FN Archimer Export Format
PT J
TI Demonstration of facilitation between microalgae to face environmental stress
BT 
AF KRICHEN, Emna
   RAPAPORT, Alain
   LE FLOC'H, Emilie
   FOUILLAND, Eric
AS 1:1,2;2:2;3:1;4:1;
FF 1:;2:;3:;4:;
C1 Univ Montpellier, MARBEC, CNRS, IFREMER,IRD, Sete, France.
   Univ Montpellier, MISTEA, INRA, SupAgro, Montpellier, France.
C2 CNRS, FRANCE
   INRA, FRANCE
UM MARBEC
IN WOS Cotutelle UMR
   DOAJ
   copubli-france
IF 3.998
TC 19
UR https://archimer.ifremer.fr/doc/00592/70434/68528.pdf
   https://archimer.ifremer.fr/doc/00592/70434/71006.pdf
LA English
DT Article
AB Positive interactions such as facilitation play an important role during the biological colonization and species succession in harsh or changing environments. However, the direct evidence of such ecological interaction in microbial communities remains rare. Using common freshwater microalgae isolated from a High Rate Algal Pond HRAP treating wastewaters, we investigated with both experimental and modeling approaches the direct facilitation between two algal strains during the colonization phase. Our results demonstrate that the first colonization by microalgae under a severe chemical condition arose from the rapid growth of pioneer species such as Chlorella sorokiniana, which facilitated the subsequent colonization of low growth specialists such as Scenedesmus pectinatus. The pioneer species rapidly depleted the total available ammonia nitrogen favoring the specialist species initially inhibited by free ammonia toxicity. This latter species ultimately dominated the algal community through competitive exclusion under low nutrient conditions. We show that microbial successions are not only regulated by climatic conditions but also by interactions between species based on the ability to modify their growth conditions. We suggest that facilitation within the aquatic microbial communities is a widespread ecological interaction under a vast range of environmental stress. 
PY 2019
PD NOV
SO Scientific Reports
SN 2045-2322
PU Nature Publishing Group
VL 9
UT 000494258500096
DI 10.1038/s41598-019-52450-9
ID 70434
ER

EF