Can recovery from disturbance explain observed declines in total phosphorus in Precambrian Shield catchments?

The plausibility of land disturbance as a cause of declining phosphorus (P) concentrations in oligotrophic lakes within south-central Ontario, Canada, is evaluated using the process-based model INCA-P. The model was calibrated upon three catchments in the Muskoka–Haliburton region (MHR): Harp (HP), Dickie (DE), and Plastic (PC), which have varying degrees of declining P export and different forms of historic disturbances (timber harvesting, tree death, and soil acidification, respectively). Hindcasts (1978–2007) were run with and without simulated disturbances. Model performance of both DE and HP was greatly improved when effects of wetland tree deaths (DE) and harvesting (HP) were included. In PC, with no record of timber harvesting and relatively minor declines in P, initial hindcasts successfully accounted for the majority of interannual P fluxes, and performance was only marginally improved through the simulation of soil acidification. Vegetation decay, harvesting, and catchment acidification accounted for 63%, 24%, and 0.6%, respectively, of P export over the past 30 years. Of all disturbances, wetland vegetation death had the highest impact on areal P exports, indicating that riparian stability is particularly important.

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Spatial and temporal patterns in total phosphorus in south-central Ontario streams: the role of wetlands and past disturbance

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/cjfas-2012-0474 ◽

2013 ◽

Vol 70 (5) ◽

pp. 766-774 ◽

Cited By ~ 11

Author(s):

Heather D. O'Brien ◽

M. Catherine Eimers ◽

Shaun A. Watmough ◽

Nora J. Casson

Keyword(s):

Water Chemistry ◽

Total Phosphorus ◽

Spatial And Temporal Patterns ◽

Forested Catchments ◽

The Past ◽

Research Priority ◽

South Central ◽

Longitudinal Measurements ◽

Wetland Cover

Unraveling the cause(s) of declines in total phosphorus (TP) observed over the past three decades across many forested catchments in central Ontario remains a research priority. The objectives of this paper were firstly to test the assumption that weir water chemistry is representative of catchment changes at two adjacent headwater streams that have shown declines in TP and secondly use long-term measurements of weir water quality (1980–2008) to identify potential drivers of TP declines. Longitudinal measurements confirmed that weir water chemistry is generally representative of the entire stream channel, although channel-associated wetlands have a strong influence on TP. Additionally, processes operating in wetlands dictate seasonal patterns in TP, and differences in wetland cover explain the approximately twofold difference in average TP between the two catchments. Changes in wetland cover or processes, however, cannot explain declines in TP. Rather, declines in TP are most coherent with declines in stream potassium (K) and nitrate (NO3-N), which also occurred over the past 30 years. We suggest that coincident declines in TP, NO3-N, and K may be best explained by recovery from a disturbance event.

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Vom Forst zum Wald. Entwicklungstendenzen im naturnahen Waldbau | From a Production-Oriented Forest to a Multipurpose Forest. New Trends in Near-Natural Silviculture

Schweizerische Zeitschrift fur Forstwesen ◽

10.3188/szf.1999.0484 ◽

1999 ◽

Vol 150 (12) ◽

pp. 484-488 ◽

Cited By ~ 3

Author(s):

Wolf Hockenjos

Keyword(s):

Forest Management ◽

Timber Harvest ◽

Timber Harvesting ◽

Natural Forest ◽

The Other ◽

Private Forest ◽

Wide Spread ◽

Great Demand ◽

The Past ◽

Forest Enterprises

Concepts of near-natural forestry are in great demand these days. Most German forest administrations and private forest enterprises attach great importance to being as «near-natural» as possible. This should allow them to make the most of biological rationalisation. The concept of near-natural forestry is widely accepted, especially by conservationists. However, it is much too early to analyse how successful near-natural forestry has been to date, and therefore to decide whether an era of genuine near-natural forest management has really begun. Despite wide-spread recognition, near-natural forestry is jeopardised by mechanised timber harvesting, and particularly by the large-timber harvester. The risk is that machines, which are currently just one element of the timber harvest will gain in importance and gradually become the decisive element. The forest would then be forced to meet the needs of machinery, not the other way round. Forests would consequently become so inhospitable that they would bear no resemblance to the sylvan image conjured up by potential visitors. This could mean taking a huge step backwards: from a near-natural forest to a forest dominated by machinery. The model of multipurpose forest management would become less viable, and the forest would become divided into areas for production, and separate areas for recreation and ecology. The consequences of technical intervention need to be carefully considered, if near-natural forestry is not to become a thing of the past.

