scholarly journals Characteristics of Sediment at Littoral Zone of Anoi Itam Beach (Eastern Weh Island, Indonesia) Based on Seasonal Changes

2020 ◽  
Vol 9 (3) ◽  
pp. 111-119
Author(s):  
Syahrul Purnawan ◽  
Sofyatuddin Karina ◽  
Rizka V Ayudia ◽  
Yopi Ilhamsyah ◽  
Ichsan Setiawan
Keyword(s):  
Seasonal Changes ◽  
High Variability ◽  
Seasonal Difference ◽  
Sediment Characteristics ◽  
South West ◽  
Littoral Zones ◽  
Sediment Data ◽  
The Impact ◽  
Sw Monsoon ◽  
Skewness And Kurtosis

Anoi Itam Beach (AIB), located in the eastern part of Weh Island, has the sediment characteristic of dark-sand color. Climatologically, the beach is influenced by two seasons, i.e., south-west (SW) monsoon and northeast (NE) monsoon. Sediment data are collected in the upper and lower littoral zones that are divided into six stations alongshore. Data were collected on October 2016 and April 2017, representing post-SW monsoon and post-NE monsoon events. To examine the effect of seasonal, sediments statistics, e.g., mean, sorting, skewness, and kurtosis, have been calculated. AIB was characterized as well sorted to poorly sorted sediment. Sediments were identified as mesokurtic in October, varied to leptokurtic and platikurtic in upper littoral and lower littoral, respectively, in April. Grain size in both upper and lower littoral had increased from October to April. The impact on sediment sortation was minor due to the seasonal difference. Sediments in the upper littoral vary slightly skewed than lower littoral, which response to a more positively skewed during seasonal change from SW-monsoon to NE monsoon. The results suggested that lower littoral provide high variability of sediment characteristics depend on the season. 

scholarly journals THE IMPACT OF SEASONAL CHANGES ON HEAVY MINERALS CONCENTRATION FROM A PART OF EAST COAST OF INDIA

2020 ◽  
Vol 5 (1) ◽  
pp. 12-21
Author(s):  
Ali Mohammad ◽  
E.N. Dhanamjayarao
Keyword(s):  
Seasonal Changes ◽  
East Coast ◽  
Heavy Mineral ◽  
Heavy Minerals ◽  
Sediment Characteristics ◽  
Seasonal Fluctuations ◽  
Post Monsoon ◽  
Seasonal Circulation ◽  
Mineral Concentrations ◽  
The Impact

Pre and post monsoonal changes in the environment have led to a noticeable variation in sediment characteristics, heavy mineral concentrations and their distribution. The current study aimed to find out the effect of seasonal fluctuations on the concentration of heavy minerals along the coast and the variations in sediment textures and distribution. The study has revealed the effect of seasons on the sediments supply and its distribution along coast in the study area. The total heavy minerals concentrations are more in post monsoon than in pre monsoon and the concentration also increases from south to north in parts of the study area because of seasonal circulation of currents from south to north along the shore. The micro textural study of the heavy mineral grains from different locations in the study area revealed the mechanical and chemical erosions on the grain surfaces.

scholarly journals Distribution Pattern of Macrobenthic Organisms In A Tropical Monsoon Influenced Port, New Mangalore, India

2021 ◽  
Author(s):  
Purushothaman Atchuthan ◽  
Dattesh Vithoba Desai ◽  
Arga Chandrashekar Anil
Keyword(s):  
Anthropogenic Impacts ◽  
Environmental Parameters ◽  
Habitat Characteristics ◽  
Macrobenthic Community ◽  
Sediment Characteristics ◽  
South West ◽  
South West Monsoon ◽  
South West Coast ◽  
The Impact

Abstract Study was carried out to understand the impact of natural and anthropogenic impacts on the macrobenthic organisms at the New Mangalore port, influenced by south-west monsoon located along the south-west coast of India. Soft bottom macrobenthos are the group of highly diverse benthic invertebrates in the coastal regions. The spatio-temporal variation in their abundance and diversity was observed along with the variations in the water column and sediment characteristics. Among the 61 taxa of macrobenthos reported, 41 belonged to the polychaetes. The organic carbon levels of >2% supported higher abundance of deposit feeders. A correlation in the abundance of polychaetes and sediment characteristics along with dissolved oxygen and pore water nutrients was observed. A shift in the community of macrobenthic species in response to environmental parameters was observed with the change in the season. During post-monsoon I, Prionospio sp., was dominant , whereas during pre-monsoon the amphipod, Ampelisca sp. was dominant. The abundance of opportunistic polychaetes, Prionospio sp., Cossura sp., and Tharyx filibranchia varied with the seasons indicating a change in the habitat characteristics during different seasons. The occurrence and dominance of macrobenthic speceis was influenced by the physical processes mainly governed by the exchange of seawater between the port and the Arabian sea. The stations located in the high circulation area showed higher seasonal variation in the macrobenthic community indicating pivotal role of local hydrodynamics on macrobenthic organisms. The occurrence of opportunistic species inside the port demonstrate the role of anthropogenic stress in structuring the macrobenthic community.

