Seabird Trophic Position Across Three Ocean Regions Tracks Ecosystem Differences

被引：17

作者：

Gagne, Tyler O. ^{[1
]}

Hyrenbach, K. David ^{[2
]}

Hagemann, Molly E. ^{[3
]}

Bass, Oron L. ^{[4
]}

Pimm, Stuart L. ^{[5
]}

MacDonald, Mark ^{[6
]}

Peck, Brian ^{[7
]}

Van Houtan, Kyle S. ^{[1
,5
]}

机构：

[1] Monterey Bay Aquarium, Conservat & Res Dept, Monterey, CA 93940 USA

[2] Hawaii Pacific Univ, Marine Sci Programs Ocean Inst, Dept Nat Sci, Honolulu, HI USA

[3] Bernice Pauahi Bishop Museum, Vertebrate Zool Collect, Honolulu, HI USA

[4] Everglades Natl Pk, South Florida Nat Resources Ctr, Homestead, FL USA

[5] Duke Univ, Nicholas Sch Environm, Durham, NC 27708 USA

[6] Dept Marine & Wildlife Resources, Pago Pago, VI USA

[7] US Fish & Wildlife Serv, Rose Atoli Marine Natl Monument, Pago Pago, VI USA

来源：

FRONTIERS IN MARINE SCIENCE | 2018年 / 5卷

关键词：

trophic ecology; commercial fisheries; ocean memory; global change; machine learning; stable isotopes; food webs; STABLE-ISOTOPES; MARINE; ECOLOGY; INDICATORS; IMPACTS;

D O I：

10.3389/fmars.2018.00317

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

We analyze recently collected feather tissues from two species of seabirds, the sooty tern (Onychoprion fuscatus) and brown noddy (Anus stolidus), in three ocean regions (North Atlantic, North Pacific, and South Pacific) with different human impacts. The species are similar morphologically and in the trophic levels from which they feed within each location. In contrast, we detect reliable differences in trophic position amongst the regions. Trophic position appears to decline as the intensity of commercial fishing increases, and is at its lowest in the Caribbean. The spatial gradient in trophic position we document in these regions exceeds those detected over specimens from the last 130 years in the Hawaiian Islands. Modeling suggests that climate velocity and human impacts on fish populations strongly align with these differences.

引用

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