The Diatom Genus Neidium Pfitzer (Bacillariophyceae) from Zoige Wetland, China

The Diatom Genus Neidium Pfitzer (Bacillariophyceae) from Zoige Wetland, China PDF

Author: Qi Liu

Publisher:

Published: 2017-01-19

Total Pages: 120

ISBN-13: 9783443570545

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In this volume twenty-three species of Neidium are described. Sample materials were collected in the Zoig� Wetland, an expansive network of lakes and wetlands located in Sichuan Province, China. From the total number of Neidium species reported, sixteen of them are described as new. 281 light microscope and scanning electron microscope photographs document all taxa and illustrate the morphology of these Neidium species. Detailed descriptions for each species are given and the species are compared with other, similar species from other regions of the world. The variability in valve morphology in the genus, including presence and distribution of renilimbi, longitudinal canals, central nodule and striation, are documented. A comprehensive table with morphometric details of all described Neidium species rounds up the volume. This survey of Neidium species almost doubles the number of new Neidium taxa described from China and is of interest for all readers working on diatoms and Bacillariophyceae.

The Diatom Genus Pinnularia from Great Xing'an Mountains, China

The Diatom Genus Pinnularia from Great Xing'an Mountains, China PDF

Author: Y. Liu

Publisher:

Published: 2018-02-23

Total Pages: 298

ISBN-13: 9783443570569

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In this volume diatoms of the genus Pinnularia from the Great Xing'an Mountains (in northeastern China), a very pristine region with a great diversity of habitat types, are described. A total of 89 taxa of the genus Pinnularia were studied and documented in both light and scanning electron microscope images. As a result 19 new species are proposed, and 7 neotypes of taxa of Skvortzow are designated. The diatom genus Pinnularia is notoriously difficult taxonomically, with populations having small numbers and apparently great intraspecific phenotypic variability. P.T. Cleve (1895, p. 72) wrote, "The fresh-water forms pass into one another to a great extent, so that the definition of good or distinct species or groups is a matter of greatest difficulty or almost impossible." One of the parts of the world where the freshwater diatom flora is relatively unknown is China. This work will contribute significantly to our understanding of the diversity of the genus Pinnularia overall, and especially in China.

Diatoms in the Wetlands of Southern Iraq

Diatoms in the Wetlands of Southern Iraq PDF

Author: Adil Y. Al-Handal

Publisher:

Published: 2019-12-10

Total Pages: 252

ISBN-13: 9783443570583

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The authors document the diatom species composition and ecology in the two major water impoundments of Southern Iraq, the Mesopotamian Marshes and Shatt Al-Arab River. Based on light and scanning electron microscopy investigations, 293 taxa are documented, including the description of three new species. The taxa treated herein were collected from a variety of habitats over a period of 15 years. Diatom assemblages consist of a mixture of freshwater, brackish water and marine taxa. Many diatom taxa that have disappeared in recent years are also documented in this volume. One reason for their disappearance is the high salinization of the Mesopotamian Marshes and Shatt Al-Arab River areas resulting from extremely low freshwater discharge from Euphrates and Tigris Rivers which allowed the seawater front to reach these regions. Species belonging to previously recorded genera such as Eunotia and Diatoma are no longer present in this area. Therefore, this work also is a documentary record of the diatom flora of the wetlands of Southern Iraq during the past 15 years and not only provides an insight into the present state of research but preserves records and findings from taxa no longer present in Southern Iraq, due to human driven ecological impacts.

Plagiotropis Pfitzer and Tropidoneis Cleve, a Summary Account

Plagiotropis Pfitzer and Tropidoneis Cleve, a Summary Account PDF

Author: T. B. B. Paddock

Publisher:

Published: 1988

Total Pages: 204

ISBN-13:

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This paper gives an SEM account of the diatom genus Plagiotropis Pfitzer and establishes eight new genera for species removed from Tropidoneis sensu Cleve. Ten new species are secribed. The affinities of the genera are briefly discussed with some reference to the Pleurosigmoid diatoms for which additional illustrations are provided.

River Algae

River Algae PDF

Author: Orlando Necchi JR

Publisher: Springer

Published: 2016-06-02

Total Pages: 279

ISBN-13: 3319319841

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The content is focused on benthic communities showing how they play an in important role in the river ecosystems. Provides also information on taxonomy of river-inhabiting algal groups, including phylogeny, distribution, collection, preservation and description of the most representative genera of algae in river benthic algal communities. The book also approaches the ecology of river algae not to mention the ecological factors influencing abundance, distribution and diversity of river benthic algal communities and their use as bio-indicators, providing an up-to-date information on taxonomy, ecology, methodology and uses, and a great source of research to everyone interested in freshwater algae, limnology, water quality assessment and biodiversity in river ecosystems.

Diatoms

Diatoms PDF

Author: Joseph Seckbach

Publisher: John Wiley & Sons

Published: 2019-07-01

Total Pages: 657

ISBN-13: 1119370728

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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.

Biotic Evolution and Environmental Change in Southeast Asia

Biotic Evolution and Environmental Change in Southeast Asia PDF

Author: David Gower

Publisher: Cambridge University Press

Published: 2012-07-19

Total Pages: 499

ISBN-13: 1139536222

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The flora and fauna of Southeast Asia are exceptionally diverse. The region includes several terrestrial biodiversity hotspots and is the principal global hotspot for marine diversity, but it also faces the most intense challenges of the current global biodiversity crisis. Providing reviews, syntheses and results of the latest research into Southeast Asian earth and organismal history, this book investigates the history, present and future of the fauna and flora of this bio- and geodiverse region. Leading authorities in the field explore key topics including palaeogeography, palaeoclimatology, biogeography, population genetics and conservation biology, illustrating research approaches and themes with spatially, taxonomically and methodologically focused case studies. The volume also presents methodological advances in population genetics and historical biogeography. Exploring the fascinating environmental and biotic histories of Southeast Asia, this is an ideal resource for graduate students and researchers as well as environmental NGOs.

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