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Genetic diversity is one of the measures of biodiversity and has consequences in biological variation. It is crucial to understand the evolutionary and adaptative processes in all living species. This book is an interdisciplinary and integrated work that will contribute to the knowledge of academics from different areas of biological sciences. This collection of scientific papers was chosen and analyzed to offer readers a broad and integrated view of the importance of genetic diversity in the evolution and adaptation of living beings, as well as practical applications of the information needed to analyze this diversity in different organisms. This book was edited by geneticist researchers and provides academics with up-to-date and quality information on the subject.

Variation (Biology)

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What factors influence the choice between alternative grammatical structures such as the following: a lit / a lighted cigarette, more full / fuller of convincing arguments, the main thesis of the book / the book's main thesis, take hostage a group of 15 holiday makers / take a group of 15 holidaymakers hostage, conceding that the argument is convincing / conceding the argument to be convincing? This is the central issue explored in this volume, which contains a unique selection of innovative in-depth empirical studies written in a broadly functional framework. The factors investigated include the following: phonological influences (such as the principle of rhythmic alternation and optimal syllable structure), frequency, pervasive semantic and pragmatic aspects (including iconicity, markedness, grammaticalization and typological tendencies), information structure, processing complexity and horror aequi (the avoidance of identity effects).

English language --- Grammar --- Grammar. --- Variation. --- Variation

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In 1991, William Croft suggested that negative existentials (typically lexical expressions that mean 'not exist, not have') are one possible source for negation markers and gave his hypothesis the name Negative Existential Cycle (NEC). It is a variationist model based on cross-linguistic data. For a good twenty years following its formulation, it was cited at face-value without ever having been tested by (historical)-comparative data. Over the last decade, Ljuba Veselinova has worked on testing the model in a comparative perspective, and this edited volume further expands on her work. The collection presented here features detailed studies of several language families such as Bantu, Chadic and Indo-European. A number of articles focus on the micro-variation and attested historical developments within smaller groups and clusters such as Arabic, Mandarin and Cantonese, and Nanaic. Finally, variation and historical developments in specific languages are discussed for Ancient Hebrew, Ancient Egyptian, Moksha-Mordvin (Uralic), Bashkir (Turkic), Kalmyk (Mongolic), three Pama-Nyungan languages, O'dam (Southern Uto-Aztecan) and Tacana (Takanan, Amazonian Bolivia). The book is concluded by two chapters devoted to modeling cyclical processes in language change from different theoretical perspectives. Key notions discussed throughout the book include affirmative and negative existential constructions, the expansion of the latter into verbal negation, and subsequently from more specific to more general markers of negation. Nominalizations as well as the uses of negative existentials as standalone negative answers figure among the most frequent pathways whereby negative existentials evolve as general negation markers. The operation of the Negative Existential Cycle appears partly genealogically conditioned, as the cycle is found to iterate regularly within some families but never starts in others, as is the case in Bantu. In addition, other special negation markers such as nominal negators are found to undergo similar processes, i.e. they expand into the verbal domain and thereby develop into more general negation markers. The book provides rich information on a specific path of the evolution of negation, on cyclical processes in language change, and it show-cases the historical-comparative method in a modern setting.

Language and languages --- Variation

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"The English language as spoken in Namibia has virtually been overlooked in most textbooks, handbooks, and surveys of varieties of English around the world, or else has only been mentioned in passing. However, this variety of English has recently attracted the attention of several researchers and the present volume brings together most scholars actively involved in the research on English in Namibia from various linguistic fields to present their current research. It covers a wide range of linguistic issues, such as empirical analyses on various levels of linguistic description and use, as well as the application of diverse methodologies, from questionnaire surveys, sociolinguistic interviews and focus group discussions, to corpus linguistics, linguistic landscaping, and digital ethnography. Hence, this book represents the first comprehensive collection of articles and in-depth discussions of this new emerging variety, which contribute to putting this variety on the map of World Englishes but also to advancing general debates in the World Englishes paradigm"--

English language --- Variation

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Spanish language --- Variation --- Dialects