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https://www.readbyqxmd.com/read/27912012/coast-wide-recruitment-dynamics-of-olympia-oysters-reveal-limited-synchrony-and-multiple-predictors-of-failure
#1
Kerstin Wasson, Brent B Hughes, John S Berriman, Andrew L Chang, Anna K Deck, Paul A Dinnel, Charlie Endris, Michael Espinoza, Sarah Dudas, Matthew C Ferner, Edwin D Grosholz, David Kimbro, Jennifer L Ruesink, Alan C Trimble, Dick Vander Schaaf, Chela J Zabin, Danielle C Zacherl
Recruitment of new propagules into a population can be a critical determinant of adult density. We examined recruitment dynamics in the Olympia oyster (Ostrea lurida), a species occurring almost entirely in estuaries. We investigated spatial scales of interannual synchrony across 37 sites in eight estuaries along 2,500 km of Pacific North American coastline, predicting that high vs. low recruitment years would coincide among neighboring estuaries due to shared exposure to regional oceanographic factors. Such synchrony in recruitment has been found for many marine species and some migratory estuarine species, but has never been examined across estuaries in a species that can complete its entire life cycle within the same estuary...
December 2016: Ecology
https://www.readbyqxmd.com/read/27911797/meeting-the-sustainable-development-goals-leads-to-lower-world-population-growth
#2
Guy J Abel, Bilal Barakat, Samir Kc, Wolfgang Lutz
Here we show the extent to which the expected world population growth could be lowered by successfully implementing the recently agreed-upon Sustainable Development Goals (SDGs). The SDGs include specific quantitative targets on mortality, reproductive health, and education for all girls by 2030, measures that will directly and indirectly affect future demographic trends. Based on a multidimensional model of population dynamics that stratifies national populations by age, sex, and level of education with educational fertility and mortality differentials, we translate these goals into SDG population scenarios, resulting in population sizes between 8...
November 29, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27907261/fitting-state-space-integral-projection-models-to-size-structured-time-series-data-to-estimate-unknown-parameters
#3
J Wilson White, Kerry J Nickols, Daniel Malone, Mark H Carr, Richard M Starr, Flora Cordoleani, Marissa L Baskett, Alan Hastings, Louis W Botsford
Integral projection models (IPMs) have a number of advantages over matrix-model approaches for analyzing size-structured population dynamics, because the latter require parameter estimates for each age or stage transition. However, IPMs still require appropriate data. Typically they are parameterized using individual-scale relationships between body size and demographic rates, but these are not always available. We present an alternative approach for estimating demographic parameters from time series of size-structured survey data using a Bayesian state-space IPM (SSIPM)...
December 2016: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/27907255/a-hyperspectral-image-can-predict-tropical-tree-growth-rates-in-single-species-stands
#4
T Trevor Caughlin, Sarah J Graves, Gregory P Asner, Michiel van Breugel, Jefferson S Hall, Roberta E Martin, Mark S Ashton, Stephanie A Bohlman
Remote sensing is increasingly needed to meet the critical demand for estimates of forest structure and composition at landscape to continental scales. Hyperspectral images can detect tree canopy properties, including species identity, leaf chemistry and disease. Tree growth rates are related to these measurable canopy properties but whether growth can be directly predicted from hyperspectral data remains unknown. We used a single hyperspectral image and light detection and ranging-derived elevation to predict growth rates for 20 tropical tree species planted in experimental plots...
December 2016: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/27907209/correction-climate-demography-and-zoogeography-predict-introgression-thresholds-in-salmonid-hybrid-zones-in-rocky-mountain-streams
#5
(no author information available yet)
[This corrects the article DOI: 10.1371/journal.pone.0163563.].
