Impacts of climate change on the aquatic flora of Lagunas Verdes, Chiles Volcano, Ecuador

Abstract (en):

We evaluated the impact of climate change on the structure and floral composition of the aquatic plants occurring in five Andean lakes (3900 m a. s. l.) at the foot of the Chiles Volcano.  We obtained field information using transects and depth quadrants to evaluate richness and cover vegetation patterns, whereas physical chemistry of water was evaluated using electronic measuring equipment in situ. Part of the information from the same lakes 17 years ago was used as a basis for comparison. Were recorded fifteen species of aquatic plants, with evidence of a reduction in the populations of Isoetes sp., Crassula venezuelensis and Elatine ecuadoriensis.  Apparently, Lilaeopsis schaffneriana and Juncus stipulatus were replaced by Lachemilla nivalis and a Poaceae of the genus Agrostis as a colonizer.  The abiotic characteristics of the lakes show changing trends in pH and conductivity of the waters, turning them more neutral than acidic. This leads to conditions that may allow for the establishment of species other than those  of historical records, increasing the general variety, implying the possibility that climate change effects are not necessarily negative in this situation.  However, there is evidence of damage to the natural aquatic ecosystem, through the loss or replacement of hydrophilic for halophile plants. This potential transformation process of the natural environment jeopardizes the ecological functioning of the aquatic ecosystems in the area.

Abstract (es):

Evaluamos los impactos del cambio climático sobre la estructura y composición florística de las plantas acuáticas en cinco lagunas altoandinas (3900 m s. n. m.), al pie del volcán Chiles. Utilizamos transectos y cuadrantes de profundidad para evaluar riqueza y patrones de cobertura vegetal, y evaluamos la físicoquímica de agua con equipos electrónicos de medición in situ.  Esta información fue comparada con la generada hace 17 años. Registramos 15 especies de plantas acuáticas, de las cuales se evidenció reducción en las poblaciones de Isoetes sp., Crassula venezuelensis y Elatine ecuadoriensis. Al parecer, Lilaeopsis schaffneriana y Juncus stipulatus son remplazadas por Lachemilla nivalis, y una Poaceae del género Agrostis como colonizadora. Las características abióticas de las lagunas evidencian cambios en el pH y la conductividad de sus aguas, generando condiciones particulares para un posible establecimiento de especies distintas a los registros históricos. Evidenciamos perjuicios sobre la naturaleza del ecosistema acuático, por la pérdida o reemplazo de especies hidrófitas por helófitas, como indicadoras de un potencial proceso de transformación de ambientes naturales, y un inminente riesgo de la permanencia y la funcionalidad ecológica de los ecosistemas acuáticos del lugar. 

Keywords:

Ecosistema Acuático, Helófitas, Hidrófitas, Plantas acuáticas, Poblaciones, Vulnerabilidad (es)

Aquatic Ecosystems, Aquatic Plants, Helophytes, Hydrophites, Populations, Vulnerability (en)

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 Impactos del cambio climático sobre la flora acuática de las Lagunas Verdes, volcán Chiles, Ecuador

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How to Cite

Jácome, E. T., Vallejo, B., & Gómez de la Torre, M. (2019). Impacts of climate change on the aquatic flora of Lagunas Verdes, Chiles Volcano, Ecuador. Biota Colombiana, 20(2), 20–31. https://doi.org/10.21068/c2019.v20n02a02

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