Paläontologie, Geobiologie
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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, ... -
Gradual warming prior to the end‐Permian mass extinction
; ; ; ; ; ; ; (Palaeontology, 2022-09-06)
The biggest known mass extinction in the history of animal life occurred at the Permian–Triassic boundary and has often been linked to global warming. Previous studies have suggested that a geologically rapid (<40 kyr) ... -
Clockwise hysteresis of diatoms in response to nutrient dynamics during eutrophication and recovery
; ; ; ; ; (Limnology and Oceanography, 2022-07-28)
Many lake ecosystems that have been severely disturbed by eutrophication, have also experienced large human efforts to restore “natural” conditions. However, the trajectories and the extent of recovery of these lake ... -
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. ... -
The first belemnite of boreal ancestry from the Early Cretaceous (Valanginian) of the western Tethys: implications for belemnite ecology
; ; (Papers in Palaeontology, 2022-07-17)
The first occurrence of the belemnite species Liobelus acrei (formerly Acroteuthis acrei) is reported from the Lower Cretaceous (Valanginian) of the Vocontian Basin (VB; south‐east France). This first record of the genus ... -
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 ... -
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 ... -
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 ... -
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 ... -
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 ... -
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 ... -
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, ... -
Always ready? Primary production of Arctic phytoplankton at the end of the polar night
(Limnology and Oceanography Letters, 2021-11-11)
The end of the polar night with the concurrent onset of photosynthetic biomass production ultimately leads to the spring bloom, which represents the most important event of primary production for the Arctic marine ecosystem. ... -
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. ... -
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 ... -
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 ... -
Conch geometry, ontogeny and dimorphism in the Early Bajocian ammonoid Stephanoceras from Normandy, France
; (Lethaia, 2021-07-22)
A large suite of specimens belonging to the Early Bajocian Stephanoceras from Évrecy (Normandy, France) displays wide variation in conch and sculpture. The quantitative analysis of the conch geometry and its ontogeny on ... -
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 ... -
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, ... -
Dispersal, location of bloom initiation, and nutrient conditions determine the dominance of the harmful dinoflagellate Alexandrium catenella: A meta‐ecosystem study
;; (Limnology and Oceanography, 2021-09-27)
Harmful algal blooms (HABs) are globally increasing in number and spatial extent. However, their propagation dynamics along environmental gradients and the associated interplay of abiotic factors and biotic interactions ... -
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 ... -
As above, so below? Effects of fungicides on microbial organic matter decomposition are stronger in the hyporheic than in the benthic zone
; ; ; ; ; ; ; (Limnology and Oceanography, 2021-11-16)
Microbial organic matter decomposition is a critical ecosystem function, which can be negatively affected by chemicals. Although the majority of organic matter is stored in sediments, the impact of chemicals has exclusively ... -
Highlighting Theodor W. Engelmann's “Farbe und Assimilation” [Color and Assimilation]
(Limnology and Oceanography Bulletin, 2021-10-22)
In 1883, Theodor Wilhelm Engelmann, a German scientist, wrote his essay “color and assimilation” (Ger.: “Farbe und Assimilation”) describing the state of the art in photosynthesis research, his recent findings, and further ... -
Changes in spectral quality of underwater light alter phytoplankton community composition
; ; (Limnology and Oceanography, 2021-07-02)
Light is a fundamental resource for phytoplankton. To utilize the available light, most phytoplankton species possess pigments in taxon‐specific combinations and quantities, which in turn result in a specific use of certain ... -
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 ...
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