Zulham Apandy Harahap
Program Studi Manajemen Sumberdaya Perairan, Fakultas Pertanian, Universitas Sumatera Utara

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ANALISIS KANDUNGAN NITRAT DAN FOSFAT SERTA KETERKAITANNYA DENGAN KERAPATAN MANGROVE DI PANTAI LABU KABUPATEN DELI SERDANG Sabrilianti Yahra; Zulham Apandy Harahap; Eri Yusni; Rusdi Leidonald
JURNAL ENGGANO Special Issue SEMINAR NASIONAL VIRTUAL
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31186/jenggano.5.3.350-366

Abstract

Pantai Labu merupakan daerah yang terletak di Kabupaten Deli Serdang dan dimanfaatkan oleh masyarakat untuk penangkapan ikan menggunakan kapal, pemukiman serta aktivitas wisata. Adanya aktivitas tersebut diduga menyebabkan penurunan kualitas lingkungan mangrove yang berada di Pantai Labu. Nitrat dan Fosfat merupakan nutrien utama yang menentukan kestabilan pertumbuhan vegetasi mangrove. Akibat penurunan kualitas lingkungan, maka akan mempengaruhi distribusi nitrat dan fosfat yang dapat mempengaruhi pertumbuhan mangrove tersebut. Penelitian ini bertujuan untuk mengetahui kandungan nitrat dan fosfat di substrat mangrove serta keterkaitannya dengan kerapatan mangrove. Penelitian ini dilakukan pada bulan September-Oktober 2019 dengan menggunakan metode purposive sampling pada 5 titik stasiun. Hasil penelitian didapatkan nilai total kerapatan mangrove untuk tingkat pohon yaitu 2,89 Ind/m2,untuk tingkat pancang 1,75 Ind/m2 dan untuk tingkat semai 0,1 Ind/m2. Kandungan nitrat dalam sedimen berkisar antara 0,7-1,11 mg/kg dan kandungan fosfat dalam sedimen berkisar antara 2,5-2,8 mg/kg. Kandungan nitrat di subtrat yang didapatkan dalam penelitian ini termasuk ke dalam kategori rendah. Kandungan fosfat di subtrat yang didapatkan dalam penelitian ini termasuk ke dalam kategori rendah. Keterkaitan nitrat dengan kerapatan mangrove yang didapatkan sebesar 98% yang berarti nitrat memiliki pengaruh yang sangat besar dengan kerapatan mangrove, sedangkan keterkaitan fosfat dengan kerapatan mangrove yang didapatkan adalah sebesar 20% yang berarti fosfat memiliki pengaruh yang kecil (sedikit) dengan kerapatan mangrove.Pantai Labu is an area located in Deli Serdang Regency which is used by the people for fishing using ships, settlements and tourist activities. The existence of these activities is thought to cause a decrease in the quality of the mangrove environment on Pantai Labu. Nitrate and Phosphate are the main nutrients that determine the stability of mangrove vegetation growth. As a result of environmental degradation, it will affect the distribution of nitrates and phosphates which can affect the growth of mangroves. This study aims to figure out the nitrate and phosphate content in the mangrove substrate and its relation to the density of the mangrove. This research was conducted in September-October 2019 using a purposive sampling method at 5 station points. The results obtained total value of mangrove density for tree level is 2.89 Ind/m2, for the sapling level 1.75 Ind/m2 and for seedling level 0.1 Ind/m2. Nitrate content in sediments ranged from 0.7-1.11 mg/kg and phosphate content in sediments ranged from 2.5-2.8 mg/kg. The nitrate and phosphate content in the substrate obtained in this study was the low category. Result of statistical analysis of the relationship between nitrate and mangrove density was 98%, which means that nitrate had a very big effect on mangrove density, while the relationship between phosphate and mangrove density was 20%, which meant that phosphate had a small effect (a little) with mangrove density.
Marine Ecotourism Potential in Unggeh Island Tapanuli Tengah Regency, North Sumatra, Indonesia Zulham Apandy Harahap; Ipanna Enggar Susetya
Jurnal Ilmiah Perikanan dan Kelautan Vol. 12 No. 2 (2020): JURNAL ILMIAH PERIKANAN DAN KELAUTAN
Publisher : Faculty of Fisheries and Marine Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jipk.v12i2.17940

