Environmental effects on the dynamics of the shoot population of mountain birch trees.

Updated 2003-04-22

Bud dynamic in mountain birch, Betula pubescens ssp. czerepanovii, is affected by biotic and abiotic factors such as temperature, light and herbivory. Climate probably has a large impact on module life history strategies i.e. survival, sexual and vegetative reproduction. (Modules are here defined as partially autonomous, repetitive and multicellular subunits within a tree.) Trade-off between present reproduction and future growth and/or reproduction occurs if resources are limiting. There is no direct trade-off between male catkin production and axillary bud production in mountain birch since male catkins are produced at the terminal bud of long-shoot. This bud is aborted when no catkin is present. However, same resources are used for both male catkin production and axillary bud production indicating that trade-offs occur in mountain birch. In my study I have simulated herbivory in order to study what effect trade-offs have on growth of long-shoot and bud performance.

Time frame

Status
Completed
Project time span
2000 - 2002
Data collection
not specified
Data processing
not specified
Data reporting
not specified

Contact information

Contact person
Christina Borg
Address
Dep of Plant Ecology Evolutionary Biology Centre Uppsala University Villav├Ągen 14 753 24 Uppsala

Parameters and Media

Not specified

Geography

Regions studied
Abisko Scientific Research Station

Data availability

Samples/specimens archived in specimen banks?
No

Methods & Procedures

Not specified

Additional Information

Is this a bi- AND multi-lateral project (i.e. a project involving cooperation between different countries)?
No
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