Occurrence of the Eastern Hellbender (Cryptobranchus Alleganiensis Alleganiensis) in the Coosawattee River System (Mobile River Basin), Georgia

The Mekong River, well known for its aquatic biodiversity, is important to the social, physical, and economic health of millions living in China, Myanmar, Laos, Thailand, Cambodia, and Vietnam. This paper explores the social and environmental impacts of several Mekong basin hydropower dams and groupings of dams and the geographies of their impacts. Specifically, we examined the 3S (Sesan, Sekong Srepok) river system in northeastern Cambodia, the Central Highlands of Vietnam, and southern Laos; the Khone Falls area in southern Laos; the lower Mun River Basin in northeastern Thailand; and the upper Mekong River in Yunnan Province, China, northeastern Myanmar, northern Laos, and northern Thailand. Evidence shows that these dams and groupings of dams are affecting fish migrations, river hydrology, and sediment transfers. Such changes are negatively impacting riparian communities up to 1000 km away. Because many communities depend on the river and its resources for their food and livelihood, changes to the river have impacted, and will continue to negatively impact, food and economic security. While social and environmental impact assessments have been carried out for these projects, greater consideration of the scale and cumulative impacts of dams is necessary.

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Impacts of urbanization on river system structure: a case study on Qinhuai River Basin, Yangtze River Delta

Water Science & Technology ◽

10.2166/wst.2014.278 ◽

2014 ◽

Vol 70 (4) ◽

pp. 671-677 ◽

Cited By ~ 10

Author(s):

Xiaomin Ji ◽

Youpeng Xu ◽

Longfei Han ◽

Liu Yang

Keyword(s):

River Basin ◽

River System ◽

Yangtze River Delta ◽

System Structure ◽

River Channels ◽

Stream Structure ◽

Impervious Area ◽

The Status ◽

Urbanized Areas ◽

Qinhuai River

Stream structure is usually dominated by various human activities over a short term. An analysis of variation in stream structure from 1979 to 2009 in the Qinhuai River Basin, China, was performed based on remote sensing images and topographic maps by using ArcGIS. A series of river parameters derived from river geomorphology are listed to describe the status of river structure in the past and present. Results showed that urbanization caused a huge increase in the impervious area. The number of rivers in the study area has decreased and length of rivers has shortened. Over the 30 years, there was a 41.03% decrease in river length. Complexity and stability of streams have also changed and consequently the storage capacities of river channels in intensively urbanized areas are much lower than in moderately urbanized areas, indicating a greater risk of floods. Therefore, more attention should be paid to the urban disturbance to rivers.

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Using environmental DNA and occupancy modelling to identify drivers of eastern hellbender (Cryptobranchus alleganiensis alleganiensis) extirpation

Freshwater Biology ◽

10.1111/fwb.13210 ◽

2018 ◽

Vol 64 (1) ◽

pp. 208-221 ◽

Cited By ~ 7

Author(s):

Sean M. Wineland ◽

Shane M. Welch ◽

Thomas K. Pauley ◽

Joseph J. Apodaca ◽

Max Olszack ◽

...

Keyword(s):

Environmental Dna ◽

Occupancy Modelling ◽

Cryptobranchus Alleganiensis ◽

Eastern Hellbender

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A dynamic water accounting framework based on marginal resource opportunity cost

Hydrology and Earth System Sciences ◽

10.5194/hess-19-1457-2015 ◽

2015 ◽

Vol 19 (3) ◽

pp. 1457-1467 ◽

Cited By ~ 10

Author(s):

A. Tilmant ◽

G. Marques ◽

Y. Mohamed

Keyword(s):

River Basin ◽

Value Chain ◽

Economic Value ◽

River System ◽

River Basins ◽

Management Decision ◽

Water Fluxes ◽

Management Actions ◽

Water Users ◽

Water Accounting

Abstract. Many river basins throughout the world are increasingly under pressure as water demands keep rising due to population growth, industrialization, urbanization and rising living standards. In the past, the typical answer to meet those demands focused on the supply side and involved the construction of hydraulic infrastructures to capture more water from surface water bodies and from aquifers. As river basins have become more and more developed, downstream water users and ecosystems have become increasingly dependent on the management actions taken by upstream users. The increased interconnectedness between water users, aquatic ecosystems and the built environment is further compounded by climate change and its impact on the water cycle. Those pressures mean that it has become increasingly important to measure and account for changes in water fluxes and their corresponding economic value as they progress throughout the river system. Such basin water accounting should provide policy makers with important information regarding the relative contribution of each water user, infrastructure and management decision to the overall economic value of the river basin. This paper presents a dynamic water accounting approach whereby the entire river basin is considered as a value chain with multiple services including production and storage. Water users and reservoir operators are considered as economic agents who can exchange water with their hydraulic neighbors at a price corresponding to the marginal value of water. Effective water accounting is made possible by keeping track of all water fluxes and their corresponding hypothetical transactions using the results of a hydro-economic model. The proposed approach is illustrated with the Eastern Nile River basin in Africa.

