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Author: Food and Agriculture Organization of the United Nations
Publisher: Food and Agriculture Organization of the United Nations
ISBN: 9251373345
Category : Social Science
Languages : en
Pages : 217
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Book Description
Water scarcity is one of the major challenges in the 19 countries of the Near East and North Africa (NENA) region. The lack of water is affecting important irrigated areas, limiting the increase of food production needed to address the growing demand due to population growth. In most countries of the NENA region, the need to use non-conventional water resources, including brackish water, is well recognized. Brackish water is loosely defined as water that is more saline than freshwater, but less saline than seawater. It covers a large range of salinity levels, from 500 to 30 000 mg/l of total dissolved solids (TDS). Despite the presence of large amounts of brackish water and its potential for use in growing a number of crops, it is only used in limited amounts for irrigation. The successful use of brackish water for irrigation requires a basic understanding of scientific principles affecting the interactions among the climate, the applied water, the soil, the crop, and the environment. Equally important is the application of suitable technology and management practices that will facilitate the optional use of this poor-quality water. The successful use of brackish water requires a higher level of management and likely the adoption of new irrigation management practices. Because climate, water quality, soil type, and crop tolerance to salinity vary from location to location, guidelines, with some degree of site-specific flexibility, must be developed.
Author: Food and Agriculture Organization of the United Nations
Publisher: Food and Agriculture Organization of the United Nations
ISBN: 9251373345
Category : Social Science
Languages : en
Pages : 217
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Book Description
Water scarcity is one of the major challenges in the 19 countries of the Near East and North Africa (NENA) region. The lack of water is affecting important irrigated areas, limiting the increase of food production needed to address the growing demand due to population growth. In most countries of the NENA region, the need to use non-conventional water resources, including brackish water, is well recognized. Brackish water is loosely defined as water that is more saline than freshwater, but less saline than seawater. It covers a large range of salinity levels, from 500 to 30 000 mg/l of total dissolved solids (TDS). Despite the presence of large amounts of brackish water and its potential for use in growing a number of crops, it is only used in limited amounts for irrigation. The successful use of brackish water for irrigation requires a basic understanding of scientific principles affecting the interactions among the climate, the applied water, the soil, the crop, and the environment. Equally important is the application of suitable technology and management practices that will facilitate the optional use of this poor-quality water. The successful use of brackish water requires a higher level of management and likely the adoption of new irrigation management practices. Because climate, water quality, soil type, and crop tolerance to salinity vary from location to location, guidelines, with some degree of site-specific flexibility, must be developed.
Author: Richard S. K. Barnes
Publisher: Cambridge University Press
ISBN: 9780521455565
Category : Nature
Languages : en
Pages : 308
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Book Description
A guide to the animals and habitats of brackish water in northwestern Europe.
Author: A.G. Caljon
Publisher: Springer Science & Business Media
ISBN: 9400965540
Category : Science
Languages : en
Pages : 277
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Book Description
Numerous papers have been published on the animal and algal communities of fresh-water and marine biotopes, and their relation to the physical and chemical factors of their environment. Brackish-water biotopes have been studied much less intensely, presumably due to their limited distribution and to the complexity of their bioco enoses, composed of fresh-water, brackish-water and marine organisms. The reduced size of the species present forms a supplementary difficulty, which is especially pronounced in the algal communities, a major part of which are composed of nanno-phytoplankters. The University of Ghent considered a detailed survey sufficiently attractive to set up because of the high species diversity, the gaps in the knowledge of brackish-water nannophytoplankton at the species and population levels, and the convenient proximity of brackish-water biotopes. Moreover, the brackish-water biotopes proved to be unique, and consist of a series of landlocked creeks, con nected to the sea by means of an underground salt water supply. VII Contents Chapter 1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Chapter 2 Study area. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2. 1. Topographical situation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2. 2. Historical aspects. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2. 3. Edaphic factors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2. 4. Hydrology. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2. 4. 1. Salinity fluctuations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2. 4. 2. Origin of the brownish colour of certain creeks. . . . . . . . . . . . . . . . . . . . . . . . 6 2. 4. 3. Hydrography. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2. 5. Biotopes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2. 6. Climatic features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Chapter 3 Methods. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3. 1. Sampling procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 3. 2. Physical properties, water chemistry, chlorophyll a and phaeophytin a . . . . . . . . . . . . . 11 3. 3. Phytoplankton samples. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 3. 4. Periphyton and benthos samples. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Author: Uma K. Srivastava
Publisher: Concept Publishing Company
ISBN:
Category : Brackish water aquaculture
Languages : en
Pages : 288
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Book Description
Author: G. Rheinheimer
Publisher: Springer Science & Business Media
ISBN: 3642667910
Category : Science
Languages : en
Pages : 303
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Book Description
A knowledge, which is as accurate as possible of microbial ecology is indispensible for ecosystem research and environmental protection. This is particularly true for coastal waters, whereby brackish water areas occupy a special position. After several years of preliminary studies on the composition and distribution of the micro flora -algae, fungi, and bacteria -a comprehensive investigation on the primary production, bacterial development and microbial uptake and decom position of substances in the Kie1 Bight was carried out, during which ten scientists from the Institut fUr Meereskunde ofKiel University participated. Here forthe first time numerous hydrographical, chemical and microbiological parameters could be measured on the same water samples. The aim of this joint project was to gain an insight into the manifold functions of the microorganisms in the uptake and degradation of organic substances and in the connections between pollution, production, and remineralization. The results ofthe investigations led not only to new knowledge of the role ofthe microorganisms in the brackish water ecosystem, but also to a revision of earlier conceptions, especially on the influence of wastes on the micro flora and its role in the self-purification of coastal waters. Such a time-limited investigation, however, cannot clarify all the questions on the complex relationships between the microorganisms and their biotope. Therefore, the present volume should also be understood as a stimulus for new and further-reaching research on the microbial ecology of coastal waters. Thereby the most important methods are described, as well as the practical experience obtained.
