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Resultados 301-310 de 345
Pollution prevention in Colorado commercial greenhouses
1998
Panter, Karen L. | Newman, Steven Earl | Waskom, R. M (Reagan McTier)
Causes and consequences of mangrove deforestation in the Volta Estuary, Ghana: some recommendations for ecosystem rehabilitation.
1998
Rubin, J. A | Gordon, C. | Amatekpor, J. K.
The damming of the Volta River has resulted in reduced flooding and an increase in mangrove cutting, accompanied by the virtual collapse of agriculture and fishing in the estuary. Another ecological consequence of the reduced level of flooding has been reduced dispersal of seedlings of the principal mangrove, Rhizophora racemosa. Therefore, after cutting of this species, recolonization is either by conspecifics growing at very high densities or by one of a number of weed species, particularly Typha domingensis, Acrostichum aureum, Paspalum vaginatum, Cyperus articulatus, Sesuvium portulacastrum and Philoxerus vermicularis. Environmental data collected in the vicinity of the mangroves and each of the weed species have enabled suggestions to be made as to whether R. racemosa or Avicennia africana would be the more suitable mangrove to replant. Recommendations have also been made to introduce the palm Nypa fruticans to the area, together with the development of nature-based tourism, both of which would provide alternative means of income generation, thereby reducing the need to cut remaining mangroves.
Mostrar más [+] Menos [-]Drinking water supply and agricultural pollution
1998
Schrama, Geerten J. I.
Lamellar minispheres - experimental device for the simulation of the impacts of elevated CO2. Technical report
1998
Urban, O. | Pavelka, M. | Janous, D. (Akademie Ved, Brno (Czech Republic). Ustav Ekologie Krajiny)
The life history strategy reflected in morphology, biomass allocation and standing crop of Athyrium distentifolium
1998
Fiala, K. | Tuma, I. (Akademie Ved, Brno (Czech Republic). Ustav Ekologie Krajiny) | Pande, K.
Determination of soil hydrolimits in spruce stand soil profile in the Beskids Mts. [Czech Republic]
1998
Novak, F. | Kalcik, J. (Akademie Ved, Ceske Budejovice (Czech Republic). Ustav Pudni Biologie) | Rauch, O.
The soil water retention potentials and other hydrolimits of individual soil horizons of podzolized soil were determined in the stand of Picea abies (Mecuvka, the Beskids, Czech Republic) on godulic sandstone. Different hydropedologic characteristics for the individual soil horizons were found. Extreme values were detected for the albic E horizon, which importance for water and nutrient status of forest stand on podzolic soil is discussed.
Mostrar más [+] Menos [-]Athmospheric deposition and soil solution chemistry on plots of third monitoring level in the Sance watershed, Beskids Mts. [Czech Republic]
1998
Moravcik, P. (Ustav pro Vyzkum Lesnich Ekosystemu, Jilove u Prahy (Czech Republic))
Hydric regime of mountainous spruce forest stand
1998
Tuzinsky, L. (Technicka Univ., Zvolen (Slovak Republic). Lesnicka Fakulta)
Analysis of incidence of extraordinary sums of precipitation at the Bily Kriz station [the Moravian-Silesian Beskids Mts., Czech Republic] in 1997
1998
Roznovsky, J. (Mendelova Zemedelska a Lesnicka Univ., Brno (Czech Republic))
The growth of Calamagrostis villosa at different localities in the Moravian-Silesian Beskids Mts. [Czech Republic]
1998
Holub, P. (Akademie Ved, Brno (Czech Republic). Ustav Ekologie Krajiny) | Pande, K.
