A5062511196- Marine and coastal ecosystems
- Marine Biology and Ecology Research
- Isotope Analysis in Ecology
- Marine and fisheries research
- Marine Bivalve and Aquaculture Studies
- Oceanographic and Atmospheric Processes
- Marine and environmental studies
- Ocean Acidification Effects and Responses
- Microbial Community Ecology and Physiology
- Marine Ecology and Invasive Species
- Coral and Marine Ecosystems Studies
- Global Energy and Sustainability Research
- Food Industry and Aquatic Biology
- Mercury impact and mitigation studies
- Geophysics and Gravity Measurements
- Cephalopods and Marine Biology
- Heavy metals in environment
- Marine animal studies overview
- Marine Invertebrate Physiology and Ecology
- Marine and coastal plant biology
- Geological formations and processes
- Coastal and Marine Management
- Underwater Vehicles and Communication Systems
- Ichthyology and Marine Biology
- Cyclone Separators and Fluid Dynamics
Universität Hamburg
2011-2024
Hamburg Institut (Germany)
2018-2020
Landesforschungsanstalt für Landwirtschaft und Fischerei Mecklenburg-Vorpommern
1997-1999
Exploring climate and anthropogenic impacts on marine ecosystems requires an understanding of how trophic components interact. However, integrative end-to-end ecosystem studies (experimental and/or modelling) are rare. Experimental investigations often concentrate a particular group or individual species within level, while tropho-dynamic field typically employ either bottom-up approach concentrating the phytoplankton community top-down fish community. Likewise emphasis modelling is usually...
Abstract The biological pump transports organic carbon produced by photosynthesis to the meso- and bathypelagic zones, latter removing from exchanging with atmosphere over centennial time scales. Organisms living in both zones are supported a passive flux of particles, transported deep-sea through vertical zooplankton migrations. Here we report globally-coherent positive relationships between biomass epi-, meso-, layers average net primary production (NPP). We do so based on global...
Abundance and stable isotope composition of large small mesozooplankton were analyzed in samples taken with 333 100 μm nets, respectively, at four sites the eastern Mediterranean down to 4200 m depth October 2001. Large (333 nets) was sieved into five size fractions, δ13C δ15N values fractions measured as well total (100 specific taxa. These measurements allow insights source diet trophic level relative sinking suspended particulate organic matter. Overall, biomass abundance zooplankton low,...
Organic carbon flux and zooplankton consumption rates were measured in the deep water of eastern Mediterranean. Standardized higher than open ocean, probably due to elevated temperature ∼14°C bathypelagic zone The absolute rates, however, very low, reflecting oligotrophic character basin. Zooplankton estimated consume 23% sinking between 1050 m 4250 m. Owing high Levantine deep‐sea, losses from calculated by Martin equation are underestimated, total may occur. Lucicutia longiserrata, an...
In October 2010, the vertical distribution, biodiversity and maturity stages of Chaetognatha species were investigated at four stations located off Walvis Bay, Namibia. Seventeen detected classified as pelagic, shallow-mesopelagic, deep-mesopelagic bathypelagic based upon weighted mean depth derived from their average distribution. High abundances found in upper 100 m all Bay transect with a maximum value 20837 ind. 1000 m−3 outer shelf station near surface. The community was dominated by...
The northern Benguela Upwelling System (nBUS) has been facing increasing temperatures and decreasing dissolved oxygen (DO) levels over the last decades. This implications for key processes trophic interactions within ecosystem including shifts in community composition, distribution ranges, levels, changes energy flows migration patterns with feedbacks to biogeochemical processes. Here we summarise results gained from GENUS project (Geochemistry Ecology of Namibian System) focussing on...
Abstract Oceanographic and hydroacoustic data were obtained by the Instituto del Mar Peru ( IMARPE ) during 72 cruises off Peruvian coast between 1985 2017 to determine ranges of abiotic parameters influencing anchovy (anchoveta) distribution observe effect 1997–1998 El Niño event. The show a high seasonal variability in anchoveta related differences environmental as well changes after very strong event 1997–1998. Geostatistic variograms used describe generalized additive models GAM s) with...
The Benguela Upwelling System in the southeast Atlantic Ocean is of crucial socio-economic importance due to its high productivity. However, predicting response global change and understanding past changes are still great challenges. Here, we compile data obtained from a research cruise an oceanographic mooring demonstrate that topographically steered nutrient trapping zone develops narrow belt along coast during main upwelling season austral spring summer southern System. High...
Mesozooplankton samples were collected throughout the water column in 4270 m deep Ierapetra basin, 30 nm SE off Crete, April 1999. Information on trophic relationships within mesozooplankton size classes (<0.5, 0.5–1, 1–2, and 2–5 mm) sources of diet obtained by measuring composition stable nitrogen isotopes size‐fractionated zooplankton particles sediment traps. Compared to data from Arabian Sea, δ 15 N values markedly lower Levantine Sea. Data upper 250 (2–3‰) suggest that 2 atmosphere...
Abstract Zooplankton samples from the eastern Mediterranean were collected in April/May 1999 with a multiple opening and closing net (mesh size 333 μ m) to examine distribution taxonomic composition of mesozooplankton, mainly Calanoida (Copepoda), some years after onset Eastern Transient (EMT), climatically induced shift hydrography. The seven stations on transect Ionian Sea part Levantine Basin at closely spaced vertical intervals surface water depths 4250 m. Data January 1987, June 1993,...
MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout JournalEditorsTheme Sections 179:27-40 (1999) - doi:10.3354/meps179027 Temporal changes of deep-sea mesozooplankton abundance in temperate NE Atlantic and estimates carbon budget Rolf Koppelmann*, Horst Weikert Institut für Hydrobiologie und Fischereiwissenschaft, Zeiseweg 9, D-22765 Hamburg, Germany *E-mail: koppelmann@uni-hamburg.de...