Jih-Terng Wang | Tajen University (original) (raw)

Papers by Jih-Terng Wang

Marine Pollution Bulletin, 2012

In July 2001, the National Museum of Marine Biology and Aquarium, co-sponsored by the Kenting Nat... more In July 2001, the National Museum of Marine Biology and Aquarium, co-sponsored by the Kenting National Park Headquarters and Taiwan&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;s National Science Council, launched a Long-Term Ecological Research (LTER) program to monitor anthropogenic impacts on the ecosystems of southern Taiwan, specifically the coral reefs of Kenting National Park (KNP), which are facing an increasing amount of anthropogenic pressure. We found that the seawater of the reef flats along Nanwan Bay, Taiwan&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;s southernmost embayment, was polluted by sewage discharge at certain monitoring stations. Furthermore, the consequently higher nutrient and suspended sediment levels had led to algal blooms and sediment smothering of shallow water corals at some sampling sites. Finally, our results show that, in addition to this influx of anthropogenically-derived sewage, increasing tourist numbers are correlated with decreasing shallow water coral cover, highlighting the urgency of a more proactive management plan for KNP&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;s coral reefs.

Marine and Freshwater Research, 2014

Algal bloom is a major concern worldwide. In this study, we characterised the physical and bioche... more Algal bloom is a major concern worldwide. In this study, we characterised the physical and biochemical parameters during an algal bloom event in a coastal lagoon in an attempt to predict local blooms in the future. Results showed that the highest concentrations of dissolved inorganic phosphorus (DIP), chlorophyll a (chl a) and phytoplankton abundance were found in the inner area, whereas the highest dissolved inorganic nitrogen (DIN) concentration occurred near the inlet-outlet channel. Chl a was correlated with DIP, and there was a significant exponential relationship between chl a and the nitrogen to phosphorus ratio (N/P ratio) across all sampling stations and times. A higher proportion of the variation in chl a was explained by the N/P ratio than either DIP or DIN. We found that a N/P ratio <2.38 will likely trigger an algal bloom (chl a ≥ 10 µgL–1) in the lagoon. Our results suggest that the N/P ratio could be used as an expedient and reliable measure of the potential eutrop...

Aposymbiotic I. palifera with feeding was treated ... more Aposymbiotic I. palifera with feeding was treated by supplementing animals with a nutrient cocktail containing glycerol, vitamins, and a host mimic free amino acid mixture as described in the [text/<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0046406#pone-0046406-t001" target="_blank">Table 1</a>??]. Data represent the mean±S.E.</p

PeerJ, 2022

In massive bleaching events (losing symbiotic algae from corals), more sensitive corals are bleac... more In massive bleaching events (losing symbiotic algae from corals), more sensitive corals are bleached earlier than other corals. To perform a comparison of bleaching susceptibility within and across coral species, a simple quantitative method is required. Accordingly, we present a laboratory-based method for comparing the bleaching susceptibility of various coral species by using a standardized image analysis protocol. Coral fragments were sampled from the colonies of five species selected from Kenting, southern Taiwan, and maintained in the same aquarium tank with circulating seawater; 2 seawater temperature regimes were used (i.e., fast-heating program (FHP), with a heating rate of 1 °C per day; and slow-heating program (SHP), with a heating rate of 1 °C per 3 days). Each coral fragment was photographed periodically, and the colored images were subsequently converted to grayscale images and then digitally analyzed to determine the standardized grayscale values (G0) by comparing wit...

Zoological studies, 2018

Kuo-Wei Kao, Shashank Keshavmurthy, Cing-Hsin Tsao, Jih-Terng Wang, and Chaolun Allen Chen (2018)... more Kuo-Wei Kao, Shashank Keshavmurthy, Cing-Hsin Tsao, Jih-Terng Wang, and Chaolun Allen Chen (2018) With climate change, global average sea surface temperatures are expected to increase by 1.0-3.7°C by the end of this century. Even a 1.0°C increase in seawater temperature from local long-term summer maxima lasting for weeks to months results in bleaching and/or mortality in reef-building corals. Studies on coral resistance mechanisms have proposed a correlation between shuffling of different Symbiodiniaceae genera (changing the dominant Symbiodiniaceae genera) and putative thermal tolerance in corals. Although it was suggested that some corals can increase their tolerance by 1.0-1.5°C through shuffling to thermally tolerant Durusdinium trenchii (formerly D1a), the effects of accumulated thermal stress due to prolonged high temperatures on the survival of corals that have shuffled have not been investigated. We show herein that prolonged exposure to high temperature (> 10.43-degree ...

