Ecosystem consequences of potential range expansions ofOrconectes virilisandOrconectes rusticuscrayfish in Canada — a review

2009 ◽  
Vol 17 (NA) ◽  
pp. 235-248 ◽  
Author(s):  
Iain D. Phillips ◽  
Rolf D. Vinebrooke ◽  
Michael A. Turner
Keyword(s):  
Human Activities ◽  
Aquatic Ecosystems ◽  
Water Bodies ◽  
Potential Range ◽  
Orconectes Virilis ◽  
Resource Managers ◽  
Central Canada ◽  
Acidification Recovery ◽  
Benthic Ecosystems ◽  
Crayfish Species

Canadian water bodies are presently experiencing fluctuations in orconectid crayfish ranges largely as a result of human activities. The range of Orconectes virilis , Canada’s most widespread crayfish, is expanding westward into previously uninhabited water bodies of Alberta. This species is also set to re-colonize watersheds in the eastern extent of its range as post-acidification recovery of aquatic ecosystems continues. In addition, the non-native Orconectes rusticus has invaded Central Canada. This species has the potential to rapidly invade boreal water bodies and out-compete native congeners, including O. virilis. Both these crayfish species are known to affect benthic ecosystems and their invasions may have adverse consequences for Canadian water bodies if left unchecked. Here we review the current documented distribution of O. virilis and O. rusticus in Canada, and identify the potential impacts that their invasion may have on boreal aquatic ecosystems. Finally, we consider options that resource managers might consider to contend with these invasions.

scholarly journals Development of freshwater microalgae under exposure to atrazine and cadmium

2020 ◽  
Vol 3 (4) ◽  
pp. 299-306
Author(s):  
Văn Phát Lê ◽  
Minh Tân Võ ◽  
Nguyễn Hồng Sơn Lê ◽  
Ngân Hà Nguyễn ◽  
Phương Thảo Hoàng ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Growth Rate ◽  
Human Activities ◽  
Aquatic Environment ◽  
Metal Contamination ◽  
Aquatic Ecosystems ◽  
Water Bodies ◽  
Negative Effects ◽  
Freshwater Microalgae ◽  
Herbicide Atrazine

  During the latest decades, human activities have contributed a large number of pollutants such as heavy metals, herbicides into water bodies. These pollutants cause negative effects on the aquatic environment and organisms in aquatic ecosystems, including microalgae. This study aimed to evaluate the impacts of the herbicide atrazine and the metal Cd on development and growth rate of four freshwater microalgae, Scenedesmus quadricauda, Scenedesmus protuberans, Pediastrum duplex, and Pseudanabaena mucicola. We found that atrazine at the concentrations from 3–300 µg/L caused the reduction of development of S. quadricauda and P. mucicola. The growth rate of these two microalgae was inhibited upon exposure to 300 µg/L of atrazine. The Cd at the concentrations of 17–143 µg/L slightly influenced the development and growth rate of P. duplex. In contrast, the concentrations of 46–123 µg Cd/L, enhanced the development of S. protuberans between the 6th and 10th day of incubation. The development and growth rate of S. protuberans decreased exposed to 607 µg Cd/L. The current study evidenced the potent toxicity of atrazine to microalgae. Besides, the microalgae species P. duplex and S. protuberans showed their tolerance to Cd at the concentration up to 143 µg/L. Hence they would be potential candidates for phytoremediation in relation to metal contamination in water bodies.