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Progress and Prospects in Translating Nanobiotechnology in Medical Theranostics

Current Nanoscience ◽

10.2174/1573413715666191126093258 ◽

2020 ◽

Vol 16 (5) ◽

pp. 685-707 ◽

Cited By ~ 1

Author(s):

Amna Batool ◽

Farid Menaa ◽

Bushra Uzair ◽

Barkat Ali Khan ◽

Bouzid Menaa

Keyword(s):

Biological Properties ◽

Chemical Characteristics ◽

Intrinsic Properties ◽

The Past ◽

Profound Influence ◽

Functionalized Nanomaterials ◽

Physico Chemical ◽

Properties Of Materials ◽

Targeted Drug ◽

And Performance

: The pace at which nanotheranostic technology for human disease is evolving has accelerated exponentially over the past five years. Nanotechnology is committed to utilizing the intrinsic properties of materials and structures at submicroscopic-scale measures. Indeed, there is generally a profound influence of reducing physical dimensions of particulates and devices on their physico-chemical characteristics, biological properties, and performance. The exploration of nature’s components to work effectively as nanoscaffolds or nanodevices represents a tremendous and growing interest in medicine for various applications (e.g., biosensing, tunable control and targeted drug release, tissue engineering). Several nanotheranostic approaches (i.e., diagnostic plus therapeutic using nanoscale) conferring unique features are constantly progressing and overcoming all the limitations of conventional medicines including specificity, efficacy, solubility, sensitivity, biodegradability, biocompatibility, stability, interactions at subcellular levels. : This review introduces two major aspects of nanotechnology as an innovative and challenging theranostic strategy or solution: (i) the most intriguing (bare and functionalized) nanomaterials with their respective advantages and drawbacks; (ii) the current and promising multifunctional “smart” nanodevices.

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Pupil with Obsessive-Compulsive Disorder

Lifelong Learning ◽

10.11118/lifele201707027 ◽

2017 ◽

Vol 7 (2) ◽

pp. 7-25

Author(s):

Karolina Diallo

Keyword(s):

Obsessive Compulsive Disorder ◽

School Performance ◽

School Environment ◽

Detrimental Effect ◽

Obsessive Compulsive ◽

Compulsive Disorder ◽

The Past ◽

And Performance ◽

The Impact

Pupil with Obsessive-Compulsive Disorder. Over the past twenty years childhood OCD has received more attention than any other anxiety disorder that occurs in the childhood. The increasing interest and research in this area have led to increasing number of diagnoses of OCD in children and adolescents, which affects both specialists and teachers. Depending on the severity of symptoms OCD has a detrimental effect upon child's school performance, which can lead almost to the impossibility to concentrate on school and associated duties. This article is devoted to the obsessive-compulsive disorder and its specifics in children, focusing on the impact of this disorder on behaviour, experience and performance of the child in the school environment. It mentions how important is the role of the teacher in whose class the pupil with this diagnosis is and it points out that it is necessary to increase teachers' competence to identify children with OCD symptoms, to take the disease into the account, to adapt the course of teaching and to introduce such measures that could help children reduce the anxiety and maintain (or increase) the school performance within and in accordance with the school regulations and curriculum.

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Sensitivity and Performance Analyses of the Distributed Hydrology–Soil–Vegetation Model Using Geomorphons for Landform Mapping

Water ◽

10.3390/w13152032 ◽

2021 ◽

Vol 13 (15) ◽

pp. 2032

Author(s):

Pâmela A. Melo ◽

Lívia A. Alvarenga ◽

Javier Tomasella ◽

Carlos R. Mello ◽

Minella A. Martins ◽

...

Keyword(s):

Complex Terrain ◽

Overland Flow ◽

Hydrological Model ◽

Model Performance ◽

Soil Parameters ◽

Vegetation Model ◽

Landform Classification ◽

Physically Based ◽

And Performance ◽

Streamflow Simulation

Landform classification is important for representing soil physical properties varying continuously across the landscape and for understanding many hydrological processes in watersheds. Considering it, this study aims to use a geomorphology map (Geomorphons) as an input to a physically based hydrological model (Distributed Hydrology Soil Vegetation Model (DHSVM)) in a mountainous headwater watershed. A sensitivity analysis of five soil parameters was evaluated for streamflow simulation in each Geomorphons feature. As infiltration and saturation excess overland flow are important mechanisms for streamflow generation in complex terrain watersheds, the model’s input soil parameters were most sensitive in the “slope”, “hollow”, and “valley” features. Thus, the simulated streamflow was compared with observed data for calibration and validation. The model performance was satisfactory and equivalent to previous simulations in the same watershed using pedological survey and moisture zone maps. Therefore, the results from this study indicate that a geomorphologically based map is applicable and representative for spatially distributing hydrological parameters in the DHSVM.

