Phytoplankton

COMMUNITY STRUCTURE OF PHYTOPLANKTON IN SAMPALOC LAKE,

SAN PABLO CITY, LAGUNA

HAIZEL ANNE T. DE ASIS AND JAHZEEL ZUBIAGA

DEPARTMENT OF BIOLOGYPOLYTECHNIC UNIVERSITY OF THE PHILIPPINES

Phytoplankton

g

roup of minute autotrophic

organism

f

loats in the water surface of

rivers and lake

p

assively mobile; generally at the

“whim” of the currents

(Relon, 1988)

G

rowth of Phytoplankton is affected by Eutrophication

Allow algae bloom on the surface Low dissolved oxygen in bottom waters death of oxygen-dependent organism Fish and invertebrate mortality

(Round, 1981)

Phytoplankton

S

ampaloc Lake:

E

utrophic Area

• Commercialization• human effluents• illegal fish pens• crowded fish cages

SAMPALOC LAKE

R

educing Fish cages characterization of the phytoplankton community

be done in Sampaloc Lake

determine the trophic status of the lake’s water by identifying indicator species present in the study site.

STATEMENT OF THE PROBLEM

W

e determined the structural diversity of the

phytoplankton in Sampaloc Lake Laguna

correlate the diversity of phytoplankton with existing

environmental factors

identified and classified the phytoplankton present

compare the phytoplankton diversity in each designated stations

OBJECTIVES OF THE STUDY

Station

Physico – chemical

Parameters

Biological Parameters

Horizontal Hauling-Littoral Zone

Vertical Hauling-Limnetic Zone

pH TurbT° DO

Correlation Analysis

Preservation

Concentration

Identification

Counting

Diversity Indices(Dominance, Abundance,

Shannon, Simpson , Evenness and Richness)

Methodology

Temperature and pH

Dissolved Oxygen

Transparency

Vertical Hauling

Horizontal Hauling

Station

Physico – chemical

Parameters

Biological Parameters

Horizontal Hauling-Littoral Zone

Vertical Hauling-Limnetic Zone

pH TurbT° DO

Correlation Analysis

Preservation

Concentration

Identification

Counting

Diversity Indices(Dominance, Abundance,

Shannon, Simpson , Evenness and Richness)

Methodology

Plankton Net

Haemocytometer

Station

Physico – chemical

Parameters

Biological Parameters

Horizontal Hauling-Littoral Zone

Vertical Hauling-Limnetic Zone

pH TurbT° DO

Correlation Analysis

Preservation

Concentration

Identification

Counting

Diversity Indices(Dominance, Abundance,

Shannon, Simpson, Evenness and Richness)

Methodology

RESULTS

AND

DISCUSSIONS

values are reported as mean ± Standard Error (s/√n)*values with the same letters are not significantly different at = 0.05

 Table 1. Physico-chemical Parameters of Sampaloc Lake (November 2010).

Parameters Station Average

1 2 3 4 5

Temperature (0C) 28.23±0.04 a 27.82±0.03a 27.61±0.02a 25.86±1.11a 27.14±0.02a 27.33±0.24

pH 8.35±0.05abc 8.32±0.05abc 8.36±0.03ac 8.43±0.05b 8.27±0.09c 8.35±0.05

Transparency(in.) 28.50±1.32ab 38.58±5.30a 34.72±7.50a 30.02±7.59a 20.08±0.19b 30.38±0.57

DO(mg/L) 8.75±0.05a 9.06±0.02ab 9.32±0.02ab 10.22±.08b 9.29±0.05a 9.33±0.04

DIVISION CHLOROPHYTA

Spirogyra sp.

Stigeoclonium sp.Staurastrum sp. Green Algae 1

Pediastrum sp. Protoccoccus sp.

DIVISION BACILLARIOPHYTA

Amphora sp.Berkeleya sp.Cyclotella sp.Coscinodiscus sp.Thallossiosira sp.

Pinnularia sp.Odontella sp.Nitzchia sp.Navicula sp.Melosira sp.Mastoglia sp.

