{"title":"Catatan Biodiversitas Gastropoda pada Ekosistem Mangrove Desa Kramat Kecamatan Mananggu Kabupaten Boalemo, Provinsi Gorontalo","authors":"Faizal Kasim, Miftahul Khair Kadim, Mansyur Abukasim","doi":"10.14203/oldi.2022.v7i2.404","DOIUrl":"https://doi.org/10.14203/oldi.2022.v7i2.404","url":null,"abstract":"","PeriodicalId":202832,"journal":{"name":"OLDI (Oseanologi dan Limnologi di Indonesia)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128580725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-11-15DOI: 10.14203/oldi.2022.v7i2.378
Andi Chadijah, Sulistiono Sulistiono, G. S. Haryani, Ridwan Affandi, Aly Mashar
Characteristic of Habitat Opudi Fish ( Telmatherina prognatha Kottelat, 1991) in Lake Matano, South Sulawesi . Lake Matano is a very deep water and is classified as an oligotropic lake type. The condition of Lake Matano is threatened with degradation due to land conversion which can indirectly affect the habitat of endemic fish in this case is opudi fish ( Telmatherina prognatha Kottelat, 1991). This study aims to determine the characteristics of Lake Matano includes water quality data, consisting of physical parameters (temperature and brightness, turbidity, total dissolved solids/total dissolved solids/TDS) and chemical parameters (dissolved oxygen/DO and pH. In addition, data on water level from PT. Vale Indonesia werw used, and data on monthly average rainfall (mm) around the lake obtained from BMKG. Fluctuation of
{"title":"Karakteristik Habitat Ikan Opudi (Telmatherina Prognatha Kottelat, 1991) Di Danau Matano, Propinsi Sulawesi Selatan","authors":"Andi Chadijah, Sulistiono Sulistiono, G. S. Haryani, Ridwan Affandi, Aly Mashar","doi":"10.14203/oldi.2022.v7i2.378","DOIUrl":"https://doi.org/10.14203/oldi.2022.v7i2.378","url":null,"abstract":"Characteristic of Habitat Opudi Fish ( Telmatherina prognatha Kottelat, 1991) in Lake Matano, South Sulawesi . Lake Matano is a very deep water and is classified as an oligotropic lake type. The condition of Lake Matano is threatened with degradation due to land conversion which can indirectly affect the habitat of endemic fish in this case is opudi fish ( Telmatherina prognatha Kottelat, 1991). This study aims to determine the characteristics of Lake Matano includes water quality data, consisting of physical parameters (temperature and brightness, turbidity, total dissolved solids/total dissolved solids/TDS) and chemical parameters (dissolved oxygen/DO and pH. In addition, data on water level from PT. Vale Indonesia werw used, and data on monthly average rainfall (mm) around the lake obtained from BMKG. Fluctuation of","PeriodicalId":202832,"journal":{"name":"OLDI (Oseanologi dan Limnologi di Indonesia)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130710816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-11-15DOI: 10.14203/oldi.2022.v7i2.381
Putri Putri, Dimas Prasetyo, Gendhys Lintang Ayu, Revani Hariyanta, Lily Surayya Eka Putri, F. Wijayanti, Yayan Mardiansyah Assuyuti
{"title":"Hubungan Kesehatan Terumbu Karang dengan Kelimpahan ikan Karang dan Makrozoobentos di Perairan Desa Les, Bali","authors":"Putri Putri, Dimas Prasetyo, Gendhys Lintang Ayu, Revani Hariyanta, Lily Surayya Eka Putri, F. Wijayanti, Yayan Mardiansyah Assuyuti","doi":"10.14203/oldi.2022.v7i2.381","DOIUrl":"https://doi.org/10.14203/oldi.2022.v7i2.381","url":null,"abstract":"","PeriodicalId":202832,"journal":{"name":"OLDI (Oseanologi dan Limnologi di Indonesia)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117166271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-27DOI: 10.14203/oldi.2021.v6i3.379
D. Kurnianto, L. Indriana, Suparmo Suparmo, Nurhalis Tarmin, A. Wahab, Balkam F. Badi, R. N. Pesilette, Jasmadi Jasmadi