scholarly journals Seasonal feeding plasticity can facilitate coexistence of dominant omnivores in Neotropical streams

2021 ◽  
Author(s):  
Mayara P. Neves ◽  
Pavel Kratina ◽  
Rosilene L. Delariva ◽  
J. Iwan Jones ◽  
Clarice B. Fialho
Keyword(s):  
Seasonal Variation ◽  
Fish Species ◽  
Resource Availability ◽  
Seasonal Changes ◽  
Dry Season ◽  
Diet Overlap ◽  
Isotopic Niche ◽  
Neotropical Streams ◽  
Feeding Plasticity ◽  
The Impact

AbstractCoexistence of ecomorphologically similar species in diverse Neotropical ecosystems has been a focus of long-term debate among ecologists and evolutionary biologists. Such coexistence can be promoted by trophic plasticity and seasonal changes in omnivorous feeding. We combined stomach content and stable isotope analyses to determine how seasonal variation in resource availability influences the consumption and assimilation of resources by two syntopic fish species, Psalidodon aff. gymnodontus and P. bifasciatus, in the Lower Iguaçu basin. We also tested the impact of seasonality on trophic niche breadth and diet overlap of these two dominant omnivores. Seasonal changes in resource availability strongly influenced the consumption and assimilation of resources by the two fish species. Both species exhibited high levels of omnivory, characterized by high diversity of allochthonous resources in the wet season. Terrestrial invertebrates were the main component of diet during this season. However, in the dry season, both species reduced their isotopic niches, indicating diet specialization. High diet overlap was observed in both seasons, but the isotopic niche overlap was smaller in the dry season. Substantial reduction in the isotopic niche of P. bifascistus and a shift toward aquatic invertebrates can facilitate coexistence during this season of resource shortage. Feeding plasticity allows omnivorous fish to adjust their trophic niches according to seasonality, promoting the exploitation of different resources during periods of greater resource diversity. This seasonal variation could be an important mechanism that contributes to the resource partitioning and coexistence of dominant omnivores in Neotropical streams.

scholarly journals Seasonal changes in water quality and macrophytes and the impact of cattle on tropical floodplain waterholes

2012 ◽  
Vol 63 (9) ◽  
pp. 788 ◽  
Author(s):  
N. E. Pettit ◽  
T. D. Jardine ◽  
S. K. Hamilton ◽  
V. Sinnamon ◽  
D. Valdez ◽  
...  
Keyword(s):  
Water Quality ◽  
Seasonal Changes ◽  
Aquatic Macrophyte ◽  
Plant Cover ◽  
Critical Role ◽  
Dry Season ◽  
Nutrient Concentrations ◽  
Wet Season ◽  
Dry Tropics ◽  
The Impact

The present study indicates the critical role of hydrologic connectivity in floodplain waterholes in the wet–dry tropics of northern Australia. These waterbodies provide dry-season refugia for plants and animals, are a hotspot of productivity, and are a critical part in the subsistence economy of many remote Aboriginal communities. We examined seasonal changes in water quality and aquatic plant cover of floodplain waterholes, and related changes to variation of waterhole depth and visitation by livestock. The waterholes showed declining water quality through the dry season, which was exacerbated by more frequent cattle usage as conditions became progressively drier, which also increased turbidity and nutrient concentrations. Aquatic macrophyte biomass was highest in the early dry season, and declined as the dry season progressed. Remaining macrophytes were flushed out by the first wet-season flows, although they quickly re-establish later during the wet season. Waterholes of greater depth were more resistant to the effects of cattle disturbance, and seasonal flushing of the waterholes with wet-season flooding homogenised the water quality and increased plant cover of previously disparate waterholes. Therefore, maintaining high levels of connectivity between the river and its floodplain is vital for the persistence of these waterholes.