On methodological approaches to the improvement of surface water bodies and target indicators of the natural waters’ quality

2021 ◽  
Vol 27 (1) ◽  
pp. 6-14
Author(s):  
V. Zaslonovsky ◽  
◽  
N. Sharapov ◽  
M. Bosov ◽  
◽  
...  
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Natural Water ◽  
Aquatic Ecosystems ◽  
Natural Waters ◽  
Water Bodies ◽  
Surface Water Bodies ◽  
Methodological Approaches ◽  
Natural Water Bodies

The paper is devoted to the development of proposals concerning the improvement of surface water bodies and the appointment of target indicators of the natural waters’ quality. The paper considers a variety of problems of preserving, restoring and improving the quality of natural surface waters: from regional features of the formation of natural water composition, to differences in the requirements for the quality of water consumed. The object of the study is the qualitative indicators of the waters of natural water bodies, and the subject of the study is the methodological approaches to the normalization of these indicators. The purpose of the work is to identify the main shortcomings in the domestic system of rationing the quality of natural waters, and to form appropriate proposals. For this purpose, the following tasks were set and solved: to review the methodological approaches to assessing and rationing the quality of natural waters used in some foreign countries and in the Russian Federation, to identify the main causes and shortcomings; to make proposals for improving the current system of water quality rationing. The result of this work is the conclusions about the lack of impact of the strategy operating in Russia in the development of schemes of complex use and protection of water objects, standards of permissible impact on water bodies, the appointment of permissible discharge limits in terms of maintaining and improving the water quality of natural water bodies. The reasons that led to this are indicated. The necessity of taking into account, in addition to the physical and chemical composition, also hydrobiological parameters is shown. It is concluded that instead of fisheries management standards, environmental standards should serve as the basis for target indicators of water quality of natural water bodies, which determine the well-being of humans and the stable functioning of aquatic ecosystems, taking into account regional factors. Proposals were made to adjust the methodological approaches to the implementation of this strategy. According to the authors, these proposals will speed up the solution of the main objectives of the strategy – the ecological improvement of water bodies, the preservation of unique aquatic ecosystems and the environmentally safe development of territories that previously experienced relatively small anthropogenic impacts (Eastern Siberia and the Far East)

scholarly journals Parameters lnfluencing Planning of District Level Towns in Bangladesh

2021 ◽  
pp. 77-86
Author(s):  
K. Nizamuddin
Keyword(s):  
Present State ◽  
Human Activities ◽  
Planning Process ◽  
District Level ◽  
Town Planning ◽  
Water Bodies ◽  
Actual State ◽  
The Future ◽  
The City

Town planning is a comprehensive task involving several stages that takes the city from actual state it is in to a desired state in the future through various measures taken by the concerned planning authorities. A city may be viewed as a system or a complex whole consisting of different component parts related or interacting with one another so as to form a unity. The component parts of the systenl consists of persistent human activities that have a tendency to occur or recur at specific locations that is, the activities occur within adopted spaces which include buildings, parks, water, bodies etc. The co~l~leclionasm ong these parts are communications which enable various activities to inter;ict so that necessary patterns of huinan behaviour can occur. These communications are recurrent and spatially clustered such as roads, railn~aysp, ipelines, cables etc. Implemelltation of the plan involves control of the various components of thissystenl so that the intended state as set out by the goals of the plan would depend on the existing state of the city. Therefore a thorough knowledge of the present state of the city is the first and an ilnportant step in any planning process.

New crayfish species records from the Sipsey Fork drainage, including Lewis Smith Reservoir (Alabama, USA): native or introduced species?

2015 ◽  
Vol 21 (1) ◽  
pp. 17-32
Author(s):  
Susan B. Adams ◽  
Craig Roghair ◽  
Colin Krause ◽  
Melvin L. Warren ◽  
J. Allison Cochran ◽  
...  
Keyword(s):  
Introduced Species ◽  
Native Species ◽  
River System ◽  
Orconectes Virilis ◽  
Transition Zones ◽  
Intestinal Contents ◽  
Black Bass ◽  
Community Changes ◽  
Black Warrior River ◽  
Crayfish Species

