Plant Phytomass Changes in a Lar ch Forest of the Lake Hövsgöl Area, Northern Mongolia

• Main Authors: Jamsran Oyumaa, Tseden Jamsran
• Format: Article
• Language: English
• Published: National University of Mongolia 2007-12-01
• Series: Mongolian Journal of Biological Sciences
• Subjects: Phytomass dynamics; air temperature; precipitation; Lake Hövsgöl
• Online Access: http://mjbs.num.edu.mn/uploads/files/MJBS%20Volume%205%20Number%201-2%20December%202007/pdf/mjbs005-01-02-07.pdf

In the present study we related the decrease of the vegetation productivity in a larch forest with an increase of the air temperature over a 20-year period (1987-2007). During the years of the study the data from nearby weather stations showed warming and drying trends in climatic conditions: a 1.6 0 C increase of mean annual temperature, increase in maximum and minimum temperature extremes, and delay of summer rains. Plant community changes include the shift in species dominance from mesophytes to xerophytes, decrease in vegetation cover and plant height, and transformation of a single July blooming peak to the more diffuse blooming season. We also showed the plant phytomass of the larch forest of the Hövsgöl region is decreasing in response to the climate changes.