Postglacial vegetation, fire, and climate history of Blacktail Pond, Northern Yellowstone National Park, WY
Previous studies in Yellowstone National Park (YNP) suggest intensification of the summer-dry and summer-wet patterns in Yellowstone during the early Holocene when increased summer insolation caused atmospheric circulation patterns to strengthen. To examine this hypothesis further, pollen and high-r...
Main Author: | |
---|---|
Other Authors: | |
Format: | Thesis |
Language: | English |
Published: |
Montana State University - Bozeman, College of Letters & Science
2008
|
Subjects: | |
Online Access: | https://scholarworks.montana.edu/xmlui/handle/1/1520 |
id |
ftmontanastateu:oai:scholarworks.montana.edu:1/1520 |
---|---|
record_format |
openpolar |
spelling |
ftmontanastateu:oai:scholarworks.montana.edu:1/1520 2023-05-15T18:40:42+02:00 Postglacial vegetation, fire, and climate history of Blacktail Pond, Northern Yellowstone National Park, WY Huerta, Mariana Angelica Chairperson, Graduate Committee: Cathy Whitlock Blacktail Pond (Wyo.) 2008 application/pdf https://scholarworks.montana.edu/xmlui/handle/1/1520 en eng Montana State University - Bozeman, College of Letters & Science https://scholarworks.montana.edu/xmlui/handle/1/1520 Copyright 2008 by Mariana Angelica Huerta Paleobotany Fossils Pollen Paleoecology--Holocene Thesis 2008 ftmontanastateu 2022-06-06T07:26:13Z Previous studies in Yellowstone National Park (YNP) suggest intensification of the summer-dry and summer-wet patterns in Yellowstone during the early Holocene when increased summer insolation caused atmospheric circulation patterns to strengthen. To examine this hypothesis further, pollen and high-resolution charcoal records were analyzed from Blacktail Pond to reconstruct fire and vegetation histories near the present transition between summer-wet and summer-dry conditions. The site currently lies in Pseudotsuga parkland with Artemisia steppe at lower elevations around the pond. The site supported sparse tundra prior to 12,000 cal yr B.P. and fires were uncommon. Between 12,000 and 11,000 cal yr B.P, fire activity increased and Picea-Pinus parkland was established. These changes are consistent with increasing temperature and moisture. Between 11,000 and 7600 cal yr B.P., pollen evidence of a Pinus-Picea-Abies forest is consistent with increased winter moisture, while high fire activity at this time indicates that summers had lower effective moisture than at present. Between 7600 and 4000 cal yr B.P., vegetation around the site shifted to parkland dominated by Pinus, Picea, Pseudotsuga, and Artemisia indicating that effective winter moisture decreased. Fire activity continued to be high during this time suggesting summers maintained low effective moisture. The development of Artemisia steppe around the site over the last 4000 years indicates that effective winter moisture decreased, while decreased fire activity indicates that effective summer moisture increased during this time. Winter conditions during the early Holocene that resemble a summer-wet site along with summer conditions at the same time resembling a summer-dry site could be a result of the geographical setting of Blacktail Pond near the boundary between these two precipitation regimes. Poaceae/Artemisia pollen ratios were used to infer wet/dry climate oscillations during the late Holocene. The fluctuations correspond well with other paleoclimate ... Thesis Tundra Montana State University (MSU): ScholarWorks Parkland ENVELOPE(-120.570,-120.570,55.917,55.917) |
institution |
Open Polar |
collection |
Montana State University (MSU): ScholarWorks |
op_collection_id |
ftmontanastateu |
language |
English |
topic |
Paleobotany Fossils Pollen Paleoecology--Holocene |
spellingShingle |
Paleobotany Fossils Pollen Paleoecology--Holocene Huerta, Mariana Angelica Postglacial vegetation, fire, and climate history of Blacktail Pond, Northern Yellowstone National Park, WY |
topic_facet |
Paleobotany Fossils Pollen Paleoecology--Holocene |
description |
Previous studies in Yellowstone National Park (YNP) suggest intensification of the summer-dry and summer-wet patterns in Yellowstone during the early Holocene when increased summer insolation caused atmospheric circulation patterns to strengthen. To examine this hypothesis further, pollen and high-resolution charcoal records were analyzed from Blacktail Pond to reconstruct fire and vegetation histories near the present transition between summer-wet and summer-dry conditions. The site currently lies in Pseudotsuga parkland with Artemisia steppe at lower elevations around the pond. The site supported sparse tundra prior to 12,000 cal yr B.P. and fires were uncommon. Between 12,000 and 11,000 cal yr B.P, fire activity increased and Picea-Pinus parkland was established. These changes are consistent with increasing temperature and moisture. Between 11,000 and 7600 cal yr B.P., pollen evidence of a Pinus-Picea-Abies forest is consistent with increased winter moisture, while high fire activity at this time indicates that summers had lower effective moisture than at present. Between 7600 and 4000 cal yr B.P., vegetation around the site shifted to parkland dominated by Pinus, Picea, Pseudotsuga, and Artemisia indicating that effective winter moisture decreased. Fire activity continued to be high during this time suggesting summers maintained low effective moisture. The development of Artemisia steppe around the site over the last 4000 years indicates that effective winter moisture decreased, while decreased fire activity indicates that effective summer moisture increased during this time. Winter conditions during the early Holocene that resemble a summer-wet site along with summer conditions at the same time resembling a summer-dry site could be a result of the geographical setting of Blacktail Pond near the boundary between these two precipitation regimes. Poaceae/Artemisia pollen ratios were used to infer wet/dry climate oscillations during the late Holocene. The fluctuations correspond well with other paleoclimate ... |
author2 |
Chairperson, Graduate Committee: Cathy Whitlock |
format |
Thesis |
author |
Huerta, Mariana Angelica |
author_facet |
Huerta, Mariana Angelica |
author_sort |
Huerta, Mariana Angelica |
title |
Postglacial vegetation, fire, and climate history of Blacktail Pond, Northern Yellowstone National Park, WY |
title_short |
Postglacial vegetation, fire, and climate history of Blacktail Pond, Northern Yellowstone National Park, WY |
title_full |
Postglacial vegetation, fire, and climate history of Blacktail Pond, Northern Yellowstone National Park, WY |
title_fullStr |
Postglacial vegetation, fire, and climate history of Blacktail Pond, Northern Yellowstone National Park, WY |
title_full_unstemmed |
Postglacial vegetation, fire, and climate history of Blacktail Pond, Northern Yellowstone National Park, WY |
title_sort |
postglacial vegetation, fire, and climate history of blacktail pond, northern yellowstone national park, wy |
publisher |
Montana State University - Bozeman, College of Letters & Science |
publishDate |
2008 |
url |
https://scholarworks.montana.edu/xmlui/handle/1/1520 |
op_coverage |
Blacktail Pond (Wyo.) |
long_lat |
ENVELOPE(-120.570,-120.570,55.917,55.917) |
geographic |
Parkland |
geographic_facet |
Parkland |
genre |
Tundra |
genre_facet |
Tundra |
op_relation |
https://scholarworks.montana.edu/xmlui/handle/1/1520 |
op_rights |
Copyright 2008 by Mariana Angelica Huerta |
_version_ |
1766230105140494336 |