Comparative estimation of leaf and chlorophyllous index for the purpose of determination of annual production of organic matter in communities of Khibiny mountain tundra.

摘要

The leaf area surface index (LAI) and chlorophyll index (ChI) for 4 plant communities different in species composition of Khibiny mountain tundra in Russia were determined. The parameters for different microgroups vary from 0.99 to 4.41 m2/m2 and from 0.33 to 0.97 g/m2 respectively. For plant communities the ranges of the indexes are less: 1.31-2.30 m2/m2 for LAI, and 0.41-0.66 g/m2 for ChI. LAI and ChI depend on the plant cover structure and species composition of a community. The direct linear relationship between the annual production of organic matter and LAI and ChI was distinguished. The correlation coefficients have values 0.83 and 0.88 respectively. The possibility of using the LAI and ChI as parameters for the indirect method of evaluation of the annual production in Khibiny mountain tundra communities is discussed.