6533b822fe1ef96bd127d546
RESEARCH PRODUCT
Meromixis origin and recent trophic evolution in the Spanish mountain lake La Cruz
Ramon JuliàFrancesc BurjachsMj DasiMiracleGuy SeretF MezquitaEduardo VicenteRocasubject
education.field_of_studyEcologybiologyEcologyPopulationSedimentWoodlandAuthigenicAquatic Sciencebiology.organism_classificationWater levelDiatomOstracodeducationEcology Evolution Behavior and SystematicsGeologyWater Science and TechnologyTrophic leveldescription
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").
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1998-01-01 | Aquatic Sciences |