Temporal latitudinal-gradient dynamics and tropical instability of deep-sea species diversity

Moriaki Yasuhara; Gene Hunt; Thomas M. Cronin; Hisayo Okahashi

doi:10.1073/pnas.0910935106

Temporal latitudinal-gradient dynamics and tropical instability of deep-sea species diversity

Moriaki Yasuhara, Gene Hunt, Thomas M. Cronin, Hisayo Okahashi

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

98 Citations (Scopus)

Abstract

A benthic microfaunal record from the equatorial Atlantic Ocean over the past four glacial-interglacial cycles was investigated to understand temporal dynamics of deep-sea latitudinal species diversity gradients (LSDGs). The results demonstrate unexpected instability and high amplitude fluctuations of species diversity in the tropical deep ocean that are correlated with orbital-scale oscillations in global climate: Species diversity is low during glacial and high during interglacial periods. This implies that climate severely influences deep-sea diversity, even at tropical latitudes, and that deep-sea LSDGs, while generally present for the last 36 million years, were weakened or absent during glacial periods. Temporally dynamic LSDGs and unstable tropical diversity require reconsideration of current ecological hypotheses about the generation and maintenance of biodiversity as they apply to the deep sea, and underscore the potential vulnerability and conservation importance of tropical deep-sea ecosystems.

Original language	English
Pages (from-to)	21717-21720
Journal	Proceedings of the National Academy of Sciences of the United States of America
Volume	106
Issue number	51
DOIs	https://doi.org/10.1073/pnas.0910935106
Publication status	Published - 22 Dec 2009
Externally published	Yes

Bibliographical note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to <a href="mailto:[email protected]">[email protected]</a>.

Funding

We thank H. J. Dowsett, D. A. Willard, and two anon-ymous referees for constructively critical reviews, J. Dyszynski for sampleprocessing, and W. B. Curry for ODP 925 isotope and composite data. Thisresearch used samples provided by the Integrated Ocean Drilling Program(IODP). This work was supported by a Smithsonian Postdoctoral Fellowship, aSmithsonian Marine Science Network Postdoctoral Fellowship, and JapanSociety for the Promotion of Science Postdoctoral Fellowships for ResearchAbroad (to M.Y.).

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 13 Climate Action
SDG 14 Life Below Water

Research Keywords

Deep-sea Ostracoda
Global climate change
Latitudinal species diversity gradients
Macroecology
Quaternary paleoceanography

Access Output

10.1073/pnas.0910935106

Other Access Options

Check CityUHK Library

Permanent Link

Right click to copy link

Cite this

@article{90253974606b41d4a8b0adad5d0237b6,

title = "Temporal latitudinal-gradient dynamics and tropical instability of deep-sea species diversity",

abstract = "A benthic microfaunal record from the equatorial Atlantic Ocean over the past four glacial-interglacial cycles was investigated to understand temporal dynamics of deep-sea latitudinal species diversity gradients (LSDGs). The results demonstrate unexpected instability and high amplitude fluctuations of species diversity in the tropical deep ocean that are correlated with orbital-scale oscillations in global climate: Species diversity is low during glacial and high during interglacial periods. This implies that climate severely influences deep-sea diversity, even at tropical latitudes, and that deep-sea LSDGs, while generally present for the last 36 million years, were weakened or absent during glacial periods. Temporally dynamic LSDGs and unstable tropical diversity require reconsideration of current ecological hypotheses about the generation and maintenance of biodiversity as they apply to the deep sea, and underscore the potential vulnerability and conservation importance of tropical deep-sea ecosystems.",

keywords = "Deep-sea Ostracoda, Global climate change, Latitudinal species diversity gradients, Macroecology, Quaternary paleoceanography",

author = "Moriaki Yasuhara and Gene Hunt and Cronin, {Thomas M.} and Hisayo Okahashi",

note = "Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to <a href={"}mailto:[email protected]{"}>[email protected]</a>.",

year = "2009",

month = dec,

day = "22",

doi = "10.1073/pnas.0910935106",

language = "English",

volume = "106",

pages = "21717--21720",

journal = "Proceedings of the National Academy of Sciences of the United States of America",

issn = "0027-8424",

publisher = "National Academy of Sciences",

number = "51",

}

Temporal latitudinal-gradient dynamics and tropical instability of deep-sea species diversity. / Yasuhara, Moriaki; Hunt, Gene; Cronin, Thomas M. et al.
In: Proceedings of the National Academy of Sciences of the United States of America, Vol. 106, No. 51, 22.12.2009, p. 21717-21720.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

TY - JOUR

T1 - Temporal latitudinal-gradient dynamics and tropical instability of deep-sea species diversity

AU - Yasuhara, Moriaki

AU - Hunt, Gene

AU - Cronin, Thomas M.

AU - Okahashi, Hisayo

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to <a href="mailto:[email protected]">[email protected]</a>.

PY - 2009/12/22

Y1 - 2009/12/22

N2 - A benthic microfaunal record from the equatorial Atlantic Ocean over the past four glacial-interglacial cycles was investigated to understand temporal dynamics of deep-sea latitudinal species diversity gradients (LSDGs). The results demonstrate unexpected instability and high amplitude fluctuations of species diversity in the tropical deep ocean that are correlated with orbital-scale oscillations in global climate: Species diversity is low during glacial and high during interglacial periods. This implies that climate severely influences deep-sea diversity, even at tropical latitudes, and that deep-sea LSDGs, while generally present for the last 36 million years, were weakened or absent during glacial periods. Temporally dynamic LSDGs and unstable tropical diversity require reconsideration of current ecological hypotheses about the generation and maintenance of biodiversity as they apply to the deep sea, and underscore the potential vulnerability and conservation importance of tropical deep-sea ecosystems.

AB - A benthic microfaunal record from the equatorial Atlantic Ocean over the past four glacial-interglacial cycles was investigated to understand temporal dynamics of deep-sea latitudinal species diversity gradients (LSDGs). The results demonstrate unexpected instability and high amplitude fluctuations of species diversity in the tropical deep ocean that are correlated with orbital-scale oscillations in global climate: Species diversity is low during glacial and high during interglacial periods. This implies that climate severely influences deep-sea diversity, even at tropical latitudes, and that deep-sea LSDGs, while generally present for the last 36 million years, were weakened or absent during glacial periods. Temporally dynamic LSDGs and unstable tropical diversity require reconsideration of current ecological hypotheses about the generation and maintenance of biodiversity as they apply to the deep sea, and underscore the potential vulnerability and conservation importance of tropical deep-sea ecosystems.

KW - Deep-sea Ostracoda

KW - Global climate change

KW - Latitudinal species diversity gradients

KW - Macroecology

KW - Quaternary paleoceanography

UR - http://www.scopus.com/inward/record.url?scp=76049093133&partnerID=8YFLogxK

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-76049093133&origin=recordpage

U2 - 10.1073/pnas.0910935106

DO - 10.1073/pnas.0910935106

M3 - RGC 21 - Publication in refereed journal

C2 - 20018702

SN - 0027-8424

VL - 106

SP - 21717

EP - 21720

JO - Proceedings of the National Academy of Sciences of the United States of America

JF - Proceedings of the National Academy of Sciences of the United States of America

IS - 51

ER -

Temporal latitudinal-gradient dynamics and tropical instability of deep-sea species diversity

Abstract

Bibliographical note

Funding

UN SDGs

Research Keywords

Access Output

Other Access Options

Permanent Link

Other Files and Links

Fingerprint

Cite this