Abstract As part of a study of aquatic faunal community changes along riverine-lacustrine transition zones upstream of Lewis Smith Reservoir in northwest Alabama, USA, we collected crayfish from 60 sites in the Sipsey Fork, Brushy Creek, and selected tributaries (Black Warrior River system). After finding two unexpected and possibly-introduced crayfish species, we expanded our investigation of crayfish distributions to include crayfish obtained from stomachs of black bass (Micropterus spp.) caught at seven sites in the reservoir. To explore what crayfish species were in the drainage historically, we examined museum databases as well as stomach and intestinal contents of a variety of preserved fishes that were caught in the Sipsey Fork and Brushy Creek drainages upstream of the reservoir in the early 1990’s. Of the seven crayfish species collected, one, Orconectes (Procericambarus) sp. nr ronaldi, was not previously reported from Alabama, and another, O. lancifer, was not reported from the Black Warrior River system prior to the study. Three are known or possibly introduced species. Upstream of the reservoir, the native species Cambarus obstipus, C. striatus, and O. validus were common. The same three species were found in fish collected in the 1990’s. Orconectes perfectus was found only in the reservoir but may be native to the drainage. Orconectes lancifer was in the reservoir and in stream reaches influenced by the reservoir. Evidence points to O. lancifer being introduced in the drainage, but this is uncertain. Orconectes sp. nr ronaldi was found in a relatively small portion of Brushy Creek and its tributaries, in both flowing and impounded habitats, and may be introduced. Orconectes virilis is introduced in Alabama and was found only in stomachs of fish collected in the reservoir.

scholarly journals An exposure-effect approach for evaluating ecosystem-wide risks from human activities

2015 ◽  
Vol 72 (3) ◽  
pp. 1105-1115 ◽  
Author(s):  
Antony M. Knights ◽  
Gerjan J. Piet ◽  
Ruud H. Jongbloed ◽  
Jacqueline E. Tamis ◽  
Lydia White ◽  
...  
Keyword(s):  
Human Activities ◽  
Ecological Impact ◽  
Sustainable Use ◽  
Ecosystem Recovery ◽  
Exposure Effect ◽  
Resource Managers ◽  
Recovery Times ◽  
Time Required ◽  
Time Frames

Abstract Ecosystem-based management (EBM) is promoted as the solution for sustainable use. An ecosystem-wide assessment methodology is therefore required. In this paper, we present an approach to assess the risk to ecosystem components from human activities common to marine and coastal ecosystems. We build on: (i) a linkage framework that describes how human activities can impact the ecosystem through pressures, and (ii) a qualitative expert judgement assessment of impact chains describing the exposure and sensitivity of ecological components to those activities. Using case study examples applied at European regional sea scale, we evaluate the risk of an adverse ecological impact from current human activities to a suite of ecological components and, once impacted, the time required for recovery to pre-impact conditions should those activities subside. Grouping impact chains by sectors, pressure type, or ecological components enabled impact risks and recovery times to be identified, supporting resource managers in their efforts to prioritize threats for management, identify most at-risk components, and generate time frames for ecosystem recovery.

Bioindication role of higher plants in the diagnostics of aquatic ecosystems: Case study of small water bodies in St. Petersburg

2007 ◽  
Vol 34 (6) ◽  
pp. 718-724 ◽  
Author(s):  
V. V. Kurilenko ◽  
N. G. Osmolovskaya
Keyword(s):  
Aquatic Ecosystems ◽  
Higher Plants ◽  
Water Bodies ◽  
Small Water ◽  
Small Water Bodies

scholarly journals Analysis Of Reed Resource Dynamics In Water Bodies Of Eastern Latvia

2015 ◽  
Vol 1 ◽  
pp. 252
Author(s):  
E. Čubars ◽  
G. Noviks
Keyword(s):  
Shallow Lakes ◽  
Water Body ◽  
Human Activities ◽  
Hydrological Regime ◽  
Climatic Conditions ◽  
Water Bodies ◽  
Natural Processes ◽  
Resource Dynamics ◽  
Main Factors ◽  
Made In

The paper shows the results obtained during the research of reed dynamics revealing that in Eastern Latvia 20 lakes and pisciculture farms are potentially important for the reed extraction. In 2008, the reed resources there covered a territory of approximately 2300 ha. The ortophoto images of potentially important water bodies made in 1997, 2005 and 2008 were analyzed using the computer program ArcMap. The reed growth develops differently in every water body, but in general the eutrophication of water bodies and the enlargement of reed-covered areas can be observed. The most rapidly the reed occupies new territories in pisciculture farms and shallow lakes. The analysis of reed resource dynamics show that reed-covered areas in this region are expanding every year. The main factors that influence the distribution of reed growths refer to human activities, climatic conditions, hydrological regime in water bodies and natural processes of eutrophication.

