Planktonic food web structure and dynamic in freshwater marshes after a lock closing in early spring

2014 ◽  
Vol 77 (1) ◽  
pp. 115-128 ◽  
Author(s):  
Hélène Masclaux ◽  
Sébastien Tortajada ◽  
Olivier Philippine ◽  
François-Xavier Robin ◽  
Christine Dupuy
Keyword(s):  
Food Web ◽  
Early Spring ◽  
Food Web Structure ◽  
Freshwater Marshes ◽  
Planktonic Food ◽  
Web Structure

Decrease in diatom dominance at lower Si:N ratios alters plankton food webs

2020 ◽  
Vol 42 (4) ◽  
pp. 411-424
Author(s):  
Kriste Makareviciute-Fichtner ◽  
Birte Matthiessen ◽  
Heike K Lotze ◽  
Ulrich Sommer
Keyword(s):  
Food Web ◽  
Food Webs ◽  
Phytoplankton Community ◽  
Plankton Community ◽  
Trophic Levels ◽  
Food Web Structure ◽  
Planktonic Food ◽  
Web Structure ◽  
Copepod Grazing ◽  
Important Food Source

Abstract Many coastal oceans experience not only increased loads of nutrients but also changes in the stoichiometry of nutrient supply. Excess supply of nitrogen and stable or decreased supply of silicon lower silicon to nitrogen (Si:N) ratios, which may decrease diatom proportion in phytoplankton. To examine how Si:N ratios affect plankton community composition and food web structure, we performed a mesocosm experiment where we manipulated Si:N ratios and copepod abundance in a Baltic Sea plankton community. In high Si:N treatments, diatoms dominated. Some of them were likely spared from grazing unexpectedly resulting in higher diatom biomass under high copepod grazing. With declining Si:N ratios, dinoflagellates became more abundant under low and picoplankton under high copepod grazing. This altered plankton food web structure: under high Si:N ratios, edible diatoms were directly accessible food for copepods, while under low Si:N ratios, microzooplankton and phago-mixotrophs (mixoplankton) were a more important food source for mesograzers. The response of copepods to changes in the phytoplankton community was complex and copepod density-dependent. We suggest that declining Si:N ratios favor microzoo- and mixoplankton leading to increased complexity of planktonic food webs. Consequences on higher trophic levels will, however, likely be moderated by edibility, nutritional value or toxicity of dominant phytoplankton species.

scholarly journals Anthropogenic shift of planktonic food web structure in a coastal lagoon by freshwater flow regulation

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Deevesh A. Hemraj ◽  
A. Hossain ◽  
Qifeng Ye ◽  
Jian G. Qin ◽  
Sophie C. Leterme
Keyword(s):  
Food Web ◽  
Coastal Lagoon ◽  
Flow Regulation ◽  
Food Web Structure ◽  
Freshwater Flow ◽  
Planktonic Food ◽  
Web Structure

Differences in food web structure of mangroves and freshwater marshes: evidence from stable isotope studies in the Southern Gulf of Mexico

2014 ◽  
Vol 23 (2) ◽  
pp. 293-314 ◽  
Author(s):  
Alejandra Sepúlveda-Lozada ◽  
Manuel Mendoza-Carranza ◽  
Matthias Wolff ◽  
Ulrich Saint-Paul ◽  
Alejandro Ponce-Mendoza
Keyword(s):  
Stable Isotope ◽  
Gulf Of Mexico ◽  
Food Web ◽  
Food Web Structure ◽  
Freshwater Marshes ◽  
Web Structure ◽  
Southern Gulf Of Mexico ◽  
Isotope Studies

Planktonic food web structure and potential carbon flow in the Lower River Rhine with a focus on the role of protozoans

2005 ◽  
Vol 21 (5) ◽  
pp. 535-549 ◽  
Author(s):  
Markus Weitere ◽  
Anja Scherwass ◽  
Karl-Theo Sieben ◽  
Hartmut Arndt
Keyword(s):  
Food Web ◽  
Carbon Flow ◽  
River Rhine ◽  
Food Web Structure ◽  
Planktonic Food ◽  
Web Structure ◽  
Potential Carbon

scholarly journals Planktonic food web structure at a coastal time-series site: II. Spatiotemporal variability of microbial trophic activities

2017 ◽  
Vol 121 ◽  
pp. 210-223 ◽  
Author(s):  
Paige E. Connell ◽  
Victoria Campbell ◽  
Alyssa G. Gellene ◽  
Sarah K. Hu ◽  
David A. Caron
Keyword(s):  
Time Series ◽  
Food Web ◽  
Spatiotemporal Variability ◽  
Food Web Structure ◽  
Planktonic Food ◽  
Web Structure

scholarly journals Planktonic food web structure at SSTF and PF in the Indian sector of the Southern Ocean during austral summer 2011

2018 ◽  
Vol 37 (1) ◽  
pp. 1495545 ◽  
Author(s):  
H.U.K. Pillai ◽  
N. Anilkumar ◽  
C.T. Achuthankutty ◽  
C.R. Mendes ◽  
P. Sabu ◽  
...  
Keyword(s):  
Southern Ocean ◽  
Food Web ◽  
Austral Summer ◽  
Food Web Structure ◽  
Planktonic Food ◽  
Web Structure ◽  
Indian Sector

Planktonic Food Web Structure along the Sau Reservoir (Spain) in Summer 1997

2001 ◽  
Vol 86 (2) ◽  
pp. 195-209 ◽  
Author(s):  
Marta Comerma ◽  
Juan Carlos García ◽  
Joan Armengol ◽  
Maria Romero ◽  
Karel Šimek
Keyword(s):  
Food Web ◽  
Food Web Structure ◽  
Planktonic Food ◽  
Web Structure
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