@article{fdi:010082653, title = {{I}mportance of estuary morphology for ecological connectivity with their adjacent coast : a case study in {B}razilian tropical estuaries}, author = {{P}elage, {L}. and {G}onzalez, {J}. {G}. and {L}e {L}oc'h, {F}ran{\c{c}}ois and {F}erreira, {V}. and {M}unaron, {J}ean-{M}arie and {L}ucena-{F}redou, {F}. and {F}redou, {T}.}, editor = {}, language = {{ENG}}, abstract = {{C}oastal habitats are interlinked by ecological connectivity, defined as the exchange of organic matter or organisms between habitats. {T}he degree of this connectivity will depend in particular on the geometric properties of the landscape. {T}he increasing anthropogenic alterations in estuaries therefore raises the need to understand how their morphological characteristics influence fluxes between habitats. {W}e used stable isotopes to investigate the variability of ecological connectivity between three estuaries and their adjacent coastal areas by tracking the origin of the organic matter (estuarine vs coastal) underlying the diet of the migrant species {E}ucinostomus argenteus. {T}he chosen estuaries were geomorphologically distinct, exhibiting, in particular, differences in their degree of connection to the sea, corresponding to the morphological features (shape, mouth width) controlling key physico-chemical variables in this habitat (e.g. salinity). {T}he sampling of the basal food sources contributing to the food web was performed in the three estuaries and in their adjacent coasts. {T}he variability in stable isotope ratios between estuaries was examined for both fish and sources of organic matter. {I}n the three estuaries, {B}ayesian models were applied for each season (dry and rainy) to quantify the relative contribution of sources from estuarine and coastal environments supporting the diet of the silver mojarra. {T}he share of coastal organic matter increased with the degree of sea connection, indicating that the properties of the seascape can regulate the intensity of interactions between ecosystems. {V}ariations in ecological connectivity are likely to affect the functioning of ecosystems as they influence trophic pathways and energy flows between adjacent habitats. {M}orphological modifications could thus significantly disturb ecosystems by altering the structure of food web, thereby affecting certain ecosystem services such as the availability of living marine resources.}, keywords = {{BRESIL} ; {ATLANTIQUE} ; {ZONE} {TROPICALE} ; {PERNAMBUCO}}, booktitle = {}, journal = {{E}stuarine {C}oastal and {S}helf {S}cience}, volume = {251}, numero = {}, pages = {107184 [11 ]}, ISSN = {0272-7714}, year = {2021}, DOI = {10.1016/j.ecss.2021.107184}, URL = {https://www.documentation.ird.fr/hor/fdi:010082653}, }