Related Experiment Video
Updated: Dec 16, 2025
10:46
A Method of Trigonometric Modelling of Seasonal Variation Demonstrated with Multiple Sclerosis Relapse Data
Published on: December 9, 2015
10.9K
Seasons of Syn
Kristen R Hunter-Cevera1,2, Michael G Neubert2, Robert J Olson2
1Josephine Bay Paul Center Marine Biological Laboratory Woods Hole Massachusetts.
Limnology and Oceanography
|July 3, 2020
Summary
Seasonal factors control the abundance of marine Synechococcus (a key primary producer). Temperature limits growth in winter/spring, while light limits it in fall, impacting population dynamics.
Area of Science:
- Marine microbial ecology
- Phytoplankton dynamics
- Oceanographic time-series analysis
Background:
- Synechococcus is a crucial marine primary producer globally.
- Understanding seasonal abundance patterns is vital for marine ecosystem studies.
- Time-series data offer critical insights into factors influencing phytoplankton populations.
Purpose of the Study:
- To analyze a 16-year hourly time series of Synechococcus abundance.
- To investigate the seasonal drivers of Synechococcus cell division and loss rates.
- To examine relationships between Synechococcus ecophysiology and environmental variables.
Main Methods:
- Utilized an automated, in situ flow cytometer for data collection.
- Analyzed a 16-year hourly time series dataset from Martha's Vineyard Coastal Observatory.
- Correlated Synechococcus cell division and loss rates with environmental factors like temperature and light.
Main Results:
- Identified distinct seasonal patterns in Synechococcus cell division drivers.
- Found temperature limitation during winter and spring, and light limitation in the fall.
- Observed seasonal variations in population loss rates, influencing overall abundance.
Conclusions:
- Developed a framework for understanding seasonal controls on Synechococcus abundance in coastal systems.
- Generated testable hypotheses regarding Synechococcus ecophysiology.
- Highlighted the importance of integrated environmental and biological data for marine microbial ecology.
Related Concept Videos
02:47The Synapse
131.9K
Neurons communicate with one another by passing on their electrical signals to other neurons. A synapse is the location where two neurons meet to exchange signals. At the synapse, the neuron that sends the signal is called the presynaptic cell, while the neuron that receives the message is called the postsynaptic cell. Note that most neurons can be both presynaptic and postsynaptic, as they both transmit and receive information.
131.9K
01:15The Antenna Complex
7.4K
Plants and other photosynthetic organisms comprise pigments capable of absorption of direct sunlight. These pigments are present in the reaction center - the main site of photochemical reactions as well as in the antenna complex. Under average light conditions, the rate at which reaction center pigments absorb light is far below the electron transport chain's capacity. As a result, the reaction center alone cannot provide enough energy to drive photosynthesis. The photosynthetic efficiency can...
7.4K
01:17Series Resonance
559
The RLC circuit impedance is defined as the ratio of the supply voltage to the circuit current. Resonance in such a circuit occurs when the imaginary part of this impedance equals zero. This specific condition means that the inductive reactance is exactly equal to the capacitive reactance. The frequency at which this happens is known as the resonant frequency. Mathematically, the resonant frequency is inversely proportional to the square root of the product of the inductance (L) and capacitance...
559
02:45Biological Clocks and Seasonal Responses
41.3K
The circadian—or biological—clock is an intrinsic, timekeeping, molecular mechanism that allows plants to coordinate physiological activities over 24-hour cycles called circadian rhythms. Photoperiodism is a collective term for the biological responses of plants to variations in the relative lengths of dark and light periods. The period of light-exposure is called the photoperiod.
41.3K
01:46The Calvin Benson Cycle
5.6K
Ribulose 1,5- bisphosphate carboxylase/oxygenase (RuBisCo) is a critical enzyme that catalyzes carbon dioxide assimilation during photosynthesis. However, it is an inefficient enzyme, having an extremely slow catalytic rate. A typical enzyme can process about a thousand molecules per second; however, RuBisCo fixes only around three-carbon dioxides per second. Photosynthetic cells compensate for this slow rate by synthesizing very high amounts of RuBisCo, making it the most abundant single...
5.6K
01:27Synesthesia
384
Synesthesia is a remarkable condition where stimulation of one sensory or cognitive pathway leads to automatic, involuntary experiences in a second sensory or cognitive pathway. People with synesthesia experience a blending or crossing of their senses, such as sight and sound, leading to cross-modal sensations. In this condition, the stimulation of one sense, such as hearing a number or musical note, triggers an experience of another sense, like sensing a specific color, taste, or smell. People...
384