@article{fdi:010091598,
  title = {{F}oraging under extreme events : contrasting adaptations by benthic macrofauna to drastic biogeochemical disturbance},
  author = {{W}ang, {Y}.{V}. and {L}arsen, {T}. and {L}ebrato, {M}. and {T}seng, {L}.{C}. and {L}ee, {P}.{W}. and {S}ánchez, {N}. and {M}olinero, {J}uan-{C}arlos and {H}wang, {J}.{S}. and {C}han, {T}.{Y}. and {G}arbe {S}ch{\¨o}nberg, {D}.},
  editor = {},
  language = {{ENG}},
  abstract = {1. {H}ydrothermal vent systems are important biodiversity hotspots that host a vast array of unique species and provide information on life's evolutionary adaptations to extreme environments. {H}owever, these habitats are threatened by both human exploitation and extreme natural events, both of which can rapidly disrupt the delicate balance of the food webs found in these systems. {T}his is particularly true for shallow vent endemic animals due to their limited dietary niche and specialized adaptations to specific biogeochemical conditions. 2. {I}n this study, we used the shallow hydrothermal vents of {K}ueishantao off the coast of {T}aiwan as a natural laboratory to examine the response of a benthic food web to a {M}5.8 earthquake and a {C}5 typhoon that led to a two-year "near shutdown" of the vents. {T}hese perturbations drastically altered the local biogeochemical cycle and the dietary availability of chemosynthetic versus photosynthetic food resources.





3. {O}ur analysis of multiple stable isotopes, including those of sulphur, carbon, and nitrogen (delta {S}-34, delta {C}-13, and delta {N}-15), from different benthic macrofauna reveals that endemic and non-endemic consumers exhibited different responses to sudden disruption in habitat and biogeochemical cycling. 4. {T}he endemic vent crab, {X}enograpsus testudinatus, continued to partially rely on chemosynthetic sulphur bacteria despite photosynthetic sources being the most dominant food source after the disruption. {W}e posit that {X}. testudinatus has an obligate nutritional dependence on chemoautotrophic sources because the decrease in chemoautotrophic production was accompanied by a dramatic decrease in the abundance of {X}. testudinatus. {T}he population decline rate was similar to 19 individuals per m(2) per year before the perturbation, but the decline rate increased to 40 individuals per m(2) per year after the perturbation. {I}n contrast, the non-endemic gastropods exhibited much greater dietary plasticity that tracked the overall abundance of photo- and chemo-synthetic dietary sources. 5. {T}he catastrophic events in shallow hydrothermal vent ecosystem presented a novel opportunity to examine dietary adaptations among endemic and non-endemic benthic macrofauna in response to altered biogeochemical cycling. {O}ur findings highlight the vulnerability of benthic specialists to the growing environmental pressures exerted by human activities worldwide.},
  keywords = {{TAIWAN} ; {PACIFIQUE} ; {ILE} {GUISHAN}},
  booktitle = {},
  journal = {{F}unctional {E}cology},
  volume = {37},
  numero = {5},
  pages = {1390--1406},
  ISSN = {0269-8463},
  year = {2023},
  DOI = {10.1111/1365-2435.14312},
  URL = {https://www.documentation.ird.fr/hor/fdi:010091598},
}