Holocene temperature in the Iberian Peninsula reconstructed with insect subfossils

phys.org | 11/8/2018 | Staff
eymira (Posted by) Level 3
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Remains of chironomid subfossils, a type of insect similar to mosquitoes, were used in a study to reconstruct the temperature of the Iberian Peninsula in the Holocene, the geological period from 11,000 years ago until now. The results of the study prove some of the climate patterns of the Holocene suggested by other methodologies: a rise of temperatures in the beginning and the end of the period, higher temperatures during the Holocene Climate Optimum, and a decline of temperatures after the beginning of the Late Holocene. The study, published in the journal The Holocene, is the first reconstruction of the temperature of the peninsula during this period using this indicator. According to the researchers, this is a promising tool to understand the evolution of climate over history and the main natural and anthropic climate changes that shaped ecosystems before instrumental records.

Participants in the study are the researcher Pol Tarrats, member of the research group Freshwater Ecology, Hydrology and Management (FEHM) of the UB and first author of the article, and the researchers Miguel Cañedo-Argüelles, Narcís Prat and Maria Rieradevall, from the same group; Blas Valero-Garcés and Penélope González-Sampériz, from the Pyrenean Institute of Ecology (IPE-CSIC), and Oliver Heiri, from the University of Bern (Switzerland).

Chironomidae - Nematocera - Family - Order - Mosquitoes

Chironomidae are from the nematocera family (diptera order), similar to mosquitoes. These insects are abundant worldwide and change gender and amount depending on the temperature in which they live, so they are a good indicator of this climate variable. The research study was conducted in Basa de la Mora lake (Huesca), where researchers took the necessary sediments to carry the study out.

"Regarding the records of Chironomidae, the aim of any paleoenvironmental reconstruction study is to get the larval cephalic capsules, since this is the larval phase of the insects that is developed in the sediments and that...
(Excerpt) Read more at: phys.org
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