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Perran sands Investigation - Hypothesis - The Percentage of marram grass decrease as the species diversity increases.

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Perran sands Investigation Katie vellenoweth Hypothesis The Percentage of marram grass decrease as the species diversity increases. Method To investigate the species diversity and the percentage of marram grass, we used a belt transect to the collect the data. A belt transect was laid from the beach/dune interface to the dune meadow. Quadrates were laid along on the 000ht side with the left hand bottom corner at the start of each interval along the belt transect. The belt transect was measured every two metres until similarly findings were recorded of each species, of which then we increased the intervals of every 5 metres and finally every 10 metres. The area within each quadrate was examined for different species of which then was recorded. At the same time the percentage of marram grass was recorded from the area within the quadrates. This data was put into a raw data table. ...read more.


When examining the species within the quadrats we took care not to damage any of the species, such as we didn't pull any of the plants up to get a closer look, so we could identify them. We didn't leave any litter around which could interfere with the growth of the plants or damage them in anyway. Results From my results that I obtained from the sand dunes the scatter diagram illustrated that there may have been a slight positive correlation. From the Spearman rank test it showed that the results had no significant correlation as the value was lower than the level which was needed to support the that there was a relationship. Conclusion/Evaluation On the kite diagram of the marram grass against the distance from the beach/dune interface it shows that there is steady increase in the amount of marram grass, as the distance increases. ...read more.


There were some limitations to this investigation as there we only used one belt transect to collect our data from, therefore it would have been better if we did a number of belt transects. This would enable us to obtain a larger amount of data. As with some of the results that we got there were very few species this was because there was a path running through our belt transect. The seasonal impact is also a limitation as we only took recordings in the summer months, where as in the other seasons there may have been a different of species and also different percentages of marram grass. As in the winter season the environment conditions tend to be not as compactable to some species and this may lead to a decrease in the amount of species that could be found. Overall I feel that there are some mixed results and to obtain a clearer picture and therefore more data is needed to show a better findings. Here some helpful web sites I found http://www.chias.org/www/diorama/w1.html http://www.google.com/search?hl=en&lr=&ie=UTF-8&q=marram+grass&spell=1 http://www.chias.org/www/diorama/w2.html http://www.fgillings.freeserve.co.uk/marram.html ...read more.

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