scholarly journals Impact of Jetty Configuration Changes on the Hydrodynamics of the Subtropical Patos Lagoon Estuary, Brazil

Water ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 3197
Author(s):  
Maria Helena Paulo António ◽  
Elisa H. Fernandes ◽  
Jose H Muelbert
Keyword(s):  
Saltwater Intrusion ◽  
Environmental Changes ◽  
Management Strategies ◽  
Sediment Retention ◽  
Estuarine Ecosystem ◽  
Patos Lagoon ◽  
Access Channel ◽  
Before And After ◽  
Mouth Width ◽  
Current Reduction

Coastal infrastructure alterations, such as jetty expansions, are designed to provide improvements to natural dredging and safety of marine access and to maximize the management and efficiency of ports. Furthermore, these alterations have the potential to cause significant environmental changes to estuaries and adjacent coastal areas. Here, the hydrodynamics of Pathos Lagoon was investigated before and after the jetty alterations, where the jetty was increased by approximately 10–18% and the mouth width was reduced by 15%. The TELEMAC-3D numerical model was calibrated and validated using the field data, and then simulated for characteristic low and high extreme discharge years for the old and new jetty configurations. Results showed a flow reduction of approximately 20% both in the ebb and flood conditions in the new configuration, which was accompanied by a slight change in the propagation angle of the western jetty current. Reduction of the saltwater intrusion was registered during both the high and low discharge conditions with the new jetty configuration. During the high discharge periods with NE winds, saltwater intrusion did not reach the previous estuarine inland boundary. During the period of low discharge with SW wind, salinity did not reach further than 180 km inland. Reduced saltwater intrusion was estimated landwards and in the shallow embayments. The horizontal stratification structure of the salinity changed, with the partial centralization of the flow in the access channel. The observed hydrodynamic changes from the infrastructure modifications could affect the estuarine ecosystem by increasing the sediment retention, reducing the transport of marine organisms and water properties into the estuary. This study contributes not only to the understanding of hydrodynamic changes but also to the potential optimization of estuarine and coastal management strategies.

An Assessment of Environmental Changes in Three Lakes from King's County (Nova Scotia, Canada) Using Diatom-Based Paleolimnological Techniques

2008 ◽  
Vol 43 (2-3) ◽  
pp. 85-98 ◽  
Author(s):  
Joshua R. Thienpont ◽  
Brian K. Ginn ◽  
Brian F. Cumming ◽  
John P. Smol
Keyword(s):  
Nova Scotia ◽  
Environmental Changes ◽  
Sediment Cores ◽  
Lake Management ◽  
River System ◽  
210Pb Dating ◽  
Hydroelectric Power ◽  
Diatom Assemblages ◽  
Shoreline Development ◽  
Before And After

Abstract Paleolimnological approaches using sedimentary diatom assemblages were used to assess water quality changes over the last approximately 200 years in three lakes from King's County, Nova Scotia. In particular, the role of recent shoreline development in accelerating eutrophication in these systems was assessed. Sediment cores collected from each lake were analyzed for their diatom assemblages at approximately 5-year intervals, as determined by 210Pb dating. Analyses showed that each system has changed, but tracked different ecosystem changes. Tupper and George lakes recorded shifts, which are likely primarily related to climatic warming, with diatom assemblages changing from a preindustrial dominance by Aulacoseira spp. to present-day dominance by Cyclotella stelligera. In addition to the recent climatic-related changes, further diatom changes in the Tupper Lake core between approximately 1820 and 1970 were coincident with watershed disturbances (farming, forestry, and construction of hydroelectric power infrastructure). Black River Lake has recorded an increase in diatom-inferred total phosphorus since about 1950, likely due to impoundment of the Black River system for hydroelectric generation and subsequent changes in land runoff. Before-and-after (i.e., top-bottom) sediment analyses of six other lakes from King's County provided further evidence that the region is being influenced by climatic change (decreases in Aulacoseira spp., increases in planktonic diatom taxa), as well as showing other environmental stressors (e.g., acidification). However, we recorded no marked increase in diatom-inferred nutrient levels coincident with shoreline cottage development in any of the nine study lakes. Paleolimnological studies such as these allow lake managers to place the current limnological conditions into a long-term context, and thereby provide important background data for effective lake management.

