FN Archimer Export Format
PT J
TI Silicon utilization by sponges: an assessment of seasonal changes
BT 
AF LOPEZ-ACOSTA, Maria
   LEYNAERT, Aude
   COQUILLE, Valerie
   MALDONADO, Manuel
AS 1:1;2:2;3:2;4:1;
FF 1:;2:;3:;4:;
C1 CSIC, CEAB, Dept Marine Ecol, Blanes 17300, Girona, Spain.
   Inst Univ Europeen Mer, UMR 6539, Lab Sci Environm Marin, Technopole Brest Iroise, F-29280 Plouzane, France.
C2 CSIC, SPAIN
   CNRS, FRANCE
UM LEMAR
IF 2.359
TC 5
UR https://archimer.ifremer.fr/doc/00616/72772/72246.pdf
   https://archimer.ifremer.fr/doc/00616/72772/72247.pdf
LA English
DT Article
DE ;Silicic acid;Silicon consumption kinetics;Siliceous sponges;Seasonal variability
AB Awareness that sponges are relevant silicic acid (DSi) users is growing; however, understanding how their DSi consumption kinetics perform is still limited. We investigated the effects that seasonal changes in a temperate ecosystem (Bay of Brest, France) have on the DSi consumption of 2 dominant sponge species: Hymeniacidon perlevis and Tethya citrina. The results indicated that while both species increased their rate of DSi utilization with DSi availability following saturable Michaelis-Menten kinetics, only the kinetics of T. citrina shifted seasonally. This species consumed DSi at a higher rate in autumn than in summer. Surprisingly, the increase in DSi utilization did not involve an increase in net affinity for DSi but rather augmentation of both the half-saturation concentration and the maximum velocity of transport characterizing the kinetics. By quantifying the biomass of the 2 sponge species in the bay and the monthly availability of DSi over an annual cycle, a yearly DSi consumption of 2.50 +/- 3.21 x 10(6) mol Si was calculated for their populations. The oversight of the seasonal kinetic change would introduce inaccuracies of 10% into the global DSi consumption budget of the bay. Because the seasonal kinetic differences increased enormously with increasing DSi availability, the relevance of the kinetic shift into the budgets could increase to >30% for sponge assemblages other than those in the bay whenever they are characterized by higher DSi availability, as is typically occurring at high latitudes and in the deep sea. 
PY 2018
PD OCT
SO Marine Ecology Progress Series
SN 0171-8630
PU Inter-research
VL 605
UT 000449165100009
BP 111
EP 123
DI 10.3354/meps12752
ID 72772
ER

EF