scholarly journals THE POTENTIALLY TOXIC BENTHIC DINOFLAGELLATES ON MACROALGAE AT THE REEF FLAT OF SERIBU ISLANDS, NORTH JAKARTA - INDONESIA

2018 ◽  
Vol 33 (1) ◽  
pp. 91-94 ◽  
Author(s):  
Riani Widiarti ◽  
Murtiningsih ◽  
Suwarti ◽  
Ahmad Mutaqin ◽  
Gud Elina Kurnia
Keyword(s):  
Coral Reef ◽  
Environmental Factors ◽  
Human Activities ◽  
National Park ◽  
Reef Flat ◽  
Brown Macroalgae ◽  
Ciguatera Fish Poisoning ◽  
Benthic Dinoflagellates ◽  
Fish Poisoning ◽  
Gambierdiscus Toxicus

The Ciguatera Fish Poisoning (CFP) causing microorganisms were observed at the reef flat of Penjaliran Barat Islands and Pramuka Islands District, Seribu Island National Park, North Jakarta, Indonesia. Of the samples collected, four potentially toxic benthic dinoflagellates species were found, which are Gambierdiscus toxicus, Prorocentrum concavum, Prorocentrum lima, and Ostreopsis lenticularis. The dinoflagellates were found attached on the brown macroalgae Padina and Sargassum. Most of the benthic dinoflagellates from both locations were found in Pramuka Islands District, the inhabitated islands where human activities which could damage the coral reef areas were relatively high. Beside the macroalgae substrate preference of each dinoflagellate species, several environmental factors were also obtained in this research.

scholarly journals THE DISTRIBUTION OF TOXIC DINOFLAGELLATES ON SEA GRASS Enhalus acoroides AT PARI ISLAND, SERIBU ISLANDS

2012 ◽  
Vol 4 (2) ◽  
Author(s):  
Riani Widiarti ◽  
Fitrian Anggraini
Keyword(s):  
Reef Flat ◽  
Water Currents ◽  
Enhalus Acoroides ◽  
Ciguatera Fish Poisoning ◽  
Benthic Dinoflagellates ◽  
Fish Poisoning ◽  
Sea Grass ◽  
Toxic Dinoflagellates ◽  
Southern Side ◽  
Local Water

<p>Benthic dinoflagellates causing Ciguatera Fish Poisoning (CFP), could be found attached either on macroalgae or sea grasses. Research on density and distribution of benthic dinoflagellates on sea grass leaves was conducted in Pari Island waters, Seribu Islands, in April 2012. Research was carried out by collecting Enhalus acoroides leaves from each site, and put inside the plastic jars containing seawater. In order to separate the dinoflagellates species from the leaves, the plastic jars were shaken vigorously and the seawater filtered through a series of sieves (125μm and 20μm). The resulted residue was than observed using Sedgewick rafter cell under light microscope. Based on samples collected, eight benthic dinoflagellates were found, where five of them were potentially toxic. They were Prorocentrum concavum, P. lima, P. rhathymum, Ostreopsis lenticularis, and O. siamensis. The highest abundance was found in the reef flat on the southern side of the island (652 sel/cm2 seagrass leaf). Research showed that the density and distribution of toxic dinoflagellates on sea grass at Pari Island, Seribu Islands were more influenced by local water currents.</p><p>Keywords: benthic dinoflagellates, Ciguatera Fish Poisoning, Pari Island, seagrass</p>

scholarly journals THE DISTRIBUTION OF TOXIC DINOFLAGELLATES ON SEA GRASS Enhalus acoroides AT PARI ISLAND, SERIBU ISLANDS

2012 ◽  
Vol 4 (2) ◽  
Author(s):  
Riani Widiarti ◽  
Fitrian Anggraini
Keyword(s):  
Light Microscope ◽  
Reef Flat ◽  
Enhalus Acoroides ◽  
Ciguatera Fish Poisoning ◽  
Benthic Dinoflagellates ◽  
Fish Poisoning ◽  
Sea Grass ◽  
Toxic Dinoflagellates ◽  
Southern Side ◽  
Local Water

