Understanding effects of small dams on benthic metabolism and primary production in temperate forested streams

2020 ◽  
Vol 193 (3) ◽  
pp. 227-237
Author(s):  
John P. Ludlam ◽  
Allison H. Roy
Keyword(s):  
Nutrient Limitation ◽  
Ecosystem Processes ◽  
Nutrient Concentrations ◽  
Ecosystem Responses ◽  
Stream Ecosystem ◽  
Benthic Metabolism ◽  
Factors Associated ◽  
Physical Conditions ◽  
And Control ◽  
Func Tion

Dams can alter the chemical and physical conditions of downstream environments by increasing stream temperatures, altering nutrient limitation, reducing flow variability, and reducing fine sediment deposition. However, little is known about how fundamental stream ecosystem processes like productivity and respiration respond to dams. Nutrient diffusing substrates were installed in three dam streams and three control streams to evaluate the effect of dams on benthic gross primary productivity (GPP), respiration (R), and chlorophyll α production. Dam streams were an average of 5.6 °C warmer than control streams but GPP, R and chlorophyll α were not different between control and dam streams. Phosphorus enrichment increased heterotrophic R relative to controls (~1.8×) but not autotrophic GPP, R or chlorophyll α. Stream nutrient concentrations and nutrient limitation of heterotrophic R were similar in dam and control streams, suggesting that the dams had limited effects on nutrient transport downstream. Autotrophic GPP, R and chlorophyll α were limited by light and varied within and across streams, potentially masking our ability to detect differences caused solely by dams. Dams may alter stream ecosystem func- tion but consideration of other factors associated with and independent of dams is critical for predicting ecosystem responses to dams.

Risk factors associated with hypertension awareness, treatment, and control in a multi-ethnic Asian population

2009 ◽  
Vol 27 (1) ◽  
pp. 190-197 ◽  
Author(s):  
Yi Wu ◽  
E Shyong Tai ◽  
Derrick Heng ◽  
Chee Eng Tan ◽  
Lip Ping Low ◽  
...  
Keyword(s):  
Risk Factors ◽  
Asian Population ◽  
Factors Associated ◽  
Hypertension Awareness ◽  
And Control

scholarly journals Factors associated with prevalence, awareness, treatment and control of hypertension in urban adults from 33 communities in China: the CHPSNE Study

2011 ◽  
Vol 34 (10) ◽  
pp. 1087-1092 ◽  
Author(s):  
Shen Tian ◽  
Guang-Hui Dong ◽  
Da Wang ◽  
Miao-Miao Liu ◽  
Qiao Lin ◽  
...  
Keyword(s):  
Factors Associated ◽  
Urban Adults ◽  
And Control

scholarly journals Factors associated with the prevalence of hypertension and control practices among elderly residents of São Paulo city, Brazil

2013 ◽  
Vol 29 (11) ◽  
pp. 2275-2286 ◽  
Author(s):  
Telma de Almeida Busch Mendes ◽  
Moisés Goldbaum ◽  
Neuber José Segri ◽  
Marilisa Berti de Azevedo Barros ◽  
Chester Luiz Galvão César ◽  
...  
Keyword(s):  
Physical Activity ◽  
The Elderly ◽  
Multiple Regression Model ◽  
Sao Paulo ◽  
Lifestyle Changes ◽  
Cluster Sampling ◽  
São Paulo ◽  
Factors Associated ◽  
Diet And Physical Activity ◽  
And Control

The aim of this study was to analyze the prevalence of hypertension and control practices among the elderly. The survey analyzed data from 872 elderly people in São Paulo, Brazil, through a cluster sampling, stratified according to education and income. A Poisson multiple regression model checked for the existence of factors associated with hypertension. The prevalence of self-reported hypertension among the elderly was 46.9%. Variables associated with hypertension were self-rated health, alcohol consumption, gender, and hospitalization in the last year, regardless of age. The three most common measures taken to control hypertension, but only rarely, are oral medication, routine salt-free diet and physical activity. Lifestyle and socioeconomic status did not affect the practice of control, but knowledge about the importance of physical activity was higher among those older people with higher education and greater income. The research suggests that health policies that focus on primary care to encourage lifestyle changes among the elderly are necessary.

scholarly journals Hospital Readmission in Patients With COVID-19

2021 ◽  
Author(s):  
Neda Rahimian ◽  
Mahshid Heidari ◽  
Nahid Hashemi-Madani ◽  
Nader Tavakoli ◽  
Moammad E Khamseh
Keyword(s):  
Risk Factors ◽  
Hospital Readmission ◽  
Underlying Disease ◽  
Control Groups ◽  
Factors Associated ◽  
Infection Age ◽  
Discharge Plan ◽  
Matched Case ◽  
And Control ◽  
Control Study

