Filters: Tags: Hakalau Forest National Wildlife Refuge (X)
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Raw acoustic files used to estimate bird densities.
This data describes the coverage and composition of bryophytes and other ground cover within Hakalau Forest National Wildlife Refuge on Hawaii Island. This study aims to evaluate the role of bryophytes in seedling recruitment and thus forest regeneration in different forest types. We compared bryophyte composition and coverage between tree species (Acacia koa and Metrosideros polymorpha) and forest types (intact forest and restoration forest) and then sampled native woody seedling recruitment in the bryophytes as well as other ground covers, such as leaf litter, bare soil, and exotic grass.
This data release includes sampling locations for the coverage and composition of bryophytes, other ground cover and seedling abundance. All sites were within Hakalau Forest National Wildlife Refuge on Hawaii Island. This study aims to evaluate the role of bryophytes in seedling recruitment and thus forest regeneration in different forest types. We compared bryophyte composition and coverage between tree species (Acacia koa and Metrosideros polymorpha) and forest types (intact forest and restoration forest) and then sampled native woody seedling recruitment in the bryophytes as well as other ground covers, such as leaf litter, bare soil, and exotic grass.
Observers at Hakalau Forest National Wildlife Refuge recorded the use by birds of koa (Acacia koa) and ohia (Metrosideros polymorpha) trees in two sites that were recovering from ungulate disturbance and two reforestation sites where trees had been planted. Observations were made pre- and post-defoliation of koa trees by koa moths (Scotorythra paludicola) during 2013. Focal trees at each site were selected haphazardly and observed for 2 minutes to determine the total number individual birds that visited the tree. Birds were counted when they were already present or as they flew into a tree during the 2-minute period, regardless of whether they departed before the end of the observation period. Birds were identified...
Categories: Data;
Tags: Hakalau Forest National Wildlife Refuge,
Hawaii Island,
biota,
body mass,
diet,
This data layer identifies location and boundaries for 100 randomly located plots used to assess the accuracy of a vegetation map of the Hakalau Forest National Wildlife Refuge Hakalau Forest Unit and adjacent lands.
This data layer identifies the Hakalau Forest Unit mapping boundary for a vegetation map of the Hakalau Forest National Wildlife Refuge Hakalau Forest Unit and adjacent lands,
This data release includes data and metadata on tree and shrub basal area as well as bird-mediated and passive seed rain for sites selected to have a range of understory cover under canopy trees (Metrosideros polymorpha and Acacia koa). It also includes seedling germination and survival data for a large-scale seed addition and grass removal experiment that varied both seed rain and grass cover. All sites were within Hakalau Forest National Wildlife Refuge on Hawaii Island. Broadly, this study asks what thresholds of seed rain and native and exotic plant cover are needed for passive forest regeneration.
Bird banding at 2 locations adjacent to one another (one in koa restoration forest, and other in native intact forest) at Hakalau Forest National Wildlife Refuge before and after the start of an outbreak by koa moths (Scotorythra paludicola) during 2013. Each bird was measured with an electronic scale accurate to 1/10th g. Results indicate that insectivorous birds increased in mass, on average, while generalist diet species showed marginally significant increases, and two out of three nectarivorous and frugivorous birds did not have significant change.
Categories: Data;
Tags: Hakalau Forest National Wildlife Refuge,
Hawaii Island,
biota,
birds,
body mass,
This data release includes data and metadata on 1) avian diet 2) seed rain 3) understory plant composition 4) seedling abundance and 5) sampling locations for these sites. In addition it includes data on seedling abundance, grass cover and light levels for a grass removal/seed addition experiment . All sites were within Hakalau Forest National Wildlife Refuge on Hawaii Island. This study looked at multiple biotic interactions that potentially lead to self-reinforcing feedbacks within intact forest and degraded forest sites. Most of this study was done with sampling, however we also implemented an experiment in which we manipulated grass biomass and seed addition to specifically ask how these factors limit native...
Categories: Data;
Tags: Hakalau Forest National Wildlife Refuge,
Hawaii,
avian diet,
botany,
ecology,
This data layer identifies the boundaries of the mapped plant communities for the vegetation map of the Hakalau Forest National Wildlife Refuge Hakalau Forest Unit and adjacent lands, island of Hawaii.
