BIODIVERSITAS ISSN: 1412-033X Volume 23, Number 1, January 2022 E-ISSN: 2085-4722 Pages: 244-255 DOI: 10.13057/biodiv/d230130 Comparisons of the composition of spider assemblages in three vegetation habitats in Bogor, West Java, Indonesia MAYANDA LIA 1, , AUNU RAUF 2, , DADAN HINDAYANA 2 1 Program of Entomology, Graduate School, Institut Pertanian Bogor. Jl. Meranti, IPB Dramaga Campus, Bogor 16680, West Java, Indonesia. Tel.: +62-251-8629354, Fax.: +62-251-8629352,  email: mayanda.lia.17@gmail.com 2 Department of Plant Protection, Faculty of Agriculture, Institut Pertanian Bogor. Jl. Meranti, IPB Dramaga Campus, Bogor 16680, West Java, Indonesia. Tel.: +62-251-8629354, Fax.: +62-251-8629352,  email: aunu@indo.net.id Manuscript received: 10 August 2021. Revision accepted: 24 December 2021. Abstract. Lia M, Rauf A, Hindayana D. 2021. Comparisons of the composition of spider assemblages in three vegetation habitats in Bogor, West Java, Indonesia. Biodiversitas 23: 244-255. Vegetation structures are known to influence the microclimate and consequently the invertebrate assemblages. This study, therefore, aims to compare the species composition of assemblages of ground- and foliage-dwelling spiders in three vegetation habitats: undisturbed urban forest, oil palm plantation, and cornfield, in Bogor, West Java. To ensure a thorough representation of all spider guilds, spiders were collected using pitfall traps, sweep net, and through a direct search on ground and vegetation from January to July 2016. A total of 2299 individual spiders, representing 28 families and 207 species/morphospecies were collected. The spider species richness, abundance, and diversity were higher in the forest and oil palm plantation, compared to the cornfield. Furthermore, the dominant guild in the forest habitat was orb weavers, while the oil palm and corn habitats were dominated by ground runners. The non-metric multidimensional scaling exhibited that the composition of spider assemblages varied among the three vegetation habitats, with spider assemblages in forest habitat associated with higher RH, while the corn habitat was correlated with high light intensity and air temperature. The indicator species analysis revealed that Tetragnathidae has high potential as indicators of the dense, complex vegetation structure of the forest, while Lycosidae is indicators of the more open vegetation of oil palm plantation and cornfield habitats. Keywords: Biodiversity, cornfield, forest, indicator species, oil palm, spider assemblages INTRODUCTION Among terrestrial invertebrates, spiders (order Araneae) are one of the most significant in terms of abundance, diversity, biomass, and functional roles (Foelix 2011; Mammola et al. 2017), with over 49000 species reported worldwide (World Spider Catalog 2021), and 2526 of these species are found in Indonesia (Gutierrez 2020). Spiders are very common in most habitat types and are crucially important in biodiversity conservation (Kaltsas et al. 2019; Michalko et al. 2019; Milano et al. 2021). These invertebrates are predators in most terrestrial ecosystems and serve as a significant source of food for higher trophic levels like reptiles, birds, and mammals (Nyffeler and Birkhofer 2017), hence providing vital ecosystem services to humans regarding the control of arthropod pests in the agroecosystems (Michalko et al. 2019). The silk, venom and hemolymph obtained from spiders are sources of inspiration for biological engineering (Ko and Wan 2018), pharmacology, and medicine (Riciluca et al. 2012; Pineda et al. 2018). Additionally, these invertebrates also serve as an indicator of environmental quality due to their sensitivity to environmental changes (Buchholz and Schroder 2013; Rubio 2016; Hadad and Butler 2018). Spiders have proven to be a suitable model group within a wide variety of ecological studies due to their high abundance and species diversity, ease of sampling, and distinct spatial habitat preferences (Buchholz and Schroder 2013). Numerous factors influence the species composition of spider assemblages, including variations in plant community structure, ecosystem dynamics, like disturbances, and abiotic factors, for instance, soil, ambient humidity, and temperature (Foelix 2011; Galle and Schweger 2014; Rodrigues et al. 2016). A meta-analysis by Prieto-Benitez and Mendez (2011) highlighted the negative effects of land management, particularly mechanical disturbances (ploughing, cutting, harvesting) on spider species richness, abundance, and diversity at agroecosystems due to the detrimental impacts on habitat heterogeneity or prey populations. However, these effects are less prominent in forest habitats, where the main negative effect is fragmentation. According to Rodrigues et al. (2016), understanding the composition and distribution of spider species within different habitats is the first step to increasing scientific knowledge on the dynamics of spider assemblages. However, the existing studies on the ecology of spider communities in Indonesia are very few and restricted to one vegetation habitat type (Suana et al. 2009; Koneri and Nangoy 2017; Potapov et al. 2020). Therefore, this study aims to describe and compare the richness and species composition of ground- and foliage-dwelling spiders in forest, oil palm plantation, and cornfield habitats and determine possible habitat associations of spider species and indicators species for each vegetation habitat.