0000000000374673
AUTHOR
José L. Alonso-guillén
The role of charophytes in a Mediterranean pond created forrestoration purposes
A small, shallow basin was created and flooded with groundwater in a Reserve Area in Albufera de València Natural Park (AVNP) under the scope of a restoration program intended to mimic typical environments such as freshwater springs, abundant in the past but currently suffering from deterioration (desiccation, pollution, etc.), with the ultimate goal of increasing local biodiversity of submerged macrophytes, particularly charophytes. In this study we have monitored, from April 2009 (a few months after its first flooding) to September 2012, the dynamics of charophyte growth and related physical, chemical and biotic variables to highlight the factors determining charophyte success. Just after…
Aproximación a las comunidades de carófitos que existieron en la albufera de valencia a partir del estudio de las oósporas del sedimento
14 páginas, 8 figuras, 3 tablas.
Reconstruction of the former charophyte community out of the fructifications identified in Albufera de València lagoon sediments
Abstract Several decades ago, due to eutrophication, Albufera de Valencia lagoon lost the charophyte meadows that covered the bottom in the past but had never been studied in detail. An area close to the lagoon will be restored now to improve water quality and to recover submerged vegetation. To have information on the background of the charophytes from this area, four 80–87 cm long sediment cores were extracted from the lagoon. The subfossil charophyte fructifications (oospores and gyrogonites) were isolated and identified in two of the four cores. Moreover, sediment core fractions from the third and fourth cores were allowed to germinate under several conditions. The study of the lagoon s…
Restoration of two small Mediterranean lagoons: The dynamics of submerged macrophytes and factors that affect the success of revegetation
Abstract Two small, shallow lagoons newly created from former rice fields in the Mediterranean coast (Albufera de Valencia Natural Park, Spain) were restored by planting several species of submerged macrophytes (Myriophyllum spicatum, Ceratophyllum demersum, Potamogeton spp., Zannichellia peltata and Ranunculus peltatus) in 2008. Charophytes also appeared spontaneously. M. spicatum was the species that dominated both lagoons and almost completely covered their surface. M. spicatum reached a high biomass and displayed a seasonal pattern, declining during the cold season and reappearing in the spring. No submerged vegetation was observed in the lagoons from 2011 onward. The major purpose of t…
Assessing the potential of Albufera de València Lagoon sediments for the restoration of charophyte meadows
Abstract Albufera de Valencia Lagoon, the largest littoral lagoon on the Iberian Peninsula, has been affected by eutrophication processes since the 1970s due to the direct dumping of sewage waters of industrial, agricultural and urban origin. Consequently, the submerged vegetation that covered the bottom of the lagoon has been lost (charophytes and Potamogeton spp., Myriophyllum spp. and Ceratophyllum spp.). Despite efforts to improve water quality, this vegetation has not recovered. No information about the potential of the recent sediments to host charophyte development is available. In this study, we analysed several sediment cores taken from different areas of the lagoon to determine th…