Diatoms And Chrysophytes Unravelling Their Mysteries Through Light And Electron Microscopy

This volume of Nova Hedwigia Beihefte includes papers covering a broad range of topics in diatom and chrysophyte research - including historical analyses of taxa names and name changes - through descriptions of novel taxa; observations of fine details of valve and cell morphology and ultrastructure, in many cases in an ecological and/or biostratigraphic context; to attempts at clarifying some hard-to-resolve questions on the evolutionary history of diatoms. Although there is no single common scientific thread connecting all contributions, they are all influenced, in some way, by the work of R. M. Crawford. Some highlight the still substantial extent of undiscovered terrain in the realm of diatom (and microalgal) ultrastructure, regarding variations on the fine construction of both frustules and organic cell components, an area of research in which R. M. Crawford laid important groundwork. Other papers add to our understandingof individual taxonomic groups in which R. M. Crawford raised a heightened interest, such as the genus Corethron which features the most elaborate movements of cell wall parts during cell division in diatoms, or the diverse genera of melosiroid diatoms where the work of R. M. Crawford was instrumental in recognizing the extent of (functional-)morphological and ecological variability. Combining diverse perspectives and methods, this volume will be of interest to researchers of diatoms, chrysophytes and other microalgal groups. The volume is dedicated to Richard M. Crawford, who spent a lifetime researching dinoflagellates and diatoms, particularly their morphology and taxonomy, utilizing various microscopical techniques. He is perhaps best known for his pioneering works on the dinoflagellate genera Oxyrrhis and Woloszynskia, and the centric diatoms, Aulacoseira, Melosira, Ellerbeckia, Paralia, and Corethron. He was one of the contributors to the famous blue book (The Diatoms: Biology & Morphology of the Genera) and was the curator to the Hustedt Diatom Collection in Bremerhaven.

The aim of this new book series (Diatoms: Biology and Applications) is to provide a comprehensive and reliable source of information on diatom biology and applications. The first book of the series, Diatoms Fundamentals & Applications, is wide ranging, starting with the contributions of amateurs and the beauty of diatoms, to details of how their shells are made, how they bend light to their advantage and ours, and major aspects of their biochemistry (photosynthesis and iron metabolism). The book then delves into the ecology of diatoms living in a wide range of habitats, and look at those few that can kill or harm us. The book concludes with a wide range of applications of diatoms, in forensics, manufacturing, medicine, biofuel and agriculture. The contributors are leading international experts on diatoms. This book is for a wide audience researchers, academics, students, and teachers of biology and related disciplines, written to both act as an introduction to diatoms and to present some of the most advanced research on them.

The second revised edition of this manual aims at providing students and less experienced professional aquatic biologists with a key to identify some to the more commonly encountered aquatic freshwater algal genera of the United States. In response to reviewers comments, a brief section on diatoms, a section providing a number of possible of dispositions of the genera into a taxonomic hierarchy and a brief glossary of technical terms have been added in this revised edition. A number of nomenclatural changes is reflected as well.Keys, representative illustrations and general ecological notes are provided for some 300 genera, excluding the diatoms (except for a brief section on them). The keys are based on features observable in freshly collected material.

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This volume focuses on the interaction of lichens with their substrate, environment and their biogeographic effects. In seventeen chapters thirty-eight authors present recent findings and developments in systematics, biodiversity, floristic studies and ecology, as well as newly described taxa, and keys to the identification of Caloplaca and xanthorioid lichens. Molecular phylogenetic analyses of several groups and genera are presented, resulting in an improved systematics of, for example, Caloplaca, Cladonia, Collema and xanthorioid lichens. The genera Arthonia and Usnea in Greece (with key) are reviewed. The volume is dedicated to Prof. Hans Martin Jahns on the occasion of his 70th birthday, featuring papers on some of his favourite fields of research, among them lichen interactions with their substrate and environment and lichen biogeography. A brief biography of Jahns, highlighting his contributions to lichenology, is included in the chapter on the nine Presidents of the International Association for Lichenology. Jahns played an important role during the past 40 years with his highly influential book, co-authored by Aino Henssen, entitled Lichenes. Eine Einführung in die Flechtenkunde. He is well-known for his extensive work and numerous publications on lichen morphology and ontogeny, particularly the development of fruiting bodies in different genera.

Diatom biology, genomics and ecology are becoming more relevant to the human species. While there have been recent compilations of some of the applied aspects of diatoms, and the dizzying pace of taxonomic revisions, this new volume bring us up to date on their classification, biology and ecology, as well as covering the topics of genomics and applied uses. In this collection, some of the leaders in diatom research present either new information or summarize recent research efforts on a wide range of topics, including the tree of life of diatoms, their classifications, the wide habitats and ecological spectra the group exploits, as well as the beauty of their form. This volume celebrates the diversity, emerging areas of research and fascinating ecology of the diatoms bringing this group of world-renown and emerging research leaders together. 'The Diatom World' will foster greater appreciation and research contributions on this incredibly diverse and fascinating group of organisms.

This book brings together the results from over 2000 years of investigations into Greek lichens by workers from many countries. Greece has a rich lichen flora but it is not well known, in large part because previous publications are scattered through a wide, and often obscure, literature. This comprehensive and detailed checklist puts the study of Greek lichens onto a firm foundation, and will be indispensible for any botanist with an interest in Greece. Lichenologists throughout the Balkans and the eastern Mediterranean region will also find it of value.

Algae are an important component of aquatic benthic ecosystems because they reflect the health of their environment through their density, abundance, and diversity. This comprehensive and authoritative text is divided into three sections to offer complete coverage of the discussion in this field. The first section introduces the locations of benthic algae in different ecosystems, like streams, large rivers, lakes, and other aquatic habitats. The second section is devoted to the various factors, both biotic and abiotic, that affect benthic freshwater algae. The final section of the book focuses on the role played by algae in a variety of complex freshwater ecosystems. As concern over environmental health escalates, the keystone and pivotal role played by algae is becoming more apparent. This volume in the Aquatic Ecology Series represents an important compilation of the latest research on the crucial niche occupied by algae in aquatic ecosystems. Presents algae as the important player in relation to environmental health Prepared by leading authorities in the field Includes comprehensive treatment of the functions of benthic algae as well as the factors that affect these important aquatic organisms Acts as an important reference for anyone interested in understanding and managing freshwater ecosystems