Eben H Paxton, Ph.D.
Biography
Education:
Ph.D. 2008 Biology, Northern Arizona University, Flagstaff, AZ
M.S. 2000 Biology, Northern Arizona University, Flagstaff, AZ
B.S. 1991 Evergreen State College, Olympia, WA
Specialty: Avian ecology and conservation, demographic modeling, conservation genetics
Research Interests: My research focuses on understanding factors that affect population dynamics – why populations increase or decline over time – and through an understanding of the “why” populations change in size provide natural resource managers information on “how” to maintain healthy populations. My research has focused mainly on birds, mostly endangered species, using field research, modeling, and genetic research to understand population dynamics and identify possible conservation actions to help imperiled populations. My work in Hawai‘i is focused on the native Hawaiian forest birds.
Personal Interests: Hunting, fishing, and lounging at the beach
Science and Products
Avian Malaria Genomic Research Project
Habitat destruction, invasive plants, non-native predators and competitors, and introduced diseases have decimated the diverse, endemic native forest bird community of Hawai‘i. In particular, avian malaria (Plasmodium relictum), which is transmitted by the introduced Culex quinquefasciatus mosquito, has caused dramatic declines and extinctions in many native birds. Fortunately, Cx....
Ecology and Demography of Hawaiian Forest Birds
Many of Hawai‘i’s forest birds have shown significant declines in the past 200 years, with many currently listed as endangered species. Multiple threats have been identified as contributing to declines, including disease, invasive species, habitat loss, and decreased survivorship and productivity caused by introduced predators. Demographic and ecological studies are needed to determine how...
Thresholds to Restoration
Mesic forests of Hawai‘i island provide an ideal system for the study of forest restoration because they have a similar history to other tropical and subtropical forests globally, while maintaining a relatively simple species assemblage. Many of these forests were cleared for grazing, and then later abandoned, to become dominated by pasture grasses that form competitive layers such that...
Ecology of Hawaiian Waterbirds
Loss of wetlands, invasive plants, and non-native predators pushed Hawaii’s waterbirds to the brink of extinction by the early 1900s, although population numbers have improved somewhat in recent decades with conservation efforts. Nonetheless, all Hawaiian waterbirds have global population sizes estimated around or below below 2,000 individuals, making them still highly vulnerable to extinction...
Population Genetics and Emergency Management of Two Kauai Island Endangered Species
The Challenge: The Akeke’e (Loxops caeruleirostris) and the Akikiki (Oreomystis bairdi), two species of Hawaiian honeycreeper, are critically endangered bird species endemic to high elevation ohia forests on the Hawaiian island of Kauai. Both species have suffered severe population declines and range contractions in recent decades. Akeke’e are currently thought to number ca. 950 wild...
Dynamics of a Koa Looper Moth Outbreak and Response by the Native Forest Community
A massive outbreak of the native koa looper moth (Scotorythra paludicola; Geometridae) defoliated more than a third of the koa (Acacia koa) forest on Hawai‘i Island during 2013–2014. Our objective was to record the dynamics of the koa looper (Scotorythra paludicola) outbreak and evaluate the response to the outbreak by the forest ecosystem generally as well as select native and invasive...
Vulnerability of Hawaiian Forest Birds to Climate Change
The Hawaiian Islands are home to some of the world’s most culturally valuable but imperiled forest birds, including brightly colored native honeycreepers, many of which are threatened or endangered. One of the major threats these birds face is avian malaria, which is spread by a species of introduced mosquito and can have death rates exceeding 90 percent. For decades, upper mountain forests...
Hawaii Island bird response to koa moth outbreak, 2013-2014
This data release includes metadata and tabular data that document the responses of birds to changes in habitat conditions before and after koa (Acacia koa) defoliation by koa moths (Scotorythra paludicola). Data sets document changes in the (1) use of tree species, (2) arthropod composition of diets, and (3) body mass.
Hawaii Island locations of reintroduced Alala from automated radio telemetry tracking system, 2017 cohort
Alala, or Hawaiian Crow (Corvus hawaiiensis), were extinct in the wild since the early 2000s. The first effort to reintroduce captive bred Alala back into the wild was conducted at Puu Makaala Natural Area Reserve on Hawaii Island. The 2017 release cohort were released in two stages and were the only Alala in the wild.