Abstract Objective: During the COVID-19 pandemic, the demand for hospital beds has exceeded substantially. Thus, we aimed to conduct this study to identify factors associated with the risk of readmission in order to introduce the best discharge plan for patients with high risk of hospital readmission. Method: This is a multicenter, case-control study included 1357 patients hospitalized with COVID-19 infection. Age-sex-matched case and control groups were paired at 1:2 ratios. COVID-19 readmission rate was assessed. Moreover, Logistic regression analysis was applied to determine the factors associated with readmission. Results: Of the 1357 patients, 99 (7.29%) subjects were readmitted. The most common cause of readmission was respiratory distress. The median (IQR) of the interval between hospital discharge and the second admission was 5 (2-16) days. Upon adjusting with the main risk factors, having at least one underlying disease and being treated with the corticosteroid (GC) were significantly associated with a higher rate of readmission (OR: 2.76, 95% CI :1.30- 5.87) and (OR:8.24, 95% CI :3.72- 18.22), respectively.Conclusion: Identification of Risk factors of COVID 19 readmission will improve resource utilization and patient care.

scholarly journals Prevalence of and Factors Associated With Depressive Symptoms Among College Students in Wuhan, China During the Normalization Stage of COVID-19 Prevention and Control

2021 ◽  
Vol 12 ◽  
Author(s):  
Jincong Yu ◽  
Ziyun Yang ◽  
Yuqin Wu ◽  
Ming Ge ◽  
Xuemei Tang ◽  
...  
Keyword(s):  
College Students ◽  
Logistic Regression ◽  
Online Learning ◽  
Depressive Symptoms ◽  
Prevention And Control ◽  
Psychological Intervention ◽  
Binary Logistic Regression ◽  
Factors Associated ◽  
And Control ◽  
At Home

Objectives: The 2019 coronavirus disease (COVID-19) epidemic has led to persistent negative psychological effects on the general public, especially on college students, who are highly susceptible to psychological difficulties, such as fear, anxiety, and depression. Little information is known about depressive symptoms among college students during the normalization stage of COVID-19 prevention and control in China. This study aimed to understand the prevalence of and factors associated with depressive symptoms after a long quarantine time and online learning at home among college students in Wuhan, China.Materials and Methods: A web-based survey was conducted from July to August 2020 during the Chinese summer holiday to collect data on sociodemographic variables, depressive symptoms, and their potential associated factors using an electronic questionnaire among college students in Wuhan, China. The Patient Health Questionnaire-9 (PHQ-9) was used to measure depressive symptoms. Binary logistic regression was used to explore the factors associated with depressive symptoms.Results: A total of 9,383 college students were included in the analysis. The prevalence of depressive symptoms was 15.8% (1,486/9,383) among college students. The binary logistic regression showed that the experience of being quarantined for observation or treatment, family members or friends dying of COVID-19, rarely or never seeking help from others, fewer supportive relatives or friends, less support from family in the past month, a worse relationship with parents at home, a longer time spent daily on electronic devices except for online learning, and feeling anxious in the face of returning to school were independently associated with a higher risk of depressive symptoms. Academic stress and concern about the epidemic were the main reasons for their anxiety.Conclusions: Targeted psychological intervention measures are recommended for college students to improve their mental health during the normalization stage of COVID-19 prevention and control.

scholarly journals CON: COVID-19 will not result in increased antimicrobial resistance prevalence

2020 ◽  
Vol 2 (3) ◽  
Author(s):  
Peter Collignon ◽  
John J Beggs
Keyword(s):  
Antimicrobial Resistance ◽  
Infection Prevention ◽  
Developed Countries ◽  
International Travel ◽  
Infection Prevention And Control ◽  
Resistant Bacteria ◽  
Healthcare Facilities ◽  
Factors Associated ◽  
Resistance Rates ◽  
And Control

Abstract Antimicrobial resistance (AMR) is affected by many factors, but too much of our focus has been on antimicrobial usage. The major factor that drives resistance rates globally is spread. The COVID-19 pandemic should lead to improved infection prevention and control practices, both in healthcare facilities and the community. COVID-19 will also have ongoing and profound effects on local, national and international travel. All these factors should lead to a decrease in the spread of resistant bacteria. So overall, COVID-19 should lead to a fall in resistance rates seen in many countries. For this debate we show why, overall, COVID-19 will not result in increased AMR prevalence. But globally, changes in AMR rates will not be uniform. In wealthier and developed countries, resistance rates will likely decrease, but in many other countries there are already too many factors associated with poor controls on the spread of bacteria and viruses (e.g. poor water and sanitation, poor public health, corrupt government, inadequate housing, etc.). In these countries, if economies and governance deteriorate further, we might see even more transmission of resistant bacteria.

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