ORCID Profile
0000-0001-9276-7492
Current Organisations
Universidade de São Paulo Faculdade de medicina
,
Universitas Hasanuddin
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Publisher: IOP Publishing
Date: 03-2020
DOI: 10.1088/1755-1315/473/1/012006
Abstract: The rabbitfish ( Siganus guttatus ) is a fish which has a high economic value also became one of the most popular types of fish consumed by the Takalar people up to Makassar City. The high market demand makes the effort to catch fishermen become greater so that the pressure on this species also becomes greater. therefore this research is needed to provide information in the preparation of comprehensive and systematic management strategies by policy makers to maintain the sustainability and sustainability of Siganus guttatus resources in the waters. The scope of this research includes information on rabbitfish habitat, abundance, feeding habits, sex ratio, and gonad maturity level (GML), as well as to compare the distribution pattern, gut content and GML in seagrass and coral reef ecosystems. This research was carried out from March to June 2017 in Laikang Bay, Takalar Regency, South Sulawesi Province, Indonesia. Rabbitfish s les (N = 336) were collected, comprising 293 males and 43 females with the size ranges of 11.2 – 35.9 cm and 8.4 – 35.4 cm, respectively. GML ranged from I – V. The GML in coral reef ecosystem was generally higher than in seagrass. The GML and number of in iduals from the coral reef ecosystem were: GML I (133 fish), GML II (84 fish), GML III (30 fish), GML IV (12 fish), GML V (8 fish) whereas from seagrass ecosystem, GML I (12 fish), GML II (11 fish), GML III (2 fish). Gut content analysis found 36 phytoplankton species the taxa comprising the highest percentages were Thallassiothrix sp. (69.24%) in the coral reef ecosystem and Oscillatoria sp. (26.34 %) in seagrass.
Publisher: Elsevier BV
Date: 02-2019
Publisher: Science Alert
Date: 15-04-2016
Publisher: Springer Science and Business Media LLC
Date: 18-10-2020
DOI: 10.1007/S13280-019-01267-X
Abstract: Invertebrate gleaning (walking) fisheries are common within intertidal seagrass meadows globally, contributing to the food supply of hundreds of millions of people, but understanding of these fisheries and their ecological drivers are extremely limited. The present study provides a unique analysis of these fisheries using a combined social and ecological approach. Catches contained 34 species and were dominated by Bivalves, Urchins and Gastropods. CPUE in all sites varied from 0.05 to 3 kg gleaner −1 hr −1 , respectively, with the majority of fishers being women and children. Landings were of major significance for local food supply and livelihoods at all sites. Local ecological knowledge suggests seagrass meadows are declining in line with other regional trends. Increasing seagrass density significantly and positively correlated with CPUE of the invertebrate gleaning ( r = 0.830) highlighting the importance of conserving these threatened habitats. Understanding the complexities of these fisheries, their supporting habitats and their sustainability is important for the support of sustainable coastal livelihoods.
Publisher: Proceedings of the National Academy of Sciences
Date: 21-12-2020
Abstract: Support for marine-based “blue growth” policies derives from their potential to simultaneously address United Nations Sustainable Development (SD) Goals on poverty alleviation and marine conservation. Modeling the linkages between a rural coastal economy and local fish resources, this work provides a rigorous ex ante assessment of common strategies to achieve SD objectives. We find that most of the considered policies increase target household incomes, negatively impact some nontarget households, and further deplete nearshore fish stocks. The results underscore the importance of considering characteristics of local economies and household linkages to marine and land resources when designing SD policies to avoid unintended consequences.
Publisher: IOP Publishing
Date: 09-2020
DOI: 10.1088/1755-1315/564/1/012073
Abstract: Coastal and island communities depend heavily on marine resources for their food and income. During the west monsoon (September to February), fishermen rarely go to sea, and their activities are limited to the small-scale fisheries, including gleaning the Enhalus acoroides fruits. Participants in this small-scale fishery sector are mainly women with little or no skill required, these gleaners are often overlooked by the district level fisheries-related census. This case study focused on the role of coastal women with different levels of knowledge and utilization of E. acoroides in three cities/districts of South Sulawesi. This study aimed to determine the contribution of E. acoroides fruit collection to coastal community livelihoods and food security, to identify the impacts, and to seek alternative solutions for seagrass management. Qualitative methods were used to gather information on E. acoroides fruit collection, fishery knowledge, livelihood contributions, perceptions of seagrass condition, and alternative management solutions. Around 90% of E. acoroides fruit collectors were women aged between 30 to 80 years old. Women contribute greatly to livelihoods and food security in coastal areas because they play dominant roles in household affairs and the sale of fishery products. Unfortunately, the methods currently used for collecting E. acoroides fruit can be destructive and may have contributed to the decline in seagrass cover. However, prohibiting the collection of E. acoroides would not be an appropriate solution. A win-win solution is needed to empower women while simultaneously managing seagrass ecosystems sustainably.
