1 Introduction
- Five taxonomic groups (mammals, birds, reptiles, amphibians, and vascular plants), along with all taxonomic groups but vascular plants (aggregated); and
- Different geographical resolutions (804 terrestrial ecoregions (Olson et al. 2001), country average, world average).
2 Methods
2.1 Goal of LCA case study
2.2 Product studied and functional unit
2.3 System boundaries
2.4 Data collection and assumptions
2.4.1 Main data sources
2.4.2 Occupation profile
Fiber type | Management intensity profile | Sources/comment | ||
---|---|---|---|---|
Low (%) | Medium (%) | High (%) | ||
Logs, northern hardwood (LNH) | 59 | 25 | 16 | Management intensities were derived from US LCI database (pulpwood, hardwood, average, at forest road, NE-NC), occupation profile from CORRIM (Johnson et al. 2004) |
Chips, northern hardwood (CNH) | ||||
Logs, southern hardwood (LSH) | 0 | 100 | 0 | No data were available from US LCI and CORRIM for southern hardwood logs. Hence, medium management intensity was assumed. To obtain the occupation profile, average yield value from and a rotation age of 50 years was assumed based on data from FIA (Miles 2015) |
Chips, southern hardwood (CSH) | ||||
Logs, southern softwood (LSS) | 37 | 58 | 5 | Management intensities were derived from US LCI database (softwood logs with bark, harvested at average intensity site, at mill, US SE), occupation profile from CORRIM (Johnson et al. 2004) |
Chips, southern softwood (CSS) | ||||
Logs, northern softwood (LNS) | 45 | 36 | 19 | Management intensities were derived from US LCI database (pulpwood, softwood, average, at forest road, NE-NC), occupation profile from CORRIM (Oneil et al. 2010) |
Chips, northern softwood (CNS) |
Ecoregion | % of total fiber | |
---|---|---|
No. | Name | |
Eastern US | ||
NA0402 | Appalachian mixed mesophytic forests | 7.5 |
NA0403 | Appalachian-Blue Ridge forests | 5.7 |
NA0409 | Mississippi lowland forests | 8.8 |
NA0413 | Southeastern mixed forests | 20.3 |
NA0513 | Florida sand pine scrub | 1.5 |
NA0517 | Middle Atlantic coastal forests | 8.9 |
NA0523 | Piney Woods forests | 12.3 |
NA0529 | Southeastern conifer forests | 15.4 |
Central US | ||
NA0405 | East Central Texas forests | 1.9 |
NA0412 | Ozark Mountain forests | 2.3 |
NA0414 | Southern Great Lakes forests | 1.2 |
NA0415 | Upper Midwest forest-savanna transition | 1.4 |
NA0416 | Western Great Lakes forests | 1.7 |
Western US | ||
NA0417 | Willamette Valley forests | 1.6 |
NA0506 | British Columbia mainland coastal forests | 0.2 |
NA0507 | Cascade Mountains leeward forests | 0.2 |
NA0508 | Central and Southern Cascades forests | 1.6 |
NA0510 | Central Pacific coastal forests | 1.6 |
NA0512 | Eastern Cascades forests | 1.0 |
NA0516 | Klamath-Siskiyou | 0.6 |
NA0524 | Puget lowland forests | 0.6 |
2.4.3 Impact assessment
2.5 Interpretation of the results
2.5.1 Contribution analyses
2.5.2 Scenario analysis
Scenario set | Fiber consumption | Geographical resolution | Ecoregions included in a given mill’s fiber basket | Management intensity |
---|---|---|---|---|
Base case | Based on data collected from the containerboard mills (F100) | Ecoregion-specific (ER) | All wood supplying ecoregions located within a 150-km radius of a given mill (ALL) | Based on data collected from the containerboard mills and the US LCI database (AVG) |
