Bioturbação e distribuição de fitólitos em Latossolos da Depressão Periférica Paulista

Rodrigues, Beatriz Motta

doi:10.11606/d.11.2019.tde-20032019-123426

Cited by 3 publications

(18 citation statements)

References 35 publications

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“…Generally, the highest level of bioturbation (%) was observed in the uppermost two meters decreasing non-linearly with depth in the studied profiles, corroborating with the studies of Humphreys andField (1998), andWilkinson et al (2009). On the other hand, Rodrigues (2019), showed a linear decrease of bioturbation (%) with depth, which was not observed in our studied profiles.…”

Section: Soil Fauna Groupssupporting

confidence: 90%

“…The BFs were described and photographed according to these quadrants. The area of biofeatures was calculated using ImageJ software, and bioturbation (%) according to equation 5 (adapted from Rodrigues, 2019).…”

Section: Biofeatures On the Macroscalementioning

confidence: 99%

“…The area of biofeatures was delineated on the UV-images using ImageJ software (Humphreys, 1993) (Figure 4). The area of biofeatures and bioturbation (%) on a microscale were calculated relative to each polished block according to equation 6 (Rodrigues, 2019).…”

Section: Biofeatures On the Microscalementioning

confidence: 99%

“…The four periods observed in the three profiles from Palotina are described below and are shown in Figure 22 and Table 18: 2019) and paleoenvironmental reconstruction researches carried out in southeast region (Pessenda et al, 1996;Rodrigues;Souza, 2019) indicate the presence of a vegetation adapted to a warm and dry climate during the Late Pleistocene until Mid-Holocene. According to the studies cited above, the start of the Early-Holocene (~11,492 cal yrs BP; Table 16) and in the Mid-Holocene (~5515 cal yrs BP; Table 16) the the occurrence of Araucaria forest (Bertoldo et al, 2014;Pinaya et al, 2019;Pagotto et al, 2020;Wilson et al, 2021).…”

Section: Palotinamentioning

confidence: 99%

“…The high presence of roots and the availability of plant material, as well as, high rates of oxygenation and water content favour the concentration of the bioturbation process at up two meters depth. The action of the roots create pores and preferential paths for the occupation and later homogenization of the fauna (Bachelier, 1978;Humphreys, 1995;Rodrigues, 2019). However, below 200 cm of deep, fauna and root activity (current and past) is still very expressive and intense, mainly in the Cascavel and Palotina soils, even with the reduced presence of roots and total C content.…”

Section: Biomantlementioning

confidence: 99%

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Long and short-term pedogenetic processes in ferralsols from magmatic province of Paraná, Brazil

Chiapini¹

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Section: Soil Fauna Groupssupporting

confidence: 90%

Section: Biofeatures On the Macroscalementioning

confidence: 99%

Section: Biofeatures On the Microscalementioning

confidence: 99%

Section: Palotinamentioning

confidence: 99%

Section: Biomantlementioning

confidence: 99%

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Long and short-term pedogenetic processes in ferralsols from magmatic province of Paraná, Brazil

Chiapini¹

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Carbon stocks in umbric ferralsols driven by plant productivity and geomorphic processes, not by mineral protection

Martinez

Silva

Calegari

et al. 2021

Earth Surf Processes Landf

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Umbric ferralsols (UF) have organic carbon stocks within the first 1 m of soil profile depth that are nearly double the size (~19 kg C m−2) compared to the average carbon stocks of all other ferralsols (~10 kg C m−2). Here, we investigate processes that allow UF to gain and maintain such extraordinary carbon stocks. Using the International Soil Research and Information Center database, complemented with recently published datasets, we show that the carbon saturation capacity of the clay + silt fractions in UF (22.8 ± 5.7 g C kg−1 soil, n = 59) does not exceed the carbon saturation capacity in other ferralsols (23.3 ± 6.2 g C kg−1 soil, n = 165), thus eliminating a particularly retentive mineral matrix as a possible explanation. Rather, carbon stocks were correlated with the thickness of A horizons (106 ± 49 cm, n = 59 in umbric versus 35 ± 22 cm, n = 165 in non‐umbric ferralsols). We subsequently hypothesized that differences in A‐horizon thickness arose from two pedogenic scenarios: (i) superior carbon accrual resulting from a unique vegetation cover capable of allocating large quantities of carbon to belowground plant organs; and (ii) geomorphic processes that led to carbon burial. We evaluated the plausibility of these scenarios considering landscape history and associated carbon flux rates, hillslope position, as well as δ13C values and Ti/Zr ratios for subsets of ferralsol profiles studied by us in a region that encompasses latitudes from 26 to 7°S in eastern Brazil. We found that exceptional carbon stocks were most prevalent in the gradual transition zone (ecotone) between savanna and rainforest, likely resulting from erosion–deposition processes, historic changes of vegetation cover composed of grasses and arboreal elements, and active bioturbation. We suggest that attempts to sequester carbon in non‐umbric ferralsols will be most successful if they emulate or promote the biotic and abiotic processes prevalent in the savanna/rainforest ecotone.

