Guano-derived δ13C-based paleo-hydroclimate record from Gaura cu Musca Cave, SW Romania

Onac, Bogdan P.; Forray, Ferenc L.; Wynn, Jonathan G.; Giurgiu, Alexandra

doi:10.1007/s12665-013-2789-x

Cited by 37 publications

(38 citation statements)

References 39 publications

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“…Geochemical studies of cave guano, including studies using stable isotopes in particular, can provide paleoecological (relative abundance of C 3 -, C 4 -or CAM-type plants, vegetation changes, feeding behaviour of bats) and paleoclimate (precipitation) records (Des Marais et al, 1980;Mizutani et al, 1992a;McFarlane et al, 2002;Bird et al, 2007;Wurster et al, 2007;Onac et al, 2014Onac et al, , 2015. This work on cave paleoclimatic studies, builds on previous paleoenvironmental and paleoclimatic reconstructions using carbon isotopic composition of insect chitin in non-cave settings Miller, 1991;Gr€ ocke et al, 2006).…”

Section: Introductionmentioning

confidence: 95%

“…Cave deposits in particular are of special interest because caves provide somewhat isolated environments that are physically and chemically more stable on short time scales (less than 1 Ma) than at Earth's surface (Lauritzen, 1993), allowing for a better preservation of deposits that archive environmental conditions (speleothems, guano, sediments, etc.). This feature makes caves important in areas where other paleoclimatic data are lacking (Onac et al, 2014). Key aspects of climate variability have been most extensively and successfully reconstructed from a range of speleothem proxy parameters (e.g., d 18 O, d 13 C, trace elements, growth rate, 87 Sr/ 86 Sr, d 34 S, biomarkers, etc.…”

Section: Introductionmentioning

confidence: 99%

“…Similarly to peat and lake sediments, the organic (guano) and inorganic (clay) cave sediments may contain charred particles (Onac et al, 2014). Charcoal is carried in caves by water, wind or bats.…”

Section: Introductionmentioning

confidence: 99%

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A Late Holocene environmental history of a bat guano deposit from Romania: an isotopic, pollen and microcharcoal study

Forray

Onac

Tanţău

et al. 2015

Quaternary Science Reviews

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Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

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A Late Holocene environmental history of a bat guano deposit from Romania: an isotopic, pollen and microcharcoal study

Forray

Onac

Tanţău

et al. 2015

Quaternary Science Reviews

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“…Under favourable conditions, guano can accumulate in deposits many meters thick. These deposits have been used to examine palaeoenvironments through stable isotope analyses (Wurster et al 2008;Onac et al 2014) and palynology (Batina and Reese 2011). Southeast Asia is rich in karst terranes that house large populations of insectivorous bats and Aerodramus spp.…”

Section: Introductionmentioning

confidence: 99%

The biogeochemistry of insectivorous cave guano: a case study from insular Southeast Asia

et al. 2015

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Cave guano derived from insectivorous bats and birds contain unique geochemical and mineralogical signatures. We investigated the mineralogy, pH, C, N and metal abundance patterns of cave guano spatially and temporally (with depth) along a W-E transect in Malaysia and Palawan from five remote cave sites, each housing large populations of bats and Aerodramus spp.(cave swiftlets). Guano deposits were rich in phosphate and/or sulphate minerals (e.g., gypsum, bassanite) with leucophosphite, spheniscidite, and variscite present in most profiles. Metal abundances measured from modern and ancient bat guano revealed high concentrations of transition metals relative to the local environment. Highly enriched metals, however, were associated with phosphate rather than sulphate minerals. Copper and Zn were enriched in all profiles, whereas other metals were associated with specific caves consistent with known local mineral resources. For example, Sn, Pb, and Rb were particularly enriched in Batu Cave, located in the Peninsular Malaysian granitic tin belt, whereas Ni and Cr were high in regions associated with ultramafic ophiolites and Ni-laterites found on Palawan.