The Preference of The Sandfish Holothuria scabra on Macroalgae-Based Feed. The sandfish, Holothuria scabra, is one ofthe marine species that has the potential to be developed as a source of high-value functional food. However, the growth of sandfish is still constrained by the availability of suitable feed. This study aimed to determine the level of preference of sea cucumbers for artificial feed made from macroalgae. This study used six main ingredients: control (sea-sand), FF-1 (commercial shrimp feed), FF-2 (Padina sp.), FF-3 (Ulva sp.), FF-4 (Sargassum sp.), FF-5 (combination). A completely randomized design with three replications was implemented. Nutritional values of feed and the sandfish body, feed consumption, specific growth rate (SGR), survival, and water quality were investigated. The results revealed that all treatments had a 100 percent survival rate, even though the SGR for all treatmentswere negative. Artificial feed made from Padina sp. (FF-2) had the highest average feed consumption of 0.51 gram/day. This value was significantly greater than the other treatments (p<0.05). The SGR reached a positive value in the last week of the maintenance phase. The nutritional quality of the sandfish body generally decreased compared to the initial rearing condition. On the other hand, water quality was optimal for sandfish growth throughout the experiment.It can be concluded that the feed derived from Padina sp. is preferable for Holothuria scabra and has the potential to be further developed.
沙鱼对大型藻类饲料的偏好。沙鱼(Holothuria scabra)是一种有潜力开发成为高价值功能性食物来源的海洋物种。然而，沙鱼的生长仍然受到合适饲料的限制。本研究旨在确定海参对大型藻类人工饲料的偏好程度。本研究采用6种主要配料:对照(海沙)、FF-1(商品对虾饲料)、FF-2(帕迪纳)、FF-3(乌尔瓦)、FF-4(马尾藻)、FF-5(组合)。采用完全随机设计，3个重复。研究了饲料和沙鱼体的营养价值、饲料消耗量、特定生长率(SGR)、存活率和水质。结果显示，尽管所有治疗的SGR都是阴性的，但所有治疗的存活率都是100%。以巴帝娜(FF-2)为原料的人工饲料平均采食量最高，为0.51 g /d。这一数值显著高于其他处理(p<0.05)。SGR在维护阶段的最后一周达到正值。与初始饲养条件相比，沙鱼体的营养品质普遍下降。另一方面，在整个实验过程中，水质对沙鱼的生长是最理想的。综上所述，Padina sp.的饲料是一种较好的黄斑海棠饲料，具有进一步开发的潜力。
{"title":"Preferensi Teripang Pasir Holothuria scabra Terhadap Pakan Berbahan Dasar Makroalga","authors":"D. Kurnianto, L. Indriana, Suparmo Suparmo, Nurhalis Tarmin, A. Wahab, Balkam F. Badi, R. N. Pesilette, Jasmadi Jasmadi","doi":"10.14203/oldi.2021.v6i3.379","DOIUrl":"https://doi.org/10.14203/oldi.2021.v6i3.379","url":null,"abstract":"The Preference of The Sandfish Holothuria scabra on Macroalgae-Based Feed. The sandfish, Holothuria scabra, is one ofthe marine species that has the potential to be developed as a source of high-value functional food. However, the growth of sandfish is still constrained by the availability of suitable feed. This study aimed to determine the level of preference of sea cucumbers for artificial feed made from macroalgae. This study used six main ingredients: control (sea-sand), FF-1 (commercial shrimp feed), FF-2 (Padina sp.), FF-3 (Ulva sp.), FF-4 (Sargassum sp.), FF-5 (combination). A completely randomized design with three replications was implemented. Nutritional values of feed and the sandfish body, feed consumption, specific growth rate (SGR), survival, and water quality were investigated. The results revealed that all treatments had a 100 percent survival rate, even though the SGR for all treatmentswere negative. Artificial feed made from Padina sp. (FF-2) had the highest average feed consumption of 0.51 gram/day. This value was significantly greater than the other treatments (p<0.05). The SGR reached a positive value in the last week of the maintenance phase. The nutritional quality of the sandfish body generally decreased compared to the initial rearing condition. On the other hand, water quality was optimal for sandfish growth throughout the experiment.It can be concluded that the feed derived from Padina sp. is preferable for Holothuria scabra and has the potential to be further developed.","PeriodicalId":202832,"journal":{"name":"OLDI (Oseanologi dan Limnologi di Indonesia)","volume":"226 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131703169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-27DOI: 10.14203/oldi.2021.v6i3.369
Anna Rejeki Simbolon, Triyoni Purbonegoro
