A5091877917- Avian ecology and behavior
- Animal Vocal Communication and Behavior
- Animal Behavior and Reproduction
- Plant and animal studies
- Ecology and Vegetation Dynamics Studies
- Species Distribution and Climate Change
- Marine animal studies overview
- Bird parasitology and diseases
- Wildlife Ecology and Conservation
- Rangeland and Wildlife Management
- Vector-borne infectious diseases
- Underwater Acoustics Research
- Pacific and Southeast Asian Studies
- Animal Ecology and Behavior Studies
- Wildlife-Road Interactions and Conservation
- Viral Infections and Vectors
- Media, Journalism, and Communication History
- Mosquito-borne diseases and control
- Innovation, Technology, and Society
- Tree-ring climate responses
- Geology and Paleoclimatology Research
- History of Education in Spain
- Diverse Musicological Studies
- Plant Water Relations and Carbon Dynamics
- Libraries, Manuscripts, and Books
University of Hawaii at Hilo
2016-2025
Broad Institute
2024
Musgrove Park Hospital
2023
InterDigital (United States)
2023
Universitat de Miguel Hernández d'Elx
2017
United States Geological Survey
2005-2008
University of Hawaiʻi at Mānoa
2003-2006
University of Hawaii System
2005
Western Washington University
1983
We used airborne imaging spectroscopy and scanning light detection ranging (LiDAR), along with bioacoustic recordings, to determine how a plant species invasion affects avian abundance community composition across range of Hawaiian submontane ecosystems. Total the ratio native exotic avifauna were highest in habitats canopy cover height. Comparing biophysically equivalent sites, stands dominated by Metrosideros polymorpha trees hosted larger communities than did mixed invasive tree Morella...
The past quarter century has seen an unprecedented increase in the number of new and emerging infectious diseases throughout world, with serious implications for human wildlife populations. We examined host persistence face introduced vector-borne Hawaii, where avian malaria vectors have had a negative impact on most populations Hawaiian forest birds nearly century. studied birds, parasites, nine study areas from 0 to 1,800 m Mauna Loa Volcano, Hawaii January October, 2002. Contrary...
Competition theory predicts that local communities should consist of species are more dissimilar than expected by chance. We find a strikingly different pattern in multicontinent data set (55 presence-absence matrices from 24 locations) on the composition mixed-species bird flocks, which important subunits world over. By using null models and randomization tests followed meta-analysis, we association strengths flocks to be strongly related similarity body size foraging behavior higher for...
Abstract Knowledge that can be gained from acoustic data collection in tropical ecosystems is low‐hanging fruit. There every reason to record and with day, there are fewer excuses not do it. In recent years, the cost of recorders has decreased substantially (some purchased for under US $50, e.g., Hill et al . 2018) technology needed store analyze continuously improving (e.g., Corrada Bravo 2017, Xie 2017). Soundscape recordings provide a permanent site at given time contain wealth invaluable...
Infectious diseases now threaten wildlife populations worldwide but population recovery following local extinction has rarely been observed. In such a case, do resistant individuals recolonize from central remnant population, or they spread small, perhaps overlooked, of individuals? Introduced avian malaria (Plasmodium relictum) devastated low-elevation native birds in Hawaii, at least one species (Hawaii amakihi, Hemignathus virens) that was greatly reduced elevations below about 1000 m...
We developed an epidemiological model of avian malaria (Plasmodium relictum) across altitudinal gradient on the island Hawaii that includes dynamics host, vector, and parasite. This introduced mosquito-borne disease is hypothesized to have contributed extinctions major shifts in distribution highly susceptible native forest birds. Our goal was better understand how biotic abiotic factors influence intensity transmission impact populations Hawaiian illustrates key patterns malaria–forest bird...
Many animals communicate through acoustic signaling, and "acoustic space" may be viewed as a limited resource that organisms compete for. If signals overlap, the information in them is masked, so there should selection toward strategies reduce signal overlap. The extent to which are able partition space acoustically diverse habitats such tropical forests poorly known. Here, we demonstrate single cicada species plays major role frequency timing of communication neotropical wet forest bird...
Wildlife diseases can present significant threats to ecological systems and biological diversity, as well domestic animal human health. However, determining the dynamics of wildlife understanding impact on host populations is a challenge. In Hawai‘i, there ample circumstantial evidence that introduced avian malaria ( Plasmodium relictum ) has played an important role in decline extinction many native forest birds. few studies have attempted estimate disease transmission mortality, survival,...
Passive acoustic monitoring (PAM) studies generate thousands of hours audio, which may be used to monitor specific animal populations, conduct broad biodiversity surveys, detect threats such as poachers, and more. Machine learning classifiers for species identification are increasingly being process the vast amount audio generated by bioacoustic expediting analysis increasing utility PAM a management tool. In common practice, threshold is applied classifier output scores, scores above...