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“…Besides speleothems and sediments preserved in caves, diverse organic accumulations are preserved, as guano produced by birds or bats, fecal pellets of mammals, packrat middens, and others, and they seems to be good elements to provide information from past environment and regional climate (Plummer et al, 1997;Johnston et al, 2010;Onac et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Variações paleoambientais e paleoclimáticas durante o holoceno no Rio Grande do Norte a partir do estudo de registros geoquímicos de sedimentos de lagos e cavernas

Utida¹

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Geociências da Universidade de São Paulo e a CAPES pelas bolsas de doutorado no país e de doutorado sanduíche.Aos meus pais, pelo amor, incentivo е apoio incondicional.A toda minha família pelo apoio, carinho e compreensão da minha ausência.Ao Cristiano Roberto B. da Silva pelo apoio, carinho, companhia e incentivo. Figura 10 -Distribuição média recente das chuvas no Brasil durante os meses de dezembro, janeiro e fevereiro (DJF), março, abril e maio (MAM), junho, julho e agosto (JJA), e setembro, outubro e novembro (SON Figura 23 -Cromatograma obtido em GCMS com (A) identificação dos hopanos e moléculas da fração ácidos n-alcanos e (B) identificação das moléculas de ácidos n-alcanóicos, ambos do ABSTRACT Paleoenvironmental and paleoclimatic variations during the Holocene at Rio Grande doNorte inferred from studies about sediment geochemistry of lakes and cavesThe northern sector of Nordeste of Brazil (NEB) is one of the most interesting regions to study mechanisms and processes related to fluctuations tropical rainfall, as the majority of annual precipitation is associated to the meridional migration of Intertropical Convergence Zone (ITCZ). Climate in NEB changed during the Holocene, although paleoclimatic interpretations are still controversial due to small number of studies. This study contribute to the discussion about paleoclimatic and paleoenvironmental changes of NEB by using geochemistry, micropaleontological, biogeochemistry and deuterium and carbon isotope analyses in lacustrine sediments and bat guano, and also speleothem isotope records from middle to late Holocene.Studies from Boqueirão Lake suggested that its formation occurred due to the fluvio-eolian dynamic, which resulted in blockage of fluvial channels during the holocenic humid period. Transition between fluvial and lacustrine system recorded the barrage formation and was defined around 4,500 years BP and suggested by the substitution of fluvial sponge spicules to lacustrine diatoms, mainly Mastogloia smithii var. lacustres, preserved in sediments. These data demonstrated that depth fluctuations of Boqueirão Lake were not associated to local precipitation accumulation.Paleoclimatic changes were reconstructed from Boqueirão Lake and Trapiá Cave based on δD of n-alkanoic acids of 28 carbons, which are produced by terrestrial (Wang et al., 2004;Cruz et al., 2005Cruz et al., , 2006; Van-Breukelen et al., 2008;Bird et al., 2011; Stríkis et al., 2011;Kanner et al., 2012;Novello et al., 2012; Mosbleach et al., 2012; , 2005, 2006) e no oeste da bacia amazônica e nos altiplanos andinos Mosbleah et al., 2012;.O aumento da insolação de verão austral é acompanhado pela redução da insolação de verão boreal. Esse padrão antifásico do balanço radiativo estabelecido nas relações inter-hemisférica é observado na comparação entre os registros de espeleotemas associados à atividade do SMAS com os registros da sudeste da China, associadas às monções asiáticas (Wang et al., 2001(Wang et al., , 2004(Wang et al., , 2006 Novello et al., 2012). A maior pa...

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Guano-derived δ13C-based paleo-hydroclimate record from Gaura cu Musca Cave, SW Romania

Cited by 37 publications

References 39 publications

A Late Holocene environmental history of a bat guano deposit from Romania: an isotopic, pollen and microcharcoal study

A Late Holocene environmental history of a bat guano deposit from Romania: an isotopic, pollen and microcharcoal study

The biogeochemistry of insectivorous cave guano: a case study from insular Southeast Asia

Variações paleoambientais e paleoclimáticas durante o holoceno no Rio Grande do Norte a partir do estudo de registros geoquímicos de sedimentos de lagos e cavernas

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