Zoological Studies, 2012

Activation Energy for Inhibiting Photosystem II Activity Jih-Terng Wang1,*, Pei-Jie Meng2,3, Yi-Y... more Activation Energy for Inhibiting Photosystem II Activity Jih-Terng Wang1,*, Pei-Jie Meng2,3, Yi-Yun Chen1, and Chaolun Allen Chen4,5,6 1Graduate Institute of Biotechnology, Tajen Univ., Pingtung 907, Taiwan 2National Museum of Marine Biology and Aquarium, Checheng, Pingtung 944, Taiwan 3Institute of Marine Biodiversity and Evolution, National Dong Hwa Univ., Checheng, Pingtung 944, Taiwan 4Institute of Oceanography, National Taiwan Univ., Taipei 108, Taiwan 5Biodiversity Research Center, Academia Sinica, Nangang, Taipei 115, Taiwan 6Taiwan International Graduate Program (TIGP)Biodiversity, Academia Sinica, Nangang, Taipei 115, Tawian

Acclimatization through Symbiodinium shuffling is one of potential mechanisms in reef-building co... more Acclimatization through Symbiodinium shuffling is one of potential mechanisms in reef-building corals to survive environmental stress. In our previous study, the catch bowl coral Isopora palifera in Tantzei Bay (TZB), Nanwan, Kenting National Park (KNP), southern Taiwan was demonstrated to shuffle thermal-tolerant Symbiodinium D1a and thermal-sensitive Symbiodinium C3 in response to seasonal variations in sea surface temperatures (SSTs) in 2000 and 2001. In this study, we reexamined the temporal dynamics of the Symbiodinium community of I. palifera in TZB in 2006-2009. In addition, spatial variations in Symbiodinium communities in I. palifera were also examined at 6 other sites of Nanwan, KNP in 2009, including a site located at a nuclear power plant outlet (NPP-OL) in southern Taiwan with a yearly mean SST 0.6-1.5 degrees C higher compared to the other sites. Phylotyping and DNA sequence analyses of Symbiodinium ribosomal 28S and ITS2 markers showed that I. palifera colonies at TZB...

PeerJ, 2020

This study monitored symbiont communities bi-monthly in native coral cores used in a reciprocal t... more This study monitored symbiont communities bi-monthly in native coral cores used in a reciprocal transplantation of the coral Platygyra verweyi over two years (2014–2016) and samples of mother colonies from three locations with variable thermal regimes; our results show that associating with multiple Symbiodiniaceae genera (Cladocopium spp. and Durusdinium spp.) is not a prerequisite for symbiont shuffling. Platygyra verweyi associates with certain Symbiodiniaceae genera based on location. Results of quantitative real-time PCR indicated small-scale temporal changes in Symbiodiniaceae genera compositions from 2014 to 2016; however, these changes were not enough to invoke shuffling or switching, despite degree heating weeks exceeding 6 °C-weeks in 2014 and 4 °C-weeks in 2015, which usually resulted in substantial coral bleaching. Microsatellite analysis of the P. verweyi host showed no genetic differences among the study locations. Our results suggest that P. verweyi undergoes long-ter...

Journal of Marine Science and Engineering, 2019

Coral reefs in the Anthropocene are being subjected to unprecedented levels of stressors, includi... more Coral reefs in the Anthropocene are being subjected to unprecedented levels of stressors, including local disturbances—such as overfishing, habitat destruction, and pollution—and large-scale destruction related to the global impacts of climate change—such as typhoons and coral bleaching. Thus, the future of corals and coral reefs in any given community and coral-Symbiodiniaceae associations over time will depend on their level of resilience, from individual corals to entire ecosystems. Herein we review the environmental settings and long-term ecological research on coral reefs, based on both coral resilience and space, in Kenting National Park (KNP), Hengchun Peninsula, southern Taiwan, wherein fringing reefs have developed along the coast of both capes and a semi-closed bay, known as Nanwan, within the peninsula. These reefs are influenced by a branch of Kuroshio Current, the monsoon-induced South China Sea Surface Current, and a tide-induced upwelling that not only shapes coral co...

