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Zooplankton ecology matters for paleoceanographic reconstructions

Zooplankton ecology matters for paleoceanographic reconstructions

The calcite shells of planktonic foraminifera, a type of zooplankton, are widely used to reconstruct past changes in oceanography and climate. One of the key assumptions made in such reconstructions is that the organisms have a fixed depth habitat in the water column through time, regardless of hydrographic changes. To [...]

 
Habitat change and its consequences on reef fish specialization in biogeographic transition zones

Habitat change and its consequences on reef fish specialization in biogeographic transition zones

IONTU’s Ph.D. candidate, Yuting Vicky Lin, and her advisor, Prof. Vianney Denis, published a study in the Journal of Biogeography on 16 July 2022. This study aimed to disentangle the effect of benthic habitats from the sea surface temperature on the distributions of reef fishes in a biogeographic transition zone. [...]

 
Improving the Predictability of Two Types of ENSO by the Characteristics of Extratropical Precursors

Improving the Predictability of Two Types of ENSO by the Characteristics of Extratropical Precursors

Yu-Heng Tseng El Niño-Southern Oscillation (ENSO) is the dominant interseasonal–interannual variability in the tropical Pacific and it exerts significant influence on weather and climate all over the world.

 
“Kuroshio paradox”-Coastal uplift supports more energy transferred to higher tropical levels in this oligotrophic Kuroshio ecosystem

“Kuroshio paradox”-Coastal uplift supports more energy transferred to higher tropical levels in this oligotrophic Kuroshio ecosystem

Led by Professor Chung-Chi Chen at the Department of Life Science, National Taiwan Normal University and Professor Chih-hao Hsieh at the Institute of Oceanography

 
Rapid Restratification of the Ocean Surface Boundary Layer during the Suppressed Phase of MJOs

Rapid Restratification of the Ocean Surface Boundary Layer during the Suppressed Phase of MJOs

Je-Yuan Hsu Between the spring and summer in the Southern Hemisphere, an intra-seasonal weather system: Madden-Julian Oscillation (MJO) propagates along the

 
Causal networks of phytoplankton diversity and biomass are modulated by environmental context

Causal networks of phytoplankton diversity and biomass are modulated by environmental context

Chun-Wei Chang and Chih-hao Hsieh Postdoctoral fellow, Dr. Chun-Wei Chang, from the National Center for Theoretical Sciences and Prof. Chih-hao Hsieh from the Institute of Oceanography

 
Observing Surface Waves in Subsurface Layer

Observing Surface Waves in Subsurface Layer

Since the 2000s, Argo floats supported by several countries have been used for monitoring the vertical structure of temperature and salinity in the worldwide ocean widely and regularly.

 
A GOOD STRATEGIST KNOWS HOW TO BEHAVE: THE TROPHIC PLASTICITY OF CORALS

A GOOD STRATEGIST KNOWS HOW TO BEHAVE: THE TROPHIC PLASTICITY OF CORALS

Yunli Eric Hsieh, Nicolas Sturaro, and Vianney Denis   Prof. Vianney Denis, his former postdoc Dr. Nicolas Sturaro and master student Yunli Hsieh at the Institute of Oceanography

 
Evaluation of the Impacts of Climate Change on Albacore Distribution in the South Pacific Ocean by Using Ensemble Forecast

Evaluation of the Impacts of Climate Change on Albacore Distribution in the South Pacific Ocean by Using Ensemble Forecast

Yi-Jay Chang, Jhen Hsu, Lai Po-Kai and cooperative colleagues   Tuna is one of the most popular fish species in the world. Taiwanese tuna longline fisheries operate in the three oceans

 
Carbon and nitrogen isoscape of particulate organic matter in the euphotic zone reflect the primary production and microbial activity in the East China Sea

Carbon and nitrogen isoscape of particulate organic matter in the euphotic zone reflect the primary production and microbial activity in the East China Sea

Pei-Chi Ho, Pei-Ling Wang The spatio-temporal variation of particulate organic matter (POM) in the euphotic zone at the shelf of the East China Sea (ECS) is affected by hydrological interactions and biological

