• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

How does the distance from the ground affects the abundance of different species of moss on a rocky surface wall?

Extracts from this document...


How does the distance from the ground affects the abundance of different species of moss on a rocky surface wall? Problem/issue: Mosses are very small green plants that grow together forming dense carpets in clusters on fallen logs, at the base of trees or in damp, shady places. Their structure consists of a thick stem, densely covered with tiny leaves. Moss plants do not possess true roots. Instead, mosses derive their nutrients and moisture from the air. Moss affects the communities in which they live since they provide food and shelter to small insects and animals. Moss also protects soil and keeps slopes from erosion during rainstorms or severe weather. ...read more.


Hypothesis: The closer to the ground in a rocky surface wall, the more abundance of species of moss are developed. Variables: a) Independent variable: * The distance from the ground in a rocky surface wall b) Dependent variable: * The abundance of the different types of moss c) Fixed variables: * Land (the area will be the same rocky wall at different points) * Temperature * Water precipitations * Sunlight * Wind * Quadrats sizes * Time * Latitude * Length of the transect * Space size between quadrats Materials: * A rocky surface wall approximately 2 meters high and 50 cm wide * Measuring tape * A digital camera for photographic records * 5 meters or rope * 4 nails * A hammer * Anemometer for measuring wind speed Method: 1. ...read more.


Calculations of results: a) The measurements used for the percentage cover will be the following: Percentage cover (%) ACFOR Scale Score >50 Abundant 5 25-50 Common 4 12-25 Frequent 3 6-12 Occasional 2 <6, or single individual Rare 1 Absent 0 Table #1 Percentage cover scales b) After measuring the percentage cover of each quadrat, the data will be arranged on the following table. A table will be created per quadrat where N is the letter of the quadrat. Moss specie Percentage cover (%) ACFOR Scale Score Table #2 Quadrat N c) After obtaining the percentage cover or each quadrat, a T-test will be produced in order to determine if there's a big difference or not. Then, conclusions may be drawn from the collection of data. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our International Baccalaureate Biology section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related International Baccalaureate Biology essays

  1. Should Animals have the same rights as Humans? Both animals and humans exhibit behaviours ...

    After three repetitions, the square is still resulting in the production of saliva but Pavlov comments at the bottom that after 11 repetitions the square resulted in a complete lack of reaction. Time Stimulus applied during 30 secs. Amount of Saliva recorded by divisions of scale (5 div=0-1 c.c)

  2. Biology Extended Essay 2009

    It is considered a premium quality product and consequently brings a premium price in the consumer market at the same time.11 Nutrients in orange juices are heat stable for pasteurization (e.g sugar, vitamins, minerals, flavonoids), which means most of these elements will not be lost after the thermal processing.

  1. Activated sludge wastewater treatment system and method

    the growth of the microorganisms introduced in the activated sludge with the resultant reaction removing contaminants from the wastewater. In conventional activated sludge technology, a predetermined period of time related to the strength of the wastewater and treatment objectives is required for the mixture to react in the aeration tank in a batch flow process.

  2. Examine the correlation between soil moisture at different heights up the slope and the ...

    This is our method of controlling the independent variable and why we?re controlling it. Dependent variable: Length of the longest leaf of the Bracken Fern is our biotic factor and is therefore our dependent variable. This will be measured using a metre ruler from the start of the Bracken Fern

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work