Three people stand and two crouch down along a rocky, Hawai'i shoreline covered with limu (native seaweed).

UH Sea Grant, partners awarded $68.5M to advance climate resilience

The University of Hawaiʻi Sea Grant College Program (Hawaiʻi Sea Grant) is leading a diverse group of organizations that has been awarded $68.5 million to build a more resilient future for Hawaiʻi.

The project, ʻĀina restoration through community governance to advance climate resilience in the Hawaiian Islands, will build long-term climate resilience by restoring forest, watershed, coastal and marine ecosystems and through improved co-management and community governance of resources.

“We are honored to have been entrusted with this award and opportunities for transformative work across the pae ʻāina,” said Darren T. Lerner, Hawaiʻi Sea Grant director and project lead. “We will work together with two co-leads, Kuaʻāina Ulu ʻAuamo and the State of Hawaiʻi Department of Land and Natural Resources, along with many other partners and communities, to build an enduring program and long-term partnerships in support of vital community governance and ʻāina stewardship for long beyond the five-year project.”

The collaborative of twelve partners spans local and national non-profit organizations, collectives of Indigenous and local stewards, state and county government agencies, and academia.

The funding from the Department of Commerce and National Oceanic and Atmospheric Administration (NOAA) is through the Climate Resilience Regional Challenge, a historic $575 million investment from the Biden-Harris Administration’s Inflation Reduction Act. It is one of only eight awards across the nation and the only one led by a university.

Integrating Native Hawaiian stewardship

The award builds on the knowledge and practices of the moku system, a Hawaiian land tenure and resource stewardship system refined over generations. The moku system divides islands into large tracts of land containing forested landscapes, cultural resources and seascapes to maintain long-term abundance.

Project activities will focus on five moku selected because of their high potential to promote Native Hawaiian stewardship practices and revitalize the moku system in areas that have been underserved by climate adaptation investments: Kona, Kauaʻi; Waiʻanae, Oʻahu; Kona, Molokaʻi; Pūʻali Komohana, Maui and Kohala, Hawaiʻi.

“Reducing risks and advancing climate resilience often means focusing on community-based governance and stewardship,” said NOAA Administrator Rick Spinrad. “This funding will help build a more resilient future for the Hawaiian Islands through planning, protection, and restoration actions.”

In addition to making significant place-based investment in ʻāina restoration and conservation projects, the project will invest in community-centered governance, network building, knowledge exchange and capacity building in the five moku while connecting ongoing work across Hawaiʻi. Eighty percent of the $68.5 million will go beyond the university to directly support community partners and collaborators.

Project partners

  • University of Hawaiʻi Sea Grant College Program (Project Lead)
  • Hawaiʻi Department of Land and Natural Resources (co-lead)
  • Kuaʻāina Ulu ʻAuamo (co-lead)
  • Conservation International Hawaiʻi
  • County of Maui
  • Department of Hawaiian Home Lands
  • Hawaiʻi Conservation Alliance Foundation
  • Hawaiʻi Office of Planning and Sustainable Development
  • Kaʻala Farm Inc.
  • Kupu ʻĀina Corps
  • Mālama Learning Center
  • The Nature Conservancy

Moving forward, the project team will be working to expand the list of partners to include additional community organizations in the five moku, with the goal of long-term partnerships that will support vital community governance and ʻāina stewardship.

Read more at the KITV, Kaua’i Now, NOAA release and UH News.

Five high school students gather around a preserved lancet fish dissection while Blake Stoner-Osborne looks on.

Community Connections: Blake Stoner-Osborne makes deep-sea wonders visible, accessible

The thriving of our communities and ecosystems in Hawai‘i is intricately linked to our connection to, knowledge of, and care for the natural world. The world-class research and innovation at SOEST is intended to be informed by people and place, and accessible and beneficial to all. To honor those who reach beyond academia, we are highlighting members of SOEST who are committed to connecting and engaging with communities and students of all ages in Hawai‘i.

