66 research outputs found
The Alaska Arctic Vegetation Archive (AVA-AK)
The Alaska Arctic Vegetation Archive (AVA-AK, GIVD-ID: NA-US-014) is a free, publically available database archive of vegetation-plot data from the Arctic tundra region of northern Alaska. The archive currently contains 24 datasets with 3,026 non-overlapping plots. Of these, 74% have geolocation data with 25-m or better precision. Species cover data and header data are stored in a Turboveg database. A standardized Pan Arctic Species List provides a consistent nomenclature for vascular plants, bryophytes, and lichens in the archive. A web-based online Alaska Arctic Geoecological Atlas (AGA-AK) allows viewing and downloading the species data in a variety of formats, and provides access to a wide variety of ancillary data. We conducted a preliminary cluster analysis of the first 16 datasets (1,613 plots) to examine how the spectrum of derived clusters is related to the suite of datasets, habitat types, and environmental gradients. We present the contents of the archive, assess its strengths and weaknesses, and provide three supplementary files that include the data dictionary, a list of habitat types, an overview of the datasets, and details of the cluster analysis
Lisina em rações para suínos machos castrados selecionados para deposição de carne magra na carcaça dos 110 aos 125 kg
Características de carcaça e da carne de novilhos superprecoces de três grupos genéticos, gerados por fêmeas de dois anos
Eficiência biológica de vacas de dois grupos genéticos amamentando bezerros puros ou F1, mantidas em diferentes condições de alimentação
Qualidade da carne de novilhos terminados em confinamento e abatidos aos 16 ou 26 meses de idade
Grupo genético e heterose na produção de leite de vacas de corte submetidas a diferentes sistemas de alimentação
Effects of varying the zirconium concentration and 1 wt.% Y on high temperature oxidation of Fe-15wt.%Cr-4wt.%Al alloy under isothermal and cyclic conditions
Evaluation of in situ functional activity of casing soils during growth cycle of mushroom (Agaricus bisporus (Lange) Imbach) employing community level physiological profiles (CLPPs)
On the complexity of following the central path of linear programs by linear extrapolation II
Pressure, Velocity, and Geometry Effect on A12O3 Produced During Aluminized Propellant Combustion
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