Termitofauna (Insecta, Isoptera) em Remanescentes de Floresta Estacional Semidecidual em São Leopoldo, Rio Grande do Sul, Brasil

Florencio, Daniela Faria; Diehl, Elena

doi:10.1590/s0085-56262006000400011

Cited by 7 publications

(5 citation statements)

References 12 publications

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“…Davies, 2002;Florencio and Diehl, 2006). Termites have been shown to modulate their foraging according to food resource availability (Araújo et al, 2011).…”

Section: Discussionmentioning

confidence: 99%

The impact of edge effect on termite community (Blattodea: Isoptera) in fragments of Brazilian Atlantic Rainforest

et al. 2016

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Habitat fragmentation is considered to be one of the biggest threats to tropical ecosystem functioning. In this region, termites perform an important ecological role as decomposers and ecosystem engineers. In the present study, we tested whether termite community is negatively affected by edge effects on three fragments of Brazilian Atlantic Rainforest. Termite abundance and vegetation structure were sampled in 10 transects (15 × 2 m), while termite richness, activity, and soil litter biomass were measured in 16 quadrants (5 × 2 m) at forest edge and interior of each fragment. Habitat structure (i.e. number of tree, diameter at breast height and soil litter biomass) did not differ between forest edge and interior of fragments. Termite richness, abundance and activity were not affected by edge effect. However, differences were observed in the β diversity between forest edge and interior as well as in the fragments sampled. The β diversity partitioning indicates that species turnover is the determinant process of termite community composition under edge effect. Our results suggest that conservation strategies should be based on the selection of several distinct sites instead of few rich sites (e.g. nesting).Keywords: β diversity, habitat fragmentation, Termitoidea, species turnover.O impacto do efeito de borda na comunidade de cupins (Blattodea: Isoptera) em fragmentos de florestas da Mata Atlântica ResumoA fragmentação do habitat é considerada uma das maiores ameaças para o funcionamento do ecossistema tropical. Nesta região, os cupins desempenham um papel ecológico importante como decompositores e engenheiros do ecossistema. No presente estudo, testamos se comunidades de cupins são negativamente afetadas pelo efeito de borda em três fragmentos de Mata Atlântica. Para isso, foram amostrados a abundância de cupins e a estrutura da vegetação em 10 transectos (15 × 2 m), enquanto a riqueza, abundância de cupins e biomassa da serrapilheira foram amostrados em 16 parcelas (5 × 2 m) na borda e no interior de cada um dos três fragmentos. A estrutura do habitat (número de árvores, diâmetro à altura do peito e biomassa da serrapilheira) não diferiu entre a borda e o interior dos fragmentos. A riqueza, abundância e atividade dos cupins também não foram afetados pelo efeito de borda. No entanto, foram observadas diferenças na diversidade β entre borda e interior dos fragmentos, bem como nos fragmentos amostrados. O particionamento da diversidade β indicou que a substituição de espécies ("turnover") é o processo determinante da composição da comunidade de cupins sob efeito de borda. Nossos resultados sugerem que as estratégias de conservação devem ser baseadas na seleção de locais distintos em vez de poucos locais (via processo de aninhamento -"nesting").Palavras-chave: diversidade β, fragmentação de habitat, Termitoidea, substituição de espécies (turnover).

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“…Davies, 2002;Florencio and Diehl, 2006). Termites have been shown to modulate their foraging according to food resource availability (Araújo et al, 2011).…”

Section: Discussionmentioning

confidence: 99%

The impact of edge effect on termite community (Blattodea: Isoptera) in fragments of Brazilian Atlantic Rainforest

et al. 2016

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“…The spatial distribution of termites mounds is related to environmental characteristics such as altitude, temperature, rainfall, local availability of food resources and nesting; as well as intraand inter-specific relationships and degree of environmental disturbance (Eggleton et al, 2002;Florencio and Diehl, 2006). Species that build epigeous mounds, such as Cornitermes cumulans, can reach high population densities, especially in open environments (Constantino, 2005), such as pastures.…”

Section: Introductionmentioning

confidence: 99%

Spatial Variability and Vitality of Epigeous Termite Mounds in Pastures of Mato Grosso Do Sul, Brazil

