TY - JOUR T1 - The effect of increased water level on Isoetes lacustris L. in Lake Baciver, Spain JF - Journal of Aquatic Plant Management Y1 - 1996 A1 - Gacia, E. A1 - Ballesteros, E. SP - 57 EP - 59 KW - Anoxia KW - Leaf primary production KW - Light KW - Oxygen KW - Pyrenees KW - Water level fluctuations AB - Ten months after flooding lake Baciver, water levels were 5.5 m higher than the previous normal and the area formally occupied by the Isoetes population was reduced. All Isoetes originally present below 0.6 m died, and only plants standing between 5.8 and 6.1 m (new depth) survived. As irradiance decreased, remaining individuals produced fewer leaves, but their biomass production was higher, as leaf length increased in response to the diminished available irradiance. Because leaf mortality was excessive, regeneration capacity, population performance and dynamics were adversely affected. In 1992, no new production occurred in Isoetes lacustris individuals surviving after the winter. We suggest that low surface oxygen levels at the water column under the ice, and total anoxia below 6 m depth, caused the demise of the I. lacustris population in Lake Baciver. VL - 34 UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-0030188498&partnerID=40&md5=76a5af33fa658c06abddf82d836c45a5 IS - 2 N1 - Cited By (since 1996):7Export Date: 11 November 2013Source: Scopus ER -