E3S Web of Conf.
Volume 393, 20232023 5th International Conference on Environmental Prevention and Pollution Control Technologies (EPPCT 2023)
|Number of page(s)
|Environmental Assessment and Urban and Rural Resource Planning
|02 June 2023
Late-Holocene fire regimes under climate and vegetation change in the Sanjiang plain, northeastern China
School of Geographic and Environmental Sciences, Tianjin Normal University, Tianjin 300387, China
Understanding historical fire regimes and their driving mechanisms provides valuable insights for future hazard prediction. Here, we reconstructed the fire and vegetation histories of the Sanjiang Plain over the last 5000 years based on microscopic (<125) charcoal content and morphology of sedimentary coring in the coastal marshes of the middle reaches of the Ussuri River, respectively. The results of the study indicate that four high fire frequency phases were identified in the last 5000 years, at 4.3-4.0 ka BP, 2.8-2. ka BP, 1.4-1.2 ka BP, and 0.5 ka BP to date. These intervals coincide with the weakening phase of the East Asian summer monsoon (EASM) during the late Holocene and are generally consistent with the decreasing trend of precipitation in the region. Thus, we suggest that the EASM circulation, and especially its accompanying precipitation, played a key role in the evolution of fire regimes in the Sanjiang Plain during the Late Holocene. In addition to climate change, regional vegetation conditions are also significant factors driving fire occurrence. In contrast, the gradual increase in fire frequency over the last 500 years has been caused mainly by human activities rather than climate and vegetation.
© The Authors, published by EDP Sciences, 2023
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.