Analysis of improvement opportunities | 10% reduction in fiber use (F90) | Same as base case | ||
Same as base case | Move a given mill fiber sourcing to ecoregion with less sensitivity to the plant indicator (plant) within the same fiber basin | Same as base case | ||
Same as base case | Move a given mill fiber sourcing to ecoregion with less sensitivity to the bird indicator (bird) within the same fiber basin | Same as base case | ||
Same as base case | Move a given mill fiber sourcing to ecoregion with less sensitivity to the taxa-aggregated indicator (TA) within the same fiber basin | Same as base case | ||
Same as base case | Assume all fiber comes from extensive management intensity (EXT) | |||
Same as base case | Assume all fiber comes from intensive management intensity (INT) | |||
Evaluation of choices made in developing the CFs | Same as base case | Move fiber sourcing in ecoregion described as having the least habitat loss* (HL) within the 150-km radius | Same as base case |
2.5.3 Uncertainty analysis
3 Results and interpretation
3.1 Contribution analysis
3.1.1 Life cycle stages
Indicator | Fiber procurement (%) | Containerboard production (%) | Converting (%) |
---|---|---|---|
“Potential Species Loss”—taxa-aggregated | 90.6 | 9.2 | 0.3 |
“Potential Species Loss”—mammals | 95.9 | 3.9 | 0.2 |
“Potential Species Loss”—birds | 86.9 | 12.8 | 0.3 |
“Potential Species Loss”—vascular plants | 80.3 | 19.0 | 0.6 |
“Potential Species Loss”—amphibians | 93.9 | 6.0 | 0.1 |
“Potential Species Loss”—reptiles | 92.0 | 7.8 | 0.2 |
Land competition | 90.5 | 9.4 | 0.2 |
3.1.2 Taxonomic groups
3.1.3 Contribution and sensitivity of the different ecoregions to the fiber procurement results
Ecoregion | % of total fiber (mass basis) | “Potential Species Loss” indicator | ||||||
---|---|---|---|---|---|---|---|---|
No. | Name | Taxa-aggregated (%) | Mammals (%) | Birds (%) | Vascular plants (%) | Amphibians (%) | Reptiles (%) | |
Eastern US | ||||||||
NA0402 | Appalachian mixed mesophytic forests | 7.5 | 9.1 | |||||
NA0403 | Appalachian-Blue Ridge forests | 5.7 | 10.3 | 24.6 | ||||
NA0409* | Mississippi lowland forests | 8.8 | 10.1 | |||||
NA0413* | Southeastern mixed forests | 20.3 | 11.6 | 8.4 | 18.6 | 8.5 | 10.8 | 9.9 |
NA0513 | Florida sand pine scrub | 1.5 | 7.3 | |||||
NA0517* | Middle Atlantic coastal forests | 8.9 | 8.7 | 10.9 | 9.7 | 9.0 | 6.7 | 8.2 |
NA0523* | Piney Woods forests | 12.3 | 7.5 | 7.7 | 10.0 | 19.1 | ||
NA0529* | Southeastern conifer forests | 15.4 | 16.1 | 12.4 | 14.2 | 13.7 | 15.9 | 30.0 |
Western US | ||||||||
NA0417 | Willamette Valley forests | 1.6 | 19.1 | |||||
NA0510 | Central Pacific coastal forests | 1.6 | 9.1 | 4.5 |
- 11.9, 5.6, and 4.05, respectively for mammals in the Willamette Valley forests (NA0417), the Central Pacific coastal forests (NA0510), and the Central and Southern Cascades forests (NA0508);
- 4.9 for reptiles in the Florida sand pine (Pinus clausa) scrub (NA0513); and
- 4.3 for amphibians in the Appalachian-Blue Ridge forests (NA0403).
- Across all ecoregions included in this study, birds showed less sensitivity to forest management than other species;
- The highest and most variable average sensitivity observed was in the Western ecoregions especially for mammals; and
- Central and eastern ecoregions showed less sensitivity to species across taxonomic groups and ecoregions.