Highlight Research Seeds can grow into seagrass seedlings for an optimal period of five weeks Seed sowing can be optimized by supplementing nutrients with fertilizers The seedling transplant method, which utilizes seed seedlings, is not significantly different in daily growth from the anchor transplant method, which utilizes donors/seeds transport The biomass content of seagrass leaves can be used to determine the growth rate of the leaves Abstract Globally, the area of seagrass beds important to the ecosystems in coastal environment is decreasing due to environmental pressures, both natural and artificial. Transplantation is one way to restore the condition of damaged seagrass beds, the anchor transplant method uses the transfer of donor seagrass to the transplant area, while the seed transplant method uses seed sowed from seagrass. This study aimed to investigate the survival and growth rates of seagrass transplants and the biomass and chlorophyll content of transplanted Enhalus acoroides in the waters of Panjang Island Jepara utilizing anchor and seedling methods. The research was conducted in the waters around Panjang Island, Jepara, between September and December 2021. The results indicated that transplantation of seagrass E. acoroides using the anchor method resulted in the highest average growth rate of 0.25 cm/day and a survival rate of 96.67%, while transplantation using the seedling method resulted in a growth rate of 0.18 cm/day and a survival rate of 83.33%. The results showed that the anchor method scored better than the seedling transplantation method in terms of growth rate and survival rate. However, seedling is a feasible method to meet the availability of seeds that will later be transplanted, considering that the anchor method still has shortcomings in terms of the availability of seeds and the use of pegs which are still not environmentally friendly. so that the seedling method can be recommended for the restoration process of seagrass ecosystems by taking into account the season, weather and other important indices.
Konsep blue carbon adalah salah satu upaya untuk mengurangi emisi gas karbon pemicu pemanasan global dengan cara memanfaatkan vegetasi pesisir sebagai penyerap karbon. Ekosistem lamun merupakan salah satu ekosistem pesisir yang dapat menyerap karbon dalam jumlah besar. Penelitian ini bertujuan untuk mengetahui kondisi lamun dan kandungan karbon pada lamun di Perairan Pulau Besar Utara, Maumere, Sikka. Pengamatan lamun menggunakan transek kuadrat 50x50cm menurut panduan LIPI. Sampling lamun dilakukan acak menggunakan seagrass core berdiameter 15 cm di setiap lokasi. Perhitungan kandungan karbon menggunakan metode Loss On Ignition (LOI) yang kemudian dikonversikan dengan nilai biomassa pada setiap titiknya. Jenis lamun yang ditemukan sebanyak 4 spesies yaitu Enhalus acoroides, Thalassia hemprichii,, Cymodocea rotundata,dan Syringodium isoetifolium. Lokasi pengamatan memiliki tutupan lamun sangat padat. Nilai biomassa dibawah dan diatas substrat pada lokasi pengamatan didapat nilai 424,60 gbk/m2 dan 79,67 gbk/m2. Total kandungan karbon pada lokasi pengamatan adalah 41,95 gC/m2. Kandungan karbon terbesar disimpan pada jaringan lamun (akar dan rhizoma) dengan spesies E. acoroides sebagai penyumbang nilai biomassa dan kandungan karbon tertinggi. Lokasi perairan Pulau Besar Utara, Maumere memiliki kondisi perairan yang baik dengan kerapatan lamun yang tinggi, secara umum kandungan karbon yang terdapat pada perairan tersebut memiliki kandungan yang tinggi. Kondisi lamun yang baik akan memiliki simpanan karbon yang baik dan hal ini merupakan salah satu upaya dalam mitigasi perubahan iklim sekaligus menjaga kelestarian laut. The concept of blue carbon is one of the efforts to reduce carbon gas emissions that trigger global warming by utilizing coastal vegetation as a carbon sink. Seagrass ecosystems are one of the coastal ecosystems that can absorb large amounts of carbon. This study aims to find seagrass conditions and carbon content in seagrasses on the waters of Besar Utara Island, Maumere, Sikka. Seagrass observations used a 50x50cm quadrant transect according to the LIPI guideline, 2017. Seagrass sampling was using seagrass cores with 15cm diameter in each location. Calculation of carbon content using the Loss On Ignition (LOI) method which is then converted to biomass values at each point. Seagrass species found in location sampling were 4 species, namely Enhalus acoroides, Thalassia hemprichii, Cymodocea rotundata, and Syringodium isoetifolium. The Location has very dense seagrass cover. Biomass values below and above the substrate at location sampling (424.60 gbk / m2 and 79.67 gbk / m2). The total carbon content in location sampling is 41.95 gC / m2. The largest carbon content is stored in seagrass tissues (roots and rhizomes) with E. acoroides as a contributor to the highest biomass and carbon content. The location of Besar North island, Maumere has good water conditions with high seagrass density, in general the carbon storage at the location of Besar North island is high condition. Seagrass with good condition will have good carbon storage and this is one of the efforts in mitigating climate change at once preserving the sea.
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