Abstract
Abstract We evaluated how three co‐occurring tree and four grassland species influence potentially harvestable biofuel stocks and above‐ and belowground carbon pools. After 5 years, the tree Pinus strobus had 6.5 times the amount of aboveground harvestable biomass as another tree Quercus ellipsoidalis and 10 times that of the grassland species. P. strobus accrued the largest total plant carbon pool (1375 g C m −2 or 394 g C m −2 yr), while Schizachyrium scoparium accrued the largest total plant carbon pool among the grassland species (421 g C m −2 or 137 g C m −2 yr). Quercus ellipsoidalis accrued 850 g C m −2 , Q. macrocarpa 370 g C m −2 , Poa pratensis 390 g C m −2 , Solidago canadensis 132 g C m −2 , and Lespedeza capitata 283 g C m −2 . Only P. strobus and Q. ellipsoidalis significantly sequestered carbon during the experiment. Species differed in total ecosystem carbon accumulation from −21.3 to +169.8 g C m −2 yr compared with the original soil carbon pool. Plant carbon gains with P. strobus were paralleled by a decrease of 16% in soil carbon and a nonsignificant decline of 9% for Q. ellipsoidalis . However, carbon allocation differed among species, with P. strobus allocating most aboveground in a disturbance prone aboveground pool, whereas Q. ellipsoidalis , allocated most carbon in less disturbance sensitive belowground biomass. These differences have strong implications for terrestrial carbon sequestration and potential biofuel production. For P. strobus , aboveground plant carbon harvest for biofuel would result in no net carbon sequestration as declines in soil carbon offset plant carbon gains. Conversely the harvest of Q. ellipsoidalis aboveground biomass would result in net sequestration of carbon belowground due to its high allocation belowground, but would yield lower amounts of aboveground biomass. Our results demonstrate that plant species can differentially impact ecosystem carbon pools and the distribution of carbon above and belowground.
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Claims 17
Claim · model-written summary
After five years Pinus strobus had 6.5 times the harvestable aboveground biomass of Quercus ellipsoidalis.
- Taxon
- Pinus strobus
_-_Killarney%2C_Ontario_01.jpg?width=60)
Pinus strobuse0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_-_Killarney%2C_Ontario_01.jpg?width=500)
Verbatim
e0“After 5 years, the tree Pinus strobus had 6.5 times the amount of aboveground harvestable biomass as another tree Quercus ellipsoidalis”
e1“Plant carbon gains with P. strobus were paralleled by a decrease of 16% in soil carbon”
Claim · model-written summary
After five years Pinus strobus had ten times the harvestable aboveground biomass of grassland species.
- Taxon
- Pinus strobusPinus strobuse0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After 5 years, the tree Pinus strobus had 6.5 times the amount of aboveground harvestable biomass as another tree Quercus ellipsoidalis and 10 times that of the grassland species.”
e1“Plant carbon gains with P. strobus were paralleled by a decrease of 16% in soil carbon”
Claim · model-written summary
Pinus strobus accrued the largest total plant carbon pool, 1375 g C per square metre.
- Taxon
- P. strobusPinus strobuse0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P. strobus accrued the largest total plant carbon pool (1375 g C m −2 or 394 g C m −2 yr)”
e1“Plant carbon gains with P. strobus were paralleled by a decrease of 16% in soil carbon”
Claim · model-written summary
Schizachyrium scoparium had the largest grassland total plant carbon pool.
- Taxon
- Schizachyrium scoparium
Schizachyrium scopariume0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Schizachyrium scoparium accrued the largest total plant carbon pool among the grassland species (421 g C m −2 or 137 g C m −2 yr)”
e1“Plant carbon gains with P. strobus were paralleled by a decrease of 16% in soil carbon”
Claim · model-written summary
Quercus ellipsoidalis accrued 850 g C per square metre.
- Taxon
- Quercus ellipsoidalis
Quercus ellipsoidalise0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Quercus ellipsoidalis accrued 850 g C m −2”
e1“Plant carbon gains with P. strobus were paralleled by a decrease of 16% in soil carbon”
Claim · model-written summary
Quercus macrocarpa accrued 370 g C per square metre.
