Auflistung Paläontologie, Geobiologie nach Titel
Anzeige der Dokumente 235-254 von 380
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Non-lithistid fossil Demospongiae - origins of their palaeobiodiversity and highlights in history of preservation
(Systema Porifera : a guide to the classification of sponges. Vol. 1: Introductions and Demospongiae, 2002)Available evidence suggests that the first demosponges occur in the Late Proterozoic, with forms characterized by bundles of long monaxonic spicules. In the Middle Devonian the first modern forms of Dendroceratida, ... -
Nonmarine Ostracoda as proxies in (geo‐)archaeology — A review
(Geoarchaeology, 2022-05-03)Ostracods as bioindicators are extremely useful for reconstructing palaeoenvironment and palaeoclimate and can also indicate the provenance of sediments and materials, for example, in studies on ancient commercial networks. ... -
Normalograptus kufraensis, a new species of graptolite from the western margin of the Kufra Basin, Libya
(Geological Magazine, 2013)Normalograptus kufraensis sp. nov. occurs as monospecific assemblages in the Tanezzuft Formation at the western margin of the Kufra Basin (Jabal Eghei), southern Libya. These graptolites have parallel-sided rhabdosomes ... -
Not herbs and forbs alone: pollen‐based evidence for the presence of boreal trees and shrubs in Cis‐Baikal (Eastern Siberia) derived from the Last Glacial Maximum sediment of Lake Ochaul
(Journal of Quaternary Science, 2021-03-16)A new accerator mass spectrometry (AMS)‐dated sedimentary record from Lake Ochaul (54°14′N, 106°28′E; 641 m a.s.l.) in Eastern Siberia covers the interval from ca. 27 850 to 20 400 cal a bp at ca. 180‐year resolution and ... -
NPP-ID: Non-Pollen Palynomorph Image Database as a research and educational platform
(Vegetation History and Archaeobotany, 2021-08-30)Non-pollen palynomorphs (NPPs) form a large group of biological objects found in palynological slides besides pollen grains. This includes various remains of algae and fungi, shells, resting stages and eggs of invertebrates, ... -
Nutrient and Silicon Isotope Dynamics in the Laptev Sea and Implications for Nutrient Availability in the Transpolar Drift
(Global Biogeochemical Cycles, 2022-09-23)Realistic prediction of the near‐future response of Arctic Ocean primary productivity to ongoing warming and sea ice loss requires a mechanistic understanding of the processes controlling nutrient bioavailability. To ... -
Nutrient co‐limitation in the subtropical Northwest Pacific
(Limnology and Oceanography Letters, 2021-08-17)Nutrients limiting phytoplankton growth in the ocean are a critical control on ocean productivity and can underpin predicted responses to climate change. The extensive western subtropical North Pacific is assumed to be ... -
Nutrient regulation of late spring phytoplankton blooms in the midlatitude North Atlantic
(Limnology and Oceanography, 2019)The duration and magnitude of the North Atlantic spring bloom impacts both higher trophic levels and oceanic carbon sequestration. Nutrient exhaustion offers a general explanation for bloom termination, but detail on which ... -
Oberordovizische (?) Favositida aus dem Kaolinsand von Braderup/Sylt
(Fossilien von Sylt /Bd.3Fossilien von Sylt /Bd.3, 1990) -
Oberordovizische (?) Favositida aus dem Kaolinsand von Braderup/Sylt
(Fossilien von Sylt, Bd. 3, 1990) -
Oldest entirely preserved sponges and other fossils from the Lowermost Cambrian and a new facies reconstruction of the Yangtze platform (China)
(Berliner geowissenschaftliche Abhandlungen, 1993)Eine Faziesrekonstruktion W1d Korrelation obersinischer-unterkambrischer Schichten der Yangtze-Plattform (Südchina) wird vorgestellt. Dabei wird zwischen geschütztem Becken, Schwelle W1d tiefem Becken unterschieden. Die ... -
Oligocene vegetation of Europe and western Asia—Diversity change and continental patterns reflected by plant functional types
(Geological Journal, 2020)Spatial vegetation patterns potentially reflect coeval continental climate variations which are also impacted by palaeogeographical settings. Plant functional types (PFTs) and their distribution, frequently applied in ... -
On the present habitats and ecology of Vertigo pseudosubstriata Ložek, 1954 (Mollusca, Gastropoda, Vertiginidea) in Central Asia and its distribution history in Central and Eastern Europe
(Journal of Quaternary Science, 2021-06-07)The small terrestrial gastropod Vertigo pseudosubstriata Ložek, 1954 is one of the rarest glacial indicator species in the Pleistocene of Central and Eastern Europe. In all, this species has been found at only about 15 ... -
On the trail of iron uptake in ancestral Cyanobacteria on early Earth
(Geobiology, 2022-07-30)Cyanobacteria oxygenated Earth's atmosphere ~2.4 billion years ago, during the Great Oxygenation Event (GOE), through oxygenic photosynthesis. Their high iron requirement was presumably met by high levels of Fe(II) in the ... -
Overlooked Implication of Sediment Transport at Low Flow: Migrating Ripples Modulate Streambed Phototrophic and Heterotrophic Microbial Activity
(Water Resources Research, 2021-03-17)Sandy streambeds are mobile even at low flow velocities at which sediments can be transported as bedload, more specifically as migrating ripples. Small variations in discharge can result in transitions between sediment ... -
Oxygen isotope fractionation in marine aragonite of coralline sponges
(Geochimica et cosmochimica acta, 2000) -
Oxygen isotope fractionation in marine aragonite of coralline sponges
(Geochimica et cosmochimica acta, 2000)