关键词: 空间变异性, 微生物特性, 地统计学, 污染土壤, 磷脂类脂肪酸

Abstract: Based on the second class information of forest from investigation in 1975,1988,and 2002,we studied the dynamics of landscape patterns in Zijin Mountain Amenity Forest Reserve.The results showed that in the past 30 years,the vegetation had changed significantly,and coniferous forest which was dominant in 1975 was substituted by the mixed broadleaf coniferous forest,and then transferred to deciduous broad leaf forest or mixed deciduous and evergreen broadleaf forest.In the process,the percentage of coniferous forest in the reserve area dropped from 38.9% to 9.7%,while broad leaved forest rose from 12.0% to 49.2%.Of all the landscape elements,water area and nursery had less transformation probability to other types,while non woodland transformed with a 100% probability.The most changeable patches are almost all distributed in the region with strong human activities, or with less human disturbance but better natural conditions.In the period,the landscape diversity dropped from 1.574 to 1.462,while the landscape dominance increased from 0.630 to 0.735;degree of fragmentation raised from 0.781 to 0.795;and vegetation coverage continuously grew from 51.2% in 1963 to 70.2% in 2002. The landscape shape coefficient kept steadily.But different landscape elements had different change trends.For the coniferous forest,with the average area of the patches decreasing,the fragmentation raised,while the shape coefficient declined.But for deciduous forest,the average area of the patches and shape coefficients increased and the fragmentation decreased.According to the Malkov model,the percentage of deciduous forest area will increase continuously to 55.23,and the forest coverage will grow to 74.09% in year 2016.

Key words: Spatial variation, Microbial property, Geostatistics, Contaminated soil, Phospholipid fatty acid