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Exploring Connections Between Mesope...

Iglesias, Ilysa S.,

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Exploring Connections Between Mesopelagic Ecosystems, Epipelagic Predators, and a Changing Ocean Climate in the California Current /

Record Type:	Electronic resources : Monograph/item
Title/Author:	Exploring Connections Between Mesopelagic Ecosystems, Epipelagic Predators, and a Changing Ocean Climate in the California Current // Ilysa S Iglesias.
Author:	Iglesias, Ilysa S.,
Description:	1 electronic resource (179 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 86-02, Section: B.
Contained By:	Dissertations Abstracts International86-02B.
Subject:	Biological oceanography. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31329860
ISBN:	9798383284308

Exploring Connections Between Mesopelagic Ecosystems, Epipelagic Predators, and a Changing Ocean Climate in the California Current /
Iglesias, Ilysa S.,

Exploring Connections Between Mesopelagic Ecosystems, Epipelagic Predators, and a Changing Ocean Climate in the California Current /Ilysa S Iglesias. - 1 electronic resource (179 pages)

Source: Dissertations Abstracts International, Volume: 86-02, Section: B.

The deep-pelagic ocean represents one of the largest biomes, and is home to a diverse assemblage of organisms, whose collective vertical movements represent the greatest migration on earth. Deep-pelagic environments and denizens are often defined by their distance and distinctness from surface ecosystems. However, in this dissertation, I explore how mesopelagic communities are interconnected to pelagic food webs and impacted by changing oceanographic conditions at the surface. Focusing on the California Current, we use a combination of diet data, fisheries acoustics, and downscaled climate projections to investigate the role of mesopelagic fishes as prey to higher trophic level predators, the effects of a large marine heatwave on the deep scattering community, and the compression of mesopelagic habitat projected by the end of the 21st century. Our results suggest that mesopelagic communities provide prey for numerous federally managed and protected species, adjust their vertical position in response to marine heatwave events, and will experience vertical habitat compression as low oxygen conditions shoal due to global climate change. As anthropogenic threats to exploit and alter deep-pelagic ecosystems rise, our work demonstrates the need to consider more carefully the role of mesopelagic communities in supporting healthy and functioning ocean ecosystems.

English

ISBN: 9798383284308Subjects--Topical Terms:

2122748
Biological oceanography.
Subjects--Index Terms:

Epipelagic-mesopelagic coupling

Exploring Connections Between Mesopelagic Ecosystems, Epipelagic Predators, and a Changing Ocean Climate in the California Current /
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245 1 0 $a Exploring Connections Between Mesopelagic Ecosystems, Epipelagic Predators, and a Changing Ocean Climate in the California Current / $c Ilysa S Iglesias.
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520 $a The deep-pelagic ocean represents one of the largest biomes, and is home to a diverse assemblage of organisms, whose collective vertical movements represent the greatest migration on earth. Deep-pelagic environments and denizens are often defined by their distance and distinctness from surface ecosystems. However, in this dissertation, I explore how mesopelagic communities are interconnected to pelagic food webs and impacted by changing oceanographic conditions at the surface. Focusing on the California Current, we use a combination of diet data, fisheries acoustics, and downscaled climate projections to investigate the role of mesopelagic fishes as prey to higher trophic level predators, the effects of a large marine heatwave on the deep scattering community, and the compression of mesopelagic habitat projected by the end of the 21st century. Our results suggest that mesopelagic communities provide prey for numerous federally managed and protected species, adjust their vertical position in response to marine heatwave events, and will experience vertical habitat compression as low oxygen conditions shoal due to global climate change. As anthropogenic threats to exploit and alter deep-pelagic ecosystems rise, our work demonstrates the need to consider more carefully the role of mesopelagic communities in supporting healthy and functioning ocean ecosystems.
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653 $a Epipelagic-mesopelagic coupling
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653 $a Twilight zone
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