Mesozooplankton biomass and temperature-enhanced grazing along a 110°E transect in the eastern Indian Ocean

Low-lattude waters of the Indian Ocean are warming faster than other major oceans. Most models predict a zooplankton decline due to lower productivity, enhanced metabolism and phytoplankton size shifts that reduce trophic transfer efficiency. In May−June 2019, we investigated mesozooplankton biomass...

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Bibliographic Details
Published in:Marine ecology. Progress series (Halstenbek) 2020-09, Vol.649, p.1-19
Main Authors: Landry, Michael R., Hood, Raleigh R., Davies, Claire H.
Format: Article
Language:English
Subjects:
Biomass
Climate change
Climate effects
Dry weight
Euphotic zone
Expeditions
FEATURE ARTICLE
Fluorescence
Food chains
Food webs
Grazing
Herbivory
Ingestion
Latitude
Metabolic rate
Metabolism
Mixotrophy
Ocean models
Oceans
Phytoplankton
Plankton
Temperature effects
Tropical climate
Zooplankton
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Summary:Low-lattude waters of the Indian Ocean are warming faster than other major oceans. Most models predict a zooplankton decline due to lower productivity, enhanced metabolism and phytoplankton size shifts that reduce trophic transfer efficiency. In May−June 2019, we investigated mesozooplankton biomass and grazing along the historic 110° E transect line from the International Indian Ocean Expedition (IIOE) of the 1960s. Twenty sampling stations from 39.5 to 11.5° S spanned latitudinal variability from temperate to tropical waters and a pronounced 14°C gradient in mean euphotic zone temperature. Although mesozooplankton size structure was similar along the transect, with smaller (
ISSN:0171-8630
1616-1599
DOI:10.3354/meps13444