Seagrass is the most effective ecosystem in absorbing carbon. The ability of seagrasses to absorb... more Seagrass is the most effective ecosystem in absorbing carbon. The ability of seagrasses to absorb CO2 from the atmosphere is better than terrestrial ecosystems. Image processing methods and information regarding potential carbon stocks in seagrass beds can then be used as a basis for managing carbon stocks found in coastal areas and small islands. This study aims to estimate the carbon stock of seagrass beds in the waters of Kodingarenglompo Island using remote sensing technology. This research was conducted from March to August 2020. The stages of the field survey were to identify the percentage of seagrass cover in 62 plot points. Seagrass carbon stocks are known based on seagrass cover percentage data using the regression equation. The estimation of seagrass carbon stocks in the study area is divided into two, namely AGC and BGC. The image processing stage is by using the random forest regression algorithm in mapping seagrass carbon stocks. The results of this research survey rev...
IOP Conference Series: Earth and Environmental Science
Harmful algal blooms (HAB) are a phenomenon of drastically increasing phytoplankton populations, ... more Harmful algal blooms (HAB) are a phenomenon of drastically increasing phytoplankton populations, which can cause problems in aquatic ecosystems. Dinoflagellate cysts are a type of phytoplankton that are the main source of causing the HAB phenomenon; this occurs due to unfavorable environmental conditions. The Southern Estuary of South Sulawesi has high fishery resources and high primary productivity. The coastal areas around these waters are widely used for anthropogenic activities that trigger nutrient increases. There are no studies on HAB, especially the abundance and community structure of dinoflagellate cysts at this location. This study aims to identify the types, abundance, and species assemblages of dinoflagellate cysts in the three estuaries of southern South Sulawesi. Sampling was carried out at three locations, namely the Pappa River Estuary, the Kelara River Estuary, and the Calendu River Estuary, in January 2022. Each location consists of 4 stations, 3 sub-stations with...
IOP Conference Series: Earth and Environmental Science, 2020
Yellowfin parrotfishScarus flavipectoralishas a wide distribution in Indo-Pacific waters which ha... more Yellowfin parrotfishScarus flavipectoralishas a wide distribution in Indo-Pacific waters which has an important ecological role in maintaining the balance of coral reef ecosystems, as well as having important economic values that need to be managed sustainably. This study aims to analyze the sex ratio, gonad maturity stage, and the size at first maturity. This study was conducted on a population of yellowfin parrotfish in the Wallace line at Spermonde Archipelago, South Sulawesi. Fish samples were obtained from catches of fishermen who were landed at the Rajawali Fish Landing Area of Makassar City. The results of this study indicate that the sex ratio of yellowfin parrotfish not balanced between male and female, there was more female than male; the development of gonad maturity stage is synchronous between male and female; and the size at the first maturity sexual of yellowfin parrotfish female was 18 cm and the male was 21.7 cm.
This activity aims to carry out the process of dissolving oxygen improved in a symbiotic mass cul... more This activity aims to carry out the process of dissolving oxygen improved in a symbiotic mass culture media using nanobubble injectors conducted by the MINARI small business group under the supervision of Universitas Hasanuddin. Synbiotic is used by fish farmers, breeders, and farmers to enhance growth, immunity in fish and shrimp, and host resistance to pathogenic infections. Observations were made in January - August 2019. The results of the activity showed that Bacillus subtilis cultured was aerated using a nanobubble could increase double of dissolved oxygen concentration. Applying the nanobubble at culture media also increasing the growth of B. subtilis bacteria and speeding up harvest time of synbiotic. The nanobubble aeration technique could increase synbiotics production by 5 times. Increase synbiotic production causes the number of sales also increase and expanding the marketing area. Before using Nano Bubble Technology, this group only supplied 8 regencies-cities totalling 289 L synbiotics (January-April). After using nanobubble technology, production increased to 709 L and supplied 13 districts-cities (May-August). The three regions with the highest demand for synbiotics are Soppeng Regency (262 L), Palopo City (142 L), and Sidrap Regency (110 L).
