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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 [...]

 
Acknowledging differences: number, characteristics, and distribution of marine benthic communities along Taiwan coast

Acknowledging differences: number, characteristics, and distribution of marine benthic communities along Taiwan coast

Our knowledge of the ability of coral reefs to face contemporary challenges disregards the wide variety of benthic communities (BCs) that could be associated with contrasted dynamics when facing stressors.

 
Exploration of the mesophotic coral ecosystems in Taiwan

Exploration of the mesophotic coral ecosystems in Taiwan

With the perspectives of using underwater robots to characterize mesophotic coral ecosystems in Taiwan, we are just back from our first field test of IONTU’s BlueROV2 (Blue Robotics Inc.) at Green Island (Ludao, Taiwan). Despite tough conditions at sea, we smoothly deployed our ROV down to -60 meters while analyzing [...]

 
Characterization of dissolved arsenics in the South China Sea

Characterization of dissolved arsenics in the South China Sea

Arsenic (As) is an extremely toxic element. But, this element has chemical similarity to that of Phosphorus, which P is an essential nutrient for all organisms. Indeed, arsenic in the ocean can be absorbed by microbes and then transferred to higher trophic

 
The Common Weak Biases of Pacific North Equatorial Countercurrent in Ocean Models Are Revealed

The Common Weak Biases of Pacific North Equatorial Countercurrent in Ocean Models Are Revealed

The Pacific North Equatorial Countercurrent (NECC) is a major upper-ocean zonal flow of the wind-driven circulation in the tropical Pacific, flowing eastward across the Pacific Ocean basin between 2°N and 10°N. The NECC transport is about 10-30 Sv eastward out of the warm pool region to the relatively cold eastern [...]

 
“Haste makes waste” in the evolution of typhoons

“Haste makes waste” in the evolution of typhoons

Two functional-improved data buoys, assembled and deployed by a research and technical team at National Taiwan University (NTU), survived from fierce wind and sea state of Super Typhoon Nepartak (Category 5) in the western North Pacific, and successfully recorded crucial air and sea variables within a few kilometers from the [...]

 
Steep redox gradient and biogeochemical cycling driven by deeply sourced fluids and gases in a terrestrial mud volcano

Steep redox gradient and biogeochemical cycling driven by deeply sourced fluids and gases in a terrestrial mud volcano

Pei-Ling Wang Microbial in subsurface environments would have exerted a profound impact on the cycling of carbon, nitrogen,

 
Species diversity of marine bacterioplankton communities is predictable due to macro-evolutionary constraints

Species diversity of marine bacterioplankton communities is predictable due to macro-evolutionary constraints

Hsiao-Pei Lu & Chih-hao Hsieh Institute of Oceanography, National Taiwan University A study in the East China Sea, led by Dr. Hsiao-Pei Lu and Prof. Chih-hao Hsieh, shows for the first time that diversity of marine bacteria community is strongly affected by macro-evolutionary constraints. This study is published (January, 2019) [...]

 
Biogeography of functional trait diversity in the Taiwanese reef fish fauna

Biogeography of functional trait diversity in the Taiwanese reef fish fauna

In Taiwan, the number of reef fish species decrease with latitude because of the changes in environmental conditions around the island. In this study published in January 2019 in Ecology and Evolution, a research team led by Dr. Vianney DENIS from the Institute of Oceanography (National Taiwan University) has investigated [...]

 
Formation and preservation of authigenic pyrite in the methane dominated environment

Formation and preservation of authigenic pyrite in the methane dominated environment

Dr. Lan-Feng Fan and Prof. Saulwood Lin from the Institute of Oceanography, explore authigenic pyrite formation and preservation in the methane dominated Environment.  This study,

 
Experiences gained from the 2018 IONTU-TUMSAT students exchange in Tokyo, Japan

Experiences gained from the 2018 IONTU-TUMSAT students exchange in Tokyo, Japan

Ching-Wei Wang and Chao-Yuan Yang The students exchange activity between IONTU and TUMSAT has been held for four years at both IONTU and TUMSAT. Under this mutual activity, we thank Professors Sen Jan, Yi-Jay Chang, Huei-Ting (Tina) Lin, and Vianney Denis for recommending us to visit TUMSAT in October 2018. [...]

