@article{fdi:010095492,
  title = {{B}each-cast algae communities as a proxy for evaluating coastal water eutrophication},
  author = {{T}hibault, {M}artin and {V}erniest, {F}. and {P}oisson, {P}. and {V}acher, {V}. and {K}erbiriou, {C}. and {L}e {V}iol, {I}.},
  editor = {},
  language = {{ENG}},
  abstract = {{C}oastal ecosystems, located at the intersection of land and sea, are subject to multiple humaninduced stressors that affect both terrestrial and marine environments. {A}mong the 12 core priorities of global policies and biosphere monitoring efforts, eutrophication indicators play a key role. {H}owever, developing and implementing these indicators at high resolution and large spatial scale poses significant logistical, technological, and economic challenges. {S}atellite-based chlorophyll-a measurements provide insights into the immediate effects of coastal eutrophication, but assessing its impacts on benthic habitats remains a significant hurdle. {A}n alternative lies in examining beach-stranded materials, particularly macrophyte wracks, which may serve as proxies for shifts in the diversity and composition of coastal benthic habitats. {T}his study explored whether macroalgae communities in beach wracks reflect the condition of marine habitats affected by coastal eutrophication. {U}sing empirical data (for 84 taxa on 212 sites), two community-level indicators were developed: {C}ommunity {T}urbidity {T}olerance ({CTTI}) and {C}ommunity {T}hallus {L}ength, derived from algae found in beach wracks. {B}oth indicators were shown to correlate with coastal chlorophyll-a concentrations, a widely used proxy for eutrophication. {B}oth metrics also aligned with trends in the {W}ater {S}trategy {F}ramework {D}irective's {G}ood {E}cological {S}tatus ({GES}) indicator, even though the {CTTI} only had a significant relationship with extreme {GES} levels. {T}he macrophyte wracks derived indicators of coastal eutrophication we developed here further promise increased sampling resolution, cost-efficiency, and logistical simplicity. {M}oreover, beach wrack monitoring offers strong potential for inclusion in citizen science programs, further enhancing its scalability and impact.},
  keywords = {{E}utrophication ; {E}cological indicators ; {M}arine strategy framework directive ; {M}acroalgae ; {B}each-wrack ; {ATLANTIQUE} ; {MANCHE} ; {FRANCE} ; {BRETAGNE}},
  booktitle = {},
  journal = {{G}lobal {E}cology and {C}onservation},
  volume = {64},
  numero = {},
  pages = {e03919 11 p.]},
  year = {2025},
  DOI = {10.1016/j.gecco.2025.e03919},
  URL = {https://www.documentation.ird.fr/hor/fdi:010095492},
}