In assessing the distributions of trace metals in aquatic environments as a prerequisite to any study of the variation of local toxic metal contamination over space and time, it is tempting to measure dissolved and/or sediment concentrations. A third and preferred alternative, however, is the measurement of accumulated trace metal concentrations in selected organisms, termed biomonitors. Such c...

Three-dimensional range shifts in biodiversity driven by recent global warming 1 2 Peter Haase, Fengqing Li, Andrea Sundermann, Armin W. Lorenz, Jonathan D. Tonkin, Stefan Stoll 3 4 Department of River Ecology and Conservation, Senckenberg Research Institute and Natural History Museum 5 Frankfurt, Gelnhausen, Germany 6 Department of River and Floodplain Ecology, Faculty of Biology, University o...

Aquatic microcosm studies often increase either chamber height or base diameter (to increase water volume) to test spatial ecology theories such as "scale" effects on ecological processes, but it is unclear whether the increase of chamber height or base diameter have the same effect on the processes, i.e., whether the effect of the shape of three-dimensional spaces is significant. We orthogonal...

Understanding of the effects of wildland fire and fire management on aquatic and riparian ecosystems is an evolving field, with many questions still to be resolved. Limitations of current knowledge, and the certainty that fire management will continue, underscore the need to summarize available information. Integrating fire and fuels management with aquatic ecosystem conservation begins with re...

John C. Holz is an Assistant Professor at the University of Nebraska-Lincoln, where he received his M.S. and Ph.D. degrees in aquatic ecology. He has established an active lake water quality extension program that provides information on common Midwest management issues (e.g., algal control, aquatic weed management, nutrient management) to lake owners, users, and managers. His research interest...

Eutrophication is one of the most important problems in the ecology of fresh waters. The aim of the present work was to investigate the effect of eutrophic overload (nitrates and phosphates) to the structure of zoobenthos in two types of experimental waters. Experimental mesocosms containing ground and water were used to investigate nitrate-phosphorus effect to hydrobionts. The negative effects...

There are approximately one hundred thousand aquatic insect species currently known to science and this figure is likely a significant underestimation. The ecology of aquatic insect groups has been studied due to their role as bioindicators of water quality and in the case of Diptera, their role as vectors of disease. Light trapping targets emergent adults, using mercury vapour bulbs or actinic...