DIVISION CYANOPHYTA

COMPOSITION OF PHYTOPLANKTON COMMUNITY

T

he algal composition of Sampaloc Lake was represented by

three major groups namely:• Bacillariophyta (diatom)• Chlorophyta (green-algae) and• Cyanophyta (blue-green algae)

which comprises twenty (20) taxa. The genera were

distributed into 6 genera of green algae, 11 genera of diatoms

and 3 genera of blue-green algae.

Taxa Abundance Mean RA(%)Rf (%)1 2 3 4 5

Chlorophyta1. Pediastrum sp. 76 0 0 0 116 131.20 0.180126253 402. Protoccocus sp. 0 0 0 139 0 139.00 0.190834979 203. Spirogyra sp. 182 8 0 0 0 44.40 0.06095736 404. Stigeoclonium sp.5. Staurastrum sp.6. Green algae 1

008

36900

0580

000

000

369.0058.001.60

0.5066050870.0796289840.002196662

202020

Bacillariophyta7. Amphora sp. 0 0 0 0 152 152.00 0.208682854 208. Berkeleya sp. 0 0 0 0 3 3.00 0.004118741 209. Cosinodiscus sp. 3 0 1768 0 0 1768.60 2.428134842 4010. Cyclotella sp. 245 240 104 328 53 774.00 1.06263506 10011. Mastoglia sp. 0 0 0 0 18 18.00 0.024712443 2012. Melosira sp. 2326 1374 859 902 12104 15704.20 21.56050842 10013. Navicula sp. 48 0 33 5 0 47.60 0.065350683 6014. Pinnularia sp. 3 0 0 0 0 0.60 0.000823748 2015. Odontela sp. 0 0 0 0 1152 1152.00 1.581596369 2016. Nitzcha sp. 35 10 13 0 73 103.00 0.141410092 8017. Thalossiosira sp. 0 96 0 0 0 96.00 0.131799697 20Cyanophyta18. Lyngbya sp. 0 0 0 0 1323 1323.00 1.81636458 2019. Oscillatoria sp. 533 78 0 0 0 184.60 0.253439835 4020. Merismopedia sp. 0 116 46510 0 4242 50868.00 69.83736467 60

72937.8

 Table 2. Community comparison of phytoplankton in different station.

Melosira sp.

Cyclotella sp.

Figure.3 Distribution of the major phytoplankton taxa in Sampaloc Lake (November 2010).

(S) (d) (H’) (1-D) (E) (D)  

1 10 0.048 a 1.113 a 0.516 a 0.305 a 1.104 a 

2 8 0.398 a 1.302 a 0.601 a 0.409 a 1.033 a 

3 7 0.890 a 0.274 a 0.110 a 0.188 a 0.555 a 

4 4 0.498 a 0.871 a 0.502 a 0.597 a 0.415 a 

5 9 0.453 a 1.092 a 0.547 a 0.298 a 0.912 a 

Average 20 0.534 0.973 0.446 0.132 1.680

Station Diversity Indices

*values are reported as mean ± Standard Error (s/√n)*values with the same letters are not significantly different at = 0.05

Table 3. Community Characteristics of Phytoplankton in Sampaloc Lake (November, 2011)

Characterization of Phytoplankton Community

SUMMARY, CONCLUSION AND RECOMMENDATION

Based on the results the following conclusions were figure out:

•the phytoplankton community in Sampaloc Lake was distributed to 3 major groups namely Division Chlorophyta, Bacillariophyta and Cyanophyta ;

•a total of 20 taxa were present in Sampaloc Lake and dominated by Melosira sp. and

•Sampaloc Lake is exhibiting eutrophic condition based on the presence of bioindicator groups.

Upon completion of the study, the following are recommended:

•the trophic state of Sampaloc Lake be verified using other chemical analyses ;

•continuous monitoring of the lake be done to improve the trophic condition of the lake and

•use SEM (scanning electron microscope) in identification of the phytoplankton at species level.