Abstract Land-use practices in Mongolia can lead to environmental degradation and consequently affect the structure function of biological communities. The main aim this study was determine land-use effects on freshwater macroinvertebrate communities based their response grazing mining, using a trait-based approach (TBA). functional examined 86 categories 16 traits. A total 13 physical chemical variables were significantly different among levels intensity. Significant declines diversity...

A biological assessment was done to determine the impact of heavy metal discharge from Schuykill Metals Recycling Plant (SMCP) on Cannon Creek, Missouri, its receiving stream. The relationship between sediment chemistry and chironomid emergence examined. Twenty-four metals nutrients SMCP effluent were examined in Creek above effluent, at below effluent. Five (barium, cadmium, lead, manganese, zinc) sodium varied significantly sites. Changes community composition, mean abundance emerging...

Native species in lakes commonly are affected by cultural eutrophication and introductions of nonnative species. The effects these disturbances on benthic communities large have been understudied, despite the integral role that benthos play maintaining habitat complexity ecosystem processes. Lake Tahoe has experienced progressive over past several decades, but how its unique is unclear. density Tahoe's fauna was compared between 1960s surveys our recent (2008–2009) survey, association...

The importance of education in science, technology, engineering, and mathematics (STEM) disciplines is again a topic discussion among policy makers scientists, particularly given perceived declines STEM performance by students the U.S. Service-learning has been used innovative creative ways to enhance learning variety STEM-related courses. Improving literacy also focal point explicitly linked servicelearning projects. Herein authors review literature linking service-learning academic...

Abstract We analyze here the nature of research in freshwater macrosystem biology (especially lotic studies) from both conceptual and current perspectives. The boundaries permanent transitional macrosystems smallest to largest spatial extents are described. contrast ecosystem vs. macroecology ecology provide some examples representative aquatic projects USA. recommend approaches for incorporating certain large‐scale concepts developed over last 40 yr as bases studies. Of these, three most...

Overgrazing along stream channels in Mongolia may impact streams by increasing channel erosion and in-stream sediments, water temperature, pH, conductivity. Grazing impacts impair insects. The Mongolian Aquatic Insect Survey sampled 250 during summer seasons 2003-2006 2008. On-site identifi cations of aquatic insect families mostly based on collections adults were recorded for each site, leading us to ask whether the family-level data useful biological assessment related impairment from...

Relative to their scarcity, large, deep lakes support a large proportion of the world's freshwater species. This biodiversity is threatened by human development and in need conservation. Direct comparison basis biological monitoring for conservation but difficult conduct between insular ecosystems. The objective our study was such benthic three largest lakes: Lake Tahoe, USA; Hövsgöl, Mongolia; Crater Lake, USA. We examined common organism, non-biting midges (Chironomidae) determined lake...

Fourteen species of Chironomidae (Diptera) are recorded for the first time from Hovsgol Nuur region, Mongolia, increasing total number chironomid this country to 166 (Table 1). Two major studies have contributed most data on distribution in Mongolia. The study, summarized by Kozhova et al. (1994) and Erbaeva Safronov (in press), was based 20 years research Nuur, an ancient lake Northern second Sasa Suzuki (1997), described many new listed Central Southwestern In addition, Reiss (1971)...

We assessed the potential influence of hydrological connectivity among subdrainages on structural and functional organization stream macroinvertebrate metacommunities in 2 adjacent, large Asian watersheds (~1.4 million km2). To examine metacommunities, we used multisite β-diversity partitioning applied Elements Metacommunity Structure (EMS) framework to resolve aspects taxon associations metacommunity assembly. also decomposed β diversity into nestedness turnover assess contrasting...

Surveys for symbiotic fungi in the guts of aquatic insect larvae (Trichomycetes: Harpellales) Tasmania, Australia, resulted discovery four new species: two Gripopterygidae (Plecoptera) nymphs, Plecopteromyces leptoperlarum and P. trinotoperlarum, associated with Diptera larvae, Smittium magnosporum Thaumaleidae Stachylina dolichospora Chironomidae. Previously described species Harpellales from other localities are reported host records summarized. A key to all Tasmanian is provided.

