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Survey of macrophytic vegetation in North German water courses
278
Selected Abstracts
92Z/00075 Survey of macrophytic vegetation in North German water courses W. Herr, D. Todeskino & G. Wiegieb, in: Wetland ecology and management, ed D.F. Whigham & others, 0Guwer; Tasks for Vegetation Science, 25), 1990, pp 109-116. Species distribution is related to geographical factors and zonation patterns along a water course are discussed. Consideration is given to wetland conservation based on the 'regionally differentiated species deficit model' that is based on 'potential natural vegetation'. Portions of many rivers are m a highly degraded condition and there are immediate needs for protection and restoration. -from Authors 92Z/00076 Auswirkungen von Ausgleichsmassnahmen auf die Fauna eines Graben-Grunland.Gebietes bei Bremen unter besonderer Berucksichtigung der Vogel (Consequences of mitigation measures on the fauna, especially on birds, of a ditch-meadow-area near Bremen) K. Handke, Landschafl und Stadt, 22(4), 1990, pp 144-155. During the first two years of investigation the number of breeding water- and meadow birds increased in a compensation area caused by newly-created ponds, flooding of meadows during winter and extensive of grassland management. -from English summary 92Z/00077 Inleiding tot de landschapsoecologie van het zuidelijk deel van Texel (Introduction to the landscape ecology of the southern part of Texel) H. Doing, Geografisch Tijdschrifl, 24(5), 1990, pp 447-452. Includes remarks on management. -from English summary 92Z/00078 Effects of mechanical ditch mangement on the vegetation of ditch banks in Dutch peat areas A.J. Van Strien, T. Van der Burg, W. J. Rip & R. C. W. Strucker, Journal of Applied Ecology, 28(2), 1991, pp 501-513. Describes the effects of cleanin.~ frequency, cleaning method and dredging on the ditch bank vegetation. Species-richness was highest with cleaning once every 2-3 yr; 38 species, including many that axe endangered in the peat district, did better with cleaning every 2-3 yr than with yearly cleaning. Cleaning ditches once every 2-3 yr is recommended, provided this is compatible with proper water management. In all management practices, the lowest strip of the bank should be kept free from ditch sludge. -from Authors 92Z/00079 Une nouvelle menace pour les sites scientifiques et la qualite des paysages en region Wallonne: la SNCB va t'elle detruire des milieux remarquables et enlaidir nos plus belles vallees? (A new threat to sites of scientific interest and to the integrity of the countryside, Walloonia, Belgium) J. Lambinon, C. Jeuniaux & J. Belliere, Natura Mosana, 43(3), 1990, pp 61-69. In 1990, the Belgian Railways carried out major engineering works along the left bank of the Ourthe River, a protected site, without prior consultation with conservation or scientific bodies. The site has been partially covered in concrete. The Monceau Cave, an important roost for bats, is threatened. Habitats used by snakes, lizards and insects have disappeared, as have many unusual bird species. -H.Dean-Herzog
92Z/00080 Turismo suli'Aietsch, il piu grande ghiacciaio delle Alpi (Tourism on the Aletsch, the largest glacier of the Alps) P. Cipollaro, Universo, 70(5), 1990, pp 618-631. Includes description of the vegetation, and measures to conserve the natural scene. Since 1900, forest has developed upon a recent moraine. -D.J.Davis
92Z/00081 Ecological and nature protection problems of the North European seas (in Russian) G. G. Maitshov & L. G. Pavlova, lzvestiya - Akademiya Nauk SSSR, $eriya Geograficheskaya, 6, 1990, pp 52-62. Causes of the crisis state currently developing in the raw materials base of the marine industries are indicated. -P.Cooke 92Z/00082 Wetland reclamation in the Byelorussian SSR D. I. Berezkin, V. T. Klimkov, I. M. Nestercnko & J. Kvet, in: Wetland ecology and management, ed D.F. Whigham & other-% 0Kluwer; Tasks for Vegetation Science, 25), 1990, pp 45-54. Following an introduction to wetland reclamation operations and their ecological consequences (Kvet), this contribution comprises three short papers; Excessively wet soils and microclimate (Berezkin); Methods and techniques of wetland reclamation in Byelorassia (Klimkov); and Changes in the hydrophysical properties of peat soil following their drainage (Nesterenko). -P.JJarvis 92Z/00083 Living with wildlife: wildlife resource management with local participation in Africa ed A. Kiss, World Bank Technical Paper, 130, 1990, 217 pp, price US$13.95. Expanding settlements, crops, and livestock in marginal areas are reducing agricultural productivity and displacing wildlife. Conservationists and development planners are