When acoustic signals sent from individuals overlap in frequency and time, interference signal masking may occur. Under the niche hypothesis (ANH), signaling behavior has evolved to partition space minimize with other calling through selection on structure and/or sender’s ability adjust timing of signals. Alternately, under clustering hypothesis, there is potential benefit convergence synchronization structural or temporal characteristics avian community, organisms produce that more than...
<title>Abstract</title> Under the current global biodiversity crisis, there is a need for automated and non-invasive monitoring techniques that are able to gather large amounts of information cost-effectively at scales. One such technique passive acoustic monitoring, which commonly coupled with automatic identification animal species based on their sound. Automated sound analyses usually require training detection algorithms. These algorithms annotated datasets mark occurrence sounds...
Abstract Low-amplitude “whisper songs” are a taxonomically broad phenomenon in birds that could play an important role the suite of behaviors use to communicate. Due its cryptic nature, there inherent difficulties capturing high-quality whisper song recordings without interrupting natural behaviors. Thus, acoustic structure is poorly understood and potential function remains subject debate. Here, we present one first quantitative assessments birds. Using innovative microphone transmitter,...
ABSTRACT The majority of Hawaii's lowland wet forests no longer exist, with many the last remaining patches found on eastern, windward sides largest islands. To better understand successional patterns and invasion in these native systems, we quantified basal area (BA) densities woody species understory cover at nine sites Puna district Island Hawai‘i, representing age gradients stand development both ‘a’ā pāhoehoe lava flows. On flow types, BA increased (from 5 to 50 m 2 /ha) stem decreased...
Sebastián-González, E., R. J. Camp, A. M. Tanimoto, P. De Oliveira, B. Lima, T. Marques, and Hart. 2018. Density estimation of sound-producing terrestrial animals using single automatic acoustic recorders distance sampling. Avian Conservation Ecology 13(2):7. https://doi.org/10.5751/ACE-01224-130207
Abstract: In this study I document the growth rate and age of trees in an old-growth montane Hawaiian wet forest use these results to evaluate cyclic succession model for dynamics. used two methods estimate – crown-class radiocarbon dating. Over 6000 belonging eight species were tagged measured over 7 y on Hawaii Island. Growth rates dominant tree ( Metrosideros polymorpha ) relatively low (mean = 1.3 mm −1 varied with size crown class. 14 C-based estimates 27 M. loosely corroborated based...
We documented patterns of nectar availability and nectarivorous bird abundance over ∼3 years at nine study sites across an 1,800-m elevational gradient on Hawaii Island to investigate the relationship between resource variation abundance. Flower density (flowers ha-1) energy content were measured for monodominant 'Ōhi'a (Metrosideros polymorpha). Four species captured monthly in mist nets surveyed quarterly with point-transect distance sampling each site examine relative Flowering peaks...
The effects of population decline on culturally transmitted behaviours in animals have rarely been described, but may major implications to viability. Learned vocal signals birds are critical importance associated with reproduction, intrasexual interactions and group cohesion, the complexity such as song can serve an honest signal individual's quality well viability a population. In this study, we examined how rapid declines recently experienced by Hawaiian honeycreepers island Kaua‘i (USA)...
Abstract The management of animal endangered species requires detailed information on their distribution and abundance, which is often hard to obtain. When animals communicate using sounds, one option use automatic sound recorders gather the for long periods time with low effort. One drawback this method that processing all manually large amounts Our objective was create a relatively “user‐friendly” (i.e., does not require big programming skills) detection algorithm improve our ability get...
Abstract Avian frugivores historically played important roles as seed dispersers across the Hawaiian Islands, but presently, ‘Ōma‘o ( Myadestes obscurus ) is only extant native frugivore in wild on Island of Hawaii. During recent decades, introduced generalist Japanese White‐eye Zosterops japonicus has become most common bird The movements avian largely dictate how far seeds get dispersed and into what kinds microhabitats. This study compares movement patterns diet to understand a differs...
The Hawaiian honeycreepers are thought to be limited primarily middle- and high-altitude wet forests due anthropogenic factors at lower altitudes, especially introduced mosquitotransmitted avian malaria. However, recent research has demonstrated that least one native species, the Hawai'i 'Amakihi (Hemignathus virens virens), is common in areas of active malaria transmission. We examined current distribution abundance exotic forest birds within approximately 640 km2 low-altitude (0–326 m)...
The Hawaiian honeycreepers (Drepanidinae) are one of the best-known examples an adaptive radiation, but their persistence today is threatened by introduction exotic pathogens and vector, mosquito Culex quinquefasciatus. Historically, species such as amakihi (Hemignathus virens), apapane (Himatione sanguinea), iiwi (Vestiaria coccinea) were found from coastal lowlands to high elevation forests, late 1800's they had become extremely rare in habitats below 900 m. Recently, however, populations...
The endangered Hawaiian Petrel (Pterodroma sandwichensis) is endemic to the main Islands where it nests in underground burrows surrounded by vegetation that varies greatly from island island. Information regarding island-specific nest site selection and habitat characteristics important when considering management needs of species, including control invasive plants protection introduced predators. Extensive search efforts, using nocturnal vocalization visual surveys, resulted locating 71...