The trophodynamics of marine top predators: current knowledge, recent advances and challenges

Young, Jock W., Hunt, Brian P.V., Cook, Timothée R., Llopiz, Joel K., Hazen, Elliott L., Pethybridge, Heidi R., Ceccarelli, Daniela, Lorrain, Anne, Olson, Robert J., Allain, Valerie, Menkes, Christophe, Patterson, Toby, Nicol, Simon, Lehodey, Patrick, Kloser, Rudy J., Arrizabalaga, Haritz, and Choy, C. Anela (2015) The trophodynamics of marine top predators: current knowledge, recent advances and challenges. Deep-Sea Research Part II: topical studies in oceanography, 113. pp. 170-187.

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Abstract

We review present understanding of the spatial and temporal diet variability (trophodynamics) of a range of pelagic marine top predators, at both early and adult life history stages. We begin with a review of methodologies used to advance our understanding of the trophodynamics of marine top predators, particularly in relation to climate change. We then explore how these developments are informing our understanding of the major trophic groups in food webs leading to, and including, marine top predators. We examine through specific examples how the impacts of ocean warming may affect pelagic food web relationships from both top-down and bottom-up perspectives. We examine the potential, in the absence of long-term data sets, of using large-scale spatial studies to examine how potential changes in biological oceanography could impact the biomass and composition of prey species, particularly the role of phytoplankton size spectra. We focus on examples from regions where biotic change with respect to climate change is likely. In particular, we detail the effects of climate change on oceanographic and bathymetric 'hotspots' and provide the example involving seabirds in the Benguela Current system. We end by urging the development of international collaborations and databases to facilitate comprehensive ocean-scale understanding of climate impacts on marine top predators.

Item ID: 41625
Item Type: Article (Research - C1)
ISSN: 1879-0100
Keywords: top predators; trophodynamics; micronekton; bottom-up processes; hotspots; climate change
Funders: European Union FP7, Claude Leon Foundation, CSIRO, Penzance Endowed Fund for Assistant Scientists, Cooperative Institute for the North Atlantic Region, Woods Hole Oceanographic Institution, USA, Spanish Ministry of Economy and Competitiveness (MECD)
Projects and Grants: EU FP7 ISOZOO 302010, MECD CTM2011-27505
Date Deposited: 08 Dec 2015 16:29
FoR Codes: 05 ENVIRONMENTAL SCIENCES > 0501 Ecological Applications > 050101 Ecological Impacts of Climate Change @ 100%
SEO Codes: 96 ENVIRONMENT > 9603 Climate and Climate Change > 960301 Climate Change Adaptation Measures @ 100%
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