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  • 1988  (5)
  • 1
    Electronic Resource
    Electronic Resource
    Age at menarche: the influence of environmental conditions (1988)
    Springer
    International journal of biometeorology 32 (1988), S. 33-35 
    Details
    ISSN: 1432-1254
    Keywords: Climate ; Age at menarche ; High school girls ; Environmental temperature
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Notes: Abstract Age at menarche was studied by the recollection method in two groups of Causasian Jewish high school girls, inhabitants of two towns in Israel, Safad and Elat. The two towns differ mainly in climatic conditions. The age at menarche was found to be significantly lower (P〈0.02) in the hot town of Elat than in the temperate town of Safad: 13.30±1.21 and 13.58±0.9 years, respectively (mean ±SD). A significant association was found between the age at menarche and the town in which the girls lived. Accordingly, in the hot town of Elat, the percentage of girls who had their first menstrual cycle by the age of 12 years and earlier, was more than double that of the girls in Safad (17.9% and 7.1%, respectively). It is concluded that the environmental temperature, with or without any possible interaction of humidity, is probably responsible for the tendency for an earlier onset of menarche in girls living in the hot town of Elat.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01623990
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  • 2
    Electronic Resource
    Electronic Resource
    Climate and natural production of rubber (Hevea brasiliensis) in Xishuangbanna, southern part of Yunnan province, China (1988)
    Springer
    International journal of biometeorology 32 (1988), S. 280-282 
    Details
    ISSN: 1432-1254
    Keywords: Climate ; Rubber ; Yield ; overwintering ; Growth
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Notes: Abstract According to the author's and his collaborators' investigations, the climate influences the growth of rubber trees (Hevea brasiliensis) in Xishuangbanna, the southern part of Yunnan Province, China, in at least four aspects: (1) The yield of latex per tapping and the final yield of dry rubber per tree per year or per unit area per year; (2) the growth rate, as expressed by increment of girth in cm; (3) the survival during the over-wintering period; (4) the initiation or suppression of certain diseases; In this paper the author would like to describe the influence of climatic elements on yield of latex and on survival during the over-wintering period. As for the other two aspects, only general comments are given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01080028
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  • 3
    Electronic Resource
    Electronic Resource
    Distribution of C3 and C4 grasses at different altitudes in a temperate arid region of Argentina (1988)
    Springer
    Oecologia 76 (1988), S. 273-277 
    Details
    ISSN: 1432-1939
    Keywords: Grasses ; Photosynthetic type ; Distribution ; Climate ; Altitude ; Argentina
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The distribution of native C3 and C4 grasses in a temperate arid region of Mendoza, Argentina, was studied in six areas at different altitudes. C4 species predominate at low elevations in both relative species abundance and plant cover. At high elevations C3 species are dominant in cover and composition. At medium altitudes (1100–1600 m) grass species composition is balanced but plant cover of C3 species is greater. Of 31 genera in the whole area, 19 were C4. Only the genera Stipa (C3) and Aristida (C4) were present in all the six areas surveyed. The pattern of grass distribution shows high correlation with evapotranspiration and temperature parameters, but low correlation with rainfall. The relation between grass distribution and different climatic parameters is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00379962
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  • 4
    Electronic Resource
    Electronic Resource
    A 7000-year pollen record from the Amazon lowlands, Ecuador (1988)
    Springer
    Plant ecology 76 (1988), S. 141-154 
    Details
    ISSN: 1573-5052
    Keywords: Cereal ; Climate ; Fossil pollen ; Holocene ; Palynology ; Vegetational history
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The longest continuous Amazonian palynological record (ca 7010 yrs B.P. to present) from Lake Ayauchi, Ecuador, reveals species-by-species abundance changes during a period of climatic change. Pollen influx from a wet tropical rain forest was found to be high, 1×104−105 grains cm-2 yr-1, although mature forest taxa were poorly represented. Horizons of laminated sediments and weathered gyttja, dated to ca 4200–3150 B.P., evidence a period of reduced net water availability. During this period Ficus, Alchornea and Palmae pollen representation appears to decline, although there is no evidence of a major forest compositional change. The lake was reduced to a shallow, possibly seasonal, pool. Zea cultivation was recorded between ca 2850 B.P., (the earliest paleoecological record to date in the Amazon basin) and ca 800 B.P. It is suggested that Zea was cultivated on exposed lake sediment within the crater at times of low water levels. The abandonment of Zea cultivation may have been due to rising water levels or social unrest.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00045475
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  • 5
    Electronic Resource
    Electronic Resource
    Body size variation in baboons: A reconsideration of ecological determinism (1988)
    Springer
    Primates 29 (1988), S. 135-137 
    Details
    ISSN: 0032-8332
    Keywords: Papio ; Body size ; Ecology ; Climate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Popp (1983) presented an intriguing argument regarding the covariation of body size in baboons and rainfall. However, a reanalysis of the data indicates that “Principle 2” of the model is not supported.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02380856
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