Libros sobre el tema "Extent of niche achieved"

Neurobiology of Monotremes brings together current information on the development, structure, function and behavioural ecology of the monotremes. The monotremes are an unusual and evolutionarily important group of mammals showing striking behavioural and physiological adaptations to their niches. They are the only mammals exhibiting electroreception (in the trigeminal sensory pathways) and the echidna shows distinctive olfactory specialisations. The authors aim to close the current gap in knowledge between the genes and developmental biology of monotremes on the one hand, and the adult structure, function and ecology of monotremes on the other. They explore how the sequence 'embryonic structure › adult structure › behaviour' is achieved in monotremes and how this differs from other mammals. The work also combines a detailed review of the neurobiology of monotremes with photographic and diagrammatic atlases of the sectioned adult brains and peripheral nervous system of the short-beaked echidna and platypus. Pairing of a detailed review of the field with the first published brain atlases of two of the three living monotremes will allow the reader to immediately relate key points in the text to features in the atlases and will extend a universal system of brain nomenclature developed in eutherian brain atlases by G Paxinos and colleagues to monotremes.

This chapter offers a bird’s-eye view of the 100 years of debate that followed upon Regiomontanus’s death and culminated in the Gregorian Reform of 1582, focusing in particular on the time of the Fifth Lateran Council (1512–17) and the work carried out in the 1570s by a commission of experts convened by Pope Gregory XIII, which came to favour an intricate scheme for an astronomically accurate and freely adjustable calendar. Some attention is paid to the extent to which Copernican heliocentric astronomy may have influenced, or was influenced by, the ongoing discussions surrounding the calendar reform. At the same time, the key argument of this chapter is that the breakthrough achieved in the sixteenth century rested to a very large extent on premises, concepts, and insights first formulated during the preceding medieval centuries.

Sinonasal malignancies are rare, pathologically diverse, and biologically unpredictable tumors. They tend to have minimal or nonspecific symptoms that mimic benign (inflammatory) disease until there is invasion of adjacent structures. Most patients present with advanced disease. Computed tomography and magnetic resonance imaging are complimentary studies but magnetic resonance imaging optimally defines the tumor’s extent and dictates the need for neurosurgical attention. Advanced endoscopic techniques allow for the resection of some well-selected tumors as part of a multimodal treatment plan. The intimate relationships with the orbit and brain make surgical management challenging. Optimal patient outcomes can only be achieved with carefully constructed, multidisciplinary, multimodal management paradigms.

The fourth chapter describes the extent to which Augustine as well as a broad group of early modern homilists and poets were influenced by the ontological conception of love described in John’s First Epistle: “God is love, and hee that dwelleth in love, dwelleth in God, and God in him” (1 John 4: 16). For John, responsive love expressed toward God is achieved fundamentally through an embrace of Christ’s Word, particularly because God’s love for Christ is expressed eternally for the Son prior to the Incarnation. This chapter addresses the unique ways in which three early modern English poets—George Herbert, Henry Vaughan, and Thomas Traherne—appropriate the Johannine understanding of agape and an ontological conception of God’s love.

The chapter moves the analysis to the realm of distributive justice. It explores whether inherent to the climate change and people movement nexus are issues of unequal distribution, for example, of benefits and burdens. The chapter outlines distributional issues and then suggests whether, from a distributive justice standpoint, equity could be achieved through redistribution of costs which may accrue for those under pressure to move. The chapter sketches the extent to which international law is underpinned by distributive justice notions. It then, more explicitly, turns to international environmental law, and in particular the international climate change adaptation and finance architectures, to analyse whether, in combination, they support remedying distributional issues in relation to people movement in the climate change context.

This chapter brings together the findings from the ten individual country case-study chapters to highlight the lessons to be learned about inequality and living standards. It highlights the extent to which countries facing what might be thought of as common drivers in terms of globalization and technological change none the less had very different outcomes in terms of increases in inequality and real income growth. This variation did not align neatly with pre-existing welfare-state regimes or economic models, but some common elements can be identified in countries or periods where increases in inequality were limited, and ones where significant real income increases were achieved. The chapter brings out the implications in terms of macroeconomic policy, employment, wage-setting, and labour-market institutions and policies, and redistributive mechanisms as well as broader social provision and supports.

