作者: Mechanics 時間: 2025-3-21 23:24
Advances in Vegetation Sciencehttp://image.papertrans.cn/r/image/821132.jpg作者: NEG 時間: 2025-3-22 03:26
https://doi.org/10.1007/978-94-015-9602-2Erosion; Vegetation; ecosystem; ecosystems; hydrology; production; soil; hydrogeology作者: 仔細(xì)檢查 時間: 2025-3-22 07:57
Introductionad ecosystem degradation. An extreme form of such degradation, termed ‘desertification’, is estimated to affect the living conditions of about one billion people. As a result, this topic spawned the United Nations Convention to Combat Desertification (UN-CCD) in 1994.作者: Lipoma 時間: 2025-3-22 12:35 作者: 使服水土 時間: 2025-3-22 16:58 作者: majestic 時間: 2025-3-22 17:09
Book 2000tory, monitor and repair the condition ofdegraded lands. One of the most important distinctions to be made inrelation to land degradation is between cultivated land used forannual crop production and `rangelands‘. Grazing by free-roaminglivestock is the traditional primary use of the world‘s rangela作者: glans-penis 時間: 2025-3-22 23:14
Introductionad ecosystem degradation. An extreme form of such degradation, termed ‘desertification’, is estimated to affect the living conditions of about one billion people. As a result, this topic spawned the United Nations Convention to Combat Desertification (UN-CCD) in 1994.作者: Decongestant 時間: 2025-3-23 01:45
Desertification: an appeal for a broader perspectiveue and often confusing concept because of the many meanings of the term ‘desert’. The current definition by the United Nations confines desertification to arid areas. This rather narrow definition limits political and economic actions and constrains programs aimed at combating desertification or rev作者: Mercantile 時間: 2025-3-23 09:35 作者: Conserve 時間: 2025-3-23 10:33 作者: 保留 時間: 2025-3-23 15:14
Hydrologic effects on rangeland degradation and restoration processesacteristics and rain use efficiency. The degree to which these hydrologic attributes are affected by land use determines the impact of the land use on the ecosystem. Simply removing the initial cause of degradation may not restore the site’s production potential, and may not even break the pattern o作者: 剛毅 時間: 2025-3-23 20:16 作者: 發(fā)炎 時間: 2025-3-23 23:48 作者: 旁觀者 時間: 2025-3-24 05:12
Assessing and monitoring desertification with soil indicatorsssess desertification in rangelands. The procedure is entirely field-based, using indicators of surface processes to infer the status of landscape on a function/dysfunction continuum. The first step is to identify, map and measure zones of resource loss (run-off) and resource gain (run-on) in the la作者: Receive 時間: 2025-3-24 08:05 作者: oncologist 時間: 2025-3-24 11:59
Agricultural and ecological perspectives of vegetation dynamics and desertificationsurement of degradation and management application. The first view embodies an agricultural perspective developed from a lengthy research programme in the relatively unpredictable Nama-karoo biome of South Africa. The guiding theoretical principle within agricultural research borrows heavily from Cl作者: 在駕駛 時間: 2025-3-24 18:38
The United Nations data bases on desertificationlobal Assessment of Human-Induced Soil Degradation (GLASOD). New assessments have been carried out regionally in Asia and at national level in a number of other countries. Based on these, a new, extensively revised edition of the World Atlas of Desertification was published by UNEP in 1997. Work con作者: 容易生皺紋 時間: 2025-3-24 22:31 作者: facetious 時間: 2025-3-25 02:06
Evolution of rangeland conservation strategiesand community involvement. In this paper, the long history of combating desertification in Iceland is used to illustrate past, present and future perspectives in the implementation of rangeland conservation programs..Livestock production based on grazing of rangelands has been the mainstay of Icelan作者: Femine 時間: 2025-3-25 06:08
Policy and law for rangeland conservationthe land has been leased to users under various ‘pastoral’ Acts. Administrative responsibility lies with State and Territory governments. The approach taken by the Commonwealth, State and Territory governments to the development of law and policy concerning rangeland has lacked sustainable land mana作者: Synovial-Fluid 時間: 2025-3-25 10:16 作者: 學(xué)術(shù)討論會 時間: 2025-3-25 15:22
