Resposta da comunidade de formigas aos atributos dos fragmentos e da vegetação em uma paisagem da Floresta Atlântica nordestina

Gomes, Juliana Pessoa; Iannuzzi, Luciana; Leal, Inara R.

doi:10.1590/s1519-566x2010000600008

Cited by 30 publications

(27 citation statements)

References 18 publications

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“…The number of ant species in the present study was smaller than in other Atlantic Forest areas in Brazil (61 species in Leal et al, 1993; 146 species in Gomes et al, 2010), but the most representative families were the same. The small number of species in cloud forests may be explained by long-term isolation, which makes it more difficult for ants to colonize this environment and thus reduces its species richness.…”

Section: Ant Faunacontrasting

confidence: 72%

Microhabitat Characteristics That Regulate Ant Richness Patterns: The Importance of Leaf Litter for Epigaeic Ants

Queiroz¹,

Ribas²,

França³

2013

Sociobiology

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We assessed the effect of conditions and resources on the species richness of epigaeic ants in a cloud forest of the Ibitipoca State Park, Brazil. We hypothesized that the characteristics that are best related with the epigaeic microhabitat affects ant richness more closely than other characteristics. At each sampling site (36 in total) we set up an epigaeic pitfall to capture ants and measured the following environmental variables (conditions and resources): tree density, tree height, circumference at breast height, density of the herbaceous and shrubby vegetation, weight and heterogeneity of the leaf litter, and canopy cover. We built general linear models and used a function that classifies alternative models according to the second-order Akaike information criterion (AICc), in order to assess which environmental variables affect ant species richness. We collected 37 ant species and the models that better explained the variations in ant richness were: (1) null model; (2) heterogeneity of the leaf litter; and (3) weight of the leaf litter. These two environmental variables are positively related to ant richness. It is possible that epigaeic ants are influenced by the high quantity and quality of food and nesting sites provided by a heterogeneous and abundant leaf litter. Relationships between species richness and environmental characteristics should consider different predictor variables related to the microhabitat, since each microhabitat may have a specific pattern and predictor variable. Thus, the understanding of the effects of the microhabitat variables on species richness could help predicting the consequences of anthropogenic impacts

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Section: Ant Faunacontrasting

confidence: 72%

Microhabitat Characteristics That Regulate Ant Richness Patterns: The Importance of Leaf Litter for Epigaeic Ants

Queiroz¹,

Ribas²,

França³

2013

Sociobiology

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“…As usual (Santos et al 2006;Gomes et al 2010), Myrmicinae stands out among the other subfamilies for its richness in number of species. Taxa of this subfamily present a variety of behavioral, morphological and ecological adaptations that enable their representatives to explore more efficiently any kind of resources (Hölldobler & Wilson 1990;Fowler et al 1991;Ward 2010).…”

Section: Discussionmentioning

confidence: 79%

An assessment of leaf-litter and epigaeic ants (Hymenoptera: Formicidae) living in different landscapes of the Atlantic Forest Biome in the State of Bahia, Brazil

Santos

Koch

Pinto-Leite

et al. 2017

J. Insect Biodiversity

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Abstract:The Brazilian Atlantic Forest has a rich biodiversity increasingly threatened by human activities. Since the colonial period, the coast of the state of Bahia is among the most affected regions of Brazil by anthropic pressure. Bahia encloses Atlantic Forest remnants distributed in an area reaching 100-200 km along the east-west axis, by 1,000 km along the north-south axis, parallel to the coast of the Atlantic Ocean. We report hereafter the results of an intensive field survey of leaf litter and epigaeic ants realized in forest remnants of the Atlantic Forest landscapes within the original extension of the biome in 11 localities distributed along four degrees of latitude in the state of Bahia. In each site, 16 plots were collected using pitfall and eight using Winkler traps. We identified 391 ant species belonging to 71 genera and nine subfamilies. Among all species recorded, 21 were common to the whole 11 localities, while 98 species were recorded in a single locality. This study highlights the richness and diversity of epigaeic and leaf-litter ants living in the northern part of the Brazilian Atlantic Forest, and is one of the most representative soil ants' inventories ever done in this biome for a single state of Brazil.

