. coccifera > E. johnstonii > E. delegatensis > E. pulchella. The natural distribution of these species was closely related to the minimum temperature recorded at the various sites. Intense frosts during June 1983 caused marked changes in the dominance of mixed stands even though relatively few individuals were completely killed. These results suggest that rare, exceptionally severe frosts may play an important role in determining the distribution of subalpine eucalypts.



Full text doi:10.1071/BT9850657

© CSIRO 1985

blank image >
 
PDF (584 KB) $25
 Export Citation
 Print
  
  
Subscriber Login
Username:
Password:  

    
Legal & Privacy | Contact Us | Help

CSIRO

© CSIRO 1996-2014