Ganmanee, Monthon

Preferred name

Ganmanee, Monthon

Main Affiliation

School of Agricultural Technology

monthon.ga@kmitl.ac.th

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Effects of different nitrogen, phosphorus, and iron concentrations and salinity on lipid production in newly isolated strain of the tropical green microalga, Scenedesmus dimorphus KMITL
(2013-06-01)
Ruangsomboon, Suneerat
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Ganmanee, Monthon
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Choochote, Sakchai
The fatty acid composition, the effect of different concentrations of nitrogen (16.5-344 mg L-1), phosphorus (9-45 mg L-1), iron (9-45 mg L-1) and salinity levels (0-20 psu) on lipid production in the green microalga Scenedesmus dimorphus KMITL, a new strain isolated from a tropical country, Thailand, were studied. The alga was isolated from a freshwater fish pond, and cultured in Chlorella medium by varying one parameter at a time. The main fatty acid composition of this strain was C16-C18 (97.52 %) fatty acids. A high lipid content was observed in conditions of 16.5 mg L-1-N, or 22 mg L-1-P, or 45 mg L-1-Fe, or 5 psu salinity, which accumulated lipids to 20.3 ± 0.4, 19.4 ± 0.2, 24.7 ± 0.5, and 14.3 ± 0.2 % of algal biomass, respectively. Increasing lipid content and lipid productivity was noted when the alga was cultured under high iron concentration and high salinity, as well as under reduced phosphorus conditions, whereas nitrogen limitation only resulted in an increased lipid content. © 2012 Springer Science+Business Media Dordrecht.
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Coral skeletons as a recorder of metal pollution: Environmental monitoring in the gulf of Thailand
(2016-01-01)
Ohde, Shigeru
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Tanaka, Kentaro
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Ganmanee, Monthon
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McLeod, Cameron W.
Coral skeletons provide useful information on aquatic environments in which corals grew, and they also offer to use as recorders of pollution history from urbanized hinterlands to coral reefs. In order to monitor pollutant discharges from urban areas to the Gulf of Thailand since the 1980s, we collected Porites corals from Khang Khao Island about 50 km southeast of Bangkok in 1985, 1998, 2001 and 2008. The coral collection periods since the 1980s coincided with a series of laws enacted by the Thai government to curb environmental pollution. To determine the skeletal growth of the samples, oxygen isotopes (18O/16O as δ18O) in coral aragonite was measured by stable isotope mass spectrometry. A cyclical change in d18O is observed to record an annual change in seawater salinity, and then the coral growth rate is estimated at ~18 mm/year on average. Using the skeletal δ18O method, the coral chronology was established in the Gulf of Thailand. Next we used a recently developed laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS) method to assess the impact of metal pollution on coral skeletons taken from the Gulf of Thailand since the 1980s. The extent of anthropogenic contribution by riverine input to the gulf, including aerosol deposits, was assessed by comparing metal-calcium (Me/Ca) ratios of Khang Khao corals to those of Rukan-sho, a relatively unpolluted coral reef, Okinawa. In this comparison, high riverine inputs of Ba, V, Cd and Pb were observed from the Me/Ca values in the Thai coral samples. Since Ba concentration in seawater around Khang Khao Island largely depends on input from the rivers, especially the Chao Phraya River, the Ba/Ca ratios in Khang Khao corals reflect by the high concentrations of riverine input, showing cyclical variations like those of oxygen isotopes in the coral samples. The V/Ca ratios of Khang Khao corals showed a higher average value than that of the Rukan-sho coral, suggesting anthropogenic vanadium inputs due to fuel oil pollution in the Gulf since the late 1990s. Higher Cd/Ca ratios were observed in Khang Khao corals compared to that of Rukan-sho coral, indicating that the Cd concentration in the Gulf continuously suffered from anthropogenic input since 1983. The levels of Cd in the coral indicate a gradual decrease in the Gulf in the late 1990s, with a drastic drop in concentration from the 1980s. The historical variation in Pb/Ca ratios recorded in the coral skeletons suggests the Gulf of Thailand suffered from anthropogenic lead from 1985 to 2001. The Pb/Ca values recorded in Khang Khao Island corals suggest that the Gulf has been polluted by anthropogenic Pb from the early 1990s. After the use of leaded gasoline was banned in Thailand since 1995, the Pb/Ca in the Khang Khao Island corals showed a remarkable decrease, indicating that regulatory control has limited anthropogenic Pb inputs to the Gulf of Thailand. In conclusion, the coral archival record of the metals (V, Cd, Hg and Pb) strongly suggests the success of the environmental laws and regulations by the Thai Government introduced since the middle 1990s.
