Recognition and development of traditional medicine in Tanzania.

The aim of this paper is to trace developments in Traditional Medicine (TM) and legislation concerning conservation and use of biodiversity in Africa, with Tanzania as a case study. Based on field trips, interviews with different actors, site visits, and literature we explored the history, current status, re-establishment, and development of TM. A summary of laws and regulations concerning forests, access and benefit sharing is presented. During the last decade the Government of Tanzania put forth legislation to address national health needs, traditional knowledge, and the resource base for TM (e.g., practitioners, biodiversity). Our findings indicate that TM is the most common form of health care, and that the HIV pandemic has highlighted the need to work across health sectors. New legislation has facilitated this need. In Tanzania TM is experiencing a renaissance in being formally recognized, integrated into mainstream health care, formal establishment of practitioners, and gaining the interests of different sectors. More studies on bioactivity, safety, domestication, and sustainability of use of medicinal plants are needed. Development of TM can also, other than making a significant contribution to health care and livelihoods, provide income possibilities. It is however yet to be seen if the recent regulations can be made fully operational and implemented.

Medicinal plant diversity and use in the highlands of Dolakha district, Nepal.

This paper presents the ethnomedical uses of wild species among nine rural communities managing local forest resources in the Bonch Village Development Committee (VDC), Dolakha district, Nepal. Local communities possess knowledge of 113 medical remedies derived from 58 species belonging to 40 families to treat a wide range of ailments. A review of literature indicated that 56 medical remedies reported in this paper are new. Most medicines were prepared in the form of juice and were administered orally. Roots and leaves were the most frequently used plant parts. Local people were familiar mostly with the species dealing with common ailments particularly cough/cold, digestive problems, fever, headache, and skin infections. Complex ailments were treated by traditional healers. Haphazard harvesting and over-exploitation of commercial species were also reported. Sustainable harvesting methods and domestication of potential commercial species require attention in the local forest operational plans. The present study indicates that the area harbors a high diversity of medicinal plants. Despite gradual socio-cultural transformation, local communities still possess substantial knowledge of plants and their uses. The reliance on folk medicines for health care is associated with the lack of modern medicines and medication, poverty and the traditional belief of its effectiveness. Since there is a lack of phyto-therapeutic evidence for many of the species, we recommend that phytochemical and pharmacological studies be carried out in order to confirm the validity of properties attributed to these species: this is particularly relevant for species with market potential beyond the district. With setting up management plans for their extraction, these medicinal resources can provide for both subsistence needs and income. This, however, requires detail assessment of resource quantities, productivity potential, sustainable harvesting methods, domestication possibilities, market value of potentially promising species, and importantly, equitable benefit sharing regimes.

Ethnoveterinary medicines for cattle (Bos indicus) in Bulamogi county, Uganda: plant species and mode of use.

In this paper, we present an inventory and the mode of use of plants to treat cattle. This study was carried out in Bulamogi county of Uganda, using methods consisting of semi-structured interviews employing a checklist of questions, questionnaires, direct observations, and biological inventories. Farmers employ both traditional and western medicine to treat their animals. The local people identified 33 different diseases, and had herbal treatments for nine of these. Some of the diseases mentioned by farmers indicated symptoms of diseases. Thus, the naming of diseases by local people when compared to the western veterinary medicine system, at times did not distinguish between diseases and symptoms of diseases. This is because the local disease nomenclature is based on symptoms of diseases, whereas under western veterinary science diseases are named according to aetiological information. As for traditional medicine, we report for the first time the use of 38 plant species, distributed in 37 genera and 28 families, to treat the common cattle diseases in Bulamogi. Most of these plants grow wild (76.3%), are indigenous (68.4%) and are shrubs (60.5%). The plant parts most frequently used for treating cattle are roots (37.5%) and leaves (27.5%). Medications are mostly prepared as infusions and seldom as decoctions. Topical application of some medicines is practised as well. The species used to treat cattle are also used to treat some human ailments and have some other uses as well. Most of the curative species reported here are directed at treating East Coast fever (ECF), a disease known to cause high fatalities in cattle.

The return of the giants: ecological effects of an increasing elephant population.

Northern Botswana and adjacent areas, have the world's largest population of African elephant (Loxodonta africana). However, a 100 years ago elephants were rare following excessive hunting. Simultaneously, ungulate populations were severely reduced by decease. The ecological effects of the reduction in large herbivores must have been substantial, but are little known. Today, however, ecosystem changes following the increase in elephant numbers cause considerable concern in Botswana. This was the background for the "BONIC" project, investigating the interactions between the increasing elephant population and other ecosystem components and processes. Results confirm that the ecosystem is changing following the increase in elephant and ungulate populations, and, presumably, developing towards a situation resembling that before the reduction of large herbivores. We see no ecological reasons to artificially change elephant numbers. There are, however, economic and social reasons to control elephants, and their range in northern Botswana may have to be artificially restricted.