Publisher: Universitas Gadjah Mada
Date: 18-08-2023
DOI: 10.22146/IJG.78701
Abstract: Seagrass meadows provide a variety of material, non-material and regulatory coastal ecosystem service however, as the distribution of seagrass beds changes over time due to both anthropogenic activities and natural factors, it is important to monitor changes in seagrass condition. Seagrass meadows in Palu Bay are threatened by activities such as coastal development and land reclamation. Additionally, the bay was hit by a significant tsunami in 2018, which could have impacted ecosystems in the bay, including seagrass meadows. The aim of this study was to detect changes in seagrass extent and distribution over a 10-year period from 2012 to 2022 and changes in land use over approximately a decade (2010 and 2021) through the use of remote sensing technology. Changes in eagrass meadow areal extent were analyzed using data from a 2012 Landsat 7 Satellite Data Acquisition and a 2022 Landsat 8 Satellite Data Acquisition. Water column correction was implemented using the Lyzenga Algorithm. The results showed a significant decrease in the area of seagrass meadows around the coastal area of Palu Bay. Seagrass meadows in 2012 and 2022 covered 127.08 Ha and 87.79 Ha, respectively, indicating a decrease in extent of 43.29 Ha. As the accuracy of the satellite data classification results was 80%, the results are considered acceptable. Anthropogenic activities (mainly mining and construction related) are strongly suspected as the main drivers of this decline, while earthquake and tsunami events likely aggravated the degradation of coastal ecosystems in Palu Bay, including seagrass meadows.
Publisher: Springer Science and Business Media LLC
Date: 29-07-2019
Publisher: Elsevier BV
Date: 09-2014
DOI: 10.1016/J.MARPOLBUL.2014.07.002
Abstract: Seagrass is particularly susceptible to environmental degradation. The objective of the study is to develop an effective bioindicator to assess human-induced effects using morphological variation and fluctuating asymmetry (FA) of seagrass. S les were collected from eight islands situated at different distance from mainland with different human population density and therefore expected to experience different level of anthropogenic pressure. Cd, Pb, Cu, Zn, nitrate, and phosphate were measured. Metals were also measured in tissues of seagrass. Metal concentrations in sediment, water, and seagrass did not exceed the quality standards required for marine life. Heterogeneity of FA was found among sites suggesting that there are some factors changing developmental instability of seagrass which is not associated to particular toxicants. This baseline study indicates that the water condition is still natural and shows no signs of metal contamination, therefore it does not cause a detectable stress on morphological variation and FA of seagrass.
Publisher: Bentham Science Publishers Ltd.
Date: 10-06-2014
Publisher: Elsevier BV
Date: 07-2018
DOI: 10.1016/J.JENVMAN.2018.04.047
Abstract: Scuba ing tourism is a sustainable source of income for many coastal communities, but can have negative environmental impacts if not managed effectively. Diving on soft sediment habitats, typically referred to as 'muck ing', is a growing multi-million dollar industry with a strong focus on photographing cryptobenthic fauna. We assessed how the environmental impacts of scuba ers are affected by the activity they are engaged in while ing and the habitat they e in. To do this, we observed 66 ers on coral reefs and soft sediment habitats in Indonesia and the Philippines. We found er activity, specifically interacting with and photographing fauna, causes greater environmental disturbances than effects caused by certification level, gender, e experience or age. Divers touched the substrate more often while ing on soft sediment habitats than on coral reefs, but this did not result in greater environmental damage on soft sediment sites. Divers had a higher impact on the substrate and touch animals more frequently when observing or photographing cryptobenthic fauna. When using dSLR-cameras, ers spent up to five times longer interacting with fauna. With the unknown, long-term impacts on cryptobenthic fauna or soft sediment habitats, and the increasing popularity of underwater photography, we argue for the introduction of a muck ing code of conduct.
