关键词: 亚高山森林, 箭竹, 杨树, 磷脂脂肪酸, 凋落物分解

Abstract: Understanding the distribution and spatial autocorrelation pattern of arthropods in cropped and non-cropped habitats is a basis for optimizing agricultural landscape layout and composition. In this study, arthropods were sampled from three sites with 1 km×1 km grids with a proportion of non-cropped habitats from 10% to 20% in Liaozhong County in the lower Liaohe Plain. The distribution of arthropods was analyzed and spatial autocorrelation of arthropods onregional and local scales was analyzed based on GeoDa. The results showed differences in the average number and population size of arthropods among different habitats, with the most individual number of arthropods in ditches. The individual number decreased from woodland, grassland, pond, hedge, farmland, rural road to orchard. The population size of arthropods decreased from farmland, woodland, hedge, rural road, ditch, grassland, pond to orchard. The spatial distribution of arthropods had significant spatial autocorrelation and aggregation status. There were “hot spots” with high-high aggregation of arthropods in ditch, grassland, woodland and hedge, whereas there were “cold spots” with low-low aggregation of arthropods in continuous farmland. There were no obvious high-high aggregation areas in rural road and orchard. Therefore, agricultural landscapes combined with ditches, grasslands, woodlands and hedges had positive effects on arthropods quantity.

Key words: phospholipid fatty acids, litter decomposition, subalpine forest., Populus simonii, Fargesia spathacea