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Polymorphic microsatellite markers in the long-spined sea urchin Diadema setosum
(2014-12-01)
Wang, Mingling
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Li, Zhe
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Ganmanee, Monthon
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Xie, James Y.
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Urriago, Juan Diego
We developed twenty polymorphic microsatellite markers for the long-spined sea urchin Diadema setosum by screening microsatellite enriched library, and characterized their polymorphism using two populations of 45 individuals. The number of alleles per locus ranged from 4 to 17, and the observed and expected heterozygosity varied from 0.0714 to 1.000 and 0.6655 to 0.9321, respectively. Twelve loci conformed to the Hardy–Weinberg equilibrium after Bonferroni correction. These polymorphic microsatellite markers will facilitate studies of population genetics and connectivity in D. setosum.
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AmpuBase: A transcriptome database for eight species of apple snails (Gastropoda: Ampullariidae)
(2018-03-05)
Ip, Jack C.H.
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Mu, Huawei
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Chen, Qian
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Sun, Jin
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Ituarte, Santiago
Background: Gastropoda, with approximately 80,000 living species, is the largest class of Mollusca. Among gastropods, apple snails (family Ampullariidae) are globally distributed in tropical and subtropical freshwater ecosystems and many species are ecologically and economically important. Ampullariids exhibit various morphological and physiological adaptations to their respective habitats, which make them ideal candidates for studying adaptation, population divergence, speciation, and larger-scale patterns of diversity, including the biogeography of native and invasive populations. The limited availability of genomic data, however, hinders in-depth ecological and evolutionary studies of these non-model organisms. Results: Using Illumina Hiseq platforms, we sequenced 1220 million reads for seven species of apple snails. Together with the previously published RNA-Seq data of two apple snails, we conducted de novo transcriptome assembly of eight species that belong to five genera of Ampullariidae, two of which represent Old World lineages and the other three New World lineages. There were 20,730 to 35,828 unigenes with predicted open reading frames for the eight species, with N50 (shortest sequence length at 50% of the unigenes) ranging from 1320 to 1803 bp. 69.7% to 80.2% of these unigenes were functionally annotated by searching against NCBI's non-redundant, Gene Ontology database and the Kyoto Encyclopaedia of Genes and Genomes. With these data we developed AmpuBase, a relational database that features online BLAST functionality for DNA/protein sequences, keyword searching for unigenes/functional terms, and download functions for sequences and whole transcriptomes. Conclusions: In summary, we have generated comprehensive transcriptome data for multiple ampullariid genera and species, and created a publicly accessible database with a user-friendly interface to facilitate future basic and applied studies on ampullariids, and comparative molecular studies with other invertebrates.
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Geochemical fractions and modeling adsorption of heavy metals into contaminated river sediments in Japan and Thailand determined by sequential leaching technique using ICP-MS
(2019-09-01)
Wijaya, Anugrah Ricky
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Ohde, Shigeru
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Shinjo, Ryuichi
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Ganmanee, Monthon
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Cohen, Michael Dustin
In order to provide information on the chemical processes in sediment fractions and their adsorption models, we investigated the contaminated sediments of the Sumida River in Tokyo, Japan and the Chao Phraya River in Bangkok, Thailand. Samples were leached through a sequential leaching technique to perform metal concentration analysis for the sediment fraction assessment and then samples were tested for the model adsorption of the highest level of sediments contaminated by heavy metals using the isotherm Langmuir and Freundlich equations. Metal (Pb, Cd, Zn, As, Cu, Ca, Fe, and Mn) concentration in the leached solutions was analyzed by Inductively Coupled Plasma-Mass Spectrometry (ICP-MS). The pattern of geochemical fractions in both sediment samples showed the maxima leached levels of Cd (38.6 %), Ca (55.2%), and Mn (41.3%) in the soluble fraction; Pb (52.1%), and Zn (56.7%) in the reducible fraction; Cu (61.2%) in the oxidizable fraction; and As (47.1%) and Fe (55.9%) in the residual fraction. The total level fractions of Pb (62.6 ppm), Zn (240 ppm), As (27.2 ppm), Fe (16,636 ppm) and Mn (419 ppm) in the Chao Phraya River sediments were higher compared to those in the Sumida River, indicating the high anthropogenic effect in Bangkok. In the most contaminated sediments, the higher adsorption capacity of heavy metal concentrations was contributed by SiO<inf>2</inf>, CaCO<inf>3</inf>, and Al<inf>2</inf>O<inf>3</inf> determined by the X-ray diffraction and organic contents. The model of adsorption of Cd fitted to the linear form of Langmuir's equation with the correlation coefficients (r2 = 0.94), b (0.467) and k (7137), whereas Pb, Cu, Cr, and Zn conformed to the model of the Freundlich equation.
