keyword
MENU ▼
Read by QxMD icon Read
search

Ecological theory

keyword
https://www.readbyqxmd.com/read/28319653/the-ecology-of-human-microbiota-dynamics-and-diversity-in-health-and-disease
#1
Antti Karkman, Jenni Lehtimäki, Lasse Ruokolainen
Social welfare, better health care, and urbanization have greatly improved human health and well-being. On the other hand, Western societies suffer from the downsides of the elevated standard of living. Among other factors, the Western diet (poor in dietary fiber), lack of contact with natural biodiversity, and excessive antibiotic use are known to be associated with the increase in chronic inflammatory disorders. Limited exposure to microbial biodiversity, in combination with severe lifestyle-related disturbances to commensal microbial communities, especially during early life, is changing the diversity and composition of human microbiota...
March 20, 2017: Annals of the New York Academy of Sciences
https://www.readbyqxmd.com/read/28316893/contrasting-determinants-for-the-introduction-and-establishment-success-of-exotic-birds-in-taiwan-using-decision-trees-models
#2
Shih-Hsiung Liang, Bruno Andreas Walther, Bao-Sen Shieh
BACKGROUND: Biological invasions have become a major threat to biodiversity, and identifying determinants underlying success at different stages of the invasion process is essential for both prevention management and testing ecological theories. To investigate variables associated with different stages of the invasion process in a local region such as Taiwan, potential problems using traditional parametric analyses include too many variables of different data types (nominal, ordinal, and interval) and a relatively small data set with too many missing values...
2017: PeerJ
https://www.readbyqxmd.com/read/28315417/higher-bmi-is-associated-with-stronger-effects-of-social-cues-on-everyday-snacking-behaviour
#3
Benjamin Schüz, Sarah Revell, Andrew P Hills, Natalie Schüz, Stuart G Ferguson
Discretionary food choices (snacks) contribute up to a third of the daily energy intake and potentially contribute to energy imbalance and weight gain. Individual snack intake behaviour is guided by internal and external cues, with social cues (seeing others eat, being alone) consistently showing large effects. A wide body of (mainly laboratory-based) research suggests marked differences in people's response to eating cues based on BMI. Here, we show that these BMI differences in cue responsiveness also pertain to everyday snacking behaviour...
March 15, 2017: Appetite
https://www.readbyqxmd.com/read/28303253/design-implementation-and-study-protocol-of-a-kindergarten-based-health-promotion-intervention
#4
Susanne Kobel, Olivia Wartha, Tamara Wirt, Jens Dreyhaupt, Christine Lämmle, Eva-Maria Friedemann, Anne Kelso, Claire Kutzner, Lina Hermeling, Jürgen M Steinacker
Inactivity and an unhealthy diet amongst others have led to an increased prevalence of overweight and obesity even in young children. Since most health behaviours develop during childhood health promotion has to start early. The setting kindergarten has been shown as ideal for such interventions. "Join the Healthy Boat" is a kindergarten-based health promotion programme with a cluster-randomised study focussing on increased physical activity, reduced screen media use, and sugar-sweetened beverages, as well as a higher fruit and vegetable intake...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28301480/management-and-modeling-approaches-for-controlling-raccoon-rabies-the-road-to-elimination
#5
REVIEW
Stacey A Elmore, Richard B Chipman, Dennis Slate, Kathryn P Huyvaert, Kurt C VerCauteren, Amy T Gilbert
Rabies is an ancient viral disease that significantly impacts human and animal health throughout the world. In the developing parts of the world, dog bites represent the highest risk of rabies infection to people, livestock, and other animals. However, in North America, where several rabies virus variants currently circulate in wildlife, human contact with the raccoon rabies variant leads to the highest per capita population administration of post-exposure prophylaxis (PEP) annually. Previous rabies variant elimination in raccoons (Canada), foxes (Europe), and dogs and coyotes (United States) demonstrates that elimination of the raccoon variant from the eastern US is feasible, given an understanding of rabies control costs and benefits and the availability of proper tools...
March 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28298346/population-structure-reduces-benefits-from-partner-choice-in-mutualistic-symbiosis
#6
Erol Akçay
Mutualistic symbioses are key drivers of evolutionary and ecological processes. Understanding how different species can evolve to interact in mutually beneficial ways is an important goal of evolutionary theory, especially when the benefits require costly investments by the partners. For such costly investments to evolve, some sort of fitness feedback mechanism must exist that more than recoups the direct costs. Several such feedback mechanisms have been explored both theoretically and empirically, yet we know relatively little of how they might act together, as they probably do in nature...