This chapter evaluates the reconciliation process in terms of its inherent promise of social inclusion and fairness in South Africa. It first asks whether the constitutional process could be judged to have been inclusive and fair to all. Then it asks whether the TRC failed to address social justice and thereby constituted a setback to the reconciliation agenda. Finally, the chapter asks about the measure of inclusivity and fairness that have been achieved after some twenty years. The discussion concludes that inclusivity and fairness were not sacrificed at the time when reconciliation shaped the political transition but were compromised more recently, to the extent that inclusion across social divides failed to materialize and political leaders deviated from serving the common good. Just as early reconciliation efforts initially flourished through leadership, so in later years, reconciliation has floundered in its absence.

Derivation serves two purposes: to create a new sign, and to connect signs. This is manifested to the extent to which properties are inherited from the base. Illustrating with Russian nominals we show how the two goals are more or less achieved, in the full range of derivational possibilities. The extremes are represented by category-changing derivation and head-marked category-preserving derivation, manifested by their differences in default inheritance behaviours. The two goals are in an inverse relationship: the non-canonical situation with regard to one of them corresponds to the canonical with regard to the other. Representing the canonical in terms of default inheritance is therefore less straightforward in this arena than in others. We conclude that a symbolic sign, the currency of natural language, requires both distinctness and connectedness, and therefore has two levels of canonicity which act against each other.

Many infections are caused by enteric bacilli, presumably from endogenous origin. Selective decontamination of the digestive tract (SDD) was developed to selectively eliminate the aerobic Gram-negative bacilli from the digestive tract, leaving the anaerobic flora unaffected. As an alternative to SDD, investigators have evaluated the effects of selective oropharyngeal decontamination (SOpD) alone. Most detailed data on the effects of SDD and SOpD in ICU-patients come from two studies performed in Dutch ICUs. The Dutch studies provide strong evidence that SDD and SOpD reduce ICUmortality, ICU-acquired bacteraemia with Gram-negative bacteria, and systemic antibiotic use. Although successful application has been reported from several solitary ICUs across Europe, it is currently unknown to what extent these effects can be achieved in settings with different bacterial ecology. More studies are needed on the use of SDD or SOpD as a measure to control outbreaks with multidrug resistant bacteria.

This chapter examines the extent to which social justice in America has progressed since the Civil Rights Act of 1964 from an organizational psychology perspective. In particular, it evaluates the Civil Rights Act of 1964 in relation to the progress Blacks have and have not made in the last five decades. It first considers the progress brought by the civil rights movement and the Civil Rights Act of 1964 based on attitudinal data and employment statistics. It then reviews the literature on organizational psychology and social justice, suggesting that America has achieved much when it comes to social justice but still has a long way to go. It proposes what an organizational psychologist’s social justice research agenda should look like, with emphasis on the need to more fully recognize the roles played by stereotypes and prejudices in employment discrimination. The article concludes with a few personal observations from the author.

This chapter argues that the case of Rajpura provides insights into the causes and trajectory of India’s “land wars” and their implications for development. It suggests that the exclusionary trajectory of capitalism in contemporary India is the structural underpinning of farmer protests and explains why the political stability of India’s neoliberal regime of dispossession rests on its ability to substitute land prices for inclusive development. However, even an ostensibly “pro-farmer” overhaul of India’s Land Acquisition Act will be inadequate to generalize the compliance achieved in Rajpura, especially where agricultural profitability and dependence are higher, inequalities are more muted, and histories of peasant activism are more militant. “Land wars” are a symptom of dispossession without development and will not disappear without a major redirection of India’s political economy. To the extent that they can foster this redirection, anti-dispossession movements are agents of—rather than obstacles to—development.

Crises are not a new phenomenon in the context of European integration. Additional integration steps could often only be achieved under the pressure of crises. At present, however, the EU is characterised by multiple crises, so that the integration process as a whole is sometimes being questioned. In 2015, the crisis in the eurozone had escalated to such an extent that for the first time a member state was threatened to leave the eurozone. Furthermore, the massive influx of refugees into the EU has revealed the shortcomings of the Schengen area and the common asylum policy. Finally, with the majority vote of the British in the referendum of 23 June 2016 in favour of the Brexit, the withdrawal of a member state became a reality for the first time. Even in the words of the European Commission, the EU has reached a crossroads. Against this background, the twelfth Network Europe conference included talks on the numerous challenges and future integration scenarios in Europe.