PeerJ, 2017

To understand the mechanism of photosynthetic inhibition and generation of reactive oxygen specie... more To understand the mechanism of photosynthetic inhibition and generation of reactive oxygen species (ROS) in Symbiodinium types under stress, chemicals such as dichlorophenyl dimethylurea (DCMU) are widely used. Moreover, DCMU and recently menthol were used to generate aposymbiotic cnidarian hosts. While the effects of DCMU on Symbiodinium cells have been extensively studied, no studies have shown the mechanism behind menthol-induced coral bleaching. Moreover, no study has compared the effects of DCMU and menthol treatments on photosystem II (PSII) activity and generation of ROS in different Symbiodinium types. In this study, we utilized five freshly isolated Symbiodinium types (S. minutum (B1), S. goreaui (C1), C3, C15, and S. trenchii (D1a)) to compare the effects of DCMU and menthol treatments. Symbiodinium cells were exposed to DCMU and menthol at different concentrations for 4 h. Results showed that values of the 50% inhibitory concentration (IC50) for PSII inhibition were 0.72∼...

Plant Physiology, 1997

Exogenous concentrations of 10 [mu]M to 1 mM of the nonprotein amino acid taurine stimulated phot... more Exogenous concentrations of 10 [mu]M to 1 mM of the nonprotein amino acid taurine stimulated photosynthate release from the dinoflagellate alga Symbiodinium, which had been freshly isolated from the sea anemone Aiptasia pulchella. Photosynthate release, as induced by taurine and animal extract, was metabolically equivalent at both concentrations in that they (a) stimulated photosynthate release to the same extent and (b) induced the selective release of photosynthetically derived organic acids. A complex mixture of amino acids at 75 mM also promoted photosynthate release, but the release rate was reduced by 34% after the omission of taurine (3 mM) from the mixture, suggesting that much of the effect of amino acids was largely attributable to taurine. Exogenous 14C-labeled taurine was taken up by the cells, and more than 95% of the internalized 14C was recovered as taurine, indicating that taurine-induced photosynthate release was not dependent on taurine metabolism. Both taurine upt...

International journal of systematic and evolutionary microbiology, Jan 15, 2016

A bacterial strain, designated CL-22T, was isolated from an encrusting pore coral Montipora aequi... more A bacterial strain, designated CL-22T, was isolated from an encrusting pore coral Montipora aequituberculata, collected off coast of Southern Taiwan. Its taxonomic position was investigated through a polyphasic approach. Cells of strain CL-22T were Gram-staining-negative, aerobic, motile by means of a single polar flagellum, rod-shaped and forming yellow colonies. Optimal growth occurred at 30 °C, pH 6.5-7 and 2 % NaCl. A neighbour-joining phylogenetic tree based on 16S rRNA gene sequences showed that strain CL-22T fell into the clade comprising the type strains of species of the genus Thalassotalea. Strain CL-22T exhibited 16S rRNA gene sequence similarity values of 94.7-97.1 % to the type strains of species of the genus Thalassotalea. The major fatty acids (>10 %) of strain CL-22T were summed feature 3 (C16:17c and/or C16:16c) and C16:0. The predominant isoprenoid quinone was Q-8. The major polar lipids were phosphatidylethanolamine and phosphatidylglycerol. Genomic DNA G+C c...

Zoological studies

Morakot was the deadliest typhoon to impact Taiwan in recorded history. It attained a peak intens... more Morakot was the deadliest typhoon to impact Taiwan in recorded history. It attained a peak intensity with winds of 150 km/h on Aug. 7-9, 2009, which is equivalent to a category 1 hurricane on the Saffir-Simpson Hurricane Scale. The storm produced copious amounts of rainfall, peaking at 2777 mm, surpassing the previous record of 1736 mm set by Typhoon Herb in 1996. The extreme amount of rain and strong winds of typhoon Morakot not only triggered enormous mudslides and severe flooding, but also created strong waves that damaged reefs of southern Taiwan. The mean live coral coverage at Siangjiao Bay (SJB; 21°55'432"N, 120°49'788"E), a marine protected area (MPA) in the Kenting National Park (KNP) in southern Taiwan, was reduced from 58.80% to 18.54% (based on video-transect surveys) before and after the typhoon hit these reefs. The SJB coral communities were in fair to good condition with a mean coral coverage of > 45% from 1987 to 1997 (Dai et al. 1998 1999), and ...