783 783 Environment and Ecology 38 (4) : 783—791, October—December 2020 ISSN 0970-0420 Diversity Pattern of Spiders (Araneae) from Two Selected Sites of Mango Orchard, Amreli District, Gujarat, India Parin Dal*, Varsha Trivedi Received 28 June 2020 Accepted 26 July 2020 Published on 11 March 2021 ABSTRACT Proposed work was conducted from June to November 2019 (06 months) with concerning taxonomy, species composition, feeding guild structure and diversity indices of vegetative crop stage of spiders in Mango orchards at two villages namely Morjar and Dudhala, Amreli district, Gujarat. Overall 166 individuals spiders represent 47 morphospecies of Araneomorph group belonging to 30 genera and 15 families; dominated by family Araneidae (74 individuals, 20 species) followed by Salticidae (39 individuals, 13 species) and Oxyopidae (22 individuals, 5 species). Guild structure analysis revealed seven feeding guilds, namely stalkers, orb-web builders, space-web builders, ambushers, foliage hunters, ground runners and sheet-web builders. Orb-web builders and stalkers were the most dominant feeding guilds representing 51.20% and 36.75% respectively. According to the Sorensen similarity index, the result at the level of species were 64% similar in both study sites during the study period. Ecological Parin Dal*, Varsha Trivedi Animal Ecology and Conservation Biology Research Laboratory, Department of Biosciences, UGC-Center of Advance Studies, Saurashtra University, Rajkot 360005, Gujarat, India Email:1*dalparin@gmail.com, 2 vtrivedi_2@rediffmail.com *Corresponding author indices like Simpson diversity (1-D and 1/D); Shannon diversity (H), and sheet-web builders. Orb- web builders and stalkers were the most dominant feeding guilds representing 51.20% and 36.75% respectively. According to the Sorensen similarity index, the result at the level of species were 64% similar in both study sites during the study period. Ecological indices like Simpson diversity (1-D and 1/D); Shannon diversity (H), Evenness index (e), Dominance (D) and Margalef richness index (d) were calculated. Diversity indices shown significant in Morjar site as compared to Dudhala site. It concluded that high diversity and species richness in Morjar site due to enough availability of food sources, good habitat structure, climatic factors and shelter to sustain. Evenness index (e), Dominance (D) and Margalef richness index (d) were calculated. Diversity indices shown significant in Morjar site as compared to Dudhala site. It concluded that high diversity and species richness in Morjar site due to enough availability of food sources, good habitat structure, climatic factors and shelter to sustain. Keywords: Spider, Diversity, Guild, Ecological indices, Mango orchard. INTRODUCTION Spiders are amongst the most omnipresent and