Abstract

Highlight Calculated and assested the percentage of live coral coverIdentified reef fishes and calculated fish abundanceMeasured physical and chemical oceanography parameter Analyzed carrying capacity and suitability of Unggeh Island for tourism utilization especially marine diving and snorkeling.AbstractUnggeh Island located in the administration of the Village Sitardas Badiri District, Central Tapanuli Regency into a marine tourism area. The development of marine ecotourism Unggeh Island is an alternative to the economic improvement of so- ciety. This study aims to assess the potential of coral reef ecosystem in the form of percentage of life form coral, coral species and species and abundance of reef fish found in Unggeh Island waters of Central Tapanuli Regency and to analyze the suitability of coral reef ecosystem in Unggeh Island for tourism utilization es- pecially marine diving and snorkeling. Coral reef community data collection was done by using SCUBA divers equipment, in identifying The coral community used underwater photo transect (UPT) method, while coral fish diversity was observed by underwater visual census (UVC) method. Physical and chemical oceanography parameter data such as temperature, salinity, pH, current, transparency and DO are performed at each observation station. The survey results of coral reef observation at four stations showed different results. Percentage of live coral cover of station 1 to 4 were 25.40 %, 12.33%, 28.53%, and 25.53 respectively. Therefore, reef fishes found 36 species that consist of ten families and 423 individual fishes. The results showed that Unggeh Island was suitable (S2) for diving and snorkeling activities, with the carrying capacity was 3.054 persons/day.
Distribution and ecological status of mangroves in the Nias Islands-North Sumatra Province: Distribution and ecological status of mangroves in the Nias Islands Ahmad Muhtadi; Zulham Apandy Harahap; Ahyar Pulungan; Zufriwandi Siregar; Elisabet Rosevenny Simaremare; Ani Rahmawati; Wilman Nazara; Khairunnisa
AQUACOASTMARINE: Journal of Aquatic and Fisheries Sciences Vol. 2 No. 2 (2023): AQUACOSTMARINE: Journal of Aquatic and Fisheries Sciences
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jafs.v2i2.12757

Abstract

The Nias Islands are a group of islands located on the west coast of Sumatra. Nias Island is the main and largest island on the West Coast of Sumatra. Information on the distribution and potential status of mangroves in the Nias Islands has been reported, but it is limited to a narrow area and not yet comprehensive throughout the Nias Islands. This study aims to determine the distribution and ecological status of mangroves in the Nias Islands. The research location was divided into two observation areas, namely 15 points on Nias Island and 23 points on the southern part of Nias. The research was carried out in June 2019 and June 2021. Mangrove sampling was carried out using the "spot check" method which refers to Bengen (2004). The results showed that the mangroves found in the Nias Islands consisted of 22 primary mangrove species and 9 secondary mangrove species. Rhizophora apiculata, Rhizophora mucronata, and Xylocarpus granatum are the most abundant mangrove species and are commonly found in the Nias Islands. The thickness of mangroves in the Nias Islands ranges from 15 – 880 m. The density of mangroves found reached 350-4,360 ind/ha. Mangrove cover reaches 0.08-31.62 m2/ha. The results of the analysis of the significant value of mangrove species show that Rhizophora mucronata and Rhizophora apiculata have a large influence and role in the mangrove vegetation community on Nias Island. Mangroves in the Nias Islands are categorized as damaged–good. The good category was found in South Nias, Belukar Bay, and Bengkuang Bay, while the damaged category was found in Lahewa Bay and Dalam Bay
Distribution and ecological status of mangroves in the Nias Islands-North Sumatra Province: Distribution and ecological status of mangroves in the Nias Islands Ahmad Muhtadi; Zulham Apandy Harahap; Ahyar Pulungan; Zufriwandi Siregar; Elisabet Rosevenny Simaremare; Ani Rahmawati; Wilman Nazara; Khairunnisa
AQUACOASTMARINE: Journal of Aquatic and Fisheries Sciences Vol. 2 No. 2 (2023): AQUACOSTMARINE: Journal of Aquatic and Fisheries Sciences
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jafs.v2i2.12757

Abstract

The Nias Islands are a group of islands located on the west coast of Sumatra. Nias Island is the main and largest island on the West Coast of Sumatra. Information on the distribution and potential status of mangroves in the Nias Islands has been reported, but it is limited to a narrow area and not yet comprehensive throughout the Nias Islands. This study aims to determine the distribution and ecological status of mangroves in the Nias Islands. The research location was divided into two observation areas, namely 15 points on Nias Island and 23 points on the southern part of Nias. The research was carried out in June 2019 and June 2021. Mangrove sampling was carried out using the "spot check" method which refers to Bengen (2004). The results showed that the mangroves found in the Nias Islands consisted of 22 primary mangrove species and 9 secondary mangrove species. Rhizophora apiculata, Rhizophora mucronata, and Xylocarpus granatum are the most abundant mangrove species and are commonly found in the Nias Islands. The thickness of mangroves in the Nias Islands ranges from 15 – 880 m. The density of mangroves found reached 350-4,360 ind/ha. Mangrove cover reaches 0.08-31.62 m2/ha. The results of the analysis of the significant value of mangrove species show that Rhizophora mucronata and Rhizophora apiculata have a large influence and role in the mangrove vegetation community on Nias Island. Mangroves in the Nias Islands are categorized as damaged–good. The good category was found in South Nias, Belukar Bay, and Bengkuang Bay, while the damaged category was found in Lahewa Bay and Dalam Bay