When Blake Stoner-Osborne was in elementary school, a classroom visit from marine biologists working at the Scripps Institution of Oceanography at the University of California San Diego (UCSD) taught him that a career focused on learning about our oceans was both possible and rewarding. Now a doctoral student in the Deep-Sea Fish Ecology Lab in the Department of Oceanography, Stoner-Osborne balances his time between connecting with students and community members and conducting research to understand how islands alter the structure and function of open ocean food webs.

“Looking back, that first classroom visit was what set me on my path to a career in marine science,” said Stoner-Osborne. “It was incredibly impactful for me to connect with those visiting scientists over shared passion for the ocean, [and for them to] share their knowledge with me and guide me towards opportunities I never knew existed. Following their suggestions, I later interned at the Birch Aquarium at UCSD which taught me that connecting with people from all walks of life about shared interests and learning from each other is such a valuable and meaningful experience.”

Now, Stoner-Osborne analyzes DNA and isotopes in specific amino acids to identify differences in the community composition of zooplankton (copepods and krill, for example) between coral reefs and open ocean habitats, and the potential these animals have for connecting the two habitats.

Outreach and communications trainee program

Recently, Stoner-Osborne was selected for the semester-long SOEST outreach and communications trainee program, through which he shared his knowledge, curiosity, and passion for deep-sea zooplankton, fishes, and general ecology with hundreds of teachers and students. He offered workshops, hands-on activities, and presentations at the Hawai‘i STEM Conference, O‘ahu high schools, and the Waikiki Aquarium’s Mauka to Makai community event. 

“My experiences with outreach this semester enhanced my communication skills with a broader age range of participants,” said Stoner-Osborne. “Most of my previous outreach had been with middle and high school-aged students, but I now feel much more comfortable talking with younger age groups as well as a wide age range of adults including parents and grandparents.” 

Improving access to scientific information

Stoner-Osborne continues to be motivated to connect with others and share the joy that comes from understanding the natural world. “Science is a continuously evolving field and there’s constantly more being learned about our oceans and earth systems. Facilitating connections between researchers and the general public remains one of my passions,” he said. “I think it’s massively important that everyone has access to scientific information that invites them to connect with and understand natural systems, ask new and pressing questions, and utilize information to make informed decisions.”  

Funding for the SOEST Outreach and Communications Trainee program was provided by the National Science Foundation (NSF/GEO #2304691) through a Catalyst Award for Science Advancement (CASA).

Read also on UH News.

colorized microbe image.

Three National Microbiome Data Collective Ambassadors selected from UH

Two graduate students and a postdoctoral researcher with the University of Hawai‘i at Mānoa’s School of Ocean and Earth Science and Technology (SOEST) were selected to be National Microbiome Data Collective (NMDC) Ambassadors of 2024.

A highly competitive selection through the Department of Energy’s National Microbiome Data Collaborative program, the Ambassador Program utilizes a cohort-based learning approach to train and support early career researchers who are familiar with the challenges of discovering, accessing, or reusing microbiome data; are committed to working with the NMDC to make microbiome data findable, accessible, interoperable, reusable (FAIR); and are committed to inclusion, diversity, equity, and accountability.

Andrian Gajigan

Andrian Gajigan
Andrian Gajigan

Andrian (Adi) Gajigan, who is pursuing this doctoral degree in oceanography with advisor and professor Grieg Steward, is investigating the interactions and dynamics between phytoplankton and giant viruses in the ocean. To do this, Gajigan is developing and observing lab-based model systems as well as field investigations, specifically, the role of giant viruses in algal bloom demise and phytoplankton succession.

“I am deeply fascinated with microbes because of their often underappreciated importance,” Gajigan said. “The world would cease to exist if we were to remove microbes on the planet. They are the chemists and sentinels of Earth’s climate. They produce and regulate the important chemicals on the planet, oxygen, carbon dioxide, and nitrogen to name a few. They also form the base of the marine food web. They hold so many biological innovations that they perfected for millions of years.”

As a microbiology researcher, Gajigan has found it difficult to search and utilize microbiome-related data and metadata despite the availability of large datasets.

“This ambassador program also allows me to network with fellow researchers and share good practices, and potentially collaborate for future projects,” Gajigan said.

