# Betula papyrifera

Betulaceae. 12 equations apply. Each output lists them most specific first: fitted on this species, on a variety of it, pooled fits that included it, then its genus and family. Within each step, equations the authors advised against go last, then those read from compilations; more trees come first. The order shows how specific the evidence is, not which equation predicts best.

## Aboveground biomass

1. Poudel et al. 2019 (this species): Fitted on this species; 23 trees; DBH 4.7–30.6 cm; Read from the original paper.
   - [Paper birch total aboveground biomass from DBH (Table 4)](https://treeallometry.org/equations/poudel-2019-betula-papyrifera/), Poudel et al. 2019: Betula papyrifera, United States; inputs DBH; DBH 4.7–30.6 cm; 23 trees.

2. Flade et al. 2020 (pooled, includes it): Pooled fit on 3 named species and others, this one included; Number of trees not stated; Read from the original paper.
   - [Short-stature boreal trees (<=4.5 m), AGB from stem diameter at 0.3 m (NLS)](https://treeallometry.org/equations/flade-2020-trees-d30-nls/), Flade et al. 2020: Multispecies short-stature trees (Betula papyrifera, Picea spp., Populus balsamifera, Populus tremuloides), Canada; inputs D30.

3. Repola & Ahnlund Ulvcrona 2014 (same genus): Fitted on the genus Betula; 86 trees across all species; DBH 1–11 cm; Read from the original paper.
   - [Birch aboveground biomass, young dense stands, N Sweden (Table 5)](https://treeallometry.org/equations/repola-2014-agb-birch/), Repola & Ahnlund Ulvcrona 2014: Betula, Sweden; inputs DBH + Height; DBH 1–11 cm; 86 trees.

4. Repola 2008 (same genus): Fitted on the genus Betula; 127 trees across all species; DBH 2.5–38 cm; Read from the original paper.
   - [Birch total above-ground biomass excluding foliage, Model 1a (Eq. 11)](https://treeallometry.org/equations/repola-2008-betula-total/), Repola 2008: Betula, Finland; inputs DBH + Height; DBH 2.5–38 cm; 127 trees.

## Stem biomass

1. Flade et al. 2021 (this species): Fitted on this species; 15 trees; Read from the original paper.
   - [Betula papyrifera stem biomass, cross-sectional area at 0.3 m (LLRC)](https://treeallometry.org/equations/flade-2021-bepa-stem-llrc/), Flade et al. 2021: Betula papyrifera, Canada; inputs D30; 15 trees.
   - [Betula papyrifera stem biomass, cross-sectional area at 0.3 m (NLS)](https://treeallometry.org/equations/flade-2021-bepa-stem-nls/), Flade et al. 2021: Betula papyrifera, Canada; inputs D30; 15 trees.

2. Repola & Ahnlund Ulvcrona 2014 (same genus): Fitted on the genus Betula; 86 trees across all species; DBH 1–11 cm; Read from the original paper.
   - [Birch stem biomass, young dense stands, N Sweden (Table 5)](https://treeallometry.org/equations/repola-2014-stem-birch/), Repola & Ahnlund Ulvcrona 2014: Betula, Sweden; inputs DBH + Height; DBH 1–11 cm; 86 trees.

## Branch biomass

1. Flade et al. 2021 (this species): Fitted on this species; 15 trees; Read from the original paper.
   - [Betula papyrifera branch biomass, cross-sectional area at 0.3 m (LLRC)](https://treeallometry.org/equations/flade-2021-bepa-branch-llrc/), Flade et al. 2021: Betula papyrifera, Canada; inputs D30; 15 trees.
   - [Betula papyrifera branch biomass, cross-sectional area at 0.3 m (NLS)](https://treeallometry.org/equations/flade-2021-bepa-branch-nls/), Flade et al. 2021: Betula papyrifera, Canada; inputs D30; 15 trees.

2. Repola & Ahnlund Ulvcrona 2014 (same genus): Fitted on the genus Betula; 86 trees across all species; DBH 1–11 cm; Read from the original paper.
   - [Birch living branch biomass, young dense stands, N Sweden (Table 5)](https://treeallometry.org/equations/repola-2014-branch-birch/), Repola & Ahnlund Ulvcrona 2014: Betula, Sweden; inputs DBH + Height; DBH 1–11 cm; 86 trees.

## Foliage biomass

1. Flade et al. 2021 (this species): Fitted on this species; 15 trees; Read from the original paper.
   - [Betula papyrifera leaf biomass, cross-sectional area at 0.3 m (NLS)](https://treeallometry.org/equations/flade-2021-bepa-leaf-nls/), Flade et al. 2021: Betula papyrifera, Canada; inputs D30; 15 trees.

2. Repola & Ahnlund Ulvcrona 2014 (same genus): Fitted on the genus Betula; 86 trees across all species; DBH 1–11 cm; Read from the original paper.
   - [Birch foliage biomass, young dense stands, N Sweden (Table 5)](https://treeallometry.org/equations/repola-2014-foliage-birch/), Repola & Ahnlund Ulvcrona 2014: Betula, Sweden; inputs DBH; DBH 1–11 cm; 86 trees.