Abstract
Diurnal vertical migration (DVM) is a widespread phenomenon in the upper ocean, but it remains unclear to what degree it also involves passively transported micro- and meso-zooplankton. These organisms are difficult to monitor by in situ sensing and observations from discrete samples are often inconclusive. Prime examples of such ambiguity are planktonic foraminifera, where contradictory evidence for DVM continues to cast doubt on the stability of species vertical habitats, which introduces uncertainties in geochemical proxy interpretation. To provide a robust answer, we carried out highly replicated randomized sampling with 41 vertically resolved plankton net hauls taken within 26 hours in a confined area of 400 km 2 in the tropical North Atlantic, where DVM in larger plankton occurs. Manual enumeration of planktonic foraminifera cell density consistently reveals the highest total cell concentrations in the surface mixed layer (top 50 m) and analysis of cell density in seven individual species representing different shell sizes, life strategies and presumed depth habitats reveals consistent vertical habitats not changing over the 26 hours sampling period. These observations robustly reject the existence of DVM in planktonic foraminifera in a setting where DVM occurs in other organisms.
| Original language | English |
|---|---|
| Pages (from-to) | 127-141 |
| Number of pages | 15 |
| Journal | Journal of Plankton Research |
| Volume | 41 |
| Issue number | 2 |
| Early online date | 25 Feb 2019 |
| DOIs | |
| Publication status | Published - Mar 2019 |
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Keywords
- North Atlantic
- patchiness
- planktonic foraminifera
- vertical habitat
- Zooplankton
Cite this
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Highly replicated sampling reveals no diurnal vertical migration but stable species-specific vertical habitats in planktonic foraminifera. / Meilland, Julie; Siccha, Michael; Weinkauf, Manuel F.G.; Jonkers, Lukas; Morard, Raphael; Baranowski, Ulrike; Baumeister, Adrian; Bertlich, Jacqueline; Brummer, Geert Jan; Debray, Paul; Fritz-Endres, Theresa; Groeneveld, Jeroen; Magerl, Leonard; Munz, Philipp; Rillo, Marina C.; Schmidt, Christiane; Takagi, Haruka; Theara, Gurjit; Kucera, Michal.
In: Journal of Plankton Research, Vol. 41, No. 2, 03.2019, p. 127-141.Research output: Contribution to Journal › Article › Academic › peer-review
TY - JOUR
T1 - Highly replicated sampling reveals no diurnal vertical migration but stable species-specific vertical habitats in planktonic foraminifera
AU - Meilland, Julie
AU - Siccha, Michael
AU - Weinkauf, Manuel F.G.
AU - Jonkers, Lukas
AU - Morard, Raphael
AU - Baranowski, Ulrike
AU - Baumeister, Adrian
AU - Bertlich, Jacqueline
AU - Brummer, Geert Jan
AU - Debray, Paul
AU - Fritz-Endres, Theresa
AU - Groeneveld, Jeroen
AU - Magerl, Leonard
AU - Munz, Philipp
AU - Rillo, Marina C.
AU - Schmidt, Christiane
AU - Takagi, Haruka
AU - Theara, Gurjit
AU - Kucera, Michal
PY - 2019/3
Y1 - 2019/3
N2 - Diurnal vertical migration (DVM) is a widespread phenomenon in the upper ocean, but it remains unclear to what degree it also involves passively transported micro- and meso-zooplankton. These organisms are difficult to monitor by in situ sensing and observations from discrete samples are often inconclusive. Prime examples of such ambiguity are planktonic foraminifera, where contradictory evidence for DVM continues to cast doubt on the stability of species vertical habitats, which introduces uncertainties in geochemical proxy interpretation. To provide a robust answer, we carried out highly replicated randomized sampling with 41 vertically resolved plankton net hauls taken within 26 hours in a confined area of 400 km 2 in the tropical North Atlantic, where DVM in larger plankton occurs. Manual enumeration of planktonic foraminifera cell density consistently reveals the highest total cell concentrations in the surface mixed layer (top 50 m) and analysis of cell density in seven individual species representing different shell sizes, life strategies and presumed depth habitats reveals consistent vertical habitats not changing over the 26 hours sampling period. These observations robustly reject the existence of DVM in planktonic foraminifera in a setting where DVM occurs in other organisms.
AB - Diurnal vertical migration (DVM) is a widespread phenomenon in the upper ocean, but it remains unclear to what degree it also involves passively transported micro- and meso-zooplankton. These organisms are difficult to monitor by in situ sensing and observations from discrete samples are often inconclusive. Prime examples of such ambiguity are planktonic foraminifera, where contradictory evidence for DVM continues to cast doubt on the stability of species vertical habitats, which introduces uncertainties in geochemical proxy interpretation. To provide a robust answer, we carried out highly replicated randomized sampling with 41 vertically resolved plankton net hauls taken within 26 hours in a confined area of 400 km 2 in the tropical North Atlantic, where DVM in larger plankton occurs. Manual enumeration of planktonic foraminifera cell density consistently reveals the highest total cell concentrations in the surface mixed layer (top 50 m) and analysis of cell density in seven individual species representing different shell sizes, life strategies and presumed depth habitats reveals consistent vertical habitats not changing over the 26 hours sampling period. These observations robustly reject the existence of DVM in planktonic foraminifera in a setting where DVM occurs in other organisms.
KW - North Atlantic
KW - patchiness
KW - planktonic foraminifera
KW - vertical habitat
KW - Zooplankton
UR - http://www.scopus.com/inward/record.url?scp=85064282440&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85064282440&partnerID=8YFLogxK
U2 - 10.1093/plankt/fbz002
DO - 10.1093/plankt/fbz002
M3 - Article
VL - 41
SP - 127
EP - 141
JO - Journal of Plankton Research
JF - Journal of Plankton Research
SN - 0142-7873
IS - 2
ER -