Kacie Kajihara

Kacie Kajihara
Kacie Kajihara

Kacie Kajihara recently graduated from UH Mānoa with a Master’s degree in botany with advisor Nicole Hynson, who is a professor in the Pacific Biosciences Research Center (PBRC) in SOEST. For her Master’s thesis research, Kajihara used a microbiome census from ridge to reef of the Waimea Valley watershed to better understand the building blocks of microbiome stability using co-occurrence networks of fungi and bacteria. She will soon start the Marine Biology Graduate Program to pursue a doctoral degree with Michael Rappé, professor at the Hawai‘i Institute of Marine Biology, where she will study the genomics and ecology of SAR86, a globally prevalent group of marine bacteria.

“It always fascinates me that the health and function of all life on Earth hinges on the activities of such tiny creatures, and that there is still so much to learn about them!” Kajihara said. “I am especially interested in how what we find in the lab and in our data can inform the preservation of ʻāina both here and elsewhere.”

“Through the Ambassador Program, I’ve been able to receive training on FAIR data and other data standards that put equitable science at the forefront, and I look forward to sharing this information with the UH community,” said Kajihara.

Nicola Kriefall

Nicola Kriefall
Nicola Kriefall

Nicola Kriefall is a postdoctoral researcher in PBRC co-advised by Matthew Medeiros and Hynson. Her research focuses on the roles that microorganisms play in shaping food webs, specifically looking at small pools of water where mosquitoes begin their life cycle. Specific microbes may be able to help or harm larger organisms in these types of aquatic food webs. Exploring these questions using the early life stages of mosquitoes holds additional potential for information to combat their disastrous ecosystem and human health impacts–especially in Hawai‘i, where they are invasive. 

“It’s endlessly fascinating to me that single-celled microorganisms we can’t even see with the bare eye are able to take us down or prop us up,” Kriefall said. “For instance, they can be pathogenic and make us ill or reside in our gut and help us digest things we otherwise wouldn’t be able to.” 

“I’m glad I get to work with Kacie and Adi and our local microbiome-interested community through the help of the NMDC program,” said Kriefall. “I’m looking forward to meeting new people at the upcoming events and continuing work with the people I’ve already met.” 

Read also on UH News.

One person is shore fishing with poles while the sun is very low on the horizon.

Marine Protected Areas producing more ‘trophy-size’ fish

Marine Protected Areas (MPAs) are having a positive spillover effect, producing more “trophy-size” fish just outside of the fully protected areas, and the effect is growing stronger over time. That’s according to research led by University of Hawaiʻi at Mānoa scientists at the Hawaiʻi Institute of Marine Biology (HIMB) published in Science Advances. The research provides the first global assessment of the benefits of MPAs. “Trophy-size” refers to fish that are exceptionally long or heavy and are considered a rare, prized catch.

“This standardized global assessment illustrates the benefits that MPAs provide for recreational anglers, confirming the effectiveness of MPAs in enhancing fish biomass and local fisheries,” shared Simone Franceschini, principal investigator of the study and a postdoctoral researcher at HIMB. “Our study found that MPAs may take more than 20 years to show tangible spillover effects in the adjacent areas, which helps to set realistic expectations about the timeframe over which a marine reserve can be expected to have this type of effect on surrounding fisheries.”

This conceptual illustration shows record-sized fish catch starts to accelerate near and far from Marine Protected Areas (MPA) about 20 years after the MPA was established.
This conceptual illustration shows record-sized fish catch starts to accelerate near and far from Marine Protected Areas (MPA) about 20 years after the MPA was established. Image created with generative-AI code in Python.

The Hawaiian archipelago has 13 state and federal Marine Protected Areas (complete list below). The state protected areas, called Marine Life Conservation Districts, are managed by the State of Hawaiʻi Division of Aquatic Resources.

Long-term expectations for MPAs

MPAs have been identified as one of the most effective tools for securing marine biodiversity, but until now the global impact of MPAs on local, recreational fisheries has been unclear. This study provides globally relevant guidance for what management agencies, conservation practitioners, and, importantly, recreational fishers can expect over the long term from the establishment of MPAs.