Based on the results obtained from this study, it can be concluded that: (1). Halimeda sp density... more Based on the results obtained from this study, it can be concluded that: (1). Halimeda sp density based on stations, there is a noticeable difference between station 1 and station 3, (2)Halimeda sp density based on the research time, namely there is a noticeable difference between the study time in July and October, (3) Padina sp density based on stations, there is a noticeable difference between station 1 and station 2, and (4). The density of Padina sp is based on the time of the study, that is, there is a noticeable difference between the time of the study in July and October.
IOP Conference Series: Earth and Environmental Science, 2020
Increased use of fossil fuels, land use change, and deforestation, causing an increase in carbon ... more Increased use of fossil fuels, land use change, and deforestation, causing an increase in carbon emissions in the atmosphere, is estimated to 4.1 ± 0.1 GtC year−1, it lowers the pH in the oceans, causing ocean acidification which affects the productivity of calcifying and non- calcifying phytoplankton. The study was conducted to analyze the photophysiology response of non-calcifying microalgae Chaetoceros sp on increasing anthropogenic carbon dioxide and temperature. There were 3 levels of CO2 concentration, and temperature was tested (385 ppm, 750 ppm, 1000 ppm CO2 and temperature of 30°C, 32°C and 34°C) with the factorial pattern. The results showed that increasing CO2 concentration affected the growth of daily population, peak population, the rate of cell growth, and chlorophyll content of Chaetoceros sp. The highest population growth and chlorophyll content occurred at 385 ppm CO2 and 32°C, population decreased with increasing CO2 concentration and temperature. Increasing carbon...
IOP Conference Series: Earth and Environmental Science, 2019
Mangroves are known to play a role in fisheries production, but specifically, however the associa... more Mangroves are known to play a role in fisheries production, but specifically, however the associations between economically important fish species and mangroves with varied characteristics are not yet widely known. The aim of this study was to analyse the relationship (association) between economically important fish species and mangroves with varied characteristics in Maumere Bay, Indonesia. The research used spatial and non-spatial methods; the research on economically important fish species used an experimental fishing sampling method. Correspondence analysis was applied to answer the question why certain economically important fish species were associated with certain mangrove characteristics. The mangroves at the study locations with characteristically dominant species Bruguiera parviflora, Avicennia alba, Bruguiera gymnorrhiza, Ceriops tagal, with a moderate value of the Shannon diversity index (1< H’ ≤3), and moderate value of the Simpson dominance index (0.5< C ≤0.75),...
IOP Conference Series: Earth and Environmental Science, 2020
The introduction of many aquatic species into new habitats have been recorded to be invasive and ... more The introduction of many aquatic species into new habitats have been recorded to be invasive and later threatened the native species present in that habitat. The unique biogeography of the Wallace region, particularly Sulawesi Island characterized by having high endemic fauna. Several lakes in Sulawesi have experienced the population reduction of endemic species due to introduced species that become invasive. This paper intended to review the aquatic invasive species and their distribution in the Wallace region. The literature review revealed the number of invasive species introduced in the Wallace region varies from 1 species to 12 species, the highest found in Lake Tondano. This preliminary review record that Malili lakes are most researched, both for endemic species and invasive species, based on the number of publications found through an internet search, with publications on endemic species, are more than invasive species. Among 13 lakes in Sulawesi, 4 lakes, namely Lake Moat, ...
