Download or read book Variation of the Population Structure of Polygonum Viviparum L in Relation to Certain Environmental Conditions written by and published by Museum Tusculanum Press. This book was released on with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Annual Cycle of Temperature Salinity Currents and Water Masses in Disko Bugt and Adjacent Waters West Greenland written by Ole G. Norden Andersen and published by Museum Tusculanum Press. This book was released on 1981 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lichens from Central East Greenland written by and published by Museum Tusculanum Press. This book was released on with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Annual Cycle of Phytoplankton of Primary Production and Hyrdrography in the Disko Bugt Area West Greenland written by Ole G. Norden Andersen and published by Museum Tusculanum Press. This book was released on 1981 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Population Structure of Vegetation written by J. White and published by Springer Science & Business Media. This book was released on 2013-11-09 with total page 670 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Handbook of Vegetation Science is growing. After the first volumes und er my editorship have appeared the interest of the scientific community has been revived and many new volume editors have started their work. The present volume wasjointly designed by Drs. J. White and W. Beeftink. Due to unforseen developments Dr. White signs now as the sole editor. The development of this volume within the series had a special history as Dr. White pointsout in his preface. Adding to this I need only to state that I found it essential to include the topic of this volume into a Hand book of Vegetation Science. lt was included therefore in my first revised Iist of topics to be included in the Handbook when I took over from Dr. Tüxen. It is a great pleasure for me to see this volume appear. Having read through the many contributions to this volume I can certainly congratu late Drs. White and Beeftink for their success in generating so much interest in this volume among their colleagues. The cooperation on this volume is forme the first sign that the new concept of the Handbook has been understood by the generation of scientists which I have to address. The influence this volume will have on the field ofplant population studies only time can teil. It appears to me, however, that this volume will become a standard resource for some future. Dr. White asked me to have this volume dedicated to Dr. Rabotnov.
Download or read book Global Change and Arctic Terrestrial Ecosystems written by Walter C. Oechel and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt: Global warming is likely to have the greatest impact at high latitudes, making the Arctic an important region both for detecting global climate change and for studying its effects on terrestrial ecosystems. The chapters in this volume address current and anticipated impacts of global climate change on Arctic organisms, populations, ecosystem structure and function, biological diversity, and the atmosphere.
Download or read book Embryology of Flowering Plants Terminology and Concepts Vol 3 written by T B Batygina and published by CRC Press. This book was released on 2019-04-23 with total page 512 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plant embryology, dealing with the regularities of initiation and the first stages of development of an organism, is now flourishing because of the overall progress being made in natural sciences. Such discoveries of the 20th century as production of plants from a single somatic cell, experimental haploidy, and parasexual hybridization were of general biological significance. The combined efforts of embryologists, geneticists and molecular biologists yielded the discovery of specific genes that control meiosis, egg cell development and early stages of embryogenesis. The tendency to synthesize data of embryology and genetics has become increasingly noticeable. It is connected with the fact that the majority of problems connected with morphogenesis, such as differentiation, specialization, the evaluation of features and the definition of the notionsgene and feature andgenotype and phenotype concern embryology and genetics (embryogenetics) in one way or another. Evolutionary embryology has given rise to a new approach to the study of problems of adaptation in plants. In connection with the problem of preserving biological diversity under conditions of ecological stress, special attention is paid to ecological embryology, revealing the critical periods in early ontogenesis and plasticity and tolerance of reproductive systems at the level of species and population. The study of variability of morphogenesis and phenotype in population (life cycle variations and the diversity of reproductive systems) is the most important point in the population embryology of plants.
Download or read book Meddelelser Om Gr nland written by Bent Fredskild and published by Museum Tusculanum Press. This book was released on 1996-12 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phytogeographically and climatically West Greenland includes parts of the low arctic and high arctic areas. The present vegetation and a summary of its history since the last glaciation based on pollen and macrofossil analyses are briefly described. The determination of more than 55,000 herbarium sheets of native phanerogams has been checked. Before preparing the dot maps it was necessary to decide at which level taxonomically difficult genera (eg: Antennaria, Draba, Poa, Puccinellia, and Stellaria would be treated). For all of these the criteria used are given. Dot maps have been prepared for 379 taxa. These maps have been grouped into 11 West Greenland distribution types, which clearly correlate with T W Böcher's biological distribution types (Böcher 1963). The collecting intensity in the large area is rather uneven. This is illustrated by a map giving the number of collections at the 305 localities from which 50 or more collections are at hand. Another map giving the number of taxa at 29 well-investigated localities illustrates the species diversity in the region. Most low arctic localities have more than 130 taxa, with 215 at the richest locality (Godhavn / Qeqertarsuaq on Disko), while the number at no high arctic locality exceeds lS0. Reference to the corresponding numbers in other parts of Greenland is given. Based on the dot maps a new delimitation of West Greenland in floristic provinces and districts is presented. It differs somewhat from that in Grønlands Flora / The Flora of Greenland (Böcher et al. 1957, and later editions). The major alteration is that the boundary between the low and high arctic phytogeographic provinces is now placed through north Disko - Nuussuaq. As a consequence of this the southernmost district in the high arctic is divided into an outer (NWso) and an inner province (NWsi). Minor alterations are suggested in the southern part of West Greenland.
Download or read book Bilogical Monitoring of Airborne Deposition Within and Around the Ilimaussaq Intrusion Southwest Greenland written by and published by Museum Tusculanum Press. This book was released on with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Illustrated Moss Flora of Arctic North America and Greenland written by Gert S. Mogensen and published by Museum Tusculanum Press. This book was released on 1985 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Meddelelser Om Gr nland Bioscience written by and published by . This book was released on 1981 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Excerpta botanica written by and published by . This book was released on 1983 with total page 572 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Meddelelser om Gr nland written by and published by . This book was released on 1981 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Meroplankton in J rgen Br nlund Fjord North Greenland written by Ole G. Norden Andersen and published by . This book was released on 1984 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Canadian Journal of Botany written by and published by . This book was released on 2002 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Fern Gazette written by and published by . This book was released on 1985 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Recent Polar and Glaciological Literature written by and published by . This book was released on 1982 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