Publisher: Proceedings of the National Academy of Sciences
Date: 24-10-2017
Abstract: The exceptional ersity of species in the coral reefs, seagrass meadows, and mangrove forests of the Coral Triangle and the many ecological functions and benefits to humans they provide have made them a high priority for conservation and fisheries management. Nevertheless, their degradation continues and calls for effective restoration. In an experimental restoration, we demonstrated that planting mixtures of erse seagrass species improves their overall survival and growth and thus the trajectory toward successful restoration. Incorporating species ersity into restoration heralds a shift in practice from establishing a single founder species, and recognizes the widely documented positive effects that bio ersity has on ecosystem function and services. Bio ersity is often a restoration goal, but it also promises a means to improve success.
Publisher: UNS Solo
Date: 14-10-2019
Abstract: Seagrass ecosystems are under threat worldwide. Seagrass transplantation is one restoration approach which is has been tried with uneven success. While transplantation methods and oceanographic parameters have been investigated in attempts to understand the factors affecting transplant survival rate and seagrass transplantation success, little attention has been paid to the possible impact of pests. We observed borer molluscs in a seagrass Enhalus acoroides both from natural bed and transplant area. This is thought to be the first record from Indonesian waters of these bivalve molluscs of the genus Zachsia, family Teredinidae, the only mollusc genus known to bore into seagrass rhizomes. In a further eleven E. acoroides shoots (average length 10.5cm) we found between one and four calcareous burrows 2mm to 5mm in diameter inside the rhizome. Further research is required to determine the species present and its distribution in Indonesian waters as well as the true ecological impact of Zachsia sp. on seagrasses.
Publisher: Elsevier BV
Date: 2008
Publisher: IOP Publishing
Date: 03-2020
DOI: 10.1088/1755-1315/473/1/012138
Abstract: Increased human activity in all sectors due to rapid development, often resulting in pollutants such as heavy metals that have an impact on the environment and one alternative is phytotechnology. This study aims to (1) Determine the seagrass’s capacity to absorb lead (Pb) and copper (Cu), (2) Determine the optimization of seagrass, sediment, and seawater in absorbing Pb and Cu. This study was an experimental study carried out at the Hasanuddin University hatchery unit, Barrang Lompo Island, then analysis of Pb and Cu metal content in the Analytical Chemistry Laboratory of the Department of Chemistry, Faculty of Mathematics and Natural Sciences, Hasanuddin University using the Atomic Absorption Spectrophotometer (AAS). The results showed that Enhalus acoroides seagrass had capacity dal am absorbed Pb of 0.08 mg/kg at a concentration of 120 ppm, while dal am absorbed Cu of 0.65 mg/kg at a concentration of 2 ppm, so that this seagrass is more effective at absorbing Cu than Pb, the Pb optimum results in seawater at a concentration of 120 ppm at 3.04 mg / L and sediment at an concentration of 80 ppm at 29.30 mg/kg, while the optimum yield of Cu content in seawater and sediments, obtained at concentrations of 1 ppm and 2 ppm, namely 0.56 mg/L in seawater and at a concentration of 4 ppm is 29, 67 mg / kg in sediment. While the optimal absorption of Pb by seagrass occurs at low concentrations of 40 ppm and 80 ppm of 0.07 mg/kg. The same result was obtained in sediments, 29.22 mg/kg at a concentration of 40 ppm. While the optimum Pb content in seawater is at a concentration of 40 ppm of 1.26 mg / L.