This fourth edition of Law of the European Convention on Human Rights builds on the great strengths of earlier editions. An up-to-date account of Strasbourg case law and its underlying principles, this title facilitates an understanding of this key area of law. It explores the extent of the Convention’s influence upon the legal development of the contracting states, and reveals exactly how such a considerable impact has been achieved and maintained. It sets out and critically analyses the Strasbourg jurisprudence on each Convention article that constitutes the substantive guarantee, and examines the system of supervision. The Convention has effectively become the constitutional bill of rights for Europe, providing common human rights standards for the whole continent. National parliaments and courts must constantly look to the Convention when legislating and deciding cases, or run the risk of adverse Strasbourg judgments with which they must then comply. For all states, the Convention has been made enforceable in their national courts.

The Psychology of Property Law considers how research in psychology offers new perspectives on property rules and doctrines, and suggests avenues of reform. The book explains how assumptions about human judgment, decision making, and behavior have shaped different property laws and examines to what extent these assumptions are supported by the research. Employing key findings from psychology, the book considers whether property law’s goals and justifications for various property doctrines could be achieved more successfully with different rules. In addition, the book highlights property laws and conflicts that offer productive areas for further behaviorally informed research. The book critically addresses several topics from property law for which psychology has a great deal to contribute. These include ownership and possession, legal protections for residential and personal property, takings of property by the state, redistribution through property law, real estate transactions, and discrimination in housing and land use. Turning to remedies, the book discusses how psychology can inform legal debates over the desirability of property rules versus liability rules, and in-kind remedies versus monetary ones.

The Green Revolution resulted in spectacular advancements in Indian agriculture. Having achieved food security for its citizens, the country has now become a net exporter of different agricultural commodities. But sadly, this does not reflect the real state of the Indian agricultural sector. In truth, our farmers are plagued by crop failures, poor income, and indebtedness. Such is their misery that they are of late driven to commit suicide. In this book, the author identifies poor returns from crop cultivation as the root cause of farmers’ problems. Using vast temporal and spatial data, the author explores further and attempts to address some very pertinent questions facing Indian agriculture today: What is the current trend in farm income? Are the returns from irrigated crops better than un-irrigated crops? Does increased productivity guarantee increased income? Has the agricultural price policy benefitted farmers? To what extent does rural infrastructure development help in increasing farm income? Has the rural employment guarantee scheme affected farm profitability? The answers will help us determine if we can double farm income by 2022–3, a target set by the present union government.

This book challenges the common assumption that little or nothing of scientific value was achieved during the Burke and Wills expedition. The Royal Society of Victoria initiated the Victorian Exploring Expedition as a serious scientific exploration of hitherto unexplored regions of inland and northern Australia. Members of the expedition were issued with detailed instructions on scientific measurements and observations to be carried out, covering about a dozen areas of science. The tragic ending of the expedition meant that most of the results of the scientific investigations were not reported or published. Burke and Wills: The Scientific Legacy of the Victorian Exploring Expedition rectifies this historic omission. It includes the original instructions as well as numerous paintings and drawings, documents the actual science undertaken as recorded in notebooks and diaries, and analyses the outcomes. It reveals for the first time the true extent and limits of the scientific achievements of both the Burke and Wills expedition and the various relief expeditions which followed. Importantly, this new book has led to a re-appraisal of the shortcomings and the successes of the journey. It will be a compelling read for all those interested in the history of exploration, science and natural history, as well as Australian history and heritage.

TV shows that retain their popularity over the years do so for obvious reasons: good production values, good acting, and compelling storylines. But detective stories in particular also endure because they appeal to the gumshoe in all of us. America is obsessed with crime solving. Nancy Grace on CNN Headline News, Greta Van Susteren on Fox, and the seemingly annual recurrence of the courtroom sensation all testify to this fact. And these people and cases are able to reach their phenomenal status not simply because of the media-the media only demonstrates the enormous national appetite for this material. Rather, Cold Case, CSI, and Law & Order have achieved their current popularity because they all respond to the same national craving for crime, and do so with great skill and creativity. Round Up the Usual Suspects provides a comparison of the crime fighting models and justice proceedings of each of these TV series. Each series has its own special crime-fighting niche, and each approaches its job with a different set of values and different paradigms of discovery and proof. Their separate approaches are each firmly grounded in different components of human nature — analytical reasoning, for instance, in CSI, memory in Cold Case, and teamwork in Law & Order. After examining each of the individual series in depth, Ruble goes on to investigate some of the historical antecedents in classical TV detective series such as The FBI and Dragnet. It is interesting to note that these crime fighting methodologies are extensions of the way we all process information about the world. Ray Ruble here aims to increase our appreciation for the ingenious manner in which fictional cases are broken and convictions convincingly secured, and also illuminates the deeper human elements that lie under a more implicit spotlight in these runaway hits.

