Spider community responds to litter complexity: insights from a small-scale experiment in an exotic pine stand

Podgaiski, Luciana Regina; Rodrigues, Gilberto Gonçalves

doi:10.1590/1678-4766e2017007

Cited by 7 publications

(7 citation statements)

References 42 publications

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“…Nesse aspecto, o grupo Collembola é influenciado pela qualidade do substrato depositado no solo já que, participa dos processos de degradação da serapilheira, pois tem como fonte alimentar a microbiota (decompositores) e matéria orgânica do solo (Oliveira Filho et al, 2016). Já o grupo Araneae pode ser indiretamente influenciado pelo substrato orgânico e o teor de Zn +2 já que, o material orgânico tem efeito positivo sobre Collembola, grupo de organismos predados por Araneae (Podgaiski & Rodrigues, 2017). Da mesma forma existe relação de predação entre os grupos Acari e Collembola (Silva et al, 2013) e o grupo Acari é também influenciado pela matéria orgânica aportada ao solo (Almeida et al, 2017).…”

Section: /12unclassified

Fauna edáfica em sistemas de produção de banana no Sul de Santa Catarina

Casaril

Filho

Santos

et al. 2019

Agraria

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AGRONOMIA (AGRONOMY)RESUMO: A fauna do solo é sensível as modificações no ambiente e, portanto, pode ser eficiente como indicadora de qualidade em áreas de produção de banana. O objetivo do estudo foi avaliar os efeitos da produção de banana sobre a fauna edáfica em função das diferentes práticas culturais, manejos e aspectos químicos e físicos do solo. Avaliaram-se dois bananais e uma área de mata nativa, no sul de Santa Catarina em duas épocas. Para coleta de fauna utilizou-se o método de armadilhas de queda e o monólito de solo e ainda, avaliou-se a química e física do solo. Para fauna avaliou-se a abundância e riqueza de organismos amostrados, índices de diversidade de Shannon-Wiener e Pielou e procederam-se análises multivariadas. Os grupos de destaque na coleta por armadilhas de queda nos bananais foram Collembola, Formicidae e Acari e na coleta pelo monólito de solo, os grupos Oligochaeta e Diptera (larvas). Quanto aos índices de diversidade os bananais apresentam maiores índices na última coleta pelo monólito de solo. Identificou-se relação da fauna com pH, Al +3 , Fe +3 , Zn +2 , Mg +2 , macroporosidade e densidade do solo. Conclui-se que as principais práticas culturais dos bananais relacionadas com a fauna são a calagem, adubação e disposição dos restos culturais no solo.

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Section: /12unclassified

Fauna edáfica em sistemas de produção de banana no Sul de Santa Catarina

Casaril

Filho

Santos

et al. 2019

Agraria

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“…Comparable to our results, Kosulic et al (2016) found higher species numbers but lower functional diversity of spider assemblages in oak forests with an open canopy compared to oak forests with dense canopy (see also Ziesche & Roth, 2008). High habitat complexity in the ground stratum caused by the herb layer, tree stumps, branches, open soil, moss and leaf litter might provide a higher number of niches that could allow closely related species to coexist (Podgaiski & Rodrigues, 2017). Moreover, open forests are characterized by higher, small‐scale variation in soil and litter moisture (Stein & Kreft, 2015) due to the loss of mature trees.…”

Section: Discussionmentioning

confidence: 99%

A replicated study on the response of spider assemblages to regional and local processes

Müller

Brandl

Cadotte

et al. 2022

Ecological Monographs

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Understanding species richness variation among local communities is one of the central topics in ecology, but the complex interplay of regional processes, environmental filtering, and local processes hampers generalization on the importance of different processes. Here, we aim to unravel drivers of spider community assembly in temperate forests by analyzing two independent data sets covering gradients in elevation and forest succession. We test the following four hypotheses: (H1) spider assemblages within a region are limited by dispersal, (H2) local environment has a dominant influence on species composition and (H3) resources, and (H4) biotic interactions both affect species richness patterns. In a comprehensive approach, we studied species richness, abundance, taxonomic composition, and trait-phylogenetic dissimilarity of assemblages. The decrease in taxonomic similarity with increasing spatial distance was very weak, failing to support H1. Functional clustering of species in general and with canopy openness strongly supported H2. Moreover, this hypothesis was supported by a positive correlation between environmental and taxonomic similarity and by an increase in abundance with canopy openness. Resource determination of species richness (H3) could be confirmed only by the decrease of species richness with canopy cover. Finally, decreasing species richness with functional clustering indicating effects of biotic interactions (H4) could only be found in one analysis and only in one data set. In conclusion, our findings indicate that spider assemblages within a region are mainly determined by local environmental conditions, while resource availability, biotic interactions and dispersal play a minor role. Our approach shows that both the analysis of different aspects of species diversity and replication of community studies are necessary to identify the complex interplay of processes forming local assemblages.

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“…On a scale relevant for spiders, habitat structure is determined mainly by vegetation (or sometimes even by a single plant), which provides spiders with a decent level of humidity, shelter, abundance of prey, and sufficient structures for building webs [22][23]43]. Structurally more complex habitat increases the number of spiders, spider species, and species diversity [19,22,44]. Moreover, field experiments showed that individuals of spiders are larger in such habitats.…”

Section: Discussionmentioning

confidence: 99%

Impact of Habitat Complexity on Body Size of Two Spider Species, Alopecosa cuneata and A. pulverulenta (Araneae, Lycosidae), in River Valley Grasslands

Stańska¹,

Stański²,

Wielgosz³

et al. 2018

Pol. J. Environ. Stud.

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Many studies have shown that vegetation structure and habitat complexity affect taxonomic composition, functional diversity, and the number of individuals in spider assemblages. These factors also affect spider body size, but mechanisms responsible for that are still not well understood. In our research, we examined the relationship between the body size of spiders from two species -Alopecosa cuneata and A. pulverulenta -and environmental factors such as habitat type and habitat complexity. Our research was conducted in the Bug River Valley on 12 plots covering three types of habitats: mesic meadow, sandy grassland, and xerothermic grassland. Spiders were collected in 2007-08 from April to mid-November using pitfall traps. In total we measured 334 males and 168 females of Alopecosa cuneata and 315 males and 104 females of A. pulverulenta. The generalized linear mixed model revealed that individuals of Alopecosa cuneata as well as A. pulverulenta reached larger sizes in more complex vegetation, whereas the habitat type did not affect the spider body size. One of the likely mechanisms responsible for a larger body size in more complex habitats is predator pressure. Birds as the main predators of spiders, being selective in their choice of prey, may collect larger spiders with higher intensity than smaller ones. We suggest that more complex habitats with dense vegetation provide better shelter for large spiders, which allows them to avoid predators. Our results indicate that habitat complexity may be an important determinant of body size distribution in spider assemblages.

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Spider community responds to litter complexity: insights from a small-scale experiment in an exotic pine stand

Cited by 7 publications

References 42 publications

Fauna edáfica em sistemas de produção de banana no Sul de Santa Catarina

Fauna edáfica em sistemas de produção de banana no Sul de Santa Catarina

A replicated study on the response of spider assemblages to regional and local processes

Impact of Habitat Complexity on Body Size of Two Spider Species, Alopecosa cuneata and A. pulverulenta (Araneae, Lycosidae), in River Valley Grasslands

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