Bioaccumulation of Mercury (Hg) in Seagrass Enhalus acoroides and Mangrove Rhizophora apiculata in Pari Island, Seribu Islands. Heavy metal pollution, especially Hg metal in Jakarta Bay, is feared to have a negative impact on the quality of the waters around the Jakarta Bay waters, one of which is Pari Island in the Thousand Islands. Seagrass and mangroves plants distributed surrounding Pari Island can be used as indicators of heavy metal pollution. The value of bioaccumulation and translocation of Hg metal factors will provide an overview of the ability of plants to accumulate heavy metals in their surroundings. This study aims to determine the bioaccumulation and translocation of the heavy metal Hg factor in Enhalus acoroides seagrass and Rhizophora apiculata mangroves on Pari Island, Seribu Islands. Seagrass and mangrove samples were taken at five sampling points through purposive sampling. The bioaccumulation value was calculated using the ratio of the metal concentrations in each part of the plant body and sediment. Meanwhile, the translocation factor value was calculated by the ratio of Hg concentration in each part of the plant body (roots/rhizomes, stems, and leaves). The results of this study indicate that the bioaccumulation value in seagrass is infinite (bioaccumulation factor, BAF=∞) and in mangroves is 1.57 (BAF>1). The highest translocation factor value in seagrass leaves is 3.86 (translocation factor, TF) >1) and in mangrove leaves is 2.84 (TF>1). This study shows that seagrass and mangrove plants are classified as good bio accumulator and hyperaccumulator plants and accumulate heavy metals, especially Hg in the upper part of their bodies, namely leaves
{"title":"Bioakumulasi Merkuri (Hg) pada Lamun Enhalus acoroides dan Mangrove Rhizophora apiculata di Pulau Pari, Kepulauan Seribu","authors":"Anna Rejeki Simbolon, Triyoni Purbonegoro","doi":"10.14203/oldi.2021.v6i3.369","DOIUrl":"https://doi.org/10.14203/oldi.2021.v6i3.369","url":null,"abstract":"Bioaccumulation of Mercury (Hg) in Seagrass Enhalus acoroides and Mangrove Rhizophora apiculata in Pari Island, Seribu Islands. Heavy metal pollution, especially Hg metal in Jakarta Bay, is feared to have a negative impact on the quality of the waters around the Jakarta Bay waters, one of which is Pari Island in the Thousand Islands. Seagrass and mangroves plants distributed surrounding Pari Island can be used as indicators of heavy metal pollution. The value of bioaccumulation and translocation of Hg metal factors will provide an overview of the ability of plants to accumulate heavy metals in their surroundings. This study aims to determine the bioaccumulation and translocation of the heavy metal Hg factor in Enhalus acoroides seagrass and Rhizophora apiculata mangroves on Pari Island, Seribu Islands. Seagrass and mangrove samples were taken at five sampling points through purposive sampling. The bioaccumulation value was calculated using the ratio of the metal concentrations in each part of the plant body and sediment. Meanwhile, the translocation factor value was calculated by the ratio of Hg concentration in each part of the plant body (roots/rhizomes, stems, and leaves). The results of this study indicate that the bioaccumulation value in seagrass is infinite (bioaccumulation factor, BAF=∞) and in mangroves is 1.57 (BAF>1). The highest translocation factor value in seagrass leaves is 3.86 (translocation factor, TF) >1) and in mangrove leaves is 2.84 (TF>1). This study shows that seagrass and mangrove plants are classified as good bio accumulator and hyperaccumulator plants and accumulate heavy metals, especially Hg in the upper part of their bodies, namely leaves","PeriodicalId":202832,"journal":{"name":"OLDI (Oseanologi dan Limnologi di Indonesia)","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123562927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-27DOI: 10.14203/oldi.2021.v6i2.376
M. M. Islami, F. Nendissa, D. J. Tala
