Abstract
Plant macrofossils data were used to identify the successive peatland communities during the last 3500 years in the floodplain of the Mana River (foothills of the Eastern Sayan Mountains). The reconstruction of the peatland development indicated that the peatland in the Mana River basin formed about 3500 years ago. The peatland formed as a result of overgrowing floodplain and water logging of terrace lows. The authors observed three successive changes: birch forest with sedge and hypnum mosses in the second half of the Subboreal period, wood-marsh plant association at the start of the Middle Subatlantic period (1600 years BP), the herb-wort phytocoenosis with inclusions of mezoeutrophycal plant species have been growing since the Late Subboreal period (950 years BP).
Highlights
Peatlands are an important natural archive for past climatic changes, primarily due to their sensitivity to changes in the water balance and the dating possibilities of peat sediments
The purpose of this research is to study some features of peatland development and environmental reconstructions from the Holocene period in the south part of Yenisei Siberia
Stratigraphy, radiocarbon dating and plant macrofossils were used to reconstruct the development and ecology of a small raised peatland because a peatland with a small area was most sensitive to climate change [9]
Summary
Peatlands are an important natural archive for past climatic changes, primarily due to their sensitivity to changes in the water balance and the dating possibilities of peat sediments. The main method of the research was macrofossils analysis of peat This analysis can be used to reconstruct the development of the local vegetation and surface wetness on peatlands, and to elucidate successional processes. To interpret these proxies by macrofossil analysis, the current botanical composition of the bog and the ecological behavior of different plant species were used. The analysis of plant macrofossils in the peat, based on the study of the flora and vegetation in a particular place over a period of time, has allowed us to reconstruct the environmental changes that have occurred since the Late Glacial Period. We used the ecological scales of moisture and reconstructed surface wetness for the entire period of the peatland formation
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