2016: PloS One
https://www.readbyqxmd.com/read/27903613/the-effect-of-an-extreme-and-prolonged-population-bottleneck-on-patterns-of-deleterious-variation-insights-from-the-greenlandic-inuit
#6
Casper-Emil T Pedersen, Kirk E Lohmueller, Niels Grarup, Peter Bjerregaard, Torben Hansen, Hans R Siegismund, Ida Moltke, Anders Albrechtsen
The genetic consequences of population bottlenecks on patterns of deleterious genetic variation in human populations are of tremendous interest. Based on exome sequencing of 18 Greenlandic Inuit here we show that the Inuit have undergone a severe ~20,000 year long bottleneck. This has led to a markedly more extreme distribution of allele frequencies than seen for any other human population, making the Inuit the perfect population for investigating the effect of a bottleneck on patterns of deleterious variation...
November 30, 2016: Genetics
https://www.readbyqxmd.com/read/27903482/systematic-review-and-meta-analysis-of-pre-operative-risk-factors-of-type-ii-endoleaks-after-endovascular-aneurysm-repair
#7
REVIEW
Florent Lalys, Vincent Durrmann, Aurélien Duménil, Cemil Göksu, Alain Cardon, Elodie Clochard, Antoine Lucas, Adrien Kaladji
PURPOSE: Type II endoleaks (T2Es) remain the Achilles heel of Endovascular Aneurysm Repair (EVAR), involving a close follow-up and sometimes leading to reintervention. Identifying risk factors impacting T2Es is of concern to improve decision-making and optimize follow-up. However, it has led to contradictory results, with supporting evidence for the majority of factors being weak. METHODS: A systematic review and meta-analysis was conducted to study risk factors of T2Es following EVAR to identify risk factors and measure their dedicated strength of association...
November 26, 2016: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/27901510/genetic-heterogeneity-underlying-variation-in-a-locally-adaptive-clinal-trait-in-pinus-sylvestris-revealed-by-a-bayesian-multipopulation-analysis
#8
S T Kujala, T Knürr, K Kärkkäinen, D B Neale, M J Sillanpää, O Savolainen
Local adaptation is a common feature of plant and animal populations. Adaptive phenotypic traits are genetically differentiated along environmental gradients, but the genetic basis of such adaptation is still poorly known. Genetic association studies of local adaptation combine data over populations. Correcting for population structure in these studies can be problematic since both selection and neutral demographic events can create similar allele frequency differences between populations. Correcting for demography with traditional methods may lead to eliminating some true associations...
November 30, 2016: Heredity
https://www.readbyqxmd.com/read/27900569/status-of-urban-populations-of-the-long-tailed-macaque-macaca-fascicularis-in-west-sumatra-indonesia
#9
Kurnia Ilham, Rizaldi, Jabang Nurdin, Yamato Tsuji
We studied long-tailed macaque (Macaca fascicularis) populations in Padang, West Sumatra, Indonesia, focusing on the effect of human provisioning on their demography and dietary composition. We conducted a field survey at three sites in the city: Gunung Meru, Gunung Padang, and Gunung Panggilun. Mean troop size (range 28-68) and infant ratio (range 0.38-1.00) were greater in Gunung Meru, where the macaques have been highly provisioned, than at the other two study sites (troop size 10-15; infant ratio 0.00-0...
November 29, 2016: Primates; Journal of Primatology
https://www.readbyqxmd.com/read/27899113/collapse-of-an-iconic-conifer-long-term-changes-in-the-demography-of-widdringtonia-cedarbergensis-using-repeat-photography
#10
J D M White, S L Jack, M T Hoffman, J Puttick, D Bonora, V Visser, E C February
BACKGROUND: Conifer populations appear disproportionately threatened by global change. Most examples are, however, drawn from the northern hemisphere and long-term rates of population decline are not well documented as historical data are often lacking. We use a large and long-term (1931-2013) repeat photography dataset together with environmental data and fire records to account for the decline of the critically endangered Widdringtonia cedarbergensis. Eighty-seven historical and repeat photo-pairs were analysed to establish 20th century changes in W...
