Analysisof Litter Fall Rate and Phytoplankton, Zooplankton, Benthos Abundance in Silvofishery with Rhizophoramucronataand Avicennia marina Stands in KPH Purwakarta

• Main Author: EKI NUGRAHA (NIM : 11513042), MUHAMAD
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/23162
• Institution: Institut Teknologi Bandung

Silvofisheryis a system that integrates mangrove vegetation in fishery cultivation. The source of nutrients for these silvofishery pools comes from the litter fall of surrounding vegetation. The nutrients created from litter decomposition in the soil is vital for the growth of mangrove vegetation and as detritus for the silvofishery ecosystem to support food chains consisting of various aquatic organisms such as phytoplankton, zooplankton, benthos and fish. This study aims to quantify litter fall rates of leaves, abundance of phytoplankton, zooplankton, and benthos, and determine the fertility of the fish ponds based on plankton abundance and water quality suitability for milkfish. This study was conducted in KPH Purwakarta. A litter trap with a size of 1 x 1 m2 was used for litter collection. A plankton net and eckman grab was used to collect plankton and benthos. Plankton and benthos samples were identified in the PPSDAL Unpad Laboratory. Leaf litter, phytoplankton abundance, zooplankton abundance and benthos samples were collected every two weeks for two months from 5 June – 31 July 2017. Based on the data acquired, the average rate of litter fall of in pools with Rhizoporamucronatawas 50 ± 12.44 gr/m2/ 2 weeks. Meanwhile in pools with Avicennia marina stands, the average rate of litter fall was 64.37 ± 20.46 gr/m 2 / 2 weeks. An independent sample T test computed that the sig. (2-tailed) value was 0.011 and shows that there is a significant difference between litter fall rates in Rhizoporamucronatatand Avicennia marina stands. Relative abundance of phytoplankton, zooplankton, and benthos in ponds Rhizoporamucronatastands are, Oscillatoriasp 83.10%, Oithonasp 41.30%, Naupliisp 43.14%, Melanoidesriquerti 100%.Relative abundance of phytoplankton, zooplankton, and benthos in pools with Avicennia marina stands are, Oscillatoriasp 46%, Oithonasp3.60%, Naupliisp 82.56%, Melanoidesriquerti 80%. Plankton abundance in ponds with Rhizophoramucronata and Avicennia marina stands were categorized as low each with 35128.75 ind/m 3 and 28437.5 ind/m, thereby categorized as having an oligotrophic fertility. Based on the results of this research, the water quality suitability for bandeng fish cultivation in ponds with Rhizophoramucronata and Avicennia marinastand, shows that the two types of ponds were categorized as almost suitable (S3) thereby acquiring special treatment.