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Microglanis cottoides (Boulenger, 1891) (Siluriformes: Pseudopimelodidae): distribution extension to Salí-Dulce River basin, northwestern Argentina

Check List ◽

10.15560/9.2.443 ◽

2013 ◽

Vol 9 (2) ◽

pp. 443

Author(s):

Luis Fernández ◽

Gladys Gonzo

Keyword(s):

River Basin ◽

Geographic Distribution ◽

Drainage System ◽

River System ◽

Northwestern Argentina

Microglanis cottoides (Boulenger 1891) is a known Paraná-Plata River basin catfish. Its geographic distribution is herein extended to a new drainage system, the Salí-Dulce River system, northwestern Argentina, which is a separate drainage from the Paraná-Plata basin.

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Evaluation of acute toxicity of zinc, lead and cadmium to zooplanktonic community in upper Berach river system, Rajasthan, India

South Asian Journal of Experimental Biology ◽

10.38150/sajeb.2(1).p20-26 ◽

2012 ◽

Vol 2 (1) ◽

pp. 20-26

Author(s):

Nadim Chishty ◽

Anil Tripathi ◽

Madhusudan Sharma

Keyword(s):

Heavy Metal ◽

Acute Toxicity ◽

Fresh Water ◽

River Basin ◽

Laboratory Experiments ◽

River System ◽

Daphnia Lumholtzi ◽

Lead And Cadmium ◽

Sensitivity Pattern ◽

Static Bioassay

Current study investigated through static bioassay, the acute toxicity of Zinc,Lead and Cadmium to fresh water zooplankters in the upper Berach riversystem which is a part of Gangetic river system. The river basin stretchesfrom Madar tank to Sarjana tank with a total length of 46 Km, including ninewater bodies i.e. Bada madar tank (73Â‹36Âf0ÂfÂfE and 24Â‹38Âf0ÂhN ), Chhotamadar tank, Fateh sagar lake, Udaisagar lake, UpÂ]stream pond (BichhdiÂ]I),DownÂ]stream pond(BichhdiÂ]II), Gadwa, Daroli and Sarjana tank (73Â‹ 57Âf10ÂhEand 24Â‹14Âf30Âh N). Whole zooplanktonic communities were exposed to different heavy metal stresses. Exposed zooplanktonic community included nine planktonic forms i.e. Heliodiaptomus viduus, Mesocyclops hyalinus, Heterocypris, Daphnia lumholtzi, Moina, Brachionus, Monostyla, Filinia. Cadmium was found to be most toxic and Zinc was least toxic to zooplankton. Ostracods and Cyclops were resistant forms and rotifers were sensitive forms in relation to metallic exposure. Sensitivity pattern observed during laboratory experiments was found to be in accordance with biodiversity variation of zooplankton in different ponds of Berach river system.

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Asserting the Depleting Groundwater Condition in Coastal Region and Its Relation to River System by Using Remote Sensing and GIS: A Case Study of Rushikulya River Basin, Odisha, India

Journal of the Indian Society of Remote Sensing ◽

10.1007/s12524-021-01456-w ◽

2021 ◽

Author(s):

Nirasindhu Desinayak ◽

Gyan Prakash Satyam ◽

Suren Nayak ◽

Rahul Kumar Singh ◽

Sridevi Jadav ◽

...

Keyword(s):

Remote Sensing ◽

River Basin ◽

Coastal Region ◽

River System ◽

Remote Sensing And Gis ◽

Groundwater Condition ◽

Rushikulya River

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Within-river straying: sex and size influence recovery location of hatchery Chinook salmon (Oncorhynchus tshawytscha)

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/cjfas-2018-0384 ◽

2020 ◽

Vol 77 (2) ◽

pp. 226-235 ◽

Cited By ~ 1

Author(s):

Amanda M.M. Pollock ◽

Maryam Kamran ◽

Andrew H. Dittman ◽

Marc A. Johnson ◽

David L.G. Noakes

Keyword(s):

River Basin ◽

Chinook Salmon ◽

Oncorhynchus Tshawytscha ◽

Classification Tree ◽

River System ◽

Classification Tree Analysis ◽

Spawning Grounds ◽

Natural Origin ◽

Elk River ◽

In The Wild

Salmon straying is often defined as the failure of adults to return to their natal river system. However, straying within a river basin can be problematic if hatchery salmon do not return to their hatchery of origin and subsequently spawn in the wild with natural-origin salmon. We examined within-river straying patterns from 34 years of coded-wire tag data, representing 29 941 hatchery fall Chinook salmon (Oncorhynchus tshawytscha) in the Elk River, Oregon, USA. Using classification tree analysis, we found that females and larger salmon were more likely to be recovered on the spawning grounds than males and smaller fish. Females larger than 980 mm had a 51.6% likelihood of recovery on the spawning grounds rather than at the Elk River Hatchery. Our findings raise questions about the behavior of straying adults and implications for management of these stocks, with a focus on methods to reduce within-river straying. We recommend further studies to determine whether carcass recoveries are fully representative of hatchery salmon that stray within the Elk River basin.

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