The present study reports and discusses population structure and morphometric relationships of muricid Reishia bitubercularis in two populations from Ambon Island, Maluku. Field sampling was conducted at two locations with typical hard substrate i.e. Ambon Bay and Central Maluku, where each location comprises three different stations. Morphometric relationships were analyzed for shell dimensions i.e., shell length (SL), shell width (SW), shell height (SH) and total weight (TW). A total of 496 individuals of R. bitubercularis were collected in both locations. SL ranged from 7.07 to 42.38 mm in Ambon Bay, and 12.45 to 42.69 mm in Central Maluku. The highest number of individuals in Ambon Bay and Central Maluku was in size 26-28 mm and 30-32 mm, respectively. The mean SW/SL ratio ranged from 0.67 mm to 0.73 mm. Sex ratio was significantly different from 1:1, with females outnumbered males in both locations. Morphometric relationships indicated SL grows faster than SW in both locations and faster than SH and TW in Central Maluku. While the growth rate between SL vs SH; and TW vs SL are relatively similar in Ambon Bay. Overall, both Ambon Bay and Central Maluku have a similar variation of abiotic factors which also play an important role in shell morphometrics and relative growth of muricids, especially related to the exposed area in the rocky intertidal zone where sampling was conducted.
{"title":"Population structure and relative growth of rock snails Reishia bitubercularis (Gastropoda: Muricidae) from Ambon Island, Eastern Indonesia","authors":"M. M. Islami, F. Nendissa, D. J. Tala","doi":"10.14203/oldi.2021.v6i2.376","DOIUrl":"https://doi.org/10.14203/oldi.2021.v6i2.376","url":null,"abstract":"The present study reports and discusses population structure and morphometric relationships of muricid Reishia bitubercularis in two populations from Ambon Island, Maluku. Field sampling was conducted at two locations with typical hard substrate i.e. Ambon Bay and Central Maluku, where each location comprises three different stations. Morphometric relationships were analyzed for shell dimensions i.e., shell length (SL), shell width (SW), shell height (SH) and total weight (TW). A total of 496 individuals of R. bitubercularis were collected in both locations. SL ranged from 7.07 to 42.38 mm in Ambon Bay, and 12.45 to 42.69 mm in Central Maluku. The highest number of individuals in Ambon Bay and Central Maluku was in size 26-28 mm and 30-32 mm, respectively. The mean SW/SL ratio ranged from 0.67 mm to 0.73 mm. Sex ratio was significantly different from 1:1, with females outnumbered males in both locations. Morphometric relationships indicated SL grows faster than SW in both locations and faster than SH and TW in Central Maluku. While the growth rate between SL vs SH; and TW vs SL are relatively similar in Ambon Bay. Overall, both Ambon Bay and Central Maluku have a similar variation of abiotic factors which also play an important role in shell morphometrics and relative growth of muricids, especially related to the exposed area in the rocky intertidal zone where sampling was conducted.","PeriodicalId":202832,"journal":{"name":"OLDI (Oseanologi dan Limnologi di Indonesia)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125127925","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-27DOI: 10.14203/oldi.2021.v6i3.384
M. R. Iskandar, Prima Wira K. Wardhani, T. Suga
The Sulawesi Sea is a semi-enclosed basin located in the Indonesian Seas and considered as the one of location in the west route of Indonesian Throughflow (ITF). There is less attention on the mixed layer depth investigation in the Sulawesi Sea. Concerning that the mixed layer plays an important role in influencing the ocean in air-sea interaction and affects biological activity, the estimation of mixed layer depth (MLD) in the Sulawesi Sea is important. Seasonal variation of the mixed layer in the Sulawesi Sea between 115°-125°E and 0°-8°N is estimated by using World Ocean Atlas 2013. Forcing elements on the mixed layer in terms of surface-forced turbulent mixing from mechanical