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Author: Gary Brown
Publisher: Springer Science & Business Media
ISBN: 9400741413
Category : Science
Languages : en
Pages : 383
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Book Description
Although the unique flora of the Socotra Archipelago with its high degree of endemism has received much attention recently, little information is available on the vegetation and related ecological aspects. Based on their extensive field experience of the region, the authors have assimilated a vast amount of knowledge to produce this book, which gives a detailed insight into the plant ecology of Socotra, designated as a World Heritage Site by UNESCO in 2008. The book is divided into seven chapters. After a brief introduction and overviews of important abiotic features, various aspects of the vascular flora are presented in Chapter 4, together with accounts of the bryophyte and lichen flora. Ecology and adaptive strategies of the plants are dealt with in Chapter 5, and Chapter 6 gives a concise description of the main vegetation units. Finally, important management issues of the vegetation are discussed, an essential topic to ensure preservation of the natural heritage of the archipelago.
Author: Isaac Bayley Balfour
Publisher: Legare Street Press
ISBN: 9781015981942
Category : History
Languages : en
Pages : 0
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Book Description
This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Author: Gary Brown
Publisher: Springer Science & Business Media
ISBN: 9400741413
Category : Science
Languages : en
Pages : 383
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Book Description
Although the unique flora of the Socotra Archipelago with its high degree of endemism has received much attention recently, little information is available on the vegetation and related ecological aspects. Based on their extensive field experience of the region, the authors have assimilated a vast amount of knowledge to produce this book, which gives a detailed insight into the plant ecology of Socotra, designated as a World Heritage Site by UNESCO in 2008. The book is divided into seven chapters. After a brief introduction and overviews of important abiotic features, various aspects of the vascular flora are presented in Chapter 4, together with accounts of the bryophyte and lichen flora. Ecology and adaptive strategies of the plants are dealt with in Chapter 5, and Chapter 6 gives a concise description of the main vegetation units. Finally, important management issues of the vegetation are discussed, an essential topic to ensure preservation of the natural heritage of the archipelago.
Author: G. B. Popov
Publisher:
ISBN:
Category : Plants
Languages : en
Pages : 15
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 17
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Author: Isaac Bayley Balfour
Publisher: Theclassics.Us
ISBN: 9781230734101
Category :
Languages : en
Pages : 62
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Book Description
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1888 edition. Excerpt: ...has existed it is impossible to doubt, and by it the vegetation of the Orient gained extension into Socotra. But there are those other Asian forms which do not occur anywhere in south-west Asia to account for--Indian and other Eastern affinities. How did they reach Socotra 1 An elevation of land that would unite Socotra and Madagascar with Africa--an elevation which certainly took place--would, if increased and continued over a wider area, produce some interesting changes in surface features. Not only would the Gulf of Aden disappear by the union of Africa with Arabia, but there would be no Persian Gulf, and the Euphrates would pour its waters through a delta extending over a large part of the Arabian Sea, and through this delta the Indus would also discharge, the coast-line of the Indiau Peninsula being advanced to some extent. South of the equator Madagascar would join the Seychelles, which in turn, through the Malha and Nazareth banks, would run into the larger Mascarene Islands. In this way, then, Africa would have an irregular coast-line prolonged greatly south of the equator into the Indian Ocean, and running up with an advance upon its present line until it reached its north-eastern limit outside and south of Socotra. Thence an advanced land-surface of Asia would extend across the Arabian Sea into the Indian Peninsula. It appears to me that we must assume that some such land-surface as this existed to aid us in explaining the migration westward to Socotra of Indo-Malayan types, several of which have a striking extension into Madagascar and the Mascarene Islands. Lieutenant-Colonel GodwinAusten asserts that the relationship of the Socotran land-shells are such as to warrant the conclusion of a prolongation of land-surface which...
Author: Abdualmaged Al-Hemiary
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
The island of Socotra has long been in geographical isolation, hence nearly 30% of the plant species are believed to be endemic to the island. Until the end of 20th century there was only very little and incomplete information and literature about the vegetation on the island. This isolation broke down in 1990 with the country unification in which then the island received much attention. Subsequently the scientific knowledge of the local flora slowly increased, but many of plant species are now reported to be confined into small populations, hence being particularly vulnerable to habitat loss, overgrazing, as well as urban expansion. 1. The overall objective of this research attempted to assess and examine the trends of vegetation changes since 1972 to 2010 with the use of Landsat MSS, TM and ETM+ images and to investigate the related driving factors, such as rainfall, grazing pressure changes and underlying spatial variability of the landscape. This is to answer the overall question: Is there a trend in biomass, cover and species composition on Socotra Island over the last 40 years? If so, is that trend associated with the rainfall patterns? What are the drivers behind the vegetation change? And then how can we define changes in patterns or changes in this study area? 2. From a methodological point of view, our approach of systematically using remote sensing technology data proved scientifically an applicable tool to improve our understanding of the spatial complexity and heterogeneity of the vegetation cover as well as to provide a conceptual method with specific data for monitoring the changes over this time period. Our data obtained from these different Landsat sensors during the study period were - after many sophisticated processing steps - essentially able to provide time series information for Normalized Difference Vegetation Index (NDVI) data and to assess the long term trend in vegetation cover in the island. 3. Moreover, our approach combining supervised maximum-likelihood and unsupervised classification with the pre- and the post-classification approaches besides the knowledge based classification was table to provide sufficient results to distinguish and to map nine (9) terrestrial vegetation cover classes. The overall accuracy (compared with ground truth data) was about 91%, 77%, 70% and 72% for the images 2005, 1994, 1984 and 1972 respectively. Consecutively, the GIS analysis allowed estimates of highly valuable information as absolute areas and relative coverage of particular vegetation classes over the island with their spatial distribution and also their ecological requirements. Analysis of climatic conditions and NDVI 4. As a results of the complex topography of the study area and the wide climate range, with the guidance of prior knowledge of functional relationships between site parameters, ecosystem and the specific form of biological production, our work resulted in a division of the entire area into six variously sized ecosystem units, which were enough to properly depict the spatial heterogeneity of the rainfall and vegetation and to assist reflecting the influence and reaction between environmental parameters as well as it might have significance both for development of resources and for conservation of environment.
Author: Anthony G. Miller
Publisher:
ISBN: 9780748604753
Category : Botany
Languages : en
Pages :
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Author: D. Brian Doe
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 248
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Author:
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 536
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Book Description
As part of a global effort to identify those areas where conservation measures are needed most urgently, World Wildlife Fund has assembled teams of scientists to conduct ecological assessments of all five continents. Terrestrial Ecoregions of Africa and Madagascar is the latest contribution, presenting in a single volume the first comprehensive assessment of biodiversity patterns, threats to biodiversity, and resulting conservation priorities across the African continent and its islands. Looking at biodiversity and threats in terms of biological units rather than political units, the book offers a comprehensive examination of African biodiversity across all biomes and multiple taxonomic groups. In addition to the seven main chapters, the book includes twenty essays by regional experts that provide more depth on key issues, as well as nine detailed appendixes that present summary data used in the analyses, specific analytical methodologies, and a thorough text description for each of Africa's 119 terrestrial ecoregions. Terrestrial Ecoregions of Africa and Madagascar provides a blueprint for conservation action and represents an unparalleled guide for investments and activities of conservation agencies and donor organizations.
Author: Norbert Kilian
Publisher:
ISBN: 9783921800614
Category : Biodiversität
Languages : en
Pages : 175
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Book Description
