scholarly journals Decades needed for ecosystem components to respond to a sharp and drastic phosphorus load reduction

Hydrobiologia ◽  
2020 ◽  
Vol 847 (21) ◽  
pp. 4621-4651 ◽  
Author(s):  
Ingrid Chorus ◽  
Antje Köhler ◽  
Camilla Beulker ◽  
Jutta Fastner ◽  
Klaus van de Weyer ◽  
...  
Keyword(s):  
Phytoplankton Biomass ◽  
Extreme Case ◽  
Future Research ◽  
Load Reduction ◽  
Phosphorus Load ◽  
Internal Load ◽  
Lake Volume ◽  
Flushing Rates ◽  
Sediment Bottom ◽  
Meta Analyses

AbstractLake Tegel is an extreme case of restoration: inflow treatment reduced its main external phosphorus (TP) load 40-fold, sharply focused in time, and low-P water flushed the lake volume ≈ 4 times per year. We analysed 35 years of data for the time TP concentrations took to decline from ≈ 700 to 20–30 µg/l, biota to respond and cyanobacteria to become negligible. The internal load proved of minor relevance. After 10 years, TP reached 35–40 µg/l, phytoplankton biomass abruptly declined by 50% and cyanobacteria no longer dominated; yet 10 years later at TP < 20–30 µg/l they were below quantifiable levels. 20–25 years after load reduction, the lake was stably mesotrophic, macrophytes had returned down to 6–8 m, and vivianite now forms, binding P insolubly in the sediment. Bottom-up control of phytoplankton through TP proved decisive. Five intermittent years with a higher external P load caused some ‘re-eutrophication’, delaying recovery by 5 years. While some restoration responses required undercutting thresholds, particularly that of phytoplankton biomass to TP, resilience and hysteresis proved irrelevant. Future research needs to focus on the littoral zone, and for predicting time spans for recovery more generally, meta-analyses should address P load reduction in combination with flushing rates.

Strategy and current status of combating eutrophication in two Berlin lakes for safeguarding drinking water resources

2006 ◽  
Vol 54 (11-12) ◽  
pp. 93-100 ◽  
Author(s):  
I. Schauser ◽  
I. Chorus ◽  
B. Heinzmann
Keyword(s):  
External Load ◽  
Threshold Value ◽  
Phosphorus Limitation ◽  
Current Status ◽  
Phosphorus Concentration ◽  
Load Reduction ◽  
Phosphorus Load ◽  
Internal Load ◽  
Drinking Water Resources ◽  
External Phosphorus Load

After reduction of the external phosphorus load by phosphorus elimination plants, Lake Tegel and Schlachtensee in Berlin underwent a significant trophic improvement. The phosphorus elimination plants work by precipitation/coagulation/flocculation – sedimentation – post precipitation – filtration. The external load was reduced by one to two orders of magnitude down to 10–20 μg P L−1.The inlake phosphorus concentration followed. The development of algae and cyanobacteria was reduced substantially below a threshold value of about 50 μg P L−1, clearly due to phosphorus limitation. In Lake Tegel, the external load reduction of the main inflow was counteracted partially by the external load of the second main inflow by the River Havel and the internal load. This has to be managed further in future.

Physical and Psychological Benefits of Written Emotional Expression

2015 ◽  
Vol 20 (4) ◽  
pp. 242-251 ◽  
Author(s):  
Éva Kállay
Keyword(s):  
Mental Health ◽  
Expressive Writing ◽  
Mental Health Problems ◽  
Cost Effective ◽  
Health Problems ◽  
Future Research ◽  
Psychological Benefits ◽  
Cost Effective Treatment ◽  
Meta Analyses

Abstract. The last several decades have witnessed a substantial increase in the number of individuals suffering from both diagnosable and subsyndromal mental health problems. Consequently, the development of cost-effective treatment methods, accessible to large populations suffering from different forms of mental health problems, became imperative. A very promising intervention is the method of expressive writing (EW), which may be used in both clinically diagnosable cases and subthreshold symptomatology. This method, in which people express their feelings and thoughts related to stressful situations in writing, has been found to improve participants’ long-term psychological, physiological, behavioral, and social functioning. Based on a thorough analysis and synthesis of the published literature (also including most recent meta-analyses), the present paper presents the expressive writing method, its short- and long-term, intra-and interpersonal effects, different situations and conditions in which it has been proven to be effective, the most important mechanisms implied in the process of recovery, advantages, disadvantages, and possible pitfalls of the method, as well as variants of the original technique and future research directions.

