Burning effects on detritivory and litter decay in<i>Campos</i>grasslands

Podgaiski, Luciana Regina; Goldas, Camila da Silva; Ferrando, Claire Pauline Röpke; Silveira, Fernanda Schmidt; Joner, Fernando; Overbeck, Gerhard E.; Mendonça, Milton de Souza; Pillar, Valério D.

doi:10.1111/aec.12132

Cited by 20 publications

(22 citation statements)

References 61 publications

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“…Podgaiski et al . () indeed found reduced densities of soil fauna (e.g. Collembola and Acari) 1 month after fire, and Podgaiski et al .…”

Section: Discussionmentioning

confidence: 79%

“…First, due to the huge simplification of the soil surface structure, reduced moisture and leaf litter substrates just after fire (Fidelis et al, 2012;Podgaiski et al, 2014), we expect negative fire effects on fungus-feeding thrips species richness, at least in the first month after fire, as it was previously recorded to other groups of soil fauna (Podgaiski et al, 2014).…”

Section: Introductionmentioning

confidence: 75%

“…More details on the study site and experimental design can be found in Podgaiski et al . (, ), and Ferrando et al . ().…”

Section: Methodsmentioning

confidence: 92%

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Prescribed patch burnings increase thrips species richness and body size in grassland communities

Podgaiski

Cavalleri

Ferrando

et al. 2017

Insect Conserv Diversity

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Prescribed patch burning is a well‐known tool for grassland and savanna management that has been recognised as a suitable strategy to enhance biodiversity at landscape‐level scales. Nevertheless, effective monitoring of the biota responses to fire is an essential step towards biodiversity conservation. We investigated fire effects on thrips communities (Thysanoptera) – a group of minute and diverse insect in grasslands. We performed a replicated small‐scale fire experiment in South Brazilian Campos, and tested for fire effects on total abundance, species richness of different feeding guilds (e.g. leaf, flower and fungal feeders) and thrips species body size in the short (1 month) and long‐term (1 year). We found positive fire effects on leaf herbivore richness in recently burned patches where the resprouted vegetation had enhanced nutritional quality, and also later on following the diversification of plant communities. The richness of fungivorous thrips was also benefited by resource heterogeneity in burned patches 1 year after fire. A positive fire effect on thrips community body size was also found at this time, possibly indicating that larger species had an advantage in dispersal to the spatially distributed burned patches across the unburned grassland matrix. Effects on total abundances were not detected. Our study emphasises the role of prescribed patch burnings in producing high quality resource‐rich habitat spots for Thysanoptera communities at local scales.

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“…Podgaiski et al . () indeed found reduced densities of soil fauna (e.g. Collembola and Acari) 1 month after fire, and Podgaiski et al .…”

Section: Discussionmentioning

confidence: 79%

Section: Introductionmentioning

confidence: 75%

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Prescribed patch burnings increase thrips species richness and body size in grassland communities

Podgaiski

Cavalleri

Ferrando

et al. 2017

Insect Conserv Diversity

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“…Our study of effects of a persistent global change on soil biota over a period from few to many generations of the longest living members is quite unique. Reported recovery of soil fauna communities after disturbances show various levels of resilience ranging from decades after mining activity55 or years after extended drought50, to months following burning565758 and moderate drought5960.…”

Section: Discussionmentioning

confidence: 99%

Long-term and realistic global change manipulations had low impact on diversity of soil biota in temperate heathland

Holmstrup

Damgaard

Schmidt

et al. 2017

Sci Rep

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In a dry heathland ecosystem we manipulated temperature (warming), precipitation (drought) and atmospheric concentration of CO2 in a full-factorial experiment in order to investigate changes in below-ground biodiversity as a result of future climate change. We investigated the responses in community diversity of nematodes, enchytraeids, collembolans and oribatid mites at two and eight years of manipulations. We used a structural equation modelling (SEM) approach analyzing the three manipulations, soil moisture and temperature, and seven soil biological and chemical variables. The analysis revealed a persistent and positive effect of elevated CO2 on litter C:N ratio. After two years of treatment, the fungi to bacteria ratio was increased by warming, and the diversities within oribatid mites, collembolans and nematode groups were all affected by elevated CO2 mediated through increased litter C:N ratio. After eight years of treatment, however, the CO2-increased litter C:N ratio did not influence the diversity in any of the four fauna groups. The number of significant correlations between treatments, food source quality, and soil biota diversities was reduced from six to three after two and eight years, respectively. These results suggest a remarkable resilience within the soil biota against global climate change treatments in the long term.

