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Data

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 4.1) database.

Total observations: 206241288
Specimens: 63498238
Plot observations: 17430379
Plots: 364477
Species: 485902
       
Trait name Units Number of Species Number of Records
diameter at breast height (1.3 m) cm 9975 14929488
flower color 2624 3445
flower pollination syndrome 2075 2143
fruit type 322 363
inflorescence length cm 356 389
leaf area mm2 4133 32559
leaf area per leaf dry mass m2.kg-1 5309 51894
leaf carbon content per leaf dry mass mg.g-1 1093 4843
leaf carbon content per leaf nitrogen content 1726 3500
leaf compoundness 893 976
leaf dry mass g 2440 28486
leaf dry mass per leaf fresh mass mg.g-1 2528 17790
leaf fresh mass g 491 5800
Leaf lamina fracture toughness J.m-2 307 363
leaf life span months 419 6212
leaf nitrogen content per leaf area kg.m-2 1243 2414
leaf nitrogen content per leaf dry mass mg.g-1 3839 14764
leaf phosphorus content per leaf area g.m-2 303 532
leaf phosphorus content per leaf dry mass mg.g-1 2050 7437
leaf photosynthetic rate per leaf area µmol.m-2.s-1 1574 4582
leaf photosynthetic rate per leaf dry mass µmol.g-1.s-1 1282 3564
leaf relative growth rate leaf #/leaf #/day 1843
leaf stomatal conductance for H2O per leaf area mol.H2O.m-2.s-1 742 2215
leaf stomatal conductance per leaf area µmol.m-2.s-1 91 446
leaf thickness mm 674 4265
longest whole plant longevity years 655 730
maximum fruit length mm 422 459
maximum leaf length cm 508 558
maximum leaf width cm 496 545
maximum whole plant height m 3152 3722
maximum whole plant longevity years 916 1065
minimum fruit length mm 353 383
minimum leaf length cm 499 549
minimum leaf width cm 494 542
minimum whole plant height m 605 658
plant flowering begin month 4933 13731
plant flowering begin date 4933 13731
plant flowering duration month 1671 1763
plant fruiting duration month 581 631
root dry mass g 399 7307
seed length mm 647 1111
seed mass mg 10256 93543
stem dry mass kg 531 5193
stem relative growth rate cm/cm/day 1843
stem wood density g.cm-3 8183 39162
vessel lumen area mm2 2048 2230
vessel number vessels mm-2 2048 2230
whole plant dispersal syndrome 1265 1324
whole plant growth form 84459 330045
whole plant growth form diversity 67009 67413
whole plant height m 6939 10167913
whole plant primary juvenile period length years 349 375
whole plant sexual system 1294 1348
whole plant vegetative phenology 6443 6706
whole plant woodiness 46410 49060
 

BIEN 4 geovalid occurrence density.

BIEN database current version: 4.1

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