 
Reconstructing large interaction networks from empirical time series data

Reconstructing large interaction networks from empirical time series data

Chun-Wei Chang and Chih-hao Hsieh Prof. Chih-hao Hsieh from the Institute of Oceanography and postdoc Dr. Chun-Wei Chang from the National Center for Theoretical Science

 
Exploring global pollution and cycling of mercury using ocean migratory fish

Exploring global pollution and cycling of mercury using ocean migratory fish

Profs. Chun-Mao Tseng and Jen-Chieh Shiao from the Institute of Oceanography, NTU, and the US cooperative colleagues worked together as

 
A joint atmosphere-ocean observation reveals upper ocean response to summertime atmospheric intraseasonal oscillations in the tropical South China Sea

A joint atmosphere-ocean observation reveals upper ocean response to summertime atmospheric intraseasonal oscillations in the tropical South China Sea

The South China Sea, which serves as an important maritime route between the Indian and Pacific Oceans, is characterized as a high biodiversity region in the world ocean

 
Learning from differences: Abiotic determinism of benthic communities in Northern Taiwan

Learning from differences: Abiotic determinism of benthic communities in Northern Taiwan

Wanchien Victoria Hsiao, Yuting Vicky Lin, Huei-Ting Lin, Vianney Denis* Prof. Vianney Denis and master student Wanchien Victoria Hsiao from the Institute of Oceanography, NTU, together with Ph.D. candidate Yuting Vicky lin and Prof. Huei-Ting lin

 
Hump-shaped relationship between aggregation tendency and body size within fish populations

Hump-shaped relationship between aggregation tendency and body size within fish populations

Ruo-Yu Pan, Ting-Chun Kuo and Chih-hao Hsieh Prof. Chih-hao Hsieh and master student Ruo-Yu Pan from the Institute of Oceanography, NTU, together with Prof. Ting-Chun Kuo from the NTOU

 
236U/238U analysis of femtogram 236U by MC-ICPMS

236U/238U analysis of femtogram 236U by MC-ICPMS

A frontier research lead by the assistant professor Huei-Ting (Tina) Lin of the Institute of Oceanography, NTU, collaborating with distinguished chair professor Chuan-Chou (River) Shen,

 
Stratigraphic Framework and Sediment Wave Fields Associated with Canyon-Levee Systems in the Huatung Basin Offshore Taiwan Orogen

Stratigraphic Framework and Sediment Wave Fields Associated with Canyon-Levee Systems in the Huatung Basin Offshore Taiwan Orogen

A research team, led by Prof. Ho-Han Hsu from the Institute of Oceanography, using newly compiled bathymetry, sub-bottom profiling and seismic data to illustrate seafloor morphology, submarine canyon networks and stratigraphic framework in Huatung Basin (HB) and an adjacent sub-basin offshore east Taiwan (Fig. 1). This work is published in [...]

 
Community assembly processes as a mechanistic explanation  of the predator-prey diversity relationship in marine microbes

Community assembly processes as a mechanistic explanation of the predator-prey diversity relationship in marine microbes

Feng-Hsun Chang and Chih-hao Hsieh   Postdoctoral researcher, Feng-Hsun Chang and Prof. Chih-hao Hsieh from the Institute of Oceanography, NTU, proposed a novel approach to examine how the predator and prey communities are assembled in order to understand how predator and prey diversity are often positively associated. This approach, using [...]

 
Precipitation and Patagonian ice sheet drive past marine productivity of the southern Humboldt Current

Precipitation and Patagonian ice sheet drive past marine productivity of the southern Humboldt Current

The Humboldt Current System is the world’s most productive eastern boundary upwelling system. It stretches along the long coast off Chile. Thanks to the abundant nutrients here, this region is characterized by high marine productivity

 
Influence of Anomalous Low-level Circulation on the Kuroshio in the Luzon Strait during ENSO

Influence of Anomalous Low-level Circulation on the Kuroshio in the Luzon Strait during ENSO

The variation of Kuroshio loop in the Luzon Strait is important for the momentum, heat, and salt budgets of the SCS basin. Regarding the ENSO effects on the Kuroshio in the Luzon Strait, previous studies primarily focused on the effects of basin-scale wind anomalies and remote effects from the tropics. [...]

