This snag-dwelling arthropod community study was conducted for the ecological evaluation of dead woods at Korean fir stand in Mt. Woonak in Pocheon-si, Gyeonggi-do, from April 2010 to August 2011. We put a windows trap and an emergence trap on the trunk of each snag, and we selected the six snags during the study periods. We collected 3930 individuals (5 class, 21order, 52 families) but we didn’t include the number of unidentified larva. We separated those individuals into the three functional groups and we found out the proportion and number of each functional group from the total individuals: herbivores (27.6%, 1083) predators (10.9%, 430), detritivores (61.4%, 2413), etc(0.1%, 4). We found out the proportion and number of each taxon group for herbivores, Armadillidae (0.15%, 6), Acarina (2.57%, 101), Psocoptera (0.25%, 10), Hemiptera (0.46%, 18), Mecoptera (0.05%, 2), Hymenoptera (not ant) (5.14%, 202), Aphididae (3.82%, 150), Cicadellidae (0.4%, 16), Curculionidae (3.61%, 142), Chrysomelidae (0.23%, 9), Elateridae (3.36%, 132), Erotylidae (3.16%, 124), Nitidulidae (2.6%, 102), Pyrochoroidae (0.08%, 3), Scarabaeidae (0.31%, 12), and Cetoniidae (0.13%, 5). Predators were consisted of the following taxa groups: Araneae (2.9%,114), Chilopoda (0.31%, 12), Formicidae (4.25%, 167), Carabidae (0.08%, 3), Staphylinidae (1.09%, 43), Cleridae (0.05%, 2), Pselaphidae (0.1%, 4), Colydiidae (0.38%, 15), Harpalidae (0.1%, 4), Histeridae (0.36%, 14), and Dermestidae (0.8%, 31). Detritivores were consisted of the following taxa groups: Millipedes (0.92%, 36), Archaeognatha(1.6%, 63), Diptera (7.81%, 307), Collembola (35.47%, 1394), Protura (0.03%, 1), Dermaptera (0.1%, 4), Tettigoniidae (0.08%, 4), Raphiidophoridae (0.03%, 1), Ipidae (14.12%, 555), Silphidae (0.15%, 6), Cuculidae (0.15%, 6), Cerambycidae (0.38%, 15), Oedeeridae (0.03%, 1), Lucamnidae (0.03%, 1), Stenotrachelidae (0.05%, 2), Buprestidae (0.13%, 5), Tenebrionidae (0.23%, 9), and Mordellidae (0.1%, 4), etc. Conclusively, the snag plays an important roll as the diverse arthropods’ habitats in the Korean fir forest ecosystem.

We've collected litter-dwelling predatory arthropods (spiders and carabid beetles) by using pitfall traps at four different fire intensity treatment areas (control, ground fire, canopy fire, and canopy fire with plantation) at four different regional areas in 2005. We analyzed the arthropod community structures with PC-Ord for the difference of arthropod community among the various fire intensity treatments and control. Our objective was to verify if there was any difference between fired areas and non fired area (control) and between canopy fire with plantation and canopy fire without plantation. From our arthropod community structures, we found there was distinct community composition difference between fired areas and non-fired area as well as between control and canopy fire treatment with plantation or non-plantation. However, we are not sure yet that there was any distinct difference between control and ground fire treatments. Our results from the multivariate analysis, Non-parametric Multidimensional Scaling ordination, could be relatively conclude that the main difference of arthropod community between fired areas and non-fired areal and canopy fire with plantation or non-plantation was caused from the difference of arthropod habitat pattern such as litter depth, litter volumem, CWD cover or volume, and et. al. When we compared to control and other treatments, we could also conclude that the canopy fire treatment with non-plantation was relatively closed to control than the canopy fire treatment with plantation.