March 15, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28295769/hill-robertson-interference-maintained-by-red-queen-dynamics-favours-the-evolution-of-sex
#7
Jack da Silva, James D Galbraith
Although it is well established theoretically that selective interference among mutations (Hill-Robertson interference) favours meiotic recombination, genome-wide mean rates of mutation and strengths of selection appear too low to support this as the mechanism favouring recombination in nature. A possible solution to this discrepancy between theory and observation is that selection is at least intermittently very strong due to the antagonistic coevolution between a host and its parasites. The Red Queen theory posits that such coevolution generates fitness epistasis among loci, which generates negative linkage disequilibrium among beneficial mutations, which in turn favours recombination...
March 15, 2017: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/28290127/jumping-the-gun-faster-response-latencies-to-deceptive-questions-in-a-realistic-scenario
#8
Tessa Mapala, Lara Warmelink, Sally A Linkenauger
Most theories of lie detection assume that lying increases cognitive load, resulting in longer response latencies during questioning. However, the studies supporting this theory are typically laboratory-based, in settings with no specific validity in security contexts. Consequently, using virtual reality (VR), we investigated how response latencies were influenced in an ecologically valid environment of interest to security professionals. In a highly realistic airport security terminal presented in VR, a security officer asked participants yes/no questions about their belongings...
March 13, 2017: Psychonomic Bulletin & Review
https://www.readbyqxmd.com/read/28289263/fast-killing-parasites-can-be-favoured-in-spatially-structured-populations
#9
Helen C Leggett, Geoff Wild, Stuart A West, Angus Buckling
It is becoming increasingly clear that the evolution of infectious disease is influenced by host population structure. Theory predicts that parasites should be more 'prudent'-less transmissible-in spatially structured host populations. However, here we (i) highlight how low transmission, the phenotype being selected for in this in context, may also be achieved by rapacious host exploitation, if fast host exploitation confers a local, within-host competitive advantage and (ii) test this novel concept in a bacteria-virus system...
May 5, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/28289261/growth-rate-transmission-mode-and-virulence-in-human-pathogens
#10
Helen C Leggett, Charlie K Cornwallis, Angus Buckling, Stuart A West
The harm that pathogens cause to hosts during infection, termed virulence, varies across species from negligible to a high likelihood of rapid death. Classic theory for the evolution of virulence is based on a trade-off between pathogen growth, transmission and host survival, which predicts that higher within-host growth causes increased transmission and higher virulence. However, using data from 61 human pathogens, we found the opposite correlation to the expected positive correlation between pathogen growth rate and virulence...
May 5, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/28289257/host-allometry-influences-the-evolution-of-parasite-host-generalism-theory-and-meta-analysis
#11
Josephine G Walker, Amy Hurford, Jo Cable, Amy R Ellison, Stephen J Price, Clayton E Cressler
Parasites vary widely in the diversity of hosts they infect: some parasite species are specialists-infecting just a single host species, while others are generalists, capable of infecting many. Understanding the factors that drive parasite host-generalism is of basic biological interest, but also directly relevant to predicting disease emergence in new host species, identifying parasites that are likely to have unidentified additional hosts, and assessing transmission risk. Here, we use mathematical models to investigate how variation in host body size and environmental temperature affect the evolution of parasite host-generalism...
May 5, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/28285464/shodagor-family-strategies-balancing-work-and-family-on-the-water
#12
Kathrine E Starkweather
The Shodagor of Matlab, Bangladesh, are a seminomadic community of people who live and work on small wooden boats, within the extensive system of rivers and canals that traverse the country. This unique ecology places particular constraints on family and economic life and leads to Shodagor parents employing one of four distinct strategies to balance childcare and provisioning needs. The purpose of this paper is to understand the conditions that lead a family to choose one strategy over another by testing predictions about socioecological factors that impact the sexual division of labor, including a family's stage in the domestic cycle, aspects of the local ecology, and the availability of alloparents...
March 11, 2017: Human Nature: An Interdisciplinary Biosocial Perspective
https://www.readbyqxmd.com/read/28284795/coordinating-associative-and-ecological-accounts-of-learning-in-the-garden-snail-cornu-aspersum
#13
I Loy, B Álvarez, E C Strempler-Rubio, M Rodríguez
Pavlovian conditioning of tentacle lowering in the snail, Cornu aspersum, as an instance of associative learning, has proven effective to show evidence of paradigmatic associative phenomena (e.g., blocking) explained by current models of conditioning. Nevertheless, the available literature questions the biological function of the conditioned response (i.e., tentacle lowering) in snails since no advantages in terms of food finding had been observed. Ecological accounts of learning claim that learning abilities contribute to the adaptation to the environmental demands, and there is experimental evidence supporting this reported in several species (e...
