Avalos Gilberto, Rubio Gonzalo D, Bar Maria E, González Alda
Cáitedra de Artrópodos, Facultad de Ciencias Exactas y Naturales, Universidad Nacional del Nordeste, Avda. Libertad 5470 (3400) Corrientes, Argentina.
Rev Biol Trop. 2007 Sep-Dec;55(3-4):899-909.
The advancing degradation of the forest in the biogeographic Chaco province (Argentina) produces an important loss of its little known biodiversity. We studied the spider biodiversity in two forests of Corrientes, Argentina's "Distrito Oriental Húmedo del Chaco": Laguna Brava and El Perich6n. Seasonal samplings of foliage and fallen leaves between 2001 and 2002 produced 2067 individuals from 33 families and 226 species/morphospecies). The families Araneidae, Anyphaenidae, Salticidae and Theridiidae were the most abundant in both forests. The "orb weavers" guild had the highest number of specimens (n=382) and "stalkers" the highest richness (S=56). In Brava, highest abundance was in the summer (n=287) and spring (n=273), in Perichón, it was in winter (n=315). The specific richness and the diversity indexes were higher in Brava (S=134, H'=4.23, E=0.86, D=0.023) than in Perichón (S=127, H'=4.08, E=0.84, D=0.029). The similarity value between both forests was MH=0.611.
在生物地理查科省（阿根廷），森林的持续退化导致其鲜为人知的生物多样性大量丧失。我们研究了阿根廷“查科东部湿润地区”科连特斯省的两片森林——拉古纳布拉瓦和埃尔佩里琼的蜘蛛生物多样性。2001年至2002年期间对树叶和落叶进行的季节性采样共采集到2067只个体，分属于33个科和226个物种/形态种。园蛛科、暗蛛科、跳蛛科和球蛛科在两片森林中最为常见。“圆网蛛”类群的标本数量最多（n = 382），“ stalkers”类群的丰富度最高（S = 56）。在布拉瓦，夏季（n = 287）和春季（n = 273）的丰度最高，在佩里琼，冬季（n = 315）的丰度最高。布拉瓦的物种丰富度和多样性指数（S = 134，H' = 4.23，E = 0.86，D = 0.023）高于佩里琼（S = 127，H' = 4.08，E = 0.84，D = 0.029）。两片森林之间的相似性值为MH = 0.611。