scholarly journals Spatiotemporal variation in the fecal microbiota of mule deer is associated with proximate and future measures of host health

2021 ◽  
Vol 17 (1) ◽  
Author(s):  
Hyrum S. Eddington ◽  
Courtney Carroll ◽  
Randy T. Larsen ◽  
Brock R. McMillan ◽  
John M. Chaston
Keyword(s):  
Health Outcomes ◽  
Marker Gene ◽  
Management Strategies ◽  
Mule Deer ◽  
Winter Season ◽  
Fecal Microbiota ◽  
Food Sources ◽  
Nutrient Metabolism ◽  
Protein Levels ◽  
Before And After

Abstract Background Mule deer rely on fat and protein stored prior to the winter season as an energy source during the winter months when other food sources are sparse. Since associated microorganisms (‘microbiota’) play a significant role in nutrient metabolism of their hosts, we predicted that variation in the microbiota might be associated with nutrient storage and overwintering in mule deer populations. To test this hypothesis we performed a 16S rRNA marker gene survey of fecal samples from two deer populations in the western United States before and after onset of winter. Results PERMANOVA analysis revealed the deer microbiota varied interactively with geography and season. Further, using metadata collected at the time of sampling, we were able to identify different fecal bacterial taxa that could potentially act as bioindicators of mule deer health outcomes. First, we identified the abundance of Collinsella (family: Coriobacteriaceae) reads as a possible predictor of poor overwintering outcomes for deer herds in multiple locations. Second, we showed that reads assigned to the Bacteroides and Mollicutes Order RF39 were both positively correlated with deer protein levels, leading to the idea that these sequences might be useful in predicting mule deer protein storage. Conclusions These analyses confirm that variation in the microbiota is associated with season-dependent health outcomes in mule deer, which may have useful implications for herd management strategies.

scholarly journals Hazardous Drinking among Students over a Decade of University Policy Change: Controlled Before-and-After Evaluation

2018 ◽  
Vol 15 (10) ◽  
pp. 2137 ◽  
Author(s):  
Kypros Kypri ◽  
Brett Maclennan ◽  
Kimberly Cousins ◽  
Jennie Connor
Keyword(s):  
Environmental Changes ◽  
Population Policy ◽  
Code Of Conduct ◽  
Alcohol Policy ◽  
Absolute Difference ◽  
Effect Estimate ◽  
Policy Reforms ◽  
Student Body ◽  
University Policy ◽  
Before And After

Background: Responding to high levels of alcohol-related harm among students, a New Zealand university deployed a security and liaison service, strengthened the Student Code of Conduct, increased its input on the operation of alcohol outlets near campus, and banned alcohol advertising on campus. We estimated the change in the prevalence of alcohol consumption patterns among students at the university compared with other universities. Methods: We conducted a controlled before-and-after study with surveys in residential colleges at the target university in 2004 and 2014, and in random samples of students at the target university and three control universities in 2005 and 2013. The primary outcome was the prevalence of recent intoxication, while we analysed drinking per se and drinking in selected locations to investigate mechanisms of change. Results: The 7-day prevalence of intoxication decreased from 45% in 2004 to 33% in 2014 (absolute difference: 12%; 95% CI: 7% to 17%) among students living in residential colleges, and from 40% in 2005 to 26% in 2013 (absolute difference: 14%; 95% CI: 8% to 20%) in the wider student body of the intervention university. The intervention effect estimate, representing the change at the intervention university adjusted for change at other universities (aOR = 1.30; 95% CI: 0.89 to 1.90), was consistent with a benefit of intervention but was not statistically significant (p = 0.17). Conclusion: In this period of alcohol policy reform, drinking to intoxication decreased substantially in the targeted student population. Policy reforms and coincidental environmental changes may each have contributed to these reductions.

