03747naa a2200157 a 450000100080000000500110000800800410001910000180006024500720007826000090015052030550015970000190321470000190323370000160325277303210326813148602008-09-18       2008    bl uuuu     u00u1 u    #d1 aBARROS, Y. J.  aSoil Mesofauna in an old mining area in Adrianópolis (PR), Brazil.  c2008  aThe soil degradation is a reality, and it has occurring especially as a consequence of human activity. Mining is an example, which causes a great punctual environmental impact and also adverse diffuse effects in a less visible way. There is an area in the municipal district of Adrianópolis (PR), Brazil, where mining had been practiced during almost 60 years, where several tons of scoria from lead process at open weather, under climatological conditions. A study developed by São Paulo University in this area detected lead above the standards determined by the U.S. Center for Disease Control and the Mundial Health Organization in 73 children (40,8% of the total analyzed beings), between 2 and 10 years old. As the soil is the first element to receive the pollutional amount, this work had as objective to evaluate the soil mesofauna, which operates as an environmental indicator. An incursion through the water of the antique mining factory (Plumbum S/A) was primarily done, and the determination of total (HNO3, HClO4 and HF) and exchangeable contents (BaCl2) of lead were done at several samples. Based in these results, four collections (on May, September and November of the 2007 and January 2008), done at five selected places, totalized 20 samples per place using Berleze funnels (heat extraction). The description of the selected places comes along: 1 ? clay soil, used as the reference place presenting the highest altitude, coverd by native vegetation (medium high trees and grassy); 2 ? clay soil covered by grassy (atmospheric pollution influence and high quantity of waste incorporated to the soil); 3 ? clay soil covered by medium high trees and grassy (direct influence of the chimney once used at lead process); 4 ? sandy soil covered by medium high trees, grassy and pterofits (influence of particled material from another chimney); 6 ? sandy soil covered by grassy (next to one of the piles of waste). In a general way, from all the collections, the preponderant group was Acari. Their percentage in relation to the total population of each collection was maintained around 55% at place 1 (1283,33 to 13629,13 individuals m2), 65% at place 2 (586,95 to 1731,00 individuals m2) and 80% at place 5 (437,72 to 3740,55 individuals m2), nevertheless at places 3 and 4 several variations occurred, at place 3 (676,48 to 13.987,27 individuals m2), in September and November, the percentage of Acari doubled the range of 37% in may. At place 4 (507,36 to 7500,99 individuals m2) the contents declined from approximately 72% at the three first sampling to 22,08% in January. The population of Collembola presented under 26% for all the places, being the Arthropleona the most common. However, the smaller population was found at places 2 and 5, where the Collembola do not overcome 6% of total population. Another more quantitatively expressive groups were found, especially, at place 1, which presented the higher biodiversity. In comparison of place 1 (reference), a considerable alteration of the mesofauna population was observed1 aSAUTTER, K. D.1 aMELO, V. de F.1 aBUSCHLE, B.  tIn: INTERNATIONAL COLLOQUIUM ON SOIL ZOOLOGY, 15; INTERNATIONAL COLLOQUIUM ON APTERYGOTA, 12., 2008, Curitiba. Biodiversity, conservation and sustainabele management of soil animal: abstracts. Colombo: Embrapa Florestas. Editors: George Gardner Brown; Klaus Dieter Sautter; Renato Marques; Amarildo Pasini. 1 CD-ROM.