The research builds on the work by scientists who conducted a study in Florida 20 years ago and discovered that the cumulative number of trophy fish caught near an MPA (within 100km of its boundary) rises rapidly between 12–30 years after MPA establishment.

map diagram
A global map of Marine Protected Areas. Credit: Marine Conservation Institute & Marine Protection Atlas.

“In this paper, we test whether the results of one of the most well-known studies of MPA impacts on recreational fishers can be replicated at a global scale,” explains Elizabeth Madin, co-author of the paper and associate professor at HIMB. “We show that, on average, highly-protected marine ecosystems produce tangible, real-world, long-term benefits for recreational fishers, resulting in a win-win situation for nature and people alike. Nonetheless, it’s important to realize that not every MPA will have the same spillover effects, and that successful MPAs have been shown to depend on community support, enforcement, and effective fisheries management.”

The findings of this study hold important implications for the future of MPAs and the global “30×30” marine conservation initiative, which aims to protect 30% of the world’s oceans by 2030.

“These results provide evidence-based guidance that can help ensure the successful implementation and long-term support of MPAs worldwide,” said co-author John Lynham, who is a UH Mānoa professor of economics. “It’s intriguing to note that various MPAs around the world, despite their differing sizes and characteristics, have demonstrated a similar positive spillover effect and a similar ‘wait time:’ roughly 20 years.”

The study also underscores the importance of setting practical expectations about the benefits of marine reserves for local fisheries. While MPAs can lead to substantial increases in the abundance of large fish, these benefits often require decades to materialize. This requires patience and long-term commitment from policymakers and local communities to maintain support for conservation efforts. Nonetheless, as Callum Roberts, lead author of the original 2001 study upon which the current study was built, points out, “Local fishers will see benefits to their catches from spillover of smaller fish long before that spillover becomes detectable in the form of large trophy fish, which take longer to reach record breaking sizes. So, well protected MPAs can help support local livelihoods within a decade of creation.”

Read also on Honolulu Civil Beat, Science Daily, UH News and Eurekalert.

Makenna Kinsler dancing on a stage in front of a sign that reads "Miss Hawai'i Volunteer"

Miss Hawaiʻi Volunteer 2024: Merging passion and purpose at UH

As a child, Miss Hawaiʻi Volunteer 2024 Makenna Kinsler first became aware of the hardships in her island home when she walked through Kakaʻako with her mom to help the homeless. Now a double major at the University of Hawaiʻi at Mānoa, Kinsler is still impacted by that experience.

“Seeing those vulnerable parts of our community that needed upliftment was really eye-opening,” Kinsler recalls. “I always remember to be grateful and give back where I can because recognizing what I have made me want to help others.”

Driven by her dedication to serve, Kinsler participated in Miss Hawaiʻi Volunteer, a scholarship program that promotes community service, academic excellence and leadership. Raised in Mānoa Valley and educated at La Pietra School for Girls, she remains closely connected to her community, from working knee-deep in loʻi kalo (taro patches) to mālama ʻāina (care for the land) to feeding the hungry.

Merging science with ʻike Hawaiʻi (Indigenous knowledge)

Kinsler at the City Council building

Kinsler is pursuing degrees in global environmental science and Hawaiian studies and is determined to merge both disciplines into her future career as an urban planner. Her vision is to create communities that are sustainable, resilient and rooted in Hawaiian values.

“In Hawaiʻi, we give a lot of importance to places and wahi (locations). I’m taking an ahupuaʻa (land division) class right now and it’s an interesting perspective of how we can model our communities today looking at the urban side of balancing nature and city as Hawaiʻi really rapidly grows our population,” said Kinsler.

Pioneer professors

Currently, Kinsler is immersed in researching climate change impacts for her global environmental science thesis. She finds inspiration from professors at UH Mānoa who are leading innovative projects addressing challenges such as sea level rise in the islands.

“It’s really cool to be in the same room as the pioneers of Hawaiʻi’s future and just seeing firsthand all the cool projects that they’re working on,” Kinsler said.

