Sociobiology 63(2): 735-743 (June, 2016) DOI: 10.13102/Sociobiology.V63i2.824
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Sociobiology 63(2): 735-743 (June, 2016) DOI: 10.13102/sociobiology.v63i2.824 Sociobiology An international journal on social insects RESEARCH ARTICLE - ANTS Ant community (Hymenoptera: Formicidae) associated with Callisthene fasciculata (Spr.) Mart. (Vochysiaceae) canopies in the Pantanal of Poconé, Mato Grosso, Brazil L Yamazaki1, J Dambros1, E Meurer2, VF Vindica1, JHC Delabie3, MI Marques2, LD Battirola1 1 - Universidade Federal de Mato Grosso, Sinop-MT, Brazil 2 - Universidade Federal de Mato Grosso, Cuiabá-MT, Brazil 3 - Universidade Estadual de Santa Cruz, Ilhéus-BA, Brazil Article History Abstract Ants act in different trophic levels and are important due to their abundance, Edited by distribution and diversity in a variety of habitats, exercising influence on many Kleber Del-Claro, UFU, Brazil Received 14 July 2015 different organisms and ecosystems. Thus, this study compared temporal variation Initial acceptance 01 March 2016 on the structure and composition of the ant community in canopies of Callisthene Final acceptance 09 May 2016 fasciculata (Spr.) Mart. (Vochysiaceae) during high water and dry periods, in the Publication date 15 July 2016 Pantanal of Poconé, Mato Grosso, Brazil. Ant sampling was performed on 12 specimens of C. fasciculata, in 2010 and 2011, using canopy fogging with insecticide, in Keywords Biodiversity, canopy, temporality, mono- a total of 120m² of sampled canopy. Altogether, 2,958 ants were collected. The 2,943 dominance. adults were distributed in four subfamilies, 12 genus and 26 species. Myrmicinae (18.7 ind./m2) was the most representative taxon, followed by Formicinae (3.2 Corresponding author ind./m2), Dolichoderinae (2.2 ind./m2) and Pseudomyrmecinae (0.3 ind./m2). The Lúcia Yamazaki community is made up of six trophic groups, in which omnivorous (23.5 ind./m2) Universidade Federal de Mato Grosso were the most prevalent, followed by minimum hypogeical generalists (0.5 ind./m2) Campus Universitário de Sinop 2 Sinop-MT, Brazil and arboreal generalist predators (0.3 ind./m ). Although the results showed that E-Mail: [email protected] ant community richness, associated to C. fasciculata canopies, does not represent a significant difference among the seasonal periods, there are differences as to species distribution on the host plant over the seasonal periods, indicating the influence of temporal variation, and therefore, habitat conditions on this community. Introduction Among the arthropods, Formicidae is an important component of the communities inhabiting the tree layer of The forest canopy is responsible for mechanisms that tropical forests, using same as habitat, foraging area and regulate key processes in ecosystems (Basset et al., 2002), nesting (Corrêa et al., 2006). This association also allows such as high primary productivity (Lowman & Nadkarni, plants to benefit because the ants provide materials which 1995). This productivity makes a high variety of resources are rich in nitrogen, food waste and useful metabolic waste possible, especially food, for different taxa, including arthropods to plants (Delabie et al., 2003), as well as reducing herbivory (Novotny et al., 2002a,b), which represent the most abundant activity by organisms that feed on these plants, influencing the and diverse taxon associated with tropical forest canopies in all structuring of the communities in these habitats (Hölldobler regions of the world (Stork & Grimbacher, 2006). In this way, & Wilson, 1990). tree canopies are characterized as a diverse environment and Ants are predators and herbivores which are significant of considerable importance due to nutrient cycling processes in many habitats, mainly due to their abundance, omnipresence and the ecological interactions among the species that live in and diversity (Fowler et al., 1990; Kaspari, 2003). In tropical them (Adis, 1997; Adis et al., 2010). forests, seasonality is a factor that determines the structure of Open access journal: http://periodicos.uefs.br/ojs/index.php/sociobiology ISSN: 0361-6525 736 L Yamazaki et al. – Ant community associated with Callisthene fasciculata canopies their communities (Simberloff & Dayan, 1991). The majority (1m² in diameter each), distributed according to the scope of the species appear to be opportunistic foragers, feeding on and architecture of the canopy, totaling 120m2 of sample area nectar, seeds, leaves and live or dead animals, while some (10m² per sampled tree). At the base of each collecting funnel may be specialized in their feeding habits (Kaspari, 2003). a plastic bottle collector was installed with 92% alcohol which Studies carried out in the Pantanal have demonstrated remained suspended at about 1m from the ground by means that ants are an important component of the arthropods of cords tied to surrounding trees. During the high water period communities, participating in ecological processes, developing funnels were suspended at 1.5m above the soil due to flooding different survival strategies and social