Compotition and Community Structure of Periphyton at Rhizophora mucronata Lamk dan Avicennia marina (Forsk) Vierh. Roots in Mangrove Vegetation of Tapak Estuary, Semarang

Aini Chairunnisa Amalia. K2D 001 234. Compotition and Community Structure of Periphyton at Rhizophora mucronata Lamk dan Avicennia marina (Forsk) Vierh. Roots in Mangrove Vegetation of Tapak Estuary, Semarang. (Widianingsih and Rudhi Pribadi)

Periphyton has a significant role in food web of mangrove community. The objective of this research was to analyze community structure of periphyton that live attached on mangrove roots of Tapak Estuary ecosystem.

This has been done in February until April 2006. Material used in the research was living sample of periphyton that live attached on mangrove roots of Tapak Estuary ecosystem. Explorative descriptive method was applied as research method while sample survey method was used in collecting data and purposive sample method was used to determine sampling location. Supporting parameter data include sediment grain size and organic substance content, turbidity, current velocity, temperature, salinity, dissolved oxygen, pH, nitrate, phosphate, and silicate from each sampling station.

Study on Phytoplankton Community Structure in Segara Anakan Waters, Cilacap, for the Period of September to December 2004

Plankton is minute organism living drifted away in a water column. Phytoplankton is floral-plankton which able to synthesize their food using sun energy through photosynthesis process. In most time the presences of phytoplanktons influence the productivity of the waters, but in some extreme condition they can be dangerous for their environment too. The aim of this study is to identify community structure of phytoplankton in Segara Anakan lagoon and its related environmental factors, and hopefully the findings will be useful as back up data for the monitoring programmed of the lagoon.