| Abstrak/Abstract |
Natural tourism activities that are being developed by the Gunungkidul Government can threaten the sustainability of coastal habitats particularly seaweeds population. Before it was damaged or even extinct, research on seaweeds on the southern coast of Gunungkidul was important. This research was conducted on two coasts that have the potential to become conservation areas, which were Porok and Greweng Coasts. Selection of sample sites followed a strategy designed to cover a diverse range the accessible sites on both coasts. Samples were collected by hand-picked during low tide, preserved as a wet herbarium and identified in the Plant Systematics Laboratory of the Faculty of Biology UGM. Data are presented as a checklist comprise of the taxonomic identity and key character including in-situ image of each species. Comparison of population structure and composition was carried out based on the Sorensen Index. Our results showed that there were 21 seaweed species of Porok consisting of 5 Chlorophyceae, 5 Phaeophyceae, 11 Rhodophyceae and 11 seaweed species of Greweng consisting of 3 Chlorophyceae, 2 Phaeophyceae, and 6 Rhodophyceae. The results indicated that the structure and composition of seaweeds population in the study area which were compared had a low similarity value of 44 %. Data displays a low level of similarity, so it is assumed that the structure and composition of seaweed on the southern coast of Gunungkidul be different. This means that each coast in Gunungkidul has different habitat status, so that a comprehensive data of seaweed diversity in all regions is needed. |