Dietary composition of endangered seahorses determined by stable isotope analysis

2017 ◽  
Vol 68 (5) ◽  
pp. 831 ◽  
Author(s):  
S. Valladares ◽  
D. X. Soto ◽  
M. Planas
Keyword(s):  
Stable Isotope ◽  
Environmental Changes ◽  
Conservation Status ◽  
Management Strategies ◽  
Isotope Analysis ◽  
Primary Source ◽  
Habitat Characteristics ◽  
Conservation Actions ◽  
Isotope Mixing Models ◽  
North Western

The lack of integrated measures for assessing the feeding ecology of seahorses may restrict the effectiveness of conservation actions on wild populations of worldwide threatened seahorse species. Identifying dietary sources will allow researchers to determine their degree of vulnerability to environmental changes, redefine their conservation status and apply appropriate management strategies. The resource use of the seahorse Hippocampus guttulatus inhabiting coastal waters of Galicia (north-western Iberian Peninsula) was assessed for three populations and 2 years using stable isotope mixing models. The Bayesian mixing model (MixSIAR) estimated the relative contributions of the dietary sources to the seahorse diet and revealed that Caprellidea were the primary source, followed by Gammaridea and Caridea. Mysidae and Annelida represented the less dominant prey. This prey preference can be explained by the foraging behaviour of seahorses. Different contributions of Gammaridea and Caridea to the diet were found among sites, indicating different habitat characteristics and hence different habitat use by seahorses within each site. In addition, differences were encountered among sexes. Caprellidea was the dominant prey for females, whereas Gammaridea was the dominant prey for males. The findings of the present study will contribute to the knowledge of feeding patterns of H. guttulatus, providing relevant data for conservation of this endangered species.

scholarly journals Plankton and water quality variability in an estuary before and after the shrimp farming effluents: possible impacts and regeneration

2017 ◽  
Vol 65 (3) ◽  
pp. 495-508
Author(s):  
William Bauer ◽  
Paulo Cesar Abreu ◽  
Luis Henrique Poersch
Keyword(s):  
Water Quality ◽  
Quality Parameters ◽  
Pacific White Shrimp ◽  
Shrimp Farming ◽  
Water Quality Parameters ◽  
White Shrimp ◽  
Zooplankton Abundance ◽  
Patos Lagoon ◽  
Short Period ◽  
Before And After

Abstract Water quality, chlorophyll a, phytoplankton, proto and mezo-zooplankton abundance were spatiotemporally evaluated in an estuary receiving effluents from a Pacific white shrimp Litopenaeus vannamei farm in Patos Lagoon estuary, Southern Brazil. Samples were taken before (BD) and; 1 day (1 PD) 5 days (5 PD), 10 days (10 PD), 20 days (20 PD) and 30 days (30 PD) after the effluents discharge. Some water quality parameters were affected by the effluents discharge; however, these changes were restricted to a distance of 20 m from the effluent discharge channel for a period of 5 days. The microbial community was dominated by chlorophyceae, followed by diatoms, cyanobacteria and ciliates. There was an increase in the abundance of different groups on the 1 PD sampling compared to BD. The zooplankton abundance was low in practically all sites, except for 30 PD sampling. The meso-zooplanktonic organisms were represented by copepods, mostly Acartia tonsa. Despite some effects on water quality and phytoplankton and protozooplankton abundance until 5 PD sampling, these alterations dissipated in a short period of time. We conclude that the environment quickly assimilated the effluents discharge, and the water quality parameters remained within the limits stipulated by standard guidelines.

scholarly journals A network-based approach to deciphering a dynamic microbiome’s response to a subtle perturbation

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Grace Tzun-Wen Shaw ◽  
An-Chi Liu ◽  
Chieh-Yin Weng ◽  
Yi-Chun Chen ◽  
Cheng-Yu Chen ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Ecosystem Functioning ◽  
Environmental Changes ◽  
Ecosystem Dynamics ◽  
Environmental Research ◽  
Human Society ◽  
The Past ◽  
Environmental Perturbations ◽  
Before And After ◽  
Occurrence Patterns

Abstract Over the past decades, one main issue that has emerged in ecological and environmental research is how losses in biodiversity influence ecosystem dynamics and functioning, and consequently human society. Although biodiversity is a common indicator of ecosystem functioning, it is difficult to measure biodiversity in microbial communities exposed to subtle or chronic environmental perturbations. Consequently, there is a need for alternative bioindicators to detect, measure, and monitor gradual changes in microbial communities against these slight, chronic, and continuous perturbations. In this study, microbial networks before and after subtle perturbations by adding S. acidaminiphila showed diverse topological niches and 4-node motifs in which microbes with co-occurrence patterns played the central roles in regulating and adjusting the intertwined relationships among microorganisms in response to the subtle environmental changes. This study demonstrates that microbial networks are a good bioindicator for chronic perturbation and should be applied in a variety of ecological investigations.