As current events around the world have illustrated, epistemological issues are at the center of our political lives. It has become increasingly difficult to discern legitimate sources of evidence, misinformation spreads faster than ever, and the role of truth in politics has allegedly decayed in recent years. It is therefore no coincidence that political discourse is currently saturated with epistemic notions like “post-truth,” “fake news,” “truth decay,” “echo chambers,” and “alternative facts.” This book brings together leading political philosophers and epistemologists to explore ways in which the analytic and conceptual tools of epistemology bear on political philosophy, and vice versa. It is organized around three broad themes: truth and knowledge in politics; epistemic problems for democracy; and disagreement and polarization. This book investigates topics such as: the extent and implications of political ignorance, the value of democratic deliberation, the significance of epistemic considerations for political legitimacy, the epistemology of political disagreement, identity politics, political bullshit, and weaponized skepticism. A premise underlying the development of political epistemology is that, beyond a certain point, progress on certain foundational issues in both political philosophy and epistemology cannot be achieved without sharing insights across fields. By bringing political philosophers into conversation with epistemologists, this volume promotes more cross-pollination of ideas while also highlighting the richness and diversity of political epistemology as a newly emerging field.

The book provides rule-by-rule commentaries on European contract law (general contract law, consumer contract law, the law of sale and related services), dealing with its modern manifestations as well as its historical and comparative foundations. After the collapse of the European Commission's plans to codify European contract law it is timely to reflect on what has been achieved over the past three to four decades, and for an assessment of the current situation. In particular, the production of a bewildering number of reference texts has contributed to a complex picture of European contract laws rather than a European contract law. The present book adopts a broad perspective and an integrative approach. All relevant reference texts (from the CISG to the Draft Common European Sales Law) are critically examined and compared with each other. As far as the acquis commun (ie the traditional private law as laid down in the national codifications) is concerned, the Principles of European Contract Law have been chosen as a point of departure. The rules contained in that document have, however, been complemented with some chapters, sections, and individual provisions drawn from other sources, primarily in order to account for the quickly growing acquis communautaire in the field of consumer contract law. In addition, the book ties the discussion concerning the reference texts back to the pertinent historical and comparative background; and it thus investigates whether, and to what extent, these texts can be taken to be genuinely European in nature, ie to constitute a manifestation of a common core of European contract law. Where this is not the case, the question is asked whether, and for what reasons, they should be seen as points of departure for the further development of European contract law.

Sicker examines the role of the United States within the Western Hemisphere and the geopolitical and geostrategic factors that have helped shape its policies in the region. He demonstrates that such factors have contributed heavily to establishing the patterns of state development and interstate relations in the Western Hemisphere throughout its modern history. The prevailing geopolitical environment has been conditioned to a large extent by the emergence of the United States as the unquestionably dominant power in the extensive region. However, that status did not exist at the time it achieved its independence. It was brought about through almost incessant conflict with, and expansion at the expense of, other states, nations, and peoples over more than a century. As a result, the concerns and interests of the dominant power became and remain, of necessity, factors that states beyond the borders of the United States must take into consideration when pursuing their own national interests and policies. As Sicker amply demonstrates, failure to do so will often produce undesirable consequences for the offending state. As is clear, however, the states of the hemisphere have their own geopolitical interests and concerns independent of, and sometimes conflicting with, those of the United States. As Sicker shows throughout the volume, and especially in his analysis of inter-American conflicts, many of the nations of Latin America have unresolved territorial controversies with their neighbors that date to their origins as independent states. Because of this troubled geopolitical legacy, there have been numerous conflicts among the states of Latin America, some of which the United States has attempted to mediate or arbitrate, and some that seem impervious to a permanent negotiated settlement. This is a provocative analysis that will be of interest to scholars, students, researchers, and policymakers involved with inter-American relations and U.S. diplomacy.