November 30, 2016: BMC Ecology
https://www.readbyqxmd.com/read/27896783/post-clear-corneal-phacoemulsification-endophthalmitis-profile-and-management-outcomes-at-a-tertiary-eye-care-center-in-western-india
#11
Aditya S Kelkar, Jai A Kelkar, Prajakta M Barve, Aishwarya Mulay, Shubhangi Sharma, Winfried Amoaku
BACKGROUND: Infectious endophthalmitis is a serious sight threatening intraocular inflammation that results from exogenous or endogenous spread of organisms into the eye.A retrospective case series to study the profile of endophthalmitis following clear corneal phacoemulsification in western India between years 2008 and 2014 was held in the National Institute of Ophthalmology, Pune, India. Cases of endophthalmitis post-clear corneal phacoemulsification were reviewed pertaining to demography, clinical history, surgeon experience, surgical complications, time of onset following surgery, duration between onset of symptoms and presentation to the center, presenting visual acuity and at follow-ups, slit-lamp examination and ultrasound findings, vitreous tap culture results, treatment, and final functional and anatomical outcomes...
December 2016: Journal of Ophthalmic Inflammation and Infection
https://www.readbyqxmd.com/read/27893866/ecology-and-demography-of-free-roaming-domestic-dogs-in-rural-villages-near-serengeti-national-park-in-tanzania
#12
Anna M Czupryna, Joel S Brown, Machunde A Bigambo, Christopher J Whelan, Supriya D Mehta, Rachel M Santymire, Felix J Lankester, Lisa J Faust
Free-roaming dogs (Canis lupus familiaris) are of public health and conservation concern because of their potential to transmit diseases, such as rabies, to both people and wildlife. Understanding domestic dog population dynamics and how they could potentially be impacted by interventions, such as rabies vaccination, is vital for such disease control efforts. For four years, we measured demographic data on 2,649 free-roaming domestic dogs in four rural villages in Tanzania: two villages with and two without a rabies vaccination campaign...
2016: PloS One
https://www.readbyqxmd.com/read/27891142/genetic-structure-and-evolutionary-history-of-three-alpine-sclerophyllous-oaks-in-east-himalaya-hengduan-mountains-and-adjacent-regions
#13
Li Feng, Qi-Jian Zheng, Zeng-Qiang Qian, Jia Yang, Yan-Ping Zhang, Zhong-Hu Li, Gui-Fang Zhao
The East Himalaya-Hengduan Mountains (EH-HM) region has a high biodiversity and harbors numerous endemic alpine plants. This is probably the result of combined orographic and climate oscillations occurring since late Tertiary. Here, we determined the genetic structure and evolutionary history of alpine oak species (including Quercus spinosa, Quercus aquifolioides, and Quercus rehderiana) using both cytoplasmic-nuclear markers and ecological niche models (ENMs), and elucidated the impacts of climate oscillations and environmental heterogeneity on their population demography...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27889916/precipitation-alters-interactions-in-a-grassland-ecological-community
#14
Nicolas Deguines, Justin S Brashares, Laura R Prugh
1.Climate change is transforming precipitation regimes worldwide. Changes in precipitation regimes are known to have powerful effects on plant productivity, but the consequences of these shifts for the dynamics of ecological communities are poorly understood. This knowledge gap hinders our ability to anticipate and mitigate the impacts of climate change on biodiversity. 2.Precipitation may affect fauna through direct effects on physiology, behavior or demography, through plant-mediated indirect effects, or by modifying interactions among species...
November 27, 2016: Journal of Animal Ecology
https://www.readbyqxmd.com/read/27886726/what-fosters-concern-for-inequality-among-american-adolescents
#15
Erin A Cech
Understanding cultural beliefs about social and economic inequality is vital to discerning the roadblocks and pathways to addressing that inequality. The foundation of concern for inequality is laid during adolescence, yet scholars understand little about the factors that influence whether and how adolescents come to express such concern. Arguing that structural and cultural contexts are just as consequential as whether adolescents themselves are members of disadvantaged groups, I draw on four theoretical perspectives to identify factors that influence adolescents' concern for addressing inequality: the underdog thesis, intergroup contact theory, the education enlightens thesis, and ideological buttressing...
