scholarly journals Aquatic weevil (Coleoptera: Curculionoidea) assembly response to the different ecological conditions in artificial lakes in central Serbia

2012 ◽  
Vol 64 (4) ◽  
pp. 1523-1531 ◽  
Author(s):  
Snezana Pesic
Keyword(s):  
Aquatic Ecosystems ◽  
Aquatic Systems ◽  
River Ecosystems ◽  
Ecological Conditions ◽  
Ecological Characteristics ◽  
Artificial Lakes ◽  
Indices Of Similarity ◽  
Qualitative Picture

Artificial stagnant aquatic ecosystems such as reservoirs, are suitable for monitoring the succession of biocenoses because they are usually formed by rearrangement of the former current river ecosystems. The weevil assembly, as part of such a dynamic biocenose, develops following host macrophytes. In the frame of weevil fauna studies realized during 2001 and 2002 in wet habitats beside four artificial lakes in Central Serbia (Gruza, Grosnica, Sumarice and Bubanj), the aquatic adults from 13 species, divided into two families, Eryrhinidae (Tanysphyrus lemnae and Notaris scirpi) and Curculionidae (Bagous bagdatensis, B. collignensis, B. lutulentus, Pelenomus canaliculatus, P. comari, P. waltoni, Phytobius leucogaster, Rhinoncus castor, R. inconspectus, R. pericarpius and R. perpendicularis), were collected. The quantitative and qualitative picture of the studied aquatic weevil assemblies, as well as indices of similarity among them, are given and related to the dimensions and ecological characteristics of studied aquatic systems (particularly the level of eutrophication).

scholarly journals Zearalenone Contamination of the Aquatic Environment as a Result of its Presence in Crops / Pojava Mikotoksina U Vodenom Okolišu Zbog Njihove Prisutnosti U Usjevima

2012 ◽  
Vol 63 (4) ◽  
pp. 429-435 ◽  
Author(s):  
Agnieszka Waśkiewicz ◽  
Karolina Gromadzka ◽  
Jan Bocianowski ◽  
Paulina Pluta ◽  
Piotr Goliński
Keyword(s):  
Water Samples ◽  
Aquatic Environment ◽  
Aquatic Ecosystems ◽  
Aquatic Systems ◽  
Water Bodies ◽  
Drainage Ditches ◽  
Crop Fields ◽  
Cereal Samples ◽  
Agricultural Areas ◽  
Control Water

AbstractThe aim of this study was to establish a relation between zearalenone contamination of crops in the Polish province of Wielkopolska and its occurrence in aquatic ecosystems close by the crop fields. Water samples were collected from water bodies such as drainage ditches, wells, or watercourses located in four agricultural areas. Moreover, control water samples were collected from the Bogdanka river, which was located outside the agricultural areas and near an urban area. Cereal samples were collected in the harvest season from each agricultural area close to tested water bodies. Zearalenone (ZEA) was found in all water and cereal samples. The highest concentrations were recorded in the postharvest season (September to October) and the lowest in the winter and spring. Mean ZEA concentrations in water ranged between 1.0 ng L-1 and 80.6 ng L-1, and in cereals from 3.72 ng g-1 to 28.97 ng g-1. Our results confirm that mycotoxins are transported to aquatic systems by rain water through soil.

scholarly journals The prevalence and diversity of AmpC β-lactamase genes in plasmids from aquatic systems

2018 ◽  
Vol 2017 (2) ◽  
pp. 603-611 ◽  
Author(s):  
Roelof Dirk Coertze ◽  
Cornelius Carlos Bezuidenhout
Keyword(s):  
South African ◽  
Aquatic Ecosystems ◽  
Antibiotic Resistance Genes ◽  
Pcr Amplification ◽  
Aquatic Systems ◽  
Bacterial Populations ◽  
Digital Droplet Pcr ◽  
Copy Numbers ◽  
Droplet Pcr ◽  
Plasmid Extraction