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“…In general it is not exactly know how the Pampa was before more than some 300 years ago, when disturbance increases dramatically after the European colonization due cattle introduction, uncontrolled fi re management, farming and silvicultural activities (Suertegaray & Silva, 2009;Rodrigues et al, 2010;Podgaiski et al, 2014;Ferrando et al, 2016). Considering theses disturbances, many components of the biota, as also the invertebrate fauna, should be directly aff ected.…”

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confidence: 99%

Short-term spider community monitoring after cattle removal in grazed grassland

Silva

Ott

2017

Iheringia, Sér. Zool.

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ABSTRACT. At the Pampa Biome, grazing, like others disturbances, aff ects fauna and fl ora, creating heterogeneity in the environment. Little is known about how the diversity and richness of arthropods change during this impact. To improve the knowledge of how spider diversity is aff ected by grazing, experiments were realized at Pampa. The hypothesis is that abundance of spider will be diff erent when comparing grazed and ungrazed areas. A paired block, with two areas of one hectare each, was established in three areas in the Environmental Protection Area of Ibirapuitã (APA Ibirapuitã), state of Rio Grande do Sul, Brazil. One of these hectares was closed with fences, excluding the catle grazing, in August of 2012. Samplings were realized in November of 2011, 2012 and 2013 using Pitfall traps fi lled with formol 4% and disposed in an "X" format in each area. For statistical analyses, T test, ANOSIM, ANOVA and Rarefaction were performed. A total of 1,315 spiders were captured, comprising 77 species or morphospecies belonging to 20 families. The family most abundant was Lycosidae followed by Hahniidae, Linyphiidae and Theridiidae. Linyphiidae was the richest family with 14 species or morphospecies identifi ed. All spiders, adults and juveniles, only adults in species and morphospecies, and most abundant species were used as models for statistics. These models revealed no signifi cant diff erence between grazed and ungrazed areas after three and 15 months of cattle exclusion.KEYWORDS. Neotropical, Pampa, diversity, Araneae.RESUMO. Monitoramento de curto prazo da comunidade de aranhas após a remoção do gado em campos pastejados. No Pampa, o pastejo, como outros distúrbios, afeta a fauna e a fl ora, proporcionando uma maior heterogeneidade no ambiente. Pouco se sabe como a diversidade e a riqueza de artrópodes muda durante este impacto. Para aprimorar o conhecimento de como a diversidade de aranhas é afetada pelo pastejo, experimentos foram realizados no Pampa. A hipótese é que a abundância de aranhas será diferente quando áreas pastejadas e sem pastejo são comparadas. Um bloco de duas parcelas, cada uma com um hectare, foi estabelecido em três fazendas na APA (Área de Proteção Ambiental) do Ibirapuitã, Rio Grande do Sul, Brasil. Um destes hectares foi fechado com cercas, excluindo o pastejo do gado, em agosto de 2012. As amostragens foram realizadas em novembro de 2011, 2012 e 2013 usando armadilhas de queda preenchidas com formol 4% e dispostas em formato de "X" em cada hectare. Foram utilizados para análise estatística Teste T, ANOSIM, ANOVA e Rarefação. Um total de 1.315 aranhas foi amostrado, compreendendo 77 espécies ou morfoespécies de 20 familias. A família mais abundante foi Lycosidae, seguida de Hahniidae, Linyphiidae e Theridiidae. Linyphiidae foi a família mais rica, com 14 espécies ou morfoespécies identifi cadas. A soma das abundâncias de aranhas jovens e adultas, a abundância de apenas aranhas adultas e a abundância total somente das espécies mais abundantes foram utilizadas como modelos estatísticos. ...

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Burning effects on detritivory and litter decay inCamposgrasslands

Cited by 20 publications

References 61 publications

Prescribed patch burnings increase thrips species richness and body size in grassland communities

Prescribed patch burnings increase thrips species richness and body size in grassland communities

Long-term and realistic global change manipulations had low impact on diversity of soil biota in temperate heathland

Short-term spider community monitoring after cattle removal in grazed grassland

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