Global assessment of nitrogen deposition effects on terrestrial plant diversity : a synthesis

Atmospheric nitrogen (N) deposition is it recognized threat to plant diversity ill temperate and northern parts of Europe and North America. This paper assesses evidence from field experiments for N deposition effects and thresholds for terrestrial plant diversity protection across a latitudinal range of main categories of ecosystems. from arctic and boreal systems to tropical forests. Current thinking on the mechanisms of N deposition effects on plant diversity, the global distribution of G200 ecoregions, and current and future (2030) estimates of atmospheric N-deposition rates are then used to identify the risks to plant diversity in all major ecosystem types now and in the future. This synthesis paper clearly shows that N accumulation is the main driver of changes to species composition across the whole range of different ecosystem types by driving the competitive interactions that lead to composition change and/or making conditions unfavorable for some species. Other effects such its direct toxicity of nitrogen gases and aerosols long-term negative effects of increased ammonium and ammonia availability, soil-mediated effects of acidification, and secondary stress and disturbance are more ecosystem, and site-specific and often play a supporting role. N deposition effects in mediterranean ecosystems have now been identified, leading to a first estimate of an effect threshold. Importantly, ecosystems thought of as not N limited, such as tropical and subtropical systems, may be more vulnerable in the regeneration phase. in situations where heterogeneity in N availability is reduced by atmospheric N deposition, on sandy soils, or in montane areas. Critical loads are effect thresholds for N deposition. and the critical load concept has helped European governments make progress toward reducing N loads on sensitive ecosystems. More needs to be done in Europe and North America. especially for the more sensitive ecosystem types. including several ecosystems of high conservation importance. The results of this assessment Show that the Vulnerable regions outside Europe and North America which have not received enough attention are ecoregions in eastern and Southern Asia (China, India), an important part of the mediterranean ecoregion (California, southern Europe). and in the coming decades several subtropical and tropical parts of Latin America and Africa. Reductions in plant diversity by increased atmospheric N deposition may be more widespread than first thought, and more targeted Studies are required in low background areas, especially in the G200 ecoregions

The importance of spawning behavior in understanding the vulnerability of exploited marine fishes in the U.S. Gulf of Mexico

The vulnerability of a fish stock to becoming overfished is dependent upon biological traits that influence productivity and external factors that determine susceptibility or exposure to fishing effort. While a suite of life history traits are traditionally incorporated into management efforts due to their direct association with vulnerability to overfishing, spawning behavioral traits are seldom considered. We synthesized the existing biological and fisheries information of 28 fish stocks in the U.S. Gulf of Mexico to investigate relationships between life history traits, spawning behavioral traits, management regulations, and vulnerability to fishing during the spawning season. Our results showed that spawning behavioral traits were not correlated with life history traits but improved identification of species that have been historically overfished. Species varied widely in their intrinsic vulnerability to fishing during spawning in association with a broad range of behavioral strategies. Extrinsic vulnerability was high for nearly all species due to exposure to fishing during the spawning season and few management measures in place to protect spawning fish. Similarly, several species with the highest vulnerability scores were historically overfished in association with spawning aggregations. The most vulnerable species included several stocks that have not been assessed and should be prioritized for further research and monitoring. Collectively, the results of this study illustrate that spawning behavior is a distinct aspect of fish ecology that is important to consider for predictions of vulnerability and resilience to fisheries exploitation

Особливості перебігу та корекції артеріальної гіпертензії у хворих з супутньою вегетативною дисфункцією на курорті Трускавець

Частота синдрома вегетативной дисфункции у больных гипертонией составляет 60-70%, что существенно усложняет течение заболевания и ухудшает качество жизни пациентов. Больным гипертонией с признаками симпатикотонии целесообразно назначать бета-блокатор Корвазан и биологически активную воду Нафтуся, так так они существенно снижают частоту вегето-сосудистых кризов. Билогически активная вода Нафтуся содействует уменьшению количеству автономных нарушений и более быстрому достижению целевых уровней артериального давления

Роль військових у формуванні євроатлантичної політики України

7 квітня 2009 року на базі Чернігівського центру євроатлантичної інтеграції відбувся інтерактивний семінар на тему: «Роль військових у формуванні євроатлантичної політики України». Захід провів Інститут трансформації суспільства (Київ, директор - Олег Соскін) спільно із Чернігівським державним педагогічним університетом їм. Т.Г. Шевченка за підтримки Посольства Словацької Республіки в Україні.

