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HKU Ecologist applied novel statistical method to analysing causal inference and revealed importance of climate change


An example of deep-sea soft sediment ecosystem.
Photo credit: NOAA OER and Ocean Exploration Trust; A. Thurber camera loan. Courtesy of Lisa Levin.
Which of temperature or food is more important for the richness of deep-sea animals? Dr Moriaki YASUHARA from the School of Biological Sciences, the Research Division for Ecology & Biodiversity, and The Swire Institute of Marine Science, The University of Hong Kong (HKU), in collaborating with Hideyuki DOI from University of Hyogo and Masayuki USHIO from Kyoto University, used long-term fossil dataset and novel statistical method to detect causality and found climate control of deep-sea biodiversity.
Deep-sea cover >90 % of the ocean. So, understanding biodiversity drivers in deep-sea is critically important to project future changes in the function of Earth’s ocean system. Recently, two main factors of the deep-sea biodiversity control have been actively debated, which are (1) food supply via marine snow (aka sinking par ....

Moriaki Yasuhara , Masayuki Ushio , Lisa Levin , Hideyuki Doi , School Of Biological Sciences , Kyoto University , University Of Hong Kong , Research Division For Ecology Biodiversity , Swire Institute Of Marine Science , Ocean Exploration , University Of Hyogo , Ocean Exploration Trust , Biological Sciences , Research Division , Swire Institute , Marine Science , Hong Kong , Biology Letters , Convergent Cross Mapping , லிசா லெவின் , பள்ளி ஆஃப் உயிரியல் அறிவியல் , கியோட்டோ பல்கலைக்கழகம் , பல்கலைக்கழகம் ஆஃப் ஹாங் காங் , கடல் ஆய்வு , பல்கலைக்கழகம் ஆஃப் ஹியோகோ , கடல் ஆய்வு நம்பிக்கை ,

Researchers Develop Precision Scale for Extremely High-Pressure Experiments


Scientists from Lawrence Livermore National Laboratory (LLNL), Sandia National Laboratories (SNL), and the University of Hyogo in Kobe, Japan, have developed a way to more precisely measure high-pressure compression in the laboratory up to 10 million atmospheres.
LLNL said pressures exceeding 1 million atmospheres can alter how atoms are packed together, which can lead to new chemical bonding. Testing the quantum theory of condensed matter under enormous pressure has produced such discoveries as helium rain, a transparent sodium metal, superionic water ice, and the transformation of hydrogen into a metallic fluid.
But, until now, most extremely high-pressure experiments – as much as 1 terapascal, or approximately 10 million atmospheres – relied on theoretical models or extrapolation of low-pressure measurements to determine just how much pressure was being applied. ....

New Mexico , United States , Dayne Fratanduono , Lawrence Livermore National Laboratory , National Ignition Facility , Sandia National Laboratories , University Of Hyogo , Sandiaz Machine , Lawrence Livermore National Library , Sandia National Laboratory , Igh Pressure Compression , Dayne Fratanduono , Quantum Chemistry , புதியது மெக்ஸிகோ , ஒன்றுபட்டது மாநிலங்களில் , லாரன்ஸ் லிவர்மோர் தேசிய ஆய்வகம் , தேசிய பற்றவைப்பு வசதி , சாண்டியா தேசிய ஆய்வகங்கள் , பல்கலைக்கழகம் ஆஃப் ஹியோகோ ,