Sport-Related and Psychosocial Factors Associated With Motives and Consequences Of Alcohol and Cannabis Use Among NCAA Athletes: A Systematic Review

2021 ◽  
Author(s):  
Callon M Williams ◽  
Michael T Shaw ◽  
Nadine R Mastroleo ◽  
Emily L Zale
Keyword(s):  
Sensation Seeking ◽  
Positive Reinforcement ◽  
National Collegiate Athletic Association ◽  
Cannabis Use ◽  
Drinking Motives ◽  
Future Research ◽  
Reference List ◽  
Psychosocial Correlates ◽  
Ncaa Athletes ◽  
Meta Analyses

Abstract Aims To review differences in alcohol- and cannabis-related motives and consequences among National Collegiate Athletic Association (NCAA) athletes as a function of athlete characteristics (e.g. gender and competition season status). Methods Procedures followed the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. PubMed, PsycINFO and manual reference list review were used to identify studies that reported alcohol- or cannabis-related motives and consequences among NCAA athletes as a function of gender, race, season status, division level or sport-type through December 2019. Relevant findings and any reported psychosocial correlates were extracted by two independent reviewers. Results The majority of studies (K = 15) focused on alcohol-related motives or consequences, with one examining cannabis-related motives, and no studies examined cannabis-related consequences. Social drinking motives were strongest among men and White NCAA athletes, and athlete-specific motives were most salient for men and in-season athletes. Cannabis use motives for positive reinforcement (e.g. enhancement) and coping were also strongest during the in-season. Negative alcohol-related consequences were greatest among men, athletes of color and out-of-season athletes, although women and in-season athletes experienced more consequences in athletic performance. Our exploratory aim revealed two studies that examined psychosocial correlates, and the results indicate that sensation-seeking, stress and negative affect were associated with more alcohol-related consequences. Conclusion NCAA athletes are a heterogenous population, and their motives and consequences of use appear to vary across multiple athlete factors (e.g., gender). This review highlights the gaps in the literature and suggests future research directions to identify the risk and protective factors for substance use among NCAA athletes.

scholarly journals Hypnotherapy for Procedural Pain and Distress in Children: A scoping Review Protocol

Pain Medicine ◽  
2021 ◽  
Author(s):  
Daly Geagea ◽  
Zephanie Tyack ◽  
Roy Kimble ◽  
Lars Eriksson ◽  
Vince Polito ◽  
...  
Keyword(s):  
Scoping Review ◽  
Grey Literature ◽  
Cochrane Library ◽  
Procedural Pain ◽  
Future Research ◽  
Theoretical Frameworks ◽  
Eligibility Criteria ◽  
Pharmacological Agents ◽  
Review Protocol ◽  
Meta Analyses

Abstract Objective Inadequately treated pain and distress elicited by medical procedures can put children at higher risks of acute and chronic biopsychosocial sequelae. Children can benefit from hypnotherapy, a psychological tailored intervention, as an adjunct to pharmacological agents to address the multiple components of pain and distress. Despite providing evidence on the effectiveness and potential superiority of hypnotherapy to other psychological interventions, research on hypnotherapy for paediatric procedural pain and distress has been predominantly limited to oncology and needle procedures. Plus, there is a lack of reporting of intervention manuals, factors influencing hypnotic responding, pain unpleasantness outcomes, theoretical frameworks, adverse events, as well as barriers and facilitators to the feasibility of delivering the intervention and study procedures. The proposed review aims to map the range and nature of the evidence on hypnotherapy for procedural pain and distress in children to identify gaps in literature and areas requiring further investigation. Methods This review will follow the Arksey and O'Malley (2005) methodology and incorporate additional scoping review recommendations by The Joanna Briggs Institute and Preferred Reporting Items for Systematic reviews and Meta-Analyses. Relevant studies will be identified through searching published literature databases (PubMed, Cochrane Library, PsycINFO, Embase, CINAHL, Scopus and Web of Science) and grey literature in addition to hand-searching of reference lists and key journals. Two authors will independently screen titles and abstracts of search results followed by full-texts review against eligibility criteria. Conclusion Findings are anticipated to guide future research and inform the development of tailored hypnotic interventions in children.

