Mangrove Addendum

8/17/2019 Mangrove Addendum

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2/13

• Mangroves are group of trees ad shrubs foundin coastal intertidal zones

• Replace salt marshes & tidal flats in tropical

regions• Located in areas where wave action is

primarily absent and sediments accumulate

•Mud is anoxic

• Mangrove plants have root extensions(pneumatophores)


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• Apply transect line method

• Identify the species present on the sampling

sites

• Characterize the soil observed on the

sampling sites


4/13

The study site is located at16.3961° N,

119.9336° E. The Santiago island is

found 96.7 km from Dagupan City, off

the coast of Bolinao

The island is adjacent to the Lingayen

Gulf and the South China Sea.

Santiago Island


5/13

Data analysisAssessment of mangrove

areaBoat ride to site

2

• 10 Transect line

randomly laid down 3

times

• Organisms that

touched the line were

recorded

• Soil analysis

• Diversity

Index

• Relative

Abundance

-marked at 10 cm interval

(electric tape)

-marked at 1 m interval

(gold yarn)


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0

1

2

3

4

5

6

7

8

Site 1 Site 2 Site 3

Group 2 Species Count

Species 1 Species 2 Species 3


Figure 1. Data gathered by group 2. Species 1) Mangroves Species 2, 3, & 4)

unidentified plants Species 5) Ipil-ipil Species 6) unidentified yellow butterfly


7/13

0

2

46

8

10

12

14

Transect 1 Transect 2 Transect 3

Group 8 Species Count

Mangrove Grass Oregano Porites Starfish

Figure 2. Data gathered by group 8. As with the previous graph, organisms were

counted and were recorded and was graphed to better visualize. Both graphs showthat mangroves are the most plentiful organism in the area.


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Species 1(Mangrove)

Species 5 (Ipil-ipil/Leucaena

leucocephala)


Starfish

Porites sp.


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Figure 3. Overall count for organisms found in the sampling area, totaling to 6 transect

line replicates

35

15

5 1 1 1 2 36

10

5

10

15

20

25

30

35

40

Total Species Occurences in the Area


10/13

ANOVA

Source of

VariationSS Df MS F P-value F crit

Between

Groups19.73333 5 3.946667

0.5719

810.721096

2.3860

7

Within

Groups372.6 54 6.9

Total 392.3333 59

Shannon's Index = - () 3.110

Simpson's index (D) = 2 0.312

Simpson's index of diversity = 1 - D 0.688

Table 1. Analysis of the data gathered. The species between the 6 samplings were

compared. A computed p-value of 0.721 is shown in the table.

Table 2. Diversity of dominance indices of the site.


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• Simpson’s Index of Diversity is an index of dominance

and diversityThe closer index of diversity value is to 1, the more

diverse the species in an specific area

• Shannon’s Index is also an index of diversity

The closer the index value is to 4, the more rich

and even the species are in an area.


12/13

• Simpson’s Index of Diversity was 0.688 and

Shannon index was 3.110

• The most dominant species was the mangrove

• A p-value of 0.721, computed using ANOVA,

signifies that at 95% confidence interval, themeans of the species in the 6 replicates werenot significantly different


13/13

• Anderson, G. (2004) Introduction to Mud Flats. Retrieved from

http://www.marinebio.net/marinescience/03ecology/mfintro.htm

• EcoLogic Development Fund. (2014). What Is a Mangrove? Retrieved fromhttp://www.ecologic.org/actions-issues/about-the-region/what-is-a-mangrove/

• National Oceanic and Atmospheric Administration. (2014). What is a "mangrove" forest? Retrieved from http://oceanservice.noaa.gov/facts/mangroves.html

• Ng, K. & Sivasothi, N. (2001). Guide to the Mangroves of Singapore. Retrievedfrom http://mangrove.nus.edu.sg/guidebooks/text/1010.htm

• Reef, R., Feller, I., & Lovelock, C. (2010). Nutrition of Mangroves. Tree

Physiology, 30, 1148-1160.

• Smith, T. & Smith, R. (2012). Elements of Ecology. New York City, New York:Pearson Education.

Documents

Mangrove Addendum