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Pleistocene events and present environmental factors have shaped the phylogeography of the intertidal limpet Cellana toreuma (Reeve, 1855) (Gastropoda: Nacellidae) in Southeast Asia and China
(2016-08-01)
Wang, Jie
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Ganmanee, Monthon
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Shau-Hwai, Aileen Tan
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Mujahid, Aazani
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Dong, Yun Wei
High levels of biodiversity and phylogeographic structure in marine species in Southeast Asia are strongly linked to Quaternary sea-level fluctuations and complex oceanographic conditions. Cellana toreuma is a common limpet on intertidal rocky shores and is widely distributed in the Western Pacific. Analyses of partial mitochondrial COI gene sequences from Southeast Asia, combined with previously published sequences from East Asia and Indonesia, revealed the existence of five well-supported clades with high genetic divergences (between 1.4 and 7.6%), namely the East Asia clade, the eastern Southeast Asia clade, the western Southeast Asia clade, the Pelabuan Ratu (Java) clade and the Ogasawara clade. The geographical distribution of the five clades is likely related to the history of glaciations and rapid postglacial population expansions. Analyses of pairwise Φ<inf>ST</inf> and hierarchical analysis of molecular variance shows significant population structure among collections in East and Southeast Asia. These results suggest that historical events have had strong effects on the phylogeographic structure of C. toreuma. In addition, present environmental factors, such as unsuitable habitats and ocean currents, have also affected the genetic footprints of past environments.
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Spatial Variation in Thermal Stress Experienced by Barnacles on Rocky Shores: The Interplay Between Geographic Variation, Tidal Cycles and Microhabitat Temperatures
(2020-07-29)
Wang, Hui Yu
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Tsang, Ling Ming
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Lima, Fernando P.
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Seabra, Rui
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Ganmanee, Monthon
Thermal stress is an important driver of species’ distribution in the intertidal zone and, with the forecasted increasing frequency of extreme high temperatures associated with climate change, is likely to play an even greater role in the future. To better understand the scales at which thermal stress impacts organisms, we used biomimetic temperature loggers (robobarnacles) to measure latitudinal variation in estimated barnacle body temperatures (Tetraclita spp.) and evaluated the influences of large, geographic, and smaller scale, microhabitat variation on temperatures experienced. Robobarnacles were deployed at nine sites along the West Pacific and South China Sea coast (five sites in Taiwan, three in Hong Kong and one in Thailand, spanning 13–25°N) from May to September 2013. Estimated body temperatures did not follow a latitudinal gradient; instead, they revealed a mosaic of hot (e.g., NE Taiwan and Thailand) and cooler sites (e.g., two sites in Hong Kong). The hot sites were characterized by frequent occurrences of “heat stress” events (estimated body temperatures ≥40°C for ≥2 h which would result in ≥50% Tetraclita entering coma). There was a correlation between hourly air temperatures and robo-temperatures, suggesting that air temperature together with solar radiation and thermal radiation re-emitted by the rocky substrate drove the observed spatial robo-temperature variation. Air temperature mediated by solar radiation and rock thermal radiation are, therefore, important contributors affecting the body temperature of sessile intertidal species in the tropical and subtropical W Pacific and South China Sea and can be a good predictor for body temperature and thermal stress of intertidal barnacles.
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Seasonal growth of the purple sea urchin heliocidaris crassispina revealed by sequential fluorochrome tagging
(2021-01-01)
Suarez, Juan Diego Urriago
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Wong, Jane C.Y.
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Lui, Gilbert
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Dumont, Clement P.
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Qiu, Jian Wen