scholarly journals Impact of Human Activities on Biodiversity in Nigerian Aquatic Ecosystems

2016 ◽  
Vol 4 (1) ◽  
pp. 12-20 ◽  
Author(s):  
Blessing Julius Oribhabor
Keyword(s):  
Human Activities ◽  
Aquatic Ecosystems

scholarly journals Load of Aeromonas salmonicida in Swamp Water and it's Effect on Tilapia (Oreochromis mossambicus)

1970 ◽  
Vol 15 ◽  
pp. 165-168 ◽  
Author(s):  
Habiba Khatun ◽  
Rowshatul Afza ◽  
M Iqbal Hossain ◽  
M Afzal Hussain ◽  
AR Khan ◽  
...  
Keyword(s):  
Organic Matter ◽  
Shallow Water ◽  
Aquatic Ecosystems ◽  
Oreochromis Mossambicus ◽  
Aeromonas Salmonicida ◽  
Water Bodies ◽  
Fish Culture ◽  
Unemployment Problem ◽  
Lentic Water

Swamps are one of those types of lentic water bodies, which form links between terrestrial and aquatic ecosystems. Dehadrai and Tripathi (1976) have characterized these water bodies as waterlogged, shallow water areas with a loose peaty bottom, rich in decaying organic matter retaining water either periodically or shrinking or drying summer months. There are numerous water bodies, including swamps, present in Bangladesh. But all of these water bodies are not used for scientific fish culture. To meet the increasing protein demand and to solve the unemployment problem in Bangladesh, swamps should be used for fish culture scientifically. This may also be helpful to destroy the habitat of many biological vectors such as mosquitoes. doi: 10.3329/jbs.v15i0.2158 J. bio-sci. 15: 165-168, 2007

scholarly journals Small Water Body Detection and Water Quality Variations with Changing Human Activity Intensity in Wuhan

2022 ◽  
Vol 14 (1) ◽  
pp. 200
Author(s):  
Lingjun Wang ◽  
Wanjuan Bie ◽  
Haocheng Li ◽  
Tanghong Liao ◽  
Xingxing Ding ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Water Quality ◽  
Water Body ◽  
Human Activities ◽  
Water Bodies ◽  
Small Water ◽  
Small Water Body ◽  
Water Indices ◽  
Small Water Bodies

Small water bodies ranging in size from 1 to 50,000 m2, are numerous, widely distributed, and have various functions in water storage, agriculture, and fisheries. Small water bodies used for agriculture and fisheries are economically significant in China, hence it is important to properly identify and analyze them. In remote sensing technology, water body identification based on band analysis, image classification, and water indices are often designed for large, homogenous water bodies. Traditional water indices are often less accurate for small water bodies, which often contain submerged or floating plants or easily confused with hill shade. Water quality inversion commonly depends on establishing the relationship between the concentration of water constituents and the observed spectral reflectance. However, individual variation in water quality in small water bodies is enormous and often far beyond the range of existing water quality inversion models. In this study, we propose a method for small water body identification and water quality estimation and test its applicability in Wuhan. The kappa coefficient of small water body identification is over 0.95, and the coefficient of determination of the water quality inversion model is over 0.9. Our results show that the method proposed in this study can be employed to accurately monitor the dynamics of small water bodies. Due to the outbreak of the COVID-19 pandemic, the intensity of human activities decreased. As a response, significant changes in the water quality of small water bodies were observed. The results also suggest that the water quality of small water bodies under different production modes (intensive/casual) respond differently in spatial and temporal dimensions to the decrease in human activities. These results illustrate that effective remote sensing monitoring of small water bodies can provide valuable information on water quality.

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