scholarly journals Extreme flow variability and the ‘boom and bust’ ecology of fish in arid-zone floodplain rivers: a case history with implications for environmental flows, conservation and management

Ecohydrology ◽  
2011 ◽  
Vol 4 (5) ◽  
pp. 708-720 ◽  
Author(s):  
Angela H. Arthington ◽  
Stephen R. Balcombe
Keyword(s):  
Case History ◽  
Environmental Flows ◽  
Arid Zone ◽  
Flow Variability ◽  
Boom And Bust ◽  
Floodplain Rivers ◽  
Conservation And Management ◽  
Extreme Flow

scholarly journals What evidence exists on the impacts of flow variability on fish and macroinvertebrates of temperate floodplain rivers in Central and Western Europe? A systematic map protocol

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Agata Keller ◽  
Somsubhra Chattopadhyay ◽  
Mikołaj Piniewski
Keyword(s):  
Climate Change ◽  
Western Europe ◽  
Climatic Variability ◽  
Grey Literature ◽  
Habitat Type ◽  
Water Diversion ◽  
Systematic Map ◽  
Eligibility Criteria ◽  
Flow Variability ◽  
Floodplain Rivers

Abstract Background Flow variability is considered a fundamental factor affecting riverine biota. Any alterations to flow regime can influence freshwater organisms, and this process is expected to change with the projected climate change. This systematic map, therefore, aims at investigating the impacts of natural (resulting from climatic variability), anthropogenic (resulting from direct human pressure), and climate change-induced flow variability on fish and macroinvertebrates of temperate floodplain rivers in Central and Western Europe. Particular focus will be placed on the effects of extreme low and high discharges. These rare events are known to regulate population size and taxonomic diversity. Methods All studies investigating the effects of flow variability on metrics concerning freshwater fish and macroinvertebrates will be considered in the map, particularly metrics such as: abundance, density, diversity, growth, migration, recruitment, reproduction, survival, or their substitutes, such as biomonitoring indices. Relevant flow variability will reflect (1) anthropogenic causes: dams, reservoirs, hydroelectric facilities, locks, levees, water abstraction, water diversion, land-use changes, road culverts; (2) natural causes: floods, droughts, seasonal changes; or (3) climate change. Geographically, the map will cover the ecoregion of Central and Western Europe, focusing on its major habitat type, namely “temperate floodplain rivers and wetlands”. The review will employ search engines and specialist websites, and cover primary and grey literature. No date, language, or document type restrictions will be applied in the search strategy. We expect the results to be primarily in English, although evidence (meeting all eligibility criteria) from other languages within the study area will also be included. We will also contact relevant stakeholders and announce an open call for additional information. Eligibility screening will be conducted at two levels: title and abstract, and full text. From eligible studies the following information will be extracted: the cause of flow variability, location, type of study, outcomes, etc. A searchable database containing extracted data will be developed and provided as supplementary material to the map report. The final narrative will describe the quantity and key characteristics of the available evidence, and identify knowledge gaps and knowledge clusters, i.e. subtopics sufficiently covered by existing studies allowing full systematic review and meta-analysis.

Zooplankton diversity and assemblages in arid zone rivers of the Lake Eyre Basin, Australia

2006 ◽  
Vol 57 (1) ◽  
pp. 49 ◽  
Author(s):  
Russell J. Shiel ◽  
Justin F. Costelloe ◽  
Julian R. W. Reid ◽  
Peter Hudson ◽  
Joan Powling
Keyword(s):  
Seasonal Changes ◽  
Arid Zone ◽  
Early Summer ◽  
Taxon Richness ◽  
Ecosystem Structure ◽  
Regression Analyses ◽  
Flood Events ◽  
Assemblage Composition ◽  
Boom And Bust ◽  
Three Rivers

The responses of zooplankton assemblages in arid zone rivers to seasonal changes, flow events, drying and water quality changes are fundamental to our understanding of these unregulated rivers. For three years the zooplankton and littoral microfauna in three rivers in the Lake Eyre Basin were studied. A diverse assemblage was discovered with a total of 398 identifiable taxa being recorded, consisting of 72 protist, 227 rotifer and 93 microcrustacean taxa. Zooplankton diversity was highest in a boom phase during, or in the summer following, a large flood. The rotifer assemblage dominated during, or soon after, periods of flow. However, during the winter and early summer, there was a decline in rotifer taxon richness and abundance accompanied by an increase in microcrustacean taxon richness and abundance. The winter samples occurred during the recession of a large flood and the early summer samples during periods of no flow. These changes suggested the involvement of a strong annual cycle of ecosystem structure evident within the longer term patterns of boom and bust driven by the timing and size of flood events. Multivariate and regression analyses found that salinity was a significant and independent driver of assemblage composition.

scholarly journals Advancing towards functional environmental flows for temperate floodplain rivers

