Por favor, use este identificador para citar o enlazar a este item:
http://hdl.handle.net/10261/156352
COMPARTIR / EXPORTAR:
SHARE CORE BASE | |
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL | DATACITE | |
Título: | Aquatic community response to volcanic eruptions on the Ecuadorian Andean flank: evidence from the palaeoecological record |
Autor: | Matthews-Bird, Frazer; Brooks, Stephen John; Gosling, William D.; Gulliver, P.; Mothes, P.; Montoya, Encarnación CSIC ORCID | Palabras clave: | Chironomids Lake sediment burial Long-term changes Non-pollen palynomorphs Sensitivity Tephras |
Fecha de publicación: | oct-2017 | Editor: | Springer Nature | Citación: | Journal of Paleolimnology,58(4): 437–453 (2017) | Resumen: | Aquatic ecosystems in the tropical Andes are under increasing pressure from human modification of the landscape (deforestation and dams) and climatic change (increase of extreme events and 1.5 °C on average temperatures are projected for AD 2100). However, the resilience of these ecosystems to perturbations is poorly understood. Here we use a multi-proxy palaeoecological approach to assess the response of aquatic ecosystems to a major mechanism for natural disturbance, volcanic ash deposition. Specifically, we present data from two Neotropical lakes located on the eastern Andean flank of Ecuador. Laguna Pindo (1°27.132′S–78°04.847′W) is a tectonically formed closed basin surrounded by a dense mid-elevation forest, whereas Laguna Baños (0°19.328′S–78°09.175′W) is a glacially formed lake with an inflow and outflow in high Andean Páramo grasslands. In each lake we examined the dynamics of chironomids and other aquatic and semi-aquatic organisms to explore the effect of thick (> 5 cm) volcanic deposits on the aquatic communities in these two systems with different catchment features. In both lakes past volcanic ash deposition was evident from four large tephras dated to c.850 cal year BP (Pindo), and 4600, 3600 and 1500 cal year BP (Baños). Examination of the chironomid and aquatic assemblages before and after the ash depositions revealed no shift in composition at Pindo, but a major change at Baños occurred after the last event around 1500 cal year BP. Chironomids at Baños changed from an assemblage dominated by Pseudochironomus and Polypedilum nubifer-type to Cricotopus/Paratrichocladius type-II, and such a dominance lasted for approximately 380 years. We suggest that, despite potential changes in the water chemistry, the major effect on the chironomid community resulted from the thickness of the tephra being deposited, which acted to shallow the water body beyond a depth threshold. Changes in the aquatic flora and fauna at the base of the trophic chain can promote cascade effects that may deteriorate the ecosystem, especially when already influenced by human activities, such as deforestation and dams, which is frequent in the high Andes. | Versión del editor: | http://dx.doi.org/10.1007/s10933-017-0001-0 | URI: | http://hdl.handle.net/10261/156352 | DOI: | 10.1007/s10933-017-0001-0 | ISSN: | 0921-2728 | E-ISSN: | 1573-0417 |
Aparece en las colecciones: | (Geo3Bcn) Artículos |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
---|---|---|---|---|
Montoya_Journal_of_paleolimnology_1.pdf | 1,62 MB | Adobe PDF | Visualizar/Abrir |
CORE Recommender
PubMed Central
Citations
1
checked on 08-mar-2024
SCOPUSTM
Citations
13
checked on 12-mar-2024
WEB OF SCIENCETM
Citations
12
checked on 28-feb-2024
Page view(s)
308
checked on 19-mar-2024
Download(s)
252
checked on 19-mar-2024
Google ScholarTM
Check
Altmetric
Altmetric
Artículos relacionados:
NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.