With the end of the 20th century, Dixon and Scheurell decided it was an opportune time to critically assess what governments have achieved with their plethora of public social welfare policies. While Marxist socialists, democratic socialists, social democrats, and reluctant collectivists were all eager, at various times, to construct their vision of the ideal society, the idea of state welfare was slow to take root. As Dixon and Scheurell point out, at the turn of the century, only a handful of industrializing countries were willing to grapple with the problems of poverty, inequality, and social exclusion. Two world wars and the Great Depression of the 1930s, however, sensitized many societies to the human, social, and even political costs of un-met social welfare needs. Thus, the milieu needed for the birth of state welfare came into existence, first in Western Europe, then in Australasia, followed by North and South America and, finally, in parts of the Middle East, Asia, and Africa. The state welfare dream was that citizenship would guarantee every individual a secure lifestyle, with a minimum degree of insecurity, and the wherewithal to develop to the greatest possible extent as individuals and as members of society. It is, Dixon and Scheurell argue, the most significant set of social institutions developed in the 20th century. Admittedly, it is one that had within it the seeds of its own potential destruction—the vicious circle of growing welfare dependency, increasing state control, deepening poverty, and the emergence of an intractable underclass—that has legitimized calls for the individualization of the social. Undoubtedly, this collection of essays on key states, charting the rise and fall of state welfare, examines a monumental 20th century event and will be of interest to scholars, researchers, and students involved with social welfare issues, as well as policy makers and concerned citizens.

Horseradish roots, due to the content of many valuable nutrients and substances with healing and pro-health properties, are used more and more in medicine, food industry and cosmetics. In Poland, the cultivation of horseradish is considered minor crops. In addition, its limited size causes horseradish producers to encounter a number of unresolved agrotechnical problems. Infectious diseases developing on the leaves and roots during the long growing season reduce the size and quality of root crops. The small range of protection products intended for use in the cultivation of horseradish generates further serious environmental problems (immunization of pathogens, low effectiveness, deterioration of the quality of raw materials intended for industry, destruction of beneficial organisms and biodiversity). In order to meet the problems encountered by horseradish producers and taking into account the lack of data on: yielding, occurrence of infectious diseases and the possibility of combating them with methods alternative to chemical ones in the years 2012–2015, rigorous experiments have been carried out. The paper compares the impact of chemical protection and its reduced variants with biological protection on: total yield of horseradish roots and its structure. The intensification of infectious diseases on horseradish leaves and roots was analyzed extensively. Correlations were examined between individual disease entities and total yield and separated root fractions. A very important and innovative part of the work was to learn about the microbial communities involved in the epidemiology of Verticillium wilt of horseradish roots. The effect was examined of treatment of horseradish cuttings with a biological preparation (Pythium oligandrum), a chemical preparation (thiophanate-methyl), and the Kelpak SL biostimulator (auxins and cytokinins from the Ecklonia maxima algae) on the quantitative and qualitative changes occurring in the communities of these microorganisms. The affiliation of species to groups of frequencies was arranged hierarchically, and the biodiversity of these communities was expressed by the following indicators: Simpson index, Shannon–Wiener index, Shannon evenness index and species richness index. Correlations were assessed between the number of communities, indicators of their biodiversity and intensification of Verticillium wilt of horseradish roots. It was shown that the total yield of horseradish roots was on average 126 dt · ha–1. Within its structure, the main root was 56%, whereas the fraction of lateral roots (cuttings) with a length of more than 20 cm accounted for 26%, and those shorter than 20 cm for 12%, with unprofitable yield (waste) of 6%. In the years with higher humidity, the total root yield was higher than in the dry seasons by around 51 dt · ha–1 on average. On the other hand, the applied protection treatments significantly increased the total yield of horseradish roots from 4,6 to 45,3 dt · ha–1 and the share of fractions of more than 30 cm therein. Higher yielding effects were obtained in variants with a reduced amount of foliar application of fungicides at the expense of introducing biopreparations and biostimulators (R1, R2, R3) and in chemical protection (Ch) than in biological protection (B1, B2) and with the limitation of treatments only to the treatment of cuttings. The largest increments can be expected after treating the seedlings with Topsin M 500 SC and spraying the leaves: 1 × Amistar Opti 480 SC, 1 × Polyversum WP, 1 × Timorex Gold 24 EC and three times with biostimulators (2 × Kelpak SL + 1 × Tytanit). In the perspective of the increasing water deficit, among the biological protection methods, the (B2) variant with the treatment of seedlings with auxins and cytokinins contained in the E. maxima algae extract is more recommended than (B1) involving the use of P. oligandrum spores. White rust was the biggest threat on horseradish plantations, whereas the following occurred to a lesser extent: Phoma leaf spot, Cylindrosporium disease, Alternaria black spot and Verticillium wilt. In turn, on the surface of the roots it was dry root rot and inside – Verticillium wilt of horseradish roots. The best health of the leaves and roots was ensured by full chemical protection (cuttings treatment + 6 foliar applications). A similar effect of protection against Albugo candida and Pyrenopeziza brassicae was achieved in the case of reduced chemical protection to one foliar treatment with synthetic fungicide, two treatments with biological preparations (Polyversum WP and Timorex Gold 24 EC) and three treatments with biostimulators (2 × Kelpak SL, 1 × Tytanit). On the other hand, the level of limitation of root diseases comparable with chemical protection was ensured by its reduced variants R3 and R2, and in the case of dry root rot, also both variants of biological protection. In the dry years, over 60% of the roots showed symptoms of Verticillium wilt, and its main culprits are Verticillium dahliae (37.4%), Globisporangium irregulare (7.2%), Ilyonectria destructans (7.0%), Fusarium acuminatum (6.7%), Rhizoctonia solani (6.0%), Epicoccum nigrum (5.4%), Alternaria brassicae (5.17%). The Kelpak SL biostimulator and the Polyversum WP biological preparation contributed to the increased biodiversity of microbial communities associated with Verticillium wilt of horseradish roots. In turn, along with its increase, the intensification of the disease symptoms decreased. There was a significant correlation between the richness of species in the communities of microbial isolates and the intensification of Verticillium wilt of horseradish roots. Each additional species of microorganism contributed to the reduction of disease intensification by 1,19%.

