Описание: Steppes form one of the largest biomes. Drastic changes in steppe ecology, land use and livelihoods came with the emergence, and again with the collapse, of communist states. Excessive ploughing and vast influx of people into the steppe zone led to a strong decline in nomadic pastoralism in the Soviet Union and China and in severely degraded steppe ecosystems. In Mongolia nomadic pastoralism persisted, but steppes degraded because of strongly increased livestock loads. After the Soviet collapse steppes regenerated on huge tracts of fallow land. Presently, new, restorative steppe land management schemes are applied. On top of all these changes come strong effects of climate change in the northern part of the steppe zone. This book gives an up-to-date overview of changes in ecology, climate and use of the entire Eurasian steppe area and their effects on livelihoods of steppe people. It integrates knowledge that so far was available only in a spectrum of locally used languages.
Автор: Willig Michael R., Walker Lawrence R. Название: Long-Term Ecological Research: Changing the Nature of Scientists ISBN: 019938021X ISBN-13(EAN): 9780199380213 Издательство: Oxford Academ Рейтинг: Цена: 13939.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: The Long-Term Ecological Research (LTER) Program is, in a sense, an experiment to transform the nature of science, and represents one of the most effective mechanisms for catalyzing comprehensive site-based research that is collaborative, multidisciplinary, and long-term in nature. The scientific contributions of the Program are prodigious, but the broader impacts of participation have not been examined in a formal way. This book captures the consequences of participation in the Program on the perspectives, attitudes, and practices of environmental scientists. The edited volume comprises three sections. The first section includes two chapters that provide an overview of the history, goals, mission, and inner workings of the LTER network of sites. The second section comprises three dozen retrospective essays by scientists, data managers or educators who represent a broad spectrum of LTER sites from deserts to tropical forests and from arctic to marine ecosystems. Each essay addresses the same series of probing questions to uncover the extent to which participation has affected the ways that scientists conduct research, educate students, or provide outreach to the public. The final section encompasses 5 chapters, whose authors are biophysical scientists, historians, behavioral scientists, or social scientists. This section analyzes, integrates, or synthesizes the content of the previous chapters from multiple perspectives and uncovers emergent themes and future directions.
Автор: Akshay Kumar Chakravarthy; Shakunthala Sridhara Название: Arthropod Diversity and Conservation in the Tropics and Sub-tropics ISBN: 9811015171 ISBN-13(EAN): 9789811015175 Издательство: Springer Рейтинг: Цена: 27950.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: Arthropods are invertebrates that constitute over 90% of the animal kingdom, and their bio-ecology is closely linked with global functioning and survival. Arthropods play an important role in maintaining the health of ecosystems, provide livelihoods and nutrition to human communities, and are important indicators of environmental change. Yet the population trends of several arthropods species show them to be in decline. Arthropods constitute a dominant group with 1.2 million species influencing earth’s biodiversity. Among arthropods, insects are predominant, with ca. 1 million species and having evolved some 350 million years ago. Arthropods are closely associated with living and non-living entities alike, making the ecosystem services they provide crucially important. In order to be effective, plans for the conservation of arthropods and ecosystems should include a mixture of strategies like protecting key habitats and genomic studies to formulate relevant policies for in situ and ex situ conservation. This two-volume book focuses on capturing the essentials of arthropod inventories, biology, and conservation.Further, it seeks to identify the mechanisms by which arthropod populations can be sustained in terrestrial and aquatic ecosystems, and by means of which certain problematic species be managed without producing harmful environmental side-effects. This edited compilation includes chapters contributed by over 80 biologists on a wide range of topics embracing the diversity, distribution, utility and conservation of arthropods and select groups of insect taxa. More importantly, it describes in detail the mechanisms of sustaining arthropod ecosystems, services and populations. It addresses the contribution of modern biological tools such as molecular and genetic techniques regulating gene expression, as well as conventional, indigenous practices in arthropod conservation. The contributors reiterate the importance of documenting and understanding the biology of arthropods from a holistic perspective before addressing conservation issues at large. This book offers a valuable resource for all zoologists, entomologists, ecologists, conservation biologists, policy makers, teachers and students interested in the conservation of biological resources.