Hula is life

Hula performers
Hālau Hula Ka Lehua Tuahine at Merrie Monarch in 2023 (Credit: Tracey Niimi/Merrie Monarch Festival)

Kinsler said she is grateful for the opportunity to have stayed in Hawaiʻi for college, not only because it’s just blocks from her home, but it ensures she can continue another long-standing passion, hula.

The trained ʻōlapa (dancer) has studied under kumu hula Hiwa Vaughan and Hālau Hula Ka Lehua Tuahine since she was five. Kinsler has competed in the Merrie Monarch Festival two times, and she performed a hula for the talent portion of the Miss Volunteer America pageant in Tennessee this summer.

“Hula is such a big pillar of my life,” Kinsler said. “I really just wanted to transport people to Hawaiʻi and show my love.”

This fall at UH Mānoa, Kinsler plans to apply for the Combined Bachelor’s & Master’s Degree Pathway or BAM program, which enables students to start on their master’s during their senior year.

Read also on UH News.

Headshots of Reece James (in front of greenery) and Angel White (on stage during her TEDx talk)

Student-adviser pair honored for outstanding marine research, commitment to equity, inclusion

University of Hawai‘i (UH) at Mānoa oceanography graduate student Reece James and professor Angelicque White were selected by the Howard Hughes Medical Institute for the Gilliam Fellows Program. They join the cohort of 50 science graduate student-adviser pairs who are recognized for their outstanding research as well as their commitment to advancing equity and inclusion in science. This is the first ever Gilliam Fellow awarded to a UH Mānoa student.

Administered by HHMI’s Center for the Advancement of Science Leadership and Culture (CASLC), the Gilliam Fellows Program will provide each student-adviser pair with $53,000 in support each year for up to three years of the student’s dissertation research. 

“Being selected for this program is both validating and inspiring; both a recognition of the work that myself and Dr. White have put forth to further the scientific community, and an opportunity to expand our understanding of how we can contribute to the ongoing advancement of diverse, equitable and inclusive life science research,” said James.

James and White’s research involves using imaging tools that can be deployed from the sea surface and lowered through the depths of the ocean to the seafloor. James’ work with the Hawai‘i Ocean Time-series combines this imaging technology with machine learning algorithms to describe the abundance and diversity of small organisms and microbes in the North Pacific. This research helps to better understand how microbes act to transport carbon and redistribute nutrients throughout the water column on daily, seasonal, and interannual time scales. 

Advancing an inclusive graduate school experience

The Gilliam Fellows Program recognizes the importance of mentorship in developing tomorrow’s scientific leaders. Fellows join a vibrant community and are offered leadership training, professional development, and opportunities to engage with and learn from peers, program alumni, and HHMI scientists. Their advisers also join a cohort of peers, participate in HHMI’s intensive, one-year mentorship skills development course, and receive support to promote healthy and inclusive graduate training environments at their home institution. 

“This year’s Gilliam Fellows and their advisers are not only working at the cutting edge of scientific discovery, but they’re also forging new pathways for others to do the same,” said Blanton Tolbert, vice president of CASLC. “Their dedication to creating environments in which researchers of all backgrounds can thrive will have an impact on science for generations to come.”

This program will further the diversity, equity and inclusion (DEI) efforts that James and White have been involved in before and during their time at UH Mānoa. James co-authored the article “Navigating Gender at Sea” that details the experiences of transgender and gender diverse oceanographers during sea-going fieldwork and outlines new recommendations for making seagoing fieldwork more inclusive. Further, James has worked to assess the diversity of graduate student departmental demographics, equitable changes to graduate student finances, and create guidelines for accessible presentation of scientific materials. White has served on the Department of Oceanography’s DEI committee; is a faculty search advocate; and has participated in the American Geophysical Union’s Unlearning Racism in the Geosciences program. 

“We intend to use the funding from the Howard Hughes Medical Institute fellowship, in part, to bring DEI focused seminar speakers to UH Mānoa, in keeping with the blueprint of a graduate student-led initiative, termed “Unpacking Diversity”, designed to address the experiences of marginalized groups in the atmospheric, earth, and ocean sciences,” said James. “This effort intends to spur conversation regarding social justice in academia, and offer resources to address contemporary issues within the ocean sciences for minority communities.”

