OHara1995
Data contributor: Kevin L. O'Hara
Email: [email protected]
Address:
- Dept of Environmental Science, Policy, & Management, University of California, Berkeley, CA 94720, USA
Citation: O'Hara KL and Valappil NI (1995). 'Sapwood-leaf area prediction equations for multi-aged ponderosa pine stands in western Montana and central Oregon.' Canadian Journal of Forest Research, 25(9), pp. 1553-1557.
DOI: 10.1139/x95-169
Abstract: Ponderosa pine (Pinusponderosa Dougl. ex Laws.) frequently grows in pure, multi-aged stands throughout its range. Sapwood-leaf area prediction equations were developed for multi-aged, multi-strata ponderosa pine stands in western Montana and central Oregon. No significant differences were found between equations for trees from lower or upper strata, or between equations for all trees and equations for upper or lower strata trees in either study location. These results indicate overstory ponderosa pine trees do not require significantly greater sapwood conducting tissue per unit of leaf area than understory trees. Single variable models using only sapwood area at breast height are recommended.
The dataset includes records for 114 individuals from 1 species belonging to 1 family(ies), presenting 1 functional type(s), growing in 1 condition(s) within 1 major type(s) of habitat, with data included for the following variables:
| Variable | Label | Units | N | Min | Median | Max |
|---|---|---|---|---|---|---|
| latitude | Latitude | deg | 114 | 44 | 44 | 47 |
| longitude | Longitude | deg | 114 | -122 | -122 | -114 |
| a.lf | Leaf area | m2 | 114 | 0.4 | 21 | 370 |
| a.ssbh | Sapwood area at breast height | m2 | 114 | 0.000075 | 0.0053 | 0.09 |
| a.stbh | Stem area at breast height | m2 | 114 | 0.00013 | 0.0096 | 0.12 |
| h.t | Height | m | 114 | 1.7 | 6.7 | 22 |
| h.c | Height to crown base | m | 114 | 0.14 | 2.1 | 9.9 |
| d.bh | Dbh | m | 114 | 0.013 | 0.11 | 0.39 |
| h.bh | Height of d.bh measurement | m | 114 | 1.4 | 1.4 | 1.4 |
| c.d | Crown depth | m | 114 | 0.81 | 4.4 | 17 |
And locally within the country:
The sites sampled are:
| Location | Longitude | Latitude | Vegetation |
|---|---|---|---|
| western Montana, USA | -113.984 | 46.858 | Temperate forest |
| central Oregon, USA | -121.627 | 43.710 | Temperate forest |
The growing conditions of sampled plants was:
| Location | Grouping | growingCondition |
|---|---|---|
| western Montana, USA | habitat = ; strata = C | field wild |
| western Montana, USA | habitat = pse/vac; strata = D | field wild |
| western Montana, USA | habitat = ; strata = D | field wild |
| western Montana, USA | habitat = "; strata = C | field wild |
| western Montana, USA | habitat = pse/sya; strata = D | field wild |
| western Montana, USA | habitat = (lick creek); strata = D | field wild |
| western Montana, USA | habitat = "; strata = B | field wild |
| western Montana, USA | habitat = pse/sya; strata = C | field wild |
| western Montana, USA | habitat = thinning demonstration; strata = C | field wild |
| western Montana, USA | habitat = (lick creek); strata = C | field wild |
| western Montana, USA | habitat = pse/sya/caru; strata = C | field wild |
| western Montana, USA | habitat = pse/vac; strata = C | field wild |
| western Montana, USA | habitat = ; strata = B | field wild |
| western Montana, USA | habitat = pse/sya; strata = B | field wild |
| western Montana, USA | habitat = pse/sya/caru; strata = B | field wild |
| western Montana, USA | habitat = pse/sya; strata = A | field wild |
| western Montana, USA | habitat = psme/syal/syal; strata = B | field wild |
| western Montana, USA | habitat = ; strata = A | field wild |
| western Montana, USA | habitat = psme/syal/syal; strata = A | field wild |
| central Oregon, USA | habitat = Pp/Bp/Ng; strata = D | field wild |
| central Oregon, USA | habitat = Pp/pg; strata = D | field wild |
| central Oregon, USA | habitat = psme/cage; strata = C | field wild |
| central Oregon, USA | habitat = Pp/Bb-menz/Ng; strata = C | field wild |
| central Oregon, USA | habitat = Pb/Bb/F; strata = D | field wild |
| central Oregon, USA | habitat = Psme/pg; strata = D | field wild |
| central Oregon, USA | habitat = Pp/Bb/Ng; strata = D | field wild |
| central Oregon, USA | habitat = Pp/Bb-menz/Ng; strata = D | field wild |
| central Oregon, USA | habitat = Pp/pg; strata = C | field wild |
| central Oregon, USA | habitat = Pp/Bb/F; strata = D | field wild |
| central Oregon, USA | habitat = Pp/Bb/Ng; strata = C | field wild |
| central Oregon, USA | habitat = psme/pg; strata = D | field wild |
| central Oregon, USA | habitat = Pb/Bb/F; strata = C | field wild |
| central Oregon, USA | habitat = psme/cage; strata = D | field wild |
| central Oregon, USA | habitat = Psme/pg; strata = C | field wild |
| central Oregon, USA | habitat = Pp/pg; strata = B | field wild |
| central Oregon, USA | habitat = Pp/Bb/F; strata = C | field wild |
| central Oregon, USA | habitat = Pp/Bp/Ng; strata = C | field wild |
| central Oregon, USA | habitat = Pp/Bb-menz/Ng; strata = B | field wild |
| central Oregon, USA | habitat = psme/pg; strata = C | field wild |
| central Oregon, USA | habitat = Pp/Bb/Ng; strata = B | field wild |
| central Oregon, USA | habitat = Pp/Bb/F; strata = B | field wild |
| central Oregon, USA | habitat = Psme/pg; strata = B | field wild |
| central Oregon, USA | habitat = Pb/Bb/F; strata = B | field wild |
| central Oregon, USA | habitat = psme/cage; strata = B | field wild |
| central Oregon, USA | habitat = Pp/Bp/Ng; strata = B | field wild |
| Species | Family | Pft |
|---|---|---|
| Pinus ponderosa | Pinaceae | evergreen gymnosperm |
Sampling strategy: Sampling in two locations with similar methods. Trees from range of crown class and canopy strata were selected.
Leaf area: Leaf surface area was estimated with submersion method.
Other variables: Sapwood was measured immediately after cutting.
Year collected: 1994
This is how the study OHara1995 fits in the entire dataset (grey). each colour represents a species. A legend of species names with colours is included at the end for reports with 1 < n < 20 species.
