Pacific Island Ecosystems Research Center

Publications

Filter Total Items: 454
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Year Published: 2018

Population estimates of the Endangered Hawaiʻi ʻĀkepa (Loxops coccineus) in different habitats on windward Mauna Loa

Endangered Hawai‘i ʻĀkepas (Loxops coccineus) are endemic to Hawai‘i island, where they occur in five spatially distinct populations. Data concerning the status and population trends of these unique Hawaiian honeycreepers are crucial for assessing the effectiveness of recovery and management actions. In 2016, we used point‐transect distance...

Judge, Seth W.; Camp, Richard J.; Hart, Patrick J.; Kichman, Scott T.
Judge, S. W., R. J. Camp, P. J. Hart, and S. T. Kichman. 2018. Population estimates of the Endangered Hawaiʻi ʻĀkepa (Loxops coccineus) in different habitats on windward Mauna Loa. Journal of Field Ornithology 89:11–21.

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Year Published: 2018

The effect of isolation, fragmentation, and population bottlenecks on song structure of a Hawaiian honeycreeper

Little is known about how important social behaviors such as song vary within and among populations for any of the endemic Hawaiian honeycreepers. Habitat loss and non‐native diseases (e.g., avian malaria) have resulted in isolation and fragmentation of Hawaiian honeycreepers within primarily high elevation forests. In this study, we examined how...

Pang-Ching, Joshua M.; Paxton, Kristina L.; Paxton, Eben H.; Pack, Adam A.; Hart, Patrick J.
Pang‐Ching, J. M., K. L. Paxton, E. H. Paxton, A. A. Pack, and P. J. Hart. 2018. The effect of isolation, fragmentation, and population bottlenecks on song structure of a Hawaiian honeycreeper. Ecology and Evolution 8:2076–2087. Available: https://doi.org/10.1002/ece3.3820

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Year Published: 2018

Rapid colonization of a Hawaiian restoration forest by a diverse avian community

Deforestation of tropical forests has led to widespread loss and extirpation of forest bird species around the world, including the Hawaiian Islands which have experienced a dramatic loss of forests over the last 200–800 years. Given the important role birds play in forest ecosystem functions via seed dispersal and pollination, a bird community's...

Paxton, Eben H.; Yelenik, Stephanie G.; Borneman, Tracy E.; Rose, Eli; Camp, Richard J.; Kendall, Steve J.
Paxton, E. H., S. G. Yelenik, T. E. Borneman, E. T. Rose, R. J. Camp, and S. J. Kendall. 2018. Rapid colonization of a Hawaiian restoration forest by a diverse avian community. Restoration Ecology 26:165–173.

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Year Published: 2017

Vegetation response of a dry shrubland community to feral goat management on the island of Moloka‘i, Hawai‘i

The Hawaiian Islands are well known for their unique ecosystem assemblages that have a high proportion of endemic flora and fauna. However, since human colonization of this archipelago—starting with the arrival of Polynesian sailors approximately 1,200 years ago, and particularly following western contact in 1778—thousands of non-native species...

Jacobi, James D.; Stock, Jonathan
Jacobi, J.D., and Stock, J., 2017, Vegetation response of a dry shrubland community to feral goat management on the island of Moloka‘i, Hawai‘i: U.S. Geological Survey Scientific Investigations Report 2017–5136, 28 p., https://doi.org/10.3133/sir20175136.

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Year Published: 2017

How many Laysan Teal Anas laysanensis are on Midway Atoll? Methods for monitoring abundance after reintroduction

Wildlife managers often request a simple approach to monitor the status of species of concern. In response to that need, we used eight years of monitoring data to estimate population size and test the validity of an index for monitoring accurately the abundance of reintroduced, endangered Laysan Teal Anas laysanensis. The population was...

Reynolds, Michelle H.; Courtot, Karen; Hatfield, Jeffrey
Reynolds, M. H., K. N. Courtot, and J. S. Hatfield. 2017. How many Laysan teal Anas laysanensis are on Midway Atoll? Methods for monitoring abundance after reintroduction. Wildfowl 67:60–71. Available: https://wildfowl.wwt.org.uk/index.php/wildfowl/article/view/2664/1781

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Year Published: 2017

Interactions among invasive plants: Lessons from Hawai‘i

Most ecosystems have multiple-plant invaders rather than single-plant invaders, yet ecological studies and management actions focus largely on single invader species. There is a need for general principles regarding invader interactions across varying environmental conditions, so that secondary invasions can be anticipated and managers can...