Distance-power relationship data used in our automatic detection algorithm. First release - January 18, 2017 Revised - August 2018, ver. 1.1
Categories: Data;
Types: Citation;
Tags: Call,
Distance-power relationship,
Hakalau Forest National Wildlife Refuge,
Hawaiˊi ˊamakihi (Chlorodrepanis virens),
Hawaiˊi, USA
This data release includes data and metadata on litterfall rates, foliar nitrogen and carbon, grass biomass, soil nitrogen and carbon, and native outplant survival rates for an experiment that added large quantities of woody litter to a restoration forest in an attempt to lower soil nitrogen and exotic grass biomass. All sites were within Hakalau Forest National Wildlife Refuge on Hawaii Island. Broadly, this study looked at the ability to alter soil nitrogen cycling, exotic grass biomass and native outplant survival with large quantities of Metrosideros polymorpha litter in a forest dominated by Acacia koa.
This data release includes data and metadata on litterfall rates of the two dominant canopy trees (Metrosideros polymorpha and Acacia koa) in a restoration forest in Hawaii. All sites were within Hakalau Forest National Wildlife Refuge on Hawaii Island. Broadly, this study looked at the ability to alter soil nitrogen cycling, exotic grass biomass and native outplant survival with large quantities of Metrosideros polymorpha litter in a forest dominated by Acacia koa.
Categories: Data;
Tags: Hakalau Forest National Wildlife Refuge,
Hawaii,
avian diet,
botany,
ecology,
This data release includes data and metadata on 1) avian diet 2) seed rain 3) understory plant composition 4) seedling abundance and 5) sampling locations for these sites. In addition it includes data on seedling abundance, grass cover and light levels for a grass removal/seed addition experiment . All sites were within Hakalau Forest National Wildlife Refuge on Hawaii Island. This study looked at multiple biotic interactions that potentially lead to self-reinforcing feedbacks within intact forest and degraded forest sites. This data, in particular, focuses on the basal area of different species of fruiting plants within 20m of all of the seedrain traps.
Categories: Data;
Tags: Hakalau Forest National Wildlife Refuge,
Hawaii,
avian diet,
botany,
ecology,
It is unclear whether DNA lysis buffers used for preservation of whole blood samples from Hawaiian forest birds cause denaturation and loss of antigen binding capability of antibody molecules. If their antigen binding capability is not affected, then the samples can be used in serological assays to provide an independent assessment of the accuracy of PCR (polymerase chain reaction) diagnostic tests for avian malaria. This data set reports raw absorbance measurements that were collected with a BioRad Model 3550 ELISA plate reader at a wavelength setting of 405 nm for different dilutions of blood from an infected Hawaii Amakihi that were preserved in PBS (phosphate buffered saline), TEN (Tris-Ethylenediaminetetraacetic...
Categories: Data;
Tags: Chlorodrepanis virens,
ELISA,
Hakalau Forest National Wildlife Refuge,
Hawaii,
Hawaii Amakihi,
This dataset contains the point-transect distance sampling records of Hawaii Akepa collected at Hakalau Forest National Wildlife Refuge between 1987 and 2017. These data include the survey point locations, observer details, time of day, and sampling conditions during the counts. In addition, the data include the elevation and alliance level habitat classification at the survey points. Provided here in the data release is the single tabular dataset containing the project’s bird and habitat data.
Categories: Data;
Tags: Density estimation,
Ecology,
Hakalau Forest National Wildlife Refuge,
Hawai`i, USA,
Hawaii Akepa,
This data release includes data and metadata on seedling abundance, composition, and rooting substrate within Hakalau Forest National Wildlife Refuge on Hawaii Island. This study aims to evaluate the role of bryophytes in seedling recruitment and thus forest regeneration in different forest types. We compared bryophyte composition and coverage between tree species (Acacia koa and Metrosideros polymorpha) and forest types (intact forest and restoration forest) and then sampled native woody seedling recruitment in the bryophytes as well as other ground covers, such as leaf litter, bare soil, and exotic grass.
Acoustic derived point-transect data used to estimate densities of Hawaiˊi ˊamakihi (Chlorodrepanis virens).
Categories: Data;
Types: Citation;
Tags: Acoustic data,
Calls,
Density estimation,
Hakalau Forest National Wildlife Refuge,
Hawaiˊi ˊamakihi (Chlorodrepanis virens),
This data layer identifies the full mapping boundary for a vegetation map of the Hakalau Forest National Wildlife Refuge Hakalau Forest Unit and adjacent lands, island of Hawaii.
This data release includes data and metadata on 1) avian diet 2) seed rain 3) understory plant composition 4) seedling abundance and 5) sampling locations for these sites. In addition it includes data on seedling abundance, grass cover and light levels for a grass removal/seed addition experiment . All sites were within Hakalau Forest National Wildlife Refuge on Hawaii Island. This study looked at multiple biotic interactions that potentially lead to self-reinforcing feedbacks within intact forest and degraded forest sites.
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