Balancing selection preserves variation at the self-incompatibility locus (S-locus) of flowering plants for tens of millions of years, making it possible to detect demographic events that occurred prior to the origin of extant species. In contrast…
Papers in Ornithology
Ornithology papers in Biological Sciences, A
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The Nuclear and Technological Institute (Instituto Tecnolgico e Nuclear-ITN) in cooperation with the International Atomic Energy Agency (IAEA) has been conducting a nationwide survey of hydrogen (H-2/H-1) and oxygen (O-18/O-16) isotopic composition…
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I compared understory bird community structure and composition among primary, slightly disturbed, and moderately disturbed forest in the East Usambara Mountains in Tanzania. Comparisons were conducted at two spatiotemporal scales: short term,…
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The numbers of common cranes (Grus grus) staging and wintering at Laguna de Gallocanta (Gallocanta), northeastern Spain, have increased throughout the period 1970-90. Consequently, we modelled the use of this area by cranes using Box-Jenkins Time…
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Decadal and centennial mean state changes in South American summer monsoon (SASM) precipitation during the last 2,300 years are detailed using an annually resolved authigenic calcite record of precipitation δ(18)O from a varved lake in the Central…
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Background/Question/Methods The Adirondack Mountains of New York State hold the southernmost communities of alpine vegetation in the eastern United States. Containing the greatest concentration of rare and endangered species found in New York State,…
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Widespread concerns about global biodiversity loss have led to a growing demand for indices of biodiversity status. Today, climate change is among the most serious threats to global biodiversity. Although many studies have revealed phenological…
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A 2 x 2 achievement goal framework comprising mastery-approach, mastery-avoidance, performance-approach, and performance-avoidance goals was proposed and tested in 3 studies. Factor analytic results supported the independence of the 4 achievement…
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Fossil pollen and charcoal analyses of sediments from Lake Titicaca, Peru/Bolivia, provide a record of palaeoclimatic variation spanning four full glacial cycles. Pollen, aquatic microfossils, and charcoal, as well as previously published data…
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Well-preserved remains of bone, tissue, and eggshell of Adélie Penguin (Pygoscelis adeliae) have been recovered from numerous abandoned colonies in the Ross Sea region, Antarctica. Radiocarbon dates on these remains provide an occupation history for…
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We present a well-dated, high-resolution, similar to 45 kyr lake sediment record reflecting regional temperature and precipitation change in the continental interior of the Southern Hemisphere (SH) tropics of South America. The study site is Laguna…
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Introduction: Computer simulations suggest that intercellular coupling is more robust than membrane excitability with regard to changes in and safety of conduction. Clinical studies indicate that SCN5A (excitability) and/or Connexin43 (Cx43,…
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A pollen, sediment, and tephra record from a drained swamp at Harataonga contains a history of the local coastal environment from the Mid Holocene. This commences c. 6000 cal yr BP in a freshwater environment with swamp forest composed mainly of…
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We investigated 17 abandoned Adélie penguin (Pygoscelis adeliae) colonies in the Windmill Islands, East Antarctica, in summer 2002/03. Forty radiocarbon dates on penguin bones and eggshells from 13 of these sites indicate a near continuous…
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No Brasil, o ensino de ciências ainda está vinculado ao livro didático, existindo uma tradicional valorização das ati- vidades de leitura, exercícios teóricos e aulas expositivas. Co- mo método alternativo no ensino dos conteúdos formais e na in-…
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Seventeen wetland bird counts were conducted from November 1998 to March 1999 in two 52 ha rice paddies using no-tillage and mix (modified water-seed) planting techniques at Major Isidro rice field, Granja Quatro Irmãos ranch, in southern Brazil. A…
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A avifauna da região de Vila Bela da Santíssima Trindade (incluindo aí o município de Pontes e Lacerda), Mato Grosso, foi amostrada no final do mês de julho de 1997. Para este levantamento foram utilizados diferentes métodos, que resultaram num…
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A Serra do Tabuleiro, em Santa Catarina, é uma das áreas menos afetadas pelas atividades humanas no sul do Brasil. Ela é terceiro maior remanescente da Floresta Atlântica Brasileira. Informações sobre a avifauna e uma lista com 270 espécies…
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We present new data on the avifauna of Ibitipoca State Park and adjacent areas, in Minas Gerais, south- east Brazil. We also critique some previous records from the area and comment on the biogeography and conservation of its avifauna. We recorded…
Papers in associated sub-disciplines
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