diversity analysis of intertidal species in different tide pool elevations
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Transcript diversity analysis of intertidal species in different tide pool elevations
DIVERSITY ANALYSIS OF
INTERTIDAL SPECIES IN
DIFFERENT TIDE POOL
ELEVATIONS
Femi Adegbidi, Brittany Cain , Ally Pennell,
Melanie Hogan, Louise-Marie Roux
The Rocky Intertidal
Unique environment with
fluctuating physical
factors
Physical transition zone
Diverse zones with
various species
Fluctuating habitats
Tide Pools
Fluctuating environments
Tides
Physical factors
Temperature
Salinity
Oxygen concentration
Tide Pool Composition
High Elevations
High salinity
Temperature changes
Low Elevations
More water
Oxygen
Poor at dealing with
fluctuations
Objective
Effect of elevation on species diversity and
organismal composition in tide pools
Hypotheses
Medium-Low height tide pools greater diversity and
richness
Organisms found will be similar to those defined in the
intertidal zonation theory
Tide pools at similar elevations will be more similar to each
other
Bay of Fundy
St. Andrew’s, NB
World’s highest tides
Ideal site for intertidal
research
Sampling Sites
2 sites
Indian Point- uniform, sandy substrate,
Green’s Point- steep, rocky
4 tide pools per site
Sampling Methods
30 cm2 quadrat
Surveyor’s transit
Organisms collected and identified
Data Analysis
Dichotomous key for species identification
Diversity indexes
Sorensen’s similarity index
Simpson’s diversity index
Common Species: Greens Point
I Lowest Tide Pool
IV
25
Highest Tide Pool
100
Littorina littorea
90
15
Cystoclonium purpureum
80
Mytilus edulis
70
Laminaria saccharina
60
Littorina littorea
Littorina obtusata
10
Acmaea testudinalis
Buccinum undataum
5
Fucus spiralis
Total Count
Total Count
20
Littorina obtusata
Mya arenaria
50
Anomia aculeata
40
Mytilus edulis
30
20
Placopecten
magellanicus
10
Gammarus oceanicus
0
0
Organisms
Organisms
Common Species: Indians Point
II
120
100
Total Count
80
Littorina littorea
40
Mytilus edulis
Littorina obtusata
60
Mya arenaria
Semibalanus balanus
20
Acmaea testudinalis
0
Organisms
Species Richness
10
9
8
Species Richness
7
6
5
Indian Point
Green's Point
4
3
2
1
0
0
0.5
1
1.5
Height (m)
2
2.5
3
Species Diversity
0.6
0.5
Simpson's Index
0.4
0.3
Green's Point
Indian Point
0.2
0.1
0
0
0.5
1
1.5
Height (m)
2
2.5
3
Tide Pool Elevation Similarity
Conclusions
Organisms that can cope with frequent disturbance
are found in tide pools at higher elevations
Organisms that require more water and oxygen in
tide pools at lower elevations
Sampling methods may have missed microscopic
organisms Changing diversity
THANK YOU!