@article{PAR00006014,
  title = {{S}oil evolution and subalpine ecosystem changes in the {F}rench {A}lps inferred from geochemical analysis of lacustrine sediments},
  author = {{M}ourier, {B}. and {P}oulenard, {J}. and {C}arcaillet, {C}. and {W}illiamson, {D}avid},
  editor = {},
  language = {{ENG}},
  abstract = {{T}his study aimed to reconstruct the history of soil development, ecosystem changes and associated erosional processes in a small mountain lacustrine basin at the decennial to millennial scale. {G}eochemical proxies of soil evolution were analysed in the {H}olocene lacustrine sediments and peats from {T}hyl {L}ake, {M}aurienne {V}alley, {F}rench {A}lps. {P}odzolization and chemical weathering processes were assessed using secondary {A}l- and {F}e-bearing phases together with major and {R}are {E}arth {E}lements ({REE}). {T}he resulting proxy records, spanning ca. 4,400 years between 8.6 and 4.2 cal ka {BP}, indicate that progressive pedogenesis occurred after deglaciation in a relatively stable subalpine ecosystem. {A}s shown by the associated increase in {A}l- and {F}e-bearing phases and some {REE} fractions, the establishment of a mixed cembra pine ecosystem from ca. 7.2-6.5 ka {BP} was associated with enhanced podzolisation processes in the catchment. {T}he progressive soil development was followed by a rapid transformation of the local environment and plant cover (the open waters of the lake were replaced by a confined peat environment) together with changes in forest fire regimes from ca. 6.8 ka {BP}. {D}epleted {REE} patterns, associated with low contents of secondary {A}l and {F}e, suggest a decrease in chemical weathering and podzolization in the catchment at that time, possibly associated with local intensification of weathering and drainage processes in a relatively acidic peat environment. {T}he higher variability of cembra pine and the increased abundance of sedge and other herbaceous plant remains in the lake sediment indicate semi-open vegetation environments from 5.7 cal ka {BP} onwards. {W}hereas fire events and plant cover appear to be significantly related, the soil processes seem primarily linked to vegetation composition, and secondarily to changes in fire regime.},
  keywords = {{P}edogenesis ; {L}ake sediment ; {P}edosignature ; {REE} ; {S}elective extractions ; {M}iddle {H}olocene},
  booktitle = {},
  journal = {{J}ournal of {P}aleolimnology},
  volume = {44},
  numero = {2},
  pages = {571--587},
  ISSN = {0921-2728},
  year = {2010},
  DOI = {10.1007/s10933-010-9438-0},
  URL = {https://www.documentation.ird.fr/hor/{PAR}00006014},
}