The impact of adaptability on the competitiveness of non-State pension funds

2021 ◽  
Vol 27 (11) ◽  
pp. 2606-2636
Author(s):  
Ekaterina S. YAROVAYA
Keyword(s):  
Pension Fund ◽  
Pension Funds ◽  
High Variability ◽  
Current Time ◽  
Factors Affecting ◽  
Existing Problems ◽  
State Pension ◽  
The Impact ◽  
State Pension Funds

Subject. This article deals with the analysis of competitiveness, which is an important component of the strategic management of a non-State pension fund. Objectives. The article aims to study the existing approaches to the analysis of competitiveness, determine the role of the indicator of adaptability of competitiveness of non-State pension funds in conditions of high variability of the external environment, and formulate recommendations for drawing up criteria for the enterprise competitiveness taking into account the specifics of the activities of the funds. Methods. For the study, I used analysis, and the systems, and structural and functional approaches. Results. The article defines and classifies the factors affecting the competitiveness of non-State pension funds in modern market conditions. It substantiates the influence of the indicator of adaptability on the competitiveness of non-State pension funds. The article also proposes an approach to ranking this indicator, which can be applied regardless of the chosen method for assessing the competitiveness of non-State pension funds. Conclusions. The article concludes that the testing of the assessment of the non-State pension fund competitiveness using the author-proposed adaptability indicator helps determine the level of non-State pension fund competitiveness at the current time, track the changes, and identify the existing problems, the causes of their occurrence, and thereby ensure the conditions under which the non-State pension fund has the opportunity to promptly respond and adapt to external changes thus ensuring its stability in the market.

scholarly journals Trends in incidence of pneumococcal disease before introduction of conjugate vaccine: South West England, 1996–2005

2007 ◽  
Vol 136 (8) ◽  
pp. 1096-1102 ◽  
Author(s):  
C. A. IHEKWEAZU ◽  
D. A. B. DANCE ◽  
R. PEBODY ◽  
R. C. GEORGE ◽  
M. D. SMITH ◽  
...  
Keyword(s):  
Blood Culture ◽  
Pneumococcal Disease ◽  
Annual Incidence ◽  
Protection Agency ◽  
South West ◽  
The Mean ◽  
The Impact ◽  
Susceptibility And Resistance ◽  
South West England ◽  
Immunization Programmes

SUMMARYIntroduction of pneumococcal conjugate and polysaccharide vaccines into the United Kingdom's routine immunization programmes is expected to change the epidemiology of invasive pneumococcal disease (IPD). We have documented the epidemiology of IPD in an English region (South West) with high-quality surveillance data before these programmes were established. We analysed data on isolates of Streptococcus pneumoniae from blood and CSF between 1996 and 2005 from microbiology laboratories in the South West that were reported and/or referred for serotyping to the Health Protection Agency Centre for Infections. The mean annual incidence of IPD increased from 11·2/100 000 in 1996 to 13·6/100 000 in 2005 (P<0·04). After adjusting for annual blood-culture sampling rates in hospitals serving the same catchment populations, an increase in annual incidence of IPD was no longer observed (P=1·0). Variation in overall incidence between laboratories could also be explained by variation in blood culture rates. The proportion of disease caused by serotypes 6B, 9V and 14 decreased significantly (P=0·001, P=0·007, and P=0·027 respectively) whereas that caused by serotype 4, 7F and 1 increased (P=0·001, P=0·003, and P<0·001 respectively) between 2000 and 2005. The level of penicillin non-susceptibility and resistance to erythromycin remained stable (2% and 12% respectively). This study provides an important baseline to assess the impact of changing vaccination programmes on the epidemiology of IPD, thus informing future use of pneumococcal vaccines.

Temperature variation and the incidence of cluster headache periods: A nationwide population study

Cephalalgia ◽  
2014 ◽  
Vol 34 (9) ◽  
pp. 656-663 ◽  
Author(s):  
Y-Jung Lee ◽  
Yung-Tai Chen ◽  
Shuo-Ming Ou ◽  
Szu-Yuan Li ◽  
Albert C Yang ◽  
...  
Keyword(s):  
Cluster Headache ◽  
Seasonal Changes ◽  
Meteorological Factors ◽  
Nationwide Survey ◽  
Research Database ◽  
Case Crossover ◽  
Mean Temperature ◽  
Taiwan National Health Insurance ◽  
Central Weather Bureau ◽  
The Impact

Background Cluster headache (CH) is well known to show a seasonal predilection; however, the impact of temperature and other meteorological factors on cluster periods (or bouts) has not been established. Methods This nationwide survey included 758 patients with episodic CH retrieved from the Taiwan National Health Insurance Research Database from 2005 to 2009. Corresponding meteorological recordings were obtained from the Central Weather Bureau. A case-crossover study design was used to investigate the association between cluster periods and meteorological factors. Results A total of 2452 episodes of cluster periods were recorded. The cluster periods were most frequent in the autumn and least frequent in the winter. Seasonal changes from winter to spring and from autumn to winter also increased the frequency of cluster periods. The risk of cluster periods increased when there was a higher mean temperature on event days (odds ratio (OR), 1.014, 95% confidence interval (CI), 1.005–1.023, p = 0.003) or within seven to 56 days. Either an increase or a decrease in temperature (0.05℃/day) following a warm period (mean temperature ≥26℃) was associated with the onset of cluster periods. In contrast, a greater increase in temperature (0.15℃/day) following a cold period (mean temperature < 21℃) was needed to evoke cluster periods. No such associations were found following moderate periods (21℃ ≤mean temperature <26℃). Discussion Our study shows that temperature is associated with precipitating or priming cluster periods. The influence depends on the temperature of the preceding periods.

