Auflistung Paläontologie, Geobiologie nach Erscheinungsdatum
Anzeige der Dokumente 41-60 von 380
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Millimetre scale aeration of the rhizosphere and drilosphere
(European Journal of Soil Science, 2022-07-06)Soil aeration is a critical factor for oxygen‐limited subsoil processes, as transport by diffusion and advection is restricted by the long distance to the free atmosphere. Oxygen transport into the soil matrix is highly ... -
Mixed Layer Depth Promotes Trophic Amplification on a Seasonal Scale
(Geophysical Research Letters, 2022-06-16)The Humboldt Upwelling System is of global interest due to its importance to fisheries, though the origin of its high productivity remains elusive. In regional physical‐biogeochemical model simulations, the seasonal amplitude ... -
Mesocrystalline Architecture in Hyaline Foraminifer Shells Indicates a Non‐Classical Crystallisation Pathway
(Geochemistry, Geophysics, Geosystems, 2022-06-15)Calcareous foraminifer shells (tests) represent one of the most important archives for paleoenvironmental and paleoclimatic reconstruction. To develop a mechanistic understanding of the relationship between environmental ... -
Testing the usefulness of optical data for zooplankton long‐term monitoring: Taxonomic composition, abundance, biomass, and size spectra from ZooScan image analysis
(Limnology and Oceanography: Methods, 2022-05-28)The pelagic ecosystem of the Arctic Ocean is threatened by severe changes such as the reduction in sea‐ice coverage and increased inflow of warmer Atlantic water. The latter is already altering the zooplankton community, ... -
Palaeoecological signals for Mesolithic land use in a Central European landscape?
(Journal of Quaternary Science, 2022-05-12)During the Early Holocene, climate was the major factor causing fires, but whether during the Mesolithic (~11.5–7.4 cal ka BP) people co‐shaped their environment by means of fire remains of debate. Few studies have tackled ... -
Late Quaternary paleoenvironmental reconstructions from sediments of Lake Emanda (Verkhoyansk Mountains, East Siberia)
(Journal of Quaternary Science, 2022-05-06)Continuous pollen and chironomid records from Lake Emanda (65°17′N, 135°45′E) provide new insights into the Late Quaternary environmental history of the Yana Highlands (Yakutia). Larch forest with shrubs (alders, pines, ... -
The detection of bacterial exometabolites in marine dissolved organic matter through ultrahigh‐resolution mass spectrometry
(Limnology and Oceanography: Methods, 2022-05-05)Bacteria play a key role in sustaining the chemodiversity of marine dissolved organic matter (DOM), yet there is limited direct evidence of a major contribution of bacterial exometabolites to the DOM pool. This study tests ... -
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. ... -
Flexible habitat choice of pelagic bacteria increases system stability and energy flow through the microbial loop
(Limnology and Oceanography, 2022-04-19)Pelagic bacteria can be classified into free‐living and particle‐attached life modes, which either dwell in the water column or attach to suspended particles. Bacteria with a generalist life style, however, can actively ... -
Taxonomy and diversity of slit‐band gastropods (Order Pleurotomariida) and some slit bearing Caenogastropoda from the Pennsylvanian of the USA
(Papers in Palaeontology, 2022-04-11)Pleurotomariida have the longest fossil record among living gastropods and are diverse and abundant in the middle and upper Palaeozoic. Its traditional classification is based on adult shell characters. The early shell ... -
Sedimentary DNA identifies modern and past macrophyte diversity and its environmental drivers in high‐latitude and high‐elevation lakes in Siberia and China
(Limnology and Oceanography, 2022-03-16)Arctic and alpine aquatic ecosystems are changing rapidly under recent global warming, threatening water resources by diminishing trophic status and changing biotic composition. Macrophytes play a key role in the ecology ... -
Distribution, drivers and population structure of the invasive alien snail Tarebia granifera in the Luvuvhu system, South Africa
(River Research and Applications, 2022-02-03)Invasive alien species continue to spread and proliferate in waterways worldwide, but environmental drivers of invasion dynamics lack assessment. Knowledge gaps are pervasive in the Global South, where the frequent heavy ... -
Variation in the predictability of lake plankton metric types
(Limnology and Oceanography, 2022-02-02)Statistical and climate models are frequently used for biodiversity projections under future climatic changes, but their predictive capacity for freshwater plankton may vary among different species and community metrics. ... -
Growth of microaerophilic Fe(II)‐oxidizing bacteria using Fe(II) produced by Fe(III) photoreduction
(Geobiology, 2022-01-11)Iron(II) (Fe(II)) can be formed by abiotic Fe(III) photoreduction, particularly when Fe(III) is organically complexed. Light‐influenced environments often overlap or even coincide with oxic or microoxic geochemical conditions, ... -
Effects of Reversal of Water Flow in an Arctic Floodplain River on Fluvial Emissions of CO2 and CH4
(Journal of Geophysical Research: Biogeosciences, 2022-01-04)When organic matter from thawed permafrost is released, the sources and sinks of greenhouse gases (GHGs), like carbon dioxide (CO2) and methane (CH4) in Arctic rivers will be influenced in the future. However, the temporal ... -
Temporal declines in Wadden Sea phytoplankton cell volumes observed within and across species
(Limnology and Oceanography, 2021-12-27)Cell size is a master trait in the functional ecology of phytoplankton correlating with numerous morphological, physiological, and life‐cycle characteristics of species that constrain their nutrient use, growth, and ... -
Cave paleozoology in the Judean Desert: assembling records of Holocene wild mammal communities
(Journal of Quaternary Science, 2021-12-24)Long temporal records of Holocene wild mammal communities are essential to examine the role of human impacts and climatic fluctuations in the configuration of modern ecosystems. We show that such records can be assembled ... -
Cryptogamic organisms are a substantial source and sink for volatile organic compounds in the Amazon region
(Communications Earth & Environment, 2021-12-21)Cryptogamic organisms such as bryophytes and lichens cover most surfaces within tropical forests, yet their impact on the emission of biogenic volatile organic compounds is unknown. These compounds can strongly influence ... -
Identifying Global‐Scale Patterns of Vegetation Change During the Last Deglaciation From Paleoclimate Networks
(Paleoceanography and Paleoclimatology, 2021-12-20)During the last deglaciation (∼19–11 ka before present), the global mean temperature increased by 3–8 K. The concurrent hydroclimate and land cover changes are not well constrained. Here, we use a pollen database to quantify ... -
The Impact of Typhoon “Mangkhut” on Surface Water Nutrient and Chlorophyll Inventories of the South China Sea in September 2018
(Journal of Geophysical Research: Biogeosciences, 2021-12-14)The influence of the exceptionally strong typhoon Mangkhut on the availability of nutrients and changes in primary production were studied in the northern South China Sea in September 2018. A tight station grid was sampled ...