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Registros recuperados: 15
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A Holocene pollen record of savanna establishment in coastal Amapá Anais da ABC (AABC)
Toledo,Mauro B. de; Bush,Mark B..
The main goal of this study was to investigate how climate and human activities may have influenced ecotonal areas of disjoint savannas within Brazilian Amazonia. The fossil pollen and charcoal records of Lake Márcio (Amapá) were used to provide a Holocene palaeoecological history of this region. Detrended correspondence analysis (DCA) was used to enhance the patterns of sample distribution along the sediment core. A marked vegetation change from closed forests with swamp elements to open flooded savanna at c. 5000 yrs BP was evident from the pollen record. Charcoal analysis revealed a pattern of increased accumulation of particles coincident with the establishment of savannas, suggesting higher fire frequency and human impacts near the lake. A 550-year...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Pollen record; Palaeofires; Amazonia; Savannas; Climate change; Palaeoecology.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652008000200013
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Attempts to predate on gadid fish otoliths demonstrated by naticid gastropod drill holes from the Neogene of Mill-Langenboom, The Netherlands Naturalis
Gaemers, P.A.M.; Langeveld, B.W..
Incomplete drill holes produced by naticid snails are occasionally found in late Cenozoic gadid otoliths from the North Sea Basin. Among the Neogene otoliths found at Mill-Langenboom naticid drill holes are relatively common. Their occurrence is linked to strata that formed under reduced rates of sedimentation and/or that reflect non-sedimentation and erosion. The Upper Miocene–Upper Pliocene deposits at Mill-Langenboom (province of Noord-Brabant, the Netherlands) constitute a condensed sequence comprising most North Sea Basin stages of this interval from the Gramian to the end of the Pliocene, as demonstrated by index taxa amongst gadid otoliths, with a considerable hiatus between Miocene and Pliocene strata. The lag deposit at the base of the Pliocene...
Tipo: Article / Letter to the editor Palavras-chave: Miocene; Pliocene; Noord-Brabant; Palaeoecology; Biostratigraphy; Chronostratigraphy; North Sea Basin.
Ano: 2015 URL: http://www.repository.naturalis.nl/record/607550
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Avian biogeography on western Indian Ocean islands: eustatic sea levels, geological events and anthropogenic changes Naturalis
Hume, J.P..
The south-western Indian Ocean islands, excluding the microcontinent of Madagascar, are geologically complex and diverse. They have been subject to drastic sea level changes, volcanic events and anthropogenic changes, all of which have contributed to confuse understanding of their avian biogeography. An array of factors have affected these avifaunas, based on palaeontological, historical and molecular evidence,which together have shown that avian biogeography is not congruent with the relative age and size of the islands.
Tipo: Article / Letter to the editor Palavras-chave: Aves; Biogeography; Indian Ocean; Palaeoecology; Geology; 42.83; 42.65.
Ano: 2011 URL: http://www.repository.naturalis.nl/record/428484
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Brachiopods from the Valdeteja Formation (Pennsylvanian; Cantabrian Mountains, NW Spain) Naturalis
Martínez Chacón, M.L.; Winkler Prins, C.P..
After a short introduction on the lower Pennsylvanian (Bashkirian to lowermost Moscovian)Valdeteja Formation in its stratigraphical context, an overview of its brachiopod faunas is presented and their palaeoecological and palaeogeographic importance discussed. Two new genera of the Strophalosiidina, showing adaptations to a reef environment, are described. The genus Ovetina (type species O. truyolsi gen. et sp. nov.) is an aulostegid with a well developed ventral flange. Miroproductus (type species M. posadai gen. et sp. nov.) is an early richthofenioid, probably derived from an aulostegid such as Institina MUIR-WOOD & COOPER, 1960.
Tipo: Article / Letter to the editor Palavras-chave: Brachiopods; Strophalosiidina; Valdeteja Formation; Palaeoecology; Upper Bashkirian; Cantabrian Mountains; Spain; 42.72; 38.22.
Ano: 2009 URL: http://www.repository.naturalis.nl/record/499036
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Charcoal anatomy of Brazilian species. I. Anacardiaceae Anais da ABC (AABC)
GONÇALVES,THAÍS A.P.; SCHEEL-YBERT,RITA.
