Paläontologie, Geobiologie
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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. ... -
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 ... -
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 ... -
Neanderthals of Porto Selvaggio in southern Italy: lithic industry of Grotta Torre dell'Alto (Nardò, Lecce)
; ; (Journal of Quaternary Science, 2021-10-18)
Porto Selvaggio in southern Italy is where the Uluzzian culture was first identified and documented, providing key insights into the transition from the Middle to the Upper Paleolithic. The area has also yielded evidence ... -
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 ... -
Environmental Regulation of the Nitrogen Supply, Mean Trophic Position, and Trophic Enrichment of Mesozooplankton in the Mekong River Plume and Southern South China Sea
; ; ; ; ; ; ; ; ; (Journal of Geophysical Research: Oceans, 2021-08-22)
The mean trophic position (TP) of mesozooplankton largely determines how much mass and energy is available for higher trophic levels like fish. Unfortunately, the ratio of herbivores to carnivores in mesozooplankton is ... -
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 ... -
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 ... -
Leaf Wax Hydrogen Isotopes as a Hydroclimate Proxy in the Tropical Pacific
; ; ; ; ; ; ; ; ; (Journal of Geophysical Research: Biogeosciences, 2021-03-25)
Hydrogen isotope ratios of sedimentary leaf waxes (δ2HWax values) are increasingly used to reconstruct past hydroclimate. Here, we add δ2HWax values from 19 lakes and four swamps on 15 tropical Pacific islands to an updated ... -
Investigating Middle Palaeolithic subsistence: zooarchaeological perspectives on the potential character of hominin climate refugia in Greece
; (Journal of Quaternary Science, 2021-09-21)
It has long been proposed that during Pleistocene climatic perturbations the Balkan peninsula sustained refugial areas for fauna, flora, and potentially, hominins. In this study, we explore Middle Palaeolithic subsistence ... -
‘Ten Years After’—a long‐term settlement and bioerosion experiment in an Arctic rhodolith bed (Mosselbukta, Svalbard)
; ; ; ; (Geobiology, 2021-09-15)
Rhodolith beds and bioherms formed by ecosystem engineering crustose coralline algae support the northernmost centres of carbonate production, referred to as polar cold‐water carbonate factories. Yet, little is known about ... -
An early Eocene fossil from the British London Clay elucidates the evolutionary history of the enigmatic Archaeotrogonidae (Aves, Strisores)
(Papers in Palaeontology, 2021-07-18)
Archaeotrogons have long been known from late Eocene and Oligocene localities in France, where limb bones are abundantly represented. The phylogenetic affinities of these birds, however, have remained elusive. Although ... -
New and revised small shelly fossil record from the lower Cambrian of northern Iran
; ; ; ; (Papers in Palaeontology, 2021-08-19)
Small shelly fossils (SSFs) are highly informative of the ‘Cambrian explosion’. Their palaeobiodiversity has been documented from lower Cambrian deposits worldwide but it remains elusive in areas such as Iran, despite this ... -
Trees Talk Tremor—Wood Anatomy and δ13C Content Reveal Contrasting Tree‐Growth Responses to Earthquakes
; ; ; ; ; (Journal of Geophysical Research: Biogeosciences, 2021-10-08)
Large earthquakes can increase the amount of water feeding stream flows, raise groundwater levels, and thus grant plant roots more access to water in water‐limited environments. We examine growth and photosynthetic responses ... -
Dinosaurian survivorship schedules revisited: new insights from an age‐structured population model
(Palaeontology, 2021-10-13)
Little is known of dinosaur population biology due to insufficient information on age‐dependent fecundities and mortalities. So far, survivorship curves (SC) of only six dinosaurs (four tyrannosaurs, one ceratopsian, one ... -
Scheinbare Großkolonien von Graptolithen
(Beiträge zur Geologie von Thüringen, 1944)Der Beitrag liefert eine Betrachtung von 3 verschiedenen Graptolithenfunden. -
Versteinerungen des Oberen Muschelkalks bei Ohrdruf als aufschlußreiche Dokumente für die Geschichte des deutschen Muschelkalkmeeres
(Beiträge zur Geologie von Thüringen, 1940)Der Beitrag umfasst ein Referat über einige Versteinerungen des Oberen Muschelkalks bei Ohrdruf und soll ein Hinweis darauf sein, daß bestimmte Fossilien und gewisse Gesteinsformen in mo besonders aufschlußreiche Dokumente ... -
Revisiting Global Vegetation Controls Using Multi‐Layer Soil Moisture
; ; ; ; ; (Geophysical Research Letters, 2021-06-07)
The productivity of terrestrial vegetation is determined by multiple land surface and atmospheric drivers. Water availability is critical for vegetation productivity, but the role of vertical variability of soil moisture ... -
Bacterial and archaeal lipids trace chemo(auto)trophy along the redoxcline in Vancouver Island fjords
; ; ; ; (Geobiology, 2021-05-07)
Abstract Marine oxygen minimum zones play a crucial role in the global oceanic carbon, nitrogen, and sulfur cycles as they harbor microbial communities that are adapted to the water column chemistry and redox zonation, and ...
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