“We are particularly excited to engage with the Gilliam community, leadership training, and professional development that is offered through the HHMI fellowship,” said White. “This is a chance to engage with other life scientists who value the diversity and equitability of our fields, receive educational support which prioritizes DEI advancement, and to learn from alumni efforts.”

“Gilliam is more than just a fellowship,” says Joshua Hall, senior program officer for the Gilliam Fellows Program. “All of our new fellows will join a community where they are truly celebrated and supported, not just for their scientific accomplishments, but also for the unique ways each and every one of them makes the science ecosystem a better place. Our current fellows consistently report that the community is the best part of being a Gilliam Fellow.”

All told, the Gilliam Fellows Program received applications from a record-breaking 162 different institutions. With the addition of the 2024 cohort, the Gilliam community now totals 501 scientists, including those who have graduated from the program.

Satellite image showing grayish white plumes of smoke and ash moving offshore from the light brown land of Australia.

Impacts of wildfires on clouds, climate research focus of mid-career award 

Smoke particles and dust from wildfires interact with clouds and impact weather and climate, affecting how clouds form, where and when it rains, and even how air moves in the atmosphere. Supported by a Mid-Career Advancement award from the National Science Foundation, Jennifer Griswold, an associate professor and chairperson of Department of Atmospheric Sciences at the University of Hawai‘i at Mānoa School of Ocean and Earth Science and Technology (SOEST), will strive to better understand these interactions, which can aid scientists and policymakers in making smarter decisions to protect community health, improve air quality, and prepare for future wildfires. 

“I’m most interested in having a better understanding of how the atmosphere, clouds and climate are impacted by the particles emitted by large wildfire events through combining satellite observations, my current expertise, and improving global climate model representations of these types of events, a skill I will learn through this project,” said Griswold. “This program and the support I receive through it will expand my research potential and provide additional opportunities for future students.”  

The three-year program and $360,000 in funding provide protected research time, resources, and the means to gain new skills through synergistic and mutually beneficial partnerships. The support is aimed at helping to lift the constraints of service, teaching, or other activities to reduce workload inequities and enable a more diverse scientific workforce at high academic ranks.

The funding will buy out a full semester of teaching and summer overload for each year and cover the one month of salary for Griswold’s mentor at the National Center for Atmospheric Research (NCAR), project scientist Christina McCluskey; and cover travel to NCAR for training and collaboration, fees to attend conferences, and purchasing a new node for Department of Atmospheric Sciences’ high-performance computing cluster.

“I’m very fortunate to have not only the funding from the MCA to buy out my teaching but the support of my Department and the SOEST Dean’s office to take a full year off,” said Griswold.

Learning from events across the Pacific

The devastating Lahaina fires in 2023 significantly impacted the surrounding community and environment. This tragic event renewed Griswold’s focus on how particles produced or transported by large wildfire events can impact air quality and clouds near the fires and downwind.

“In my research field, cloud physics, there are three main ways to investigate clouds and cloud processes: observations and laboratory, satellites, and modelling,” said Griswold. “I learned how to make in situ observations for my doctoral degree, learned how to use satellite data for my postdoctoral research fellowship, and now I’ll have the chance to add the third main research method, modelling.” 

At NCAR, Griswold will learn how to run the Community Earth System Model version 2 and will investigate the impacts of one of the most intense and catastrophic fire seasons on record in Australia, the 2019–20 bushfire season, or “Black Summer”. The associated fires sent a smoke plume all the way to South America and Antarctica and as high as the stratosphere. This large-scale impact means that many points in the climate model will be included in Griswold’s simulation of the event. Simulated and satellite cloud properties from the Black Summer event will allow her to investigate cloud activation, ice nucleation, and impacts of biomass burning aerosol on cloud properties.

Background: Fire rages behind ridge line; midground: city lights shine in Australia’s capital city, Canberra.
Orroral Valley Fire rages on January 28, 2020 in Australia’s capital city, Canberra. Photo by Nick-D; acquired from Wikimedia Commons.

