Differentiating climatic and successional influences on long-term development of a marsh

Singer, D K; Jackson, S T; Madsen, B J; Wilcox, D A

doi:10.2307/2265782

Title: Differentiating climatic and successional influences on long-term development of a marsh

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Abstract

Comparison of long-term records of local wetland vegetation dynamics with regional, climate-forced terrestrial vegetation changes can be used to differentiate the rates and effects of autogenic successional processes and allogenic environmental change on wetland vegetation dynamics. We studied Holocene plant macrofossil and pollen sequences from Portage Marsh, a shallow, 18-ha marsh in northeastern Indiana. Between 10 000 and 5700 yr BP the basin was occupied by a shallow, open lake, while upland vegetation consisted of mesic forests of Pinus, Quercus, Ulmus, and Carya. At 5700 yr BP the open lake was replaced rapidly by a shallow marsh, while simultaneously Quercus savanna developed on the surrounding uplands. The marsh was characterized by periodic drawdowns, and the uplands by periodic fires. Species composition of the marsh underwent further changes between 3000 and 2000 yr BP. Upland pollen spectra at Portage Marsh and other sites in the region shifted towards more mesic vegetation during that period. The consistency and temporal correspondence between the changes in upland vegetation and marsh vegetation indicate that the major vegetational changes in the marsh during the Holocene resulted from hydrologic changes forced by regional climate change. Progressive shallowing of the basin by autogenic accumulation of organic sediment constrainedmore »« less

Authors:

Singer, D K; Jackson, S T ^[1]; Madsen, B J; Wilcox, D A ^[2]

Northern Arizona Univ., Flagstaff, AZ (United States)
Great Lakes Science Center, Ann Arbor, MI (United States)

Publication Date:: Sun Sep 01 00:00:00 EDT 1996

Sponsoring Org.:: USDOE

OSTI Identifier:: 513387

Resource Type:: Journal Article

Journal Name:: Ecology

Additional Journal Information:: Journal Volume: 77; Journal Issue: 6; Other Information: PBD: Sep 1996

Country of Publication:: United States

Language:: English

Subject:: 54 ENVIRONMENTAL SCIENCES; POPULATION DYNAMICS; RESPONSE MODIFYING FACTORS; WETLANDS; ECOLOGICAL SUCCESSION; CLIMATES

Citation Formats


                    Singer, D K, Jackson, S T, Madsen, B J, and Wilcox, D A. Differentiating climatic and successional influences on long-term development of a marsh.  United States: N. p., 1996. 
        Web.  doi:10.2307/2265782.

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                    Singer, D K, Jackson, S T, Madsen, B J, & Wilcox, D A. Differentiating climatic and successional influences on long-term development of a marsh.  United States.  https://doi.org/10.2307/2265782

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                    Singer, D K, Jackson, S T, Madsen, B J, and Wilcox, D A. 1996.  
        "Differentiating climatic and successional influences on long-term development of a marsh".  United States.  https://doi.org/10.2307/2265782.

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@article{osti_513387,

  title        = {Differentiating climatic and successional influences on long-term development of a marsh},

  author       = {Singer, D K and Jackson, S T and Madsen, B J and Wilcox, D A},

  abstractNote = {Comparison of long-term records of local wetland vegetation dynamics with regional, climate-forced terrestrial vegetation changes can be used to differentiate the rates and effects of autogenic successional processes and allogenic environmental change on wetland vegetation dynamics. We studied Holocene plant macrofossil and pollen sequences from Portage Marsh, a shallow, 18-ha marsh in northeastern Indiana. Between 10 000 and 5700 yr BP the basin was occupied by a shallow, open lake, while upland vegetation consisted of mesic forests of Pinus, Quercus, Ulmus, and Carya. At 5700 yr BP the open lake was replaced rapidly by a shallow marsh, while simultaneously Quercus savanna developed on the surrounding uplands. The marsh was characterized by periodic drawdowns, and the uplands by periodic fires. Species composition of the marsh underwent further changes between 3000 and 2000 yr BP. Upland pollen spectra at Portage Marsh and other sites in the region shifted towards more mesic vegetation during that period. The consistency and temporal correspondence between the changes in upland vegetation and marsh vegetation indicate that the major vegetational changes in the marsh during the Holocene resulted from hydrologic changes forced by regional climate change. Progressive shallowing of the basin by autogenic accumulation of organic sediment constrained vegetational responses to climate change but did not serve as the direct mechanism of change. 84 refs., 7 figs., 2 tabs.},

  doi          = {10.2307/2265782},

  url          = {https://www.osti.gov/biblio/513387},
  journal      = {Ecology},
number       = 6,

  volume       = 77,

  place        = {United States},

  year         = {Sun Sep 01 00:00:00 EDT 1996},

  month        = {Sun Sep 01 00:00:00 EDT 1996}

}

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