Thursday 13th September 2012 Section 3

Nisitha and Yuan table:

Quadrat A B C D E
1 80% 20%

A= Grass
B= Clover

Comment by nisithadissanayake September 13, 2012 @ 6:48 pm

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Hannah and Spencer

Quadrat A B C D E
1 80% 84% 52% 100% –

A = Grass
B = Dandelion
C = Ladies Bedstraw
D = Clover

Comment by hannahgooch September 13, 2012 @ 7:39 pm

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Measuring biodiversity

Species richness – This is the number of different species found in a certain area; the more species found, the higher the richness e.g 2 different species found means a species richness of 2. However, species richness does not tell us which species are common or rare.

Species evenness – This is the number of each type of species, recorded as either a percentage or as a raw number. There are two possible outcomes; either lots of species with 1 or 2 dominant kinds, or lots of species of equal number. To differentiate organisms, use a species key to decided whether or not they are the part of the same species.

If it is impractical to count individually how many of each species there are, use the ACFOR scale (abundant, common, frequent, occasional, rare) as a rough indicator.

Areas with many different species tend to be more stable and are better at coping with environmental change. If an area only contains one type of species, then a change of conditions such as temperature could result in the entire area dying.

Results for Phil and Candice:

Quadrat 1: Species A 85%; Species B 7%; Species C 13%
Quadrat 2: Species A 80%; Species B 20%;

A = Grass
B = Clover
C = Dandelion

Comment by phillipmarriage September 13, 2012 @ 10:26 pm

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This is actually really good detail and all
Can add to my notes now

Comment by halima95 September 16, 2012 @ 8:59 am

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Measuring biodiversity

Species richness – This is the number of different species found in a certain area; the more species found, the higher the richness e.g 2 different species found means a species richness of 2. However, species richness does not tell us which species are common or rare.

Species evenness – This is the number of each type of species, recorded as either a percentage or as a raw number. There are two possible outcomes; either lots of species with 1 or 2 dominant kinds, or lots of species of equal number. To differentiate organisms, use a species key to decided whether or not they are the part of the same species.

If it is impractical to count individually how many of each species there are, use the ACFOR scale (abundant, common, frequent, occasional, rare) as a rough indicator.

Areas with many different species tend to be more stable and are better at coping with environmental change. If an area only contains one type of species, then a change of conditions such as temperature could result in the entire area dying.

Results for Phil and Candice:

Quadrat 1: Species A 85%; Species B 7%; Species C 13%
Quadrat 2: Species A 80%; Species B 20%;

A = Grass
B = Clover
C = Dandelion

Comment by phillipmarriage September 13, 2012 @ 10:43 pm

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Quadrat 1: Species A – 75% Species B – 20% Species C – 5%

A= Grass
B= Clover
C= Dandelion

Jake and gautam

Comment by jakepalmer1 September 14, 2012 @ 3:28 pm

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http://e360.yale.edu/feature/finding_new_species_the_golden_age_of_discovery/2129/

Comment by yuansun September 14, 2012 @ 6:09 pm

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Ben and Jaimie

A= grass (61%)
B= clover (11%)
C=Dandilion (4%)
D=lady’s bedstraw (22%)
E= Other plant (unidentified) (2%)

Comment by bensubhani September 14, 2012 @ 8:19 pm

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Halima and Mehleen table
Quadrat 1
Species A (grass) -100%
Species B (flower) – 88%
Species C (Dandelion leaves/flower) – 12%
Species D (3-leaf clovers) – 88%

Comment by halima95 September 16, 2012 @ 8:45 am

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Ignore the above table and Mehleen’s one. They’re wrong. This is the actual rresult. The key is still the same though.
A – 62%
B – 28%
C – 8%
D – 2%

Comment by halima95 September 17, 2012 @ 8:18 am

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