A 6000-year record of ecological and hydrological changes from Laguna de la Leche, north coastal Cuba
| Autor: | Anthony M. Davis, Matthew Peros, Eduard G. Reinhardt |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
010506 paleontology
010504 meteorology & atmospheric sciences biology Environmental change Ecology Macrofossil medicine.disease_cause biology.organism_classification 01 natural sciences Water level Oceanography Arts and Humanities (miscellaneous) Hydrobiidae Pollen medicine General Earth and Planetary Sciences Mangrove Holocene Sea level Geology 0105 earth and related environmental sciences Earth-Surface Processes |
| Zdroj: | Quaternary Research. 67:69-82 |
| ISSN: | 1096-0287 0033-5894 |
| Popis: | Laguna de la Leche, north coastal Cuba, is a shallow (≤ 3 m), oligohaline (∼ 2.0–4.5‰) coastal lake surrounded by mangroves and cattail stands. A 227-cm core was studied using loss-on-ignition, pollen, calcareous microfossils, and plant macrofossils. From ∼6200 to ∼ 4800 cal yr BP, the area was an oligohaline lake. The period from ∼ 4800 to ∼ 4200 cal yr BP saw higher water levels and a freshened system; these changes are indicated by an increase in the regional pollen rain, as well as by the presence of charophyte oogonia and an increase in freshwater gastropods (Hydrobiidae). By ∼ 4000 cal yr BP, an open mesohaline lagoon had formed; an increase in salt-tolerant foraminifers suggests that water level increase was driven by relative sea level rise. The initiation of Laguna de la Leche correlates with a shift to wetter conditions as indicated in pollen records from the southeastern United States (e.g., Lake Tulane). This synchronicity suggests that sea level rise caused middle Holocene environmental change region-wide. Two other cores sampled from mangrove swamps in the vicinity of Laguna de la Leche indicate that a major expansion of mangroves was underway by ∼ 1700 cal yr BP. |
| Databáze: | OpenAIRE |
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