Resilience of an aquatic macrophyte to an anthropogenically induced environmental stressor in a Ramsar wetland of southern Chile

Vista sencilla de ítem
dc.contributor.authorJaramillo, Eduardo
dc.contributor.authorDuarte, Cristian
dc.contributor.authorLabra, Fabio A.
dc.contributor.authorLagos, Nelson A.
dc.contributor.authorPeruzzo, Bruno
dc.contributor.authorSilva, Ricardo
dc.contributor.authorVelasquez, Carlos
dc.contributor.authorManzano, Mario
dc.contributor.authorMelnick, Daniel
dc.date.accessioned2023-08-08T21:23:43Z
dc.date.available2023-08-08T21:23:43Z
dc.date.issued2019-03-15
dc.descriptionIndexación Scopuses
dc.description.abstractIn mid-2004, anthropogenically induced changes in water quality of the Río Cruces wetland, a Ramsar site located in southern Chile (ca. 40°S), enhanced the resuspension of iron-enriched sediments, which were subsequently deposited over the most abundant aquatic macrophyte of the wetland (Egeria densa Planch. 1849). This event triggered the formation of brownish, necrotic patches and increased iron contents in the leaves and stems of E. densa, which contributed to a significant demise of the plant within the wetland. In this study, we estimate the recovery time as a proxy for resilience of this macrophyte at organismal and population levels. Macro- and micro-optical characteristics, as well as iron contents in tissues of E. densa, were documented in four time windows (2004, 2008, 2012, and 2014). In addition, the size of the macrophyte population and its spatial occurrence were monitored from 2008 to 2016 across 36 study sites within the wetland. Our results suggest necrotic patches and high iron contents in E. densa persisted at least until 2008. After 2013, a significant increase in the spatial occurrence of E. densa was observed within the wetland, reaching full recovery of the population during 2015. The health of plant tissues and iron contents in leaves and stems showed recovery period close to 4 years, while the recovery of the spatial occurrence of E. densa took approximately 9 years. While the monitoring of plant health was not performed on a strict annual basis, the recovery rates estimated here are slower than those described for other macrophytes. This finding might reflect the long-lasting effects of the disturbance from 2004 and the interaction with biotic processes, such as foraging by waterbirds recolonizing the Río Cruces wetland. These results show that full recovery of E. densa was achieved through a cascade of effects starting with abiotic factors (water quality) and passing through physiological and individual levels, to finally reach the population level. A key aspect of this response is the invasive nature of the macrophyte, which likely contributed to its recovery as a consequence of improved water quality. Less successful macrophyte species in other systems may not reach the specific population recovery, and become subdominant species instead, or even be eradicated from the wetland either as the result of herbivory or due to competition with other macrophytes.es
dc.identifier.citationAmbio Volume 48, Issue 3, Pages 304 - 312 15 March 2019es
dc.identifier.doi10.1007/s13280-018-1071-6en
dc.identifier.issn0044-7447
dc.identifier.urihttps://repositorio.unab.cl/xmlui/handle/ria/52348
dc.language.isoenes
dc.publisherAmbioes
dc.subjectEnvironmental changeses
dc.subjectIron loads in plantses
dc.subjectSpatial occurrence of aquatic macrophyteses
dc.subjectWetlandes
dc.titleResilience of an aquatic macrophyte to an anthropogenically induced environmental stressor in a Ramsar wetland of southern Chilees
dc.typeArtículoes
Archivos
Bloque original
Mostrando 1 - 1 de 1
Miniatura
Nombre:
s13280-018-1071-6.pdf
Tamaño:
1.03 MB
Formato:
Adobe Portable Document Format
Descripción:
TEXTO COMPLETO EN INGLÉS
Descargar
Bloque de licencias
Mostrando 1 - 1 de 1
No hay miniatura disponible
Nombre:
license.txt
Tamaño:
1.71 KB
Formato:
Item-specific license agreed upon to submission
Descripción:
Descargar
Colecciones
Fac.CV - Artículos de Revista