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  • 1. Saturday April 2nd to Saturday 9th Cooperation between Frankfurt and Parentis1
  • 2. Ecosystems of the Atlantic coast◊ Shells of the foreshore beach p3◊ How is a dune shaped ? p4◊ Landscape reading p5◊ Arthropods p6◊ Tide mark p7 Ecosystems are dynamic◊ Parabolic dune p8◊ Barkhane p9◊ Arcachon harbour : lagoon p10◊ Beach dune p11◊ Paleoenvironmental element p12◊ Human influence, ONF p132
  • 3. The ShellsShells can be totally different. Itdepends on where they live. Monday, 4th April 2011.When you have bigger andthicker shells you can say thatthey lay on a beach with veryhigh and rough waves. You canalso see them when the grainsof sand are very thick. Whenyou’re on a calm beach withvery thin sand, the shells arevery very small. On our firstday, Monday, the beach with thehigh waves, we found 5 differ-ent types of shells on the Cou-rant d’Huchet. Tellina crassa Glycymeris Cardium norvegicum Donax Vittatus 3 From Marion, Maria, Gaëlle and Arianne
  • 4. How is a dune shaped? Lukas, Maël, Derya and Corentin. Tuesday April 5thFor making a dune many different factors are important.We need strong wind, plants and sand. South of Parentis enBorn we have perfect conditions for making a dune.On the seaside a dune is less steep and it becomes slowlybigger until it breaks sharply on the other side. You have toimagine it like that: The wind from the ocean’s side blowslittle grains of sand and forms a little hill. On the top ofthe dune the sand just falls down. So we have two differentsides, one less steep then the other. Sometimes you cansee that the “foot” of the dune (lower part of the dune) istaken away by big waves. Trees and other plants on thedune are there for stabilization of the dune and also toprotect the dune from the waves. Plants, which grow on thedune, hold the sand together. In contrast: dunes withoutplants are shifting dunes.All in all there are many factors, which you have to knowabout by speaking about dunes.4
  • 5. Landscape ReadingLeo, Drice, Julian and LisaThe first activity today was to draw the landscape around theduneCourant dhuchet. We were devided in three groups and everygroup had to draw another part. At first we had to say whathas which colour, for example the plants are green. Then wehad to allocate forms to different things on the landscape, forexample a circle means the lake. Besides we had to thinkabout what is influenced by humans and what is not.Afterwards we drew our pictures.Results:-The humans built a fence that the visitors can not walk onthe dune. That is important because they would destroy theplants and the dune would break.-The animals would die because of the humans. They destroytheir living area.-The nature protection area except of the few houses whichare privat property is not influenced by humans.-The plants are very important because if they were not therethe sand of the dune would fly away and there would not be adune anymore.We had some agreements for example everyone said the cars,the fence, the way is human work. The plants and the lake arenatural. And the rocks are a bit influenced because they weremoved by humans.5
  • 6. Michele Milde, Elodie Moser, Pierre Fleurentin and Sabrina Holldorb.The arthropods are small animals which are living in thetide mark and lay their eggs under pieces of wood be-cause they need water and salt which is in the wood andalso protection from the sun and predators. The “Puces de Mer” are very grey little shellfish which is two centimetres high. They are shellfish because they have two pairs of antenna.The spiders are smaller than “Puces de Mer” and theircolour is black. They live in the tide mark too. 6
  • 7. HEIL Mona/CAMMAS CorentinEMDE Mala/ DELACOUR Gautier Tide markWhen the water rises, it leaves a line of many things: we callit tide mark.There are two kinds of items, the natural ones, like wood,stones and shells, and artificial waste, like plastic andglass…Sometimes, people take the rubbish away. On one hand it isgood because the beach is cleaner and better for the vacationbut on the other hand, the wood and the other things stop thewater destroying the dunes.7
  • 8. Tuesday, April 5th 2011Parabolic dune Johanna Koch, Baptiste Audemard WIND 10 KmOCEAN N W E S The East 45 m side is stee- 22° 15° per than theWest side. Here we see a parabolic dune model. OCEAN8
  • 9. The Barkhanedune The Shape of the Dune A profile of the dune This Dune is a Barkhane dune. The side of the dune facing the ocean is less steep (about 10°) than the side fa- cing the landscape (about 30°) The height of the dune is about 20m. :The diffrences with a parabolic dune are, that the belly of the half-circle faces the ocean, and its also closer to it. So the parabolic must be older. Jean-Arnaud Balcou , Eva Klein9
