Chamidy, Ardian Nurrasyid
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Analisis Multivariat Untuk Melihat Hubungan Jenis Sedimen Terhadap Jenis Lamun Chamidy, Ardian Nurrasyid; Suryono, Chrisna Adhi; Riniatsih, Ita
977-2407769
Publisher : Departemen Ilmu Kelautan, Fakultas PerikanJurusan Ilmu Kelautan, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (390.561 KB) | DOI: 10.14710/jmr.v9i1.26686

Abstract

 ABSTRAK: Perairan Teluk Awur dan Pulau Panjang memiliki kondisi perairan yang berbeda dan merupakan perairan yang masih baik untuk pertumbuhan lamun. Ekosistem padang lamun tumbuh pada sedimen dan hidup terendam di dalam air laut. Komposisi jenis sedimen diduga dapat menyebabkan perbedaan komposisi jenis lamun yang didasari oleh pemikiran bahwa perbedaan komposisi ukuran butir sedimen akan menyebabkan perbedaan nutrisi bagi pertumbuhan lamun. Penelitian ini bertujuan untuk mengkaji hubungan jenis sedimen terhadap jenis lamun di perairan Teluk Awur dan Pulau Panjang Jepara dengan menggunakan analisis multivariat. Penelitian ini dilakukan dalam beberapa tahap yang meliputi tahap persiapan, tahap penentuan stasiun dengan metode sampling purposive method, tahap pengambilan data lapangan, tahap analisis tekstur sedimen yang dilakukan di laboratorium teknik sipil fakultas teknik Universitas Diponegoro, dan tahap analisis data menggunakan analasis multivariat yaitu Principal Component Analysis (PCA). Hasil analisis PCA  menunjukkan  bahwa  Cymodocea  serrulata  dan  Cymodocea  rotundata  berkorelasi positif dengan sand, kecepatan arus, dan pH. Thalassia hemprichii dan Enhalus acoroides memiliki korelasi positif dengan silt, clay, suhu, salinitas dan bahan organik. Gravel memiliki korelasi postif dengan nitrat dan fosfat.ABSTRACT: The waters of Teluk Awur and Panjang Island have different water conditions and are still good waters for seagrass growth. Seagrass ecosystems grow in sediments and live submerged in seawater. The composition of the substrate types is thought to cause differences in the composition of seagrass types based on the thought that differences in the composition of sediment grain size will cause differences in nutrition for seagrass growth. This study aims to examine the relationship of sediment types to seagrass species in Teluk Awur  and  Pulau  Panjang,  Jepara  by  using  multivariate  analysis.  This  research  was conducted  in  several  stages  including  the  preparation  stage,  the  stage  of  determining stations with the purposive sampling method, the stage of field data collection, the stage of sediment texture analysis carried out in the civil engineering laboratory of the engineering faculty Diponegoro University, and the stage of data analysis using multivariate analysis with Principal Component Analysis (PCA). PCA analysis results show that Cymodocea serrulata and Cymodocea rotundata are positively correlated with sand, current speed, and pH. Thalassia hemprichii and Enhalus acoroides have a positive correlation with silt, clay, temperature, salinity and organic matter. Gravel has a positive correlation with nitrate and phosphate.
Evaluating the seagrass ecological condition and habitat extent in Karimunjawa National Park, Jepara Indonesia Kusnadi, Agus; Alifatri, La Ode; Chamidy, Ardian Nurrasyid; Rasyidin, Asep; Sobirin, Sobirin
Jurnal Kelautan Tropis Vol 27, No 1 (2024): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v27i1.20637

Abstract

In the coastal ecosystem, seagrass meadows play a vital role in delivering ecosystem services such as provision, control, and support. However, this ecosystem is one of the most threatened in the coastal environment, and it has been degraded as a result of anthropogenic disturbance and rapid environmental changes. Furthermore, the extent of the seagrass meadows is unknown, and the health of the meadows is unmonitored and unrecorded. There is little information on the current state of the seagrass extent and health conditions in Karimunjawa National Park. We evaluate the abundance, states, and health conditions of the seagrass meadows based on the ecological quality index in Karimunjawa National Park, Jepara, Indonesia. This district has a vast extent of seagrass meadows but has been affected by the expansion of the industrial/tourism area within the region. This study aimed to assess the seagrass current condition based on the ecological quality index. The result showed that the total seagrass extent area in Karimunjawa National Park was 969,15 ha where seven species were found in this area, including Enhalus acoroides, Thalassia hemprichii, Cymodocea rotundata, Cymodocea serrulate, Halodule pinifolia, Halophila ovalis and Halodule uninervis. Seagrass meadow coverages were moderate and categorized as less healthy. The seagrass ecological quality index value was 0.66 which indicated that the seagrass condition in Karimunjawa National Park was moderate. Ecological factors that affect the seagrass state are epiphyte cover and macroalgal cover. 
Effect of Liquid Fertilizer on Seedling Enhalus acoroides Seeds (Linnaeus f.) Royle 1839 (Fam: Hydrocharitaceae) Chamidy, Ardian Nurrasyid; Widianingsih, Widianingsih; Munasik, Munasik; Riniatsih, Ita; Susanto, AB
Jurnal Kelautan Tropis Vol 27, No 1 (2024): JURNAL KELAUTAN TROPIS
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jkt.v27i1.21066

Abstract

The decrease in seagrass coverage and ecosystem harm to seagrass meadows is an annual occurrence resulting from both natural and human activities.  Seagrass seeding has been deemed an effective restoration method, but its application is restricted by suboptimal environmental conditions and constraints associated with directly planting seagrass seeds in their natural habitat. The influence of environmental parameters, particularly nutrients, significantly affect on seagrass seed survival. NPK liquid fertilizer is commonly used in aquatic plants and is readily accessible in the market. It serves as a crucial source of macronutrients for seagrass. This study investigates the impact of different concentrations of NPK liquid fertilizer on the survival rate, growth, and chlorophyll, a content of E. acoroides seedlings. The study took place between March and May 2023 at the marine biology laboratory of the marine science study program at Diponegoro University's Faculty of Fisheries and Marine Science. According to the Manova statistical test, the NPK liquid fertilizer had an impact on the growth rate, biomass, and chlorophyll-a. The seagrass seeding container of E. acoroides treated with a liquid fertilizer concentration of 4.5 ml/100l exhibited the highest average growth rate of 0.29 cm/day and a chlorophyll-a value of 12.395 mg/g, with a survival rate of 100%. Causal connections between statements ensure logical construction. In contrast, seedlings without liquid fertilizer treatment showed the lowest growth rate of 0.19 cm/day and chlorophyll-a values of 5.169 mg/g, with a survival rate of 85.19%. Technical term abbreviations such as 'cm/day' and 'mg/g' are explained when first used to ensure clarity. Based on these findings, using liquid fertilizer with a concentration of 4.5 ml/l exhibits potential for restoring seagrass ecosystems.