Ostracod

An ostracod is a small crustacean belonging to the class Ostracoda. Often called seed shrimp, they are typically found in freshwater and marine environments. Ostracods are characterized by their bivalved carapace, which encloses the body and appendages. Their size usually ranges from 0.2 to 30 millimeters. They are ecologically important, serving as both prey and predators in aquatic ecosystems. Their fossil record extends back to the Ordovician period, making them valuable indicators of past environments and climate change. They possess various feeding strategies, including filter feeding, scavenging, and predation. Their unique reproductive strategies encompass sexual and parthenogenetic reproduction. Ostracods' morphology, ecological roles, and fossil record make them intriguing subjects of study.

Ostracod meaning with examples

• The researcher carefully examined the sediment sample under the microscope, identifying various species of ostracods and other micro-organisms. Ostracods were prevalent in this sample and are common inhabitants of the lake's floor. This data would provide insight into the water's health. Different ostracod shell shapes could indicate changing environmental conditions over time.
• A paleontology student studied the ostracods found in ancient rock formations, uncovering insights into the evolution of early aquatic life. The ostracods present were very well-preserved. They helped establish the age of the rock strata, which contained these fossils, and provided clues about the climate conditions of the time. These fossils proved invaluable.
• Scientists monitored the ostracod population in a polluted river system to assess the impact of contaminants on aquatic life. The number of ostracods declined as pollution increased, indicating that they are sensitive to the presence of toxins in the water. Ostracods were indicators, not just in old rocks, but now modern ones.
• Ecologists used ostracods to monitor the health of a restored wetland, noting the presence of specific species as a sign of ecological recovery. The ostracods in the sample flourished with the wetland improvement. The different ostracods helped them to evaluate the success of their restoration efforts, based on the diversity found.
• The aquarist observed the ostracods in their freshwater aquarium, noting their feeding behavior and contribution to the ecosystem within the tank. They feed on small algae and organic matter, so this was a good sign. They also helped to maintain the water quality, by removing decaying organic matter. They provided food for the aquarium as a whole.