Abstract This study aimed to investigate the presence and diversity of AmpC β-lactamase and integrase genes among DNA (genomic and plasmid) from bacterial populations in selected aquatic systems. Following an enrichment step, DNA was isolated and subjected to polymerase chain reaction (PCR) and digital droplet PCR. The intI1 gene and AmpC β-lactamase genes were present in genomic and plasmid DNA from all sites in the Mooi, Crocodile and Marico Rivers, with the exception of intI1 in the Marico River. Digital droplet PCR demonstrated that copy numbers varied considerably (0.0 to 29.38 copies per picogram of DNA). Some samples in which ampC was not detected, intI1 was present. Amplicons of ampC genes were subjected to restriction digest using HindIII. Samples where the restriction markers were absent were purified by cloning followed by plasmid extraction, PCR amplification, and sequencing of individual AmpC gene fragments. Phylogenetic analysis identified all positive AmpC genes as Class C β-lactamases, comprising of ampC, CMY- and ACT-families. Detecting AmpC and intl1 genes on plasmids suggests a high risk of horizontal gene transfer and potential dissemination of these and other antibiotic resistance genes surrounding immediate aquatic environments. Consequences of β-lactamase diversity in aquatic ecosystems are relatively unexplored in South African aquatic ecosystems.

scholarly journals An explicit GIS-based river basin framework for aquatic ecosystem conservation in the Amazon

2016 ◽  
Vol 8 (2) ◽  
pp. 651-661 ◽  
Author(s):  
Eduardo Venticinque ◽  
Bruce Forsberg ◽  
Ronaldo Barthem ◽  
Paulo Petry ◽  
Laura Hess ◽  
...  
Keyword(s):  
River Basin ◽  
Spatial Model ◽  
Aquatic Ecosystems ◽  
Large Scale ◽  
Amazon Basin ◽  
River System ◽  
Aquatic Systems ◽  
Petroleum Exploration ◽  
Infrastructure Development ◽  
Multi Scale

Abstract. Despite large-scale infrastructure development, deforestation, mining and petroleum exploration in the Amazon Basin, relatively little attention has been paid to the management scale required for the protection of wetlands, fisheries and other aspects of aquatic ecosystems. This is due, in part, to the enormous size, multinational composition and interconnected nature of the Amazon River system, as well as to the absence of an adequate spatial model for integrating data across the entire Amazon Basin. In this data article we present a spatially uniform multi-scale GIS framework that was developed especially for the analysis, management and monitoring of various aspects of aquatic systems in the Amazon Basin. The Amazon GIS-Based River Basin Framework is accessible as an ESRI geodatabase at doi:10.5063/F1BG2KX8.

scholarly journals Artificial Aquatic Ecosystems

Water ◽  
2018 ◽  
Vol 10 (8) ◽  
pp. 1096 ◽  
Author(s):  
Chelsea Clifford ◽  
James Heffernan
Keyword(s):  
Aquatic Ecosystems ◽  
Ecological Condition ◽  
Aquatic Systems ◽  
Science And Society ◽  
Social Scientists ◽  
The Earth ◽  
Artificial Ecosystems ◽  
Dynamic Components ◽  
Planning And Construction ◽  
Surface Geomorphology

As humans increasingly alter the surface geomorphology of the Earth, a multitude of artificial aquatic systems have appeared, both deliberately and accidentally. Human modifications to the hydroscape range from alteration of existing waterbodies to construction of new ones. The extent of these systems makes them important and dynamic components of modern landscapes, but their condition and provisioning of ecosystem services by these systems are underexplored, and likely underestimated. Instead of accepting that artificial ecosystems have intrinsically low values, environmental scientists should determine what combination of factors, including setting, planning and construction, subsequent management and policy, and time, impact the condition of these systems. Scientists, social scientists, and policymakers should more thoroughly evaluate whether current study and management of artificial aquatic systems is based on the actual ecological condition of these systems, or judged differently, due to artificiality, and consider resultant possible changes in goals for these systems. The emerging recognition and study of artificial aquatic systems presents an exciting and important opportunity for science and society.

scholarly journals An Explicit GIS-Based River Basin Framework for Aquatic Ecosystem Conservation in the Amazon