- Taxon
- Q. macrocarpa
Quercus macrocarpae0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Q. macrocarpa 370 g C m −2”
e1“Plant carbon gains with P. strobus were paralleled by a decrease of 16% in soil carbon”
Claim · model-written summary
Poa pratensis accrued 390 g C per square metre.
- Taxon
- Poa pratensis
.jpg?width=60)
Poa pratensise0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Poa pratensis 390 g C m −2”
e1“Plant carbon gains with P. strobus were paralleled by a decrease of 16% in soil carbon”
Claim · model-written summary
Solidago canadensis accrued 132 g C per square metre.
- Taxon
- Solidago canadensis
Solidago canadensise0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Solidago canadensis 132 g C m −2”
e1“Plant carbon gains with P. strobus were paralleled by a decrease of 16% in soil carbon”
Claim · model-written summary
Lespedeza capitata accrued 283 g C per square metre.
- Taxon
- Lespedeza capitata
Lespedeza capitatae0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lespedeza capitata 283 g C m −2”
e1“Plant carbon gains with P. strobus were paralleled by a decrease of 16% in soil carbon”
Claim · model-written summary
Pinus strobus and Quercus ellipsoidalis were the only species with significant carbon sequestration.
- Taxon
- P. strobus and Q. ellipsoidalisPinus strobusQuercus ellipsoidalise0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Only P. strobus and Q. ellipsoidalis significantly sequestered carbon during the experiment.”
e1“Plant carbon gains with P. strobus were paralleled by a decrease of 16% in soil carbon”
Claim · model-written summary
Total ecosystem carbon accumulation varied across species from −21.3 to +169.8 g C per square metre per year.
Verbatim
e0“Species differed in total ecosystem carbon accumulation from −21.3 to +169.8 g C m −2 yr compared with the original soil carbon pool.”
e1“Plant carbon gains with P. strobus were paralleled by a decrease of 16% in soil carbon”
Claim · model-written summary
Pinus strobus plant carbon gains coincided with a 16% decrease in soil carbon.
- Taxon
- P. strobusPinus strobuse0e1
Not reportedSetting
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant carbon gains with P. strobus were paralleled by a decrease of 16% in soil carbon”
e1“Plant carbon gains with P. strobus were paralleled by a decrease of 16% in soil carbon”
Claim · model-written summary
Quercus ellipsoidalis plant carbon gains coincided with a nonsignificant 9% soil carbon decline.
- Taxon
- Q. ellipsoidalisQuercus ellipsoidalise0e1
Not reportedSetting
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a nonsignificant decline of 9% for Q. ellipsoidalis”
e1“Plant carbon gains with P. strobus were paralleled by a decrease of 16% in soil carbon”
Claim · model-written summary
Pinus strobus allocated most carbon aboveground.
- Taxon
- P. strobusPinus strobuse0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P. strobus allocating most aboveground in a disturbance prone aboveground pool”
e1“Plant carbon gains with P. strobus were paralleled by a decrease of 16% in soil carbon”
Claim · model-written summary
Quercus ellipsoidalis allocated most carbon to belowground biomass.
- Taxon
- Q. ellipsoidalisQuercus ellipsoidalise0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Q. ellipsoidalis , allocated most carbon in less disturbance sensitive belowground biomass.”
e1“Plant carbon gains with P. strobus were paralleled by a decrease of 16% in soil carbon”
Claim · model-written summary
Harvesting Pinus strobus aboveground biomass for biofuel would leave no net carbon sequestration because soil carbon declines offset plant carbon gains.
- Taxon
- P. strobusPinus strobuse0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For P. strobus , aboveground plant carbon harvest for biofuel would result in no net carbon sequestration as declines in soil carbon offset plant carbon gains.”
e1“Plant carbon gains with P. strobus were paralleled by a decrease of 16% in soil carbon”
Claim · model-written summary
Harvesting Quercus ellipsoidalis aboveground biomass would yield net belowground carbon sequestration but less aboveground biomass.
- Taxon
- Q. ellipsoidalisQuercus ellipsoidalise0e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Conversely the harvest of Q. ellipsoidalis aboveground biomass would result in net sequestration of carbon belowground due to its high allocation belowground, but would yield lower amounts of aboveground biomass.”
e1“Plant carbon gains with P. strobus were paralleled by a decrease of 16% in soil carbon”