dc.contributor.author
Kürten, Benjamin
dc.contributor.author
Zarokanellos, Nikolaos D.
dc.contributor.author
Devassy, Reny P.
dc.contributor.author
El-Sherbiny, Mohsen M.
dc.contributor.author
Struck, Ulrich
dc.contributor.author
Capone, Douglas G.
dc.contributor.author
Schulz, Isabelle K.
dc.contributor.author
Al-Aidaroos, Ali M.
dc.contributor.author
Irigoien, Xabier
dc.contributor.author
Jones, Burton H.
dc.date.accessioned
2019-07-10T11:07:36Z
dc.date.available
2019-07-10T11:07:36Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/25006
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-2761
dc.description.abstract
Hydrographic and atmospheric forcing set fundamental constraints on the biogeochemistry of aquatic ecosystems and manifest in the patterns of nutrient availability and recycling, species composition of communities, trophic dynamics, and ecosystem metabolism. In the Red Sea, latitudinal gradients in environmental conditions and primary production have been ascribed to fluctuations in Gulf of Aden Water inflow, upwelling/mixing, and regenerated nutrient utilization i.e. rapidly recycled nitrogen in upper layers. However, our understanding of upper layer dynamics and related changes in plankton communities, metabolism and carbon and nitrogen export is limited. We surmised that stratification and mesoscale eddies modulate the nutrient availability and taxonomic identity of plankton communities in the Red Sea. Based on remote-sensing data of sea level anomalies and high resolution in situ measurements (ScanFish) we selected stations for hydrographic CTD profiles, water sampling (nutrients, seawater oxygen stable isotopes [δ18OSW]), phytoplankton and zooplankton collections. In fall 2014, strong stratification subjected the plankton community to an overall nitrogen and phosphorus shortage. The nutrient deficiency increased numbers of heterotrophic dinoflagellates, microzooplankton, and diazotrophs (Trichodesmium, diatom-diazotroph associations [DDAs]), albeit largely decreased phytoplankton and mesozooplankton abundances. In spring 2015, mesoscale eddies increased the nutrient availability, and the thermohaline characteristics and low δ18OSW point to the interaction of eddies with Gulf of Aden Surface Water (GASW). Cyclonic eddies and, most likely, the availability of nutrients associated with the GASW, increased the abundances of autotrophs (diatoms, Prasinophytes) and supported larger numbers of zooplankton and their larvae. We demonstrate that the interplay of stratification, advection of Gulf of Aden water and mesoscale eddies are key elements to better understand changes in plankton community composition, ecosystem metabolism, and macronutrient export in the Red Sea in space and time.
en
dc.format.extent
18 Seiten
dc.rights.uri
https://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subject
Diatom-Diazotroph Associations (DDAs)
en
dc.subject
mesoscale eddies
en
dc.subject
biogeochemistry
en
dc.subject.ddc
500 Naturwissenschaften und Mathematik::550 Geowissenschaften, Geologie::551 Geologie, Hydrologie, Meteorologie
dc.title
Seasonal modulation of mesoscale processes alters nutrient availability and plankton communities in the Red Sea
dc.type
Wissenschaftlicher Artikel
dcterms.bibliographicCitation.doi
10.1016/j.pocean.2019.02.007
dcterms.bibliographicCitation.journaltitle
Progress in Oceanography
dcterms.bibliographicCitation.volume
173
dcterms.bibliographicCitation.url
https://doi.org/10.1016/j.pocean.2019.02.007
refubium.affiliation
Geowissenschaften
refubium.affiliation.other
Institut für Geologische Wissenschaften

refubium.resourceType.isindependentpub
no
dcterms.accessRights.openaire
open access
dcterms.isPartOf.issn
0079-6611