 
Institute of Oceanography, National Taiwan University (IONTU) – Atmosphere and Ocean Research Institute, University of Tokyo (AORI) bilateral workshop

Institute of Oceanography, National Taiwan University (IONTU) – Atmosphere and Ocean Research Institute, University of Tokyo (AORI) bilateral workshop

IONTU-AORI bilateral workshop entitled “Northwestern Pacific Ocean Dynamics” was held on Dec 12-13, 2018. A total of 8 scientists (including a Ph.D student and a postdoc) from AORI were invited to IONTU. Accommodating four themes- Physical Oceanography, Marine Geology and Biogeography, Marine Biogeochemistry, and  Marine Biodiversity and Ecology, 14 oral [...]

 
Establishment of a novel genus for a marine bacterium recovered from the lagoon of Dongsha Island, Taiwan

Establishment of a novel genus for a marine bacterium recovered from the lagoon of Dongsha Island, Taiwan

More than forty isolates of marine, facultatively anaerobic, fermentative bacteria were recovered from sediment samples collected from the lagoon of Dongsha Island, Taiwan, using an anaerobic enrichment culture method. Two of the isolates were selected for characterization and classification in the present study.

 
Molecular assessment of Pocillopora verrucosa (Scleractinia; Pocilloporidae) distribution along a depth gradient in Ludao, Taiwan

Molecular assessment of Pocillopora verrucosa (Scleractinia; Pocilloporidae) distribution along a depth gradient in Ludao, Taiwan

Scleractinian corals identification is mainly based on their skeletal characteristics. However, skeletal features can vary

 
Numerical study and observation reveal dynamics for island wakes in the Kuroshio

Numerical study and observation reveal dynamics for island wakes in the Kuroshio

The wake features in the lee of Green Island off southeast of Taiwan are frequently observed by satellite images (Figure 1)

 
Spatial variation in the morphological traits of Pocillopora verrucosa along a depth gradient in Taiwan

Spatial variation in the morphological traits of Pocillopora verrucosa along a depth gradient in Taiwan

Coral taxonomy typically derives from descriptions of skeletal micro- and macrostructures, however, these characteristics may be altered

 
A small-scaled study provides insight into how fish adapt to future environmental changes

A small-scaled study provides insight into how fish adapt to future environmental changes

Hui-Yu Wang Climate change and anthropogenic effects have caused pronounced changes in physical habitats and biological functions for

 
Pelagic larval duration, growth rate, and population genetic structure ofthe tidepool snake moray Uropterygius micropterus around the southern Ryukyu Islands, Taiwan, and the central Philippines

Pelagic larval duration, growth rate, and population genetic structure ofthe tidepool snake moray Uropterygius micropterus around the southern Ryukyu Islands, Taiwan, and the central Philippines

Wen-Chien Huang  Jen-Chieh Shiao A study by graduate student Wen-Chien Huang and professors Jen-Chieh Shiao and Te-Yu Liao evaluated the effect of pelagic larval duration of demersal fishes on the population genetic structure

 
Fishing, rather than temperature, has the most prominent effect on size structure of exploited fish populations

Fishing, rather than temperature, has the most prominent effect on size structure of exploited fish populations

Chen-Yi Tu and Chih-hao Hsieh Institute of Oceanography, National Taiwan University A study by graduate students Chen-Yi Tu, Kuang-Ting Chen and Professor Chih-hao Hsieh, found that fishing has the most prominent effect

 
Predator and prey biodiversity relationship and its consequences on marine ecosystem functioning—Interplay between nanoflagellates and bacterioplankton

Predator and prey biodiversity relationship and its consequences on marine ecosystem functioning—Interplay between nanoflagellates and bacterioplankton

Jinny Yang and Chih-hao Hsieh Institute of Oceanography, National Taiwan University Understanding the biodiversity effects across trophic levels via predator-prey interactions is

 
D indices: novel biodiversity indices to disentangle food web complexity through network unfolding theory

D indices: novel biodiversity indices to disentangle food web complexity through network unfolding theory

The research project in Japan lead by the scientists in Research Institute for Humanity and Nature, Ryukoku University

 
Scientist of National Taiwan University leading the team with scientists in Japan won 18th Ecological Research Paper Award & 6th Taiwan-Japan Ecology Workshop will be organized in Tainan 2018

Scientist of National Taiwan University leading the team with scientists in Japan won 18th Ecological Research Paper Award & 6th Taiwan-Japan Ecology Workshop will be organized in Tainan 2018

Fei-Tsui Reservoir (FTR) and the simulated seasonal variations of depth profile of methane oxidizing bacteria (MOB).