FN Archimer Export Format
PT J
TI Niche differentiation of Dinophysis acuta and D. acuminata in a stratified fjord
BT 
AF Baldrich, Ángela M.
   Pérez-Santos, Iván
   Álvarez, Gonzalo
   Reguera, Beatriz
   Fernández-Pena, Concepción
   Rodríguez-Villegas, Camilo
   Araya, Michael
   Álvarez, Francisco
   Barrera, Facundo
   Karasiewicz, Stephane
   Díaz, Patricio A.
AS 1:1,10;2:2,3;3:4,5;4:6;5:7;6:1,10;7:5;8:5;9:8;10:9;11:2,10;
FF 1:;2:;3:;4:;5:;6:;7:;8:;9:;10:PDG-ODE-LITTORAL-LERBL;11:;
C1 Programa de Doctorado en Ciencias, mención Conservación y Manejo de Recursos Naturales, Universidad de Los Lagos, Camino Chinquihue km 6, Puerto Montt, Chile
   Centro i~mar, Universidad de Los Lagos, Casilla 557, Puerto Montt, Chile
   Centro de Investigación Oceanográfica COPAS Sur-Austral, Universidad de Concepción, Chile
   Departamento de Acuicultura, Universidad Católica del Norte, Coquimbo, Chile
   Centro de Investigación y Desarrollo Tecnológico en Algas (CIDTA), Universidad Católica del Norte, Coquimbo, Chile
   Centro Oceanográfico de Vigo, Instituto Español de Oceanografía (IEO), Vigo, Spain
   Centro Oceanográfico de A Coruña, Instituto Español de Oceanografía (IEO), A Coruña, Spain
   Center for Climate and Resilience Research (CR2), Facultad de Ciencias Naturales y Oceanográficas Universidad de Concepción & Departamento de Química Ambiental Universidad Católica de la Santísima Concepción, Concepción, Chile
   Laboratory of Environment Resources, Boulogne- sur- Mer, French Research Institute for the Exploitation of the Sea (IFREMER), Issy-les-Moulineaux, France
   CeBiB, Universidad de Los Lagos, Casilla 557, Puerto Montt, Chile
C2 UNIV LOS LAGOS, CHILE
   UNIV LOS LAGOS, CHILE
   UNIV CONCEPCION, CHILE
   UNIV CATOLICA NORTE, CHILE
   UNIV CATOLICA NORTE, CHILE
   IEO, SPAIN
   IEO, SPAIN
   UNIV CATOL SANTISIMA CONCEPCION, CHILE
   IFREMER, FRANCE
   UNIV LOS LAGOS, CHILE
SI BOULOGNE
SE PDG-ODE-LITTORAL-LERBL
IN WOS Ifremer UPR
   copubli-europe
   copubli-int-hors-europe
IF 5.905
TC 15
UR https://archimer.ifremer.fr/doc/00693/80484/83838.pdf
LA English
DT Article
DE ;Dinophysis acuminata;Dinophysis acuta;Realized niche;in situ division rates;Microplanktonic ciliate prey;DSP toxins;Pectenotoxins;Chilean fjords
AB Dinophysis acuta and D. acuminata are associated with lipophilic toxins in Southern Chile. Blooms of the two species coincided during summer 2019 in a highly stratified fjord system (Puyuhuapi, Chilean Patagonia). High vertical resolution measurements of physical parameters were carried out during 48 h sampling to i) explore physiological status (e.g., division rates, toxin content) and ii) illustrate the fine scale distribution of D. acuta and D. acuminata populations with a focus on water column structure and co-occurring plastid-bearing ciliates. The species-specific resources and regulators defining the realized niches (sensu Hutchinson) of the two species were identified. Differences in vertical distribution, daily vertical migration and in situ division rates (with record values, 0.76 d−1, in D. acuta), in response to the environmental conditions and potential prey availability, revealed their niche differences. The Outlying Mean Index (OMI) analysis showed that the realized niche of D. acuta (cell maximum 7 × 103 cells L−1 within the pycnocline) was characterized by sub-surface estuarine waters (salinity 23 – 25), lower values of turbulence and PAR, and a narrow niche breath. In contrast, the realized niche of D. acuminata (cell maximum 6.8 × 103 cells L−1 just above the pycnocline) was characterized by fresher (salinity 17 – 20) outflowing surface waters, with higher turbulence and light intensity and a wider niche breadth. Results from OMI and PERMANOVA analyses of co-occurring microplanktonic ciliates were compatible with the hypothesis of species such as those from genera Pseudotontonia and Strombidium constituting an alternative ciliate prey to Mesodinium. The D. acuta cell maximum was associated with DSP (OA and DTX-1) toxins and pectenotoxins; that of D. acuminata only with pectenotoxins. Results presented here contribute to a better understanding of the environmental drivers of species-specific blooms of Dinophysis and management of their distinct effects in Southern Chile. Previous article 
PY 2021
PD MAR
SO Harmful Algae
SN 1568-9883
PU Elsevier BV
VL 103
UT 000651294000002
DI 10.1016/j.hal.2021.102010
ID 80484
ER

EF