Evidence map›Paper›PMID 27990490›Full record

ArticleScience advances2016

Long photoperiods sustain high pH in Arctic kelp forests.

Dorte Krause-Jensen, Núria Marbà, Marina Sanz-Martin, Iris E Hendriks, Jakob Thyrring, Jacob Carstensen, Mikael Kristian Sejr, Carlos M Duarte

Open access · goldAbstract read
In one paragraph

Article in Science advances, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed, 1 pooled it
6.7field-weighted citation impact, top 3% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

14 citing papers in PubMed, 1 synthesis or guideline pooled it, 91 citations in OpenAlex.

  1. Pooled it
  2. Natural Kelp (Gels (Basel, Switzerland) · 2025
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors at 3 institutions in 4 countries.

Dorte Krause-JensenArctic Research Centre, Aarhus University, Ny Munkegade 114, Building 1540, 8000 Århus C, Denmark.; Department of Bioscience, Aarhus University, Vejlsøvej 25, DK-8600 Silkeborg, Denmark.ORCID 0000-0001-9792-256X
Núria MarbàDepartment of Global Change Research, Institut Mediterrani d'Estudis Avançats (Consejo Superior de Investigaciones Científicas-Universidad de las Islas Baleares), Miquel Marquès 21, 07190 Esporles, Spain.ORCID 0000-0002-8048-6789
Marina Sanz-MartinDepartment of Global Change Research, Institut Mediterrani d'Estudis Avançats (Consejo Superior de Investigaciones Científicas-Universidad de las Islas Baleares), Miquel Marquès 21, 07190 Esporles, Spain.; Facultat de Geologia, Universitat de Barcelona, 08028 Barcelona, Spain.ORCID 0000-0002-9777-5894
Iris E HendriksDepartment of Global Change Research, Institut Mediterrani d'Estudis Avançats (Consejo Superior de Investigaciones Científicas-Universidad de las Islas Baleares), Miquel Marquès 21, 07190 Esporles, Spain.ORCID 0000-0002-2238-6018
Jakob ThyrringArctic Research Centre, Aarhus University, Ny Munkegade 114, Building 1540, 8000 Århus C, Denmark.; Department of Bioscience, Aarhus University, Vejlsøvej 25, DK-8600 Silkeborg, Denmark.ORCID 0000-0002-1029-3105
Jacob CarstensenDepartment of Bioscience, Aarhus University, Frederiksborgvej 399, DK-4000 Roskilde, Denmark.ORCID 0000-0003-0016-6118
Mikael Kristian SejrArctic Research Centre, Aarhus University, Ny Munkegade 114, Building 1540, 8000 Århus C, Denmark.; Department of Bioscience, Aarhus University, Vejlsøvej 25, DK-8600 Silkeborg, Denmark.
Carlos M DuarteKing Abdullah University of Science and Technology, Red Sea Research Center, Thuwal 23955-6900, Kingdom of Saudi Arabia.; Faculty of Biosciences, Fisheries and Economics, University of Tromsø, Tromsø, Norway.ORCID 0000-0002-1213-1361
Aarhus University · DKMediterranean Institute for Advanced Studies · ESKing Abdullah University of Science and Technology · SA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Concern on the impacts of ocean acidification on calcifiers, such as bivalves, sea urchins, and foraminifers, has led to efforts to understand the controls on pH in their habitats, which include kelp forests and seagrass meadows. The metabolism of these habitats can lead to diel fluctuation in pH with increases during the day and declines at night, suggesting no net effect on pH at time scales longer than daily. We examined the capacity of subarctic and Arctic kelps to up-regulate pH in situ and experimentally tested the role of photoperiod in determining the capacity of Arctic macrophytes to up-regulate pH. Field observations at photoperiods of 15 and 24 hours in Greenland combined with experimental manipulations of photoperiod show that photoperiods longer than 21 hours, characteristic of Arctic summers, are conducive to sustained up-regulation of pH by kelp photosynthesis. We report a gradual increase in pH of 0.15 units and a parallel decline in pCO

Indexed as

PhotoperiodArctic RegionsGreenlandHydrogen-Ion ConcentrationKelpPhotosynthesisSeawateracidificationArctic kelpmacrophytesmetabolismpHphotoperiodPhotosynthesisplant-climate interactionsrespiration

Identifiers

PMID27990490
PMCPMC5156516
OpenAlexW2566258754

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.