@article{fdi:010078074,
  title = {{W}hen archives are missing, deciphering the effects of public policies and climate variability on the {B}razilian semi-arid region using sediment core studies},
  author = {{L}edru, {M}arie-{P}ierre and {J}eske-{P}ieruschka, {V}. and {B}remond, {L}. and {D}evelle, {A}. {L}. and {S}abatier, {P}. and {M}artins, {E}. {S}. {P}. {R}. and de {F}reitas, {M}. {R}. {D}. and {F}ontenele, {D}. {P}. and {A}rnaud, {F}. and {F}avier, {C}. and {B}arroso, {F}. {R}. {G}. and {A}raujo, {F}. {S}.},
  editor = {},
  language = {{ENG}},
  abstract = {{T}he northeastern region of {B}razil is the most densely populated and biodiverse semi-arid regions of the planet. {E}ffects of the natural climate variability and colonization on the landscape have been described since the beginning of the 16th century but little is known about their effects on natural resources. {C}limate projections predict temperatures above 40 degrees {C} and an increase in the number and duration of droughts at the end of the 21st century with strong societal impacts. {H}ere, we analyze the influence of public policies, human activities and natural climate variability on the environment over the last 60 years. {O}ur study is based on sedimentological and environmental reconstructions from two sediment cores collected in two dam lakes on the river {A}carau in the {S}tate of {C}eara. {M}ultiproxy analyses of both cores (inorganic geochemistry, pollen, charcoal, remote sensing) at an annual resolution showed that 1) at interannual scale composition and distribution of the dry forest (known as {C}aatinga) were not affected by the alternance of drought and high moisture episodes; 2) at decadal scale human activities such as agriculture were reflected by changes in vegetation cover and fishery by progressive changes in lake trophic status; 3) public policies were able to promote changes in the landscape e.g., land colonization with the regression of the dry forest and irrigation plan able to amplify the deforestation and change the floristic composition. {T}hanks to paleo-science approach, our environmental diagnosis should help future decision-making and provide guidelines for preservation of resources and wellbeing of the inhabitants.},
  keywords = {{C}aatinga ; {L}ake reservoir ; {S}ediment ; {D}rought ; {L}and degradation ; {H}uman impact ; {BRESIL} ; {ZONE} {SEMIARIDE}},
  booktitle = {},
  journal = {{S}cience of the {T}otal {E}nvironment},
  volume = {723},
  numero = {},
  pages = {137989 [16 ]},
  ISSN = {0048-9697},
  year = {2020},
  DOI = {10.1016/j.scitotenv.2020.137989},
  URL = {https://www.documentation.ird.fr/hor/fdi:010078074},
}