Heterotrophic picoplankton refers to a group of microscopic organisms that are typically less than 2 micrometers in size and are primarily non-photosynthetic. These organisms play a crucial role in the aquatic ecosystem by feeding on organic matter, including bacteria and dissolved organic carbon. Heterotrophic picoplankton includes a variety of microorganisms such as bacteria and archaea that are involved in nutrient cycling and energy flow within marine and freshwater ecosystems.
A harmful algal bloom (HAB) is a rapid increase in the population of certain types of algae in aquatic environments, which can have detrimental effects on aquatic life, human health, and the environment. These blooms are often caused by specific strains of microscopic algae (phytoplankton), which can produce toxins harmful to marine organisms, birds, and mammals, as well as humans.
Gelatinous zooplankton is a term used to describe a diverse group of marine and freshwater organisms that have a gelatinous, often translucent body structure. These organisms are primarily composed of water, which gives them their characteristic jelly-like consistency. Some common examples of gelatinous zooplankton include jellyfish, salps, and certain types of ctenophores (comb jellies).
Fish reproduction refers to the biological processes through which fish produce offspring. There are various methods by which fish reproduce, and these methods can vary significantly among different species. The main modes of fish reproduction include: 1. **Oviparous Reproduction**: Most fish are oviparous, meaning they lay eggs. The eggs are usually fertilized outside the female's body. Fish may spawn in various environments, such as freshwater, saltwater, or on specific substrates like rocks or plants.
In oceanography, the F-ratio is a parameter that compares the rate of new production (the production of organic material from phytoplankton fueled by nutrients from deep waters) to the rate of regenerated production (the production of organic material from phytoplankton that is supported by the recycling of nutrients in the surface layer).
E. Virginia Armbrust is a notable figure in the field of marine science, particularly known for her work in biological oceanography. She has made significant contributions to understanding phytoplankton dynamics and the role of these organisms in ocean ecosystems. Armbrust has been involved in various research initiatives and has published extensively on topics related to ocean health, climate change, and the impact of human activities on marine environments.
Discovery Investigations is typically associated with a range of services that pertain to private investigation, research, and intelligence gathering. However, since "Discovery Investigations" can refer to different entities or services depending on the context, it's important to clarify what specific aspect you are referring to.
Diel vertical migration (DVM) is a behavioral phenomenon observed in many aquatic organisms, particularly zooplankton and some fish, where these organisms migrate vertically in the water column on a daily (diel) cycle. Typically, this behavior involves organisms moving to deeper waters during the day to avoid predation and rising to shallower depths at night to feed. During the daylight hours, many of these species go deeper, where light levels are lower and predators are less active.
Defying Ocean's End is typically associated with project initiatives and organizations focused on marine conservation, sustainability, and the protection of ocean ecosystems. One prominent effort by this name aims to address the critical issues facing oceans, such as overfishing, pollution, and climate change. It often involves collaboration among scientists, policymakers, and local communities to promote sustainable practices and restore marine environments.
Critical depth is a concept in fluid mechanics, particularly in the study of open channel flow. It represents the depth of flow at which the specific energy of the system is at a minimum for a given specific discharge (flow rate per unit width). In simpler terms, for a given amount of water flowing through a channel, critical depth is the depth at which the flow transitions between subcritical and supercritical states.
The Continuous Plankton Recorder (CPR) is a vital tool used in marine biology and oceanography to study plankton populations in the ocean. Originally developed in the 1930s by the Sir Alister Hardy Foundation for Ocean Science (SAHFOS) in the UK, the CPR is designed to collect plankton samples while deployed on ships that traverse the oceans. The CPR consists of a large, box-like instrument that flows through the water as it is towed behind a ship.
The continental shelf pump is a physical oceanographic mechanism that describes how water is transported from the continental shelf to the open ocean. This process primarily occurs due to the interplay of wind forces, water density differences, and the topography of the seabed. Here’s how it works: 1. **Wind Stress**: Winds blowing across the surface of the ocean can create surface currents.
The Center for Microbial Oceanography: Research and Education (C-MORE) is a research and educational initiative that focuses on the study of microbial life in the ocean and its impact on marine ecosystems and global biogeochemical cycles. Established with the aim of advancing our understanding of the role that microbes play in oceanic processes, C-MORE conducts interdisciplinary research that combines microbiology, oceanography, and environmental science.
Brown algae, belonging to the phylum Phaeophyta, are a diverse group of photosynthetic organisms primarily found in marine environments, particularly in colder waters. They are characterized by their brown or olive-green color, which is due to the presence of the pigment fucoxanthin, along with chlorophyll a and c. Brown algae vary in size, ranging from small filaments to large kelps that can grow to several meters in length.
Blue carbon refers to the carbon captured and stored by coastal and marine ecosystems, particularly in salt marshes, mangroves, and seagrasses. These ecosystems play a crucial role in mitigating climate change by sequestering carbon dioxide from the atmosphere and storing it in biomass and sediment. Key aspects of blue carbon include: 1. **Carbon Sequestration**: Coastal ecosystems are highly efficient at capturing carbon.
The biological pump refers to a key process in the ocean's carbon cycle that helps regulate atmospheric carbon dioxide levels and thus plays a critical role in mitigating climate change. It involves the transfer of carbon from the surface ocean to the deep ocean through biological processes. Here's how it works: 1. **Primary Production**: Phytoplankton, microscopic plants in the ocean, utilize sunlight and nutrients to photosynthesize, converting carbon dioxide (CO2) from the atmosphere into organic matter.
Bacterioplankton counting methods refer to various techniques used to estimate the abundance and biomass of bacterioplankton—microscopic bacteria that drift in aquatic environments, both freshwater and marine. Bacterioplankton play critical roles in nutrient cycling, organic matter decomposition, and as a food source for higher trophic levels in aquatic ecosystems. Accurate counting and characterization of these microorganisms are crucial for understanding their ecological roles.
Bacterioplankton refers to the community of bacteria that exist in the water column of aquatic ecosystems, including oceans, lakes, and rivers. These microorganisms are an essential component of the planktonic ecosystem and play critical roles in nutrient cycling, organic matter decomposition, and the overall functioning of aquatic food webs. Bacterioplankton are typically small, ranging from a few micrometers to tens of micrometers in size, and they can be free-living or form aggregates.
The Atlantic Meridional Transect (AMT) is a scientific research initiative aimed at studying the biological, chemical, and physical processes in the Atlantic Ocean. It involves a series of oceanographic expeditions that traverse the Atlantic Ocean from the northern to the southern hemisphere, providing essential data on marine ecosystems, climate variability, and ocean health.
Artificial seawater is a synthetic mixture designed to mimic the chemical composition and properties of natural seawater. It is typically created by dissolving various salts in purified water, enabling researchers, aquarists, and marine scientists to replicate ocean conditions in controlled environments. The primary components of artificial seawater generally include: 1. **Sodium Chloride (NaCl)**: The major component, providing salinity.