Years of lacustrine ecosystem changes from Lake Petit (Southern Alps, 2200 m a.s.l.)
Regime shift and resilience of algal communities
Datos Bibliográficos
Sediments from Lake Petit (2200 m a.s.l., Southern Alps) are particularly relevant for analysis of coupled landscape palaeoecology and palaeolimnology. Diatom assemblages, organic matter composition of sediments (total nitrogen and organic carbon) and Pediastrum boryanum concentrations were obtained from a 144-cm-long core, enabling the reconstruction of the aquatic ecosystem over nearly the last 5000 cal. BP. From 4800 to 4300 cal. BP, Lake Petit was a stable diatom-productive water body dominated by alkaliphilous diatoms ( Staurosirella pinnata). During this period, nutrients and cations were supplied by the chemical weathering of podzols that developed under conifer woodlands. This overall stability was suddenly interrupted at 4200 cal. BP by a major detrital pulse that was probably climate linked (4200 cal. BP event) and that triggered a drop in diatom productivity and diversity. From 4100 to 2400 cal. BP, diatom productivity progressively decreased, whereas Pediastrum developed. Diatom assemblages were more diversified (predominance of Pseudostaurosira robusta, P. brevistriata and P. pseudoconstruens) and reflected a regime of continuous erosion, whereas slopes were colonised by grazed grasslands. Finally, from 2400 cal. BP to the present day, diatom assemblages reveal a slight acidification and nutrient enrichment of waters concomitant with increasing human pressure in the catchment. These results demonstrate the close links between ecosystems and the ready propagation of disturbances throughout watersheds that might lead to abrupt regime shifts in such alpine environments
Biology · Diatom · Ecosystem · Nutrient · Environmental Science · Geological formations and processes · Geology and Paleoclimatology Research · Paleontology and Stratigraphy of Fossils · Ecology · Geology · Oceanography
Alpine lake sediment records of the impact of glaciation and climate change on the biogeochemical cycling of soil nutrients
Holocene palaeohydrological changes in the northern Mediterranean borderlands as reflected by the lake-level record of lake ledro, northeastern Italy
Climate change at the 4.2 ka BP termination of the Indus valley civilization and Holocene south Asian monsoon variability
A coded checklist and ecological indicator values of freshwater diatoms from The Netherlands
Determination of the number of zones in a biostratigraphical sequence
Late Holocene drought responsible for the collapse of Old World civilizations is recorded in an Italian cave flowstone
Formal subdivision of the Holocene Series/Epoch
Climatic Change in Mountain Regions
Diversity in Tropical Rain Forests and Coral Reefs
Catastrophic shifts in ecosystems
Coniss
Holocene tree-line variability in the Kauner Valley, Central Eastern Alps, indicated by dendrochronological analysis of living trees and subfossil logs
Holocene history of Lac des Lauzons (2180 m a.s.l.), reconstructed from multiproxy analyses of Coleoptera, plant macroremains and pollen (Hautes-Alpes, France)
Les gravures rupestres du Chalcolithique et de l’âge du Bronze ancien de la région du mont Bego. Les mythes cosmogoniques des premiers peuples métallurgistes des Alpes méridionales
A historical ecology of the Ecrins (Southern French Alps)
A severe centennial-scale drought in midcontinental North America 4200 years ago and apparent global linkages
Climatic, vegetation and cultural change in the eastern Mediterranean during the mid-Holocene environmental transition
The use of Rarefaction Analysis for Estimating Palynological Richness from Quaternary Pollen-Analytical Data
Glacier and lake-level variations in west-central Europe over the last 3500 years
Possible complexity of the climatic event around 4300—3800 cal. BP in the central and western Mediterranean
Non-reversible geosystem destabilisation at 4200 cal. BP
Nutrient cycling in the palaeorecord
Multi-proxy studies in palaeolimnology
How mankind has shaped European nature
The Anthropocene
Un lac à protéger
Dynamique du peuplement et activités agro-pastorales durant l'âge du Bronze dans les massifs du Haut Champsaur et de l'Argentierois (Hautes-Alpes)
| Obras citantes distintas | 2 |
|---|---|
| Citas por año | 0,29 |
| Intervalo de citas | 2019 - 2019 (1) |
| Velocidad de citación | historical |
| Altamente citado | No |
| Tipos de cita | Neutras: 2 |