In addition to improving preparedness for other wildfires, this research also helps build more accurate predictions of climate change, which is crucial for developing effective strategies to safeguard communities in Hawai’i and across the globe.

Read also on UH News.

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Climate Atmosphere Earth
A small reef fish with 3 brown/ reddish stripes and 3 white stripes on the top half and dotted scaled on the lower half swims.

Certain reef fish provide insight to surviving climate change

As Earth’s climate changes, current scientific models predict that by 2050, coral reef fishes could shrink by 14–39% due to elevated temperatures. However, a team of researchers have uncovered surprising survival tactics by coral reef fish who inhabit the Arabian Gulf, the warmest waters on Earth.

Led by Jacob Johansen, an associate research professor at the University of Hawaiʻi at Mānoa Hawaiʻi Institute of Marine Biology, and John Burtco-principal investigator at The Mubadala Arabian Center for Climate and Environmental Sciences (ACCESS) at New York University Abu Dhabi, the team discovered adaptations in metabolism and swimming abilities that help fish survive the extreme heat of the Arabian Gulf. 

In the paper “Impacts of ocean warming on fish size reductions on the world’s hottest coral reefs,” published in Nature Communications, the researchers compared two species of fishes, Lutjanus ehrenbergii and Scolopsis ghanam, surviving in elevated Arabian Gulf temperatures to those of similar age living in cooler conditions in the nearby Gulf of Oman. The researchers set out to determine what qualities enable Arabian Gulf reef fish to survive there, where typical summer water temperatures are comparable to worst-case ocean warming projections for many tropical coral reefs worldwide by 2100. 

“The hottest coral reefs in the world are an ideal natural laboratory to explore the future impact of rising water temperatures on fishes,” said Burt. “Our findings indicate that some fish species are more resilient to climate change than previously understood, and help explain why smaller individuals are evolutionarily favored at high temperatures.”

Surprisingly, these fish did not follow leading theoretical predictions where the maximum size of fishes is expected to reduce due to limitations in metabolic oxygen-supply. Instead, these fish demonstrated an unexpected capacity to maintain sufficient oxygen to fuel performance, even at elevated temperatures. 

Global shrinking of fishes phenomenon

“Importantly, our findings reveal that oxygen limitation is not singularly driving the global shrinking of fishes phenomenon,” said Johansen. “There are other factors at play, and the (in)ability to find and capture adequate prey to sustain large body sizes appears to be a critical limitation, with significant implications for our understanding of marine biodiversity in a continuously warming world.”

The study’s findings challenge the prevailing view that oxygen supply limitations in larger fishes are the main reason for smaller fish in warmer waters—the so-called “shrinking of fishes phenomenon.” The species observed did not follow this pattern, suggesting that other factors are also at play. The study proposes a new theory that the decrease in fish sizes and their survival in increasingly warm oceans might be more closely related to an imbalance between how much energy fish species can obtain and how much they need to sustain themselves.

Read Popular Science, UH News, Science Daily, Earth.com, and Mirage News.

Aerial view of Honokea loko iʻa in Keaukaha, Hilo during low tide. Palm trees surround and a 2-lane road boarders one side

Drone technology aid restoration, resilience of Native Hawaiian fishponds

Scientists and kiaʻi loko (fishpond practitioners) have a new tool to aid their efforts to restore and ensure the resilience of Native Hawaiian fishponds. Researchers from the University of Hawai‘i (UH) and fishpond stewards in Hilo, Hawai‘i recently published a study in the Journal of Remote Sensing highlighting the use of uncrewed aerial vehicles (UAVs) to support integrated coastal zone management, including at cultural heritage sites.    

“We discovered that drones are effective and cost-efficient tools for mapping loko iʻa at the community level, providing kiaʻi loko iʻa with better insights into the timing and locations of flooding and future sea level rise impacts on their fishponds,” said Kainalu Steward, lead author of the study and Earth sciences doctoral student in the UH Mānoa School of Ocean and Earth Science and Technology (SOEST).

