要旨
One tree each of Calophyllum brasiliense CAMBESS. (Guttiferae) was surveyed during low water (October 2000) and high water (February 2001) to analyze the seasonal variation in composition and structure of the associated arthropod communities. The study was performed at Pirizal, municipality Nossa Senhora do Livramento, Fazenda Retiro Novo, Pantanal of Poconé - Mato Grosso, using canopy fogging. Fogging took place at 6 a.m., the arthropods being collected in nylon funnels of 1 m in diameter, placed under the canopy and containing plastic jars filled with 92 % alcohol. The collecting procedure was divided into two steps: two hours after canopy fogging and thereafter, by thoroughly shaking the arthropods off the foliage where they might have remained. Altogether, 11,307 arthropods from 32 m² (353.3 ind./m²) were obtained, of which 10,852 ind. (95.9 %; 339.1 ind./m²) belonged to Insecta and 455 ind. (4.1 %; 14.2 ind./m²) to Arachnida, representing 17 orders. Of this total, 9,213 ind. (81.5 %; 575.8 ind./m²) were obtained during low water and 2,094 (18.5 %; 130.8 ind./m²) during high water . Thysanoptera (5,406 ind.; 58.7 %; 337.8 ind./m²), Hymenoptera (2,429 ind.; 26.4 %; 151,8 ind./m²), Collembola (447 ind.; 4.8 %; 27.9 ind./m²) and Coleoptera (250 ind.; 2.7 %; 15.6 ind./m²) dominated during low water. Hymenoptera (757 ind.; 36.3 %; 47.3 ind./m²), Diptera (348 ind.; 16.7 %; 21.8 ind./m²), Collembola (289 ind.; 13.8 %; 18 ind./m²) and Coleoptera (247 ind.; 12.2 %; 15.9 ind./m²) dominated during high water. In beetles (Coleoptera), the families Nitidulidae, Curculionidae, Staphylinidae and Corylophidae dominated, and the trophic guild of herbivores was most abundant. In the spider community, Salticidae, Anyphaenidae, Araneidae, Corinnidae and Pisauridae represented the most abundant families, and the guild of hunters prevailed over web-builders.
