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  • 1
    Electronic Resource
    Electronic Resource
    Meromixis origin and recent trophic evolution in the Spanish mountain lake La Cruz (1998)
    Springer
    Aquatic sciences 60 (1998), S. 279-299 
    Details
    ISSN: 1420-9055
    Keywords: Key words: Lake La Cruz, trophic changes, meromixis, diatoms, cladocera, ostracoda and pollen stratigraphy.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract: A sediment core from a Mediterranean karstic lake was studied through its pollen, diatom, chydorid, ostracod, charcoal and authigenic mineral composition. Information about environmental history recorded in the sediment sequence since the Middle Ages is presented. The main fluctuations of water volume and trophic status of the lake occurred during periods of great change in land management and during climatic cold phases. The synergetic effect of these two factors led to a high water level phase and triggered a rising of the trophic level which produced meromixis. The onset of meromictic conditions at about 1700 AD coincides with the Maunder minimum in the Little Ice Age as well as with a period of increasing human population, woodland clearance and agricultural expansion to the detriment of the nomadic livestock breeding or transhumance ("Mesta").
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s000270050042
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    Paper (German National Licenses)
    Fulltext
  • 2
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    CLAM age model and pollen profile of sediment core Abric_Romani (2017)
    PANGAEA
    Details
    Publication Date: 2024-04-20
    Keywords: Abric_Romani; Abrupt Climate Changes and Environmental Responses; Accumulation model; Acer; ACER; Alnus; Amaranthaceae/Chenopodiaceae; Apiaceae; Armeria; Artemisia; Asteraceae; Betula; Brassicaceae; Buxus; Calendar age; Calendar age, maximum/old; Calendar age, minimum/young; Campanulaceae; Carpinus; Caryophyllaceae; Cedrus; Centaurea; cf. Juniperus; Cistus; Classical age-modeling approach, CLAM (Blaauw, 2010); Coriaria; Corylus; Counting, palynology; Cyperaceae; DEPTH, sediment/rock; Dipsacaceae; Ephedra fragilis-type; Erica; Euphorbia; Fabaceae; Fagus; Fraxinus; Galium-type; Hedera; Helianthemum; Juglans; Lamiaceae; Lygeum; Olea/Phillyrea; Pinus; Pinus halepensis/P. pinaster-type; Pinus sylvestris-type; Pistacia; Plantago; Poaceae; Polygonum amphibium; Polypodiales; Polypodium; Potamogeton; Quercus; Ranunculaceae; Rhamnus; Rosaceae; Rumex; Salix; Sample ID; Sanguisorba minor; Scabiosa; Scrophulariaceae; Sparganium/Typha; Syringa; Thalictrum; Tilia; Type of age model; Typha; Ulmus; Urticaceae; Viburnum; Vitis
    Type: Dataset
    Format: text/tab-separated-values, 6957 data points
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    DATA PANGAEA
  • 3
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    Unknown
    The ACER pollen and charcoal database (2017)
    PANGAEA
    In:  Supplement to: Sanchez Goñi, Maria Fernanda; Desprat, Stéphanie; Daniau, Anne-Laure; Bassinot, Franck C; Polanco-Martínez, Josué M; Harrison, Sandy P; Allen, Judy R M; Anderson, R Scott; Behling, Hermann; Bonnefille, Raymonde; Burjachs, Francesc; Carrión, José S; Cheddadi, Rachid; Clark, James S; Combourieu-Nebout, Nathalie; Courtney-Mustaphi, Colin J; DeBusk, Georg H; Dupont, Lydie M; Finch, Jemma M; Fletcher, William J; Giardini, Marco; González, Catalina; Gosling, William D; Grigg, Laurie D; Grimm, Eric C; Hayashi, Ryoma; Helmens, Karin F; Heusser, Linda E; Hill, Trevor R; Hope, Geoffrey; Huntley, Brian; Igarashi, Yaeko; Irino, Tomohisa; Jacobs, Bonnie Fine; Jiménez-Moreno, Gonzalo; Kawai, Sayuri; Kershaw, A Peter; Kumon, Fujio; Lawson, Ian T; Ledru, Marie-Pierre; Lézine, Anne-Marie; Liew, Ping-Mei; Magri, Donatella; Marchant, Robert; Margari, Vasiliki; Mayle, Francis E; McKenzie, G Merna; Moss, Patrick T; Müller, Stefanie; Müller, Ulrich C; Naughton, Filipa; Newnham, Rewi M; Oba, Tadamichi; Pérez-Obiol, Ramon P; Pini, Roberta; Ravazzi, Cesare; Roucoux, Katherine H; Rucina, Stephen M; Scott, Louis; Takahara, Hikaru; Tzedakis, Polychronis C; Urrego, Dunia H; van Geel, Bas; Valencia, Bryan G; Vandergoes, Marcus J; Vincens, Annie; Whitlock, Cathy L; Willard, Debra A; Yamamoto, Masanobu (2017): The ACER pollen and charcoal database: a global resource to document vegetation and fire response to abrupt climate changes during the last glacial period. Earth System Science Data, 9(2), 679-695, https://doi.org/10.5194/essd-9-679-2017
    Details
    Publication Date: 2024-04-25
    Description: Quaternary records provide an opportunity to examine the nature of the vegetation and fire responses to rapid past climate changes comparable in velocity and magnitude to those expected in the 21st century. The best documented examples of rapid climate change in the past are the warming events associated with the Dansgaard-Oeschger (D-O) cycles during the last glacial period, which were sufficiently large to have had a potential feedback through changes in albedo and greenhouse gas emissions on climate. Previous reconstructions of vegetation and fire changes during the D-O cycles used independently constructed age models, making it difficult to compare the changes between different sites and regions. Here we present the ACER (Abrupt Climate Changes and Environmental Responses) global database which includes 93 pollen records from the last glacial period (73-15 ka) with a temporal resolution better than 1,000 years, 32 of which also provide charcoal records. A harmonized and consistent chronology based on radiometric dating (14C, 234U/230Th, OSL, 40Ar/39Ar dated tephra layers) has been constructed for 86 of these records, although in some cases additional information was derived using common control points based on event stratigraphy. The ACER database compiles metadata including geospatial and dating information, pollen and charcoal counts and pollen percentages of the characteristic biomes, and is archived in Microsoft ACCESS(TM).
    Keywords: Abrupt Climate Changes and Environmental Responses; ACER
    Type: Dataset
    Format: application/zip, 6 datasets
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    DATA PANGAEA
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