RefDoc
Haut

Faire une nouvelle recherche
Make a new search
Lancer la recherche


Titre du document / Document title

Effects of temperature, irradiance, and salinity on photosynthesis, growth rates, total toxicity, and toxin composition for Alexandrium fundyense isolates from the Gulf of Maine and Bay of Fundy

Auteur(s) / Author(s)

ETHERIDGE Stacey M. (1) ; ROESLER Collin S. (2) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Department of Marine Sciences, University of Connecticut, 1080 Shennecossett Road, Groton, Connecticut 06340, ETATS-UNIS
(2) Bigelow Laboratory for Ocean Sciences, P O Box 475, West Boothbay Harbor, Maine 04575, ETATS-UNIS

Résumé / Abstract

The objective of this study was to determine the effects of temperature, irradiance, and salinity on photosynthesis, growth rate, total toxicity, and toxin composition for two Alexandriumfundyense isolates in the laboratory. The A. fundyense cultures studied were isolated from coastal waters off Monhegan Island (MI) in the GoM and the Bay of Fundy (BoF). Laboratory experiments demonstrated that temperature exerted the greatest impact on chlorophyll-specific maximal photosynthetic rates with negligible effects by light or salinity. Temperature and irradiance exerted the greatest influence on species-specific growth rates, with the MI isolate exhibiting greater maximal growth rates. The BoF isolate was generally more toxic, with temperature inducing the greatest change in cellular toxicity, followed by irradiance and salinity. Variations in toxicity were due to changes in toxin concentration, the relative toxin composition, or both depending on the isolate and experimental condition. The lack of a clear relationship between photosynthesis or growth and toxicity suggests that toxicity is, at least in part, driven directly by environmental conditions. Isolate-specific A. fundyense responses to the environment incorporated into modeling efforts may ultimately enhance predictive and monitoring capabilities for PSP outbreaks.

Revue / Journal Title

Deep-sea research. Part 2. Topical studies in oceanography    ISSN  0967-0645 

Source / Source

2005, vol. 52, no 19-21 (516 p.)  [Document : 10 p.] (1 p.1/4), pp. 2491-2500 [10 page(s) (article)]

Langue / Language

Anglais

Editeur / Publisher

Elsevier, Kidlington, ROYAUME-UNI  (1993) (Revue)

Mots-clés anglais / English Keywords

Atlantic Ocean

;

North Atlantic

;

Atlantic Ocean

;

North Atlantic

;

Bay of Fundy

;

Gulf of Maine

;

Gulf of Maine

;

monitoring

;

Modeling

;

growth

;

concentration

;

chlorophyll

;

experimental studies

;

islands

;

Coastal water

;

toxicity

;

growth rates

;

photosynthesis

;

salinity

;

irradiance

;

temperature

;

Mots-clés français / French Keywords

Océan Atlantique

;

Océan Atlantique Nord

;

Océan Atlantique

;

Océan Atlantique Nord

;

Baie Fundy

;

Golfe du Maine

;

Golfe Maine

;

Surveillance

;

Modélisation

;

Croissance

;

Concentration

;

Chlorophylle

;

Etude expérimentale

;

Ile

;

Eau côtière

;

Toxicité

;

Taux croissance

;

Photosynthèse

;

Salinité

;

Eclairement énergétique

;

Température

;

Mots-clés espagnols / Spanish Keywords

Océano Atlántico

;

Océano Atlántico Norte

;

Océano Atlántico

;

Océano Atlántico Norte

;

Bahía de Fundy

;

Golfo de Maine

;

Golfo Maine

;

Vigilancia

;

Modelización

;

Concentración

;

Clorofila

;

Isla

;

Agua costera

;

Toxicidad

;

Fotosíntesis

;

Salinidad

;

Temperatura

;

Localisation / Location

INIST-CNRS, Cote INIST : 7679 A2, 35400013445185.0070

Nº notice refdoc (ud4) : 17379659



Faire une nouvelle recherche
Make a new search
Lancer la recherche
Bas