March 8, 2017: Behavioural Processes
https://www.readbyqxmd.com/read/28284146/how-do-i-look-self-focused-attention-during-a-video-chat-of-women-with-social-anxiety-disorder
#14
Noortje Vriends, Yasemin Meral, Javier A Bargas-Avila, Christina Stadler, Susan M Bögels
We investigated the role of self-focused attention (SFA) in social anxiety (disorder) in an ecologically valid way. In Experiment 1 high (n = 26) versus low (n = 25) socially anxious single women between 18 and 30 years had a video ("Skype") conversation with an attractive male confederate, while seeing themselves and the confederate on-screen. The conversation was divided in four phases: (I) warm-up, (II) positive (confederate was friendly to the participant), (III) critical (confederate was critical to the participant), and (IV) active (participant was instructed to ask questions to the confederate)...
March 3, 2017: Behaviour Research and Therapy
https://www.readbyqxmd.com/read/28280990/parenting-strategies-in-modern-and-emerging-economies-introduction-to-the-special-issue
#15
Kermyt G Anderson, Kathrine E Starkweather
Independent of ecology, subsistence strategy, social complexity, or other aspects of socioecology, the altricial nature of young humans requires mothers to have help raising their offspring. What seems to be context-dependent, however, is who the helpers are, how they invest, and what the impacts of that investment are. In a series of papers that focus on parental and alloparental investment across five populations, this special issue of Human Nature uses evolutionary theory to examine how socioecological context influences modes of direct parental investment among the boat-dwelling Shodagor of Bangladesh (Starkweather), modes of indirect paternal investment in the modern United States (Anderson), and the biological outcome of paternal investment for men in Jamaica (Gray et al...
March 9, 2017: Human Nature: An Interdisciplinary Biosocial Perspective
https://www.readbyqxmd.com/read/28280578/why-are-we-not-evaluating-multiple-competing-hypotheses-in-ecology-and-evolution
#16
REVIEW
Gustavo S Betini, Tal Avgar, John M Fryxell
The use of multiple working hypotheses to gain strong inference is widely promoted as a means to enhance the effectiveness of scientific investigation. Only 21 of 100 randomly selected studies from the ecological and evolutionary literature tested more than one hypothesis and only eight tested more than two hypotheses. The surprising rarity of application of multiple working hypotheses suggests that this gap between theory and practice might reflect some fundamental issues. Here, we identify several intellectual and practical barriers that discourage us from using multiple hypotheses in our scientific investigation...
January 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/28279937/can-nutrient-pathways-and-biotic-interactions-control-eutrophication-in-riverine-ecosystems-evidence-from-a-model-driven-mesocosm-experiment
#17
Christoph G Jäger, Jeske Hagemann, Dietrich Borchardt
Ecological theory predicts that the relative importance of benthic to planktonic primary production usually changes along the rivers' continuum from a predomination of benthic algae in lower stream orders to a predomination of planktonic algae at higher orders. Underlying mechanisms driving the interaction between algae in these habitats, its controlling factors and consequences for riverine ecosystems are, however, only partly understood. We present a mechanistic analysis of the governing ecological processes using a simplified, numerical model and examine how abiotic factors and biotic interactions influence benthic and planktonic algae by changing resource competition...
February 27, 2017: Water Research
https://www.readbyqxmd.com/read/28276925/a-qualitative-analysis-of-multi-level-barriers-to-hiv-testing-among-women-in-lebanon
#18
Kirsty A Clark, Danya E Keene, John E Pachankis, Omar Fattal, Nesrine Rizk, Kaveh Khoshnood
While the number of HIV cases in the Middle East and North Africa region is low compared to other regions, recent studies show that incidence is increasing especially among high-risk populations; in particular, little is known about women and HIV in the region. Through semi-structured interviews with sexual healthcare providers and staff at non-governmental organisations, we sought to understand barriers to HIV testing among women in Lebanon. Using snowball sampling, key informants were recruited from greater Beirut (12 physicians, 9 non-governmental organisation staff)...
February 13, 2017: Culture, Health & Sexuality
https://www.readbyqxmd.com/read/28276582/ecological-factors-in-human-development
#19
William E Cross
Urie Bronfenbrenner (1992) helped developmental psychologists comprehend and define "context" as a rich, thick multidimensional construct. His ecological systems theory consists of five layers, and within each layer are developmental processes unique to each layer. The four articles in this section limit the exploration of context to the three innermost systems: the individual plus micro- and macrolayers. Rather than examine both the physical features and processes, the articles tend to focus solely on processes associated with a niche...
March 9, 2017: Child Development
https://www.readbyqxmd.com/read/28274856/mathematical-modeling-of-an-urban-pigeon-population-subject-to-local-management-strategies
#20
I Haidar, I Alvarez, A C Prévot
This paper addresses the issue of managing urban pigeon population using some possible actions that make it reach a density target with respect to socio-ecological constraints. A mathematical model describing the dynamic of this population is introduced. This model incorporates the effect of some regulatory actions on the dynamic of this population. We use mathematical viability theory, which provides a framework to study compatibility between dynamics and state constraints. The viability study shows when and how it is possible to regulate the pigeon population with respect to the constraints...
March 6, 2017: Mathematical Biosciences
keyword
keyword
76528
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"