Untitled

Abstract

In order to determine the relationships between the dynamics of benthic macroinvertebrates (both species number and individual number) and environmental variables, sampling was made at four different stations at monthly intervals during a year between March 2004 and January 2005 of Lake Gala which is a part of an important wetland and a national park in European part of Turkey (Enez/Edirne). Altogether, a total of 49 zoobenthic taxa which were grouped as "Oligochaeta", "Chironomidae", and "Varia", comprised of 1,628 individuals in per m 2 at average were recognised in the sampling stations of the Lake. The present study showed that larval chironomids comprising 57% abundance of the total specimens are the biggest part of benthic macroinvertebrates. It is followed by oligochaetes and the group varia comprising 34% and 9% abundance, respectively. Also, it was seen changing that the composition of zoobenthic group dominancy in the Lake as time passes.Furthermore, according to Shannon-Weaner index, species diversity for zoobenthic macroinvertebrate fauna of the lake was found as H'=1.21 at average. Also, similarities of the sampling stations and months, both the dynamics of benthic macroinvertebrates and physicochemical features were evaluated by using Bray-Curtis similarity index.According to Spearman correlation index, relationship between the number of individuals and some physicochemical variables such as temperature, turbidity (light permeability), and depth of the lake was determined statistically significant.

Metazoan parasites of fish species from Lake Gala (Edirne, Turkey)

“…Previous studies on Lake Gala have determined its trophic status (Baran and Ongan., 1988;Kırgız, 1988;Ortak and Kırgız, 1988;Erdoğan and Güher, 2005;Çamur-Elipek et al, 2008Çamur-Elipek et al, , 2010. Lake Gala can be termed as eutrophic regarding the rotifera species identified (Erdoğan and Güher, 2005).…”

“…Paddy fields periodically use the lake water for irrigation; later on, remaining water is pumped back to the lake which is charged with chemicals (pesticides and fertilizers). Benthic fauna of the lake dominated by two groups (Chironomidae and Oligochaeta), which are known to be pollution-tolerant organisms (Çamur-Elipek et al, 2010). Pollutants are toxic both to fish and invertebrate hosts; furthermore there are direct effect of pollutants on parasites and their free-living stage (Poulin, 1992).…”

“…In the lake, Gastropoda (Unio sp., Viviparus sp. and Planorbiidae) were found to have the lowest prevalence (2.8%) of all taxa (Çamur-Elipek et al, 2010). The presence of gastropods is important in the transmission of digenetic trematodes (Paperna, 1996).…”

“…Çamur-Elipek et al, (2008) studied physico-chemical characteristics and benthic macroinvertebrates. Çamur-Elipek et al, (2010) studied benthic invertebrates in relation to environmental variables. However, there has been no investigation on parasites of fish species of Lake Gala.…”

Aquatic Oligochaetes Biodiversity in Turkey: Example of Lake Sapanca with Application of the Biotic Indices

“…Oligochaeta, a subclass of the Clitellata, are broadly distributed worldwide and frequently are the most abundant in many freshwater ecosystems and they are widely used for monitoring river and lake pollution. Despite, studies about freshwater oligochaeta have increased in recent years such as, [1], [2], [3], [4], [5], [6] regarding our knowledge of the freshwater oligochaeta fauna of Turkey, large areas still remain under-or even unexplored. Up to now, only 107 species (5 of them endemic) have been reported from different parts of Turkey.…”