Publications by authors named "Kisei R Tanaka"
Article Synopsis
- Rising ocean temperatures are leading to more intense coral bleaching events, making accurate temperature data crucial for monitoring coral reefs.
- Traditional methods using satellite and in situ measurements have limited coverage, prompting the exploration of ocean circulation models as an alternative for tracking reef conditions.
- A study comparing subsurface temperature data with a Regional Ocean Modeling System (ROMS) found it effectively predicts temperature variations and can aid in coral reef management in Hawaii and potentially other Pacific Islands.
Article Synopsis
- One key issue in climate change communication is that the effects of global warming can vary greatly by location, making it hard to connect local actions to global impacts.
- Researchers created a detailed index showing the difference between areas with high emissions and areas experiencing significant temperature increases; almost all of the Earth's surface shows a rise in temperature, despite uneven emissions.
- The index highlights regions with the greatest temperature increases (like the Arctic and parts of Africa) versus areas with lower temperature increases despite high emissions (like Western Europe and Southeast Asia), potentially aiding in public understanding and encouraging global action on climate equity.
The distribution of a group of fish and macroinvertebrates ( = 52) resident in the US Northeast Shelf large marine ecosystem were characterized with species distribution models (SDM), which in turn were used to estimate occurrence and biomass center of gravity (COG). The SDMs were fit using random forest machine learning and were informed with a range of physical and biological variables. The estimated probability of occurrence and biomass from the models provided the weightings to determine depth, distance to the coast, and along-shelf distance COG.
View Article and Find Full Text PDFDuring the 2014-2016 North Pacific marine heatwave, unprecedented sightings of juvenile white sharks (Carcharodon carcharias) emerged in central California. These records contradicted the species established life history, where juveniles remain in warmer waters in the southern California Current. This spatial shift is significant as it creates potential conflicts with commercial fisheries, protected species conservation, and public safety concerns.
View Article and Find Full Text PDFProgress in global shark conservation has been limited by constraints to understanding the species composition and geographic origins of the shark fin trade. Previous assessments that relied on earlier genetic techniques and official trade records focused on abundant pelagic species traded between Europe and Asia. Here, we combine recent advances in DNA barcoding and species distribution modelling to identify the species and source the geographic origin of fins sold at market.
View Article and Find Full Text PDFThe expansion of shell disease is an emerging threat to the inshore lobster fisheries in the northeastern United States. The development of models to improve the efficiency and precision of existing monitoring programs is advocated as an important step in mitigating its harmful effects. The objective of this study is to construct a statistical model that could enhance the existing monitoring effort through (1) identification of potential disease-associated abiotic and biotic factors, and (2) estimation of spatial variation in disease prevalence in the lobster fishery.
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