ABSTRACT Anthracological studies are firmly advancing in the tropics during the last decades. The theoretical and methodological bases of the discipline are well established. Yet, there is a strong demand for comparative reference material, seeking for an improvement in the precision of taxonomic determination, both in palaeoecological and palaeoethnobotanical studies and to help preventing illegal charcoal production. This work presents descriptions of charcoal anatomy of eleven Anacardiaceae species from six genera native to Brazil (Anacardium occidentale, Anacardium parvifolium, Astronium graveolens, Astronium lecointei, Lithrea molleoides, Schinus terebenthifolius, Spondias mombin, Spondias purpurea, Spondias tuberosa, Tapirira guianensis, and Tapirira...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Anthracology; Archaeobotany; Charcoal; Palaeoecology; Environmental conservation; Wood anatomy.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000501711
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Conodont faunas across the mid-Carboniferous boundary from the Barcaliente Formation at La Lastra (Palentian Zone, Cantabrian Mountains, northwest Spain); geological setting, sedimentological characters and faunal descriptions Naturalis
Nemyrovska, T.I.; Wagner, R.H.; Winkler Prins, C.F.; Montañez, I..
Two different tectono-stratigraphic domains are recognised in the Cantabrian Mountains, Asturian-Leonese (Cantabrian Zone) and Palentian (Palentian Zone). The area under investigation belongs to the southern part of the Palentian Domain and attention is focused on the Upper Viséan to lowermost Bashkirian limestones at the village of La Lastra in northern Palencia. A new geological map of the Palentian Zone is accompanied by a more detailed map centred on La Lastra. The Barcaliente Limestone Formation (Serpukhovian to lowermost Bashkirian) occurs in the overturned limb of a recumbent anticline which constitutes the head of a south-verging major thrust unit, the Carrionas Thrust Sheet (Palentian Zone). It shows here a shallowing trend in the Serpukhovian....
Tipo: Article / Letter to the editor Palavras-chave: Serpukhovian; Bashkirian; Biostratigraphy; Palaeoecology; 42.65; 38.16.
Ano: 2011 URL: http://www.repository.naturalis.nl/record/428483
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Epi-bathyal ostracod assemblage in Holocene Rhone deltaic sediments (Gulf of Lions, NW Mediterranean) and their palaeoecological implications ArchiMer
Fanget, Anne-sophie; Bassetti, Maria Angela; Berne, Serge; Arnaud, Mireille.
Since the Last Glacial Maximum, the Rhone River, which is the most important source of freshwater and sediment to the western Mediterranean Sea, migrated in a north-westward direction during the rapid Deglacial and Early Holocene sea-level rise. During the phase of global high sea-level (Middle and Late Holocene), an overall eastward migration of the Rhone outlet, under natural and/or human influence, is recorded through several sediment accumulations confined along the inner shelf in the form of deltaic lobes. These lobes that make up the whole Rhone subaqueous delta represent very expanded sedimentary archives of the Rhone Holocene history. In this paper, using three long piston cores retrieved from the most recent Bras de Fer (RHS-KS55) and Roustan...
Tipo: Text Palavras-chave: Ostracodes; Delta sous-marin; Paléoécologie; Holocène; Méditerranée occidentale; Ostracoda; Subaqueous delta; Palaeoecology; Holocene; Western Mediterranean..
Ano: 2013 URL: http://archimer.ifremer.fr/doc/00217/32810/31253.pdf
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Insectivore faunas from the Lower Miocene of Anatolia - Part 8: Stratigraphy, palaeoecology, palaeobiogeography Naturalis
Hoek Ostende, L.W. van den.
This article deals with biostratigraphy, palaeoecology and biogeography of the Late Oligocene/Early Miocene insectivore faunas from Anatolia. With the exception of the much younger fauna from Keseköy, all faunas contain the same insectivore species. Keseköy contains the same genera, but mostly different species. It has been suggested that insectivores are of limited stratigraphical use due to the longevity of the taxa. This seems to hold true for the Early Miocene faunas from Anatolia. Changes in the composition of the insectivore faunas are used to infer environmental changes. A rise in the abundance of insectivores near the MP 30/MN 1 transition is believed to be indicative of a climatic amelioration. The dominance of Theratiskos in Harami and Keseköy...