scholarly journals Aras Valley (northwest Iran): high-resolution stratigraphy of a continuous central Tethyan Permian–Triassic boundary section

Fossil Record ◽  
2020 ◽  
Vol 23 (1) ◽  
pp. 33-69 ◽  
Author(s):  
Jana Gliwa ◽  
Abbas Ghaderi ◽  
Lucyna Leda ◽  
Martin Schobben ◽  
Sara Tomás ◽  
...  
Keyword(s):  
High Resolution ◽  
Carbon Isotopes ◽  
Environmental Changes ◽  
Triassic Boundary ◽  
Nw Iran ◽  
Environmental Setting ◽  
Before And After ◽  
Permian Extinction ◽  
Permian Mass Extinction ◽  
Permian Triassic Boundary

Abstract. The Permian–Triassic boundary section in the Aras Valley in NW Iran is investigated with respect to carbonate microfacies, biostratigraphy (particularly conodonts, nautiloids, and ammonoids), chemostratigraphy (carbon isotopes), and environmental setting. Correlation of the data allows the establishment of a high-resolution stratigraphy based on conodonts (with four Wuchiapingian, 10 Changhsingian, and three Griesbachian zones), ammonoids (with nine Changhsingian zones), and carbon isotopes; it forms the base for the reconstruction of the environmental changes before and after the end-Permian extinction event at the studied locality. In the Aras Valley section, there is no evidence for the development of anoxic conditions, associated with the end-Permian mass extinction.

scholarly journals Manejo da dor em punção venosa pediátrica: um pacote de medidas

2021 ◽  
Vol 11 (33) ◽  
pp. 157-168
Author(s):  
Larissa Grispan e Silva Guimarães ◽  
Natália Shinkai Binotto ◽  
Stela Faccioli Ederli ◽  
Mauren Teresa Grubisich Mendes Tacla
Keyword(s):  
Pain Management ◽  
Patient Care ◽  
Nursing Staff ◽  
Professional Growth ◽  
Management Strategies ◽  
Care Bundle ◽  
Evidence Based ◽  
Topical Anesthetic ◽  
Care Research ◽  
Before And After

Apresentar o processo de elaboração de um pacote de medidas para manejo da dor de crianças submetidas à punção venosa pela equipe de enfermagem. Pesquisa Convergente Assistencial, do tipo antes e após intervenção, realizada com a equipe de enfermagem de uma unidade pediátrica do sul do Brasil. Elaboração de pacote de medidas com seis estratégias selecionadas pela equipe de enfermagem a serem utilizadas antes e durante a punção venosa: preparo da criança e/ou acompanhante, posicionamento da criança, distração, amamentação, solução adocicada associada ou não à sucção não nutritiva e anestésico tópico. Os participantes manifestaram satisfação quanto ao modo de elaboração do mesmo, destacando a contribuição deste para seu crescimento profissional. O pacote de medidas otimizou a adoção das estratégias para manejo da dor. A Pesquisa Convergente Assistencial alicerçada na prática baseada em evidências mostrou-se adequada, visto que propiciou a aplicação de achados científicos no cenário assistencial considerando suas particularidades.Descritores: Manejo da Dor, Criança, Cateterismo Periférico, Enfermagem Baseada em Evidências. Management of pediatric venipuncture pain: a package of measuresAbstract: To present the process of elaboration of a patient care package for pain management in children undergoing venipuncture by the nursing staff. Convergent Care Research, before and after intervention, conducted with the nursing staff of a southern pediatric unit in Brazil. Patient care packege with six strategies, selected by the nursing staff, to be used before and during venipuncture: preparation of the child and/or companion, child positioning, distraction, breastfeeding, sweet-tasting solution with or without non-nutritive suction and topical anesthetic usage. The package of measures optimized the adoption of pain management strategies, highlighting its contribution to their professional growth. The patient care bundle optimized the adoption of strategies for pain management. The Convergent Care Research grounded in evidence-based practice showed appropriate, since it allowed the application of scientific findings in the care setting, considering its peculiarities.Descriptors: Pain Management, Child, Catheterization, Peripheral, Evidence-Based Nursing. Manejo del dolor de la venopunción pediátrica: un paquete de medidasResumen: Presentar el proceso de elaboración de un paquete de medidas para manejo del dolor de niños sometidos a la venopunción por el equipo de enfermería. Investigación Convergente Asistencial, del tipo antes y después de la intervención, realizada con el equipo de enfermería de una unidad pediátrica en el sur de Brasil. Paquete de medidas con seis estrategias seleccionadas por el equipo de enfermería que deben ser utilizadas antes y durante la venopunción: preparación del niño y/o acompañante, posicionamiento del niño, distracción, amamantamiento, solución dulce asociada o no a succión no nutritiva y anestésica tópica. Los participantes manifestaron satisfacción en cuanto al modo de elaboración del mismo, destacando la contribución de este para su crecimiento profesional. El paquete de medidas optimizó la adopción de estrategias para manejo del dolor. La Investigación Convergente Asistencial cimentada en la práctica basada en evidencias se mostró adecuada, visto que propició la aplicación de hallazgos científicos en el escenario asistencial considerando sus particularidades.Descriptores: Manejo del Dolor, Niño, Cateterismo Periférico, Enfermería Basada en la Evidencia.