Cumulative reproductive performance effect on overall lifetime productivity in Merino sheep

2018 ◽  
Vol 58 (8) ◽  
pp. 1470
Author(s):  
J. S. Richards ◽  
M. A. Sladek ◽  
G. J. Lee
Keyword(s):  
Reproductive Performance ◽  
New South ◽  
Dental Health ◽  
Age Groups ◽  
The South ◽  
Performance Effect ◽  
South West ◽  
South Wales ◽  
The Impact ◽  
Effect Of Age

Reproduction is an important driver of profitability in commercial sheep flocks. Historically, Merino flocks have been run with a fixed age structure, ignoring individual merit and casting for age at a specific age. More recently, research has focussed on utilising the variation within age groups by keeping productive older ewes longer and culling less productive ewes earlier. Previous studies have also examined the effect of age on reproduction and the impact of reproduction status on productivity, but little research has been conducted on cumulative effects of reproductive performance on later productivity, reproduction and health. The present study examined the impact of higher lifetime reproduction on other key production and fitness traits in older ewes run under commercial conditions. Data were collected from two commercial wool-producing properties in the South West Slopes and the Central West Plains of New South Wales during 2009–2011. Reproduction, fleece measurements, bodyweight and condition and dental health were recorded during the study. The results showed that age had a bigger effect on productivity and dental health than did cumulative lifetime reproduction. Environment and genetics determined the level of impact, with minimal loss in productivity from increased age of animals occurring in the South West Slopes flock, whereas the Central West Plains flock would appear to require closer monitoring of productivity as ewes aged. The data collected did not allow separation of the genetic and environmental influences within the study. Retaining animals with a higher reproductive performance past normal culling age does not necessarily result in reduction of productivity or ewe health, but this must be monitored.

scholarly journals Risk of Plasmodium falciparum infection in south-west Burkina Faso - potential impact of expanding eligibility for seasonal malaria chemoprevention

2021 ◽  
Author(s):  
Anne L Wilson ◽  
Steve W Lindsay ◽  
Alfred Tiono ◽  
Jean Baptiste Yaro ◽  
Hilary Ranson ◽  
...  
Keyword(s):  
Risk Factors ◽  
Plasmodium Falciparum ◽  
Burkina Faso ◽  
Malaria Transmission ◽  
Malaria Control ◽  
Control Measures ◽  
Sub Saharan Africa ◽  
South West ◽  
Seasonal Malaria Chemoprevention ◽  
The Impact

Abstract Background Burkina Faso has one of the highest malaria burdens in sub-Saharan Africa despite the mass deployment of insecticide-treated nets (ITNs) and use of seasonal malaria chemoprevention (SMC) in children aged up to 5 years. Identification of risk factors for Plasmodium falciparum infection in rural Burkina Faso could help to identify and target malaria control measures. Methods A cross-sectional survey of 1,199 children and adults was conducted during the peak malaria transmission season in south-west Burkina Faso in 2017. Logistic regression was used to identify risk factors for microscopically confirmed P. falciparum infection. A malaria transmission dynamic model was used to determine the impact on malaria cases averted of administering SMC to children aged 5–15 year old. Results P. falciparum prevalence was 32.8% in the study population. Children aged 5 to < 10 years old were at 3.74 times the odds (95% CI = 2.68–5.22, p < 0.001) and children aged 10 to 15 years old at 3.14 times the odds (95% CI = 1.20–8.21, p = 0.02) of P. falciparum infection compared to children aged less than 5 years old. Administration of SMC to children aged up to 10 years is predicted to avert an additional 57 malaria cases per 1000 population per year (9.4% reduction) and administration to children aged up to 15 years would avert an additional 89 malaria cases per 1000 population per year (14.6% reduction) in the Cascades Region, assuming coverage of pyrethroid-piperonyl butoxide ITNs. Conclusion Malaria infections were high in all age strata, although highest in children aged 5 to 15 years, despite roll out of core malaria control interventions. Given the burden of infection in school-age children, extension of the eligibility criteria for SMC could help reduce the burden of malaria in Burkina Faso and other countries in the region.

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