Abstract

IANNACONE, José; MANSILLA, Jaime  and  VENTURA, Karen. Macroinvertebrados en las lagunas de Puerto Viejo, Lima - Perú. Ecol. apl. [online]. 2003, vol.2, n.1, pp.116-124. ISSN 1726-2216.

A study was performed to evaluate the biodiversity and similarity of benthic macroinvertebrates of the Puerto Viejo Lagoons from15 july to 15 october, 2001. Seven samplings (Sa) were conducted in eight spatial stations (St) in their natural and artificial lagoons. The alpha diversity was calculated using the Shannon-Wiener (H´), evenness of Pielou and dominance of Simpson (C) indexes. Beta diversity was determined employing quantitative Sörensen and Morisita-Horn indexes. A total of 5519 specimens belonging to three phyla, six orders, nine families and ten species were collected from macrozoobenthos during all the study. The most abundant taxa were Melanoides tuberculata (Müller) (Mesogastropoda: Thiaridae) with 3276 individuals (59,36 %), Chironomus sp. (Diptera: Chironomidae) with 1281 individuals (23,21 %) and Heleobia cumingii (Orbigny) (Mesogastropoda: Hydrobiidae) with 891 specimens (16,14 %). These three species had a crowded spatial distribution in all the samplings. The values of alpha diversity: the Shannon-Wiener, equableness of Pielou and Simpson indexes did not change significantly among the seven samplings and in the eight surveyed stations. The values of beta diversity (quantitative indexes of Sörensen and Morisita- Horn) were higher between Sa3 and SA4; and also in Sa5, Sa6 and Sa7 between each other. For the eight spatial stations Sörensen and Morisita- Horn cuantitative indexes showed a similarity over 70% between St3- St4; St4- St6 and St5- St7. St2- St6 showed the highest disssimilarity employing both cuantitative indexes. 

Keywords : Chironomus; Heleobia; macrozoobentos; Melanoides; Peru; wetlands.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )