National Repository of Grey Literature 3 records found  Search took 0.00 seconds. 
Changes in epiphytic lichen biota in the Czech Republic with emphasis on current situation
Hronová, Nikola ; Malíček, Jiří (advisor) ; Palice, Zdeněk (referee)
During the last two centuries a significant change of lichen communities has happened in the Czech Republic. Important factors which had influencing the lichen biota in the past and recently are summarized in this bachelor thesis. Acid rain caused by high imissions of SO2 a NOx was the most important factors of change of species and remaining acidification of substrates is still influencing lichen communities. Until the end of 80's of 20th century acid rain was a dominant factor influencing lichens. Afterwards, thanks to drop of its intensity in 90's of 20th eutrophication and availability of nitrogen in landscape became dominant influencing factors. All these factors mainly affected the communities of macrolichens, and especially cyanolichens to such an extent that some species in the Czech Republic became extinct. Recently the increasing availability of nutrients has been supporting the spread of nitrophilous species. Due to decrease of SO2 emissions to values from the end of 19th century some areas have been recolonized and some endangered species have returned. The transformation of lichen communities has also been significantly affected by forest management and land use. Based on changing climate and change of natural habitats a further decline mainly of suboceanic species is expected. A more...
Plant response to stress: Acid rains (didactic work on the topic - secondary school level)
HRADECKÝ, Jan
The theoretical part of this thesis deals with the topic of Plants and Stress describing and discussing not only reactions of plants to acid rains, but also to exposure to other various kinds of stress. The topic of acid rain is discussed in an entire chapter in which the main problems caused by its influence on plants are described. This is followed by a dissection of high-school literature and sources that are focused on the subject. Apart from the theoretical part, the thesis also contains: 1) an explanatory sheet to be used by teachers as a teaching material; 2) students{\crq} worksheets to support teachers{\crq} explanation and to be used as subsequent learning materials; 3) laboratory exercise worksheets designed to lead students during a practical examination; 4) a final test checking what students have learned.
How plants cope to stress: Odour (didactic work - basic school level)
NEJEDLÁ, Veronika
The purpose of this diploma work is preparation attractive working sheets, which approximate to the pupils of the primary school amusing form one actual ecological problem in the empire of the herbage. Working sheets are divided into four parts. Every part contains at first the theoretic pieces of knowledge and then their exercises. The theory includes the topic of vegetable essential oils and their tasks in vegetable stress. This subject is processed from the view to knowledge of the pupils from primary scholls. Contribution of working sheets is experimentally checked-out practically. By two sets of pupils is given test to check the level knowledge {--} by those, who working sheets worked up and to the control group of the pupils, who didn´t work with working sheets. Test results are compared.