Tourism research for the GCC region: Current status and future research directions

2021 ◽  
pp. 135481662199996
Author(s):  
Ali Salman Saleh ◽  
Charbel Bassil ◽  
Arsalan Safari
Keyword(s):  
United Arab Emirates ◽  
Current Status ◽  
Future Research ◽  
Research Directions ◽  
Regional Tourism ◽  
Research Theme ◽  
Tourism Sector ◽  
Future Research Directions ◽  
Meta Analyses ◽  
The Impact

Tourism in the Gulf Cooperation Council (GCC) countries has recently been considered by policymakers as a new avenue for economic diversification. Despite the considerable literature concerning the impact of tourism worldwide, only a limited number of studies have looked at the tourism sector in the GCC region or analyzed its economic, sociocultural, and environmental impacts. This article therefore conducts a systematic review of the state of the literature related to tourism in the GCC region. It provides effective insights about the current status, gaps, and challenges and proposes future research directions in this area for academics, practitioners, and policymakers with an interest in regional tourism development. The preferred reporting items for systematic reviews and meta-analyses approach was used to identify and select the papers. Some 23 papers were identified and analyzed. The majority of these studies focused on the United Arab Emirates, specifically the Dubai emirate. We found the most dominant research theme to be tourism planning.

scholarly journals Future research avenues to facilitate social connectedness and safe collective behavior at organized crowd events

2021 ◽  
Vol 24 (2) ◽  
pp. 216-222
Author(s):  
Anne Templeton
Keyword(s):  
Social Connectedness ◽  
Extreme Case ◽  
Group Processes ◽  
Future Research ◽  
Collective Behaviors ◽  
Accurate Perception ◽  
Working Together ◽  
Future Research Directions ◽  
Crowd Psychology ◽  
Perception Of Health

During the COVID-19 pandemic, organizers of crowd events must facilitate physical distancing in environments where attendees previously enjoyed being close with ingroup members, encourage accurate perception of health risks and close adherence to safety guidance, and stop expected normative behaviors that may now be unsafe. Research from crowd psychology demonstrates how group processes are integral to each of these issues. The COVID-19 pandemic, however, has created an extreme case environment in which to evaluate the collective findings from previous research and identify future research directions. This paper outlines how organizers of crowd events and researchers can work together to further develop our understanding of social connectedness in crowds, reasons for risk-taking behavior, and level of engagement in new collective behaviors. By working together to address these issues, practitioners and researchers can develop our understanding of crowd processes and improve safety at future crowd events.

scholarly journals Tics in patients with encephalitis

2021 ◽  
Author(s):  
James Badenoch ◽  
Tamara Searle ◽  
Iona Watson ◽  
Andrea E. Cavanna
Keyword(s):  
Movement Disorders ◽  
Future Research ◽  
Viral Pathogens ◽  
Encephalitis Lethargica ◽  
Scientific Databases ◽  
Aspartate Receptor ◽  
Immune Mediated ◽  
Jakob Disease ◽  
Meta Analyses ◽  
Practical Implications

