Gauging oxygen risk and tolerance for the megafauna of the Southern California shelf based on in situ observation, species mobility, and seascape

Author:

Parnell P Ed1ORCID,Levin Lisa A1,Navarro Michael O12

Affiliation:

1. Integrative Oceanography Division, Scripps Institution of Oceanography, UC San Diego

2. Department of Natural Sciences, University of Alaska Southeast, Juneau

Abstract

Abstract Oxygen decline poses increasing risks to global shelf communities. This study was conducted to measure species oxygen exposures in situ and to assess risks of low oxygen based on the hypothesis that species risk varies spatially and is dependent on the interaction of shelf oxygen dynamics with habitat pattern, species mobility, and tolerance to low oxygen. Here, we report concomitant observations of oxygen, depth, and habitat for the most common benthic and epibenthic megafauna on the southern California shelf (30–125 m). The study was conducted when oxygen concentrations were the lowest observed within the previous 30 years off southern California (2012–2014), yet hypoxic conditions (<1.42 ml l−1) were not observed. No significant oxygen exposure differences were observed among highly mobile, mobile, and sessile species due to the dynamic nature of the oxycline. Habitat affinities for the most abundant benthic megafauna (53 taxa) were discriminated among four different habitats. Highly mobile rockfish (Sebastidae) exhibited distributions suggesting less tolerance to low oxygen than most other taxa. Given the mosaic of consolidated and coarse-grained habitats that rockfish prefer, the onset of hypoxic conditions near the shelf break (∼90–120 m) would likely compress local rockfish populations into less favourable habitat in a non-linear fashion.

Publisher

Oxford University Press (OUP)

Subject

Ecology,Aquatic Science,Ecology, Evolution, Behavior and Systematics,Oceanography

Reference51 articles.

1. Oxygen consumption of the larvae of the lobster Panulirus interruptus (Randall) and the crab Cancer productus Randall;Belman;Comparative Biochemistry and Physiology Part A: Physiology,1973

2. Changes in source waters to the Southern California Bight;Bograd;Deep Sea Research Part II: Topical Studies in Oceanography,2015

3. Oxygen declines and the shoaling of the hypoxic boundary in the California Current;Bograd;Geophysical Research Letters,2008

4. Hypoxia, nitrogen, and fisheries: integrating effects across local and global landscapes;Breitburg;Annual Review of Marine Science,2009

5. Declining oxygen in the global ocean and coastal waters;Breitburg;Science,2018

Cited by 3 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3