In order to determinate the concentration of elements: K, Ca, Na, Mg, Cu, Pb, Cr, and Cd in sea water and seagrasses Posidonia oceanica and Cymodocea nodosa sampling were done in the area of the Boka Kotorska Bay (Adriatic sea, Montenegro (Yugoslavia)). For majority of these elements variability of contents in the samples was great, but in the range of expectations. The concentrations of Pb and Cr in the seagrasses were higher from values in literature. Because of bioaccumulation and biomagnification of these metals, we have to investigate causes of these higher concentrations and possibility of toxic effects on the seagrasses and other organisms.

Water quality is a main precondition for use in water supply and bottling. In this paper, a review of Yugoslavian standard referring to maximum allowed concentration of some components, as well as a review of some components contents in prohibited concentrations in Yugoslav and foreign bottling drinking and mineral waters are presented.

In this paper are presented autochthonous and all other alochthonous famous fishes in Lake Ohrid and its catchement area (The Former Yugoslav Republic of Macedonia). Introduction of new species in lakes and rivers in the Former Yugoslav Republic of Macedonia is prohibited, especially in Lake Ohrid and catchement area. The most probable period and possible way of introduction are presented and the reason of that introduction, as well. It is necessary, in the future, more attention to be paid on Lake Ohrid protection from introduction of new species, which may cause big changes in Lake Ohrid dynamics.

During the period May - September 2000, the structure of quality and quantity of Oligochaeta community was investigated on three locations of "Kapetanski rit" fish pond (Serbia, Yugoslavia). At same time were determined some physical and chemical parameters of water temperature, pH value and concentration of dissolved oxygen. In that period of time, the location of Divlje jezero there was no presence of Oligochaeta community. The location of Novo jezero was characterized by 6 species from two families - Naididae and Tubificidae, and the location of Veliko jezero was characterized by only three species. The results from Veliko and Novo jezero show differences in proportional presence and quantity characteristics.

The reaction of Pd(II) with 1,8-dihydroxy-2-(pyrazol-5-ylazo)-naphthalen-3,6-disulphonic acid immobilized by physical sorption onto Dowex 1-X8 ion-exchange resin was investigated with the aim to develop the sorption-spectroscopic test method for the detection of low Pd(II) concentrations in water. The resin phase absorption spectra of the reagent and its Pd(II) complex were followed. The immobilized reagent has the spectral characteristics similar to those in the water and forms with Pd(II) 1:1 complex with the absorption maximum at 650 nm. Parameters, such as pH, wavelength and contact time have been optimized for a given amount of the sorbed reagent. The experimental conditions for the linear dependence of absorbance vs. Pd(II) concentration have been determined.

Effects of vapours of two herbicides on plantlets of fourteen wild higher plant species and two bryophytes were screened in fumigation experiments using foliar injury, chlorophyll fluorescence and growth as response parameters. After vaporisation of the herbicides for 48 h, concentrations in the chambers reached 77 g m−3 in the chlorpropham treatments and 184 ng m−3 in the ethofumesate treatments. Despite the higher concentrations of the volatile chlorpropham (vapour pressure, VP: 1.3 mP), plants showed no foliar injury, but vapours of this herbicide caused leaf crinkling in the agriophyte Agrostemma githago. The less volatile ethofumesate (VP: 0.56 mP) caused foliar injury in all higher species, with lowest no observed effect concentrations (NOECs) of 75 ng m−3. Chlorpropham affected growth only in Agrostemma, while ethofumesate reduced growth in one third of the higher plant species. Chlorophyll fluorescence proved to be a less suitable response parameter compared to foliar injury and growth. No adverse effects were observed in mosses, probably due to the slow growth and hence small doses of herbicides taken up. The extent of foliar injury due to ethofumesate showed a weak positive relationship to relative growth rates and specific leaf area in the tested higher plant species.