 
Impacts of Saharan Mineral Dust on Air-Sea Interaction over North Atlantic Ocean Using a Fully Coupled Regional Model

Impacts of Saharan Mineral Dust on Air-Sea Interaction over North Atlantic Ocean Using a Fully Coupled Regional Model

The atmosphere and oceans act as a coupled system. They interact in various ways, including via ocean-sur-face wind stresses, downward radiation fluxes, and exchanges of surface heat/energy. Professor Yu-heng Tseng and his collaborators investigate how the common Sahara dust can change the atmosphere and ocean dynamical processes using a high-resolution [...]

 
Long-term warming destabilizes aquatic ecosystems through weakening biodiversity-mediated causal networks

Long-term warming destabilizes aquatic ecosystems through weakening biodiversity-mediated causal networks

Chun-Wei Chang and Chih-hao Hsieh   Prof. Chih-hao Hsieh from the Institute of Oceanography, NTU and postdoc Dr. Chun-Wei Chang from the National Center for Theoretical Science lead an international team to reveal how warming influenced ecosystem dynamics via weakening the system-level causal networks associated with biodiversity.

 
Lessons from a high-CO2 world: an ocean view from  ∼ 3 million years ago

Lessons from a high-CO2 world: an ocean view from  ∼ 3 million years ago

Dr. Sze Ling Ho from IONTU co-led a study involving an international team of scientists, including marine geologists (PlioVAR; https://pliovar.github.io/index.html) and paleoclimate

 
Life histories determine divergent population trends for fishes under climate warming

Life histories determine divergent population trends for fishes under climate warming

Hui-Yu Wang, Sheng-Feng Shen, Ying-Shiuan Chen, Yun-Kae Kiang, and Mikko Heino   Dr. Hui-Yu Wang (IO NTU), Dr. Sheng-Feng Shen (AS BRC), and Dr. Mikko Heino (UiB) conduct the first assessment of warming-induced effects on various types marine fishes in the Indo-Pacific. Their findings reveal that warming impacts are not [...]

 
Temporal variations of submarine groundwater discharge into a tide-dominated coastal wetland (Gaomei Wetland, Western Taiwan) indicated by radon and radium Isotopes

Temporal variations of submarine groundwater discharge into a tide-dominated coastal wetland (Gaomei Wetland, Western Taiwan) indicated by radon and radium Isotopes

Although not as obvious as surface runoffs, groundwater flowing across the seabed into the ocean, so-called Submarine Groundwater Discharge (SGD), indeed occurs in many coastal areas. SGD, comprising of terrestrial fresh groundwater flowing from the aquifers and seawater infiltrating through the permeable sediments, is regarded as a significant process of [...]

 
Impact of ENSO on the South China Sea during ENSO decaying periods (a new mesoscale perspective from the regional coupled model)

Impact of ENSO on the South China Sea during ENSO decaying periods (a new mesoscale perspective from the regional coupled model)

The South China Sea (SCS) is the largest marginal sea in the western North Pacific. Its surface thermal conditions greatly affect the weather and climate conditions in the sea and its adjacent landmass. Previous studies have suggested that the ocean dynamics in the SCS play a crucial role in local [...]

 
Discovery of numerous pingos and comet-shaped depressions offshore southwestern Taiwan

Discovery of numerous pingos and comet-shaped depressions offshore southwestern Taiwan

Folds and thrust faults developed in accretionary wedge off southwestern Taiwan may provide conduits for fluid migration from deep strata to seafloor as there are many seafloor seepage features formed in this area. High-resolution bathymetric data and backscatter images collected using an autonomous underwater vehicle (AUV) over three accretionary ridges [...]

 
Physical disturbances in submarine canyon impact biodiversity of deep-sea nematodes

Physical disturbances in submarine canyon impact biodiversity of deep-sea nematodes

Gaoping Submarine Canyon (GPSC) off southwestern Taiwan connecting to the Gaoping River receives extremely high sediment load, heavy seasonal precipitation, and high tectonic activity in the region. Moreover, the internal tide within the GPSC induces strong bottom currents resulting in sediment erosion and resuspension. To understand the effects of extreme [...]

