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Hace 1 día · Since 2009, more than 7,000 citizens and researchers have collected dragonfly larvae from 150 U.S. national parks as part of the Dragonfly Mercury Project, which is run by the U.S. Geological Survey.
Hace 4 días · Dragonfly larvae possess internal gills located within a chamber at the abdomen’s end, where they actively pump water to ensure a continuous supply of oxygen-saturated water. Conversely, damselfly larvae have three external, leaf-like gills at the abdomen’s end for oxygen absorption.
Hace 3 días · Dragonfly larvae are effective bioindicators of environmental mercury. The widespread presence of their larvae makes dragonflies excellent bioindicators for monitoring environmental health, including mercury contamination.The ability of dragonflies to inhabit a wide variety of freshwater ecosystems allows researchers to gather data from a broader range of locations, providing a more ...
Hace 46 minutos · For the new study, scientists enlisted the help of the public in gathering samples of dragonfly larvae from 150 national parks. The mercury found in larvae bears a chemical signature indicating ...
Hace 4 días · Erythemis simplicicollis, the eastern pondhawk, also known as the common pondhawk, is a dragonfly of the family Libellulidae, native to the eastern two-thirds of the United States and southern Ontario and Quebec, Canada.
Hace 4 días · Mosquito larvae are among the commonest animals in ponds, and they form an important food source for freshwater predators. Among the many aquatic insects that catch mosquito larvae are dragonfly and damselfly nymphs, whirligig beetles, and water striders.
Hace 7 horas · The final stadium larvae of the following four species of south-east Asian Chlorocyphidae are described and compared: Aristocypha fenestrella (Rambur), Heliocypha biseriata (Selys), Libellago hyalina (Selys) and Sundacypha petiolata (Selys), including both sexes for the latter two species. Excepting one L. hyalina specimen from Brunei, identified by supposition based on habitat, all specimens ...
