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Araneofauna de pomares de laranja Valência nos Vales do Caí e Taquari, Rio Grande do Sul, Brasil.

Ott, Ana P.; Ott, Ricardo and Wolff, Vera R. S. (2007) Araneofauna de pomares de laranja Valência nos Vales do Caí e Taquari, Rio Grande do Sul, Brasil. [Araneofauna of Valência orange orchards at the Caí and Taquari Valleys, Rio Grande do Sul, Brazil.] Iheringia. Série Zoologia, 97 (3), pp. 321-327.

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Summary

Assembléias de aranhas da vegetação herbácea foram amostradas com rede-de-varredura em dois pomares de laranja doce(Citrus sinensis) no sul do Brasil. Cada pomar amostrado é caracterizado por receber um diferente tipo de manejo: “tradicional” ou “ecológico”. Adicionalmente, foi amostrada a assembléia de aranhas das laranjeiras do pomar com manejo “ecológico” através do uso de guarda-chuva japonês. No total foram coletadas 3.876 aranhas, 2.379 nas laranjeiras do pomar de manejo “ecológico” e 1.497 junto à
vegetação herbácea de ambos pomares; foram registradas 99 espécies de 17 famílias de aranhas; Oxyopes salticus Hentz, 1845 (Oxyopidae)foi a aranha mais abundante na vegetação herbácea e Sphecozone cristata Millidge, 1991 (Linyphiidae) a mais abundante nas laranjeiras. Aranhas errantes foram mais abundantes em ambos tipos de vegetação. A araneofauna da vegetação herbácea nos pomares com diferentes manejos não apresentou diferenças significativas na diversidade (H’= 2,13 – “ecológico”; 2,24 – “tradicional”); a diversidade foi menor nas laranjeiras (H’=1,95). Em razão de terem sido utilizados diferentes métodos de coleta nas amostragens entre os microhabitats, o índice de Jaccard (17,5%) indicou baixa similaridade entre as assembléias.

Summary translation

Assemblages of spiders of the herbaceous vegetation were sampled by sweeping method in two sweet orange orchards (Citrus sinensis) in the south of Brazil. Each sampled orchard is characterized by receiving a different handling type: “traditional” or “ecological”. In addition it was
sampled the assemblage of spiders of the orange trees of the orchard with the “ecological” handling with the beating method. A total of 3,876 spiders were collected, 2,379 in the orange trees and 1,497 in the herbaceous vegetation; 17 families and 99 species were registered; Oxyopes salticus Hentz, 1845 (Oxyopidae) was the most abundant spider in herbaceous vegetation and Sphecozone cristata Millidge,
1991 (Linyphiidae) the most abundant in the orange trees. Cursorial spiders were the most abundant guild at both herbaceous vegetation and orange trees. The araneofauna of herbaceous vegetation in the different handling orchards did not present significant differences in diversity (H’= 2.13 – “ecological”; 2.24 – “traditional”); the diversity was smaller in the orange trees (H’=1.95). Perhaps because of different sampling methods at different microhabitats, the Jaccard’s Index indicates low similarity between assemblages (17.5%).

EPrint Type:Journal paper
Keywords:Araneae, Citrus sinensis, Diversidade, Vegetação herbácea, Agroecologia, Diversity, Herbaceous vegetation, Agroecology Agrovoc code: 1647 Citrus sinensis, 92381 Agroecology, 27977 Herbaceous plants,7300 Araneae
Subjects: Crop husbandry > Production systems > Fruit and berries
Crop husbandry > Crop health, quality, protection
Research affiliation: Brazil > Other organizations
ISSN:0073-4721
DOI:http://dx.doi.org/10.1590/S0073-47212007000300017
Deposited By: Bernardo, Priscila
ID Code:20310
Deposited On:15 Oct 2012 15:14
Last Modified:15 Oct 2012 15:14
Document Language:Portuguese - Portugues
Status:Published
Refereed:Peer-reviewed and accepted

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