Controls of plankton production by pelagic fish predation and resource availability in the Alboran and Balearic Seas

Date

2013-05-01

Author

Oguz, Temel
Macias, Diego
Renault, Lionel
Ruiz, Javier
Tintore, Joaquin

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

172
views

0
downloads

A one-dimensional coupled physical and intermediate-complexity biochemical model comprising large and small phytoplankton and zooplankton groups, particulate organic nitrogen, ammonium and nitrate was developed to study the physical-biogeochemical interactions and parameters that control plankton production in the Alboran and Balearic Sea ecosystems. The model findings suggest that pelagic fish predation and resource availability through lateral and vertical nutrient inputs jointly characterize the plankton community structures. In agreement with previous observations, a typical annual plankton structure of the mesotrophic systems involves a vertically homogeneous biomass of large groups of phytoplankton and zooplankton within the upper 50-to-100 m layer from mid-November to April and a subsurface biomass accumulation distributed roughly within 25-75 m depths in the following months. Their light and temperature limitations constrain the smaller groups into the thermocline zone (25-50 m) during late spring and summer. These obtained results were dependent on the zooplankton actively switching between preys (i.e., the food preference coefficients dependent on prey biomass). In the case of no switching, spurious dynamic equilibrium solutions may arise in the case of a constant and weak fish predation rate and using the quadratic predation formulation. The choice of a Holling Type II (i.e., hyperbolic) predation function may, however avoid ambiguous representation of the annual plankton structure in the case of a constant food preference choice under relatively weak predation pressures.

Subject Keywords

Aquatic Science, Geology

URI

https://hdl.handle.net/11511/67901

Journal

PROGRESS IN OCEANOGRAPHY

DOI

https://doi.org/10.1016/j.pocean.2013.03.001

Collections

Graduate School of Marine Sciences, Article

Suggestions

OpenMETU
Core

Controls on carbon export in the subtropical North Atlantic Yumruktepe, Veli Caglar; Salihoğlu, Barış; Neuer, Susanne (Elsevier BV, 2020-08-01) We present a lower trophic level pelagic ecosystem model that allows the investigation of the role of hydrography, bacterial remineralization and detritus consumption on the strength of carbon export and its attenuation. We apply the model to investigate the controls on the carbon export at the Bermuda Atlantic Time-Series Study site (BATS) and the European Station for Time series in the Ocean, Canary Islands (ESTOC) in the subtropical North Atlantic. In previous field studies, export ratios at 200 m (the r...
Role of planktonic bacteria in biodegradation of fish-exuded kairomone in laboratory bioassays of diel vertical migration Beklioglu, M; Gözen, Ayşe Gül; Zorlu, P; Ay-Zog, D (Schweizerbart, 2006-01-01) Daphnia, freshwater crustaceans that graze algae, often rely on predatory chemical cues termed kairomones as signals for predator-avoidance. Using laboratory bioassays, we studied how planktonic bacteria may modify kairomone activity. We measured the amplitude of diel vertical migration (DVM) of Daphnia pulex DE GEER among treatments with different amounts of bacteria. We used temperature incubation to increase bacterial densities and filtration to reduce abundance. Daphnids exposed to fish cue (F) and filt...
Parameterization of iron and manganese cycling in the Black Sea suboxic and anoxic environment Konovalov, S; Samodurov, A; Oguz, T; Ivanov, L (Elsevier BV, 2004-12-01) New and published data on the distribution and speciation of manganese and iron in seawater are analyzed to identify and parameterize major biogeochemical processes of their cycling within the suboxic (similar to15.6less than or equal tosigma(t)less than or equal tosimilar to16.2) and anoxic layers (sigma(t)less than or equal tosimilar to16.2) of the Black Sea. A steady-state transport-reaction model is applied to reveal layering and parameterize kinetics of redox and dissolution/precipitation processes. Pr...
Fish and mucus-dwelling bacteria interact to produce a kairomone that induces diel vertical migration in Daphnia Beklioğlu, Meryem; Gözen, Ayşe Gül (Wiley, 2006-12-01) 1. Bacterial populations associated with fish have previously been documented to be crucial for the production of chemical signals governing the interactions between predator fish and zooplankton prey.
The role of mesoscale processes controlling biological variability in the Black Sea coastal waters: inferences from SeaWIFS-derived surface chlorophyll field Oguz, T; Deshpande, AG; Malanotte-Rizzoli, P (Elsevier BV, 2002-06-01) Several different time series of chlorophyll images from the 1997-2000 Seaviewing, Wide Field-of-view Sensor data set have been analysed to gain a perspective on the dynamical and biological variability in the Black Sea, particularly oil its northwestern shelf region and along the Anatolian coastal zone. The images are interpreted in terms of documenting the close link between biological production and physical dynamics of the boundary system, and of emphasizing the role of eddy processes on controlling mes...

Citation Formats

T. Oguz, D. Macias, L. Renault, J. Ruiz, and J. Tintore, “Controls of plankton production by pelagic fish predation and resource availability in the Alboran and Balearic Seas,” PROGRESS IN OCEANOGRAPHY, pp. 1–14, 2013, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/67901.