Water Quality, Sediment Characteristics and Benthic Status of the Razim-Sinoie Lagoon System, Romania

Abstract

Razim Lake is the biggest of Romania’s freshwater lakes and along with other basins as Golovita, Zmeica and Sinoie constitutes a system of great ecological significance, playing also an essential role in the supply of water for irrigation, fishery exploitation, farming, flood prevention, recreational navigation and water tourism. Due to their importance, the environmental conditions in the Razim - Sinoie coastal lakes have attracted an increased public attention in contemporary society. To assess the levels, dissemination and potential sources of contamination in the above-mentioned lagoon system, random sampling was used to collect water and sediment samples from every lake and several analytical techniques were performed to investigate their environmental characteristics. The results obtained from this study indicated that, in water, concentrations of various physico-chemical parameters are, mostly, in agreement with correlated environmental standards. Slight variations and/or occasional exceeding of the maximum admissible limits were generally limited to small areas showing levels that would not warrant special concern. In sediments, the mean concentrations of some specific trace metals were below the levels of potential effect. Benthic samples revealed 31 taxa belonging to 16 zoo-benthal subdivisions. The results of this study showed good ecological status despite local several natural and anthropogenic stressors as fishery exploitation, farming, recreational navigation and water tourism.

Physicochemical analysis of water and sediments of Usuma Dam, Abuja, Nigeria

“…The results of the physicochemical analysis of the water and sediments of the Usuma Dam are presented in Fig [14]. The pH values of the water were between 6.62±0.01 -9.32±0.06 while the sediment pH was between 4.53±0.33 -6.34±0.01 ( Figure 2).…”

Dampak Pemukiman Dan Kegiatan Di Tepi Sungai Terhadap Kualitas Air Sungai Baru Barat

“…TSS will increase water turbidity due to reduced light penetration which it's damages the photosynthetic activity of aquatic plants and decreases the oxygen content in water (Butler and Ford, 2018 (Chowdhury et al, 2018). Water quality is affected by land use and anthropogenic activities on river banks (Suratman and Norhayati, 2013) The decomposition of organic substances in the sediment of need oxygen , this will disrupting the lives of fish and an organism benthic (Catianis et al, 2018). Human activities that disturb the waters will affect the quality of the waters and services provided by, aquatic ecosystems (Shen et al, 2017).…”

A conservation palaeobiological approach to assess faunal response of threatened biota under natural and anthropogenic environmental change

“…Today, the Periboina and Edighiol channels remain the only (and highly restricted) connections between Lake Sinoie and the marine realm. As a result, the RSL has considerably freshened over the past 100 years (Stȃnicȃ, 2011;Catianis et al, 2018).…”

“…Such conditions have existed in the RSL throughout the late Holocene. Since 2000, however, the mixed Pontocaspian assemblages gave way to freshwater assemblages (Catianis et al, 2018).…”

“…Before 1956, about 70 % of the species living in the benthic zone had a Pontocaspian origin, and remaining species belonged to other brackish or freshwater species (Teodorescu-Leonte et al, 1956). After 2000, this relationship shifted completely and the dominant forms seemed to be freshwater species (Catianis et al, 2018).…”