A central BIEN goal is to bring together data on plant distribution, abundance and traits, with the goal of predicting and mitigating the effects of climate change on plant species and communities.
The BIEN database provides a common schema for merging georeferenced observations of individuals and species from specimens, vegetation inventories, and regional checklists, with measurements of species-level traits such as size, growth form, wood density, specific leaf area, etc. Currently these primary data are available only to members of the BIEN working group. However, our goal is to make available via this website any data whose owner is willing to make public access. We are currently working on securing distribution permissions. Derived products such as species niche models and range maps will also be made publicly available through the BIEN website.
BIEN can also manage data not yet ready for public release. We will provide tools to enable researchers to share their data selectively with other researchers on an individual basis. The development of user-managed data networking tools is central to BIEN's mission of promoting collaboration and enabling research at regional and global scales.
Below is a summary of data in the current (BIEN 3.4) database.
|Trait name||Units||Number of Species||Number of Records|
|diameter at breast height (1.3 m)||cm||1333||216256|
|flower pollination syndrome||2067||2143|
|leaf carbon content per leaf dry mass||mg.g-1||1089||4843|
|leaf carbon content per leaf nitrogen content||1718||3500|
|leaf dry mass per leaf fresh mass||mg.g-1||2511||17790|
|leaf life span||months||742||6961|
|leaf nitrogen content per leaf area||kg.m-2||1932||4388|
|leaf nitrogen content per leaf dry mass||mg.g-1||4471||16824|
|leaf phosphorus content per leaf area||g.m-2||726||1288|
|leaf phosphorus content per leaf dry mass||mg.g-1||2313||8189|
|leaf photosynthetic rate per leaf area||µmol.m-2.s-1||1575||5407|
|leaf photosynthetic rate per leaf dry mass||µmol.g-1.s-1||1286||4334|
|leaf stomatal conductance for H2O per leaf area||mol.H2O.m-2.s-1||740||2215|
|leaf stomatal conductance per leaf area||µmol.m-2.s-1||511||946|
|plant flowering begin||month||4841||13731|
|plant flowering begin||date||4841||13731|
|plant flowering duration||months||1031||1075|
|stem dry mass||kg||531||5193|
|stem wood density||g.cm-3||7880||39162|
|whole plant dispersal syndrome||1259||1324|
|whole plant growth form||63586||67413|
|whole plant growth form diversity||63586||67413|
|whole plant height||m||5802||188372|
|whole plant leaf area per whole plant leaf dry mass||m2·kg-1||6219||57095|
|whole plant leaf dry mass||g||2420||28414|
|whole plant sexual system||1287||1348|
|whole plant vegetative phenology||6311||6706|
|whole plant woodiness||44739||49061|