Hawaii Volcanoes National Park stable isotope values from Hawaii forest birds 2012
Blood and feathers were collected from Hawaii forest birds (Apapane and Hawaii Amakihi) in high elevation forest to assess evidence for altitudinal movement. Feathers, red blood cells and plasma were analyzed for hydrogen, carbon, and nitrogen stable isotope ratios, and these were used to infer changes in elevation and diet over time. For each species, at one of 3 sites, isotope v
Hawaii Island forest bird response to simulated nest predator 2015-2016
Hawaii forest birds nesting in Hakalau Forest National Wildlife Refuge were exposed to models of predators near their nests to measure behavioral responses. Responses to potential nest predators included vocalization rate, movement behavior, and nestling feeding. Predators were inert stick, introduced but abundant predator, a rat, and a novel predator, a snake, that does not occur o
Oahu Island Hawaiian stilt GPS satellite tracking data, 2017-2018
Lotek Pinpoint Global Positioning System (GPS) Argos Satellite tracking tags were placed on 4 Hawaiian Stilts on Oahu island in 2017. The birds were tracked from 19 July 2017 to 12 February 2018, with locations taken daily every 1.5 hours from 0400to 2000 Hawaii Standard Time. For each location, a description of the general habitat as 1) Wetland, 2) undeveloped field, 3) sport f
Distilling professional opinion to gauge vulnerability of Guam avifauna to Brown Treesnake predation
The avifauna of Guam was devastated by the introduction of the Brown Treesnake, and the restoration of native birds would need to address the problem with eradication or suppression of BTS. With eradication of the snake unlikely in the near term, and suppression capabilities limited to specific finite areas, key information for reintroductions is...
McElderry, Robert; Paxton, Eben H.; Nguyen, Andre; Siers, Shane R. Bridging the research-implementation gap in avian conservation with translational ecology
The recognized gap between research and implementation in avian conservation can be overcome with translational ecology, an intentional approach in which science producers and users from multiple disciplines work collaboratively to co-develop and deliver ecological research that addresses management and conservation issues. Avian conservation...
Saunders, Sarah P.; Wu, Joanna X.; Gow, Elizabeth A.; Adams, Evan A.; Bateman, Brooke L.; Bayard, Trina; Beilke, Stephanie; Dayer, Ashley A.; Fournier, Auriel M.V.; Fox, Kara; Hamilton, Christoper; Heglund, Patricia J.; Lerman, Susannah B.; Michel, Nicole L.; Paxton, Eben H.; Şekercioğlu, Çağan H.; Smith, Melanie A.; Thogmartin, Wayne E.; Woodrey, Mark S; van Riper, Charles Linking climate niches across seasons to assess population vulnerability in a migratory bird
Global loss of biodiversity has placed new urgency on the need to understand factors regulating species response to rapid environmental change. While specialists are often less resilient to rapid environmental change than generalists, species-level analyses may obscure the extent of specialization when locally adapted populations vary in climate...
Ruegg, Kristen; Anderson, Eric; Somveille, Marius; Bay, Rachael A.; Whitfield, Mary J.; Paxton, Eben H.; Smith, Thomas B. Automated telemetry reveals post-reintroduction exploratory behavior and movement patterns of an endangered corvid, ʻAlalā (Corvus hawaiiensis) in Hawaiʻi, USA
Continuous movement monitoring is a powerful tool for evaluating reintroduction techniques and assessing how well reintroduced animals are adjusting to the wild. However, to date, continuous monitoring has only occurred for large-bodied species capable of carrying heavy tracking devices. In this study we used an automated VHF radio...
Smetzer, Jennifer R; Greggor, Alison L; Paxton, Kristina L.; Masuda, Bryce M; Paxton, Eben H. Divergent movement patterns of adult and juvenile ‘Akohekohe, an endangered Hawaiian Honeycreeper
The movement patterns of birds across a landscape are often highly variable and influenced by complex interactions between individuals and environments. Because periods of movement can be marked by high mortality, especially among juvenile birds, understanding these patterns may be vital for the conservation of many bird species. However, these...
