@article{PAR00012712,
  title = {{V}egetation controls on weathering intensity during the last deglacial transition in southeast africa},
  author = {{I}vory, {S}. {J}. and {M}c{G}lue, {M}. {M}. and {E}llis, {G}. {S}. and {L}ezine, {A}nne-{M}arie and {C}ohen, {A}. {S}. and {V}incens, {A}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}ropical climate is rapidly changing, but the effects of these changes on the geosphere are unknown, despite a likelihood of climatically-induced changes on weathering and erosion. {T}he lack of long, continuous paleo-records prevents an examination of terrestrial responses to climate change with sufficient detail to answer questions about how systems behaved in the past and may alter in the future. {W}e use high-resolution records of pollen, clay mineralogy, and particle size from a drill core from {L}ake {M}alawi, southeast {A}frica, to examine atmosphere-biosphere-geosphere interactions during the last deglaciation (similar to 18-9 ka), a period of dramatic temperature and hydrologic changes. {T}he results demonstrate that climatic controls on {L}ake {M}alawi vegetation are critically important to weathering processes and erosion patterns during the deglaciation. {A}t 18 ka, afromontane forests dominated but were progressively replaced by tropical seasonal forest, as summer rainfall increased. {D}espite indication of decreased rainfall, drought-intolerant forest persisted through the {Y}ounger {D}ryas ({YD}) resulting from a shorter dry season. {F}ollowing the {YD}, an intensified summer monsoon and increased rainfall seasonality were coeval with forest decline and expansion of drought-tolerant miombo woodland. {C}lay minerals closely track the vegetation record, with high ratios of kaolinite to smectite ({K}/{S}) indicating heavy leaching when forest predominates, despite variable rainfall. {I}n the early {H}olocene, when rainfall and temperature increased (effective moisture remained low), open woodlands expansion resulted in decreased {K}/{S}, suggesting a reduction in chemical weathering intensity. {T}errigenous sediment mass accumulation rates also increased, suggesting critical linkages among open vegetation and erosion during intervals of enhanced summer rainfall. {T}his study shows a strong, direct influence of vegetation composition on weathering intensity in the tropics. {A}s climate change will likely impact this interplay between the biosphere and geosphere, tropical landscape change could lead to deleterious effects on soil and water quality in regions with little infrastructure for mitigation.},
  keywords = {{AFRIQUE} {DE} {L}'{EST}},
  booktitle = {},
  journal = {{P}los {O}ne},
  volume = {9},
  numero = {11},
  pages = {art. e112855 [11 ]},
  ISSN = {1932-6203},
  year = {2014},
  DOI = {10.1371/journal.pone.0112855},
  URL = {https://www.documentation.ird.fr/hor/{PAR}00012712},
}