Most dinoflagellate had a resting cyst in their life cycle. This cyst was developed in unfavorab... more Most dinoflagellate had a resting cyst in their life cycle. This cyst was developed in unfavorable environmental condition. The conventional method for identifying dinoflagellate cyst in natural sediment requires morphological observation, isolating, germinating and cultivating the cysts. PCR is a highly sensitive method for detecting dinoflagellate cyst in the sediment. The aim of this study is to examine whether CO1 primer could detect DNA of multispecies dinoflagellate cysts in the sediment from our sampling sites. Dinoflagellate cyst DNA was extracted from 16 sediment samples. PCR method using COI primer was running. The sequencing of dinoflagellate cyst DNA was using BLAST. Results showed that there were two clades of dinoflagellate cysts from four locations of study. Clade 1 was dominated by samples from the Jeneberang Estuary (JB), Maros Estuary (M) and Pangkep Estuary(P), while clade 2 was dominated by samples from the Paotere Port (PP). The genetic distance varied betwe...
Mikroplastik di perairan menjadi permasalahan yang cukup serius bagi organisme perairan. Organism... more Mikroplastik di perairan menjadi permasalahan yang cukup serius bagi organisme perairan. Organisme filter feeder seperti kerang memiliki resiko yang cukup besar untuk mengakumulasi mikroplastik ke dalam tubuhnya. Salah satu jenis organisme tersebut ialah kerang manila (Venerupis philippinarum) yang banyak terdapat di Perairan Maccini Baji, Kecamatan Labakkang, Kabupaten Pangkajene Kepulauan, Sulawesi Selatan. Penelitian ini bertujuan untuk mengetahui keberadaan dan konsentrasi mikroplastik yang terdapat pada daging kerang manila (Venerupis philippinarum). Pengambilan sampel kerang dilakukan dengan metode sampling acak berlapis (stratified random sampling), sehingga diperoleh sampel sebanyak 118 ekor. 118 sampel kerang manila tersebut kemudian dibagi menjadi tiga kelompok ukuran panjang cangkang kerang yaitu kelas A (3,11 – 3,86 cm), kelas B (3,87 – 4,82 cm), kelas C (4,83 – 6,01 cm). Pengamatan partikel mikroplastik dilakukan dengan menggunakan mikroskop stereo. Hasil pengamatan men...
Seagrass is the most effective ecosystem in absorbing carbon. The ability of seagrasses to absorb... more Seagrass is the most effective ecosystem in absorbing carbon. The ability of seagrasses to absorb CO2 from the atmosphere is better than terrestrial ecosystems. Image processing methods and information regarding potential carbon stocks in seagrass beds can then be used as a basis for managing carbon stocks found in coastal areas and small islands. This study aims to estimate the carbon stock of seagrass beds in the waters of Kodingarenglompo Island using remote sensing technology. This research was conducted from March to August 2020. The stages of the field survey were to identify the percentage of seagrass cover in 62 plot points. Seagrass carbon stocks are known based on seagrass cover percentage data using the regression equation. The estimation of seagrass carbon stocks in the study area is divided into two, namely AGC and BGC. The image processing stage is by using the random forest regression algorithm in mapping seagrass carbon stocks. The results of this research survey rev...
IOP Conference Series: Earth and Environmental Science
Harmful algal blooms (HAB) are a phenomenon of drastically increasing phytoplankton populations, ... more Harmful algal blooms (HAB) are a phenomenon of drastically increasing phytoplankton populations, which can cause problems in aquatic ecosystems. Dinoflagellate cysts are a type of phytoplankton that are the main source of causing the HAB phenomenon; this occurs due to unfavorable environmental conditions. The Southern Estuary of South Sulawesi has high fishery resources and high primary productivity. The coastal areas around these waters are widely used for anthropogenic activities that trigger nutrient increases. There are no studies on HAB, especially the abundance and community structure of dinoflagellate cysts at this location. This study aims to identify the types, abundance, and species assemblages of dinoflagellate cysts in the three estuaries of southern South Sulawesi. Sampling was carried out at three locations, namely the Pappa River Estuary, the Kelara River Estuary, and the Calendu River Estuary, in January 2022. Each location consists of 4 stations, 3 sub-stations with...
