Scales of disturbance and their role in plankton ecology

Hydrobiologia ◽  
1993 ◽  
Vol 249 (1-3) ◽  
pp. 157-171 ◽  
Author(s):  
Colin S. Reynolds
Keyword(s):  
Plankton Ecology

scholarly journals Resolving ecological feedbacks on the ocean carbon sink in Earth system models

2020 ◽  
Author(s):  
David I. Armstrong McKay ◽  
Sarah E. Cornell ◽  
Katherine Richardson ◽  
Johan Rockström
Keyword(s):  
Climate Change ◽  
Carbon Sink ◽  
Biological Pump ◽  
Earth System ◽  
Temperature Dependent ◽  
System Models ◽  
Plankton Ecology ◽  
Ocean Carbon ◽  
The Impact ◽  
Earth System Models

Abstract. The Earth’s oceans are one of the largest sinks in the Earth system for anthropogenic CO2 emissions, acting as a negative feedback on climate change. Earth system models predict, though, that climate change will lead to a weakening ocean carbon uptake rate as warm water holds less dissolved CO2 and biological productivity declines. However, most Earth system models do not incorporate the impact of warming on bacterial remineralisation and rely on simplified representations of plankton ecology that do not resolve the potential impact of climate change on ecosystem structure or elemental stoichiometry. Here we use a recently-developed extension of the cGEnIE Earth system model (ecoGEnIE) featuring a trait-based scheme for plankton ecology (ECOGEM), and also incorporate cGEnIE's temperature-dependent remineralisation (TDR) scheme. This enables evaluation of the impact of both ecological dynamics and temperature-dependent remineralisation on the soft-tissue biological pump in response to climate change. We find that including TDR strengthens the biological pump relative to default runs due to increased nutrient recycling, while ECOGEM weakens the biological pump by enabling a shift to smaller plankton classes. However, interactions with concurrent ocean acidification cause opposite sign responses for the carbon sink in both cases: TDR leads to a smaller sink relative to default runs whereas ECOGEM leads to a larger sink. Combining TDR and ECOGEM results in a net strengthening of the biological pump and a small net reduction in carbon sink relative to default. These results clearly illustrate the substantial degree to which ecological dynamics and biodiversity modulate the strength of climate-biosphere feedbacks, and demonstrate that Earth system models need to incorporate more ecological complexity in order to resolve carbon sink weakening.

Application of stochastic geometry to problems in plankton ecology

1992 ◽  
Vol 336 (1277) ◽  
pp. 225-237 ◽  
Keyword(s):  
Optical Sensors ◽  
Stochastic Geometry ◽  
Point Processes ◽  
Random Distribution ◽  
Interparticle Distance ◽  
Ecosystem Dynamics ◽  
Order Moment ◽  
Patch Structure ◽  
Covariance Functions ◽  
Plankton Ecology

The most fundamental linkages in ecosystem dynamics are trophodynamic. A trophodynamic theory requires a framework based upon inter-organism or interparticle distance, a metric important in its own right, and an essential component relating trophodynamics and the kinetic environment. It is typically assumed that interparticle distances are drawn from a random distribution, even though particles are known to be distributed in patches. Both random and patch-structure interparticle distance are analysed using the theory of stochastic geometry. Aspects of stochastic geometry - point processes and random closed sets (RCS) - useful for studying plankton ecology are presented. For point-process theory, the interparticle distances, random -distribution order statistics, transitions from random to patch structures, and second-order-moment functions are described. For RCS-theory, the volume fractions, contact distributions, and covariance functions are given. Applications of stochastic-geometry theory relate to nutrient flux among organisms, grazing, and coupling between turbulent flow and biological processes. The theory shows that particles are statistically closer than implied by the literature, substantially resolving the troublesome issues of autotroph-heterotroph nutrient exchange; that the microzone notion can be extended by RCS; that patch structure can substantially modify predator-prey encounter rates, even though the number of prey is fixed; and that interparticle distances and the RCS covariance function provide a fundamental coupling with physical processes. In addition to contributing to the understanding of plankton ecology, stochastic geometry is a potentially useful for improving the design of acoustic and optical sensors

Global Change and Plankton Ecology in the Southwestern Atlantic

2018 ◽  
pp. 565-574
Author(s):  
Elena S. Barbieri ◽  
María A. Marcoval ◽  
Rodrigo D. Hernández-Moresino ◽  
Mariela L. Spinelli ◽  
Rodrigo J. Gonçalves
Keyword(s):  
Global Change ◽  
Southwestern Atlantic ◽  
Plankton Ecology

A STUDY OF PLANKTON ECOLOGY IN CHESTERFIELD INLET, NORTHWEST TERRITORIES: AN ARCTIC ESTUARY

1980 ◽  
pp. 185-197 ◽  
Author(s):  
John C. Roff ◽  
Robert J. Pett ◽  
Greg F. Rogers ◽  
W. Paul Budgell
Keyword(s):  
Northwest Territories ◽  
Plankton Ecology

scholarly journals PFR2: a curated database of planktonic foraminifera 18S ribosomal DNA as a resource for studies of plankton ecology, biogeography and evolution

2015 ◽  
Vol 15 (6) ◽  
pp. 1472-1485 ◽  
Author(s):  
Raphaël Morard ◽  
Kate F. Darling ◽  
Frédéric Mahé ◽  
Stéphane Audic ◽  
Yurika Ujiié ◽  
...  
Keyword(s):  
Ribosomal Dna ◽  
Planktonic Foraminifera ◽  
Plankton Ecology

Plankton Ecology and Biodiversity in the Bahía Blanca Estuary

2021 ◽  
pp. 83-111
Author(s):  
Anabela A. Berasategui ◽  
M. Sofía Dutto ◽  
Celeste López-Abbate ◽  
Valeria A. Guinder
Keyword(s):  
Bahía Blanca Estuary ◽  
Plankton Ecology ◽  
Blanca Estuary

Nutrient and Plankton Ecology of the Columbia River Estuary

Ecology ◽  
1969 ◽  
Vol 50 (6) ◽  
pp. 962-978 ◽  
Author(s):  
Lois Haertel ◽  
Charles Osterberg ◽  
Herbert Curl ◽  
P. Kilho Park
Keyword(s):  
River Estuary ◽  
Columbia River ◽  
Columbia River Estuary ◽  
Plankton Ecology
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