Benthic dinoflagellates causing Ciguatera Fish Poisoning (CFP), could be found attached either on macroalgae or sea grasses. Research on density and distribution of benthic dinoflagellates on sea grass leaves was conducted in Pari Island waters, Seribu Islands, in April 2012. Research was carried out by collecting Enhalus acoroides leaves from each site, and put inside the plastic jars containing seawater. In order to separate the dinoflagellates species from the leaves, the plastic jars were shaken vigorously and the seawater filtered through a series of sieves (125μm and 20μm). The resulted residue was than observed using Sedgewick rafter cell under light microscope. Based on samples collected, eight benthic dinoflagellates were found, where five of them were potentially toxic. They were Prorocentrum concavum, P. lima, P. rhathymum, Ostreopsis lenticularis, and O. siamensis. The highest abundance was found in the reef flat on the southern side of the island (652 sel/cm2 seagrass leaf). Research showed that the density and distribution of toxic dinoflagellates on sea grass at Pari Island, Seribu Islands were more influenced by local water currents.Keywords: benthic dinoflagellates, Ciguatera Fish Poisoning, Pari Island, seagrass

Origins of ciguatera fish poisoning: a new dinoflagellate, Gambierdiscus toxicus Adachi and Fukuyo, definitively involved as a causal agent

Toxicon ◽  
1980 ◽  
Vol 18 (2) ◽  
pp. 199-208 ◽  
Author(s):  
R. Bagnis ◽  
S. Chanteau ◽  
E. Chungue ◽  
J.M. Hurtel ◽  
T. Yasumoto ◽  
...  
Keyword(s):  
Causal Agent ◽  
Ciguatera Fish Poisoning ◽  
Fish Poisoning ◽  
Gambierdiscus Toxicus

scholarly journals First spatial distribution of potentially toxic benthic dinoflagellates in the Lesser Antilles (Guadeloupe and Martinique), Caribbean Sea

2019 ◽  
Vol 62 (4) ◽  
pp. 309-322 ◽  
Author(s):  
Aurélie Boisnoir ◽  
Pierre-Yves Pascal ◽  
Sophie Marro ◽  
Rodolphe Lémée
Keyword(s):  
Time Distribution ◽  
Caribbean Sea ◽  
Lesser Antilles ◽  
Substrate Preferences ◽  
Cell Counts ◽  
Ciguatera Fish Poisoning ◽  
Benthic Dinoflagellates ◽  
Fish Poisoning ◽  
Order Of Magnitude ◽  
First Time

Abstract For the first time, distribution and abundances (cells per gram of fresh macrophyte weight) of potentially toxic benthic dinoflagellates were studied around Guadeloupe (20 sites) and Martinique (six sites) islands (Lesser Antilles, Caribbean Sea). Benthic dinoflagellates were identified at the genus level and cell counts were undertaken on different host species of macroalgae and seagrasses. Abundance values of potentially toxic benthic dinoflagellates were one order of magnitude higher in Guadeloupe than in Martinique. The highest abundances of benthic dinoflagellates were found in the northern part of Guadeloupe Island, while their distribution was more homogeneous in Martinique. Ostreopsis was the dominant genus in Guadeloupe and Martinique. Regarding biotic substrate preferences, Phaeophyceae hosted the highest total abundances of benthic dinoflagellates on both islands, while the lowest total abundances were observed on Ulvophyceae in Guadeloupe and Florideophyceae in Martinique. The genus Gambierdiscus, known as the causal agent of the ciguatera fish poisoning (CFP), developed on all macrophyte groups on both islands without showing any preferences towards biotic substrates. The presence of this potentially harmful dinoflagellate genus in both islands could explain the existence of local cases of CFP in Guadeloupe and Martinique islands.

The prevalence of benthic dinoflagellates associated with ciguatera fish poisoning in the central Red Sea

Harmful Algae ◽  
2017 ◽  
Vol 68 ◽  
pp. 206-216 ◽  
Author(s):  
Daniela Catania ◽  
Mindy L. Richlen ◽  
Yim Ling Mak ◽  
Steve L. Morton ◽  
Elizabeth H. Laban ◽  
...  
Keyword(s):  
Red Sea ◽  
Ciguatera Fish Poisoning ◽  
Benthic Dinoflagellates ◽  
Fish Poisoning

THE COMPOSITION AND DISTRIBUTION OF BENTHIC FORAMINIFERA AT CORAL REEF ECOSYSTEM IN THOUSANDS ISLAND

2013 ◽  
Vol 5 (1) ◽  
Author(s):  
Lumban Nauli Lumban Toruan ◽  
Dedi Soedharma ◽  
Kresna Tri Dewi
Keyword(s):  
Coral Reef ◽  
Human Activities ◽  
Close Association ◽  
Mesh Size ◽  
Coral Reef Ecosystem ◽  
Composition Distribution ◽  
Benthic Foraminifers ◽  
High Nutrient ◽  
Binocular Microscope ◽  
Reef Ecosystem