Wang, Alex X; Paxton, Eben H.; Mounce, Hanna L; Gorresen, Paulo Marcos 2018 Kaua'i forest bird population estimates and trends
Kaua‘i's native forest birds have experienced steep declines since the beginning of systematic surveys in 1981, and declines have accelerated in recent decades. This report details the analysis of the most recent surveys conducted in 2018. Incorporating the new survey results, long-term trends continue to show sharp declines for all native...
Paxton, Eben H.; Brinck, Kevin W.; Crampton, Lisa H.; Hite, Justin; Costantini, Maria Stable isotope analysis of multiple tissues from Hawaiian honeycreepers indicates elevational movement
We have limited knowledge of the patterns, causes, and prevalence of elevational migration despite observations of seasonal movements of animals along elevational gradients in montane systems worldwide. While a third of extant Hawaiian landbird species are estimated to be elevational migrants this assumption is based primarily on early naturalist’...
Paxton, Kristina L.; Kelly, Jeffery F; Pletchet, Sandra M; Paxton, Eben H. Keeping Hawai‘i's forest birds one step ahead of disease in a warming world
Hawai‘i’s high-elevation forests provide a critical refuge from disease for native forest birds. However, global warming is facilitating the encroachment of mosquitoes and the diseases they transmit into increasingly higher elevations of remaining refugia, threatening the viability of the forest birds across the islands. Multiple management...
Paxton, Eben H.; Kraus, Jim Response to terrestrial nest predators among endemic and introduced Hawaiian birds
Birds free from nest predators for long periods may either lose the ability to recognize and respond to predators or retain antipredator responses if they are not too costly. How these alternate scenarios play out has rarely been investigated in an avian community whose members have different evolutionary histories. We presented models of two nest...
Cummins, George C; Theimer, Tad C; Paxton, Eben H. Frequent use of upland habitats by the endangered Hawaiian stilt (Himantopus mexicanus knudseni)
The Hawaiian Stilt, or Ae’o (Himantopus mexicanus knudseni), is an endangered waterbird endemic to the Hawaiian Islands. Loss of suitable wetland habitats due to anthropogenic development is a leading cause for decline, as well as the introduction of non-native predators and invasive wetland plants. This study fitted four Hawaiian Stilts with GPS...
Kawasaki, Martha; Hart, Patrick J.; Paxton, Eben H. Evaluating community-level response to management actions across a diverse Hawaiian forest bird community
Although species‐specific approaches are necessary to understand the dynamics of individual species composing a community, they do not offer a framework for making optimal management decisions at the community level. Here, we present a simple framework for comparing the response of entire communities to multiple management scenarios. Our approach...
Guillaumet, Alban; Paxton, Eben H. Seasonality and prevalence of pollen collected from Hawaiian nectarivorous birds
Hawaiian nectarivorous forest birds play a vital ecological role as pollinators in Hawaiian ecosystems. However, little is known about what nectar resources are utilized by Hawai‘i’s nectarivorous birds, how seasonality influences nectar availability, and how nectar preference differs by bird species. We sampled pollen from the heads of ‘i‘iwi (...
van Dyk, Kathryn; Paxton, Kristina L.; Hart, Patrick J.; Paxton, Eben H.
Friday's Findings - October 2 2020
Hawaii Avian Genomics: Searching the Genomic ‘Haystack’ for Genes Associated with Disease Immunity
Date: October 2, 2020 from 2-2:30 p.m. eastern time
Speakers: Eben Paxton, USGS Pacific Island Ecosystems Research Center
...
Hawaiian Birds Rapidly Colonize Young Restoration Forest
Forest birds on the island of Hawaii are responding positively to being restored in one of the largest, ongoing reforestation projects at Hakalau Forest National Wildlife Refuge, according to a new study released July 10 in the journal Restoration Ecology.
Scientists Evaluate Ways to Save Hawaiian Honeycreeper
Long distance flights in search of flowering trees threatens the Hawaiian Iiwi as climate change increases the distribution of avian diseases
New Study Supports the Rarity and Limited Range of a Kauai Endemic Bird
Approximately 500 Puaiohi exist in the wild, all on Kauai
Declining Bird Community on Kauai Island Reveals Threat of Changing Environmental Conditions
Kauai Island forest birds at tipping point toward extinction