FN Archimer Export Format
PT J
TI A 150-year record of phytoplankton community succession controlled by hydroclimatic variability in a tropical lake
BT 
AF YAMOAH, Kweku Afrifa
   CALLAC, Nolwenn
   FRU, Ernest Chi
   WOHLFARTH, Barbara
   WIECH, Alan
   CHABANGBORN, Akkaneewut
   SMITTENBERG, Rienk H.
AS 1:1;2:1;3:1;4:1;5:1;6:2;7:1;
FF 1:;2:;3:;4:;5:;6:;7:;
C1 Department of Geological Sciences and Bolin Centre for Climate Research, Stockholm University, 10691 Stockholm, Sweden
   Departments of Geology, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
C2 UNIV STOCKHOLM, SWEDEN
   UNIV CHULALONGKORN, THAILAND
IN DOAJ
IF 3.851
TC 4
UR https://archimer.ifremer.fr/doc/00860/97165/106042.pdf
   https://archimer.ifremer.fr/doc/00860/97165/106043.pdf
   https://archimer.ifremer.fr/doc/00860/97165/106044.pdf
   https://archimer.ifremer.fr/doc/00860/97165/106045.pdf
LA English
DT Article
AB Climate and human-induced environmental change promote biological regime shifts between alternate stable states, with implications for ecosystem resilience, function, and services. While these effects have been shown for present-day ecosystems, the long-term response of microbial communities has not been investigated in detail. This study assessed the decadal variations in phytoplankton communities in a ca. 150 year long sedimentary archive of Lake Nong Thale Prong (NTP), southern Thailand using a combination of bulk geochemical analysis, quantitative polymerase chain reaction (qPCR) and lipid biomarkers techniques including compound-specific hydrogen isotope analysis as a proxy for precipitation. Relatively drier and by inference warmer conditions from ca. 1857 to 1916 Common Era (CE) coincided with a dominance of the green algae Botryococcus braunii, indicating lower nutrient levels in the oxic lake surface waters, possibly related to lake water stratification. A change to higher silica (Si) input around 1916 CE was linked to increased rainfall and concurs with an abrupt takeover by diatom blooms lasting for 50 years. These were increasingly outcompeted by cyanobacteria from the 1970s onwards, most likely because of increased levels of anthropogenic phosphate and a reduction in rainfall. Our results showcase that the multi-proxy approach applied here provides an efficient way to track centennial-scale limnological, geochemical and microbial change, as influenced by hydroclimatic and anthropogenic forcing. 
PY 2016
SO Biogeosciences
SN 1726-4170
PU Copernicus Gesellschaft Mbh
VL 13
IS 13
UT 000381099900009
BP 3971
EP 3980
DI 10.5194/bg-13-3971-2016
ID 97165
ER

EF