forcing of wind stress and buoyancy forcing (from heat flux as well as freshwater flux) in the Sulawesi Sea is provided by using a reanalysis dataset. The MLD is estimated directly on grid profiles with interpolated levels based on chosen density fixed criterion of 0.03 kg.m-3 and temperature criterion of 0.5°C difference from the surface. The results show that mixed layer depth in the Sulawesi Sea varies both spatially and temporally. Generally, the deepest MLD was occurred during the southwest monsoon (JJA), and the lowest MLD was occurred during the first transition (MAM) and second transition monsoon (SON). Strengthening and weakening MLD are influenced by mechanical forcing from wind stress and buoyancy flux. In the Sulawesi Sea, the mixed layer deepening coincides with the occurrence of a maximum in wind stress, and low buoyancy flux at the surface. This condition is the opposite when mixed layer shallowing occurs.
{"title":"Seasonal Variability of The Mixed Layer Depth in The Sulawesi Sea","authors":"M. R. Iskandar, Prima Wira K. Wardhani, T. Suga","doi":"10.14203/oldi.2021.v6i3.384","DOIUrl":"https://doi.org/10.14203/oldi.2021.v6i3.384","url":null,"abstract":"The Sulawesi Sea is a semi-enclosed basin located in the Indonesian Seas and considered as the one of location in the west route of Indonesian Throughflow (ITF). There is less attention on the mixed layer depth investigation in the Sulawesi Sea. Concerning that the mixed layer plays an important role in influencing the ocean in air-sea interaction and affects biological activity, the estimation of mixed layer depth (MLD) in the Sulawesi Sea is important. Seasonal variation of the mixed layer in the Sulawesi Sea between 115°-125°E and 0°-8°N is estimated by using World Ocean Atlas 2013. Forcing elements on the mixed layer in terms of surface-forced turbulent mixing from mechanical forcing of wind stress and buoyancy forcing (from heat flux as well as freshwater flux) in the Sulawesi Sea is provided by using a reanalysis dataset. The MLD is estimated directly on grid profiles with interpolated levels based on chosen density fixed criterion of 0.03 kg.m-3 and temperature criterion of 0.5°C difference from the surface. The results show that mixed layer depth in the Sulawesi Sea varies both spatially and temporally. Generally, the deepest MLD was occurred during the southwest monsoon (JJA), and the lowest MLD was occurred during the first transition (MAM) and second transition monsoon (SON). Strengthening and weakening MLD are influenced by mechanical forcing from wind stress and buoyancy flux. In the Sulawesi Sea, the mixed layer deepening coincides with the occurrence of a maximum in wind stress, and low buoyancy flux at the surface. This condition is the opposite when mixed layer shallowing occurs.","PeriodicalId":202832,"journal":{"name":"OLDI (Oseanologi dan Limnologi di Indonesia)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132870259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-12-27DOI: 10.14203/oldi.2021.v6i3.382
Mochamad Ramdhan Firdaus, Arief Rachman, Oksto Ridho Sianturi, Diah Anggraini Wulandari, Hanny Meirinawati, Mariana D. B. Intan, Edy Endrotjahyo
The Abundance of the Harmful Benthic Dinoflagellate in the Seagrass and Macroalgae Habitats on Pari Island, Thousand Islands, Indonesia. Benthic dinoflagellates are an important part of benthic ecosystems and part of their ecological functions. However, ciguatoxin (CTX) producer dinoflagellates, which could cause Ciguatera Fish Poisoning (CFP) disease, is a known threat to marine biota and the island’s coastal communities, such as in Pari Island. Thus, this research aimed is to study the population of five harmful and toxin producer benthic dinoflagellate genera, namely Amphidinium, Coolia, Gambierdiscus, Ostreopsis, and Prorocentrum, in macroalgae and seagrass habitats of Pari Island. Benthic dinoflagellate samples were collected in Juni 2019 using artificial substrates in the form