Abstract Background Movement disorders have been described in the context of different types of encephalitis. Among hyperkinetic manifestations, tics have sporadically been reported in cases of encephalitis resulting from a range of aetiologies. Objective This review aimed to assess the prevalence and characteristics of tics in patients with encephalitis. Methods We conducted a systematic literature review of original studies on the major scientific databases, according to the standards outlined in the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. Results In addition to the established association between tics and encephalitis lethargica, our literature search identified reports of tics in patients with immune-mediated pathologies (including autoimmune encephalitides affecting the N-methyl-d-aspartate receptor, voltage-gated potassium channels, and glycine receptors) and infective processes (ranging from relatively common viral pathogens, such as herpes simplex, to prions, as in Creutzfeldt-Jakob disease). Tics were most commonly reported in the post-encephalitic period and involvement of the basal ganglia was frequently observed. Discussion The association of new-onset tics and encephalitis, in the background of other neuropsychiatric abnormalities, has practical implications, potentially improving the detection of encephalitis based on clinical features. Future research should focus on the categorisation and treatment of hyperkinetic movement disorders associated with encephalitis.

A Systematic Review of Meta-Analyses in Special Education: Exploring the Evidence Base for High-Leverage Practices

2021 ◽  
pp. 074193252110634
Author(s):  
Gena Nelson ◽  
Sara Cothren Cook ◽  
Kary Zarate ◽  
Sarah R. Powell ◽  
Daniel M. Maggin ◽  
...  
Keyword(s):  
Systematic Review ◽  
Special Education ◽  
Students With Disabilities ◽  
Special Education Teachers ◽  
Evidence Base ◽  
Future Research ◽  
Evidence Based Practices ◽  
Intensive Instruction ◽  
Disability Categories ◽  
Meta Analyses

It is crucial that special education teachers are equipped with the knowledge and skills necessary to improve outcomes for students with disabilities. Despite federal legislation and efforts of the field to identify and disseminate evidence-based practices for students with disabilities, it is uncertain whether all special education teachers provide instruction based on the best available research. To better prepare special education teachers, McLeskey et al. proposed 22 high-leverage practices (HLPs). We conducted this systematic review of meta-analyses to provide an initial investigation of the experimental evidence reporting on the effectiveness of the HLPs for students with, or at risk for, a disability. Results indicated the largest amount of evidence from meta-analyses related to intensive instruction, explicit instruction, and social skills, with few meta-analyses reporting on collaboration and assessment. The results highlighted disproportional evidence according to disability categories. Implications for future research, practice, and teacher education are discussed.

Development of a novel harness system to aid in rehabilitation of horses

2019 ◽  
Vol 15 (5) ◽  
pp. 385-391
Author(s):  
S.L. Steinke ◽  
L.J. Belgrave ◽  
J.B. Montgomery
Keyword(s):  
High Pressure ◽  
High Strength ◽  
Future Research ◽  
Load Reduction ◽  
High Moisture ◽  
Anatomical Structures ◽  
High Pressure High Temperature ◽  
Abnormal Posture ◽  
Weight Compensation

Development of a rehabilitation harness to aid in recovery from musculoskeletal injuries is needed because serious complications can arise from long-term use of rescue slings. This study’s objective was to determine the anatomical structures of the horse that can bear significant weight, the potential complications that could arise if a horse is not properly supported by the harness and the % weight compensation achievable with the newly developed harness when used together with a dynamic rehabilitation lift. This dynamic lift can reduce the load the limbs carry, either withers-to-pelvis or left-to-right when used in combination with the rehabilitation harness under development. The rehabilitation harness prototype described here was made of cotton/nylon with sheepskin inserts, forming a blanket with high-strength strapping supporting the load-bearing structures of the horse. This prototype was load tested up to 600 kg, for safety, with no sign of failure. In an adult horse, the harness allowed for 40% load reduction from both front (125 of 303 kg [60% of 506 kg]) and hind (80 of 203 kg [40% of 506 kg]) legs before complications (abnormal posture) occurred. Pressure was measured to determine areas of high pressure which lead to the addition of an H-frame and a figure-eight pattern of strapping to the forelimb support reducing pressure, improving posture and achieving greater load reduction (46% [140 of 301.2 kg]). Abnormalities in respiratory rate or pattern were not observed. Future research will include testing the harness longer term (up to six weeks) with the incorporation of an air-pressurised breastplate to detect high-pressure, high-temperature, high-moisture areas, modifying the design further for improved horse-comfort reducing the risk of complications and enabling long-term use of the harness during rehabilitation.

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