Ground-dwelling spiders (Arachnida, Araneae) in different vegetational formations in a Neotropical floodplain

Anjos, Kellie Cristhina dos; Battirola, Leandro Dênis; Brescovit, Antônio D.; Batistella, Daniel A.; Marques, Marinêz Isaac

doi:10.4013/nbc.2017.123.02

Cited by 3 publications

(4 citation statements)

References 23 publications

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“…According to Lessard-Therrien et al (2018), the structure and ecological conditions of habitats are fundamental for determining the occurrence of spiders, since, for the most part, they are generalist predators that use a wide variety of prey, even if prey populations are small (Sunderland & Samu 2003). The dominance of hunting spiders found in this study is common in studies investigating the composition and structure of spider assemblages (Castilho et al 2005, Battirola et al 2004, Sena et al 2010, Anjos et al 2017, Yamazaki et al 2017.…”

Section: Urban Forest Fragmentsmentioning

confidence: 64%

“…The assemblage composition and the most abundant families in these fragments correspond to taxa commonly sampled in studies evaluating the ground assemblages of spiders in the state of Mato Grosso (e.g. Castilho et al 2005, Battirola et al 2010, Anjos et al 2017. Some of these families have specific behaviors or characteristics, such as the Theridiidae, key insect predators in many ecosystems, which are among the few families of spiders with a high degree of myrmecophagy (Liu et al 2016).…”

Section: Urban Forest Fragmentsmentioning

confidence: 95%

“…In our study, we used two methodologies, pitfall traps and mini-Winkler, considering that both are complementary for the ground assemblages sampling (Silva et al 2013, Carneiro et al 2016. Sampling with pitfall traps occurred over 48 hours, remaining in the field, most of the time, for several days as carried out in other studies (Battirola et al 2010, Anjos et al 2017. However, in the urban green areas from Sinop, logistical issues such as the access to the interior of the fragments prevented sampling from being conducted for a longer period of time.…”

Section: Urban Forest Fragmentsmentioning

confidence: 99%

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Ground spiders (Arachnida, Araneae) associated with urban forest fragments in southern Amazon

et al. 2020

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Forest fragments in urban areas comprise important habitats for a wide variety of species, however, conservationist policies for their maintenance and conservation are still incipient. This study examined the richness and abundance of the ground-spider assemblage in five forest fragments, with areas ranging between 18.5 and 103.98 ha, in the urban perimeter of Sinop, northern Mato Grosso State, southern Amazon region of Brazil. Sampling was carried out using the mini-Winkler extractor and pitfall traps in the dry (July) and rainy (November) seasons of 2017. All fragments were characterized in relation to the area and the Index of Biotic Integrity (IBI), to assess the effect of these variables on richness and abundance of soil spider assemblage. A total of 653 spiders were sampled, corresponding to 25 families and 52 species. Salticidae, Theridiidae, Lycosidae, Linyphiidae, Oonopidae and Symphytognathidae were the most abundant families (63.3% of the total sample). The assemblage was characterized by the dominance of hunting spiders (393 ind.; 60.2%) over web-building spiders (260 ind.; 39.8%). Greater spider abundance and richness was obtained during the rainy season (517 ind.; 79.2%; 41 spp.) as compared with the dry season (136 ind.; 20.8%; 24 spp.). Only 13 species occurred in dry and rainy season. Two species were recorded for the first time in the Amazon region, namely, Anapistula aquytabueraRheims & Brescovit, 2003 (Symphytognathidae) and Opopaea concolor (Blackwall, 1859) (Oonopidae). Species richness was not affected by IBI and area of fragment. Although the statistical model is not significant, species richness increases slightly with IBI and area of fragment. Similarly, abundance of spiders was not affected by IBI and area of fragment. Regardless of the area size, all evaluated forest fragments showed a low and regular IBI, demonstrating that these habitats have suffered with the pressures inherent from the urban perimeter, including the constant expansion of human occupation as well as misuse by the population. Nonetheless, these same fragments revealed considerable richness of species of ground spiders and can thus be categorized as important habitats for the maintenance of regional biodiversity. Therefore, action strategies must be set out to ensure their conservation.

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Section: Urban Forest Fragmentsmentioning

confidence: 64%

Section: Urban Forest Fragmentsmentioning

confidence: 95%

Section: Urban Forest Fragmentsmentioning

confidence: 99%

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Ground spiders (Arachnida, Araneae) associated with urban forest fragments in southern Amazon

et al. 2020

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“…Thus, their numbers decrease in dense forests, which is in agreement with the results observed in our study, where highest number of this family were found in more open canopy sites. The same finding was observed in areas with different vegetation in neotropical floodplains (dos Anjos et al ., ). The guild specialist was represented mainly by the myrmecophagic species Zodarion germanicum (C. L. Koch, 1837), which is strongly associated with ants.…”

Section: Discussionmentioning

confidence: 97%

The effect of canopy openness of European beech (Fagus sylvatica) forests on ground‐dwelling spider communities

Černecká

Mihál

Gajdoš

et al. 2019

Insect Conserv Diversity

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1. The composition of spider communities in forests is affected by habitat characteristics, such as canopy openness, vegetation cover or tree species diversity; therefore, we assume that the effect of canopy will differ among tree species.2. As research in European beech forests has not been conducted, we studied the effect of understory environmental characteristics associated with a gradient of overstory canopy openness in beech forest on ground-dwelling spider richness, abundance and guild composition in the Western Carpathians, Slovakia. Canopy openness, the cover of understory vegetation and litter, litter thickness and variability and soil reaction were recorded. In total, 17 332 individuals of 174 spider species were trapped during 518 days. We used Generalised Linear Models to explain the effect of environmental characteristics on the assemblages of ground-dwelling spiders; the unique and shared contributions of the predictors were calculated using variation partitioning.3. The association of canopy openness with spider species richness was hump-shaped and displayed positive linear relationship with abundance. Abundance was also affected by soil pH.4. The composition of spider communities was significantly affected by canopy openness and understory characteristics; a major part of this variation was shared between all variables. The guild composition of the assemblages interacted with canopy openness, as sheet-web weavers were dominant under the most closed canopy, that below 20% of canopy openness, while ground hunters dominated in the rest of the canopy gradient.5. The gradient of beech forest canopy openness affected spider species richness, abundance and guild composition and supported distinct assemblages.

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Minimizing the Wallacean shortfall: a small sample reveals new occurrences of ground-dwelling spiders in native Cerrado and exotic pastures in the Midwestern Brazil

Correa

Puker

Rodrigues

et al. 2020

Int J Trop Insect Sci

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Ground-dwelling spiders (Arachnida, Araneae) in different vegetational formations in a Neotropical floodplain

Cited by 3 publications

References 23 publications

Ground spiders (Arachnida, Araneae) associated with urban forest fragments in southern Amazon

Ground spiders (Arachnida, Araneae) associated with urban forest fragments in southern Amazon

The effect of canopy openness of European beech (Fagus sylvatica) forests on ground‐dwelling spider communities

Minimizing the Wallacean shortfall: a small sample reveals new occurrences of ground-dwelling spiders in native Cerrado and exotic pastures in the Midwestern Brazil

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