Publisher: Elsevier BV
Date: 06-2022
Publisher: IOP Publishing
Date: 03-2018
Publisher: Springer Science and Business Media LLC
Date: 09-12-2022
Publisher: IOP Publishing
Date: 03-2020
DOI: 10.1088/1755-1315/473/1/012058
Abstract: Coral reefs are currently suffering from serious degradation due to human activities. In 2015, the condition of coral reefs in Kapoposang Island has been very poor with the live coral cover only 16%. Therefore, the coral reef ecosystem on this island needs to be rehabilitated. This study aims to assess coral cover based on the age of transplantation and examine abundance of reef fish in relation to age of transplant module at Kapoposang Island which is in the Wallacea region. Coral transplant was carried out from 2014 to 2018. The transplanted corals were corals of the genus Acropora. Transplants were carried out at a depth 3 to 4 m. The determination of the transplant module as the reef fish’s observation was based on the age of the transplant module, i.e. 1, 2, 3 and 4 years old. Data collection was carried out using the UVC (Underwater Visual Census) method. Data collection was done by using the UPT (Underwater Photo Transect) method. Photograph data was processed using CPCe (Coral Point Count with Excel extension) software using 30 random points for each frame. The significant relationship between live coral cover and reef fish shows that the coral transplantation was successful. There was linear relation between coral habitat cover and the reef fish. The difference in abundance in each transplant module shows the linier relation between the increase of reef fishes and live coral cover. The live coral cover was higher at the two and three years old of the transplant module. During the study, it was found 13 families and 56 species of reef fish. Planktivorous group was the most dominant of reef fish.
Publisher: IOP Publishing
Date: 09-04-2019
Publisher: Springer Japan
Date: 2014
Publisher: Walter de Gruyter GmbH
Date: 22-11-2018
Abstract: Seagrass hydrodynamic regimes are important to understand and also to guide seagrass restoration, which is of great interest in Indonesia because of environmental threats to the exceptionally high seagrass species richness. Hydrodynamic regimes influence the physical stability of seagrass beds, sedimentation rates, and the advection of nutrients and food to seagrasses and associated organisms. In a flume, we determined the effect of canopies of Cymodocea rotundata , Enhalus acoroides , Halodule uninervis , Syringodium isoetifolium and Thalassia hemprichii on water velocity, turbulence, turbulence intensity and shear velocity. The taller canopies of Enhalus and Cymodocea slowed water flow, but the shorter canopies ( cm) had little effect. Seagrasses did not influence turbulence and turbulence intensity (turbulence normalized to mean velocity) but they reduced shear velocity U*. Our results indicate that Enhalus is a good candidate for transplantation in terms of reducing mean water flow and shear velocities, but that Halodule should also be considered as it also reduced shear velocities and it spreads quickly after transplantation. Our results extend the understanding of seagrass-hydrodynamic relationships to include very short canopies, unlike the taller canopies studied to date.
Publisher: No publisher found
Date: 2017
Publisher: Springer Science and Business Media LLC
Date: 09-06-2022
Publisher: Springer Science and Business Media LLC
Date: 08-09-2023
Publisher: Wiley
Date: 20-09-2017
DOI: 10.1111/NAN.12430
Publisher: Elsevier BV
Date: 11-2015
Publisher: Informa UK Limited
Date: 23-04-2008
Publisher: IOP Publishing
Date: 20-02-2019
Publisher: MDPI AG
Date: 18-03-2021
DOI: 10.3390/APP11062730
Abstract: Increasing temperature and CO2 concentration are among the most important factors affecting marine ecosystems under climate change. We investigated the morphological, biochemical, and physiological trait responses of seedlings of the tropical seagrass Enhalus acoroides under experimental conditions. Trait responses were greater under temperature effects than increasing CO2 concentration. Seedlings under rising temperatures showed enhanced leaf growth, lower leaf nutrient content, and stimulated down-regulating mechanisms in terms of photo-physiology. Increasing CO2 concentrations did not show any significant effects independently. There was a significant interaction for some of the trait responses considered, such as leaf number and carbon content in the roots, and trends of higher starch concentrations in the leaves and lower rETRmax under combined enriched CO2 and high temperature, even though none of these interactions were synergistic. Understanding the single and interactive trait responses of seagrass seedlings to increasing temperature and CO2 concentration is of importance to determine the relative responses of early life stages of seagrasses, which may differ from adult plants, in order to form a more holistic view of seagrass ecosystem health under climate change.
Publisher: Magnolia Press
Date: 07-06-2023
DOI: 10.11646/ZOOTAXA.5298.1.1
Abstract: Sponges in Indonesia have been studied since the 19th century during several historical expeditions and international collaborations. Hundreds of new species were reported from various locations, e.g., Ambon, Ternate, Sulawesi, Aru, and Kei Islands. This study aimed to create a sponge (Porifera: Calcarea, Demospongiae, Hexactinellida, and Homoscleromorpha) species checklist from Indonesia based on World Porifera Database. With a total of 731 species, our checklist comprises approximately 45 species of Calcarea, 566 species of Demospongiae, 115 species of Hexactinellida, and five species of Homoscleromorpha. The number of species are recorded from 12 marine ecoregions across the Indonesian Archipelago and freshwater habitats (Spongillida) between 1820–2021. The species composition indicates higher regional endemism or poorly studied since no other report after the original description. However, several marine ecoregions of Indonesia remain highly overlooked (e.g., Northeast Sulawesi, Papua, Southern Java, Western Sumatra), including freshwater habitats. Therefore, a taxonomic bio ersity baseline study, particularly on Porifera, is necessary to better understand the aquatic and marine bio ersity in the Indonesia Archipelago.
