Pacific Island Ecosystems Research Center

Publications

Filter Total Items: 471
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Year Published: 2019

The evolving threat of rapid Ohia death (ROD) to Hawaii’s native ecosystems and rare plant species

Hawai‘i’s most widespread native tree, ‘ōhi‘a lehua (Metrosideros polymorpha), has been dying across large areas of Hawai‘i Island mainly due to two fungal pathogens (Ceratocystis lukuohia and Ceratocystis huliohia) that cause a disease collectively known as Rapid ‘Ōhi‘a Death (ROD). Here we examine patterns of positive detections of...

Fortini, Lucas B.; Kaiser, Lauren R.; Keith, Lisa; Price, Jonathan; Hughes, R. Flint; Jacobi, James D.; Friday, J. B.

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Year Published: 2019

Facilitating adaptation to climate change while restoring a montane plant community

Montane plant communities throughout the world have responded to changes in temperature regimes by shifting ranges upward in elevation, and made downslope movements to track shifts in climatic water balance. Organisms that cannot disperse or adapt biologically to projected climate scenarios in situ may decrease in distributional range and...

Leopold, Christina; Hess, Steve C.

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Year Published: 2019

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.

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Year Published: 2019

Hawaiian hoary bat (Lasiurus cinereus semotus) activity and prey availability at Kaloko-Honokohau National Historical Park

We examined habitat use and foraging activity of the endangered Hawaiian hoary bat (Lasiurus cinereus semotus), as well as nocturnal aerial insect abundance at Kaloko-Honōkohau National Historical Park located in the coastal region of Kailua-Kona, Hawai‘i Island. We evaluated bat activity in two habitat types, wooded shorelines beside brackish...

Montoya-Aiona, Kristina; Pinzari, Corinna A.; Bonaccorso, Frank J
Montoya-Aiona, K., C. A. Pinzari, and F. J. Bonaccorso. 2019. Hawaiian hoary bat (Lasiurus cinereus semotus) activity and prey availability at Kaloko-Honōkohau National Historical Park. Hawai`i Cooperative Studies Unit Technical Report HCSU-TR088, University of Hawai'i at Hilo, Hilo, Hawai‘i. Available: http://hdl.handle.net/10790/4598.

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Year Published: 2019

Bryophyte abundance, composition and importance to woody plant recruitment in natural and restoration forests

Restoration of tropical forests can lead to enhanced ecosystem services and increases in native biodiversity. Bryophytes may be an integral part of the forest restoration process and can serve a critical role in forest functioning. However, the recovery of bryophytes and their ability to facilitate woody plant establishment during restoration...

Rehm, Evan M; Thomas, Miles K; Yelenik, Stephanie G.; Bouck, Dave L; D'Antonio, Carla M.

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Year Published: 2019

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.

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Year Published: 2019

Increased nesting success of Hawaii Elepaio in response to the removal of invasive black rats

In Hawaii and other oceanic islands with few native land mammals, black rats (Rattus rattus) are among the most damaging invasive vertebrate species to native forest bird populations and habitats, due to their arboreal behavior and generalist foraging habits and habitat use. We evaluated the nesting response of Hawaii Elepaio (Chasiempis...

Banko, Paul C.; Jaenecke, Kelly; Peck, Robert W; Brinck, Kevin W.

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Year Published: 2019

Regeneration of Metrosideros polymorpha forests in Hawaii after landscape‐level canopy dieback

Questions(a) Have Metrosideros polymorpha trees become re‐established in Hawaiian forests previously impacted by canopy dieback in the 1970s? (b) Has canopy dieback expanded since the 1970s? (c) Can spatial patterns from this dieback be correlated with habitat factors to model future dieback in this area?Study SiteAn 83,603 ha study...

Mertelmeyer, Linda; Jacobi, James D.; Mueller-Dombois, Dieter; Brinck, Kevin W.; Boehmer, Hans Juergen

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Year Published: 2019

Economical environmental sampler designs for detecting airborn spread of fungi responsible for rapid `Ōhi` death

We designed two new samplers for monitoring airborne particulates that rely on either natural wind currents (Passive Environmental Sampler) or a battery-operated fan (Active Environmental Sampler). Both samplers are significantly less expensive than commercial devices such as Rotorod® and Burkard Samplers that are used in the agricultural and...

Atkinson, Carter T.; Roy, Kylle; Granthon, Carolina

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Year Published: 2019

The epidemiology of avian pox and interaction with avian malaria in Hawaiian forest birds

Despite the purported role of avian pox (Avipoxvirus spp.) in the decline of endemic Hawaiian birds, few studies have been conducted on the dynamics of this disease, its impact on free‐living avian populations, or its interactions with avian malaria (Plasmodium relictum). We conducted four longitudinal studies of 3–7 yr in length and...

Samuel, Michael; Woodworth, Bethany L.; Atkinson, Carter T.; Hart, Patrick J.; Lapointe, Dennis

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Year Published: 2018

Seasonal surveillance confirms the range expansion of Aedes japonicus japonicas (Theobald) (Diptera: Culicidae) to the Hawaiian Islands of Oahu and Kauai

The Asian bush mosquito, Aedes japonicus japonicus (Theobald) was not known to occur in the Hawaii archipelago until it was identified on the island of Hawaii in 2003. This mosquito species remained undetected on the neighboring islands for 8 years before it was discovered at the Honolulu International Airport on Oahu in 2012. By 2015, four Ae. j...

Harwood, James; Fiorenzanoa, Jodi; Gerardoa, Elizabeth; Black, Theodore; Hasty, Jeomhee; Lapointe, Dennis

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Year Published: 2018

2017-2018 Palila abundance estimates and trend

The palila (Loxioides bailleui) population was surveyed annually from 1998–2018 on Mauna Kea Volcanoto determine abundance, population trend, and spatial distribution. In the latest surveys, the 2017population was estimated at 1,177−1,813 birds (point estimate: 1,461) and the 2018 population wasestimated at 778−1,420 (point estimate: 1,051). Only...

Genz, Ayesha S.; Brinck, Kevin W.; Camp, Richard J.; Banko, Paul C.