2016 ◽  
Author(s):  
Eduardo Venticinque ◽  
Bruce Forsberg ◽  
B. Ronaldo Barthen ◽  
Paulo Petry ◽  
Laura Hess ◽  
...  
Keyword(s):  
River Basin ◽  
Spatial Model ◽  
Aquatic Ecosystems ◽  
Large Scale ◽  
Amazon Basin ◽  
River System ◽  
Aquatic Systems ◽  
Petroleum Exploration ◽  
Infrastructure Development ◽  
Multi Scale

Abstract. Despite large-scale infrastructure development, deforestation, mining and petroleum exploration in the Amazon Basin, relatively little attention has been given to the management scale required for the protection of wetlands, fisheries and other aspects of aquatic ecosystems. This is due, in part, to the enormous size, multinational composition and interconnected nature of the Amazon River system, but also to the absence of an adequate spatial model for integrating data across the entire Amazon Basin. In this data article we present a spatially uniform multi-scale GIS framework that was developed especially for the analysis, management and monitoring of various aspects of aquatic systems in the Amazon Basin. The Amazon GIS-Based River Basin Framework is accessible as an ESRI geodatabase at https://knb.ecoinformatics.org/#view/doi:10.5063/F1BG2KX8.

scholarly journals Insights Into the Prevalence and Impacts of Phthalate Esters in Aquatic Ecosystems

2021 ◽  
Vol 9 ◽  
Author(s):  
N. D. Baloyi ◽  
M. Tekere ◽  
K. W. Maphangwa ◽  
V. Masindi
Keyword(s):  
Aquatic Ecosystems ◽  
Agricultural Land ◽  
Environmental Concern ◽  
Phthalate Esters ◽  
Aquatic Systems ◽  
Future Research ◽  
Waste Dumps ◽  
Endocrine Disrupting ◽  
Living Organisms ◽  
Indirect Route

Phthalate esters (PEs) are by far the most produced and extensively used synthetic organic chemicals with notable applications in many industrial products such as vinyl upholstery, adhesives, food containers, packaging materials, printing inks, adhesives, cosmetics, paints, pharmaceuticals munitions, and insecticides among other. PEs have long been recognised as ubiquitous organic pollutants of prime environmental concern, with urbanisation amongst the main cause and source of these compounds. Due to their notoriety, these compounds are known to pose devastating effects to living organisms including humans. The presence of PEs and their metabolites in the aquatic ecosystems is of concern primarily due to their endocrine disrupting and carcinogenicity properties. Several research studies have reported prevalence, exposure pathways, toxicity, and impacts of PEs in aquatic ecosystems and humans. Their principal routes of exposure could be direct or indirect, of which the direct route include contact, eating, and drinking contaminated foods, and the indirect route constitute aerosols, leaching and other forms of environmental contamination. PEs find way into water systems through means such as effluent discharges, urban and agricultural land runoff, leaching from waste dumps and other diffuse sources. High-end instrumentation and improved methodologies on the other hand have resulted in increased ability to measure trace levels (μg/L) of PEs and their metabolites in different matrices and ecological compartments of water or aquatic ecosystems such as lakes, oceans, rivers, sediments, wetlands and drinking water samples. In light of the above, this article provides an informed and focused information on the prevalence of phthalate esters in aquatic systems and related effects on living organisms and humans. Furthermore, techniques that have enabled the extraction and analysis of these PEs in aquatic samples are also explained. Future research outlooks and needs are also highlighted in this manuscript. This information will be used to better understand their temporal and spatial distributions in the aquatic systems and aid in devising prudent means to curtail their ecological footprints.

scholarly journals Viruses in aquatic ecosystems: important advancements of the last 20 years and prospects for the future in the field of microbial oceanography and limnology

2010 ◽  
Vol 1 (1) ◽  
pp. 97 ◽  
Author(s):  
Stéphan Jacquet ◽  
Takeshi Miki ◽  
Rachel Noble ◽  
Peter Peduzzi ◽  
Steven Wilhelm
Keyword(s):  
Aquatic Ecosystems ◽  
Population Control ◽  
Aquatic Organisms ◽  
Aquatic Systems ◽  
Small Scale ◽  
Sequence Information ◽  
Viral Ecology ◽  
Wide Range ◽  
Near Term ◽  
Transformation Of Organic Matter

