@article{fdi:010074069, title = {{T}he effects of mid-{H}olocene fluvio-eolian interplay and coastal dynamics on the formation of dune-dammed lakes in {NE} {B}razil}, author = {{Z}ular, {A}. and {U}tida, {G}. and {C}ruz, {F}. {W}. and {S}awakuchi, {A}. {O}. and {W}ang, {H}. and {B}icego, {M}. and {G}iannini, {P}. {C}. {F}. and {R}odrigues, {S}. {I}. and {G}arcia, {G}. {P}. {B}. and {V}uille, {M}. and {S}ifeddine, {A}bdelfettah and {Z}ocatelli, {R}. and {T}urcq, {B}runo and {M}endes, {V}. {R}.}, editor = {}, language = {{ENG}}, abstract = {{W}e analyzed the {L}ate {Q}uaternary coastal evolution of the easternmost tip of {S}outh {A}merica in {B}razil in light of fluvial-eolian interactions controlled by relative sea-level, climate, and coastal physiography changes. {T}he chronology obtained by {OSL}-{SAR} of 36 samples coupled with sedimentological analysis from stabilized dunes suggest that eolian activity was primarily controlled by episodes of sediment availability because prevailing {SE} trade winds have been steadily strong throughout the {H}olocene. {C}ontrary to the most conventional view linking dune activity to aridity, dune buildup occurred in a period of increased humidity in {NE} {B}razil between 11 ka and 6 ka when a rising relative sea level and higher rainfall enhanced sediment delivery benefiting the construction of transgressive dunefields. {T}he interplay of these advancing dunes with the existing drainage pathways is here investigated using a modern regional analog and through the evolution of {B}oqueirao {L}ake formed by dune blockage. {A}nalysis of a sediment core from this lake dated between 8.4 and 0.9 ka indicated changes over time in microfossil assemblages, organic geochemistry, and grain size data conforming to fluvial or lacustrine depositional conditions. {B}etween 7.2 and 4.4 ka, during the predominantly regional humid climate, the high abundance of fluvial sponge species correlated with a framework of competent-flow drainage systems diverting from advancing dunes. {A}n abrupt transition from a wetter to a drier climate at 4.4-4.0 ka stimulated episodes of fluvial damming as indicated by sharp changes from sandy to muddy sediments and anomalous concentration of sponge spicules concurrent with significant mortality rates of fluvial adapted species. {F}rom 3.9 ka to the present, the disappearance of sponge spicules and peaking diatom concentration attested to a predominant lacustrine environment. {T}hus, the formation of {B}oqueirao {L}ake is mainly a result of the regionally drier climate and not a consequence of increased humidity in coastal {NE} {B}razil.}, keywords = {{D}une-dammed lakes ; {P}aleoclimate ; {C}oastal eolian deposits ; {F}luvio-eolian interplay ; {B}oqueirao lake ; {BRESIL} {NORD} {EST} ; {BOQUEIRAO} {LAC}}, booktitle = {}, journal = {{Q}uaternary {S}cience {R}eviews}, volume = {196}, numero = {}, pages = {137--153}, ISSN = {0277-3791}, year = {2018}, DOI = {10.1016/j.quascirev.2018.07.022}, URL = {https://www.documentation.ird.fr/hor/fdi:010074069}, }