Lima

Ceddia

Zuchello

et al. 2015

Rev. Bras. Ciênc. Solo

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Epigeous termite mounds are frequently observed in pasture areas, but the processes regulating their population dynamics are poorly known. This study evaluated epigeous termite mounds in cultivated grasslands used as pastures, assessing their spatial distribution by means of geostatistics and evaluating their vitality. The study was conducted in the Cerrado biome in the municipality of Rio Brilhante, Mato Grosso do Sul, Brazil. In two pasture areas (Pasture 1 and Pasture 2), epigeous mounds (nests) were georeferenced and analyzed for height, circumference and vitality (inhabited or not). The area occupied by the mounds was calculated and termite specimens were collected for taxonomic identification. The spatial distribution pattern of the mounds was analyzed with geostatistical procedures. In both pasture areas, all epigeous mounds were built by the same species, Cornitermes cumulans. The mean number of mounds per hectare was 68 in Pasture 1 and 127 in Pasture 2, representing 0.4 and 1 % of the entire area, respectively. A large majority of the mounds were active (vitality), 91 % in Pasture 1 and 84 % in Pasture 2. A "pure nugget effect" was observed in the semivariograms of height and nest circumference in both pastures reflecting randomized spatial distribution and confirming that the distribution of termite mounds in pastures had a non-standard distribution.

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“…Termite species richnesses, abundances, diversity, and trophic structures, however, differ between the two kinds of ecosystems. Greater species richness (EGGLETON et al 1997, FLORENCIO & DIEHL 2006, VASCONCELLOS et al 2010 and greater density (7000 individuals/m 2 and 1100 individuals/m 2 , respectively) (BIGNELL & EGGLETON 2000, MIKLÓS 1998 have been observed in humid forests than in arid or semiarid environments. Differences related to feeding groups are also observed, with humus-consuming species being more abundant and vulnerable to environmental alterations in humid forests (EGGLETON et al 1997, 2002, VASCONCELLOS 2010.…”

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confidence: 99%

Termite assemblages (Blattodea: Isoptera) in a habitat humidity gradient in the semiarid region of northeastern Brazil

Couto¹,

Albuquerque²,

Vasconcellos³

et al. 2015

Zoologia (Curitiba)

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We compared the termite assemblages of different ecosystems in a humidity gradient. Three areas were sampled: (i) a humid montane forest; (ii) a hillside forest where shaded coffee (Coffea arabica Linnaeus, 1753) is cultivated; (iii) a seasonally dry forest (Caatinga). Active collection protocols were employed in each area during the dry and rainy seasons. The species were grouped according to their habitats and feeding habits. A total of 45 termite species belonging to 20 genera and three families were encountered. The termite fauna of the Caatinga was as rich and abundant as that of the humid forest areas, but it was distinct from it in species composition. Most termite species encountered in the montane forest were also found in the agro-ecological site, but some species were only found in the latter. The termite fauna of the Caatinga varied seasonally the most, with significantly reduced abundance during the dry period. When species richness, abundance, and species composition were considered together the climatic seasons were not found to significantly affect the termite faunas in any of the study areas. The numbers of encounters per feeding group and per habitat exploited did not differ among the different areas, or during the different seasons. Even in adjacent areas, the humidity gradient, as well as the vegetational characteristics, are reflected in differences in the termite fauna. Agro-ecological regimes can be considered viable alternatives to traditional methods of cultivation as they largely conserve the biodiversity found in non-modified environments.

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Termitofauna (Insecta, Isoptera) em Remanescentes de Floresta Estacional Semidecidual em São Leopoldo, Rio Grande do Sul, Brasil

Cited by 7 publications

References 12 publications

The impact of edge effect on termite community (Blattodea: Isoptera) in fragments of Brazilian Atlantic Rainforest

The impact of edge effect on termite community (Blattodea: Isoptera) in fragments of Brazilian Atlantic Rainforest

Spatial Variability and Vitality of Epigeous Termite Mounds in Pastures of Mato Grosso Do Sul, Brazil

Termite assemblages (Blattodea: Isoptera) in a habitat humidity gradient in the semiarid region of northeastern Brazil

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