Over the last two decades, viruses in aquatic systems have been observed to modify, influence and control aquatic systems. Since the determination decades ago that viruses were abundant in aquatic ecosystems, researchers have demonstrated that viruses are pervasive and dynamic across the expanse and depth of all aquatic systems as well as at the water-sediment interface. There have been a wide range of methodological advancements during this time. To date, aquatic viruses have been suggested to play vital roles in global and small-scale biogeochemical cycling, community structure, algal bloom termination, gene transfer, and evolution of aquatic organisms. Even in harsh and difficult to study environments, aquatic and benthic viruses have been demonstrated to be major players in carbon cycling and recycling of nutrients from organic material. Taxonomic and metagenomic research has shown us that there are major globally-distributed groups, but that their genomes are filled with sequence information that has no similarity to sequences in existing bioinformatic databases. And while the field of viral ecology has expanded exponentially since the late 1980s, there is much that we do not yet understand about virusmediated processes in aquatic systems. Important near-term steps include the combination of advanced metagenomic techniques with studies of function and population control, standardization of methodological approaches to facilitate global data acquisition without concern over methods-based artefacts, understanding of viral life strategies and their triggers, and the role of viruses in the transformation of organic matter. The purpose of this manuscript is to bring the reader a review of the recent advances in aquatic viral ecology in light of new areas of research, applications of viral ecology to real-world problems, and refinement of models of viral interactions on a range of scales.

Fish as Indicators of Ecological Sustainability: Historical Sequences in Toronto Area Streams

1994 ◽  
Vol 29 (4) ◽  
pp. 599-617 ◽  
Author(s):  
Gordon A. Wichert
Keyword(s):  
Water Quality ◽  
Fish Species ◽  
Urban Streams ◽  
Aquatic Systems ◽  
Ecological Sustainability ◽  
Tolerance Index ◽  
Ecological Conditions ◽  
Species Association ◽  
The Past ◽  
Historical Sequences

Abstract A weighted species association tolerance index with respect to water quality (WSATI-WQ) was crafted based on the literature on the sensitivity of different species to certain types of changes in their habitats. This index was used to compare changes through time in ecological conditions at locales in 12 subwatersheds in Toronto streams. As expected, WSATI-WQ scores were generally largest at relatively undisturbed sites and became progressively smaller with increasing deviation from an undisturbed state. Benefits from improved management of sewage have offset some of the degradation associated with earlier urbanization. It appears that modern urban stresses are less harmful to aquatic systems than were urban stresses of the past since some tolerant fish species presently live in urban streams where fish were absent 40 years ago.

scholarly journals Timescale Methods for Simplifying, Understanding and Modeling Biophysical and Water Quality Processes in Coastal Aquatic Ecosystems: A Review

Water ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2717 ◽  
Author(s):  
Lisa V. Lucas ◽  
Eric Deleersnijder
Keyword(s):  
Water Quality ◽  
Transit Time ◽  
Residence Time ◽  
Aquatic Ecosystems ◽  
Aquatic Systems ◽  
Algebraic Methods ◽  
Flushing Time ◽  
Coastal Systems ◽  
Continental Shelves ◽  
New Applications

In this article, we describe the use of diagnostic timescales as simple tools for illuminating how aquatic ecosystems work, with a focus on coastal systems such as estuaries, lagoons, tidal rivers, reefs, deltas, gulfs, and continental shelves. Intending this as a tutorial as well as a review, we discuss relevant fundamental concepts (e.g., Lagrangian and Eulerian perspectives and methods, parcels, particles, and tracers), and describe many of the most commonly used diagnostic timescales and definitions. Citing field-based, model-based, and simple algebraic methods, we describe how physical timescales (e.g., residence time, flushing time, age, transit time) and biogeochemical timescales (e.g., for growth, decay, uptake, turnover, or consumption) are estimated and implemented (sometimes together) to illuminate coupled physical-biogeochemical systems. Multiple application examples are then provided to demonstrate how timescales have proven useful in simplifying, understanding, and modeling complex coastal aquatic systems. We discuss timescales from the perspective of “holism”, the degree of process richness incorporated into them, and the value of clarity in defining timescales used and in describing how they were estimated. Our objective is to provide context, new applications and methodological ideas and, for those new to timescale methods, a starting place for implementing them in their own work.

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