خيارات البحث
النتائج 1 - 10 من 1,068
Side-effects of pesticides on ground-dwelling predatory arthropods in arable ecosystems.
1989
Everts J.W. | Aukema B. | Hengeveld R. | Koeman J.H.
Effects of cadmium, copper, lead and zinc on growth, reproduction and survival of the earthworm Eisenia fetida (Savigny): assessing the environmental impact of point-source metal contamination in terrestrial ecosystems.
1994
Spurgeon D.J. | Hopkin S.P. | Jones D.T.
Fluctuating asymmetry of invertebrate populations as a biological indicator of environmental quality.
1993
Clarke G.M.
Les modifications chimiques de l' atmosphere et leurs effets sur l' environnement.
1988
Megie G.
Assessing the impact of copper on nematode communities from a chronically metal-enriched estuary using pollution-induced community tolerance.
1995
Millward R.N. | Grant A.
The environmental situation in Baltic countries and their environmental management strategy.
1994
Kairiukstis L.
The river Tara [Montenegro, Yugoslavia]: water quality, state, problems, protection
1997
Djuraskovic, P.N. | Pejovic, M. (Republicki hidrometeoroloski zavod, Podgorica (Yugoslavia))
The river Tara (Montenegro, Yugoslavia) is under the treatment of the international (UNESCO) and domestic legal protection, so the prescribed quality of its water is the 1st class. Permanent measurement of the water quality of this river shows that due to the influence of the human factor, its quality has been endangered. Examination of the data collected through many years at all the measurement station along its current shows that the quality of water and pollution estimate have changed.
اظهر المزيد [+] اقل [-][Physical and chemical characteristics of the Danube river and a part of the Danube-Tisza-Danube channel [Serbia, Yugoslavia] during the period 1991-1996]
1997
Bugarski, R. | Berkovic, M. (Republicki hidrometeoroloski zavod Republike Srbije, Beograd (Yugoslavia))
Drainage of industrial and communal effluents, directly into the water flow, as many hydrotechnical activities, significantly influence the schedule and balance of the processes that take place into water. In this paper, there are represented the results of systematic control of the water quality of the Danube river and DTD (Danube-Tisza-Danube) channel on the parts Vrbas-Bezdan and Becej-Bogojevo, at the control station network of the Republic Weather Bureau (the Republic of Serbia), for the period of 1991-1996. The results show that the most adverse influence of anthropogenic factor is on the part of the flow of the DTD (Danube-Tisza-Danube) channel from Vrbas to the flow into Tisza river.
اظهر المزيد [+] اقل [-]Marine sponges as coastal bioindicators of rare earth elements bioaccumulation in the French Mediterranean Sea
2022
Orani, Anna Maria | Vassileva, Emilia | Thomas, Olivier P.
In recent years, the widespread use of rare earth elements (REEs) has raised the issue of their harmful effects on the aquatic environment. REEs are now considered as contaminants of emerging concern. Despite the increasing interest of REEs in modern industry, there is still a lack of knowledge on their potential impact on the environment and especially in the marine environment. In this context, the need for monitoring tools to assess REEs pollution status in marine ecosystems is considered as the first step towards their risk assessment. Similar to mussels, filter-feeder sponges have emerged as a key bio-monitor species for marine chemical pollution. Their key position at a low level of the trophic chain makes them suitable model organisms for the study of REEs potential transfer through the aquatic food web. We therefore undertook a comparative study on seven marine sponge species, assessing their capability to bioaccumulate REEs and to potentially transfer these contaminants to higher positions in the trophic chain. A spike experiment under controlled conditions was carried out and the intra- and inter-species variability of REEs was monitored in the sponge bodies by ICP-MS. Concentrations were found to be up to 170 times higher than the corresponding control specimens. The tubular species Aplysina cavernicola showed the highest concentrations among the studied species. This study shows, for the first time, the potential of marine sponges as bio-monitor of REEs as well as their possible application in the bioremediation of polluted sites.
اظهر المزيد [+] اقل [-]