|
|
Let's meet in the littoral: Diversity of symbiosis in the Verrucariaceae lichens
Schmidtová, Jana ; Škaloud, Pavel (advisor) ; Peksa, Ondřej (referee)
Lichens are organisms formed by several symbiotic partners, most importantly a fungus (mycobiont) and an alga or cyanobacteria (photobiont). Although most lichens are terrestrial, some can be found also in aquatic environments. Black crustose lichens from the family Verrucariaceae (Verrucariales, Eurotiomycetes, Ascomycota) were able to adapt to this environment very well and often dominate in the seashore near fluctuating water level. The ability of these lichens to inhabit various environments is associated with their unusually wide range of photobionts. However, this symbiont is not known to most of them. This work investigates the diversity of lichens of the family Verrucariaceae in the littoral zone of the Baltic and the North Sea coasts, the relationships between symbionts and the connection between lichen diversity and the salinity gradient. Using metabarcoding, the diversity of free-living algae in the vicinity of the studied lichens is determined and the symbiotic algae are compared with the photobionts found in the lichens. Mycobionts and photobionts were identified using ITS and 18S rDNA. A total of nine lineages of mycobionts and photobionts were found. The most common lichen turned out to be the species Hydropunctaria maura with its photobiont Pseudendoclonium submarinum. For several...
|
|
|
Differences in the resolution of sea territories conflicts in areas with energy resources
Bančanský, Andrej ; Karlas, Jan (advisor) ; Parízek, Michal (referee)
Energy security is an important phenomenon of the contemporary world. A significant number of oil and gas reserves are located on the seabed. Expansion of oil and gas drilling to deeper and from shore more remote locations can again raise the question of ownership of these deposits. On one hand, there are regions of the world where these disputes over borders of maritime territories escalate into a series of clashes and incidents. On the other hand, there are other areas where states can settle their disputes and cooperate on drilling. The goal of this study is to determine which factors lead to the fact that particularly in the South China Sea disagreement about the boundaries of maritime territories results in the escalation of disputes in comparison with the regions of the North Sea and the Caribbean Sea, where disputes are solved or minimized. These factors are represented by six variables, which are based on three theories: a realist, idealist and constructivist theory of international relations. The first part of this study describes the historical development of current international maritime law with regard to the territorial division of the world's oceans. It is followed by a description of three case areas. The second part deals with the theoretical foundations of the examined factors. In...
|
|
|
Differences in the resolution of sea territories conflicts in areas with energy resources
Bančanský, Andrej ; Karlas, Jan (advisor) ; Parízek, Michal (referee)
Energy security is an important phenomenon of the contemporary world. A significant number of oil and gas reserves are located on the seabed. Expansion of oil and gas drilling to deeper and from shore more remote locations can again raise the question of ownership of these deposits. On one hand, there are regions of the world where these disputes over borders of maritime territories escalate into a series of clashes and incidents. On the other hand, there are other areas where states can settle their disputes and cooperate on drilling. The goal of this study is to determine which factors lead to the fact that particularly in the South China Sea disagreement about the boundaries of maritime territories results in the escalation of disputes in comparison with the regions of the North Sea and the Caribbean Sea, where disputes are solved or minimized. These factors are represented by six variables, which are based on three theories: a realist, idealist and constructivist theory of international relations. The first part of this study describes the historical development of current international maritime law with regard to the territorial division of the world's oceans. It is followed by a description of three case areas. The second part deals with the theoretical foundations of the examined factors. In...
|
guest ::