Описание: Based on field-tested techniques and incorporating a wealth of empirical data, this publication covers both design and project management aspects of afforestation and reforestation. The work is applicable to a range of environments including urban settings.
Автор: Miodrag Ristic; Miodrag Ristic; Ian MacIntyre; Jam Название: Diseases of Cattle in the Tropics ISBN: 940118352X ISBN-13(EAN): 9789401183529 Издательство: Springer Рейтинг: Цена: 12157.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: In South America, principal sites for raising cattle are shifting to the savannah lands because the more fertile soils are being used for crop produc tion, however, in the savannahs also, disease remains the most powerful deterrent in implementing the cattle industry.
Автор: Hamid, Mohamed Elamin Название: Skin Diseases of Cattle in the Tropics ISBN: 0128110546 ISBN-13(EAN): 9780128110546 Издательство: Elsevier Science Рейтинг: Цена: 5388.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание:
Skin Diseases of Cattle in the Tropics: A Guide to Diagnosis and Treatment is a clinical and practical guide to help animal scientists, field veterinarians, veterinary students, and technicians make appropriate and differential diagnoses. It features quizzes of clinical cases, along with multiple images of characteristic lesions and laboratory findings of major skin diseases (and diseases with skin manifestations) that are prevalent in tropical areas, notably the Sub-Saharan African countries.
This self-learning and easy-to-use instructional guide, a unique offering in the field of animal science and veterinary medicine, provides essential and foundational information about relevant skin conditions that are followed by illustrated flow charts of laboratory diagnoses and summaries of respective diseases.
This title makes the subject accessible for practicing veterinarians and animal scientists, and is particularly useful for those who have neither seen nor had the chance to see these diseases in the field or clinics. Such diseases are important not only in the tropics, but may be encountered in many countries in subtropical and temperate zones.
Features more than 100 images of lesions and laboratory findings of major skin diseases and diseases with skin manifestations that are prevalent in tropical areas
Includes clinical-case quizzes for self-directed learning
Covers laboratory diagnosis, clinical presentations, and the summary of all important facts about the disease, including their etiology
Описание: Based on field-tested techniques and incorporating a wealth of empirical data, this publication covers both design and project management aspects of afforestation and reforestation. The work is applicable to a range of environments including urban settings.
Описание: The United Nations Environment Programme (UNEP) has sponsored a programme of research into the primary productivity of grass ecosystems in the tropics and subtropics, resulting in this book. It represents the first internationally integrated study of bioproductivity since the IBP in the 1970s.
Автор: Patrice Dion Название: Soil Biology and Agriculture in the Tropics ISBN: 3642262619 ISBN-13(EAN): 9783642262616 Издательство: Springer Рейтинг: Цена: 20962.00 р. Наличие на складе: Есть у поставщика Поставка под заказ.
Описание: Soils of the Tropics.- Organic Matter and Micro-Organisms in Tropical Soils.- Impacts of Forest Conversion to Agriculture on Microbial Communities and Microbial Function.- The Structural and Functional Biodiversity of Soil: An Interdisciplinary Vision for Conservation Agriculture in Brazil.- The Potential of Soil Beneficial Micro-Organisms for Slash-and-Burn Agriculture in the Humid Forest Zone of Sub-Saharan Africa.- Microbial Populations of Arid Lands and their Potential for Restoration of Deserts.- Exploring the Ecological Significance of Microbial Diversity and Networking in the Rice Ecosystem.- Rhizobial Symbioses in Tropical Legumes and Non-Legumes.- Mycorrhizal Associations in Agroforestry Systems.- Agricultural Development in Tropical Acidic Soils: Potential and Limits of Phosphate-Solubilizing Bacteria.- Role of Microbial Biofertilizers in the Development of a Sustainable Agriculture in the Tropics.- Microbial Degradation of Pesticides in Tropical Soils.- Soil and Crop Contamination Through Wastewater Irrigation and Options for Risk Reduction in Developing Countries.- Towards a New Purpose for Traditional and Other Forms of Soil Knowledge.
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