DIVERSITY OF PLANKTON IN WATER VELVET BLOOMED WATERS

(CASE STUDY: SITU PERIKANAN, BOGOR, WEST JAVA, INDONESIA)

1. INTRODUCTION

Inna Puspa Ayu*, Aliati Iswantari, Dwi Yuni Wulandari, Reza Zulmi, Desy Mulyawati, Goran Suryanti Afifah Sulaiman, Fitri Afina Radityani

In beginning 2015 year, water velvet bloomed was arise in Situ Perikanan. Water velvet or known as Salvinia sp. or Kiambang in local name was covered almost 100% of Situ Perikanan surface water. This condition could lead to biotic factors ecosystem changes. The first impact was showed in plankton, especially phytoplankton as primary producer.

Plankton composition additionally showed diversity in waters. Discovery alien and inva-sive species in Situ Perikanan is possible and this information could useful for further re-search.

2. RESULT Parameter St 1 St 2 St 3

Temperature (oC) 29.4 28.7 29.2

pH 5.06 5.02 5.11

Dissolved Oxygen (mg/l)

3.2 3.1 3.2

Orthophosphate (mg/l) <0,005 <0,00

5 <0,005

Ammonia (mg/l) 0.247 0.318 0.215

Nitrate (mg/l) 1.210 1.708 1.567

Nitrite (mg/l) 0.032 0.028 0.027

3. CONCLUSION

Coelastrum sp. Closterium sp. Rotifera Tabelaria sp. Cosmarium sp. Melosira sp.

The aim of this research was to determine phytoplankton and zooplankton diversity in Situ Perikanan in water velvet bloom condition

Water Quality in Situ Perikanan, Bogor

Situ Perikanan was a man-made lake and built in 1995 has 15.423 m2 large and 1.34 m depth (Nugroho 2003). It has function as water catchment area, education field, water resource for aquaculture re-search ponds, and receive wastewater both point or non-point sources. The last function of situ Perikanan, possibly of eutrophica-tion could occur in aquatic ecosystem of situ.

Water Velvet Blooming in Situ Perikanan, Bogor

a) Phytoplankton composition in Situ Perikanan, b) Ecological indicies of phyotoplankton in Situ Perikanan,

c) Cluster of stations based on phytoplankton abundance.

(a) (b) (c)

(f) (g) (e)

e) Zooplankton composition in Situ Perikanan, f) Ecological indicies of zooplankton in Situ Perikanan,

g) Cluster of stations based on zooplankton abundance

4. Acknowledgement We thank to Aldiano Rahmadya who prepared map layout and Tyas Chandra who assist sampling observation.

There were found 22-31 taxa of phy-toplankton belong to group Cyano-phyceae, Bacillariophyceae, Chloro-phyceae, Dinophyceae, and 8-14 taxa of zooplankton belong to group Protozoa, Rotifera, Crustaceae and some larval from Gastropoda, in wa-ter velvet bloomed in Situ Perikanan, Bogor, West Java, Indonesia.

Living Aquatic Resources Management, Faculty of Fisheries and Marine Science, Bogor Agricultural University

Jl. Agatis Kampus, Dramaga, Bogor 16680

*innapuspa@gmail.com