@article{fdi:010062057, title = {{S}tability of a {N}eotropical microrefugium during climatic instability}, author = {{M}ontade, {V}. and {L}edru, {M}arie-{P}ierre and {B}urte, {J}. and {P}assos {R}odrigues {M}artins, {E}. {S}. and {V}erola, {C}. {F}. and da {C}osta, {I}. {R}. and {M}agalhaes e {S}ilva, {F}. {H}.}, editor = {}, language = {{ENG}}, abstract = {{A}im {T}he primary objectives of this study were (1) to assess, in the light of palaeoecological reconstruction, the climate stability hypothesis used by evolutionary biologists to explain high diversity in historically stable areas, and (2) to identify the response mechanisms of a tropical rain forest microrefugium to climatic variability. {L}ocation {N}orth-eastern {B}razil, {S}erra de {M}aranguape. {M}ethods {V}egetation and climatic changes were reconstructed using a pollen record in a sediment core from a forest hollow, and the chronology was based on accelerator mass spectrometry radiocarbon analyses. {R}esults {P}ast vegetation dynamics consisted of three main forest types, shown by major compositional changes in rain forest assemblages between 5000 and 1000cal. yr bp. {D}ense ombrophilous forest was abruptly replaced by heliophilous early successional tree taxa at 4275cal. yr bp. {T}hese early successional tree taxa were established over a period of c.100years, and their dominance lasted for c.750years and was associated with dry conditions until 3525cal. yr bp. {S}ubsequently, the expansion of secondary successional tree taxa over a period of c.550years enabled the recovery of ombrophilous forest. {M}ain conclusions {T}he vegetation changes in the {S}erra de {M}aranguape provide evidence for the high sensitivity of this rain forest microrefugium to climatic variability on a multidecadal to millennial time-scale during the mid- to late {H}olocene. {D}espite the substantial compositional and climatic changes, this microrefugium apparently was continuously forested and responded to climatic instability by recruiting key species to its highly diverse stock. {T}his evidence helps to address the joint concerns of evolutionary biologists and palaeoecologists regarding how forests can persist during periods of climatic variability by showing that some tropical regions can remain continuously forested despite reorganization during abrupt and short-term climatic changes.}, keywords = {pollen analysis ; palaeoecology ; microrefugia ; rain forest ; historically ; stable area ; diversity ; {C}limate change ; north-eastern {B}razil ; {H}olocene ; {BRESIL} ; {ZONE} {TROPICALE}}, booktitle = {}, journal = {{J}ournal of {B}iogeography}, volume = {41}, numero = {6}, pages = {1215--1226}, ISSN = {0305-0270}, year = {2014}, DOI = {10.1111/jbi.12283}, URL = {https://www.documentation.ird.fr/hor/fdi:010062057}, }