Assessment of lakes and ponds in the Duero basin based on the macrophyte flora

作者：Flor Amau Naria^*; Cambra Sanchez Jaume; Velasco i Batlle Eulalia

来源：Limnetica, 2013, 32(2): 373-390.

• Duero basin
• aquatic macrophytes
• I-H index
• anthropogenic disturbances

During the summer of 2005, a survey was carried out in 71 lakes and ponds of the Duero basin. Thirty nine of those pools had water during the sampling survey, in twenty six sites, thirty two hydrophyte species considered by the hi index were collected. It was observed that: 1) hydrophyte species differed in their optimum growth along a stress gradient calculated from different variables and field observations; 2) the most influent variables regarding the presence of macrophytes in a water body were the hydroperiod and the anthropogenic disturbances related to agricultural and livestock activities; 3) the best ecological quality systems were those located at higher altitudes, with cold and low mineral content waters and with less anthropogenic disturbances; 4) the majority of the localities were poorly conserved, in comparison with previous studies and, finally, 5) many of the studied systems, even with some kind of protection, had lost the categories proposed by Cirujano et al. (1992): wetland with %26quot;singular interest%26quot;, wetland with %26quot;national%26quot; or with %26quot;European significance%26quot;.

• 出版日期2013-12