Elephant dung decomposition and coprophilous fungi in two habitats of semi-arid Botswana.

In order to understand the impact of habitat changes on ecosystem processes caused by increased populations of elephants, elephant dung decomposition was studied in semi-arid Botswana. Dung decomposition rates were studied with and without the presence of arthropods, using pairs of exposed dung and dung enclosed in nylon-mesh bags, respectively. Dung decomposition rates were lower in the absence of arthropods. The rates in the late wet season were higher in the scrubland than in the woodland. In the early dry season, immediately after the wet season, the rates were higher in the woodland than in the scrubland. The difference in decomposition rates between habitats was attributed to microclimatic conditions created by vegetation cover. With regard to fungal succession, Cladosporium cladosporioides and Eurotium brefeldianum occurred only in the late stages of dung decomposition whereas Talaromyces helicus, Cercophora coprophila and Sporormiella minima occurred in all the stages. Although there was no significant difference in Shannon-Weiner fungal species diversity index between habitats, seasons, dung ages and laboratory incubation periods, there were significant differences in fungal community composition between these parameters. Species richness was higher in the late wet season than in the early dry season, indicating the importance of moist conditions for a large diversity of fungal species.

Endemic Mimosa species can serve as mycorrhizal "resource islands" within semiarid communities of the Tehuacán-Cuicatlán Valley, Mexico.

This paper explores if Mimosa species (Fabaceae-Mimosoideae) can serve as arbuscular mycorrhizal (AM) and nutrient "resource islands" in six plant communities in the semiarid valley of Tehuacán-Cuicatlán, Mexico. Spatial heterogeneity related to the occurrence of Mimosa species results in temporal differences in AM-fungal spore numbers and soil nutrients. A higher number of AM-fungal spores were found in the soil below the canopies of six endemic Mimosa species than in the soil from non-vegetated areas. For four species, Mimosa adenantheroides, Mimosa calcicola, Mimosa luisana and Mimosa polyantha, the soil below their canopies had more AM-fungal spores than the soil in non-vegetated areas during the wet season than during the dry season. Two species, Mimosa lacerata and Mimosa texana var. filipes, however, had more spores under their canopies during the dry season than during the wet season. Although physical differences are present within and between sites, in general the soil below the canopies of Mimosa species had significantly higher nutrient levels than the soil from non-vegetated areas. Mimosa species thus form "resource islands" that are not only rich in nutrients but also in mycorrhizal propagules. Mimosa species can serve as mycorrhizal "resource islands" by directly affecting AM-fungal spore dynamics and/or by serving as spore-traps. A range of plants associated with Mimosa species may benefit from the higher number of AM propagules. We believe that the use of Mimosa resource islands as an option for biodiversity conservation and for land restoration ought to be considered in the Valley.

Mycorrhizal plants of traditionally managed boreal grasslands in Norway.

This paper reports on the mycorrhizal status of 82 plant species growing in traditionally managed grasslands in three different locations in the boreal and boreo-nemoral vegetation zone in the eastern part of Norway. Seventy-four species were found to have arbuscular mycorrhiza (AM). To our knowledge, we report AM for the first time in Achillea ptarmica, Ajuga pyramidalis, Alchemilla glaucescens, Carex brunnescens, Carex pallescens, Crepis praemorsa, Hieracium lactucella, Rumex longifolius, Scorzonera humilis, Trifolium aureum and Trifolium spadiceum. The rare and threatened species Arnica montana, S. humilis, C. praemorsa, Gentianella campestris, Parnassia palustris, T. aureum and T. spadiceum, all confined to grasslands, were found to possess AM fungi.

Mycorrhizal perennials of the "matorral xerófilo" and the "selva baja caducifolia" communities in the semiarid Tehuacán-Cuicatlán Valley, Mexico.

We investigated the mycorrhizal status of perennial xeric plant species occurring in the "matorral xerófilo" (arid tropical scrub) and the ecotone of the "selva baja caducifolia" (tropical deciduous forest) communities in the semiarid valley of Tehuacán-Cuicatlán, south-central Mexico. The perennial species examined are dominant/codominant elements within the "matorral xerófilo" and the "selva baja caducifolia", both endangered communities in the Biosphere Reserve Tehuacán-Cuicatlán Valley. Of the 50 sampled species, 45 were mycorrhizal. To our knowledge, we report arbuscular mycorrhizae (AM) for the first time in 37 species, of which 21 are endemic to Mexico and nine are endemic to the Valley. We also report AM for the first time in three genera, Buddleja, Hechtia and Zornia, and in one plant family, Buddlejaceae. Beaucarnea gracilis, a threatened species, and Mimosa purpusii, a potentially rare species, are both mycorrhizal. This is the first study of the mycorrhizal status of plant species within the Valley.