of a 10×15 cm nylon screen. Environmental variables, such as nutrient concentration (nitrogen and phosphorus) and water temperature were also measured. The results showed that the average benthic dinoflagellate density in seagrass habitats was four times higher compared to the macroalgae habitats. Gambierdiscus were found as the most abundant benthic dinoflagellate in seagrass habitats, while Prorocentrum were more abundant in macroalgae habitats. Principal Component Analysis (PCA) showed that the N:P ratio was the most important regulating parameter for most benthic dinoflagellate genera in this study, except Ostreopsis, which was found to be more abundant in phosphorus-rich macroalga habitats. The data also shows an increase of benthic dinoflagellate cell density up to seven times compared to the previous research data in 2012 and 2013. That trend indicates an increase in the disturbance and pressure on the macroalgae and seagrass habitats of Pari Island, which require special attention to prevent the occurrence of toxic Benthic Harmful Algal Blooms (bHABs) and CFP cases in the island.
{"title":"Kelimpahan Dinoflagellata Bentik Berbahaya di Habitat Lamun dan Makroalga di Pulau Pari, Kepulauan Seribu, Indonesia","authors":"Mochamad Ramdhan Firdaus, Arief Rachman, Oksto Ridho Sianturi, Diah Anggraini Wulandari, Hanny Meirinawati, Mariana D. B. Intan, Edy Endrotjahyo","doi":"10.14203/oldi.2021.v6i3.382","DOIUrl":"https://doi.org/10.14203/oldi.2021.v6i3.382","url":null,"abstract":"<p class=\"Papertext\"><strong>The Abundance of the Harmful Benthic Dinoflagellate in the Seagrass and Macroalgae Habitats on Pari Island, Thousand Islands, Indonesia. </strong>Benthic dinoflagellates are an important part of benthic ecosystems and part of their ecological functions. However, ciguatoxin (CTX) producer dinoflagellates, which could cause Ciguatera Fish Poisoning (CFP) disease, is a known threat to marine biota and the island’s coastal communities, such as in Pari Island. Thus, this research aimed is to study the population of five harmful and toxin producer benthic dinoflagellate genera, namely <span style=\"text-decoration: underline;\">Amphidinium</span>, <span style=\"text-decoration: underline;\">Coolia</span>, <span style=\"text-decoration: underline;\">Gambierdiscus</span>, <span style=\"text-decoration: underline;\">Ostreopsis</span>, and <span style=\"text-decoration: underline;\">Prorocentrum</span>, in macroalgae and seagrass habitats of Pari Island. Benthic dinoflagellate samples were collected in Juni 2019 using artificial substrates in the form of a 10×15 cm nylon screen. Environmental variables, such as nutrient concentration (nitrogen and phosphorus) and water temperature were also measured. The results showed that the average benthic dinoflagellate density in seagrass habitats was four times higher compared to the macroalgae habitats. <em>Gambierdiscus</em> were found as the most abundant benthic dinoflagellate in seagrass habitats, while <em>Prorocentrum</em> were more abundant in macroalgae habitats. Principal Component Analysis (PCA) showed that the N:P ratio was the most important regulating parameter for most benthic dinoflagellate genera in this study, except <em>Ostreopsis</em>, which was found to be more abundant in phosphorus-rich macroalga habitats. The data also shows an increase of benthic dinoflagellate cell density up to seven times compared to the previous research data in 2012 and 2013. That trend indicates an increase in the disturbance and pressure on the macroalgae and seagrass habitats of Pari Island, which require special attention to prevent the occurrence of toxic Benthic Harmful Algal Blooms (bHABs) and CFP cases in the island.</p>","PeriodicalId":202832,"journal":{"name":"OLDI (Oseanologi dan Limnologi di Indonesia)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127339428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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