Characterization of metabolic adaptations of planktonic species/assemblages to suboxic/hypoxic conditions off ChileEntry ID: GLOBEC_045_CHL_009
Characterization of the metabolic adaptations of
planktonic species/assemblages to the suboxic/hypoxic
conditions in the Humboldt Current System off Chile
The metabolic adaptations of planktonic species to
hypoxic waters associated with the presence of the
Equatorial subsurface water in the epipelagic system of
the Humboldt Current System were unknown previous to the
FONDAP-Humboldt ... programme.
This work involved determining the type and activity of
the enzymes involved in anaerobic metabolism. The enzymatic
techniques were developed on intertidal (littoral) and
sublittoral species. Several experiments were conducted on
P. laevigatus, an intertidal crustacean, to determine the
presence and activity of lactate dehyrogenase (LDH),
octopine dehydrogenase (OPDH), strombin
dehydrogenase (STRDH), alanopin dehydrogenase (ALPDH) and
alcohol dehydrogenase (ADH). In addition, it's aerobic
respiration was determined under different temperatures
and it's resistance to hypoxic conditions in seawater.
A comprehensive study was undertaken on the sublittoral
polychaete assemblage living under low oxygen conditions
off Concepcion. The techniques developed during the
polychaete and intertidal species experiments, allowed the
testing and standarization of the biochemical techniques.
With this background, the analysis of the biochemical
adaptation to hypoxia of planktonic species was possible.
The pyruvates oxidoreductases in Euphausia mucronata and
Calanus chilensis - two key species of the pelagic
ecosystem off northern Chile - were analyzed.
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This data set description is a member of a collection. The collection is described in
OCEANS > COASTAL PROCESSES > INTERTIDAL ZONE
OCEANS > OCEAN CHEMISTRY > OXYGEN
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > ARTHROPODS > CRUSTACEANS
BIOSPHERE > AQUATIC ECOSYSTEMS > BENTHIC HABITAT
BIOSPHERE > AQUATIC ECOSYSTEMS > COASTAL HABITAT
BIOSPHERE > AQUATIC ECOSYSTEMS > PELAGIC HABITAT
BIOSPHERE > ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > OXYGEN DEMAND
Role: DIF AUTHOR
Phone: +44 (0)1752 633401
Fax: +44 (0)1752 633101
Email: globec at pml.ac.uk
GLOBEC International Project Office Plymouth Marine Laboratory Prospect Place
Postal Code: PL1 3DH
Email: rescribano at uantof.cl
University of Antofagasta PO Box 170
Published or In Press
Eissler, Y. & R. A. Quiqones, 1999. Microplanktonic
respiration off northern Chile during El Nino 1997-1998.
J. Plankton Res. 21 (12): 2263-2283.
Escribano, R. & P. Hidalgo, 2000. Spatial distribution
of copepods during coastal upwelling in a northern area of
the Eastern Boundary Humboldt Current. J. Mar. Biol. Assoc.
UK. 80 (2): 283 - 290.
Escribano, R., V. Marmn & C. Irribarrren, 2000.
Distribution of Euphausia mucronata at the upwelling area
of Peninsula Mejillones, northern Chile: the influence of
the oxygen minimum layer. Sci. Mar. 64:69-77.
Morales, C.E., S. E. Hormazabal & J. L. Blanco, 1999.
Interannual variability in the mesoscale distribution of
the depth of the upper boundary of the oxygen minimum
layer off northern Chile (18-24S): Implications for the
pelagic system and biogeochemical cycling. J. Mar.
Gonzalez, R. & R. A. Quiqones. Pyruvate dehydrogenases
involved in anaerobic metabolism in polychaetes of the
continental shelf off central-south Chile. Estuar. Coast.
Paghs F., H. E. Gonzalez, M. Ramrn, M. Sobarzo & J.-M
Gili. Gelatinous zooplankton assemblages associated with
water masses in the Humboldt Current System and potential
predatory impact by Bassia bassensis (Siphonophora:
Calycophorae). Mar. Ecol. Prog. Ser.
Quiqones, R. A., Y. Eissler, G. Daneri &
V. Dellarossa. Microplanktonic respiration off
central-north Chile (Coquimbo, 30:S) during 1994-1997.
J. Plankton Res. (Accepted)
Gonzalez, R. R. & R. A. Quiqones. LDH activity in
Euphausia mucronata and Calanus chilensis: implications
for vertical migration behavior. J. Plankton Res.
Ulloa, O., R. Escribano, S. E. Hormazabal, R. A.
Quinones, R. Gonzalez & M. Ramos. Evolution and biological
effects of the 1997-98 El Nino in the upwelling ecosystem
off northern Chile. Geoph. Res. Lett.
Yaikin, J., R. A. Quinones & R. Gonzalez. Aerobic
respiration rate and anaerobic enzymatic activity of
Petrolisthes laevigatus (Anomura, Porcellanidae) under
laboratory conditions. J. Crust. Biology.
Creation and Review Dates
DIF Creation Date: 2001-10-15
Last DIF Revision Date: 2007-09-19