 
Phytoplankton nutritional content, rather than primary production, critically limits marine zooplankton production

Phytoplankton nutritional content, rather than primary production, critically limits marine zooplankton production

Pei-Chi Ho and Chih-hao Hsieh   A study combining ecological stoichiometry and in situ zooplankton incubation experiments, led by Dr. Pei-Chi Ho and Prof. Chih-hao Hsieh in the IONTU

 
Archaeal membrane lipid-based paleothermometry for applications in polar oceans.

Archaeal membrane lipid-based paleothermometry for applications in polar oceans.

To disentangle anthropogenic from natural climate variability, it is essential to reconstruct past oceanic and atmospheric temperatures for comparison with the modern world.

 
Oceanography research in the 2nd KU-NTU Colloquium

Oceanography research in the 2nd KU-NTU Colloquium

The 2nd KU-NTU Colloquium is dedicated to promote academic collaboration for researchers between the KU and NTU. In the colloquium on June 15 2020, the Institute of Oceanography (IO) hosted two parallel sessions on oceanography sciences: physical oceanography and marine ecology. The theme for physical oceanography was “responses of shelf [...]

 
NTU oceanographer and international team discovered ongoing and future tropical diversity decline

NTU oceanographer and international team discovered ongoing and future tropical diversity decline

How can patterns in the marine biodiversity of the past help us to understand how it may change in the future? A recent research by Drs Moriaki Yasuhara

 
Truncated age structure and warming temperature drive marine fishes into uneven spatial distribution, weakening their sustainability

Truncated age structure and warming temperature drive marine fishes into uneven spatial distribution, weakening their sustainability

Jheng-Yu Wang, Ting-Chun Kuo, and Chih-hao Hsieh   Prof. Chih-hao Hsieh and his master student Jheng-Yu Wang from NTU Institute of Oceanography together with Prof. Ting-Chun Kuo from NTOU found that fishing-induced age

 
What the Kuroshio swifts Cape Eluanbi will bring on

What the Kuroshio swifts Cape Eluanbi will bring on

Topographic effects on flow often induce submesoscale and small‐scale processes (e.g., wake flow and barotropic instability) which may grow into submesoscale eddies.

 
Spatiotemporal Variations in Dissolved Elemental Mercury in the River-Dominated and Monsoon-Influenced East China Sea: Drivers, Budgets, and Implications.

Spatiotemporal Variations in Dissolved Elemental Mercury in the River-Dominated and Monsoon-Influenced East China Sea: Drivers, Budgets, and Implications.

Mercury (Hg) is a neurotoxic element that features a complex biogeochemical cycling. In particular, the in-situ produced dissolved elemental mercury in surface seawater

 
Deep sea floor observations of typhoon driven enhanced ocean turbulence

Deep sea floor observations of typhoon driven enhanced ocean turbulence

During June 2017 and April 2018, an array of 100-Hz sampling-rate geophysical broadband Ocean Bottom Seismometers (OBSs) and an oceanographic 0.5-Hz sampling-rate vertical

 
Enhancing the ENSO Predictability beyond the Spring Barrier

Enhancing the ENSO Predictability beyond the Spring Barrier

El Niño-Southern Oscillation (ENSO) is the dominant interseasonal–interannual variability in the tropical Pacific and it exerts significant influence on weather and climate all over the world.

 
Could the North Pacific Oscillation be modified by the initiation of the East Asian Winter Monsoon?

Could the North Pacific Oscillation be modified by the initiation of the East Asian Winter Monsoon?

The North Pacific Oscillation (NPO) is the second leading mode of winter sea level pressure anomalies over the North Pacific. It can significantly influence downstream weather

 
Response of the Kuroshio east of Taiwan to mesoscale eddies and upstream variations

Response of the Kuroshio east of Taiwan to mesoscale eddies and upstream variations

Two-years of data from an array of pressure-sensor equipped inverted echo sounders (PIESs) deployed across the Kuroshio east of Taiwan are analyzed in this study.

 
Water stratification affected the vertical beta diversity of bacterioplankton in the Kuroshio

Water stratification affected the vertical beta diversity of bacterioplankton in the Kuroshio

Wan-Hsuan Cheng and Chih-hao Hsieh A study on vertical variation of bacteria in the Kuroshio Current east of Taiwan across seasons, led by Ph.D. student Wan-Hsuan Cheng from Academia Sinica

 
Seafloor Biodiversity of Canada’s Three Oceans

Seafloor Biodiversity of Canada’s Three Oceans

Oceanography professor Dr. Chih-Lin Wei collaborates with a team of Canadian marine biologists to publish a large study, “Seafloor biodiversity of Canada’s three oceans: Patterns, hotspots and potential drivers,” in Diversity and Distributions, a leading journal in the field.

