Filters: Tags: aquatic insects (X)635 results (151ms)
Assessing the influence of water and substratum quality on benthic macroinvertebrate communities in a metal-polluted stream: an experimental approach
1. Field and laboratory experiments were conducted to assess the relative influence of water quality and substratum quality on benthic macroinvertebrate communities in the Animas River, a metal-polluted stream in south-western Colorado (U.S.A.). 2. A community-level in situ toxicity test measured direct effects of Animas River water on benthic invertebrates collected from a reference stream (Elk Creek). The effects of metal-contaminated biofilm were examined by comparing macroinvertebrate colonisation of clean and contaminated substrata placed in Elk Creek. A feeding experiment with the mayfly Baetis tricaudatus Dodds (Ephemeroptera: Baetidae) examined metal bioaccumulation and effects of metal-contaminated biofilm...
Southern Utah comprises 4 major physiographic divisions: the Great Basin, Colorado Plateau, Central Rocky Mountains, and Southern Rocky Mountains, which have been partitioned into faunal regions. We discuss the uniqueness of southern Utah and the amount of land set aside for recreation and preservation, and we encourage the study and preservation of its water resources. The stonefly (Plecoptera) fauna of 13 counties in southern Utah was surveyed. We found 58 species representing 34 genera and 8 families. Three new state records for Utah and many new county records for southern Utah are presented, along with a discussion of distribution patterns and faunal affinities of each species. Distribution patterns indicate...
Effect of feeding by a North American weevil, Euhrychiopsis lecontei , on Eurasian watermilfoil (Myriophyllum spicatum ).
Bionomics of Culex tarsalis (Diptera: Culicidae) in relation to arbovirus transmission in southeastern California
Environmental factors affecting the taxonomic composition of aquatic macroinvertebrate communities in lowland waterways of Northland, New Zealand
Population dynamics and species diversity of odonate larvae in a fish farming wetland of Santhal Pargana (Bihar), India
Anopheline (Diptera: Culicidae) breeding in a traditional tank-based village ecosystem in north central Sri Lanka
Influence of ultraviolet radiation on the colonization dynamics of a Rocky Mountain stream benthic community
Effects of urbanization on brown trout Salmo trutta, other fishes and macroinvertebrates in Valley Creek, Valley Forge, Pennsylvania
Management procedures required to increase chironomid availability to waders feeding on artificial lagoons remain unclear
Substrate preferences and activity patterns of two Leptophlebiidae (Ephemeroptera) species from southern Chile
Introduction and establishment of Aedes (Stegomyia) albopictus Skuse (Diptera: Culicidae) in Albania