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CIHEAM-IAMZ
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Communication à un Congrès (avec Actes)
F.B. Golley ; J. Bellot ; E.P. Odum | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989This study describes the analysis of two ecological systems of different sizes: Georgia State (USA) with 150,500 km2 and La Violada irrigation area (Huesca, Spain) with 0.5 km2. Systems analysis theory was used to interpret energy and matter flo[...]Communication à un Congrès (avec Actes)
M.A. Esteve ; L. Ramírez | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989A method of evaluation based on criteria of diversity, rarity, area, and representativity of bird and carábidos communities of the Mar Menor region (Murcia, SE Spain) has been used to define protection and management proposals for its land use p[...]Communication à un Congrès (avec Actes)
Communication à un Congrès (avec Actes)
L. Ramírez | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989Potential evapotranspiration, index of continentality, and frequency of frosts have been studied in relation to the distribution of olive trees in Spain. While index of continentality is not connected with olives groves, evapotranspiration and f[...]Communication à un Congrès (avec Actes)
P. Comin | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989Basal area, density and biomass have been studied in 17 pure stands of Juniperus thurifera and 40 mixed stands with several combinations of that species and others of the genura Pinus and Quercus in SW quarter of the province of Teruel (Aragon, [...]Communication à un Congrès (avec Actes)
A. Sala ; R. Picolo ; J. Piñol | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989Daily courses of water potential in Quercus ilex shoots are compared during a winter day in two experimental stations located at the bottom (deeper soils) and at the top (shallow soils) of a watershed in the Serra de Prades (Tarragona, Spain). I[...]Communication à un Congrès (avec Actes)
J. Bellot ; A. Escarré | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989This study attempt to simulate the effect of forest structure on the distribution of rainfall water in the soil. Nutrient supplies to the forest soil are estimated in 5 hypothetical stages of development in the Mediterranean forest, based upon t[...]Communication à un Congrès (avec Actes)
J.J. Ibanez ; C.A. Gracia | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989In this paper, a model on intraspecific competition is presented. The model is based on the concepts of areas of influence and interference. The basic hypothesis assumes that the optimisation between space occupation (maximum) and competence (mi[...]Communication à un Congrès (avec Actes)
L. Trabaud | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989The influence of fire on ecosystems of the Mediterranean Basin is analysed through the fire regime: frequency, intensity, season. The timing and periodicity of fires are extremely important in the lives of plant communities as these factors affe[...]Communication à un Congrès (avec Actes)
M. Moslam ; F. Megdiche | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989Used as a draught animal and for transportation, camel livestock has significantly regressed from 200,000 heads in the 1950's to 85,000 heads at the present time. Concentrated in the southern areas of the country, camel breeding is traditionally[...]Communication à un Congrès (avec Actes)
B.C. Diallo | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989In Mauritania, since the beginning of the years of drought, the dromedary has played an important role in the development of animal husbandry. Their number has gradually increased and presently reaches 800,000 heads, which constitutes an importa[...]Communication à un Congrès (avec Actes)
M.V. López ; J. Bellot ; A. Escarré | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989This study compares data on conductivity, pH and the enrichment factor of Ca++, Na+, K+ and Mg++ cations, coming from the sequential wash off of branches of pine, Pinus sylvestris, and holmoak, Quercus ilex, using water with a chemical compositi[...]Communication à un Congrès (avec Actes)
O. Barrantes ; C.A. Gracia | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989In this paper, one application of the Waring's method to estimate leaf area index, in Pinus sylvestris, is presented. Cross-sectional sapwood area was measured at different heights in four trees and was related to the leaf area sustained over ea[...]Communication à un Congrès (avec Actes)
L. Sierralta ; C.A. Gracia | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989The ability of a tree to use the resources of its nearest environment and as consequence of it, its ability to modify the state of those resources, is clearly related to the tree size. Such ability is expressed as the space that surrounds the tr[...]Communication à un Congrès (avec Actes)
el S.A. Gihad ; T.T. El Gallad ; A.E.O. Sooud ; H.M. Abou El Nasr ; M.F.A. Farid | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989After having gathered data from bibliography about intake, digestibility and nitrogen retention in dromedaries, a study was carried out on 2 female dromedaries, 4 rams and 4 bucks (desert breed). This work has as objective to show the effects of[...]Communication à un Congrès (avec Actes)