The United Nations Convention to Combat Desertification: constraints to implementation in Eastern Afe the United Nations Resolution for Urgent Action for Africa, the implementation of the CCD in the rangelands of Eastern Africa has been constrained by the often intricate patterns of land use and cropping exacerbated by drought, civil strife and famine (Anon., 1997; Guturo, 1997; Njuki, 1997). Ther作者: 完成才會征服 時間: 2025-3-25 18:06
Erosion models: use and misuse on rangelandsal desertification issues, erosion modeling must move beyond general or simplistic long-term erosion estimates. Future erosion models must be usable in an ecological context and address “state and transition” and “threshold” concepts and principles.作者: 暫停,間歇 時間: 2025-3-25 22:05
Scaling up from field measurements to large areas using the Desertification Response Unit and Indica ecosystem health are highly appropriate for studying desertification, but they can not be applied uniformly. Rather, they must be applied within the framework of a typology of land units within which the responses to change are similar.作者: cultivated 時間: 2025-3-26 03:32
Policy and law for rangeland conservationd with environmental policy and law that gives specific attention to the ecological characteristics of rangeland and their sustainable limits. This paper examines existing legislation and policy and proposes an environmental law alternative to achieve sustainable land use.作者: 喪失 時間: 2025-3-26 06:55
Rangelands issues and trends in developing countriese of promising ideas and practices in some developing countries. These include improved democracy and governance, bottom-up approaches and integration of multi sectoral actions. The progressive adoption of these concepts will contribute immensely to the successful transition to sustainable rangeland rehabilitation and development.作者: Platelet 時間: 2025-3-26 12:11
ll as earth scientists.Coral reefs highly topical because of.Coral reefs are the largest landforms built by plants and animals. Their study therefore incorporates a wide range of disciplines. This encyclopedia approaches coral reefs from an earth science perspective, concentrating especially on mode作者: 思想流動 時間: 2025-3-26 16:04 作者: majestic 時間: 2025-3-26 19:07
Olafur Arnaldsll as earth scientists.Coral reefs highly topical because of.Coral reefs are the largest landforms built by plants and animals. Their study therefore incorporates a wide range of disciplines. This encyclopedia approaches coral reefs from an earth science perspective, concentrating especially on mode作者: CRAFT 時間: 2025-3-26 22:36
Steve Archer,Chris Stokesll as earth scientists.Coral reefs highly topical because of.Coral reefs are the largest landforms built by plants and animals. Their study therefore incorporates a wide range of disciplines. This encyclopedia approaches coral reefs from an earth science perspective, concentrating especially on mode作者: 籠子 時間: 2025-3-27 04:09
John A. Ludwig,David J. Tongwayll as earth scientists.Coral reefs highly topical because of.Coral reefs are the largest landforms built by plants and animals. Their study therefore incorporates a wide range of disciplines. This encyclopedia approaches coral reefs from an earth science perspective, concentrating especially on mode作者: 陳列 時間: 2025-3-27 08:54 作者: condone 時間: 2025-3-27 10:05
Frederick B. Pierson Jr.0 entries covering 23 topic fields, plus some 500 black-and-.Determining and understanding the molecular mechanisms of disease is one of the key goals of modern medical research. The studies of medical genetics, microbiology, immunology, structural biology, molecular cell biology, neuroscience and d作者: Minutes 時間: 2025-3-27 15:07 作者: 旅行路線 時間: 2025-3-27 19:16 作者: 壓艙物 時間: 2025-3-28 01:08
Anton Imeson,Erik Cammeraat0 entries covering 23 topic fields, plus some 500 black-and-.Determining and understanding the molecular mechanisms of disease is one of the key goals of modern medical research. The studies of medical genetics, microbiology, immunology, structural biology, molecular cell biology, neuroscience and d作者: antiquated 時間: 2025-3-28 03:25
M. Timm Hoffman0 entries covering 23 topic fields, plus some 500 black-and-.Determining and understanding the molecular mechanisms of disease is one of the key goals of modern medical research. The studies of medical genetics, microbiology, immunology, structural biology, molecular cell biology, neuroscience and d作者: exceptional 時間: 2025-3-28 09:56 作者: 大炮 時間: 2025-3-28 14:27