2018 ◽  
Vol 633 ◽  
pp. 1089-1104 ◽  
Author(s):  
Daniel S. Hayes ◽  
Julia M. Brändle ◽  
Carina Seliger ◽  
Bernhard Zeiringer ◽  
Teresa Ferreira ◽  
...  
Keyword(s):  
Environmental Flows ◽  
Floodplain Rivers

Putting Science in its Place: The Role of Sandringham Station in Fostering Arid Zone Science in Australia

2014 ◽  
Vol 25 (2) ◽  
pp. 186 ◽  
Author(s):  
Christopher R. Dickman ◽  
Libby Robin
Keyword(s):  
Arid Zone ◽  
Scientific Work ◽  
Ephemeral Wetlands ◽  
The Past ◽  
Boom And Bust ◽  
Set Up ◽  
Ongoing Support ◽  
Scientific Questions ◽  
Simpson Desert

For the past fifty years, Sandringham Station has provided a major focus for scientific work in southwestern Queensland, an arid region that includes the Simpson Desert and the Channel Country (together 'Desert Channels'). This paper explores the role of place, chance and private enterprise in supporting science in this region. Unlike other parts of inland Australia, where government initiatives were prominent, science in Queensland's arid country was privately supported, and research there had an ecological or eco-physiological rather than an economic focus. It began later than elsewhere (1960s), and its scientific questions were different from those framed in research stations set up to address agricultural and pastoral imperatives. The location of Sandringham on the ecological edge between the ephemeral wetlands of the anastomosing channels and the dune country of the Simpson Desert created an ecotonal area that was rich in animals adapted to living in Australian desert country, and a particular opportunity to observe their adaptations to the boom-and-bust ecological conditions. The role of local observers, particularly station managers and naturalists, has been critical in studying the often cryptic animals of the region, and the ongoing support of the station itself was essential to investigations that were mostly on private leasehold lands.

Rodents of the arid Northern Territory: conservation status and distribution

2000 ◽  
Vol 27 (4) ◽  
pp. 437 ◽  
Author(s):  
Jeffry R. Cole ◽  
J. C. Z. Woinarski
Keyword(s):  
Nineteenth Century ◽  
Endemic Species ◽  
Native Species ◽  
Arid Zone ◽  
Conservation Status ◽  
Historical Record ◽  
Northern Territory ◽  
Management Actions ◽  
Threatening Processes ◽  
Conservation And Management

At the time of European entry, 18 species of rodent occurred in the arid zone of the Northern Territory, including two endemic species, Zyzomys pedunculatus and Pseudomys johnsoni. The tally is somewhat inflated, as the arid Northern Territory is on the margins of the distribution for seven of these species. The historical record for this fauna is generally reasonably good, due to important collections around the end of the nineteenth century, some landmark studies (notably by H.H. Finlayson) earlier this century, documentation of Aboriginal knowledge, and the recent discovery and analysis of fossil and sub-fossil deposits. Notwithstanding this good historical baseline, recent research has added three native species to the fauna, and re-discovered one species, Z. pedunculatus, earlier feared extinct. Over the last 200 years, four species (Leporillus apicalis, Notomys amplus, N. longicaudatus and Pseudomys fieldi) have disappeared, and a further five species (N. cervinus, N. fuscus, P. australis, Rattus tunneyi and Z. pedunculatus) have declined considerably, with several of these perhaps no longer present in the area. The decline in this rodent fauna is matched, or indeed surpassed, by declines in the arid-zone bandicoots, small macropods and large dasyurids. But notably the small dasyurids have generally suffered few declines. There has been differential decline within the rodent fauna, with declines mainly affecting larger species, species with the most idiosyncratic diets, and species occurring mainly in tussock grasslands and gibber plains. The main conservation and management actions required to safeguard what is left of this fauna are carefully targetted studies examining the effect of threatening processes, complemented by landscape-wide amelioration of these threats. Additional autecological studies are also needed for some species, and some exceptionally poorly known areas should be surveyed. Current work examining the distribution, ecology and management requirements of the endangered Z. pedunculatus is a major priority.

The desert dweller: forging a career in arid zone ecology

2018 ◽  
Vol 24 (3) ◽  
pp. 230
Author(s):  
K. E. Moseby
Keyword(s):  
Threatened Species ◽  
Arid Zone ◽  
Harsh Environments ◽  
Conservation Science ◽  
Remote Location ◽  
Extinction Rates ◽  
European Settlement ◽  
Boom And Bust

Australia’s deserts can appear to be desolate and harsh environments, but they are extremely dynamic places that support a range of species adapted to the boom and bust conditions. Despite the resilience of the arid zone, extinction rates in arid Australia are the highest in the country and the majority of medium-sized mammals have been lost since European settlement. Katherine Moseby is a conservation biologist who lives and works in the Australian arid zone, with a particular focus on threatened species and reintroductions. She provides a brief background on arid zone ecology in Australia and the story of how she went from city slicker to desert dweller. A discussion on what it means to be a woman in conservation science is included with some insights into juggling a career and a family in a remote location.