Composition and distribution of foraminifers are affected by human activities and have close association with coral reef ecosystem. The aims of this research were to investigate the benthic foraminifers’ composition and distribution in sediment of coral reef ecosystem. Eleven stations of Karang Bongkok, Pramuka, and Onrust Island were observed in this study. The sediments were taken from surface substrate up to 2 cm under the substrate. Samples were washed on sieve with mesh size 0,063 mm, and then dried in oven with 50°C of temperature  for two hours. After separating from the sediment, the foraminifers were laid on foraminiferal slide and indentified using binocular microscope. The highest composition of symbiont-bearing foraminiferal assemblages which associated with reef ecosystem was in East Pramuka (78.17%) and the lowest was in South Onrust (21,83%). The opportunistic type had the highest composition in South Onrust (38.67%) and the lowest was in South Karang Bongkok. In west Pramuka had the highest composition of heterotrophic type (57.17%) and the lowest was in North Onrust (11.33%). Onrust Island was dominated by opportunistic type, indicating high nutrient. The highest amount of foraminifers’ taxa was found in Karang Bongkok with good coral reef coverage, while the lowest in Onrust facing with Jakarta Bay. Keywords: composition, distribution, benthic foraminifers, coral reef.

scholarly journals No Limits of Acceptable Change: A Proposed Research Framework for Informing Visitor Use Management in the Context of Cultural Resources

2021 ◽  
Vol 13 (1) ◽  
pp. 377
Author(s):  
Zachary D. Miller ◽  
Wayne Freimund ◽  
Stefani A. Crabtree ◽  
Ethan P. Ryan
Keyword(s):  
Decision Making ◽  
Protected Areas ◽  
Human Activities ◽  
National Park ◽  
Cultural Resources ◽  
Cultural Resource ◽  
Limits Of Acceptable Change ◽  
The Us ◽  
Visitor Use ◽  
Material Evidence

Cultural resources are commonly defined as resources that provide material evidence of past human activities. These resources are unique, as they are both finite and non-renewable. This provides a challenge for traditional visitor use management since these resources have no limits of acceptable change. However, with nearly every national park in the US containing cultural resources, coupled with ever-growing visitation, it is essential that managers of parks and protected areas have the ability to make science-informed decisions about cultural resources in the context of visitor use management. We propose a framework that can help provide context and exploration for these challenges. Drawing on previous literature, this framework includes risk-based approaches to decision making about visitor use; visitor cognitions related to cultural resources; emotions, mood, and affect related to cultural resource experiences; creating and evaluating interpretive programs; deviant visitor behaviors related to cultural resources; and co-management.

scholarly journals Spatiotemporal Heterogeneity of Ecological Policy Compromises Human Well-Being and Giant Panda Habitat Conservation in Giant Panda National Park

2021 ◽  
Vol 13 (9) ◽  
pp. 5013
Author(s):  
Dan Zhu ◽  
Degang Yang
Keyword(s):  
Environmental Factors ◽  
Socioeconomic Factors ◽  
National Park ◽  
Structural Equation ◽  
Giant Panda ◽  
Conservation Status ◽  
Well Being ◽  
Habitat Conservation ◽  
Spatiotemporal Heterogeneity ◽  
Panda Habitat

Identifying how policy, socioeconomic factors, and environmental factors influence changes in human well-being (HWB) and conservation efficiency is important for ecological management and sustainable development, especially in the Giant Panda National Park (GPNP). In this study, we systematically analyzed the differences in the conservation status of the giant panda habitat and changes in HWB over 15 years in the GPNP, which includes six mountain sites, Minshan (MS), Qionglai (QLS), Xiaoxiangling (XXL), Liangshan (LS), Qinling (QL), and Daxiangling (DXL). Redundancy analyses were used to determine the factors contributing (policy, socioeconomic factors, and environmental factors) to HWB and giant panda habitat conservation (HC). In addition, using a structural equation model (SEM), we investigated the relationship between the aforementioned three factors and their direct and indirect effects on HWB and HC. The results indicated that there was spatiotemporal heterogeneity of HWB and HC in our study area. There was an increasing number of plant species as well as an increased number of giant panda in GPNP. Generally, HWB in 2015 showed an increasing trend compared with that in 2000. Socioeconomic factors (23.6%) have the biggest influence on HWB and HC, followed by policy (23.2%) and environmental factors (19.4%). Conservation policy had a significantly positive influence on HWB (0.52), while it negatively influenced HC (−0.15). Socioeconomic factors significantly negatively influenced HWB (−0.38). The formulation and implementation of policies to promote economic development will contribute to the protection of giant pandas and their habitat. Our results provide insight on the conservation status of the giant panda habitat, HWB, and factors influencing them in different mountain sites in the GPNP, as well as having implications for the future management of the GPNP.

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