Засади транскрибування китайської лексики українською мовою

Статтю присвячено проблемі уніфікації написання китайських географічних назв, власних імен та реалій українською мовою. Основним об’єктом дослідження є здатність української мови відтворювати китайські звуки. У статті розглянуто досвід транскрибування китайських слів засобами латинської та кириличної графіки, що важливо для формулювання основних принципів транскрипції з китайської на українську мову. Таких принципів у статті виділено чотири та розглянуто труднощі, які виникають під час їх застосування в процесі транскрибування. Відзначено, що ці труднощі можуть виявлятися або на рівні складу, або на рівні слова. Для вирішення проблем першого рівня, автор додає до статті таблицю складів-відповідників для китайської та української мов. А для уніфікації написання на другому рівні автор пропонує використовувати апостроф у випадку необхідності позначити межі складу, та відмінювати китайській імена й прізвища згідно норм української мови.Статья посвящается проблеме унификации написаний китайских географических названий, имен собственных и реалий в украинских текстах. Основным объектом исследования является способность украинского языка отображать китайские звуки. В статье рассматривается опыт транскрибирования китайских слов средствами латинской графики и кириллицы, что важно для формулирования основных принципов транскрипции с китайского языка на украинский. Таких принципов в статье выделено четыре, к тому же рассмотрены трудности, которые могут возникнуть при их применении в процессе транскрибирования. Отмечено, что эти трудности могут проявляться либо на уровне слога, либо на уровне слова. Для решения проблем первого уровня, автор прилагает к статье таблицу слоговых соответствий в китайском и украинском языках. А для унификации написаний на втором уровне, автор предлагает использовать апостроф в случае необходимости обозначить границы слогов, и склонять китайские имена и фамилии согласно нормам украинского языка.The article is devoted to the problem of unifying the ways to represent Chinese geographic names, persons’ names and cultural words in Ukrainian texts. The main object of the study is a capacity of Ukrainian language to reproduce Chinese sounds. It is proposed to consider an experience of transcription from Chinese into languages with Latin and Cyrillic alphabets, which is important to formulate main principles for the transcription from Chinese into Ukrainian. There are four main principles stated in the article for this pair of languages. It is also analyzed main difficulties, which occur in practice of using the transcription, based on these principles. The difficulties are divided into two groups: occurred on the level of syllable and occurred on the level of word. To solve problems on the former level, the author complicate the article with tables of Chinese syllables and there equivalents in Ukrainian. To unify writing on the latter level, the author proposes to use apostrophe if important to mark syllable bounds and change a word’s ending in Ukrainian texts according to the norms of Ukrainian grammar

Data assimilation of CrIS NH3 satellite observations for improving spatiotemporal NH3 distributions in LOTOS-EUROS

Atmospheric levels of ammonia (NH3) have substantially increased during the last century, posing a hazard to both human health and environmental quality. The atmospheric budget of NH3, however, is still highly uncertain due to an overall lack of observations. Satellite observations of atmospheric NH3 may help us in the current observational and knowledge gaps. Recent observations of the Cross-track Infrared Sounder (CrIS) provide us with daily, global distributions of NH3. In this study, the CrIS NH3 product is assimilated into the LOTOS-EUROS chemistry transport model using two different methods aimed at improving the modeled spatiotemporal NH3 distributions. In the first method NH3 surface concentrations from CrIS are used to fit spatially varying NH3 emission time factors to redistribute model input NH3 emissions over the year. The second method uses the CrIS NH3 profile to adjust the NH3 emissions using a local ensemble transform Kalman filter (LETKF) in a top-down approach. The two methods are tested separately and combined, focusing on a region in western Europe (Germany, Belgium and the Netherlands). In this region, the mean CrIS NH3 total columns were up to a factor 2 higher than the simulated NH3 columns between 2014 and 2018, which, after assimilating the CrIS NH3 columns using the LETKF algorithm, led to an increase in the total NH3 emissions of up to approximately 30 %. Our results illustrate that CrIS NH3 observations can be used successfully to estimate spatially variable NH3 time factors and improve NH3 emission distributions temporally, especially in spring (March to May). Moreover, the use of the CrIS-based NH3 time factors resulted in an improved comparison with the onset and duration of the NH3 spring peak observed at observation sites at hourly resolution in the Netherlands. Assimilation of the CrIS NH3 columns with the LETKF algorithm is mainly advantageous for improving the spatial concentration distribution of the modeled NH3 fields. Compared to in situ observations, a combination of both methods led to the most significant improvements in modeled monthly NH3 surface concentration and NH4+ wet deposition fields, illustrating the usefulness of the CrIS NH3 products to improve the temporal representativity of the model and better constrain the budget in agricultural areas.Environmental Biolog

How can we possibly resolve the planet's nitrogen dilemma?

Nitrogen is the most crucial element in the production of nutritious feeds and foods. The production of reactive nitrogen by means of fossil fuel has thus far been able to guarantee the protein supply for the world population. Yet, the production and massive use of fertilizer nitrogen constitute a major threat in terms of environmental health and sustainability. It is crucial to promote consumer acceptance and awareness towards proteins produced by highly effective microorganisms, and their potential to replace proteins obtained with poor nitrogen efficiencies from plants and animals. The fact that reactive fertilizer nitrogen, produced by the Haber Bosch process, consumes a significant amount of fossil fuel worldwide is of concern. Moreover, recently, the prices of fossil fuels have increased the cost of reactive nitrogen by a factor of 3 to 5 times, while international policies are fostering the transition towards a more sustainable agro-ecology by reducing mineral fertilizers inputs and increasing organic farming. The combination of these pressures and challenges opens opportunities to use the reactive nitrogen nutrient more carefully. Time has come to effectively recover used nitrogen from secondary resources and to upgrade it to a legal status of fertilizer. Organic nitrogen is a slow-release fertilizer, it has a factor of 2.5 or higher economic value per unit nitrogen as fertilizer and thus adequate technologies to produce it, for instance by implementing photobiological processes, are promising. Finally, it appears wise to start the integration in our overall feed and food supply chains of the exceptional potential of biological nitrogen fixation. Nitrogen produced by the nitrogenase enzyme, either in the soil or in novel biotechnology reactor systems, deserves to have a ‘renaissance’ in the context of planetary governance in general and the increasing number of people who desire to be fed in a sustainable way in particular