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Author: V. T. Antony
Publisher:
ISBN: 9788184113785
Category : Biodiversity
Languages : en
Pages : 383
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Book Description
Author: V. T. Antony
Publisher:
ISBN: 9788184113785
Category : Biodiversity
Languages : en
Pages : 383
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Book Description
Author: M. P. Singh
Publisher: Daya Books
ISBN: 9788170352891
Category : Science
Languages : en
Pages : 292
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Book Description
The depletion of biodiversity is an alarming problem all over the country. The world conservation strategy suggests that the initial effort of biodiversity conservation should aim at establishment and maintenance of a network of protected area systems by making policy changes involving local people in the protected areas management and mobilising financial resources for their conservation and protection. The problem of biodiversity conservation has become a global issue. It is being realised that forests existing in a country is not a resource just for that country, but for the whole of the world. The Amazoian Rain Forests have been called the Lungs of the World as they serve to purity of the global atmosphere by release of oxygen and absorption of Pollutants. The rate of deforestation is several times higher in the developing countries than the developed countries, as the forests are being felled to generate funds and space for development. The total number of species in the world is estimated to be around 5 to 30 million but of which about 1.4 millions species have been described. The total number of plant species in India is estimated to be about 45,000 (15,000 flowering plants, 64 gymnosperms, 2843 bryopthes, 1042 pteriodophytes, 1940 lichans and 23,000 fungi). Nearly 4900 of those species are endemic to India out of which 1500 are highly threatened (MOEF, 1994). Contents Chapter 1: Plant biodiversity; Chapter 2: Phyto sociological region of india; Chapter 3: Phyto sociological region of the trans-himalaya; Chapter 4: Phyto sociological region of the west himalaya; Chapter 5: Phyto sociological region of the eastern himalaya; Chapter 6: Phyto sociological region of north-east india; Chapter 7: Phyto sociological region of the indian desert; Chapter 8: Phto sociological region of the semi-aridzone; Chapter 9: Phyto sociological region of the gangetic plains; Chapter 10: Phyto sociological region of the western ghats; Chapter 11: Phyto sociological region of the deccan peninsula; Chapter 12: Phyto sociological region of the indian coasts; Chapter 13: Phyto sociological regions of andaman and nicobar islands; Chapter 14: Phyto sociological region of the lakshadeep islands; Chapter 15: Aquatic and wetland vegetation; Chapter 16: Weed and aliens; Chapter 17: Taxonomy: A view; Chapter 18: Angiosperms; Chapter 19: Gymnosperms; Chapter 20: Pteriodophytes; Chapter 21: Bryophytes; Chapter 22: Algae; Chapter 23: Ecology and distribution of the marine forms; Chapter 24: Fungi; Chapter 25: Lichens; Chapter 26: Botanical regions of india and their floristic compositions; Chapter 27: Some alien flowering plants.
Author: M. Ingrouille
Publisher: Springer Science & Business Media
ISBN: 9401123004
Category : Science
Languages : en
Pages : 348
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Book Description
Diversity and Evolution of Land Plants provides a fresh and long overdue treatment of plant anatomy and morphology for the biology undergraduate of today. Setting aside the traditional plod through the plant taxa, the author adopts a problem-based functional approach, exploring plant diversity as a series of different solutions to the design problems facing plant life on land.