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Characterizing Bilingual Effects on Cognition: The Search for Meaningful Individual Differences

Brain Sciences ◽

10.3390/brainsci11010081 ◽

2021 ◽

Vol 11 (1) ◽

pp. 81

Author(s):

Kristina C. Backer ◽

Heather Bortfeld

Keyword(s):

Individual Differences ◽

Cognitive Processes ◽

Language Background ◽

Bilingual Advantage ◽

The Past ◽

General Movement ◽

And Performance ◽

Task Irrelevant ◽

Analytical Approaches ◽

The Relationship

A debate over the past decade has focused on the so-called bilingual advantage—the idea that bilingual and multilingual individuals have enhanced domain-general executive functions, relative to monolinguals, due to competition-induced monitoring of both processing and representation from the task-irrelevant language(s). In this commentary, we consider a recent study by Pot, Keijzer, and de Bot (2018), which focused on the relationship between individual differences in language usage and performance on an executive function task among multilingual older adults. We discuss their approach and findings in light of a more general movement towards embracing complexity in this domain of research, including individuals’ sociocultural context and position in the lifespan. The field increasingly considers interactions between bilingualism/multilingualism and cognition, employing measures of language use well beyond the early dichotomous perspectives on language background. Moreover, new measures of bilingualism and analytical approaches are helping researchers interrogate the complexities of specific processing issues. Indeed, our review of the bilingualism/multilingualism literature confirms the increased appreciation researchers have for the range of factors—beyond whether someone speaks one, two, or more languages—that impact specific cognitive processes. Here, we highlight some of the most salient of these, and incorporate suggestions for a way forward that likewise encompasses neural perspectives on the topic.

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Derivation of S-Curve from Oscillatory Hydrograph Using Digital Filter

Water ◽

10.3390/w13111456 ◽

2021 ◽

Vol 13 (11) ◽

pp. 1456

Author(s):

Kee-Won Seong ◽

Jang Hyun Sung

Keyword(s):

Digital Filter ◽

Model Performance ◽

Performance Criteria ◽

Rainfall Runoff ◽

Small Watershed ◽

Unit Hydrograph ◽

Time To Peak ◽

S Curve ◽

And Performance ◽

Smooth Data

An oscillatory S-curve causes unexpected fluctuations in a unit hydrograph (UH) of desired duration or an instantaneous UH (IUH) that may affect the constraints for hydrologic stability. On the other hand, the Savitzky–Golay smoothing and differentiation filter (SG filter) is a digital filter known to smooth data without distorting the signal tendency. The present study proposes a method based on the SG filter to cope with oscillatory S-curves. Compared to previous conventional methods, the application of the SG filter to an S-curve was shown to drastically reduce the oscillation problems on the UH and IUH. In this method, the SG filter parameters are selected to give the minimum influence on smoothing and differentiation. Based on runoff reproduction results and performance criteria, it appears that the SG filter performed both smoothing and differentiation without the remarkable variation of hydrograph properties such as peak or time-to peak. The IUH, UH, and S-curve were estimated using storm data from two watersheds. The reproduced runoffs showed high levels of model performance criteria. In addition, the analyses of two other watersheds revealed that small watershed areas may experience scale problems. The proposed method is believed to be valuable when error-prone data are involved in analyzing the linear rainfall–runoff relationship.

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PROBLEMATIC ASPECTS OF IMPLEMENTATION OF ADMINISTRATIVE RESPONSIBILITY FOR NON-PAYMENT OF CHILD SUPPORT

International scientific journal Internauka Series Juridical Sciences ◽

10.25313/2520-2308-2021-7-7422 ◽

2017 ◽

Author(s):

Viktoriia Chokhrii ◽

Keyword(s):