Tipo: Article / Letter to the editor Palavras-chave: Insectivora; Anatolia; Early Miocene; Biostratigraphy; Palaeoecology; Palaeobiogeography; 42.84; 38.22.
Ano: 2001 URL: http://www.repository.naturalis.nl/record/219157
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Late Viséan/early Serpukhovian conodont succession from the Triollo section, Palencia (Cantabrian Mountains, Spain) Naturalis
Nemyrovska, T.I.; Samankassou, E..
The present study reports upon the conodont faunas of the uppermost lower Viséan (Carrión unit) through the lower Serpukhovian (Peña unit) deep water Triollo section, Cantabrian Mountains, Palencia, Spain. The condensed succession of grey, laminate, nodular and cherty limestones with marl intercalations contains abundant and diverse conodont faunas. Three new species of Vogelgnathus, V. cantabricus, V. palentinus and V. triolloensis, as well as one new species and one new subspecies of Gnathodus, Gn. boogaardi and Gnathodus girtyi pyrenaeus Nemyrovska & Perret subsp. nov., are described. All stratigraphically important taxa for the studied interval are described. Four conodont zones are distinguished, three in the Viséan, Gnathodus praebilineatus, Gn....
Tipo: Article / Letter to the editor Palavras-chave: Conodonts; Carboniferous; Viséan; Cantabrian Mountains; Biostratigraphy; Palaeoecology; 42.80.
Ano: 2005 URL: http://www.repository.naturalis.nl/record/210101
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Plant succession in a forest on the Lower Northeast Slope of Serra Geral, Rio Grande do Sul, and Holocene palaeoenvironments, Southern Brazil Acta Botanica
Leal,Márcia Grala; Lorscheitter,Maria Luisa.
The study of plant succession provides information on vegetation dynamics of a region and, therefore, improves our understanding of the natural trends of present ecosystems. With this objective, plant succession based on palynology of a sediment profile in a swamp forest was studied on the Lower Northeast Slope of Serra Geral, Rio Grande do Sul. Samples were treated with HCl, HF, KOH and acetolysis; slides were mounted in glycerol-jelly. For each sample a minimum of 500 grains of pollen + pteridophyte and bryophyte spores was counted and other palynomorphs were counted in parallel. Tilia and Tilia Graph software were used to construct percentage and concentration diagrams, with three 14C datings. The results show a local water reservoir in the beginning of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Palynology; Palaeoecology; Plant migration; Quaternary; South America.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062007000100001
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[Proceedings of the 5th Symposium on Mesozoic and Cenozoic Decapod Crustaceans, Krakow, Poland, 2013: A tribute to Pál Mihály Müller / R.H.B. Fraaije, M. Hyžný, J.W.M. Jagt, M. Krobicki & B.W.M. van Bakel (eds.)]: Dynomenid crabs (Decapoda, Brachyura) and stalked barnacles (Cirripedia, Scalpelliformes) from upper Cenomanian-lower Turonian nearshore, shallow-water strata in the Bohemian Cretaceous Basin, Czech Republic Naturalis
Kočová Veselská, M.; Kočí, T.; Kubajko, M..
Crustacea (dynomenid crabs and cirripedes) from the upper Cenomanian-lower Turonian nearshore, shallow-water bioclastic limestones to marly siltstones found along the southern and eastern margins of the Bohemian Cretaceous Basin (BCB) are described. Crabs are rather rare in this area, and mostly restricted to fragmentary pereiopods, i.e., isolated claws or dactyli. In view of the confused taxonomy of isolated claws, their proper identity could not be determined; they were mostly referred to the necrocarcinid genus Necrocarcinus Bell, 1863. A recent re-examination of material deposited in the collections of the National Museum (Národní Muzeum, Prague), and of new finds, has revealed that all allegedly necrocarcinid pereiopods and nearly all carapaces from...
Tipo: Article / Letter to the editor Palavras-chave: Dromioidea; Graptocarcininae; Thoracica; Upper Cretaceous; Palaeoecology; 42.74; 38.22.