  • 10. The Lagune ( Lena and Lena , Tuesday 4th april 2011) We were at a lagune and there we fou nd a lot of shells. -Bittium: They are very small and long and there are a lot of them together. -Gibbule: Snails live in shells which are curled. -Mysia: They have actually two parts and they are white and they are smooth and they are about 3cm in diameter. -Nasse: They are little and they look like a cone. They are white and they have stripes. -Ocenebra: They are little and curled. They are not smooth, but uneven.Everybody searched for shells on the Lagune and took pic-tures of them. We put the shells in little boxes, broughtthem back to school and studied them. Because at the La-gune the sea is very calm and still the shells are very smalland different to the shells at other beaches. 10
  • 11. Beach dune (Biscarosse Plage)Leo, Drice, Julian and Lisa 5th AprilThe last dune we visited today was the Beach dune in Bisca-rosse Plage.It was the only dune we visited which was built by humans.Also it was the flattest dune we saw; it was only 16 metershigh.The humans built it to have the control of it.Because if the enviroment would built a natural dune it wouldbe much more difficult to control it.People try to avoid movement of the dune by planting plantsand putting branches on the dune.The dune is a straight dune which is quite long but not veryhigh.On the ocean side it goes straight down because of the waveswhich "eat" up the dune. On the other side, the forest side, thedune is quite steep.11
  • 12. Paleoenvironmental element Lukas, Corentin, Maël, Derya Tuesday April 5thToday we were at the Biscarrosse plage and the dune,which is only a few meters away from the beach. If youwatch the sand of the beach you will recognize that it has-n’t just one colour. You will see that there is also blacksand. We wondered about the black colour of the sand andwe found out that there was a lagoon 4OOO years ago.That’s also the reason why there some shells and snails inthe sand we also found in Arcachon’s lagoon. In the lab wefound 9 different kinds of shells/snails.Here you can see 3 examples.12
  • 13. ONF: Fight of the dune shifting Mala Emde/ Gautier Delacour Johanna Koch/ Baptiste Audemard We know that the dunes are moving and will overflow our villages. That’s why the organisation « ONF » had build the dunes and other things for saving our homes. The history The sand comes from the ocean in the Ice Age with the help of wind and waves. A long time ago the ocean was 120 me- ters lower and 20 kilometers in the west. What causes the dune shifting ? The wind transports the sand into the landscape and if there is a storm the big waves destroy the dunes.13
  • 14. What are the human actions to prevent that shifting? The sand and the water are dangerous for the villages be- cause it can destroy them. In the end of the XVIIIth century, the inhabitants started to plant many trees for a forest, and they also planted gras on the dune to stop the dunes from shifting. The inhabitants put many branches on the dune to stop the movement of the sand. They also built fences. If the sand comes to the fences it will be stopped. The sand cove- red the fence and within one century the dunes were build. ThanksAt first we want to thank the headmaster of the french school Saint ExupérPhilippe Augustin and Stefan Langsdorf, the headmaster of the german schoolMusterschule, for letting us taking part in this program. We also want to saythank you to the ONF that tought us alot about dunes and the area around. Andnext we say thanks to the Comenius-agency. It’s great to have the oppertunityto do such a fun and interessting exchange. And last but not least the tea-chers!!! Thank you all (Misses Schwarzmeier, Mister Werner, Mister Lartique,Mister Viarouge and Mister Labat) for all the organisation you went throughand the patience you had to bring up.14 The german and french Comeniusstu-
  • 15. EUROPEAN ECOSYSTEMS BIODIVERSITY AND PROTECTIONSaint Exupéry high school of Parentis takes part in a European school exchange program with COMENIUS between Frankfurt MUSTERSCHULE and Tchèque GYMNAZIUM PRAHA 7. This project studies European ecosystems biodiver- sity and protection of the environment..Field works and lab works would be carry out along with firm visits. This project concern grade 9 students (14-15 ans). English will be the communication language15