BACKGROUND Nowadays, aquatic organisms are used as bio-indicators to assess ecological water quality in western regions, but have hardly been used in an Iranian context. We, therefore, evaluated the suitability of several indices to assess the water quality for an Iranian case study. METHODS Measured data on biotic (fish and macroinvertebrates) and abiotic elements (28 physicochemical and hab...

A. M. Ellison ([email protected]) , Harvard Forest, Harvard Univ., 324 North Main Street, Petersham, MA 01366, USA . – L. Adamec , Inst. of Botany, Academy of Sciences of the Czech Republic, Section of Plant Ecology, Dukelsk á 135, CZ-379 82 T ř ebo ň , Czech Republic. Oikos 000: 1–11, 2011 doi: 10.1111/j.1600-0706.2011.19604.x © 2011 Th e Authors. Oikos © 2011 Nordic Society Oikos Subje...

This mini-review summarizes our experimental data devoted to constitutive and inducible mechanisms of defense in biosystems of various levels of organization. Autoand heterotrophic components of the transformed hydroecosystems are taken into consideration. The role of higher aquatic plants in the defense mechanisms is considered.

in order to evaluate the phragmites australis, myriophyllum spicatum and potamogeton perfoliatus aquatic plant species as an indicator organism of heavy metals pollution in bio-monitoring studies of the aquatic ecosystems, the aim of this study was to determine the levels of heavy metals accumulation zn, cu, pb and cd in sediments, roots, stems and leaves of these plants in north and south of t...

Wetlands are often considered sinks for contaminants, and Aquatic plants have been shown to play important roles in wetland biogeochemistry through their active and passive circulation of elements. In this research, in order to evaluate the concentration level of heavy metals released by the urban, industrial and agricultural activities at the margin of the rivers flowing into Anzali lagoon, as...

Herbivores induce plants to undergo diverse processes that minimize costs to the plant, such as producing defences to deter herbivory or reallocating limited resources to inaccessible portions of the plant. Yet most plant tissue is consumed by decomposers, not herbivores, and these defensive processes aimed to deter herbivores may alter plant tissue even after detachment from the plant. All con...

Aquatic macrophytes have been widely studied because of their capability of absorbing contaminants from water and their subsequent use in biomonitoring. This study presents a comparison of Cr accumulating potential of submerged aquatic plants viz Vallisneria spiralis and Hydrilla verticillata. These plants were treated with various concentrations of treated tannery effluent collected from UASB,...

Several aquatic species were examined as potential phytoremoval agents for selenium in aqueous solutions. Selenium was initially present in concentrations of 0-100 ppm Se (as sodium selenite) in 10% Hoagland’s medium, and aquatic plants were grown in the medium for one week. Four aquatic plants were studied: Cattail ( Typha domingensis ), duckweed ( Lemna obscura ), hydrilla ( Hydrilla verticil...

• Underwater photosynthesis by aquatic plants is often limited by low availability of CO(2), and photorespiration can be high. Some aquatic plants utilize crassulacean acid metabolism (CAM) photosynthesis. The benefits of CAM for increased underwater photosynthesis and suppression of photorespiration were evaluated for Isoetes australis, a submerged plant that inhabits shallow temporary rock po...

The distribution of perfluorinated compounds (PFCs) in Baiyangdian Lake, China, was determined in this study. Perfluorooctanoic acid (PFOA) was the dominant PFC in lake water (1.70–73.5 ng L , median 9.72 ng L ), while perfluorooctane sulfonate (PFOS) was the dominant PFC in sediments (0.06–0.64 ng g 1 dry wt, median 0.19 ng g 1 dry wt) and in aquatic animals (0.57–13.7 ng g 1 wet wt, median 2....