Misophonia: An Evidence-Based Case Report

2020 ◽  
Vol 29 (4) ◽  
pp. 685-690
Author(s):  
C. S. Vanaja ◽  
Miriam Soni Abigail
Keyword(s):  
Quality Of Life ◽  
Case Report ◽  
Case History ◽  
Pure Tone ◽  
Physiological Responses ◽  
Evidence Based ◽  
Management Option ◽  
Pure Tone Audiogram

Purpose Misophonia is a sound tolerance disorder condition in certain sounds that trigger intense emotional or physiological responses. While some persons may experience misophonia, a few patients suffer from misophonia. However, there is a dearth of literature on audiological assessment and management of persons with misophonia. The purpose of this report is to discuss the assessment of misophonia and highlight the management option that helped a patient with misophonia. Method A case study of a 26-year-old woman with the complaint of decreased tolerance to specific sounds affecting quality of life is reported. Audiological assessment differentiated misophonia from hyperacusis. Management included retraining counseling as well as desensitization and habituation therapy based on the principles described by P. J. Jastreboff and Jastreboff (2014). A misophonia questionnaire was administered at regular intervals to monitor the effectiveness of therapy. Results A detailed case history and audiological evaluations including pure-tone audiogram and Johnson Hyperacusis Index revealed the presence of misophonia. The patient benefitted from intervention, and the scores of the misophonia questionnaire indicated a decrease in the severity of the problem. Conclusions It is important to differentially diagnose misophonia and hyperacusis in persons with sound tolerance disorders. Retraining counseling as well as desensitization and habituation therapy can help patients who suffer from misophonia.

Counseling Parents at the Time of Diagnosis: Moving Toward Client-Centered Practice

2020 ◽  
pp. 1-5
Author(s):  
David Luterman
Keyword(s):  
Case History ◽  
Medical Model ◽  
Diagnostic Process ◽  
Separate Entity ◽  
Initial Examination ◽  
Personal Adjustment ◽  
Flow Of Information ◽  
Ultimate Purpose

Purpose The purpose of this article is to present a client-centered model of counseling that integrates information and personal adjustment counseling. Research has indicated that audiologists are more comfortable with counseling that is information based than with personal adjustment counseling. The prevailing model of diagnosis appears to be the medical model in which, first, a case history is taken, then testing and, finally, counseling. This model lends itself to audiologist as expert and the counseling as a separate entity based on information and advice. Further research has indicated parents retain little of the information provided in the initial examination because of their heightened emotions. This article presents a client-centered model of diagnosis in which information is provided within an emotionally safe context, enabling the parents to express their feelings and have the ability to control the flow of information. The ultimate purpose of a client-centered model is to empower parents by making them active participants in the diagnostic process rather than passive recipients. Conclusion The client-centered model has wide implications for the diagnostic process as well as for the training of students.

School-Based Speech-Language Pathologists' Adherence to Practice Guidelines for Assessment of English Learners

2020 ◽  
pp. 1-12
Author(s):  
Virginia L. Dubasik ◽  
Dubravka Svetina Valdivia
Keyword(s):  
Professional Practice ◽  
Practice Guidelines ◽  
Case History ◽  
English Learners ◽  
Online Survey ◽  
Dynamic Assessment ◽  
Federal Legislation ◽  
Assessment Practices ◽  
Speech Language Pathologists ◽  
School Based

Purpose The purpose of this study was to ascertain the extent to which school-based speech-language pathologists' (SLPs) assessment practices with individual English learners (ELs) align with federal legislation and professional practice guidelines. Specifically, we were interested in examining SLPs' use of multiple tools during individual EL assessments, as well as relationships between practices and number of types of training experiences. Method School-based SLPs in a Midwestern state were recruited in person or via e-mail to complete an online survey pertaining to assessment. Of the 562 respondents who completed the survey, 222 (39.5%) indicated past or present experience with ELs, and thus, their data were included in the analyses. The questionnaire solicited information about respondent's demographics, caseload composition, perceived knowledge and skills and training experiences pertaining to working with ELs (e.g., graduate school, self-teaching, professional conferences), and assessment practices used in schools. Results The majority of respondents reported using multiple tools rather than a single tool with each EL they assess. Case history and observation were tools used often or always by the largest number of participants. SLPs who used multiple tools reported using both direct (e.g., standardized tests, dynamic assessment) and indirect tools (e.g., case history, interviews). Analyses revealed low to moderate positive associations between tools, as well as the use of speech-language samples and number of types of training experiences. Conclusions School-based SLPs in the current study reported using EL assessment practices that comply with federal legislation and professional practice guidelines for EL assessment. These results enhance our understanding of school-based SLPs' assessment practices with ELs and may be indicative of a positive shift toward evidence-based practice.

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