Child Support ◽

Local Governments ◽

The State ◽

The Past ◽

Control Functions ◽

Labor Legislation ◽

And Performance ◽

Administrative Penalty ◽

Executive Body ◽

Administrative Responsibility

The article is devoted to the consideration of problematic aspects of the implementation of administrative responsibility for non-payment of child support, is used in the form of socially useful work. In particular, the essence of this type of administrative penalty is revealed. The study focuses on the problematic issues that arise in the implementation of the imposed administrative responsibility in the form of socially useful work. A number of problems concerning the legal application of Article 183-1 of the Code of Ukraine on Administrative Offenses (hereinafter – the Code of Administrative Offenses) and ways of their solution have been outlined. Amendments to the current legislation of Ukraine are proposed in order to improve the implementation of resolutions in cases of administrative offenses. In particular, it is proposed to monitor the workload of the staff of the territorial bodies of the State Executive Service in Ukraine and analyze their staffing standards and functional responsibilities for the preparation of materials under Article 183-1 of the Code of Administrative Offenses. In addition, it was proposed to improve the organization of the performance of socially useful work by local governments by conducting appropriate explanatory work and methodological assistance to local governments in organizing the solution of this issue. The article proposes to transfer control functions to the executive body, and to improve the duty imposed on local governments to provide socially useful work is to improve, including amendments to the labor legislation of Ukraine. It is noted that when drawing up an administrative offense or making a decision in the case, it is necessary to find out the presence or absence of circumstances that for good reasons made it impossible for the debtor to pay child support, or the existing alimony arrears for the past period. The expediency of development of methodical recommendations for local self-government bodies concerning the order of definition and performance of socially useful works is substantiated.

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Trade competitiveness and export performance of Indian cardamom

Journal of Spices and Aromatic Crops ◽

10.25081/josac.2019.v28.i1.5742 ◽

1970 ◽

pp. 34-42

Author(s):

L Thomas, P Rajeev, P C Sanil

Keyword(s):

International Trade ◽

Export Performance ◽

Secondary Data ◽

Export Markets ◽

Trade Data ◽

The Past ◽

Export Competitiveness ◽

Trade Competitiveness ◽

And Performance ◽

Research Investments

India is one of the major producers and consumer of cardamom. The export performance of cardamom has witnessed several changes over the past few decades. This paper analyses the trends and performance of cardamom commodity from India. Using secondary data from the Spices Board and the Ministry of Commerce along with international trade data from the United Nations International Trade Statistics Database, the trend in the domestic production and export markets is clearly drawn out. The changes in Revealed Comparative Advantage in cardamom exports over the years is used to study the level and changes in the export competitiveness of the commodity. The study identifies a revival in export competiveness in the recent years along with an increase in the share of global cardamom exports. The highly concentrated production of cardamom, the preference for Indian cardamom in Middle East economies and the revival of export competitiveness can benefit the Indian cardamom producers. The study argues for strengthening research investments in cardamom for sustaining and enhancing the benefits from cardamom exports from the country.

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Physiological Responses and Predictors of Performance in a Simulated Competitive Ski Mountaineering Race

Journal of Sports Science and Medicine ◽

10.52082/jssm.2021.250 ◽

2021 ◽

pp. 250-257

Author(s):

Michael Lasshofer ◽

John Seifert ◽

Anna-Maria Wörndle ◽

Thomas Stöggl

Keyword(s):

Laboratory Test ◽

Power Output ◽

Ventilatory Threshold ◽

Elite Athletes ◽

Physiological Responses ◽

Performance Parameters ◽

Ramp Test ◽

The Past ◽

Treadmill Speed ◽

And Performance

Competitive ski mountaineering (SKIMO) has achieved great popularity within the past years. However, knowledge about the predictors of performance and physiological response to SKIMO racing is limited. Therefore, 21 male SKIMO athletes split into two performance groups (elite: VO2max 71.2 ± 6.8 ml· min-1· kg-1 vs. sub-elite: 62.5 ± 4.7 ml· min-1· kg-1) were tested and analysed during a vertical SKIMO race simulation (523 m elevation gain) and in a laboratory SKIMO specific ramp test. In both cases, oxygen consumption (VO2), heart rate (HR), blood lactate and cycle characteristics were measured. During the race simulation, the elite athletes were approximately 5 min faster compared with the sub-elite (27:15 ± 1:16 min; 32:31 ± 2:13 min; p < 0.001). VO2 was higher for elite athletes during the race simulation (p = 0.046) and in the laboratory test at ventilatory threshold 2 (p = 0.005) and at maximum VO2 (p = 0.003). Laboratory maximum power output is displayed as treadmill speed and was higher for elite than sub-elite athletes (7.4 ± 0.3 km h-1; 6.6 ± 0.3 km h-1; p < 0.001). Lactate values were higher in the laboratory maximum ramp test than in the race simulation (p < 0.001). Pearson’s correlation coefficient between race time and performance parameters was highest for velocity and VO2 related parameters during the laboratory test (r > 0.6). Elite athletes showed their superiority in the race simulation as well as during the maximum ramp test. While HR analysis revealed a similar strain to both cohorts in both tests, the superiority can be explainable by higher VO2 and power output. To further push the performance of SKIMO athletes, the development of named factors like power output at maximum and ventilatory threshold 2 seems crucial.

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