exploring a common solution: developing alternative land uses based on wildlife resources generating food and income for rural communities. -from Editor 92Z/00084 Wildlife as a crop D. Pitman, Ceres, 22(1), 1990, pp 30-35. Zimbabwe has introduced game ranching and attempts to pass on the benefits of sustainable wildlife 'cropping' and tourism to local communities. -M.Amos 92Z/00085 Plant responses to human activities in the tropical savanna ecosystem of Botswana T. Tietema, D. J. Tolsma, E. M. Veenendaal & J. Schroten, in: Ecological responses to environmental stresses, ed J. Rozema & J.A.t~. Verldeij, (Kluwer, Tasks for Vegetation Science, 22), 1990, pp 261-276. Grazing by livestock affects the species composition, pro-ductivity and microclimate of the grass layer i n t h e savanna ecosystem. It alters the competitive balance between trees and grasses in favour of trees. Competition for water and nutrients, as well as food preference of the various grazers, are used to explain the process of bush encroachment. In a degraded savanna the remaining grasses may profit from the favourable environmental conditions underneath the trees. Wood in Botswana is harvested for fuel, fencing and building material. Hasrvesting affects the population structure and species composition of the natural woodlands. Regeneration through coppicing and through seedlings is being studied. -from Authors 92Z/00086 Interfacing geographic information systems and Space Shuttle Photography for monitoring elephant impact in Botswana M.D. Nellis, K. Lulla, J. M. Briggs & C. E. Bussing,
Papers & Proceedings of Applied Geography Conferences - State University of New York atBinghamton, 13, 1990, pp 10-15. Chobe National Park is regarded as one of the most important wildlife parks in Africa. Loxodonta africana numbers have increased dramatically, and now number >50 000 in this portion of Botswana. These herds comprise one of the largest savanna elephant populations in all of ARica. Elephants destroy vegetation and peel tree bark, significantly impacting on the deciduous forests. This paper determines the use of Space Shuttle Photography, in combination with other spatial information sources, for assessing the variations in elephant impact on the forest reserves. -from Authors 92Z/00087
Wastelands mission - prioritising the tasks
M.N. Kulkami, Myforest, 26(4), 1990, pp 315-318. In the context of India, discusses: I) farm forestry (tree
Selected Abstracts
92Z/00075 Survey of macrophytic vegetation in North German water courses W. Herr, D. Todeskino & G. Wiegieb, in: Wetland ecology and management, ed D.F. Whigham & others, 0Guwer; Tasks for Vegetation Science, 25), 1990, pp 109-116. Species distribution is related to geographical factors and zonation patterns along a water course are discussed. Consideration is given to wetland conservation based on the 'regionally differentiated species deficit model' that is based on 'potential natural vegetation'. Portions of many rivers are m a highly degraded condition and there are immediate needs for protection and restoration. -from Authors 92Z/00076 Auswirkungen von Ausgleichsmassnahmen auf die Fauna eines Graben-Grunland.Gebietes bei Bremen unter besonderer Berucksichtigung der Vogel (Consequences of mitigation measures on the fauna, especially on birds, of a ditch-meadow-area near Bremen) K. Handke, Landschafl und Stadt, 22(4), 1990, pp 144-155. During the first two years of investigation the number of breeding water- and meadow birds increased in a compensation area caused by newly-created ponds, flooding of meadows during winter and extensive of grassland management. -from English summary 92Z/00077 Inleiding tot de landschapsoecologie van het zuidelijk deel van Texel (Introduction to the landscape ecology of the southern part of Texel) H. Doing, Geografisch Tijdschrifl, 24(5), 1990, pp 447-452. Includes remarks on management. -from English summary 92Z/00078 Effects of mechanical ditch mangement on the vegetation of ditch banks in Dutch peat areas A.J. Van Strien, T. Van der Burg, W. J. Rip & R. C. W. Strucker, Journal of Applied Ecology, 28(2), 1991, pp 501-513. Describes the effects of cleanin.~ frequency, cleaning method and dredging on the ditch bank vegetation. Species-richness was highest with cleaning once every 2-3 yr; 38 species, including many that axe endangered in the peat district, did better with cleaning every 2-3 yr than with yearly cleaning. Cleaning ditches once every 2-3 yr is recommended, provided this is compatible with proper water management. In all management practices, the lowest strip of the bank should be kept free from ditch sludge. -from Authors 92Z/00079 Une nouvelle menace pour les sites scientifiques et la qualite des paysages en region Wallonne: la SNCB va t'elle detruire des milieux remarquables et enlaidir nos plus belles vallees? (A new threat to sites of scientific interest and to the integrity of the countryside, Walloonia, Belgium) J. Lambinon, C. Jeuniaux & J. Belliere, Natura Mosana, 43(3), 1990, pp 61-69. In 1990, the Belgian Railways carried out major engineering works along the left bank of the Ourthe River, a protected site, without prior consultation with conservation or scientific bodies. The site has been partially covered in concrete. The Monceau Cave, an important roost for bats, is threatened. Habitats used by snakes, lizards and insects have disappeared, as have many unusual bird species. -H.Dean-Herzog
