Re-Examination of an 85-Year-Old Peat Core from Bacon's Swamp Reveals New Understanding of the Natural History of Indiana's Southernmost “Sphagnum Bog”

IF 0.5 4区环境科学与生态学 Q4 BIODIVERSITY CONSERVATION

Northeastern Naturalist Pub Date : 2023-06-15 DOI:10.1656/045.030.0205

A. L. Swinehart, Carlyn M. Hubbard

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Abstract

Abstract - Historic Bacon's Swamp in Indianapolis is commonly regarded as the southernmost Sphagnum-dominated peatland in Indiana. Although pollen analyses have been published, no previous macrofossil investigations have been conducted. Recent attempts to retrieve a sediment core to recover macrofossils and study the palaeoecology of historic Bacon's Swamp failed due to the presence of extensive and deep gravel fill overlaying the remaining wetland sediments. Discovery of core samples collected for pollen analysis in 1936, before extensive dredging and filling of the peatland, provided an unusual opportunity to recover macrofossils. Macrofossils were remarkably well-preserved, despite having been dried for nearly 85 years. Those identified in this study indicate that the ecological succession of Bacon's Swamp was markedly different than previously reported. Changes in local or regional hydrology are evident and may have controlled the onset of developmental stages. Contrary to a previous published account, Sphagnum appears to have been a relatively recent pioneer in Bacon's Swamp rather than a long-term component of the flora.

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重新检查培根沼泽中一个85年前的泥炭核，揭示了对印第安纳州最南端“泥炭沼泽”自然历史的新认识

摘要-印第安纳波利斯历史悠久的培根沼泽通常被认为是印第安纳州最南端的泥炭地。尽管花粉分析已经发表，但以前没有进行过大型化石调查。最近，由于剩余的湿地沉积物上覆盖着广泛而深的砾石填充物，试图取回沉积物岩芯以回收大型化石并研究历史悠久的培根沼泽的古生态的尝试失败了。1936年，在泥炭地进行大规模疏浚和填充之前，发现了用于花粉分析的岩芯样本，这为回收大型化石提供了一个不同寻常的机会。尽管大化石已经干燥了近85年，但它们保存得非常完好。这项研究表明，培根沼泽的生态演替与之前报道的明显不同。当地或区域水文的变化是明显的，可能控制了发育阶段的开始。与之前发表的描述相反，泥炭藓似乎是培根沼泽中相对较新的先驱，而不是植物群的长期组成部分。

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来源期刊

Northeastern Naturalist 环境科学-生态学

CiteScore

1.10

自引率

0.00%

发文量

审稿时长

18-36 weeks

期刊介绍： The Northeastern Naturalist covers all aspects of the natural history sciences of terrestrial, freshwater, and marine organisms and the environments of the northeastern portion of North America, roughly bounded from Virginia to Missouri, north to Minnesota and Nunavut, east to Newfoundland, and south back to Virginia. Manuscripts based on field studies outside of this region that provide information on species within this region may be considered at the Editor’s discretion. The journal welcomes manuscripts based on observations and research focused on the biology of terrestrial, freshwater, and marine organisms and communities as it relates to their life histories and their function within, use of, and adaptation to the environment and the habitats in which they are found, as well as on the ecology and conservation of species and habitats. Such studies may encompass measurements, surveys, and/or experiments in the field, under lab conditions, or utilizing museum and herbarium specimens. Subject areas include, but are not limited to, anatomy, behavior, biogeography, biology, conservation, evolution, ecology, genetics, parasitology, physiology, population biology, and taxonomy. Strict lab, modeling, and simulation studies on natural history aspects of the region, without any field component, will be considered for publication as long as the research has direct and clear significance to field naturalists and the manuscript discusses these implications.