Many studies have applied fluorochrome tagging to examine the growth of animals with calcified skeletons, but most of them have used only a single tag to determine the annual growth rate. We used sequential fluorochrome tagging to study the seasonal growth of the purple sea urchin Heliocidaris crassispina in Hong Kong waters from February 2012 to February 2013. Sea urchins ranging from 18.9 to 42.7 mm in test diameter had a yearly growth from 0.6 to 13.0 mm. During that year, the sea urchins grew from 0.6 to 5.0 mm in test diameter during the first six months, and from 0.4 to 10.2 mm in test diameter in the second six months. The seasonal differences in growth were confirmed using the von Bertalanffy model. The growth was clear for young sea urchins, especially for individuals less than 5 years old, but was not evident for sea urchins older than 7 years. The seasonal differences in growth were probably related to the reproductive cycle and the seasonal differences in environmental conditions. Our empirical results provide the first evidence of seasonal changes in growth for H. crassispina, demonstrating the usefulness of sequential fluorochrome tagging in studying the growth of sea urchins in the field. We also identify the problem of low recovery of tagged individuals and provide recommendations to improve the tagging procedure.
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Integrative taxonomy, larval biology and functional morphology of the little known gall-forming coral endoparasite Petrarca (Thecostraca: Ascothoracida)
(2023-07-01)
Kolbasov, Gregory A.
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Savchenko, Alexandra S.
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Yu, Meng Chen
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Tsao, Yao Feng
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Ganmanee, Monthon
Petrarca is an ascothoracidan endoparasite in scleratinian dendrophyllid corals. Petrarca can stimulate coral growth, forming a gall chamber to house itself inside the coral skeleton. The diversity, molecular phylogeny and feeding ecology of Petrarca are understudied. This is the first study of Petrarca to be based on light and scanning electron microscopy to document the fine-scale external and functional morphology of its trophi and other structures. A combined molecular and morphological approach revealed at least four closely related species of Petrarca, P. goanna, P. morula, Petrarca nozawai sp. nov. and Petrarca rubus sp. nov. in Turbinaria and Astreopora corals in Asia. Carapace shape and fine morphology, ultrastructure of the antennular aesthetasc, morphological characteristics of the trophi and the shape and size of the penis rami are diagnostic characters. Several morphological characters, which are all probably synapomorphies, have been proposed to distinguish the genus Petrarca from other Ascothoracida. Mouthparts morphology of Petrarca are developed for cutting and chewing, rather than for piercing and sucking as in many other Ascothoracida. The external surface of the carapace of Petrarca is ornamented with densely packed secretory papillae used putatively for the chemical dissolution of the substrate necessary for the formation of the gall chamber.
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Metal contents of Porites corals from Khang Khao Island, Gulf of Thailand: Anthropogenic input of river runoff into a coral reef from urbanized areas, Bangkok
(2013-08-20)
Tanaka, Kentaro
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Ohde, Shigeru
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Cohen, Michael D.
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Snidvongs, Anond
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Ganmanee, Monthon
Highlights:Laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) has been used to assess the impact of metal pollution on Porites skeletons taken from the Gulf of Thailand since the 1980s. The collection period coincided with a series of laws enacted by the Thai government to curb environmental pollution. The extent of metal pollution by riverine input, including aerosol deposits, was assessed by comparing the metal/Ca (Me/Ca) ratios in the Thai corals to the ratios of another colony of corals sampled from Rukan-sho, a relatively unpolluted coral reef located in Okinawa, Japan. In this comparison, high riverine inputs of Ba, V, Cd and Pb were observed in the Thai coral samples. Higher V/Ca ratios found in the Thai corals compared to the Rukan-sho coral suggest anthropogenic V inputs due to fuel oil pollution in the Gulf since the late 1990s. The levels of Cd in the coral suggest a gradual decrease in the Gulf in the late 1990s, with a drastic drop in concentration from the 1980s. The historical variation in Pb/Ca ratios recorded in the coral skeletons suggests that exposure to anthropogenic Pb was a result of discharge from urbanized areas from 1984 to 1998, which has been gradually reduced since Thailand prohibited the use of leaded gasoline in the late 1990s. © 2013 Elsevier Ltd.

Ganmanee, Monthon

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