Kestabilan Habitat Lamun Ditinjau Dari Komposisi dan Kepadatan Jenis

Abstract

<em>Seagrasses habitats have both physical and ecological functions that support adjacent waters qualities and its dwelling organisms. There are varies of pressure on seagrass environmental, especially due to people activities that could decrease its function and habitat stabilities. The study aimed to determine about seagrass habitat stabilities from its species composition and/or densities. Line transect-plots and exploration methods were used in five locations of Manokwari coastal waters, that were, Andai, Rendani, Wosi, Briosi, and Tanjung Manggewa. There are five pioneer species (Cymodocea rotundata, Halodule pinifolia, H. uninervis, Syringodium isoetifolium, Halophila ovalis) and 3 climax species (Cymodocea serrulata, Enhalus acoroides, Thalassia hemprichii). The pioneer only found in Andai and Wosi, however both pioneer and climax encountered in three other locations. In Rendani and Tanjung Manggewa higher density of climax species (T. hemprichii) were 617.7 and 828.0 stands m-2, respectively, although in Briosi the higher pioneer (C. rotundata) of 570.7 stands m-2. These conditions showed that seagrass habitat in Rendani and Tanjung Manggewa are more stable compared to Briosi, as well as Andai and Wosi. It concluded that pioneer species found in newly formed habitat or disturbed, on the other hand, climax in more stable habitat.</em>

Seagrass Community Structure and Ecosystem Carbon Stocks Along the Shoreline of Semujur Island, Bangka Belitung Province, Indonesia

“…Its ability to coexist with other seagrass species contributes to its abundance at the two sites. Meanwhile, Mead-2 exhibited the highest species density of T. hemprichii, a species which is typically found in muddy sediments, sensitive to turbidity and thrives in fine sandy substrates enriched with coral remains (Vermaat , 1997;Terrados et al, 1998;Lefaan, 2012). The prevalence of T. hemprichii at Mead-2 can be ascribed to the specific environmental conditions present at this site.…”

Preliminary Study of Heavy Metals of Cymodocea rotundata in Doreri Bay Manokwari Regency

“…Salah satu ekosistem penting dalam keseimbangan lingkungan di wilayah pesisir adalah lamun (Pattipeilohy et al, 2020). Menurut (Lefaan, 2012) menyatakan bahwa ekosistem lamun mempunyai fungsi sebagai penyedia makanan, sebagai produktivitas primer dalam perairan, peredam datangnya gelombang, tempat pertumbuhan dan perkembangan biota serta perangkap sedimen. Selain fungsi tersebut lamun juga berfungsi sebagai perangkap bahan pencemar melalui akumulasi logam berat di lamun (Sembel et al, 2019).…”

Spatio-temporal of heavy metal Pb (Lead) in seawater, sediment, and different organs of Cymodocea rotundata in Doreri Gulf, Manokwari, West Papua, Indonesia

“…This ecosystem provides food, acts as primary productivity in the waters, dampens the arrival of waves, a place for growth and development of biota, and trapping sediments (Lefaan 2012). Besides, it functions as a trap for contaminants by accumulating heavy metals (Nontji 2005;Lefaan 2012;Sugiyanto et al 2016;Tupan and Azrianingsih 2016;Bidayani et al2017;Potouroglou et al 2017;. Cymodocea rotundata in Doreri Gulf is classified as a pioneer seagrass with the ability to adapt to disturbed conditions.…”