January 2017: Social Science Research
https://www.readbyqxmd.com/read/27884629/urgent-listing-exceptions-and-outcomes-in-pediatric-heart-transplantation-comparison-to-standard-criteria-patients
#16
Ryan R Davies, Michael A McCulloch, Shylah Haldeman, Samuel S Gidding, Christian Pizarro
BACKGROUND: United Network for Organ Sharing (UNOS) policy enables listing exceptions to avoid penalizing patients with waitlist mortality not captured by standard criteria. Outcomes among patients listed by exception have not been analyzed. METHODS: We performed a retrospective analysis of pediatric (≤17 years of age, n = 4,706) listings (2006 to 2015) for primary, isolated heart transplantation within the UNOS data set, assessing Status 1A exception (n = 211, 4...
October 1, 2016: Journal of Heart and Lung Transplantation
https://www.readbyqxmd.com/read/27882006/framingham-risk-score-in-impaired-glucose-tolerant-population-a-sub-analysis-of-diabetes-prevention-and-awareness-program-of-pakistan
#17
Asher Fawwad, Hassan Moin, Iftikhar Ahmed Siddiqui, Muhammad Zafar Iqbal Hydrie, Abdul Basit
OBJECTIVE: To assess the 10-year risk of coronary artery disease (CAD) in subjects with impaired glucose tolerance (IGT) using Framingham risk score. METHODS: Data for this study was collected from Diabetes Prevention and Awareness Program. Primary prevention team visited different primary health care centers, factories, service organizations and offices within Karachi, Pakistan. IGT was diagnosed according to World Health Organization criteria after taking informed consent...
September 2016: Pakistan Journal of Medical Sciences Quarterly
https://www.readbyqxmd.com/read/27874836/whole-genome-sequence-snp-chips-and-pedigree-structure-building-demographic-profiles-in-domestic-dog-breeds-to-optimize-genetic-trait-mapping
#18
Dayna L Dreger, Maud Rimbault, Brian W Davis, Adrienne Bhatnagar, Heidi G Parker, Elaine A Ostrander
In the decade following publication of the draft genome sequence of the domestic dog, extraordinary advances with application to several fields have been credited to the canine genetic system. Taking advantage of closed breeding populations and the subsequent selection for aesthetic and behavioral characteristics, researchers have leveraged the dog as an effective natural model for the study of complex traits, such as disease susceptibility, behavior, and morphology, generating unique contributions to human health and biology...
November 17, 2016: Disease Models & Mechanisms
https://www.readbyqxmd.com/read/27870031/top-down-limitation-of-lemmings-revealed-by-experimental-reduction-of-predators
#19
Dominique Fauteux, Gilles Gauthier, Dominique Berteaux
It is generally recognized that delayed density-dependence is responsible for cyclic population dynamics. However, it is still uncertain whether a single factor can explain why some rodent populations fluctuate according to a 3-4 yr periodicity. There is increasing evidence that predation may play a role in lemming population cycles, although this effect may vary seasonally. To address this issue, we conducted an experiment where we built a large exclosure (9 ha) to protect brown lemmings (Lemmus trimucronatus) from avian and terrestrial predators...
November 2016: Ecology
https://www.readbyqxmd.com/read/27870022/viability-of-cyclic-populations
#20
Alexander Singer, Karin Frank
Theory on viability of small populations is well developed and has led to the standard methodology of population viability analysis (PVA) to assess vulnerability of single species. However, more complex situations involving community dynamics or environmental change violate theoretical assumptions. Synthesizing concepts from population, community, and conservation ecology, we develop a generic theory on the viability of cyclic populations. The interplay of periodic population decline and demography causes varying risk patterns that aggregate during cycles and modify the temporal structure of viability...
November 2016: Ecology
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