@Article{RossettiGTTYTMC:2018:UnLoLa,
author = "Rossetti, Dilce de F{\'a}tima and Gribel, Rog{\'e}rio and
Toledo, Peter Mann de and Tatumi, Sonia H. and Yee, M{\'a}rcio
and Tudela, Diego R. G. and Munita, Casimiro S. and Coelho, Luiz
de Souza",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas da Amaz{\^o}nia (INPA)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Universidade Federal
de S{\~a}o Paulo (UNIFESP)} and {Universidade Federal de S{\~a}o
Paulo (UNIFESP)} and {Universidade de S{\~a}o Paulo (USP)} and
{Instituto de Pesquisas Energ{\'e}ticas e Nucleares (IPEN)} and
{Instituto Nacional de Pesquisas da Amaz{\^o}nia (INPA)}",
title = "Unfolding long-term Late Pleistocene–Holocene disturbances of
forest communities in the southwestern Amazonian lowlands",
journal = "Ecosphere",
year = "2018",
volume = "9",
number = "10",
pages = "e02457",
month = "Oct.",
keywords = "Amazonian lowlands, distribution patterns, forest onset,
geological history, Holocene, Late Pleistocene,long-term
disturbances.",
abstract = "Linking the distribution of plant species to geology has generally
been biased by the over-simplification of landscape evolution and
the lack of understanding of complex geological processes. The
Amazonian lowlands have forests in different successional stages,
and a growing perception is that such heterogeneity results from
long-term environmental changes. This hypothesis is investigated
by designing an analytical model based on past and present-day
vegetation and successions of the plant communities, combined with
an advanced understanding of geological history. An area of
southwestern Amazonia was selected for floristic inventories, and
we interpreted the paleovegetation based on C/N and \δ13C
analyses of sedimentary organic matter. These data were examined
in the context of the geological evolution on the basis of new
sedimentological and chronological data. The topographically high
Late Pleistocene deposits had continuous and highly diversified
late-successional terra firme forests as well as local fluvial
paleolandforms of younger ages with less diversified campinarana
forests. Late PleistoceneHolocene terrains in intermediate
elevations had terra firme forests, but shorter trees with lower
basal areas and ecotonal forests appeared near the confines of the
forestsavanna, while Holocene deposits recorded only seasonally
flooded varzea forests. Several deposits of Late Pleistocene and
Late PleistoceneHolocene age recorded an expansion of C4
terrestrial plants before the establishment of the forest from
~20,000 cal yr BP to 7578 cal yr BP, which is not related to past
arid episodes. We recorded forests with onsets at 61303533 cal yr
BP, 34022800 cal yr BP, and 1624964 cal yr BP to terra firme,
varzea, and ecotonal forests, respectively. However, not all
forests have reached maturity stages due to their location on
terrains with a diverse history of terrace downcutting and
deposition, which had a direct impact on local hydrology with the
interaction of topographic gradients. The hydrology of the study
area was also controlled by the distance from the main river
valley. Capturing long-term disturbances over this region of still
pristine forests may help elucidate the potential mechanisms that
also determine trends in tree growth and forest diversity in other
Neotropical regions.",
doi = "10.1002/ecs2.2457",
url = "http://dx.doi.org/10.1002/ecs2.2457",
issn = "2150-8925",
language = "en",
targetfile = "Rossetti_et_al-2018-Ecosphere.pdf",
urlaccessdate = "27 abr. 2024"
}