17 Result(s)
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Article
Rare earth elements in sediments of the Pearl River Estuary, China: distribution, influencing factors, and multi-index assessment
The main objectives of this study were to investigate the distribution characteristics and evaluate the potential ecological hazard associated with rare earth elements (REEs) within the Pearl River Estuary (PR...
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Article
The anthropogenic effects on organic matter in sediment core based on Bayesian mixing model: a case study of Daya Bay
Sediment is an important carrier of evidence about environmental evolution which receives huge volumes of organic material originated from both anthropogenic and natural sources. In this study, based on sedime...
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Article
Ecotoxicological risk of antibiotics and their mixtures to aquatic biota with the DGT technique in sediments
Antibiotics are emerging contaminants and widely used in human healthcare, livestock, and aquaculture. The toxicity posed by antibiotics and their mixtures in sediments depends on their bioavailability. Now, t...
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Article
Open AccessRisk assessment of eight metals and their mixtures to aquatic biota in sediments with diffusive gradients in thin films (DGT): a case study in Pearl River intertidal zone
The ecotoxicological risk posed by metals and their mixtures in sediments depends on their bioavailability. Many methods for evaluating the bioavailability of metals in sediments/soils are time-consuming and e...
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Article
Interactive effect of water level and flushing rate on population dynamics of a harmful cyanobacterial species: Raphidiopsis raciborskii
Changes in water level and flushing rate directly affect to a large extent the biomass of harmful cyanobacteria, and drive the shift of phytoplankton composition between cyanobacteria dominance/non-dominance i...
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Article
A new method for estimating sedimental integrated toxicity of heavy metal mixtures to aquatic biota: a case study
The existing methods of measuring combined toxicity of heavy metal mixtures in environment do not fully consider three major factors (i.e., number of heavy metal species, aquatic biota, all investigated sites ...
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Article
Species diversity and seasonal dynamics of filamentous cyanobacteria in urban reservoirs for drinking water supply in tropical China
Filamentous cyanobacteria have been observed to become the dominant species in reservoirs, especially in small reservoirs for drinking water supply in southern China. The occurrences of filamentous cyanobacter...
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Article
Seasonal variation of microcystins and their accumulation in fish in two large shallow lakes of China
Bioaccumulation of microcystins (MCs) has been widely observed in aquatic vertebrates and invertebrates, but its seasonal and specific variations remain unclear. In the present study, dissolved MCs in water, a...
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Article
Effects of organic acids on the photosynthetic and antioxidant properties and accumulations of heavy metals of Melilotus officinalis grown in Cu tailing
The effect of citric acid (CA), acetic acid (Ac), and ethylene diamine tetraacetic acid (EDTA) on the photosynthetic and antioxidant properties and the accumulation of some heavy metals (HMs) of Melilotus officin...
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Article
Organic acids on the growth, anatomical structure, biochemical parameters and heavy metal accumulation of Iris lactea var. chinensis seedling growing in Pb mine tailings
The effect of citric acid (CA) and ethylene diamine tetraacetic acid (EDTA) on the growth, anatomical structure, physiological responses and lead (Pb) accumulation of Iris lactea var. chinensis seedling growing i...
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Article
Novel polymorphism of internal transcribed spacers (ITS) and their utilization in phylogenetic analysis of Neanthes glandicincta (Annelida: Polychaeta: Nereididae)
Sequences of internal transcribed spacers (ITS1 and ITS2) are increasingly being used to infer phylogenetic relationships at or below species levels. Here we report a novel case of ITS polymorphism within Neanthe...
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Article
Survivals of D. galeata in sub-tropical reservoirs: harmful effects of toxic cyanobacteria in food source
In the present study, we tested the hypothesis that massive occurrence of cyanobacteria as food source is one of the factors limiting the distribution of the zooplankton Daphnia galeata in the warm water reservoi...
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Article
Evidence of iron cyanides as supplementary nitrogen source to rice seedlings
The effect of iron cyanides on activities of nitrate reductase (NR) and glutamine synthetase (GS) of plants was investigated. Young rice seedlings (Oryza sativa L. cv. XZX 45) were grown in the nutrient solutions...
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Article
The physiological response and sub-cellular localization of lead and cadmium in Iris pseudacorus L.
The seedling development and physiological responses of Iris pseudacorus L. to Pb and Cd and their combination were studied for 28 days liquid culture and sub-cellular localization of Pb and Cd in the root tip ce...
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Article
Effects of norfloxacin and butylated hydroxyanisole on the freshwater microalga Scenedesmus obliquus
The toxic effects of norfloxacin (NOR) and butylated hydroxyanisole (BHA) on the microalga Scenedesmus obliquus were assessed in terms of growth rate, concentration of chlorophyll a, activities of 7-ethoxyresoruf...
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Article
Tolerance and accumulation of lead by species of Iris L.
Seedling development, accumulation and distribution of lead (Pb) in Iris lactea var. chinensis (Fisch.) Koidz. and I. tectorum Maxim. were studied using plants grown in sand culture and exposed to 0–10 mmol l−1 c...
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Article
Cadmium tolerance and accumulation by two species of Iris
Seedlings of Iris lactea var. chinensis (Fisch.) Koidz. and I. tectorum Maxim. were subjected to 0–160 mg l−1 Cd in hydroponic system and harvested after 42 days to determine effects on root and shoot dry mass. A...