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“…Lassau and Hochuli, 2004), most studies point to positive relationships between species richness and environmental heterogeneity (Tews et al, 2004;Cramer and Willig, 2005;Basset et al, 2012;Stein et al, 2014). For ants, a higher tree density and richness may lead to higher abundance and diversity of resources and, ultimately, result in higher species richness (Ribas et al, 2003;Ribas and Schoereder, 2007;Dejean et al, 2008;Gomes et al, 2010). However, the strength of the relationships between vegetation variables and species richness may change according to the landscape (Powell et al, 2011).…”

Section: Discussionmentioning

confidence: 99%

Canopy cover negatively affects arboreal ant species richness in a tropical open habitat

Queiroz

Ribas

2016

Braz. J. Biol.

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We tested the hypothesis of a negative relationship between vegetation characteristics and ant species richness in a Brazilian open vegetation habitat, called candeial. We set up arboreal pitfalls to sample arboreal ants and measured the following environmental variables, which were used as surrogate of environmental heterogeneity: tree richness, tree density, tree height, circumference at the base of the plants, and canopy cover. Only canopy cover had a negative effect on the arboreal ant species richness. Vegetation characteristics and plant species composition are probably homogeneous in candeial, which explains the lack of relationship between other environmental variables and ant richness. Open vegetation habitats harbor a large number of opportunistic and generalist species, besides specialist ants from habitats with high temperatures. An increase in canopy cover decreases sunlight incidence and may cause local microclimatic differences, which negatively affect the species richness of specialist ants from open areas. Canopy cover regulates the richness of arboreal ants in open areas, since only few ant species are able to colonize sites with dense vegetation; most species are present in sites with high temperature and luminosity. Within open vegetation habitats the relationship between vegetation characteristics and species richness seems to be the opposite from closed vegetation areas, like forests.Keywords: environmental heterogeneity, microclimate, vegetation characteristics, hierarchical partitioning, candeia.A cobertura de dossel afeta negativamente a riqueza de formigas arborícolas em um hábitat tropical aberto ResumoNós testamos a hipótese de que há uma relação negativa entre as características da vegetação e a riqueza de espécies de formigas em habitats abertos como o candeial. Para isto, nós instalamos pitfalls arborícolas para a captura de formigas e mensuramos as seguintes variáveis ambientais: riqueza de árvores, densidade de árvores, altura de árvores, circunferência basal das plantas e cobertura de dossel. Somente a cobertura de dossel apresentou efeito negativo na riqueza de formigas arborícolas. Provavelmente, as características da vegetação e a composição de espécies de plantas são mais homogêneas no candeial, o que explica a ausência de relação entre a riqueza de formigas e as outras variáveis ambientais. Formações abertas abrigam um grande número de espécies oportunistas e generalistas, além de formigas especialistas de climas quentes. O aumento na cobertura de dossel diminui a incidência solar o que pode causar diferenças microclimáticas que afetam negativamente as espécies de formigas especialistas de hábitats abertos. A cobertura de dossel regula a riqueza de espécies de formigas arborícolas em áreas abertas e poucas espécies nestes locais estão aptas a colonizar locais com a vegetação densa. Assim, a maioria das espécies estão presentes em locais com alta temperatura e luminosidade. Em outras palavras, em hábitats de vegetação aberta a relação entre características da vegetaç...

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Resposta da comunidade de formigas aos atributos dos fragmentos e da vegetação em uma paisagem da Floresta Atlântica nordestina

Cited by 30 publications

References 18 publications

Microhabitat Characteristics That Regulate Ant Richness Patterns: The Importance of Leaf Litter for Epigaeic Ants

Microhabitat Characteristics That Regulate Ant Richness Patterns: The Importance of Leaf Litter for Epigaeic Ants

An assessment of leaf-litter and epigaeic ants (Hymenoptera: Formicidae) living in different landscapes of the Atlantic Forest Biome in the State of Bahia, Brazil

Canopy cover negatively affects arboreal ant species richness in a tropical open habitat

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