The aim of the paper was to determine the influence of root systems of chosen tree species found in the Polish Flysch Carpathians on the increase of soil shear strength (root cohesion) in terms of slope stability. The paper's goal was achieved through comprehensive tests on root systems of eight relatively common in the Polish Flysch Carpathians tree species. The tests that were carried out included field work, laboratory work and analytical calculations. As part of the field work, the root area ratio (A IA) of the roots was determined using the method of profiling the walls of the trench at a distance of about 1.0 m from the tree trunk. The width of the. trenches was about 1.0 m, and their depth depended on the ground conditions and ranged from 0.6 to 1.0 m below the ground level. After preparing the walls of the trench, the profile was divided into vertical layers with a height of 0.1 m, within which root diameters were measured. Roots with diameters from 1 to 10 mm were taken into consideration in root area ratio calculations in accordance with the generally accepted methodology for this type of tests. These measurements were made in Biegnik (silver fir), Ropica Polska (silver birch, black locust) and Szymbark (silver birch, European beech, European hornbeam, silver fir, sycamore maple, Scots pine, European spruce) located near Gorlice (The Low Beskids) in areas with unplanned forest management. In case of each tested tree species the samples of roots were taken, transported to the laboratory and then saturated with water for at least one day. Before testing the samples were obtained from the water and stretched in a. tensile testing machine in order to determine their tensile strength and flexibility. In general, over 2200 root samples were tested. The results of tests on root area ratio of root systems and their tensile strength were used to determine the value of increase in shear strength of the soils, called root cohesion. To this purpose a classic Wu-Waldron calculation model was used as well as two types of bundle models, the so called static model (Fiber Bundle Model — FIRM, FBM2, FBM3) and the deformation model (Root Bundle Model— RBM1, RBM2, mRBM1) that differ in terms of the assumptions concerning the way the tensile force is distributed to the roots as well as the range of parameters taken into account during calculations. The stability analysis of 8 landslides in forest areas of Cicikowicleie and Wignickie Foothills was a form of verification of relevance of the obtained calculation results. The results of tests on root area ratio in the profile showed that, as expected, the number of roots in the soil profile and their ApIA values are very variable. It was shown that the values of the root area ratio of the tested tree species with a diameter 1-10 ram are a maximum of 0.8% close to the surface of the ground and they decrease along with the depth reaching the values at least one order of magnitude lower than close to the surface at the depth 0.5-1.0 m below the ground level. Average values of the root area ratio within the soil profile were from 0.05 to 0.13% adequately for Scots pine and European beech. The measured values of the root area ratio are relatively low in relation to the values of this parameter given in literature, which is probably connected with great cohesiveness of the soils and the fact that there were a lot of rock fragments in the soil, where the tests were carried out. Calculation results of the Gale-Grigal function indicate that a distribution of roots in the soil profile is similar for the tested species, apart from the silver fir from Bie§nik and European hornbeam. Considering the number of roots, their distribution in the soil profile and the root area ratio it appears that — considering slope stability — the root systems of European beech and black locust are the most optimal, which coincides with tests results given in literature. The results of tensile strength tests showed that the roots of the tested tree species have different tensile strength. The roots of European beech and European hornbeam had high tensile strength, whereas the roots of conifers and silver birch in deciduous trees — low. The analysis of test results also showed that the roots of the studied tree species are characterized by high variability of mechanical properties. The values Of shear strength increase