Related Experiment Video
Updated: May 12, 2026
08:58
Colonization of Euprymna scolopes Squid by Vibrio fischeri
Published on: March 1, 2012
Constrained circulation at Endeavour ridge facilitates colonization by vent larvae.
Richard E Thomson1, Steven F Mihály, Alexander B Rabinovich
1Institute of Ocean Sciences, 9860 West Saanich Road, Sidney, British Columbia, V8L 4B2, Canada. Thomsonr@pac.dfo-mpo.gc.ca
Nature
|August 2, 2003
Summary
Deep-sea larvae colonization is aided by mid-ocean ridge topography. Rift valleys, with reduced currents and plume-driven flow, retain larvae near hydrothermal vents, promoting along-ridge dispersal.
Area of Science:
- Marine biology
- Oceanography
- Geophysics
Background:
- Larval dispersal is crucial for deep-sea ecosystems.
- Hydrothermal vent fields are unique habitats.
- Understanding colonization patterns is key to deep-sea research.
Purpose of the Study:
- To investigate the role of topographically constrained circulation in larval transport along the Endeavour ridge.
- To determine how seafloor topography and currents influence deep-sea larval recruitment.
Main Methods:
- Analysis of current velocity measurements from Endeavour ridge.
- Examination of hydrothermal plume dynamics.
- Modeling of larval transport influenced by topography and currents.
Main Results:
- Tidal and wind-generated currents are attenuated within the mid-ocean ridge rift valley.
- Hydrothermal plumes create a steady near-bottom inflow within the rift valley.
- Suppressed oscillatory currents and plume-driven circulation retain larvae near hydrothermal vent sources.
Conclusions:
- Mid-ocean ridge rift valleys act as barriers to cross-axis dispersal, protecting larvae.
- Plume-driven circulation within active vent fields enhances larval retention.
- Larval export occurs preferentially down-ridge during larger-scale flow events.
Related Concept Videos
02:04Conservation of Small Populations
Small population sizes put a species at extreme risk of extinction due to a lack of variation, and a consequent decrease in adaptability. This weakens the chances of survival under pressures such as climate change, competition from other species, or new diseases. Large populations are more likely to survive pressures such as these, as such populations are more likely to harbor individuals that have genetic variants that are adaptive under new stresses. Small populations are much less likely to...
02:31Habitat Fragmentation
Habitat fragmentation describes the division of a more extensive, continuous habitat into smaller, discontinuous areas. Human activities such as land conversion, as well as slower geological processes leading to changes in the physical environment, are the two leading causes of habitat fragmentation. The fragmentation process typically follows the same steps: perforation, dissection, fragmentation, shrinkage, and attrition.
01:24Regulation of Angiogenesis and Blood Supply
Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits. Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl hydroxylase and factor...
01:20Capillary Beds
Capillary beds are networks of tiny blood vessels that play a crucial role in the circulatory system. These beds are where the exchange of gases, nutrients, and waste products occurs between the blood and surrounding tissues. Each capillary bed consists of numerous capillaries, which are the smallest blood vessels in the body, typically only one cell-thick. This thinness allows for the efficient diffusion of substances.
Capillaries connect arterioles, small branches of arteries, to venules,...
Capillaries connect arterioles, small branches of arteries, to venules,...
01:10Veins as Blood Reservoirs
Veins, while chiefly responsible for circulating blood back to the heart, also function as storage vessels for blood. They house approximately 64 percent of the body's total blood volume, a feat made possible by their high capacitance—the inherent ability to expand and accommodate large volumes of blood, even under low pressure. The large diameter and thin walls of veins augment their distensibility, significantly more so than arteries, due to their classification as capacitance vessels. When...
01:25Colonisation of Pathogens
Pathogen colonization of host tissues is a critical step in the development of infectious diseases. Various pathogenic microorganisms, including bacteria, fungi, viruses, and protozoa, have evolved complex strategies to attach to, invade, and persist within host environments. These mechanisms enable pathogens to establish infections, evade immune responses, and resist antimicrobial treatments.Attachment to Host CellsIn bacteria, colonization typically begins with adherence to host epithelial...