Yazar "Aksoy, Ahmet" seçeneğine göre listele

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    Öğe
    AEGEAN GRASSLANDS AS ENDANGERED ECOSYSTEMS IN TURKEY
    (Pakistan Botanical Soc, 2012) Ozturk, Munir; Altay, Volkan; Gucel, Salih; Aksoy, Ahmet
    In all 86 grasslands were investigated in the Aegean region of Turkey. Out of these 10 are found among the red-pine, black-pine, beech-fir, oak-pine and degraded oak-maqui forests. A total of 699 taxa of plants belonging to 68 families are distriburted in these grasslands. Out of these taxa only 104 are of good fodder value, 66 taxa belonging to the family Fabaceae and 38 to Poaceae. Aboveground biomass production in Aydin (139.18 g), Balikesir (122.68 g) and Canakkale (103.78 g) was maximum in Spring, whereas belowground values for Aydin (80 g) and Canakkale (80 g) were highest during spring and for Balikesir (80 g) during winter. In the provinces of Izmir (1144 g), Kutahya (400 g), Usak (800 g), and Manisa (1312 g) aboveground biomass production was highest during Autumn, whereas belowground production was maximum during winter at Usak (600 g), Izmir (1360 g), and Kutahya (910 g). In Denizli aboveground biomass production was higher in summer (400 g) and belowground in autumn (350 g). The biomass production in general was highest in the fenced as compared to open areas. The calorific values of the species in the fenced areas too were higher (107.2 cal.) as compared to the open areas (99.40 cal.). Borulceagac and Maltepe were the best areas from the point of view of calorific values. The grasslands of Isikeli, Pamucak, Karateke, Halitpasa, Urganli, and Gullucam were observed to be the best as regards the biomass production. However, nomadic activities like summer grazing, trampling and summer tourism are exerting a great pressure on these, leading towards a degradation and ultimately a loss of eco-diversity in the grassland ecosystems of the region. This paper enlightens the general plant composition and biomass potential of Aegean grasslands.
  • [ N/A ]
    Öğe
    Aegean grasslands as endangered ecosystems in Turkey
    (2012) Munir, Ozturk; Altay, Volkan; Gucel, Salih; Aksoy, Ahmet
    In all 86 grasslands were investigated in the Aegean region of Turkey. Out of these 10 are found among the red-pine, black-pine, beech-fir, oak-pine and degraded oak-maqui forests. A total of 699 taxa of plants belonging to 68 families are distriburted in these grasslands. Out of these taxa only 104 are of good fodder value, 66 taxa belonging to the family Fabaceae and 38 to Poaceae. Aboveground biomass production in Aydin (139.18 g), Balikesir (122.68 g) and Canakkale (103.78 g) was maximum in Spring, whereas belowground values for Aydin (80 g) and Canakkale (80 g) were highest during spring and for Balikesir (80 g) during winter. In the provinces of Izmir (1144 g), Kutahya (400 g), Usak (800 g), and Manisa (1312 g) aboveground biomass production was highest during Autumn, whereas belowground production was maximum during winter at Usak (600 g), Izmir (1360 g), and Kutahya (910 g). In Denizli aboveground biomass production was higher in summer (400 g) and belowground in autumn (350 g). The biomass production in general was highest in the fenced as compared to open areas. The calorific values of the species in the fenced areas too were higher (107.2 cal.) as compared to the open areas (99.40 cal.). Borulceagac and Maltepe were the best areas from the point of view of calorific values. The grasslands of Isikeli, Pamucak, Karateke, Halitpasa, Urganli, and Gullucam were observed to be the best as regards the biomass production. However,nomadic activities like summer grazing, trampling and summer tourism are exerting a great pressure on these, leading towards a degradation and ultimately a loss of eco-diversity in the grassland ecosystems of the region. This paper enlightens the general plant composition and biomass potential of Aegean grasslands.
  • Küçük Resim
    Öğe
    Effects of Exogenous Glycinebetaine and Trehalose on Cadmium Accumulation and Biological Responses of an Aquatic Plant (Lemna gibba L.)
    (Springer International Publishing Ag, 2011) Duman, Fatih; Aksoy, Ahmet; Aydin, Zeki; Temizgul, Ridvan
    This study aimed to investigate and compare the effects of exogenous glycinebetaine (GB) and trehalose (TR) on the biological responses of duckweed (Lemna gibba L.) against cadmium (Cd) accumulation. Duckweed samples were exposed to 0.5, 1, and 3 mM of Cd for 6 days in the presence and absence of GB (0.5, 1, 2, and 5 mM) or TR (0.5, 1, 2, and 5 mM). The accumulation of Cd, GB, and TR were investigated, and their influence on the rates of lipid peroxidation, photosynthetic activity, proline content and enzymatic antioxidant performance was examined. Two-way ANOVA showed that exposure to Cd and/or GB or TR caused an increase in Cd accumulation concentration dependently. TR had significant effects on Cd accumulation. The application of 0.5 mM TR increased Cd accumulation, whereas 5 mM decreased Cd accumulation. However, Cd accumulation was not significantly affected by the presence of GB. Cd concentration alone or in combination with GB or TR had a significant effect on lipid peroxidation, photosynthetic activity, proline content, and antioxidant enzyme activities. In addition, statistically significant GB-Cd and TR-Cd interactions were observed. We conclude that both GB and TR play protective roles against Cd stress in aquatic plants. The use of a low level of TR (i.e., 0.5 mM) may be more useful than GB in phytoremediation studies.