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Dragonflies
The dragonfly – a fascinating hunter with incredible skills: with its iridescent wings, which make up two per cent of its body weight, it manoeuvres artistically in the air and serves as a model for ultra-lightweight design. A survival specialist that has been dwelling on earth for 320 million years.
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Biodiversity
The exact numbers of plant and animal species on earth are unknown. What we do know, though, is that there is a dramatic decline in the variety of species mainly triggered by man. The "threats to biodiversity" as well as their causes are the topics of this film. It illustrates the reckless exploitation of the resources of the earth on land and in the oceans.
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Bats
Bats are the only mammals that can fly actively. In mythology they represent the dark element and were the inspiration behind the invention of vampire stories. On account of their nocturnal way of life and their dark appearance, they are considered scary by many people. But the nocturnal hunters are by no means keen on human blood. They mainly hunt insects, thus assuming an important role as natural pest controllers.
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Ecosystem Lake
Lakes are stagnant waters that look quite peaceful to us. But the quiet is deceptive: above and below the water surface, life is anything but peaceful. Phytoplankton and zooplankton are eaten by small predators such as polyps or hydrachnidiae. Toebiters, dragonfly and beetle larvae are food for the water scorpion. As every animal feeds on different prey and in turn is eaten by various predators, a food web is created. The amount and variety of the lake inhabitants depends on the concentration of nutrients. In clear lakes, aquatic plants may spread down to a depth of 10 metres. Different zones with particular plant species are clearly visible. Also animals above the water profit from the rich underwater life, for example the waterfowl. Ever since the lake was formed, wind and waves have been carrying dead plants and animals to the shore, where they have sunk down and decomposed. At the same speed at which the lakeside grows, the water surface of the lake shrinks. With its extensive additional material the didactic DVD is ideally suited for use in the classroom.
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Blossoms
In impressive pictures several interesting biological topics are conveyed by this film: knowledge of the structure of blossoms, their variety of forms as well as significance and purpose of their colours and scents. Thus it becomes comprehensible why blossoms are so differently structured, how self pollination is avoided and which evolutionary achievement is behind the symbiotic interaction between blossoms and pollinators. Pollination is a “deal“: the plant offers the insects nectar in exchange for the transport of the pollen. Prerequisite for this is the mutual adaptation process of the blossom to the mouthparts of the insect and vice versa. That cheating goes on during this “business relationship” between plant and animal is illustrated with the example of flower mimesis. The perfect way in which blossoms succeed in attracting insects without offering them nectar in return is another highlight of this film. Together with the extensive accompanying material the DVD is perfectly suited for use in the classroom.
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Basics of BIOLOGY I
Basics of Biology examines general biological issues that help to expand and consolidate basic biological knowledge. The first film of this series deals with the structure of the plant cell. It centres around the structure and function of plant tissue such as the xylem, root cells and stomata as well as the functions of the chloroplasts. In the second chapter the issue of photosynthesis and the elements involved in it are dealt with. With tests and experiments impacts of light and CO2 on photosynthesis are demonstrated and explained. The third part explains human respiration. The rising oxygen consumption of a woman athlete brought on by physical effort on the moving walkway is shown. What happens when the physical stress becomes too strong and the amount of oxygen inhaled is no longer sufficient? The transition from aerobic respiration to anaerobic respiration is vividly illustrated. Together with the extensive accompanying material the didactic DVD is ideally suited for use in the classroom.
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Basics of Biology II
In its first chapter, Basics of Biology II deals with the food chain. The producers as the basis of the food chain and the consumers, the herbivores and carnivores, are introduced /presented. Further focus points are the energy intake through food as well as the energy losses connected with it. The resulting energy efficiency of a herbivore is vividly illustrated in an experiment. Subsequently the carbon cycle is dealt with: its occurrence and the carbon cycle from producer to consumer, and last but not least the function of destruents. In the third chapter the next important cycle, the nitrogen cycle, is discussed. Special emphasis is put on the process of nitrification as well as the function of nitrogen-binding micro-organisms and their natural fertilisation of our agricultural soil. The importance of the nitrate for plants is shown in a laboratory test. Together with the extensive additional material the DVD is ideally suited for use in the classroom.
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Mute Swan
Swans are an ornament to our waters. The majestic birds with their snow-white plumage are considered the very epitome of beauty and purity. Not every swan, however, is white. It is the Mute Swan that has inspired people’s imagination for ages. Seemingly an old acquaintance, it has nevertheless a great many unknown features for us to discover.
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Basics of Biology III
What is the importance and function of enzymes? The lock-and-key principle is explained and, based on amylase and katalase, the dependence of reaction speed and intensity of effect on temperature and pH-value can be seen. With microscopic pictures and graphs the structure of animal cells is explained. But their appearance is very different depending on their functions. Nerve cells differ from blood cells just like the latter from sperm cells. A tissue is a combination of many cells that perform specific functions in the body. Any kind of growth of an organism is only possible when new cells are created. The process of cell division is called mitosis. This is then differentiated from the multiplication of reproductive cells, as in them the number of chromosomes must be reduced to half. Impressive shots and graphs illustrate these processes. Together with the extensive accompanying material the DVD is ideally suited for use in the classroom.
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MedienLB has been producing award-winning school films and interactive modules for the classroom since 2006.
Penguins
Most people know penguins only from the zoological garden. There they arouse many visitors’ interest. This is, on the one hand, because of their peculiar black-and-white colouring, which reminds you of a tail coat, on the other hand, because of their upright walk. We find penguins amusing or funny; but if we knew more about their extraordinary skills, we would not laugh about them but gaze at them in wonder and reverence.
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Parasites
Parasites are not a small group of organisms, as many believe. Parasitism is a specific mode of life in which one creature, a parasite, lives on another creature and feeds on it. Apart from well-known parasites such as ticks or bed bugs, also animals like the cuckoo or the ichneumon fly and plants, for example the mistletoe, live parasitically. With a lot of animations, recordings and microscope images the film illustrates how this ectoparasitic way of life evolves, to what extent the parasites deprive their hosts and what other living organisms engage in parasitism, too. Humans easily become hosts to parasites and the latter can transmit serious diseases. The malaria cycle and the danger of ESME are described and preventive measures that can be taken are shown.
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Ecosystem Bog
Bogs are rough, sparse and inaccessible regions, neither water nor land. This applies in particular to raised bogs. One wrong step in this soaking wilderness might be fatal. How a bog is formed was unknown to people for thousands of years. After the last ice age, that is about 10,000 years ago, bog formation began. Enormous amounts of water were released as a consequence of the melting of the ice shields.
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