Ectomycorrhizae in the Arctic - implications for plant nutrition and ecosystem functioning

Updated 2003-04-24

Ectomycorrhizal (ECM) symbioses are omnipresent in the Arctic, and shifts in ECM communities may be expected in a future warmer climate. As large functional differences exist among ECM fungal genera, species and isolates, this could affect several important ecosystem processes, such as plant C fixation and allocation belowground and plant uptake of different nutrient pools. The objectives of this project are 1) to characterize responses of ECM associations of a circumpolar plant species (Betula nana L.) to manipulations of air temperature and soil nutrient availability and 2) to relate functional characteristics of ECM communities to ecosystem C and N cycling.The project consists of three elements: 1. Quantitative analyses of responses in ectomycorrhizal morphotype communities associated with B. nana to manipulations of air temperature and soil nutrient availability at two sites (Abisko, Sweden, and Toolik Lake, Alaska). Fieldwork 2002. 2. Field and growth chamber studies of functional differences among ectomycorrhizal fungi and communities from Abisko and Toolik Lake. Fieldwork 2002. 3. Along a natural gradient, relationships between ECM communities and availability and uptake of different N forms will be examined under natural conditions. Fieldwork 2003-04.

Time frame

Status
Ongoing
Project time span
2002 - 2004
Data collection
not specified
Data processing
not specified
Data reporting
not specified

Contact information

Contact person
Karina Engelbrecht Clemmensen
Address
Botanical Institute Oester Farimagsgade 2D DK-1353 Copenhagen K Denmark

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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