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Sensitivity of wetland hydrology to external climate forcing in central Florida. / Lammertsma, Emmy I.; Donders, Timme H.; Pearce, Christof et al.
In: Quaternary Research, Vol. 84, No. 3, 2015, p. 287-300.Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review
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TY - JOUR
T1 - Sensitivity of wetland hydrology to external climate forcing in central Florida
AU - Lammertsma, Emmy I.
AU - Donders, Timme H.
AU - Pearce, Christof
AU - Cremer, Holger
AU - Gaiser, Evelyn E.
AU - Wagner-Cremer, Friederike
PY - 2015
Y1 - 2015
N2 - Available proxy records from the Florida peninsula give a varying view on hydrological changes during the late Holocene. Here we evaluate the consistency and sensitivity of local wetland records in relation to hydrological changes over the past ~. 5. ka based on pollen and diatom proxies from peat cores in Highlands Hammock State Park, central Florida. Around 5. cal. ka BP, a dynamic floodplain environment is present. Subsequently, a wetland forest establishes, followed by a change to persistent wet conditions between ~. 2.5 and 2.0. ka. Long hydroperiods remain despite gradual succession and basin infilling with maximum wet conditions between ~. 1.3 and 1.0. ka. The wet phase and subsequent strong drying over the last millennium, as indicated by shifts in both pollen and diatom assemblages, can be linked to the early Medieval Warm Period and Little Ice Age, respectively, driven by regionally higher sea-surface temperatures and a temporary northward migration of the Intertropical Convergence Zone. Changes during the 20th century are the result of constructions intended to protect the Highlands Hammock State Park from wildfires. The multiple cores and proxies allow distinguishing local and regional hydrological changes. The peat records reflect relatively subtle climatic changes that are not evident from regional pollen records from lakes.
AB - Available proxy records from the Florida peninsula give a varying view on hydrological changes during the late Holocene. Here we evaluate the consistency and sensitivity of local wetland records in relation to hydrological changes over the past ~. 5. ka based on pollen and diatom proxies from peat cores in Highlands Hammock State Park, central Florida. Around 5. cal. ka BP, a dynamic floodplain environment is present. Subsequently, a wetland forest establishes, followed by a change to persistent wet conditions between ~. 2.5 and 2.0. ka. Long hydroperiods remain despite gradual succession and basin infilling with maximum wet conditions between ~. 1.3 and 1.0. ka. The wet phase and subsequent strong drying over the last millennium, as indicated by shifts in both pollen and diatom assemblages, can be linked to the early Medieval Warm Period and Little Ice Age, respectively, driven by regionally higher sea-surface temperatures and a temporary northward migration of the Intertropical Convergence Zone. Changes during the 20th century are the result of constructions intended to protect the Highlands Hammock State Park from wildfires. The multiple cores and proxies allow distinguishing local and regional hydrological changes. The peat records reflect relatively subtle climatic changes that are not evident from regional pollen records from lakes.
KW - Central Florida
KW - Diatoms
KW - Hydroperiod
KW - Late Holocene
KW - Pollen
KW - Precipitation variability
KW - Wetland
UR - http://www.scopus.com/inward/record.url?scp=84951073227&partnerID=8YFLogxK
U2 - 10.1016/j.yqres.2015.09.003
DO - 10.1016/j.yqres.2015.09.003
M3 - Journal article
AN - SCOPUS:84951073227
VL - 84
SP - 287
EP - 300
JO - Quaternary Research
JF - Quaternary Research
SN - 0033-5894
IS - 3
ER -