IOP Conference Series: Earth and Environmental Science, 2020
Yellowfin parrotfishScarus flavipectoralishas a wide distribution in Indo-Pacific waters which ha... more Yellowfin parrotfishScarus flavipectoralishas a wide distribution in Indo-Pacific waters which has an important ecological role in maintaining the balance of coral reef ecosystems, as well as having important economic values that need to be managed sustainably. This study aims to analyze the sex ratio, gonad maturity stage, and the size at first maturity. This study was conducted on a population of yellowfin parrotfish in the Wallace line at Spermonde Archipelago, South Sulawesi. Fish samples were obtained from catches of fishermen who were landed at the Rajawali Fish Landing Area of Makassar City. The results of this study indicate that the sex ratio of yellowfin parrotfish not balanced between male and female, there was more female than male; the development of gonad maturity stage is synchronous between male and female; and the size at the first maturity sexual of yellowfin parrotfish female was 18 cm and the male was 21.7 cm.
This activity aims to carry out the process of dissolving oxygen improved in a symbiotic mass cul... more This activity aims to carry out the process of dissolving oxygen improved in a symbiotic mass culture media using nanobubble injectors conducted by the MINARI small business group under the supervision of Universitas Hasanuddin. Synbiotic is used by fish farmers, breeders, and farmers to enhance growth, immunity in fish and shrimp, and host resistance to pathogenic infections. Observations were made in January - August 2019. The results of the activity showed that Bacillus subtilis cultured was aerated using a nanobubble could increase double of dissolved oxygen concentration. Applying the nanobubble at culture media also increasing the growth of B. subtilis bacteria and speeding up harvest time of synbiotic. The nanobubble aeration technique could increase synbiotics production by 5 times. Increase synbiotic production causes the number of sales also increase and expanding the marketing area. Before using Nano Bubble Technology, this group only supplied 8 regencies-cities totalling 289 L synbiotics (January-April). After using nanobubble technology, production increased to 709 L and supplied 13 districts-cities (May-August). The three regions with the highest demand for synbiotics are Soppeng Regency (262 L), Palopo City (142 L), and Sidrap Regency (110 L).
Based on the results obtained from this study, it can be concluded that: (1). Halimeda sp density... more Based on the results obtained from this study, it can be concluded that: (1). Halimeda sp density based on stations, there is a noticeable difference between station 1 and station 3, (2)Halimeda sp density based on the research time, namely there is a noticeable difference between the study time in July and October, (3) Padina sp density based on stations, there is a noticeable difference between station 1 and station 2, and (4). The density of Padina sp is based on the time of the study, that is, there is a noticeable difference between the time of the study in July and October.
IOP Conference Series: Earth and Environmental Science, 2020
Increased use of fossil fuels, land use change, and deforestation, causing an increase in carbon ... more Increased use of fossil fuels, land use change, and deforestation, causing an increase in carbon emissions in the atmosphere, is estimated to 4.1 ± 0.1 GtC year−1, it lowers the pH in the oceans, causing ocean acidification which affects the productivity of calcifying and non- calcifying phytoplankton. The study was conducted to analyze the photophysiology response of non-calcifying microalgae Chaetoceros sp on increasing anthropogenic carbon dioxide and temperature. There were 3 levels of CO2 concentration, and temperature was tested (385 ppm, 750 ppm, 1000 ppm CO2 and temperature of 30°C, 32°C and 34°C) with the factorial pattern. The results showed that increasing CO2 concentration affected the growth of daily population, peak population, the rate of cell growth, and chlorophyll content of Chaetoceros sp. The highest population growth and chlorophyll content occurred at 385 ppm CO2 and 32°C, population decreased with increasing CO2 concentration and temperature. Increasing carbon...