Publisher: Frontiers Media SA
Date: 04-07-2019
Publisher: Wiley
Date: 19-02-2018
DOI: 10.1111/COBI.13033
Abstract: As ecosystems come under increasing anthropogenic pressure, rare species face the highest risk of extinction. Paradoxically, data necessary to evaluate the conservation status of rare species are often lacking because of the challenges of detecting species with low abundance. One group of fishes subject to this unders ling bias are those with cryptic body patterns. Twenty-one percent of cryptic fish species assessed for their extinction risk (International Union for Conservation of Nature [IUCN]) are data deficient. We developed a nondestructive method for surveying cryptically patterned marine fishes based on the presence of biofluorescence (underwater biofluorescence census, UBC). Blue LED torches were used to investigate how widespread biofluorescence was in cryptic reef fishes in the Coral Triangle region. The effectiveness of UBC to generate abundance data was tested on a data-deficient pygmy seahorse species (Hippoc us bargibanti) and compared with data obtained from standard underwater visual census (UVC) surveys. We recorded 95 reef fish species displaying biofluorescence, 73 of which had not been previously described as biofluorescent. Of those fish with cryptic patterns, 87% were biofluorescent compared with 9% for noncryptic fishes. The probability of species displaying biofluorescence was 70.9 times greater for cryptic species than for noncryptic species. Almost twice the number of H. bargibanti was counted using the UBC compared with UVC. For 2 triplefin species (Ucla xenogrammus, Enneapterygius tutuilae), the abundance detected with UBC was triple that detected with UVC. The UBC method was effective at finding cryptic species that would otherwise be difficult to detect and thus will reduce interobserver variability inherent to UVC surveys. Biofluorescence is ubiquitous in cryptic fishes, making this method applicable across a wide range of species. Data collected using UBC could be used with multiple IUCN criteria to assess the extinction risk of cryptic species. Adopting this technique will enhance researchers' ability to survey cryptic species and facilitate management and conservation of cryptic marine species.
Publisher: MDPI AG
Date: 10-08-2022
Abstract: It is widely recognized that humanity is currently facing multiple planetary crises, including the widespread loss of bio ersity and a rapidly changing climate. The impacts of these crises are often far reaching and threaten food security (SDG goal two: zero hunger). Small-scale fisheries are estimated to provide livelihoods for over one hundred million people and sustenance for approximately one billion people but face a plethora of threats and challenges linked to planetary crises. In this multi-country assessment (150 coastal villages across five countries within the Indo-Pacific), household interviews revealed how seagrass meadows are important to small-scale fisheries, particularly as a place to find and collect a reliable source of food. Interviews also revealed that habitat loss and the over-exploitation of these resources are placing people and their food security at risk. This study exposed how dynamic local ecological knowledge can be, uncovering personal opinions and responsibilities that result in the hybridization of knowledge. Here, we demonstrate the importance of using local ecological knowledge to incorporate shared values into management but also highlight that an integrated approach, pairing local and conventional scientific knowledge, is needed urgently if we are to meet the needs of people while simultaneously conserving bio ersity.