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Efeito da bioturbação na assembleia de fitólitos em Latossolos da Província Basáltica do Paraná

Santos

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Efeito da bioturbação na assembleia de fitólitos em Latossolos da Província Basáltica do Paraná / Thairis Gomes dos Santos. --versão revisada de acordo com a Resolução CoPGr 6018 de 2011. --Piracicaba, 2023. p.Dissertação (Mestrado) --USP / Escola Superior de Agricultura "Luiz de Queiroz".1. Opala vegetal 2. Marcador ambiental 3. Fauna do solo 4. Latossolos I Título AGRADECIMENTOSAgradeço primeiramente a uma força maior que denomino Deus, que sempre me proporcionou o melhor.À minha família, em especial as minhas tias Edite, Regina e Margarida que estão continuamente me apoiando e incentivando a seguir em frente, ao meu pai Cloves, meus irmãos, primos, tios e aos meus pets por todo amor e carinho.À minha tia Maria, minha prima Hannah e seu esposo Vinicius por me apoiarem, acolherem, incentivarem e por ter tido a oportunidade de aprender e crescer muito nos momentos que estivemos juntos, se hoje escrevo esse agradecimento devo isso em parte a vocês.Ao meu orientador Prof. Dr. Pablo Vidal-Torrado pelos ensinamentos, orientação, apoio, compreensão, enorme paciência durante esses dois anos e pela oportunidade dada de conhecer um pouco sobre o mundo dos fitólitos. À Prof. Dra Marcia Regina Calegari por me acolher, pelo apoio, pela orientação, por todo conhecimento transmitido, pela paciência e por fazer além do papel de orientadora. Ao querido Prof. Dr. Antônio Carlos de Azevedo por me abrir as portas num momento tão delicado da minha vida, sendo compreensivo e me dando a oportunidade de me aproximar mais sobre os conhecimentos de solos, por acreditar em mim e me incentivar, mesmo que indiretamente, a ser sempre uma pessoa melhor, ao seu grupo GPEMSO e todos os integrantes, pelos ensinamentos e apoio.À minha amiga Jacqueline e meu amigo Geraldo, vocês foram essenciais em toda essa jornada.Aos amigos que construí durante o mestrado, Aline, Tamires, Veronica, Maria Eduarda, André, Thais, Julio, Igor, Raphael, Angela, Altair, Rosi por dividir momentos incríveis e suavizar os momentos de tensão que passamos durante a pós-graduação.Às minhas amigas de laboratório, Bruna, Christianne e Carol pelas trocas, apoio, incentivo e todo carinho. Vocês são incríveis.Ao meu amigo Altair por me axuliar na confecção das figuras dos mapas de localização da area.Aos colegas da salinha, Mariane, Daniela, André, Raphael, Daniel e Matheus Coletti, pela convivência, troca de conhecimento e pelos auxílios.

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Bioturbação e distribuição de fitólitos em Latossolos da Depressão Periférica Paulista

Cited by 3 publications

References 35 publications

Long and short-term pedogenetic processes in ferralsols from magmatic province of Paraná, Brazil

Long and short-term pedogenetic processes in ferralsols from magmatic province of Paraná, Brazil

Carbon stocks in umbric ferralsols driven by plant productivity and geomorphic processes, not by mineral protection

Efeito da bioturbação na assembleia de fitólitos em Latossolos da Província Basáltica do Paraná

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