Ano: 2014 URL: http://www.repository.naturalis.nl/record/523864
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Significado paleobiológico y paleoambiental de las concentraciones holocenas de Heleobia (Gastropoda) presentes en el sudeste de la provincia de Buenos Aires. OceanDocs
De Francesco, C.G..
The aim of the present work is to determine the paleobiological and paleoenvironmental significance of fossil concentrations of Heleobia Stimpson, 1865 (Gastropoda) deposited during the last transgressiveregressive cycle along the Atlantic coast. The work was divided into two stages : 1) the analysis of living populations of H. australis (d'Orbigny), I-1. conexa (Gaillard) and H. parchappii (d'Orbigny) in two estuarine environments from the southeastern coast of the Buenos Aires Province (Mar Chiquita coastal lagoon and Quequen Grande estuary) in order to know the range of variation of the main biological and ecological factors and 2) the paleoecological analysis of three holocene sequences from the same region (mouth of the Quequen Grande River, Mouth of...
Tipo: Theses and Dissertations Palavras-chave: Palaeoenvironments; Palaeoecology; Spatial variations; Comparative studies; Taxonomy; Morphometry; Abundance; Taxonomy; Http://aims.fao.org/aos/agrovoc/c_7631.
Ano: 2002 URL: http://hdl.handle.net/1834/2971
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Splendid oddness: revisiting the curious trophic relationships of South American Pleistocene mammals and their abundance Anais da ABC (AABC)
FARIÑA,RICHARD A.; CZERWONOGORA,ADA; GIACOMO,MARIANA DI.
The South American Pleistocene mammal fauna includes great-sized animals that have intrigued scientists for over two centuries. Here we intend to update the knowledge on its palaeoecology and provide new evidence regarding two approaches: energetics and population density and relative abundance of fossils per taxa. To determine whether an imbalance exists, population density models were applied to several South American fossil faunas and the results compared to those that best describe the palaeoecology of African faunas. The results on the abundance study for Uruguay and the province of Buenos Aires during the Lujanian stage/age reveal that bulk-feeding ground sloths (Lestodon and Glossotherium) were more represented in the first territory, while the more...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Abundance; Megafauna; Palaeoecology; Population density; Secondary productivity; Quaternary.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000100311
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Swerving as the escape strategy of Macrauchenia patachonica Owen (Mammalia; Litopterna) Ameghiniana
Fariña,Richard A.; Blanco,R. Ernesto; Christiansen,Per.
The Lujanian megamammals (late Pleistocene of South America) show many palaeoautecological peculiarities. The present paper studies one of them, the locomotor habits of Macrauchenia patachonica Owen, through those morphological features related with its possible antipredation strategy. To avoid predation (especially by the sabre-tooth Smilodon Lund), this large litoptern seems to have been particularly adapted to swerving behaviour. This is suggested by the fact that its limb bones have indicators of higher transverse than anteroposterior strength (significantly so in the case of the femur), a feature which is also observed in modern swervers, and not so clearly in other fast running herbivores that do not use swerving so much.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Palaeoecology; Megafauna; Pleistocene; South America; Biomechanics; Locomotion.
Ano: 2005 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0002-70142005000400007
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The nature of aquatic landscapes in the Miocene of western Amazonia: an integrated palaeontological and geochemical approach Naturalis
Wesselingh, F.P.; Kaandorp, R.J.G.; Vonhof, H.B.; Räsänen, M.E.; Renema, W.; Gingras, M..
The Miocene Pebas Formation from the section Santa Rosa de Pichana (Loreto, Peru) was investigated using a combination of analyses of sedimentary facies, molluscan communities and taphonomy, and stable isotopes of both entire shells and growth bands in bivalves. Three sequences, comprising a succession of transgressive, maximum flooding and regressive/prograding intervals, are documented. Molluscs are most common in the transgressive/highstand intervals and are almost absent in regressive/prograding intervals. The fauna is dominated by endemic Pebasian species, such as Pachydon and Dyris spp. The nature of the deposits as well as the availability of oxygen varied in a predictable way within each of the sequences and determined the nature of the...
Tipo: Article / Letter to the editor Palavras-chave: Miocene; Amazonia; Palaeoecology; Sedimentology; Stable isotopes; 38.22; 42.73.
Ano: 2006 URL: http://www.repository.naturalis.nl/record/209732
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