IOP Conference Series: Earth and Environmental Science, 2019
Mangroves are known to play a role in fisheries production, but specifically, however the associa... more Mangroves are known to play a role in fisheries production, but specifically, however the associations between economically important fish species and mangroves with varied characteristics are not yet widely known. The aim of this study was to analyse the relationship (association) between economically important fish species and mangroves with varied characteristics in Maumere Bay, Indonesia. The research used spatial and non-spatial methods; the research on economically important fish species used an experimental fishing sampling method. Correspondence analysis was applied to answer the question why certain economically important fish species were associated with certain mangrove characteristics. The mangroves at the study locations with characteristically dominant species Bruguiera parviflora, Avicennia alba, Bruguiera gymnorrhiza, Ceriops tagal, with a moderate value of the Shannon diversity index (1< H’ ≤3), and moderate value of the Simpson dominance index (0.5< C ≤0.75),...
IOP Conference Series: Earth and Environmental Science, 2020
The introduction of many aquatic species into new habitats have been recorded to be invasive and ... more The introduction of many aquatic species into new habitats have been recorded to be invasive and later threatened the native species present in that habitat. The unique biogeography of the Wallace region, particularly Sulawesi Island characterized by having high endemic fauna. Several lakes in Sulawesi have experienced the population reduction of endemic species due to introduced species that become invasive. This paper intended to review the aquatic invasive species and their distribution in the Wallace region. The literature review revealed the number of invasive species introduced in the Wallace region varies from 1 species to 12 species, the highest found in Lake Tondano. This preliminary review record that Malili lakes are most researched, both for endemic species and invasive species, based on the number of publications found through an internet search, with publications on endemic species, are more than invasive species. Among 13 lakes in Sulawesi, 4 lakes, namely Lake Moat, ...
Most dinoflagellate had a resting cyst in their life cycle. This cyst was developed in unfavorab... more Most dinoflagellate had a resting cyst in their life cycle. This cyst was developed in unfavorable environmental condition. The conventional method for identifying dinoflagellate cyst in natural sediment requires morphological observation, isolating, germinating and cultivating the cysts. PCR is a highly sensitive method for detecting dinoflagellate cyst in the sediment. The aim of this study is to examine whether CO1 primer could detect DNA of multispecies dinoflagellate cysts in the sediment from our sampling sites. Dinoflagellate cyst DNA was extracted from 16 sediment samples. PCR method using COI primer was running. The sequencing of dinoflagellate cyst DNA was using BLAST. Results showed that there were two clades of dinoflagellate cysts from four locations of study. Clade 1 was dominated by samples from the Jeneberang Estuary (JB), Maros Estuary (M) and Pangkep Estuary(P), while clade 2 was dominated by samples from the Paotere Port (PP). The genetic distance varied betwe...
Mikroplastik di perairan menjadi permasalahan yang cukup serius bagi organisme perairan. Organism... more Mikroplastik di perairan menjadi permasalahan yang cukup serius bagi organisme perairan. Organisme filter feeder seperti kerang memiliki resiko yang cukup besar untuk mengakumulasi mikroplastik ke dalam tubuhnya. Salah satu jenis organisme tersebut ialah kerang manila (Venerupis philippinarum) yang banyak terdapat di Perairan Maccini Baji, Kecamatan Labakkang, Kabupaten Pangkajene Kepulauan, Sulawesi Selatan. Penelitian ini bertujuan untuk mengetahui keberadaan dan konsentrasi mikroplastik yang terdapat pada daging kerang manila (Venerupis philippinarum). Pengambilan sampel kerang dilakukan dengan metode sampling acak berlapis (stratified random sampling), sehingga diperoleh sampel sebanyak 118 ekor. 118 sampel kerang manila tersebut kemudian dibagi menjadi tiga kelompok ukuran panjang cangkang kerang yaitu kelas A (3,11 – 3,86 cm), kelas B (3,87 – 4,82 cm), kelas C (4,83 – 6,01 cm). Pengamatan partikel mikroplastik dilakukan dengan menggunakan mikroskop stereo. Hasil pengamatan men...
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