To what extent do the dunes at camber show the characteristics typical of this depositional landform? To start my geography GCSE controlled assessment I have gone to Camber sands beach to record a variety of characteristics from the dunes in order to answer my hypothesis, shown above. There were a few key concepts and processes we used in our investigation they were Coastal deposition, Sand Dunes, Psammosere and Plant Succession. These four concepts above all fit in with my investigation for one reason or another.
Coastal Deposition–The laying down of sediment, in a low energy environment. It occurs when large supplies of light material are moved around in rivers, the sea, cliffs and much more. Many landforms are created from this, such as spit, bar, beach, longshore drift and irregular coastlines.
Sand Dunes – Sand dunes are formed from coastal deposition, sand is blown and stopped by an obstacle, which may be as small a plant. The sand then builds up in time and eventually will build up to be a noticeable landform. Sand dunes build up behind each other to form many dunes which then are named, for example the Yellow dunes and embryo dunes.
Psammosere - A plant succession originating in a sandy area, as on sand dunes including the changes in height, vegetation and ph. The perfect Psammosere consists of an Embryo Dune, the smallest dune at pH 8 and consisting of a little vegetation. Next is the Fore Dune slightly bigger consisting of more vegetation. Then there is the Yellow Dune and the Grey Dune, which are less sheltered and have lots of grasses on about 80% coverage. There is then a drop in height to the Dune Slack which often has water lying in a puddle as it goes below sea level. Because of the puddle of water it attracts water loving plants. Finally there is the Mature Dune consisting of trees; often birch and oak. The Mature Dune is the final dune of the Psammosere.
Plant Succession - Evolution of series of plants over a given area. The series of plants occurs in a fairly predictable order while the habitat progressively evolves. Primary succession is the first plant in a habitat. Secondary succession is the replacement of the primary plant, following a disturbance to it. In autogenic succession the plants themselves are the genesis of change; succession is directed from within the ecosystem. In allogeneic succession the changes are driven by forces outside the ecosystem.
Interpretation and QWC
My Hypothesis is, To What Extent Do the Dunes at Camber Show the Characteristics Typical of This Depositional Landform? For me to answer or prove my hypothesis I need to look at my results for most of the data we collected. This is because I need to relate my data to my knowledge of a typical sand dune. For example atypical psammosere would have the embryo dune and yellow dune etc., so I need to see if my results translate to Camber Sands having these typical features.
This graph shows a rough presentation of the Camber psammosere, it has similar characteristics to the ‘perfect psammosere’ such as a small embryo dune at the start and a build up to the big yellow dune. After the yellow dune there is a small dip at 150 metres, however this isn’t a substantial dip that you would expect as the dune slack should drop down to below sea level. The dune slack is characteristically below sea level as water is often found lying there. My transect of the camber dunes is a close representation to a perfect dune, however it could be a lot closer as I took results every 10 metres, this means I sometimes found myself walking over a small dune and my results would show it at all. Also some recordings wouldn’t be taken at the top of bottoms of peaks and troughs of the dunes. The two faults in my data collection mean that a completely true representation of the camber psammosere could not be collected. Due to the spacing between each measurement being 10 metres there could be a...
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