Zooplankton - Related Links
Open Access Articles- Top Results for Zooplankton
Journal of Earth Science & Climatic ChangeZooplankton Abundance and Diversity from Pointcalimere to Manamelkudi, South East Coast of India
Journal of Ecosystem & EcographyDistribution and Abundance of Zooplankton Along Tamil Nadu Coastal Waters, India
Journal of Coastal Zone ManagementThe Role of Zooplankton Predator, Chaetognaths (Sagitta spp) in Baguala Bay Waters, Ambon Island
Biology and MedicineZooplankton population in relation to physico-chemical factors of a sewage fed pond of Aligarh (UP), India
Fisheries and Aquaculture JournalInfluence of Seasons on Water Quality, Abundance of Fish and Plankton Species of Ikwori Lake, South-Eastern Nigeria
Zooplankton // are heterotrophic (sometimes detritivorous) plankton. Plankton are organisms drifting in oceans, seas, and bodies of fresh water. The word "zooplankton" is derived from the Greek zoon (ζῴον), meaning "animal", and planktos (πλαγκτός), meaning "wanderer" or "drifter". Individual zooplankton are usually microscopic, but some (such as jellyfish) are larger and visible with the naked eye.
Zooplankton is a categorization spanning a range of organism sizes including small protozoans and large metazoans. It includes holoplanktonic organisms whose complete life cycle lies within the plankton, as well as meroplanktonic organisms that spend part of their lives in the plankton before graduating to either the nekton or a sessile, benthic existence. Although zooplankton are primarily transported by ambient water currents, many have locomotion, used to avoid predators (as in diel vertical migration) or to increase prey encounter rate.
Ecologically important protozoan zooplankton groups include the foraminiferans, radiolarians and dinoflagellates (the latter are often mixotrophic). Important metazoan zooplankton include cnidarians such as jellyfish and the Portuguese Man o' War; crustaceans such as copepods and krill; chaetognaths (arrow worms); molluscs such as pteropods; and chordates such as salps and juvenile fish. This wide phylogenetic range includes a similarly wide range in feeding behavior: filter feeding, predation and symbiosis with autotrophic phytoplankton as seen in corals. Zooplankton feed on bacterioplankton, phytoplankton, other zooplankton (sometimes cannibalistically), detritus (or marine snow) and even nektonic organisms. As a result, zooplankton are primarily found in surface waters where food resources (phytoplankton or other zooplankton) are abundant.
Just as any species can be limited within a geographical region, so is zooplankton. However, species of zooplankton are not dispersed uniformly or randomly within a region of the ocean. Instead ‘patches’ of zooplankton species (this also applies to phytoplankton) exist throughout the ocean. Though few physical barriers exist above the mesopelagic, specific species of zooplankton are strictly restricted by salinity and temperature gradients; while other species can withstand wide temperature and salinity gradients. Zooplankton patchiness can also be influenced by biological factors, as well as other physical factors. Biological factors include breeding, predation, concentration of phytoplankton, and vertical migration. The physical factor that influences zooplankton distribution the most is mixing of the water column (upwelling and downwelling along the coast and in the open ocean) that affects nutrient availability and, in turn, phytoplankton production.
Through their consumption and processing of phytoplankton and other food sources, zooplankton play a role in aquatic food webs, as a resource for consumers on higher trophic levels (including fish), and as a conduit for packaging the organic material in the biological pump. Since they are typically small, zooplankton can respond rapidly to increases in phytoplankton abundance,[clarification needed] for instance, during the spring bloom.
Zooplankton can also act as a disease reservoir. Crustacean zooplankton have been found to house the bacterium Vibrio cholerae, which causes cholera, by allowing the cholera vibrios to attach to their chitinous exoskeletons. This symbiotic relationship enhances the bacterium's ability to survive in an aquatic environment, as the exoskeleton provides the bacterium with carbon and nitrogen.
|Segmented worm||Tiny shrimp-like crustaceans||Juvenile planktonic squid|
|Fish egg 1mm||Ocean sunfish larvae 2.7mm||Larvae of a conger eel 7.6 cm|
- Biological pump
- Census of Marine Zooplankton
- Diel vertical migration
- Gelatinous zooplankton
- Ocean acidification
- Primary production
- Thurman, H. V. (1997). Introductory Oceanography. New Jersey, USA: Prentice Hall College. ISBN 0-13-262072-3.
- Lalli, C.M. and Parsons, T.R. (1993). Biological Oceanography An Introduction. 30 Corporate Drive, Burlington, MA 01803: Elsevier. p. 314. ISBN 0-7506-3384-0.
- Jude, B.A., Kirn, T.J., Taylor R.K. (2005). "A colonization factor links Vibrio cholerae environmental survival and human infection". Nature 438 (7069): 863–6. PMID 16341015. doi:10.1038/nature04249.
- Ocean Drifters Short film narrated by David Attenborough about the varied roles of plankton
- Sea Drifters BBC Audio slideshow
- Plankton Chronicles Short documentary films & photos
- COPEPOD: The global plankton database. A global coverage database of zooplankton biomass and abundance data.
- Plankton*Net @ Roscoff, images of planktonic species
- Guide to the marine zooplankton of south eastern Australia, Tasmanian Aquaculture and Fisheries Institute
- Australian Continuous Plankton Recorder Project