Results 81 to 90 of about 187,360 (156)

Pollen Mineralization Fuels Biogeochemical Cycling and Microbial Community Succession in Lake Superior

Journal of Geophysical Research: Biogeosciences, Volume 131, Issue 8, August 2026.
Abstract Pollen is a terrigenous particulate regarded as recalcitrant organic matter (OM) in aquatic ecosystems, seasonally introducing undetermined quantities of terrigenous OM to inland lakes. The role of pollen as a carbon and nutrient delivery mechanism for large aquatic ecosystems remains an understudied component of biogeochemical cycling.
Jake D. Zunker, Kathryn M. Schreiner, Andrew W. Wood, Britta L. Larson, Chan Lan Chun, Keagan Bailey, Elizabeth C. Minor, Eva Hendrickson, Christopher T. Filstrup   +8 more
wiley   +1 more source

Archaeological Baltic amber: degradation mechanisms and conservation measures [PDF]

, 2009
The aim of this project was to achieve a deep understanding of the mechanisms by which Baltic amber degrades, in order to develop techniques for preventive conservation of archaeological amber objects belonging to the National Museum of Denmark’s ...
Pastorelli, Gianluca <1975>
core   +1 more source

Introducing the Coincidence Index: A Novel Diagnostic and Production‐Based Framework for Water Body Interaction Analysis and Its Application to Study the Interaction of River Plumes

Journal of Advances in Modeling Earth Systems, Volume 18, Issue 8, August 2026.
Abstract Quantifying interactions between distinct water bodies is critical yet challenging for understanding ocean and estuarine dynamics. We introduce the coincidence index (CI), defined as the product of two arbitrary tracers (a $a$, b $b$), to diagnose where two water masses coexist and mix.
Xiangyu Li, Knut Klingbeil, Hans Burchard   +2 more
wiley   +1 more source

Orchid genome evolution and trait innovation

Journal of Integrative Plant Biology, Volume 68, Issue 8, Page 2577-2607, August 2026.
Orchids became one of the world's most diverse plant groups through genome‐driven innovations, unique relationships with fungi and pollinators, and remarkable adaptability. This review explains the origins of orchids and the evolution of their distinctive life forms, flowers, and ecological strategies and highlights promising directions for future ...
Meng‐Yao Zeng, Cheng‐Yuan Zhou, Linying Wang, Jie Gao, Weilun Yin, Dong‐Hui Peng, Siren Lan, Feng‐Xi Yang, Zhong‐Jian Liu   +8 more
wiley   +1 more source

Multidisciplinary Exploration of Computed‐Tomographic and Ancient‐DNA Data of an Iron Age Skull From Latvia With Multiple Lytic Bone Lesions: Differential Diagnosis Between Metastatic Carcinoma, Multiple Myeloma and Skeletal Tuberculosis

Ecology and Evolution, Volume 16, Issue 7, July 2026.
In this study we used a combined computed tomographic and archaeogenetic approach to analyse a skull and vertebra with lytic lesions from a disturbed grave in the Čunkāni‐Dreņģeri cemetery in Latvia, dated to 10th century CE. Both methodologies were used to evaluate a proposed differential diagnosis of multiple myeloma, metastatic carcinoma and bone ...
Alise Akermane‐Pokšāne, Jānis Ķimsis, Elīna Pētersone‐Gordina, Antonija Vilcāne, Guntis Gerhards, Mārtiņš Pēterfelds, Renāte Ranka   +6 more
wiley   +1 more source

The Evidence for Linearly Scaling Ocean Gas Exchange With Sea Ice Needs Strengthening

Journal of Geophysical Research: Biogeosciences, Volume 131, Issue 7, July 2026.
Abstract Polar oceans are critical components of the oceanic uptake of atmospheric carbon dioxide. Estimates of this uptake across the air‐sea interface require parameterizations of gas transfer velocity that account for variable sea ice concentrations.
Jennifer Watts, Thomas G. Bell, Karen Anderson, John Prytherch, Brian J. Butterworth, Brent Else, Scott Miller, Thomas Holding, Jamie D. Shutler   +8 more
wiley   +1 more source

Northern exposure: Baltic amber and silver beads from the Iron Age reuse of the Bela Vista tholos (Sintra, Portugal)

Trabajos de Prehistoria
This study re-examines the personal adornment assemblage from the Bela Vista tholos (Sintra, Portugal), highlighting the rediscovery of a long-lost amber bead and clarifying the chronology and provenance of associated artifacts.
José Ángel Garrido-Cordero, Rita Loureiro, José María Martínez-Blanes, Ana C. Sousa, María Dolores Zambrana-Vega, Luz Marina Salas Acosta, Daniel Sánchez-Gómez, Carlos Odriozola Lloret   +7 more
doaj   +1 more source

Towards a new picture of the 'Baltic amber forest' - flora, habitat types, and palaeoecology [PDF]

, 2017
Amber is fossilized resin that was excreted by conifers or angiosperms. Plant and animal remains which got caught inside of these ancient resin flows are called ‘inclusions’ and are often preserved with high fidelity.
Sadowski, Eva-Maria
core   +1 more source

Gintaras kaip simbolis: kultūrų kaita ir tęstinumas Vokiečių ordino valdose Baltijos pajūryje | Amber as a Symbol: Cultural Change and Continuity in the Teutonic Order-Ruled Areas of the Baltic Coast

Acta Historica Universitatis Klaipedensis, 2016
The article explores the changes in the gathering, processing and use of amber on the eastern shores of the Baltic Sea at the end of the Viking Age and in the 12th to 16th century. In the pagan sacral space, works in amber reflected mythological elements,
Sigita Bagužaitė-Talačkienė
doaj   +1 more source

Fossilized Fly in Baltic Amber

, 2020
In a gem-like body of fossilized tree resin, a fly and a spider are suspended. The two inclusions are fixed on opposing ends of the tiny organic jewel. The fly, as if in mid-flight, is frozen just below the center of the piece. The spider, so small it is

core