behaviors in these areas of part of the forest (water depth ranging between 0.1 and 0.3m). (Adis et al., 2001; Battirola et al., 2005; Castilho et al., 2007; The fogging procedure was carried out for ten minutes Santos et al., 2008; Marques et al., 2010, 2011; Soares et al., on each tree, using the synthetic pyrethroid Lambda-Cyhalothrin 2013). Considering the importance of conserving wetlands (Icon®) at 0.5%, diluted in two liters of diesel at a concentration for the maintenance of biological diversity and the role played of 1% (20ml), associated with the synergist (DDVP) 0.1% by this taxon in food chains associated with these habitats, (2ml). The fogging used was the Swingfog SN50 model, this study evaluated the temporal variation in the structure which produces a strong jet of smoke that is directed from and composition of the ant community in the canopy of the ground to all parts of the canopy. These procedures took Callisthene fasciculata (Spr.) Mart. (Vochysiaceae), during place, always, around 6:00am when the air circulation is less periods of high water and dry season in the Pantanal of intense, allowing the insecticide cloud to rise slowly through Poconé, Mato Grosso, Brazil. the canopy and not disperse. In each sampled tree a fogging and a collection took place. The collection was carried out two Material and Methods hours after application of the insecticide, the recommended time for its action on arthropods (Adis et al., 1998), when Study area the walls of the funnels were manually shaken and washed Samples were collected in the Pantanal of Poconé, with the aid of sprayers containing alcohol at 92% so that the specifically on the Fazenda Alvorada (16°26’S and 56°24’W), material could be gathered from the existing collector bottles Porto Cercado Road, in Poconé, Mato Grosso, Brazil. The at the basis of the hoppers. local climate is characterized as Aw, according to the Köppen classification. This region has well defined seasons, with the Laboratory Procedures rainy season between October and March, and the dry season All the material coming from the samples was transported between April and September, defining its water cycle in four to the Acervo Biológico da Amazônia Meridional (ABAM) of distinct seasonal periods (high water, receding water, dry and the Universidade Federal de Mato Grosso, Sinop - MT. Here all rising water) (Heckman, 1998). the ants were quantified and identified according to Fernández The samples were obtained in a monodominant, seasonally (2003a,b) and Bolton (2003, 2014). Then the ants were flooded forest, with predominance of C. fasciculata, locally compared with the reference collection from the Laboratório de known as “carvoal”, which can reach 4 to 15m in height Ecologia e Taxonomia de Artrópodes (LETA) of the Instituto when mature and has dark, thick and rough bark (Pott & de Biociências of the Universidade Federal de Mato Grosso in Pott, 1994). The flowering period is between September and Cuiabá, MT. The determination of trophic guilds was carried October, occurring together with seed dispersal generated in out according to Rojas and Fragoso (2000), Silvestre et al. the previous year (Custódio et al., 2014). It is a tree that is (2003) and Brandão et al. (2009) and the material is deposited characterized as deciduous and with dormancy absent during in the ABAM/UFMT/Sinop Entomological Collection. the rising water season until the beginning of the dry season, partial dormancy in the dry season until the beginning of the Data Analysis rising water season, and total dormancy at the end of the dry season (Corsini & Guarim-Neto, 2000). The estimate for species richness was evaluated by Bootstrap and Jackknife 1 estimators. Richness comparison Field Procedures between periods of high water level and dry was carried out using the t test. To assess the composition of species and guilds Insecticide was applied by way of fogging on 12 C. between the periods of high water and dry indirect sorting fasciculata canopies in the high water season (tree numbers was carried out by Non-Metric Multidimensional Scaling 1-6) and in the dry season (tree numbers 7-12), in 2010 and (NMDS) using one axis for analysis. The sorting was carried 2011, respectively. In each seasonal period six individual out using quantitative data and the Bray-Curtis similarity C. fasciculata were randomly selected keeping a minimum measure. The Vegan (Oksanen et al., 2013) package was used distance of 10m between each sample according to Adis et al. for NMDS analysis and richness estimates, and all analyzes (1998) and Battirola et al. (2004). Initially, the entire diameter were performed using the R software, version 3.0.1 (R Core at the base of these trees was surrounded by nylon funnels Team, 2013). Sociobiology 63(2): 735-743 (June, 2016) 737 Results Community composition A total of 2,958 ants was collected in C. fasciculata canopies during the high water and dry periods in the Pantanal of Poconé, Mato Grosso, with a density of 24.6 ind./m2. Of these individuals, 2,943 (99.5%; 24.5 ind./m2) are adults, and only 15 (0.5%; 0.1 ind./m2) are immature (larvae).