Author: Rajesh Tandon
Publisher: Springer Nature
ISBN: 9811542104
Category : Science
Languages : en
Pages : 413
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Book Description
Sexual reproduction is the predominant mode of perpetuation for flowering plant species. Investigating the reproductive strategies of plants has grown to become a vast area of research and, in crop plants, covers events from flowering to fruit and seed development; in wild species, it extends up to seed dispersal and seedling recruitment. Thus, reproduction determines the extent of yield in crop plants and, in wild plants, also determines the efficacy of recruiting new adults to the population, making this field important both from fundamental and applied plant biology perspectives. Moreover, in light of the growing concerns regarding food and nutritional security for the growing population and preserving biological diversity, reproductive biology of flowering plants has acquired special significance. Extensive studies on various facets of reproduction are being carried out around the world. However, these studies are scattered across research journals and reviews from diverse areas of biology. The present volume covers the whole spectrum of reproductive ecology, from phenology and floral biology, to sexuality and pollination biology/ecology including floral rewards, breeding systems, apomixis and seed dispersal. In turn, transgene flow, its biosafety and mitigation approaches, and the ‘global pollinator crisis’, which has become a major international concern in light of the urgent need to sustain crop yield and biodiversity, are discussed in detail. Given its scope, the book offers a valuable resource for students, teachers and researchers of botany, zoology, ecology, agriculture and forestry, as well as conservation biologists.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 76
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Book Description
Author: Lawrence D. Harder
Publisher: OUP Oxford
ISBN: 0191513865
Category : Science
Languages : en
Pages : 400
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Book Description
The reproductive organs and mating biology of angiosperms exhibit greater variety than those of any other group of organisms. Flowers and inflorescences are also the most diverse structures produced by angiosperms, and floral traits provide some of the most compelling examples of evolution by natural selection. Given that flowering plants include roughly 250,000 species, their reproductive diversity will not be explained easily by continued accumulation of case studies of individual species. Instead a more strategic approach is now required, which seeks to identify general principles concerning the role of ecological function in the evolution of reproductive diversity. The Ecology and Evolution of Flowers uses this approach to expose new insights into the functional basis of floral diversity, and presents the very latest theoretical and empirical research on floral evolution. Floral biology is a dynamic and growing area and this book, written by the leading internationally recognized researchers in this field, reviews current progress in understanding the evolution and function of flowers. Chapters contain both new research findings and synthesis. Major sections in turn examine functional aspects of floral traits and sexual systems, the ecological influences on reproductive adaptation, and the role of floral biology in angiosperm diversification. Overall, this integrated treatment illustrates the role of floral function and evolution in the generation of angiosperm biodiversity. This advanced textbook is suitable for graduate level students taking courses in plant ecology, evolution, systematics, biodiversity and conservation. It will also be of interest and use to a broader audience of plant scientists seeking an authoritative overview of recent advances in floral biology.
Author: Henry Trimen
Publisher:
ISBN:
Category : Botany
Languages : en
Pages : 352
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Book Description
Author: Peter R. Bell
Publisher: Cambridge University Press
ISBN: 9780521646734
Category : Nature
Languages : en
Pages : 364
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Book Description
The central theme of Green Plants, first published in 2000, is the astonishing diversity of forms found in the plant kingdom, from the simplicity of prokaryotic algae to the myriad complexities of flowering plants. The book is arranged according to generally accepted classification schemes, beginning with algae (prokaryotic and eukaryotic) and moving through mosses, liverworts, fern allies, ferns and gymnosperms to flowering plants. Copiously illustrated throughout, it provides a concise account of all algae and land plants, with information on topics from cellular structure to life cycles and reproduction. The authors maintain a refreshingly cautious approach in discussions of possible phylogenetic relationships and include newly emerging information on features of plants known only as fossils. This edition has been completely updated to reflect current views on the origin of the major groups of plants, providing a resource for students of botany, and for researchers needing a comprehensive reference to the plant kingdom.
Author: Joachim W. Kadereit
Publisher: Springer
ISBN: 9783642068225
Category : Science
Languages : en
Pages : 0
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Book Description
This volume contains a complete systematic treatment of the flowering plant order Asterales. This comprises 12 families with approx. 1,720 genera and about 26,300 species. Identification keys are provided for all genera, and likely phylogenetic relationships are discussed extensively. The wealth of information contained in this volume makes it an indispensable source for all working in the fields of pure and applied plant sciences.
Author: M. R. Ahuja
Publisher: Springer
ISBN: 3319664263
Category : Science
Languages : en
Pages : 511
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Book Description
This book provides complete, comprehensive, and broad subject-based reviews for students, teachers, researchers, policymakers, conservationists, and NGOs interested in the biodiversity and conservation of woody plants. Forests cover approximately 31 percent of the world’s total landmass; 93 percent is natural forest and only 7 percent consists of planted trees. Forest decline is progressing at an alarming rate worldwide. In addition to human activities (logging, deforestation, and exploiting forest lands for agriculture and industrial use), a number of other factors – including pests and diseases, drought, soil acidity, radiation, and ozone – are cumulatively contributing to global forest decline. The present situation forces us to focus on forest conservation strategies for the present and future. Gene conservation and maintaining genetic diversity in forest ecosystems are crucial to the preservation of forest genetic resources. This calls for integrated action to implement both the in situ (on site) preservation of forest stands and ex situ (distant from the original site) strategies for the conservation of woody plants’ genetic resources. Selected priority areas include: 1) assessing patterns of genetic diversity and threats, 2) understanding the biological processes regulating genetic diversity, 3) assessing the impact of human activities and climate change on genetic diversity, and 5) finding methods for prioritizing species and populations for the conservation of forest trees genetic resources. All chapters were written by leading scientists in their respective fields, which include: woody plant diversity, ecology and evolution; assessment of genetic diversity in forest tree populations; conservation planning under climate change; and in situ and ex situ strategies, including biotechnological approaches, for the conservation of woody plants genetic resources.
