To cite this abstract / Pentru a cita rezumatul:
Petrisor AI (2000), Study about the Degradation of the Lentic Ecosystems in Pantelimon Lakes, Bulletin of the South Carolina Academy of Science 62:76-77

Study about the Degradation of the Lentic Ecosystems in Pantelimon Lakes (Bucharest, Romania)

Alexandru I. Petrisor
BS, University of South Carolina, Columbia, USA

Abstract
The degradation of the community characteristic to Pantelimon Lakes represents an important problem, due to the local economical value of the area. This study is investigating the evolution of the quality of the lentic ecosystems in the area by comparing the community across the period 1994-1998, based on sportive fishing data.
The statistical analyses compared the diversity of the communities, expressed as entropy, and the frequency distributions of the species in the community across the study period, using the chi-square test for the goodness of fit of two empirical distributions.
The computation of the values of the informational entropies did not reveal any obvious trend of diversity loss. The comparison of the informational entropies demonstrated a certain decreasing tendency of the diversity, indicating the simplification of the community. The comparison of the frequency distributions of the species in the community indicated significant changes in the structure of the community. The limitations of this study are first related to the use of sportive fisherman data. The power of the tests that were used was sufficient to detect any possible difference.
The significant changes in the structure of the community characteristic to Pantelimon lakes confirm the hypothesis of the degradation of its quality through the loss of species diversity. In this case, further research is recommended, as well as promoting environmental protection and reconstruction measures at the local level.