Publisher: Frontiers Media SA
Date: 23-12-2020
Abstract: Members of the family Symbiodiniaceae form symbiotic relationships with several metazoan groups on coral reefs, most notably scleractinian corals. However, despite their importance to the health of coral reefs, their relationship with other host organisms such as bioeroding sponges (Clionaidae) is still relatively understudied. In this study we investigate the presence and identity of Symbiodiniaceae in Clionaidae species in Indonesia and evaluate findings related to the evolution and ecology of the host-symbiont relationship. Clionaidae were collected throughout the Spermonde Archipelago in Indonesia. Morphological and molecular techniques were used to identify the sponge host (28S ribosomal DNA) and their Symbiodiniaceae symbionts (ITS2). Seven Clionaidae species were found, of which four species contained Symbiodiniaceae. Cliona aff. orientalis , Cliona thomasi and Spheciospongia maeandrina were host to Cladocopium , while Spheciospongia digitata contained Durusdinium and Freudenthalidium . In the remaining species: Cliona sp., Cliona utricularis and Spheciospongia trincomaliensis no evidence of the presence of Symbiodiniaceae was found. Our results provide the first record of Symbiodiniaceae in the sponge genus Spheciospongia . Additionally, we provide the first findings of Freudenthalidium and first molecular evidence of Durusdinium in bioeroding sponges. Our results indicate coevolution between Spheciospongia digitata , Spheciospongia maeandrina and their symbionts. We discuss that the ersity of Symbiodiniaceae within bioeroding sponges is likely far greater than currently reported in literature. Considering the threat bioeroding sponges can pose to the health of coral reefs, it is crucial to understand Symbiodiniaceae ersity within Clionaidae and their effect on the functioning of Clionaidae species. We propose that the identity of the symbiont species is mostly related to the host species, but we did observe a potential case of environmental adaptation related to environmental stressors.
Publisher: Universität Kassel
Date: 2020
Publisher: Elsevier BV
Date: 05-2022
DOI: 10.1016/J.JENVMAN.2022.114692
Abstract: The extent of seagrass areas and their associated ecosystem functions and services have been declining due to many factors. Seagrass restoration is important to mitigate such declines. Seagrass restoration using seeds can be a viable method due to the high seed availability of some seagrass species and could enhance seagrass resilience to climate change stress. However, this method sometimes has low success rates due to high seed predation and seeds being washed away by wave action or substrate movement. The research was conducted to compare the settlement of Enhalus acoroides seeds and the establishment of seedlings on different sediment types (fine sand, coarse sand, and hard substrate with rubble) combined with different wave exposure levels (high and moderate). This is the first study to observe seed survival and seedling establishment of the tropical seagrass E. acoroides in the wild. On average, 64% of seeds dispersed on fine sand substrate at a moderate exposure site survived and developed into established seedlings by the end of the 40 days observation period, but the survival of seeds dispersed on coarse sand at high exposure and hard substrate at moderate exposure only remained above 50% for up to 3 days, and had declined to 2% and 1.4%, respectively, by day 40. Six years later, surviving E. acoroides s le from the coarse sand and hard substrate both had well-developed rhizomes but fewer roots than the plant from the fine sand site, these rhizome and roots characteristics were likely adaptations to increase anchoring capacity in the specific site. The results indicate that Enhalus seed settlement and seedling establishment can readily occur at sites with fine sand substrate and lower wave exposure however, additional measures may be required at more exposed sites with mobile or hard substrates until seedlings become established.
Publisher: Informa UK Limited
Date: 12-07-2007
Publisher: Springer Science and Business Media LLC
Date: 03-08-2014
Publisher: IOP Publishing
Date: 09-04-2019
Publisher: UNS Solo
Date: 29-10-2019
Abstract: Abstract. Ambo-Rappe R, La Nafie YA, Syafiuddin, Limbong SR, Asriani N, Handayani NT, Lisdayanti E. 2019. Short Communication: Restoration of seagrass Enhalus acoroides using a combination of generative and vegetative techniques. Bio ersitas 20: 3358-3363. Seagrass areas have been declining in extent worldwide, with associated loss in seagrass ecosystem functions and services. Seagrass restoration is important to mitigate, halt and reverse such declines and their consequences. Generative propagation has benefits in terms of genetic bio ersity, however, survival of seagrass seedlings has often been poor especially in high energy environments. Terrestrial restoration often uses shade trees to protect vulnerable seedlings. This study aimed to evaluate the feasibility of a similar approach in the marine environment, using adult plants to protect seedlings of the tropical seagrass Enhalus acoroides (L.f.) Royle. Enhalus seeds taken from a donor bed were germinated and grown into seedlings, then planted in a location with high hydrodynamic exposure at three different densities (high, medium, and low). Adult Enhalus transplants were co-planted to provide three levels of protection: fifty (high), ten (medium), and none (no protection). Results showed that high-density seedling co-planting with high protection from adult transplants had significantly (p 0.05) higher six-month survival rate compared to the other treatments. Our results indicate that, even in high energy environments, co-planting seedlings with adult transplants may combine the advantages of generative and vegetative propagation methods, promoting greater short-term effectiveness in terms of seedlings survival and growth in the restored seagrass meadows.
