Consulta: creatorFacets:"Hooghiemstra, H."
Registros recuperados: 4
Data/hora: 14/06/2024 03:19:11

Ultra-high resolution pollen record from the northern Andes reveals rapid shifts in montane climates within the last two glacial cycles
Provedor de dados: 5
Autores: Groot, M. H. M.; Bogota, R. G.; Lourens, L. J.; Hooghiemstra, H.; Vriend, M.; Berrio, J. C.; Tuenter, E.; Van Der Plicht, J.; Van Geel, B.; Ziegler, M.; Weber, S. L.; Betancourt, A.; Contreras, L.; Gaviria, S.; Giraldo, C.; Gonzalez, N.; Jansen, J. H. F.; Konert, M.; Ortega, D.; Rangel, O.; Sarmiento, G.; Vandenberghe, J.; Van Der Hammen, T.; Van Der Linden, M.; Westerhoff, W.
Here we developed a composite pollen-based record of altitudinal vegetation changes from Lake Fuquene (5 degrees N) in Colombia at 2540m elevation. We quantitatively calibrated Arboreal Pollen percentages (AP%) into mean annual temperature (MAT) changes with an unprecedented similar to 60-year resolution over the past 284 000 years. An age model for the AP% record was constructed using frequency analysis in the depth domain and tuning of the distinct obliquity-related variations to the latest marine oxygen isotope stacked record. The reconstructed MAT record largely concurs with the similar to 100 and 41-kyr (obliquity) paced glacial cycles and is superimposed by extreme changes of up to 7 to 10 degrees Celsius within a few hundred years at the major...
Tipo: Text
Ano: 2011
URL: https://archimer.ifremer.fr/doc/00228/33889/32230.pdf

Geochronological database and classification system for age uncertainties in Neotropical pollen records
Provedor de dados: 5
Autores: Flantua, S. G. A.; Blaauw, M.; Hooghiemstra, H.
The newly updated inventory of palaeoecological research in Latin America offers an important overview of sites available for multi-proxy and multi-site purposes. From the collected literature supporting this inventory, we collected all available age model metadata to create a chronological database of 5116 control points (e.g. C-14, tephra, fission track, OSL, Pb-210) from 1097 pollen records. Based on this literature review, we present a summary of chronological dating and reporting in the Neotropics. Difficulties and recommendations for chronology reporting are discussed. Furthermore, for 234 pollen records in northwest South America, a classification system for age uncertainties is implemented based on chronologies generated with updated calibration...
Tipo: Text
Ano: 2016
URL: https://archimer.ifremer.fr/doc/00497/60835/64487.pdf

Mortierella turficola Ling Yong
Provedor de dados: 16
Autores: Gams, W.; Hooghiemstra, H.
Several species of Mortierella described until 1930 are today unknown since living cultures are unavailable. The diagnoses of most of these species have been reproduced by Linnemann (in Zycha &amp; Siepmann, 1970). but it is difficult to assess the justification of their retention. Recently Kuhlman &amp; Hodges (1972) rediscovered M. rostafinskii Bref. and M. strangulata Tiegh., two similar but distinct species. This contribution concerns the rediscovery of another so far problematic species. During the study of the fungal flora of the Heseper Moor near Meppen, Niedersachsen, F. R. G., Mortierella turficola Ling Yong (1930) was found to be the predominating Mortierella species. A stand of Sphagnum recurvum P. Beauv. with some Eriophorum vaginatum L. (pH c....
Tipo: Article / Letter to the editor
Ano: 1976
URL: http://www.repository.naturalis.nl/record/531773

Amazonia through time: Andean uplift, climate change, landscape evolution and biodiversity
Provedor de dados: 16
Autores: Hoorn, C.; Wesselingh, F.P.; Steege, H. ter; Bermudez, M.A.; Mora, A.; Sevink, J.; Sanmartín, I.; Sanchez-Meseguer, A.; Anderson, C.L.; Figueiredo, J.P.; Jaramillo, C.; Riff, D.; Negri, F.R.; Hooghiemstra, H.; Lundberg, J.; Stadler, T.; Särkinen, T.; Antonelli, A.
The Amazonian rainforest is arguably the most species-rich terrestrial ecosystem in the world, yet the timing of the origin and  volutionary causes of this diversity are a matter of debate. We review the geologic and phylogenetic evidence from Amazonia and compare it with uplift records from the Andes. This uplift and its effect on regional climate fundamentally changed the Amazonian landscape by reconfiguring drainage patterns and creating a vast influx of sediments into the basin. On this “Andean” substrate, a region-wide edaphic mosaic developed that became extremely rich in species, particularly in Western Amazonia. We show that Andean uplift was crucial for the evolution of Amazonian landscapes and ecosystems, and that current biodiversity patterns...
Tipo: Article / Letter to the editor
Palavras-chave: Amazonia; Evolution; Biodiversity; 42.05; 42.21; 38.23.
Ano: 2010
URL: http://www.repository.naturalis.nl/record/365034