are mainly related to the number and size (diameter) of the roots in the soil profile as well as their tensile strength and pullout resistance, although they can also result from the used calculation method (calculation model). The tests showed that the distribution of roots in the soil and their tensile strength are characterized by large variability, which allows the conclusion that using typical geotechnical calculations, which take into consideration the role of root systems is exposed to a high risk of overestimating their influence on the soil reinforcement. hence, while determining or assuming the increase in shear strength of soil reinforced with roots (root cohesion) for design calculations, a conservative (careful) approach that includes the most unfavourable values of this parameter should be used. Tests showed that the values of shear strength increase of the soil reinforced with roots calculated using Wu-Waldron model in extreme cases are three times higher than the values calculated using bundle models. In general, the most conservative calculation results of the shear strength increase were obtained using deformation bundle models: RBM2 (RBMw) or mRBM1. RBM2 model considers the variability of strength characteristics of soils described by Weibull survival function and in most cases gives the lowest values of the shear strength increase, which usually constitute 50% of the values of shear strength increase determined using classic Wu-Waldron model. Whereas the second model (mRBM1.) considers averaged values of roots strength parameters as well as the possibility that two main mechanism of destruction of a root bundle - rupture and pulling out - can occur at the same. time. The values of shear strength increase calculated using this model were the lowest in case of beech and hornbeam roots, which had high tensile strength. It indicates that in the surface part of the profile (down to 0.2 m below the ground level), primarily in case of deciduous trees, the main mechanism of failure of the root bundle will be pulling out. However, this model requires the knowledge of a much greater number of geometrical parameters of roots and geotechnical parameters of soil, and additionally it is very sensitive to input data. Therefore, it seems practical to use the RBM2 model to assess the influence of roots on the soil shear strength increase, and in order to obtain safe results of calculations in the surface part of the profile, the Weibull shape coefficient equal to 1.0 can be assumed. On the other hand, the Wu-Waldron model can be used for the initial assessment of the shear strength increase of soil reinforced with roots in the situation, where the deformation properties of the root system and its interaction with the soil are not considered, although the values of the shear strength increase calculated using this model should be corrected and reduced by half. Test results indicate that in terms of slope stability the root systems of beech and hornbeam have the most favourable properties - their maximum effect of soil reinforcement in the profile to the depth of 0.5 m does not usually exceed 30 kPa, and to the depth of 1 m - 20 kPa. The root systems of conifers have the least impact on the slope reinforcement, usually increasing the soil shear strength by less than 5 kPa. These values coincide to a large extent with the range of shear strength increase obtained from the direct shear test as well as results of stability analysis given in literature and carried out as part of this work. The analysis of the literature indicates that the methods of measuring tree's root systems as well as their interpretation are very different, which often limits the possibilities of comparing test results. This indicates the need to systematize this type of tests and for this purpose a root distribution model (RDM) can be used, which can be integrated with any deformation bundle model (RBM). A combination of these two calculation models allows the range of soil reinforcement around trees to be determined and this information might be used in practice, while planning bioengineering procedures in areas exposed to surface mass movements. The functionality of this solution can be increased by considering the dynamics of plant develop¬ment in the calculations. This, however, requires conducting this type of research in order to obtain more data.