Author: M. Vinarski
Publisher: Litres
ISBN: 5040637349
Category : Science
Languages : en
Pages : 545
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Book Description
В монографии обобщены данные о таксономии, номенклатуре, географическом распространении и некоторых аспектах биономии моллюсков пресных и солоноватых вод территории бывшего СССР. Всего в настоящий каталог включены данные о 424 номинальных видах класса Bivalvia и 728 номинальных видах Gastropoda. Актуальное видовое богатство водных континентальных моллюсков бывшего СССР, вероятно, существенно ниже, поскольку валидность многих из номинальных видов нуждается в дополнительном подтверждении, и в будущем часть из них может быть сведена в синонимы. Каждому виду посвящен краткий очерк, построенный по единой схеме. Также в каталоге содержатся данные о распространении всех видов моллюсков по отдельным регионам бывшего СССР, сведения о вселении инвазивных видов, информация об охранном статусе отдельных видов в соответствии с критериями МСОП. Также приведены количественные данные о сходстве водных фаун отдельных регионов бывшего СССР и результаты кластерного анализа, выполненного на их основе. Книга предназначена для специалистов в области малакологии, биогеографии, гидробиологии, а также для преподавателей и студентов высших учебных заведений.The monograph summarizes information on taxonomy, nomenclature, distribution and some aspects of bionomics of molluscs of the former USSR fresh and brackish waters. This ‘Analytical catalogue’ is a deeply improved and updated version of two previously published catalogue works (Yu.I. Kantor, A.V. Sysoev “Catalogue of molluscs of Russia and adjacent countries”, 2002, in Russian; and Yu.I. Kantor, M.V. Vinarski, A.A. Shileyko, A.V. Sysoev “Catalogue of the continental mollusks of Russia and adjacent territories”, 2010). In total, the data on 424 nominal species of Bivalvia and 728 nominal species of Gastropoda are included into this book. The actual species richness of aquatic continental molluscs of the former USSR perhaps is significantly lower since validity of many of these nominal species may be questioned and a portion of them is destined to be synonymized in future. During preparation of the book the authors tried to take into account different views on systematization of the ex- USSR aquatic molluscs and to find some correspondence between the ‘Russian’ system (founded in 1960–1970s by Ya.I. Starobogatov) and the approach followed by malacologists working outside Russia. Current approaches to the ‘species problem’ in malacology are briefly discussed. Also, the catalogue includes information about distribution of all molluscan species among large regions of the former USSR area, some data about invasions of alien species and the conservation status of indigenous taxa in accordance with IUCN Red List criteria. The quantitative estimates of faunistic similarity between aquatic malacofaunas of the ex-USSR large regions and the results of the cluster analysis carried out on the basis of these estimates are also provided. The book is addressed to malacologists, biogeographers, hydrobiologists as well as to university lecturers and students.
Author: Donald L. Brown
Publisher:
ISBN:
Category : Artificial groundwater recharge
Languages : en
Pages : 64
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Author: Melanie L. J. Stiassny
Publisher: IRD Editions
ISBN: 9782709916202
Category : Brackish water fishes
Languages : en
Pages : 808
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Author: Lari A. Knochenmus
Publisher:
ISBN:
Category : Floridan Aquifer
Languages : en
Pages : 58
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Author: M. H. Gallatin
Publisher:
ISBN:
Category : Brackish waters
Languages : en
Pages : 32
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Book Description
