Planet Twylo

Chapter Seven: Marine Ecology of Twylo

The marine ecosystem of Twylo functions by means of interaction of different aquatic communities. It is conditioned by the geophysical, climatic and biological factors.

The migratory process within the ocean is dependent upon the currents, which in turn are conditioned by the meteorological phenomena, and upon the underwater physical features -continental shelves, ridges, volcanic formations. Because there is no significant isolation in an oceanic environment, the migration of the organisms and, consequently, the interchange among different communities is much more likely than in a terrestrial environment.

A subtle ecological balance exists in each underwater community, that may be otherwise described as a dynamic equilibrium. It should be noted that the balance can be easily disrupted by Twylo's underwater volcanic activities which are followed by an increase, in the aquatic environment, of the chemical elements that are normally not proper to it. The resulting changes, affecting most notably the primitive microorganisms, often threaten to destroy the established food chain patterns.

Migration is another important phenomenon affecting the aquatic ecosystem. Movement of various organisms, either individually or in groups, can lead to dramatic changes within the communities where these organisms are introduced. The migration of a predator, for example, has a potential for wiping out a whole population of a species that has not had an evolutionary chance to develop certain kinds of protection. The resulting extinction results in the subsequent extinction of a predator native to the community. Eventually, however, a new form of dynamic equilibrium is achieved.

On Twylo, one can single out two kinds of aquatic communities: those of continental shelves and those of deep underwater regions. The shelf ecosystem depends to a certain degree on the photo synthetic activities of algae, while the ecosystem of the deep layers is based on the microorganisms, which form the initial link in the food chain.

The ecosystems forming around the volcanic islands are the third kind of aquatic communities. Due to the relative isolation, each island formation possesses an aquatic ecosystem with certain particular peculiarities proper only to that formation. Due to the evolutionary process, a variety of species can be found with clear signs of a common origin, which tells about their migratory origins.

Thus, it is seen that Twylo possesses a rich and interesting marine ecosystem. It is governed by the basic laws of nature that provide the dynamic equilibrium within each individual community as well as within the global ecosystem itself. The system is in the process of constant evolution due to factors such as migration, geologic activity, and climatic factors.

Chapter Eight: Twylo's Land Plants


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