Southern Africa Collection

The Grassland Society of Southern Africa (GSSA) is involved and concerned with the science and practice of range and pasture management. This broad field involves primarily the use and conservation of natural resources. It encompasses applied fields such as livestock production, wildlife management, nature conservation, water catchment management and range and mine-dump rehabilitation. The disciplines include, amongst others, ecology, botany zoology, range and pasture science, animal science, soil science and genetics. This collection includes journal articles from the African Journal of Range and Forage Science as well as related articles and reports from throughout the Southern African region.

Contact
Grassland Society of Southern Africa
Address: 
GSSA
PO Box 41
Hilton
3245
South Africa
Total Entries in Collection: 
3603

Records in Collection

Published: 2006
Soil texture is an important influence on nutrient cycling in upland soils, with documented relationships between mineral particle size distribution and organic matter retention, nitrogen (N) mineralization, microbial biomass and other soil...
Published: 2009
Changing climate adds a very significant dimension to the complex problem of ensuring that agriculture worldwide can feed the burgeoning human population. Ensuring food security must reduce environmental damage, not add to it. Population growth, the...
Published: 2007
Summary Grasses are one of the great successes of evolution. They occur in nearly every habitat from impoverished Antarctic wastes to the lush tropics and are dominant over vast stretches of landscape (Woodward et al., 2004). The importance of...
Published: 2001
Summary The savanna biome is diverse, including formations ranging from almost treeless grasslands to more or less closed-canopy woodlands with considerable variation in plant composition, biomass, and net primary productivity (NPP). Savannas cover...
Published: 2001
This chapter discusses the magnitude and dynamics of the soil organic carbon (SOC) and soil inorganic carbon (SIC) pools. The chapter also describes the impact of different land uses and management systems on these pools as sources or sinks of C in...
Published: 2011
The second edition of the United Nations Global Assessment Report on Disaster Risk Reduction is a resource for understanding and analysing global disaster risk today and in the future (Ban Ki-moon, in Preface). You can download from this page the...
Published: 2007
The pollen record of the late Pleistocene in Africa is poorly resolved due to the paucity of sites combined with the fragmented nature of most sequences. A vegetation history of the continent can, nevertheless, be reconstructed for the Last Glacial...
Published: 2002
Desertification is the diminution or destruction of the biological potential of land and can ultimately lead to desert-like conditions. It is an aspect of the widespread deterioration of ecosystems under the combined pressure of adverse and...
Published: 2001
Woody plant encroachment has been widespread in grassland and savanna ecosystems over the past century. This phenomenon jeopardizes grassland biodiversity and threatens the sustainability of pastoral, subsistence, and commercial livestock grazing....
Published: 2001
Summary In order to obtain a better insight into past vegetational and climatic changes along the Pole-Equator-Pole: Americas (PEP 1) transect, 32 late Quaternary pollen records from savanna and forest-savanna transition regions of the South...
Published: 2008
An overview of ecological models of grasslands and their research questions is presented. For the purpose of this article, models are regarded as a simplified and formalized representation of ecological processes, either using mathematical or...
Published: 2010
A thorough understanding of the behavior of fire in grasslands is critical to the minimization of the impact of fires on agricultural and pastoral land as well as the successful management of the health, robustness, and species diversity of native...
Published: 2001
Vegetation dominated by grasses, which is among the largest ecosystems in the world, has great environmental significance as well as providing feed for livestock and wildlife. Grassland types vary according to climatic zones as do their utilization...
Published: 2002
The tropics cover 8.2 billion hectares or approximately 40% of the world's land area. These regions are characterized by a large portion of the world's rapidly increasing population, high risks of soil and environmental degradation because...
Published: 2008
Summary 10.1002/9780470698716.ch20.abs This chapter contains section titled: * Early Grassland Soils * How did Grasslands Arise? * Evolutionary Processes
Published: 1970
No abstract available.
Published: 2002
The chapter discusses the bioclimatic regimes that are generally determined by temporal and spatial averaging of weather patterns. Local weather variations result from these broad geographic-scale phenomena, and local weather variables drive...
Published: 2007
The carbon- and oxygen-isotopic composition of surficial meteoric carbonate (soils, groundwater) is widely used in paleoenvironmental reconstruction in the Quaternary. Temperature, the oxygen-isotopic composition of rainwater, and evaporation are...
Published: 2006
Grassland in most cases is a man-made ecosystem. It covers large areas as a result of logging and slash-and-burn agriculture. It is maintained by regularly burning and cattle grazing. In contrast to forests, they contribute only insignificantly to...
Published: 2001
People have inhabited terrestrial ecosystems of the world for thousands of years. Both resource management systems and cosmological belief systems have evolved and continue to develop. In fact, most, if not all, ecosystems and biodiversity have been...
Published: 2008
Summary 10.1002/9780470292136.ch4.abs This chapter contains sections titled: * Objectives for This Chapter * Introduction * Factors Influencing the Agricultural Use of Animals * Animal Distribution and Use * Role of Animals in Agriculture and Daily...
Published: 2007
The world population has increased from 2–10 million at the dawn of settled agriculture about 10–12 millennium ago to 6.5 billion in 2006, and may stabilize at 10–12 billion by 2100. Most of the future increase in world population will occur in...