92Z/00080 Turismo suli'Aietsch, il piu grande ghiacciaio delle Alpi (Tourism on the Aletsch, the largest glacier of the Alps) P. Cipollaro, Universo, 70(5), 1990, pp 618-631. Includes description of the vegetation, and measures to conserve the natural scene. Since 1900, forest has developed upon a recent moraine. -D.J.Davis
92Z/00081 Ecological and nature protection problems of the North European seas (in Russian) G. G. Maitshov & L. G. Pavlova, lzvestiya - Akademiya Nauk SSSR, $eriya Geograficheskaya, 6, 1990, pp 52-62. Causes of the crisis state currently developing in the raw materials base of the marine industries are indicated. -P.Cooke 92Z/00082 Wetland reclamation in the Byelorussian SSR D. I. Berezkin, V. T. Klimkov, I. M. Nestercnko & J. Kvet, in: Wetland ecology and management, ed D.F. Whigham & other-% 0Kluwer; Tasks for Vegetation Science, 25), 1990, pp 45-54. Following an introduction to wetland reclamation operations and their ecological consequences (Kvet), this contribution comprises three short papers; Excessively wet soils and microclimate (Berezkin); Methods and techniques of wetland reclamation in Byelorassia (Klimkov); and Changes in the hydrophysical properties of peat soil following their drainage (Nesterenko). -P.JJarvis 92Z/00083 Living with wildlife: wildlife resource management with local participation in Africa ed A. Kiss, World Bank Technical Paper, 130, 1990, 217 pp, price US$13.95. Expanding settlements, crops, and livestock in marginal areas are reducing agricultural productivity and displacing wildlife. Conservationists and development planners are exploring a common solution: developing alternative land uses based on wildlife resources generating food and income for rural communities. -from Editor 92Z/00084 Wildlife as a crop D. Pitman, Ceres, 22(1), 1990, pp 30-35. Zimbabwe has introduced game ranching and attempts to pass on the benefits of sustainable wildlife 'cropping' and tourism to local communities. -M.Amos 92Z/00085 Plant responses to human activities in the tropical savanna ecosystem of Botswana T. Tietema, D. J. Tolsma, E. M. Veenendaal & J. Schroten, in: Ecological responses to environmental stresses, ed J. Rozema & J.A.t~. Verldeij, (Kluwer, Tasks for Vegetation Science, 22), 1990, pp 261-276. Grazing by livestock affects the species composition, pro-ductivity and microclimate of the grass layer i n t h e savanna ecosystem. It alters the competitive balance between trees and grasses in favour of trees. Competition for water and nutrients, as well as food preference of the various grazers, are used to explain the process of bush encroachment. In a degraded savanna the remaining grasses may profit from the favourable environmental conditions underneath the trees. Wood in Botswana is harvested for fuel, fencing and building material. Hasrvesting affects the population structure and species composition of the natural woodlands. Regeneration through coppicing and through seedlings is being studied. -from Authors 92Z/00086 Interfacing geographic information systems and Space Shuttle Photography for monitoring elephant impact in Botswana M.D. Nellis, K. Lulla, J. M. Briggs & C. E. Bussing,
Papers & Proceedings of Applied Geography Conferences - State University of New York atBinghamton, 13, 1990, pp 10-15. Chobe National Park is regarded as one of the most important wildlife parks in Africa. Loxodonta africana numbers have increased dramatically, and now number >50 000 in this portion of Botswana. These herds comprise one of the largest savanna elephant populations in all of ARica. Elephants destroy vegetation and peel tree bark, significantly impacting on the deciduous forests. This paper determines the use of Space Shuttle Photography, in combination with other spatial information sources, for assessing the variations in elephant impact on the forest reserves. -from Authors 92Z/00087
Wastelands mission - prioritising the tasks
M.N. Kulkami, Myforest, 26(4), 1990, pp 315-318. In the context of India, discusses: I) farm forestry (tree