Taxonomic composition and emergence phenologies of Chironomidae inhabiting an intermittent stream in eastern Kansas were determined over a three year period using collections surface-floating pupal exuviae. Duration surface flows varied substantially the study, ranging from 266 days 1993-1994 to 215 1994-1995 137 1995-1996. The bed dried completely during summer and/or fall all years. Fifty-five species emerged with Orthocladiinae having greatest richness (26 taxa), followed by Chironomini...

The Mongolian Aquatic Insect Survey (MAIS) has systematically surveyed a diverse range of aquatic habitats in Mongolia during the summers 2003–2006 and 2008–2010. Nymphomyiidae were collected from three sites northern Altai region 2008 2010. Collection this rare family Diptera prompted search through specimen data generated by MAIS project other ecology projects resulting database 375 which had specimens identified to family. No additional nymphomyiid found, indicating that these flies are...

Rapidly declining diversity of freshwater species necessitates surveys to document and describe patterns in biodiversity. To this end, a survey Chironomidae (Insecta: Diptera) was conducted remote watershed western Alaska. Larval chironomids were collected from 16 stream sites the Kuskokwim River 2009 2010. Twenty-seven chironomid taxa identified. Orthocladiinae most diverse subfamily numerically dominant at all except glacial runoff where Diamesinae dominant. Two rare study: an undescribed...

Paraboreochlus minutissimus (Strobl 1894) and Trichotanypus posticalis (Lundbeck 1898) have been collected from Gorkhi Terelj, Outer Mongolia resulting in the first record for these species subfamily Podonominae (Diptera: Chironomidae) this country. Both were habitats similar to their described Europe North America. A review of biogeography indicates that are restricted more northern part Holarctic region will likely be Mongolia; whereas Paraboroechlus has a southern distribution future...

Overgrazing is one of the major land-use impacts in Mongolia leading to habitat degradation and subsequent impairment biological diversity. This study examined macroinvertebrate diversity among sites with different grazing intensities Hövsgöl, Mongolia, test whether taxonomic functional structure community differs streams intensity. The 14 551 total identified specimens comprised 78 genera 27 families from 6 streams. Exponential Shannon index weighted were significantly higher low than...

The two genera of Harpellales (Trichomycetes) found most frequently in Chironomidae (midge) larvae, namely Smittium the hindgut and Stachylina midgut, are easily distinguished instances. However, cases reported which trichospores extrude prematurely as they pass through with sporangiospore attaching to peritrophic membrane thereby leading very limited thallic growth that resembles an immature thallus. This development appears be common longisporum Sm. perforatum, may occur less some other...

Surveys for symbiotic fungi in the guts of aquatic insect larvae (Trichomycetes: Harpellales) Tasmania, Australia, resulted discovery four new species: two Gripopterygidae (Plecoptera) nymphs, Plecopteromyces leptoperlarum and P. trinotoperlarum, associated with Diptera larvae, Smittium magnosporum Thaumaleidae Stachylina dolichospora Chironomidae. Previously described species Harpellales from other localities are reported host records summarized. A key to all Tasmanian is provided.

Seven bays and four streams were sampled for surface floating pupal exuviae of Chironomidae (Insecta: Diptera) from the Lake Hovsgol watershed, Mongolia in July 1997. A total 52 taxa identified with 12 species being new records 1 a record Region. Communities emerging chironomidae compared between lake bay affluent stream environments to determine whether chironomids recruited ultra-oligotrophic bays. Hierarchical cluster analyses used classify sites this comparison. Bays classified together...

Typical of large, oligotrophic lakes, Lake H<TEX>$\ddot{o}$</TEX>vsg<TEX>$\ddot{o}$</TEX>l, Mongolia, exhibits complex morphometry which should support a spatially heterogeneous community benthic macroinvertrates. The lake also broad range land uses. Based on the variation in use and physical habitat (e.g. substrate presence affluent streams bays), we asked two questions. First, does density total macroinvertebrates vary between different bays H<TEX>$\ddot{o}$</TEX>vsg<TEX>$\ddot{o}$</TEX>l?...