 
Body size, along with light intensity and nutrient supply, determines plankton stoichiometry

Body size, along with light intensity and nutrient supply, determines plankton stoichiometry

Pei-Chi Ho and Chih-hao Hsieh Institute of Oceanography, National Taiwan University   A study combining the observations in subtropical aquatic systems and theoretical modeling

 
On Baroclinic Instability over Continental Shelves: Testing the Utility of Eady-Type Models. Journal of Physical Oceanography

On Baroclinic Instability over Continental Shelves: Testing the Utility of Eady-Type Models. Journal of Physical Oceanography

The Eady model of baroclinic instability has served as a theoretical foundation for understanding the scale, growth rate, and structure of mid-latitude

 
Marine 3D seismic volumes from 2D seismic survey with large streamer feathering.

Marine 3D seismic volumes from 2D seismic survey with large streamer feathering.

Strong ocean current influences a marine seismic survey and forces the streamer off-course from the survey line. The sideway drift of the streamer results in that the reflection data are no longer distributed in common

 
Quantitative reconstruction of salinity history by otolith oxygen stable isotopes: An example of a euryhaline fish Lateolabrax japonicus

Quantitative reconstruction of salinity history by otolith oxygen stable isotopes: An example of a euryhaline fish Lateolabrax japonicus

Estuaries are important habitats for fishes and the understandings of habitat uses of fishes in the estuary can benefit the fishery management and species conservation. Several approaches can be used to study the habitat use of the fish. In this study, we analyze the oxygen isotope compositions (δ18Ootolith) in the [...]

 
Revisiting the data reduction of seafloor heat-flow measurement: The example of mapping hydrothermal venting site around Yonaguni Knoll IV in the South Okinawa Trough.

Revisiting the data reduction of seafloor heat-flow measurement: The example of mapping hydrothermal venting site around Yonaguni Knoll IV in the South Okinawa Trough.

The heat-flow research team of IONTU, established by Prof. Chuen-Tien Shyu, has devoted many years’ effort to develop the frontier, state of the art marine observation system for seafloor

 
Spatial and temporal variations of sediment metals in the Tuul River, Mongolia

Spatial and temporal variations of sediment metals in the Tuul River, Mongolia

Environmental Science and Pollution Research, in press https://doi.org/10.1007/s11356-019-06428-9 Mongolia has been a pristine environment without much pollution. Our objective is to study a section of the Tuul River to evaluate the present condition of this pristine environment. Sediment metal (Al, Fe, Mn, Cu, Zn, Pb, Ni, Cd, Hg, and Cr) [...]

 
OceanGliders: Boundary Ocean Observing Network (BOON)

OceanGliders: Boundary Ocean Observing Network (BOON)

The ocean is a crucial component of the global earth system, which affects the global/regional climate, weather, ecosystems, living resources and biodiversity. The ocean plays a major role in many human activities such as coastal protection, tourism, search and rescue

 
Seaglider observations revealed striking interleaving layers in the Kuroshio east of Taiwan

Seaglider observations revealed striking interleaving layers in the Kuroshio east of Taiwan

The underwater glider, a kind of unmanned underwater vehicle, has been used for ocean observations for more than ten years. It was not until 2015 the Ministry of Science

 
Resource availability affects temporal variation of phytoplankton size spectral slopes in the Kuroshio east of Taiwan

Resource availability affects temporal variation of phytoplankton size spectral slopes in the Kuroshio east of Taiwan

Fan-Sian Lin, Pei-Chi Ho & Chih-hao Hsieh Institute of Oceanography, National Taiwan University A study in the Kuroshio east of Taiwan led by master student Fan-Sian Lan, Dr. Pei-Chi Ho, Profs. Chih-hao Hsieh and Sen Jan at National Taiwan University, shows that the temporal variation of phytoplankton size spectral slops [...]