David Sanders, microbiology, immunology, structural biology, molecular cell biology, neuroscience and developmental biology have been brought to bear on the full range of human diseases. This comprehensive Encyclopedia supplies the reader with concise information on molecular pathophysiology of human disease...E作者: Coronary 時間: 2025-3-28 17:23
Andres Arnalds, microbiology, immunology, structural biology, molecular cell biology, neuroscience and developmental biology have been brought to bear on the full range of human diseases. This comprehensive Encyclopedia supplies the reader with concise information on molecular pathophysiology of human disease...E作者: Intuitive 時間: 2025-3-28 20:58
Ian Hannam, microbiology, immunology, structural biology, molecular cell biology, neuroscience and developmental biology have been brought to bear on the full range of human diseases. This comprehensive Encyclopedia supplies the reader with concise information on molecular pathophysiology of human disease...E作者: Obstacle 時間: 2025-3-29 01:29 作者: 陳列 時間: 2025-3-29 04:57 作者: 油膏 時間: 2025-3-29 08:35 作者: landmark 時間: 2025-3-29 13:01 作者: BALE 時間: 2025-3-29 16:35
Viewing rangelands as landscape systemss) are carried by runoff, or by winds, and are captured and concentrated within landscape patches (reserves). If the availability of these resources within a patch exceeds a critical threshold, a production ‘pulse’ occurs. The organic structures and materials produced in such pulses feedback to buil作者: modest 時間: 2025-3-29 21:17 作者: Influx 時間: 2025-3-30 03:34
Desert rangelands, degradation and nutrientsct soil nutrients. Unfortunately, assessment and monitoring technologies based on soil properties which quantify integrity of nutrient related processes have not been fully developed. Approaches for remediating degraded conditions need to exploit nutrient spatial and temporal heterogeneities. Remedi作者: 淡紫色花 時間: 2025-3-30 06:00 作者: 止痛藥 時間: 2025-3-30 11:54
Agricultural and ecological perspectives of vegetation dynamics and desertificationfurther degradation of the Nama-karoo. In contrast, the more recent ecological perspective of vegetation dynamics and desertification, emphasizes spatial and temporal unpredictability as its guiding principle. Ironically most ecological research has been carried out in the relatively more predictabl作者: 朦朧 時間: 2025-3-30 12:27
The implementation of soil conservation programmess of identification of the problems, developing and then implementing solutions. While participation is important, landusers will not change the way in which they manage land unless the right blend of incentives and disincentives exists. Some of the incentives that affect soil conservation programme作者: 吊胃口 時間: 2025-3-30 20:02
Evolution of rangeland conservation strategieshasized federal intervention, agronomic approaches (seeding, fertilization) and degradation “containment”. As a consequence, soil conservation came to be regarded as a government responsibility, rather than a responsibility of the land user. In contrast, current programs emphasize sustainable land u作者: Fortify 時間: 2025-3-30 20:48 作者: osteoclasts 時間: 2025-3-31 03:25 作者: Infirm 時間: 2025-3-31 06:52
drology, nutrients and erosion. Chapters in the second sectionexamine socio-economic constraints and approaches for preventing andreversing degradation. .The book provides a contemporary, process-oriented perspective onrangeland degradation of value to students, policy-makers andprofessionals alike.978-90-481-5359-6978-94-015-9602-2作者: 反感 時間: 2025-3-31 10:23
es covering areas of geology, geography and ecology, providing comprehensive access to the most up-to-date research on the structure, form and processes operating on Quaternary coral reefs..978-90-481-2639-2Series ISSN 1388-4360 Series E-ISSN 1871-756X 作者: 貪心 時間: 2025-3-31 15:27
Olafur Arnalds,Steve Archeres covering areas of geology, geography and ecology, providing comprehensive access to the most up-to-date research on the structure, form and processes operating on Quaternary coral reefs..978-90-481-2639-2Series ISSN 1388-4360 Series E-ISSN 1871-756X 作者: chemoprevention 時間: 2025-3-31 20:07
Olafur Arnaldses covering areas of geology, geography and ecology, providing comprehensive access to the most up-to-date research on the structure, form and processes operating on Quaternary coral reefs..978-90-481-2639-2Series ISSN 1388-4360 Series E-ISSN 1871-756X
