The Experts below are selected from a list of 29580 Experts worldwide ranked by ideXlab platform
Hesam Kamyab - One of the best experts on this subject based on the ideXlab platform.
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comprehensive review on phytotechnology heavy metals removal by diverse Aquatic Plants species from wastewater
Journal of Hazardous Materials, 2016Co-Authors: Shahabaldin Rezania, Shazwin Mat Taib, Mohd Fadhil Md Din, Farrah Aini Dahalan, Hesam KamyabAbstract:Environmental pollution specifically water pollution is alarming both in the developed and developing countries. Heavy metal contamination of water resources is a critical issue which adversely affects humans, Plants and animals. Phytoremediation is a cost-effective remediation technology which able to treat heavy metal polluted sites. This environmental friendly method has been successfully implemented in constructed wetland (CWs) which is able to restore the Aquatic biosystem naturally. Nowadays, many Aquatic plant species are being investigated to determine their potential and effectiveness for phytoremediation application, especially high growth rate Plants i.e. macrophytes. Based on the findings, phytofiltration (rhizofiltration) is the sole method which defined as heavy metals removal from water by Aquatic Plants. Due to specific morphology and higher growth rate, free-floating Plants were more efficient to uptake heavy metals in comparison with submerged and emergent Plants. In this review, the potential of wide range of Aquatic plant species with main focus on four well known species (hyper-accumulators): Pistia stratiotes, Eicchornia spp., Lemna spp. and Salvinia spp. was investigated. Moreover, we discussed about the history, methods and future prospects in phytoremediation of heavy metals by Aquatic Plants comprehensively.
Hui Feng - One of the best experts on this subject based on the ideXlab platform.
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biomonitoring and ecological restoring heavy metal polluted water by Aquatic Plants
Journal of Anhui Agricultural Sciences, 2013Co-Authors: Hui FengAbstract:Aquatic Plants have excellent ability in biomonitoring and ecological restoring heavy metal polluted water.Bryophytes are excellent biomonitors of heavy metal pollution,so they can be used to monitor and evaluate the heavy metal contamination level of the studied water.Moreover,four life forms of Aquatic Plants(including emergent,free-drifting,floating-leaved and submergent) all have certain accumulation capacity on heavy metals,so they are appropriate materials for ecological restoring of heavy metal polluted water.Using Aquatic Plants to treat heavy metal polluted water is a simple and low cost method,and won't bring secondary pollution.This phytoremediation method can not only restore heavy metal pollution,but also prettify the environment and bring direct and indirect economic benefits.
Philippe Eullaffroy - One of the best experts on this subject based on the ideXlab platform.
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toxicity and removal of pesticides by selected Aquatic Plants
Chemosphere, 2008Co-Authors: Rachel Olette, Michel Couderchet, Sylvie Biagianti, Philippe EullaffroyAbstract:Pesticides are being detected in water bodies on an increasingly frequent basis. The present study focused on the phytoremediation potential of selected Aquatic Plants to remove phytosanitary products from contaminated water. We investigated the uptake capacity of Lemna minor (L. minor), Elodea canadensis (E. canadensis) and Cabomba Aquatica (C. Aquatica) on three pesticides: copper sulphate (fungicide), flazasulfuron (herbicide) and dimethomorph (fungicide). Pesticide toxicity was evaluated by exposing Plants to five concentrations (0-1 mg L(-1)) in culture media for 7d using chlorophyll fluorescence as a biomarker. The toxicity of the contaminants was the same for all the Aquatic Plants studied and occurred in this descending order of toxicity: flazasulfuron>copper>dimethomorph. We found that L. minor had the most efficient uptake capacity, followed by E. canadensis and then C. Aquatica. The maximum removal rate (microg g(-1)fresh weight d(-1)) of copper, flazasulfuron and dimethomorph was 30, 27 and 11, respectively.
Joël Robin - One of the best experts on this subject based on the ideXlab platform.
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Determination of tipping points for Aquatic Plants and water quality parameters in fish pond systems: A multi-year approach
Ecological Indicators, 2016Co-Authors: Marie Vanacker, Alexander Wezel, Florent Arthaud, Mathieu Guérin, Joël RobinAbstract:High levels of nutrients in fish ponds by fish farming may cause significant eutrophication leading to a loss in species richness and a decrease of cover of Aquatic Plants to phytoplankton dominance. This shift can be represented by a tipping point where a significant change in the state of the ecosystem is observed such as a change from high to low Aquatic Plants species richness and cover. A total of 100 fish ponds were studied during five years in the Dombes region, France, to determine tipping points in Aquatic plant richness and cover using chlorophyll alpha (CHL), water transparency, Total N (TN) and Total P (TP) gradients with two statistical methods. The relationships between tipping points, nutrient loads and yearly variations in weather conditions were also evaluated. Looking at the five years data, tipping points were observed in Aquatic plant richness at 6 and 60 mu g/l for CHL, and at 3.90 mg/L for TN concentration; as well as at 70 cm for water transparency, but no tipping point was found with TP. For Aquatic plant cover, tipping points were observed at 11 mu g/L. for CHL, 2.42 mg/L for TN, 0.05 mg/L for TP, and at 62 cm for water transparency. These tipping points showed a significant decrease of Aquatic plant species richness and cover, linked to the nutrient concentrations which drive the competition between the primary producers phytoplankton and Aquatic Plants. However, tipping points could vary significantly between years. The inter-annual variability may be due to an early occurrence of phytoplankton blooms in some ponds in a year preventing the establishment of Aquatic Plants, and thus influencing the value of tipping points. Weather conditions influence the competition between primary producers by impacting chlorophyll a and nutrients concentrations. When weather conditions supported increased nutrient concentrations, the development of phytoplankton and Aquatic Plants was facilitated and tipping points in Aquatic plant richness and cover occurred with relatively high values. Thus, a significant decrease of plant cover and richness occurred at higher level of nutrients compared to the other years. In these cases, Aquatic Plants dominated over phytoplankton for the spring period, and also often during summer. In conclusion, tipping points observed are mainly linked to the competition between Aquatic Plants and phytoplankton. In shallow and eutrophic systems like fish ponds where nutrients are not a limiting resource, weather conditions act temporarily during spring as the main regulator of this competition.
