Search results for "Parmelia sulcata"
showing 4 items of 4 documents
Dažādo metālisko elementu noteikšana ķērpjos (Parmelia sulcata) Kupravas apkārtnē
2022
Dažādu metālisko elementu noteikšana ķērpjos (Parmelia sulcata) Kupravas apkārtnē. Freimanis R., zinātniskā darba vadītājs Ķīm. mag. Lazarenko V. Bakalaura darbs, 31 lpp., 7 attēli, 9 tabulas, 28 literatūras avoti, 3 pielikumi. Latviešu valodā. Bakalaura darba izstrādes ietvaros, tika analizēts dažādo metālisko elementu saturs lapu ķērpju sugā (Parmelia sulcata) Kupravas apkārtnē. Tika izvēlētas trīs dažādas Kupravas apkārtnes teritorijas – bijušās Kupravas drenu cauruļu rūpnīcas teritorija, Kupravas dzīvojamais rajons, bijušajā militārās armijas daļa un Strautu mežs, kas atrodas ~6 km attālumā no Kupravas, kā tīrāka teritorija. Metālisko elementu saturs ķērpjos (Parmelia sulcata) tika note…
Chlorophyll a Fluorescence Emission, Xanthophyll Cycle Activity, and Net Photosynthetic Rate Responses to Ozone in Some Foliose and Fruticose Lichen …
2000
The lichens Parmelia quercina, Parmelia sulcata, Evernia prunastri, Hypogymnia physodes, and Anaptychia ciliaris were exposed to ozone (O3) in controlled environment cuvettes designed to maintain the lichens at optimal physiological activity during exposure. Measurements of gas exchange, modulated chlorophyll (Chl) fluorescence, and pigment analysis were conducted before and after exposure to 300 mm3 (O3) m−3, 4 h per d for 14 d. No changes in the efficiency of photosystem 2 (PS2) photochemistry, the reduction state of QA, or the electron flow through PS2, measured by Chl fluorescence, were detected in any of the five lichen species studied. Additionally, neither photosynthetic CO2 assimila…
Chlorophyll a fluorescence in transplants of Parmelia sulcata Taylor near a power station (La Robla, León, Spain)
2006
Healthy thalli of Parmelia sulcata Taylor were transplanted to 8 localities in the surroundings of a power station (La Robla, León, Spain), the sole pollution source in the region. Changes in chlorophyll a fluorescence were monitored in the transplants 12 months, 18 months and 24 months after transplantation. Statistically significant differences were observed in the ratio of variable to maximal fluorescence, non-photochemical fluorescence quenching and vitality index. The decrease in fluorescence parameters was higher in the localities of Cuadros and Rabanal de Fenar, which are situated a few kilometres away from the power station and in the same direction as the prevailing winds.
Morphological determination of the phototrophic community composition of biological soil crusts in coastal sand dunes in northern Germany
2022
This dataset comprises the microbial community composition of biological soil crusts in north-German sand dunes. For this we obtained enrichment cultures of phototrophic microorganisms, by placing fragments of biocrusts of the same Petri dishes as used for sequencing, in Petri dishes with Bold Basal (1N BBM) agarized medium (Bischoff and Bold 1963). Cultures were grown under standard laboratory conditions: with a 12-hour alteration of light and dark phases and irradiation of 25 μmol photons m-2 s-1 at a temperature 20 ± 5 ºС. Microscopic study of these raw cultures began in the third week of cultivation. Morphological examinations were performed using Olympus BX53 light microscope with Noma…