Analisis Perubahan Struktur Komuntas Lamun di Perairan Pantai Tanjung Kerasak Desa Pasir Putih Kabupaten Bangka Selatan

Analysis of Changes in Seagrass Community Structure in Tanjung Hardak Beach, Pasir Putih Village, South Bangka Regency

Abstract

Seagrass (seagrass) is a flowering plant that has fully adapted to life immersed in the sea. Activities around waters that are not environmentally friendly are feared to have a negative impact on seagrass survival. This study aims to analyze the changes in seagrass community structure in the South Coastal Coast of Tanjung Kerasak South Bangka. This research was conducted in September 2019 in Tanjung Hardak Coastal Waters using a survey method that refers to a previous study in 2011 with a squared transect measuring 0.5 x 0.5 m.. The species of seagrass found consisted of 10 species namely Enhalus acoroides, Cymodocea serullata, Cymodocea rotundata, Thalassia hemprichii, Halodule uninervis, Halophila minor, Halophila spinulosa, Sryingodium isoetifolium, Halodule pinifolia and Halophila ovalis, whereas in 2011 there were only eight species. The highest closure at station I is Halophila minor, station II Cymodocea serrulata and station III Cymodocea serrulata. The highest closing in 2011 at all stations was Halodule pinifolia. The highest density is Cymodocea serrulata and Halophila ovalis, while in 2011 the highest density was Halodule pinifolia and Halodule uninervis. The highest frequency is Cymodocea serrulata and Halodule uninervis and in 2011 Cymodocea rotundata and Halodule uninervis. The highest INP of Cymodocea serrulata and in 2011 was Halodule pinifolia, moderate diversity, high uniformity and moderate dominance and in 2011 high diversity, low uniformity and moderate dominance and cluster distribution patterns.