Published: 2002
No Abstract available.
Published: 2002
Decomposition is a process that releases nutrient materials in the structure of plant and animal tissues to the soil solution where the nutrients are once again potentially available to plants. Because most nutrient elements cycle from soil solution...
Published: 2001
Summary The growth of agricultural production worldwide has led to an increasing role of agro-ecosystems within the global carbon cycle. Arable land in the world covers about one-tenth of the 134 × 1012 m2 of total land area (excluding...
Published: 2003
This chapter describes relationships between environmental stress and the reaction of plants thereupon. Plants might react to environmental stress on various levels: on the biochemical, cellular, or morphological scale, and at species or population...
Published: 2002
This chapter discusses the value and future of natural desert ecosystems. The goods and services provided by ecological systems and the natural capital that produce them are critical to the functioning of the earth's life-support system. If...
Published: 1969
No abstract available.
Published: 2007
African lakes show considerable dynamism over a range of timescales, underlining the large changes in precipitation-evaporation balance that have characterized Quaternary climates in Africa. On a late-Quaternary timescale, much of tropical Africa is...
Published: 2010
Conservation Biology for All provides cutting-edge but basic conservation science to a global readership. A series of authoritative chapters have been written by the top names in conservation biology with the principal aim of disseminating cutting-...
Published: 2003
No Abstract available.
Published: 2003
Published studies relating erosion and productivity have been generally based on information derived from expert opinion on the extent and severity of soil erosion and on limited data on its impact on soil productivity, resulting in widely varying...
Published: 2001
The geology, climates past and present, and soils of Africa are summarized, as are the effects of fire on the vegetation. The vegetation and animals of each major zone – forest, tropical seasonal vegetation (woodland, shrubland, grassland, bushland...
Published: 2003
In the Sahel and the Kalahari, the growth in groundwater extraction via simple wells and boreholes is contributing to an increased use of dryland natural resources, to competition for resources, and to environmental changes. Livestock production...
Published: 2008
Mixed farming (the ‘Iron Age’) was introduced to the summer rainfall areas of southern Africa early in the first millennium AD and did not evolve from the local Later Stone Age. In southern Africa this introduction is linked to Eastern Bantu-...
Published: 2002
This chapter describes assessment, which is a one-time process that relies on a statistically valid sampling within a region and monitoring that consists of a series of measurements designed to provide information on the trajectory of change in the...
Published: 2010
Abstract Livestock grazing is often viewed as having detrimental effects on plants and plant communities. Livestock grazing can, however, be managed to be an effective tool for vegetation management. Grazing can be used to manipulate vegetation for...
Published: 2007
Sub-Saharan Africa (SSA) faces multiple problems. The main one is improving the lives of the 30% of its population that suffers from extreme poverty and food insecurity. As more than 70% of the population lives off farming and related activities,...
Published: 2008
Carrying capacity is typically defined as the maximum population size that can be supported indefinitely by a given environment, but there are at least 10 different specific definitions used in basic and applied ecology. The concept originated in...
Published: 2001
Summary Grasslands are located in areas with precipitation ranging between 150 and 1200 mm yr-1 and temperature between 0 and 25 C (Lieth and Whittaker, 1975). Along a precipitation gradient, in temperate regions, grasslands are located between...
Published: 2002
The chapter describes different patches that are included in a single landscape unit. Patches differ in size, species composition, and the way they function in a landscape. Patches may be composed of a single plant (one species), a group of plants (...
Published: 2008
Savannas are characterized by the coexistence of trees and grasses and occur largely in the seasonal tropics between the equatorial rainforests and mid-latitude desert ecosystems. This article describes the defining elements of the savanna biome and...
Published: 2010
Summary 10.1002/9780470609880.ch8.abs This chapter contains sections titled: * Introduction * Hominid Exploitation of Wetlands Environments and Resources * Early Hominins: Colonization of New Environments * Plio-Pleistocene Climate Instability and...
Published: 2001
Livestock have played a pivotal and positive role in human development. Yet this has come at a heavy cost to the biological diversity of the world's rangelands and forests. Livestock grazing is the most widespread land use occurring on Earth....
Published: 2008
Summary 10.1002/9780470292136.ch7.abs This chapter contains sections titled: * Objectives for This Chapter * Introduction * Defining Biodiversity * The Economic Value of Biodiversity * Threats to Biodiversity * Efforts to Preserve Biodiversity *...
Published: 2002
Ecology and desert ecology have focused on feeding relationships within assemblages of organisms and/or the relationships of plants to the animals that feed on them. Major differences in the structure of ecosystems are a function of the proportion...
Published: 2007
Summary In this chapter, we discuss climatic fluctuations in northern and eastern Africa during the Holocene and in particular the middle Holocene. The major emphasis is on the Sahara and the mountains of eastern Africa, because the climatic changes...
Published: 2001
The phenomenon of desertification involves the loss of biological or economic productivity and biodiversity in arid and semiarid croplands, pastures, rangelands, and subhumid woodlands due mainly to nonsustainable human activities, such as...