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Eutrophication and drought disturbance shape functional diversity and life-history traits of Aquatic Plants in shallow lakes
Aquatic Sciences - Research Across Boundaries, 2012Co-Authors: Florent Arthaud, Joël Robin, Dominique Vallod, Gudrun BornetteAbstract:Theories that link plant strategies and abiotic filters discriminate between three strategies: competitive, ruderal or stress-tolerant species, and suggest that func- tional diversity is higher at intermediate values along the gradients of productivity and disturbance. The mechanism by which abiotic filters screen plant traits in Aquatic plant communities has been poorly tested and has led to con- trasting results. The present study aimed to test whether functional diversity and abundance of life-history traits corresponding to morphology, fecundity and longevity of Aquatic Plants were linked to disturbance and productivity. Fifty-nine shallow lakes that were arranged along a gra- dient of productivity (estimated through total phosphorus concentration) and drought-disturbance frequency were sampled for Aquatic Plants. Species traits were documented and functional diversity was calculated (richness, disper- sion and evenness) for each lake. Increasing total phosphorus concentration was associated with decreased functional richness and dispersion but not functional evenness. Functional diversity did not differ according to disturbance frequency, regardless of the index that was measured. High productivity favoured floating species with storage organs and vegetative reproduction, especially at low disturbance frequency. For all disturbance frequencies, low productivity favoured small species without storage organs and sexual reproduction. The present study partly supports the theoretical model. At high productivity levels,because phytoplankton is a better competitor for light than Aquatic Plants, plant traits are screened stringently, and species with traits that allow them to reach the photic zone are selected.
Sara Puijalon - One of the best experts on this subject based on the ideXlab platform.
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Biomechanical responses of Aquatic Plants to aerial conditions
Annals of Botany, 2013Co-Authors: Elena Hamann, Sara PuijalonAbstract:Background and Aims Wetlands are impacted by changes in hydrological regimes that can lead to periods of low water levels. During these periods, Aquatic Plants experience a drastic change in the mechanical conditions that they encounter, from low gravitational and tensile hydrodynamic forces when exposed to flow under Aquatic conditions, to high gravitational and bending forces under terrestrial conditions. The objective of this study was to test the capacity of Aquatic Plants to produce self-supporting growth forms when growing under aerial conditions by assessing their resistance to terrestrial mechanical conditions and the associated morpho-anatomical changes. Methods Plastic responses to aerial conditions were assessed by sampling Berula erecta, Hippuris vulgaris, Juncus articulatus, Lythrum salicaria, Mentha Aquatica, Myosotis scorpioides, Nuphar lutea and Sparganium emersum under submerged and emergent conditions. The cross-sectional area and dry matter content (DMC) were measured in the plant organs that bear the mechanical forces, and their biomechanical properties in tension and bending were assessed. Key Results All of the species except for two had significantly higher stiffness in bending and thus an increased resistance to terrestrial mechanical conditions when growing under emergent conditions. This response was determined either by an increased allocation to strengthening tissues and thus a higher DMC, or by an increased cross-sectional area. These morpho-anatomical changes also resulted in increased strength and stiffness in tension. Conclusions The capacity of the studied species to colonize this fluctuating environment can be accounted for by a high degree of phenotypic plasticity in response to emersion. Further investigation is however needed to disentangle the finer mechanisms behind these responses (e.g. allometric relations, tissue make-up), their costs and adaptive value.
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Response of Aquatic Plants to abiotic factors: a review
Aquatic Sciences, 2011Co-Authors: Gudrun Bornette, Sara PuijalonAbstract:This review aims to determine how environmental characteristics of Aquatic habitats rule species occurrence, life-history traits and community dynamics among Aquatic Plants, and if these particular adaptations and responses fit in with general predictions relating to abiotic factors and plant communities. The way key abiotic factors in Aquatic habitats affect (1) plant life (recruitment, growth, and reproduction) and dispersal, and (2) the dynamics of plant communities is discussed. Many factors related to plant nutrition are rather similar in both Aquatic and terrestrial habitats (e.g. light, temperature, substrate nutrient content, CO_2 availability) or differ markedly in intensity (e.g. light), variations (e.g. temperature) or in their effective importance for plant growth (e.g. nutrient content in substrate and water). Water movements (water-table fluctuations or flow velocity) have particularly drastic consequences on Plants because of the density of water leading to strong mechanical strains on plant tissues, and because dewatering leads to catastrophic habitat modifications for Aquatic Plants devoid of cuticle and support tissues. Several abiotic factors that affect Aquatic Plants, such as substrate anoxia, inorganic carbon availability or temperature, may be modified by global change. This in turn may amplify competitive processes, and lead ultimately to the dominance of phytoplankton and floating species. Conserving the diversity of Aquatic Plants will rely on their ability to adapt to new ecological conditions or escape through migration.