Publisher: IOP Publishing
Date: 09-04-2019
Publisher: IOP Publishing
Date: 09-04-2019
Publisher: Elsevier
Date: 2018
Publisher: IOP Publishing
Date: 09-2020
DOI: 10.1088/1755-1315/564/1/012065
Abstract: In 2014, the project preparation for Coral Reef Management (Coremap) CTI claim that mangrove at Selayar was approximately 676.7 hectares distributed at 15 villages. Tambolongan at Bontosikuyu district was the largest area of about 132 hectares. These values extracted using Landsat imageries based on visual and composite image classification. Since Sentinel 2A launched in 2015, the use of this satellite imagery has spread widely in ecosystem monitoring due to its higher spatial, spectral and temporal resolution and mostly because it is free to access. Nevertheless, field s ling is still needed to crosscheck the final result. Since 2015 three mangrove locations at Selayar island monitored annually. By 2018, two new locations at Pasi island added. In 2019 three sites added at two different islands, so now a total nine mangrove station covering the whole Selayar islands. Nine species of mangroves were found by the end of 2019 monitoring, which are Avicennia alba, A. officinalis, A. marina, Bruguiera gymnorrhiza, Rhizophora apiculata, R. mucronata, R. stylosa, Cerios tagal, and Sonneratia alba. Spectral image characterization by using 12 bands of Sentinel 2A shows that most of these mangroves had peak reflectances at 783 and 865 nanometer, and the highest reflectance are lower than 0.45. These findings may contribute to better spatial identifications for mangrove monitoring and also the consequences to the revision of previous information extracted from Landsat imageries.
Publisher: Elsevier BV
Date: 09-2018
DOI: 10.1016/J.SCITOTENV.2018.03.315
Abstract: Indonesia's marine ecosystems form a fundamental part of the world's natural heritage, representing a global maxima of marine bio ersity and supporting the world's second largest production of seafood. Seagrasses are a key part of that support. In the absence of empirical data we present evidence from expert opinions as to the state of Indonesia's seagrass ecosystems, their support for ecosystem services, with a focus on fisheries, and the damaging activities that threaten their existence. We further draw on expert opinion to elicit potential solutions to prevent further loss. Seagrasses and the ecosystem services they support across the Indonesian archipelago are in a critical state of decline. Declining seagrass health is the result of shifting environmental conditions due largely to coastal development, land reclamation, and deforestation, as well as seaweed farming, overfishing and garbage dumping. In particular, we also describe the declining state of the fisheries resources that seagrass meadows support. The perilous state of Indonesia's seagrasses will compromise their resilience to climate change and result in a loss of their high ecosystem service value. Community supported management initiatives provide one mechanism for seagrass protection. Exemplars highlight the need for increased local level autonomy for the management of marine resources, opening up opportunities for incentive type conservation schemes.
Publisher: Wiley
Date: 20-07-2020
DOI: 10.1111/JFB.14440
Publisher: Informa UK Limited
Date: 23-03-2017
Publisher: IOP Publishing
Date: 11-2019
DOI: 10.1088/1755-1315/370/1/012022
Abstract: Seagrasses are marine flowering plants, which form extensive meadows mostly in shallow water marine environments. They provide a wide range of ecosystem services, which can be grouped into four broad categories: provisioning (e.g. food production) regulating (e.g. controlling climate and disease) supporting (e.g. nutrient cycles and oxygenation) and cultural (e.g. spiritual and recreational benefits). These services directly or indirectly benefit humans. Seagrass have contributed to the fulfilment of human needs for a very long time, before the term “ecosystem services” was coined. However, there is a lack of knowledge regarding public awareness on seagrasses and the benefits they provide. In this study, we conducted a workshop in Selayar Archipelago, South Sulawesi, Indonesia, an area with extensive seagrass meadows. The workshop focussed on seagrass meadows in the context of coastal community livelihood-related activities. The 50 workshop participants came from a variety of backgrounds, mostly related to the marine and fisheries sector (e.g. fishermen, vocational high school students, conservation agency staff, district government fisheries officers, and fisheries extension staff). The workshop revealed that many marine and fisheries stakeholders have a high level of awareness regarding seagrasses and the basic ecosystem services they provide. Some key points were identified from the workshop: 1) seagrasses were recognised as a resource 2) the most and least frequently mentioned ecosystem service types mentioned were “provisioning” and “cultural”, respectively 3) threats to seagrass meadows were identified and practical recommendations to minimize the threats were formulated.