scholarly journals Efficacy of Non-Halofuginone-Based Strategies to Prevent or Treat Cryptosporidiosis in Bovine Calves: A Systematic Review

2020 ◽  
Author(s):  
Julii Brainard ◽  
Charlotte C. Hammer ◽  
Kevin Tyler ◽  
Paul R. Hunter
Keyword(s):  
Systematic Review ◽  
Weight Gain ◽  
Kinase Inhibitors ◽  
Management Strategies ◽  
Evidence Base ◽  
High Morbidity ◽  
Case Control Studies ◽  
Nutritional Strategy ◽  
Before And After ◽  
Meta Analyses

Cryptosporidiosis is a common illness in young cattle that causes high morbidity and some mortality. A common prophylactic treatment are halofuginone products but it seems likely disease could be reduced by other other pharmacological products or some management strategies. We undertook a systematic review and meta-analyses on key outcomes for treatment of calves before and after 5 days of age with any management strategy, any nutritional strategy or any non-halofuginone product. A systematic literature search was undertaken with data extracted for outcomes = oocyst shedding, diarrhea, mortality and weight gain. Experiments had to describe results for same age animals in contemporary arms. Control animals had to be observed concurrently in planned experiments (pre-post and case-control studies were not eligible). Both randomized and other clinically controlled trials were eligible. Results were subgrouped by study design and outcomes were described in detail where at least two articles described the same treatment strategy. 55 articles were found. Significantly lower incidence of oocyst shedding, diarrhea burden and mortality was reported in many experimental arms, especially when animals started treatment before 5 days old. Weight gain was not mostly affected by treatment, however, by three weeks of age. The evidence base is at least encouraging but insufficient about paromomycin, bumped kinase inhibitors and azithromycin treatment, especially for diarrhea and oocyst shedding, given late or early. Azithromycin is the most promising of these.

Managing Smokefree Momentum: Young RYO Smokers’ Responses to Tobacco Endgame Strategies

2020 ◽  
Vol 40 (2) ◽  
pp. 250-265
Author(s):  
Shelagh Ferguson ◽  
Jan Brace-Govan ◽  
Janet Hoek ◽  
Matthew Mulconroy
Keyword(s):  
Public Policy ◽  
Environmental Changes ◽  
Management Strategies ◽  
Population Level ◽  
Sense Making ◽  
Consumer Resistance ◽  
Policy Initiatives ◽  
The Social ◽  
Depth Interviews ◽  
Tobacco Endgame

As more countries set smoking endgame goals and introduce measures to denormalize smoking, smokers’ experience of stigma may intensify and require new management strategies. Probing the tension between environmental changes that support population-level behaviour change and individuals’ sense making, which occurs at a micro, everyday level, provides unique insights into reactance, agency and stigma. Using a Foucauldian informed approach, we analyze how young RYO (roll-your-own tobacco) smokers internalize neoliberal marketplace economic norms and create positions of resistance. Experience-based videographies and in-depth interviews with 15 New Zealand young adults aged 20-30 illustrate how participants resist stigma and the social disapproval they experience. This analysis identifies how smoking denormalization affects practices and pleasures, and generates four discernible positions of resistance: Socialized, Comfort, Status and Pleasure Orientated Resistances. These highlight intersections between policy initiatives and consumer resistance, offering new insights relevant to public policy.

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