scholarly journals Modelling the biogeographic boundary shift of Calanus finmarchicus reveals drivers of Arctic Atlantification by subarctic zooplankton

2021 ◽  
Author(s):  
Jennifer J. Freer ◽  
Malin Daase ◽  
Geraint A. Tarling
Keyword(s):  
Calanus Finmarchicus ◽  
Boundary Shift

Egg production of Calanus finmarchicus : effect of temperature, food and season

1997 ◽  
Vol 127 (4) ◽  
pp. 609-620 ◽  
Author(s):  
H.-J. Hirche ◽  
U. Meyer ◽  
B. Niehoff
Keyword(s):  
Egg Production ◽  
Calanus Finmarchicus ◽  
Effect Of Temperature

A biophysical model of the interaction between vertical migration of crustacean zooplankton and circulation in the Lower St. Lawrence Estuary

1999 ◽  
Vol 56 (12) ◽  
pp. 2420-2432 ◽  
Author(s):  
Bruno A Zakardjian ◽  
Jeffrey A Runge ◽  
Stephane Plourde ◽  
Yves Gratton
Keyword(s):  
Population Dynamics ◽  
Vertical Migration ◽  
Horizontal Distribution ◽  
Calanus Finmarchicus ◽  
Biophysical Model ◽  
Crustacean Zooplankton ◽  
Simple Formulation ◽  
Lawrence Estuary ◽  
Circulation Patterns ◽  
St Lawrence Estuary

As an essential step in modeling the influence of circulation on the population dynamics of marine planktonic copepods, we define a simple formulation of swimming behavior that can be used in both Eulerian and Lagrangian models. This formulation forces aggregation of the population toward a preferential depth and can be stage specific and time varying, thus allowing description of either diurnal or seasonal vertical migration. We use the formulation to examine the interaction between the circulation and vertical distribution in controlling horizontal distribution of the common planktonic copepod Calanus finmarchicus in the Lower St. Lawrence Estuary, Canada. We first introduce diel migration into a simple one-dimensional model and then into a model of residual two-dimensional circulation patterns representative of conditions encountered in the Lower St. Lawrence Estuary. Results from the latter indicate that interactions between circulation and stage-specific swimming behaviors are the main mechanisms for aggregation of planktonic crustaceans at the head of the Laurentian Channel and highlight the implications of flushing of the surface-dwelling young stages for the population dynamics of C. finmarchicus in the Lower St. Lawrence Estuary.

scholarly journals Permafrost Boundary Shift in Western Siberia May Not Modify Dissolved Nutrient Concentrations in Rivers

Water ◽  
2017 ◽  
Vol 9 (12) ◽  
pp. 985 ◽  
Author(s):  
Sergey Vorobyev ◽  
Oleg Pokrovsky ◽  
Svetlana Serikova ◽  
Rinat Manasypov ◽  
Ivan Krickov ◽  
...  
Keyword(s):  
Western Siberia ◽  
Nutrient Concentrations ◽  
Boundary Shift

scholarly journals Impacts of copepods on marine seston, and resulting effects on Calanus finmarchicus RNA:DNA ratios in mesocosm experiments

2004 ◽  
Vol 146 (3) ◽  
pp. 531-541 ◽  
Author(s):  
C. Becker ◽  
D. Brepohl ◽  
H. Feuchtmayr ◽  
E. Z�llner ◽  
F. Sommer ◽  
...  
Keyword(s):  
Calanus Finmarchicus ◽  
Mesocosm Experiments

scholarly journals Je ll’ai vu: Perception-driven allomorphic optimization of French l’

Probus ◽  
2018 ◽  
Vol 30 (1) ◽  
pp. 47-66
Author(s):  
Joaquim Brandão de Carvalho
Keyword(s):  
Boundary Shift ◽  
Subject Pronoun ◽  
Object Pronouns

AbstractThis article aims to explain the optional gemination in the elided form of the French 3rdp. object pronounsleandla, i.e. before vowel, as in [ʒəllɛvy] forje l’ai vu(e)‘I saw him/her/it’. This geminate, which cannot be accounted for in purely phonological terms, is shown to follow from a boundary shift within the morphological sequence /il+lə/la+V/, providing the 3rdp. object pronouns with a new geminate allomorph before vowel; thereby, /ll/ can spread to the entire paradigm. It is argued (a) that the resulting allomorphy is the strategy found by speakers to eliminate the irregular allomorphy of the 3rdp. subject pronounilbefore consonant; (b) that a perception grammar is needed to capture the reasons for the new allomorphy.

Sign in / Sign up

Export Citation Format

Share Document