Loko iʻa, traditional Hawaiian fishponds located along the coastline, have historically provided sustainable seafood sources. These culturally important sites are undergoing revitalization through community-driven restoration efforts. However, as sea level rise poses a significant climate-induced threat to coastal areas, loko iʻa managers are seeking adaptive strategies to address related concerns such as flooding, water quality, and the viability of native fish species. 

King Tides as estimate of future sea level

The researchers’ surveys determined that by 2060, the average sea level along the Keaukaha coastline in Hilo will be similar to the extreme tidal events, known as King Tides, during summer 2023. Steward and Brianna Ninomoto, a master’s student in tropical conservation biology and environmental science at UH Hilo, devised a plan to investigate how future sea level rise will affect loko iʻa by assessing the impacts of the summer 2023 King Tides. 

Throughout the summer, including during the extreme high tide events, researchers collected drone imagery in real time and monitored water levels using sensors submerged at each loko iʻa. With this, they compared flooding predicted from drone-derived topography models and more commonly used Light Detection and Ranging (LiDAR)-derived models to the observed flooding documented by drone imagery. 

Co-author, Brianna Ninomoto, goes over the fieldwork plan with five interns and staff from the Pacific Internship Program for Exploring Science at Laehala
UH Hilo M.S Student and co-author, Brianna Ninomoto, goes over the fieldwork plan with interns and staff from the Pacific Internship Program for Exploring Science (PIPES) at Laehala. Credit: Kainalu Steward.

The team found that digital elevation models derived from drone surveys accurately estimated observed flooding during extreme high tide events, whereas LiDAR flood models, which are nearly 20 years old for the Hilo region, significantly overestimated observed flooding by two to five times. Loko iʻa practitioners, however, reported that occasionally during severe weather and large swell events, these particular areas modeled from LiDAR data do flood. This suggests that data collected by LiDAR offers a more conservative and cautious understanding of coastal flooding, emphasizing that UAV-derived and LiDAR-based data are important components of the suite of coastal management tools.

Supporting Native Hawaiian scientists, community

Funding for this research was awarded through NASA’s Minority University Research and Education Project (MUREP) for a project, “Quantifying Vulnerability to Sea Level Rise Across Multiple Coastal Typologies,” led by co-author and SOEST assistant professor of Earth sciences, Haunani Kane. The program engages underrepresented populations through a wide variety of initiatives. Multiyear grants are awarded to assist Minority Institution faculty and students in research related to pertinent missions.

“One of the goals of this project is to increase the capacity of Native Hawaiian students in assessing and evaluating impacts of sea level rise upon cultural resource sites,” said Kane. “This project supports five undergraduate students and three local Native Hawaiian students as they work towards obtaining their Master’s and Doctorate degrees in science at the University of Hawaiʻi.”

Five local high school students from the Project Hōkūlani STEM internship program clear sediment and debris at Kaumaui loko iʻa
Local high school students from the Project Hōkūlani STEM internship program, who assisted with this study, are clearing sediment and debris at Kaumaui loko iʻa to create more habitat and allow sufficient water flow. Credit: Kainalu Steward.

“This research is important for enhancing coastal community adaptation, resilience, and food security in the face of climate change,” said Ninomoto. “This work was ultimately done to support loko iʻa practitioners along Keaukaha and the future management of their ʻāina as the impacts of flooding become more severe.” 

Another component of the NASA-funded project is storytelling and outreach to the community. John Burns, study co-author and UH Hilo associate professor in marine science and data science, and the MEGA Lab have a community lab space at Mokupāpapa Discovery Center in Downtown Hilo where the research team uses virtual reality and short films to share stories and engage the community in discussions of how climate change is impacting coastal resources in Hawaiʻi.

UH researchers plan to continue working with the kiaʻi loko iʻa in Keaukaha, to provide up-to-date aerial imagery of their fishpond to support restoration efforts. 

“Loko iʻa are examples of how our kūpuna have adapted to changes in climate for generations, and we want to contribute towards their resilience and perpetuation by integrating modern technology,” said Steward.

Read also on MSN, Big Island Video News, AZO Robotics, Tech Explorist, Phys.org, Big Island Now, Eurekalert and UH News.