Predator community composition can alter habitat quality for prey by changing the strength and direction of consumptive effects. Whether predator community composition also alters prey density via nonconsumptive effects during habitat selection is not well known, but is important for understanding how changes to predator communities will alter prey populations. We tested the hypothesis that pre...

This study examined the role of the anal papillae of the freshwater (FW) chironomid larva Chironomus riparius in ionoregulation under ion-poor conditions. The scanning ion-selective electrode technique (SIET) was utilized to characterize the species, direction, and rates of inorganic ion transport by the anal papillae following acute and long-term exposure to ion-poor water (IPW). The major ino...

A survey of larval midge remains from surficial sediments in 37 New England lakes was undertaken in order to relate midge distributions to environmental factors. The lakes are located along a transect from northern New Hampshire to southern Connecticut. The midges proved to be a very diverse group of insects in these freshwater habitats. A total of 65 chironomid taxa were recovered. Canonical c...

Cholera is a severe diarrheal disease caused by specific serogroups of Vibrio cholerae that are pathogenic to humans. The disease does not persist in a chronic state in humans or animals. The pathogen is naturally present as a free-living organism in the environment. Recently, it was suggested that egg masses of the nonbiting midge Chironomus sp. (Diptera) harbor and serve as a nutritive source...

Chironomids, diatoms and microcrustaceans that inhabit aquatic ecosystems of the Northern Neotropics are abundant and diverse. Some species are highly sensitive to changes in water chemical composition and trophic state. This study was undertaken as a first step in developing transfer functions to infer past environmental conditions in the Northern lowland Neotropics. Bioindicator species abund...

Inflow of matter and organisms may strongly affect the local density and diversity of organisms. This effect is particularly evident on shores where organisms with aquatic larval stages enter the terrestrial food web. The identities of such trophic links are not easily estimated as spiders, a dominant group of shoreline predator, have external digestion. We compared trophic links and the prey d...

Although there have been numerous studies on microcystin (MC) accumulation in aquatic organisms recently, the bioaccumulation of MCs in relatively small sized organisms, as well as potential influencing factors, has been rarely studied. Thus, in this study, we investigated the bioaccumulation of three MC congeners (-LR, -RR and -YR) in the chironomid larvae of Tanypus chinensis (an excellent fo...

Bottom-living oligochaetes and chironomid larvae, thanks to their supposedly integrative power, could provide more robust measures of the water quality lakes than separate chemical data. The oligochaete fauna large southern Scandinavia has been studied in detail over many years—often 100 years or (Milbrink, 2020). Characteristic species associations ecological preferences each are thus relative...

In North America, disturbed riparian zones have had a deleterious effect on the life cycles of anadromous fish, especially commercially and culturally important salmon steelhead. The result has been significant reduction in numbers average size these fish. Tributaries John Day River are spawning waters for western populations National Forest Service Confederated Tribes Umatilla Indian Reservati...