Publisher: IOP Publishing
Date: 20-02-2019
Publisher: IOP Publishing
Date: 09-2020
DOI: 10.1088/1755-1315/564/1/012019
Abstract: The Banggai cardinalfish Pterapogon kauderni is an endangered endemic species with an exceptionally small native distribution and an unusual life history. A paternal mouthbrooder with direct development, symbiosis with benthic organisms (referred to as microhabitat), is crucial to its survival. This is especially so for postflexion larvae (recruits), after their release from the male parent’s buccal cavity. Microhabitat preference in P. kauderni has been studied empirically based on a survey of wild populations. This study adopted an ex-situ experimental approach to P. kauderni microhabitat preference using two well established behavioural trial methods: choice flume and choice tank. The experimental animals were sourced from the introduced P. kauderni population in Palu Bay, Central Sulawesi, Indonesia. The choice flume method was applied at the Central Sulawesi Marine and Fisheries Service Hatchery in Mamboro, Palu, with microhabitats Diadema setosum and D. savignyi . The choice box method was applied at the Universitas Hasanuddin Centre for Research and Development in Makassar, South Sulawesi, Indonesia, with microhabitats Heteractis crispa , Entacmaea quadricolor , D. savignyi and D. setosum . The results indicate the most to least preferred preference hierarchy of D. savignyi , D. setosum , H. crispa , E. quadricolor . While the preference for the sea anemone H. crispa compared to E. quadricolor is consonant with empirical in situ studies on P. kauderni , the observed preference for D. savignyi over D. setosum was unexpected, and points to the need for further research. Observations made during the trials also raise the possibility that imprinting may occur and influence subsequent microhabitat preference.
Publisher: Frontiers Media SA
Date: 15-05-2020
Publisher: IOP Publishing
Date: 09-04-2019
Publisher: IOP Publishing
Date: 09-2020
DOI: 10.1088/1755-1315/564/1/012017
Abstract: Seagrass meadows are among the most productive ecosystems on earth and are of great importance to support an abundance and erse fish assemblages that form the basis for artisanal fisheries, especially in the tropics. Fisheries are vital in maintaining food security, and therefore the ecosystems that support these fisheries are also essential. Seagrass ecosystems contribute to fishery productivity, and seagrass fisheries are especially common in the Indo-Pacific region, where seagrass beds and their associated fauna are heavily exploited. However, these fisheries remain largely undocumented. Within the Indo-Pacific region, Indonesia contributes significantly to seagrass bio ersity and global seagrass extent. Seagrass fisheries undoubtedly exist in Indonesia, but publications on this topic are rare. Therefore, there is a need to highlight the extent, importance, and status of fisheries exploitation in the seagrass meadows of Indonesia. The aims of this study were to determine the importance of seagrass meadows in supporting fisheries productivity and examining the variability of seagrass fisheries in Indonesia. A literature search of published data on fisheries activities in seagrass meadows in Indonesia was conducted from March-May 2020. Google Scholar database was searched using the most specific keywords in English and Indonesian, for ex le, “seagrass” AND ”fisheries” AND ”Indonesia”, “seagrass fisheries” AND ”Indonesia”, “Perikanan Skala Kecil” DAN “Padang Lamun”, in the title, abstract or keywords, in order to obtain information from the few papers on seagrass fisheries in Indonesia published in English (international journals) and Indonesian. Additional data on seagrass fisheries and the fishing methods/gears used were collected by interviewing people who live or work in areas with few or no published data to gain a broader picture of seagrass fisheries in Indonesia. It was found that seagrass fisheries occur in almost all nearshore seagrass areas in Indonesia, including around many small islands. Many fishing gears are used in these fisheries, the most common being gill nets, traps, and gleaning (directly picking up fauna from the seagrass beds using bare hands or very simple tools). Therefore, from a socioeconomic perspective, seagrass beds are extremely important for the livelihoods of coastal and island communities in Indonesia.
No related grants have been discovered for Rohani Ambo-Rappe.