D'Antonio, Carla M.; Ostertag, Rebecca; Cordell, Susan; Yelenik, Stephanie G.
D’Antonio, C. M., R. Ostertag, S. Cordell, and S. Yelenik. 2017. Interactions among invasive plants: lessons from Hawai‘i. Annual Review of Ecology, Evolution, and Systematics 48:521–541. Available: http://www.annualreviews.org/doi/abs/10.1146/annurev-ecolsys-110316-022620

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Year Published: 2017

Feral goats and sheep

No abstract available.

Pitt, William C.; Beasley, James; Witmer, Gary W.; Hess, Steve C.; Van Vuren, Dirk H.; Witmer, Gary W.
Hess, S. C., D. H. Van Vuren, and G. W. Witmer. 2017. Feral goats and sheep. Pages 287–307 in W. C. Pitt, J. Beasley, and G. W. Witmer, editors. Ecology and Management of Terrestrial Vertebrate Invasive Species in the United States. CRC Press, Boca Raton.

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Year Published: 2017

Monitoring Hawaiian biodiversity: Pilot study to assess changes to forest birds and their habitat

Biological diversity, or biodiversity, is the variety and abundance of species in a defined area, and is one of the oldest and most basic descriptions of biological communities. Understanding how populations and communities are structured and change over space and time in response to internal and external forces is a management priority. Effective...

Gorresen, P. Marcos; Camp, Richard J.; Gaudioso, Jacqueline; Brinck, Kevin W.; Berkowitz, Paul; Jacobi, James D.

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Year Published: 2017

No evidence of critical slowing down in two endangered Hawaiian honeycreepers

There is debate about the current population trends and predicted short-term fates of the endangered forest birds, Hawai`i Creeper (Loxops mana) and Hawai`i `Ākepa (L. coccineus). Using long-term population size estimates, some studies report forest bird populations as stable or increasing, while other studies report signs of population...

Rozek, Jessica C.; Camp, Richard J.; Reed, J. Michael
Rozek, J. C., R. J. Camp, and J. M. Reed. 2017. No evidence of critical slowing down in two endangered Hawaiian honeycreepers. PLOS ONE 12:e0187518. Available: http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0187518

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Year Published: 2017

Assessing the potential of translocating vulnerable forest birds by searching for novel and enduring climatic ranges

Hawaiian forest birds are imperiled, with fewer than half the original >40 species remaining extant. Recent studies document ongoing rapid population decline and pro- ject complete climate-based range losses for the critically endangered Kaua’i endemics ‘akeke’e (Loxops caeruleirostris) and ‘akikiki (Oreomystis bairdi) by end-of-century due to...

Fortini, Lucas B.; Kaiser, Lauren R.; Vorsino, Adam E.; Paxton, Eben H.; Jacobi, James D.
Fortini, L. B., L. R. Kaiser, A. E. Vorsino, E. H. Paxton, and J. D. Jacobi. 2017. Assessing the potential of translocating vulnerable forest birds by searching for novel and enduring climatic ranges. Ecology and Evolution 7:9119–9130. Available: http://onlinelibrary.wiley.com/doi/10.1002/ece3.3451/full

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Year Published: 2017

Monitoring eradication of European mouflon sheep from the Kahuku Unit of Hawai‘i Volcanoes National Park

European mouflon (Ovis gmelini musimon), the world's smallest wild sheep, have proliferated and degraded fragile native ecosystems in the Hawaiian Islands through browsing, bark stripping, and trampling, including native forests within Hawai‘i Volcanoes National Park (HAVO). HAVO resource managers initiated ungulate control efforts in the 469 km2...

Judge, Seth; Hess, Steven C.; Faford, Jonathan K.; Pacheco, Dexter; Leopold, Christina
Judge, S. W., S. C. Hess, J. K. Faford, D. Pacheco, and C. R. Leopold. 2017. Monitoring eradication of European mouflon sheep from the Kahuku Unit of Hawai‘i Volcanoes National Park. Pacific Science 71:425–436. Available: http://www.bioone.org/doi/full/10.2984/71.4.3

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Year Published: 2017

Ecosystem vs. community recovery 25 years after grass invasions and fire in a subtropical woodland

Despite a large body of research documenting invasive plant impacts, few studies have followed individual invaded sites over decades to observe how they change, and none have contrasted how compositional impacts from invasion compare to ecosystem-process impacts over a multi-decadal time-scale. Using direct measurements of plant density and...

D'Antonio, Carla M.; Yelenik, Stephanie G.; Mack, Michelle C.
D'Antonio, C. M., S. G. Yelenik, and M. C. Mack. 2017. Ecosystem vs. community recovery 25 years after grass invasions and fire in a subtropical woodland. Journal of Ecology 105:1462–1474.