J. Alvarez ; M.M. Yanguas ; M.A. Rodríguez ; A. Gómez Sal | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989The territorial distribution of traditional uses and their relationship with the geophysical structure of the land are analysed. Plots of land were classified after systematic sampling and this made it possible to differentiate homogeneous areas[...]Communication à un Congrès (avec Actes)
R. Picolo | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989The height growth and aerial biomass distribution (stems and leaves) of Medicago arborea and two varieties of Atriplex nummularia (one from Tunis and the other from South Africa) are shown below. Two irrigation treatments are compared with a con[...]Communication à un Congrès (avec Actes)
A. Caritat | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989It has been described the structure of 35 plots of different woods (beeches, oak grove, mixed woods and evergreen-oak forest) located in the Natural Park of La Garrotxa (Girona). The distribution of trees in diameter classes allow us to apprecia[...]Communication à un Congrès (avec Actes)
M. Abril ; C.A. Gracia | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989The growth of resprouting individuals of two typical Mediterranean species, Pistacia Lentiscus and Quercus coccifera, was studied over an annual cycle, during the second year after burning. Growth was estimated in two ways: direct estimation of [...]Communication à un Congrès (avec Actes)
J.M. De Miguel ; M.A. Rodríguez ; A. Gómez Sal | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989From a sampling based on systematic routes, the territorial distribution of a herd of about 400 cows on a 3000 ha dehesa is analysed. The animals' preference and aggregation degree as regards homogeneous territorial areas, detected according to [...]Communication à un Congrès (avec Actes)
J.L. Remon ; B. Alvera | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989In a summer pasture above tree-line in the Pyrenees, we studied, on ten plots arranged in three altitudinal series, the relations between ruminant grazing and some traits of the organisation of grass communities, as production, biomass, standing[...]Communication à un Congrès (avec Actes)
M.A. Hussein | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989Livestock rearing is a prime activity in Somalia's rural areas and adjacent regions of Ethiopia, Kenya and Djibouti. The pastoral nomads of these regions comprise 60-70 per cent of the entire population. Despite of the importance of the camel in[...]Communication à un Congrès (avec Actes)
Hydrolisable nitrogen in forest soils: the case of a cork oak forest at Les Gavarres (Gerona, Spain)
R. Pons ; V.R. Vallejo | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989Three methods of soil nitrogen availability assessment have been compared in Mediterranean forest soils: successive hydrolysis, autoclaving and short-term aerobic incubation. The results of autoclaving were similar to those obtained in the first[...]Communication à un Congrès (avec Actes)
R. Fanlo ; C. Chocarro | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989This paper compares the relation between the cut of meadows (reaping-effect) and the rate variation of some parameters: production (total dry matter), floristic composition, percentage DM of production contributed for family and some species, et[...]Communication à un Congrès (avec Actes)
D. Richard | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989Little is known about the digestive utilisation of food by the dromedary, and the quantities of dry matter it consumes. Very few experiments are reported in publications, and the data is often not sufficient enough to make it possible to draw up[...]Communication à un Congrès (avec Actes)
F. Carceller ; M.A. Santacecilia ; V.R. Vallejo | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989Three plots have been selected in different forest ecosystems in the Moncayo Natural Park (Zaragoza): two deciduous oak forests (Quercus petraea and Quercus pyrenaica) located at an altitude of 1050 m, and a beech forest at 1300 m. Litter produc[...]Actes de Congrès ou Communication isolée
J. Bellot, ed. | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989Ce séminaire sur les bases écologiques pour la gestion de l'environnement méditerranéen se compose de trois parties. 1 : Structure des communautés de plantes. 2 : Les problèmes posés par les incendies. 3 : Régénération des communautés. 4 : Biogé[...]Communication à un Congrès (avec Actes)
J.M.G. Queijeiro | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989A methodology for landscape assessment and evaluation that has been applied in certain coastal environments of Galicia standing out for its natural value is proposed. The capacity of landscape to synthesise a great number of characteristics of t[...]Communication à un Congrès (avec Actes)
F. Gonzalez Bernaldez | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989Ecosystem management tents historically to simplification and in the long run to monospecific ecosystems. However, in developed areas and as complement to intensive soil utilisation, management of multispecific ecosystems in gaining greater impo[...]Communication à un Congrès (avec Actes)
F. Llimona | Zaragoza [Espagne] : CIHEAM-IAMZ | Options Méditerranéennes : Série A. Séminaires Méditerranéens, ISSN 0253-1542 | 1989Current wildlife resource management activities being developed at the Metropolitan Park of Barcelona are presented. These include research, improvement and public education. Research activities focus on bird density studies. In springtime birds[...]