Results 61 to 70 of about 31,733 (262)

Landscape composition as a determinant of diversity and functional feeding groups of aquatic macroinvertebrates in southern rivers of the Araucanía, Chile

Latin American Journal of Aquatic Research, 2015
Changes in land use which directly or indirectly affect freshwater fauna constitute one of the principal anthropic factors which have caused world biological diversity to disappear rapidly during recent decades.
Pablo Fierro, Carlos Bertrán, Maritza Mercado, Fernando Peña-Cortés, Jaime Tapia, Enrique Hauenstein, Luciano Caputo, Luis Vargas-Chacoff   +7 more
doaj   +1 more source

The impact of climate-induced distributional changes on the validity of biological water quality metrics [PDF]

, 2010
We present data on the distributional changes within an order of macroinvertebrates used in biological water quality monitoring. The British Odonata (dragonflies and damselflies) have been shown to be expanding their range northwards and this could ...
Harvey, IF, Hassall, C, Thompson, DJ
core   +1 more source

Lessons Learnt From Long‐Term Monitoring of River Restoration in an English Chalk Stream

River Research and Applications, EarlyView.
ABSTRACT River restoration can be difficult to evaluate due to insufficient monitoring over timescales too short to adequately capture physical and ecological response. To better understand restoration outcomes, this study quantified changes in physical habitat (depth, velocity, substrate composition) and macroinvertebrates at two restoration projects ...
Lewis A. Dolman, Andrew S. Vowles, Paul S. Kemp   +2 more
wiley   +1 more source

Puyehue Cordón -Caulle: post-eruption analysis of changes in stream benthic fauna of Patagonia [PDF]

, 2014
Las erupciones volcánicas son los fenómenos naturales con las consecuencias más variadas y complejas, y tienen efectos importantes en ambientes tanto terrestres como acuáticos.
Juárez, Santiago Martín, Lallement, Mailén Elizabeth, Macchi, Patricio Jorge, Vigliano, Pablo Horacio   +3 more
core  

Geomorphic Effects and Habitat Impacts of Large Wood at Restoration Sites in New England

River Research and Applications, EarlyView.
ABSTRACT Large wood (used interchangeably with the term “instream wood”), which refers to trees, logs and other wood within a channel, is beneficial to river ecosystems and is being used more frequently as a component of river restoration projects. We identified metrics to evaluate the effectiveness of large wood to promote ecological and geomorphic ...
Audrey J. Turcotte, Noah P. Snyder, Mathias J. Collins   +2 more
wiley   +1 more source

Aquatic biosurvey of the Lovell River on UNH land [PDF]

, 2003
We assessed the physical, chemical and biological conditions at two sites along the Lovell River on University of New Hampshire (UNH) -owned conservation land. The discharge was 4.4 m3 s-1 at Site 1 and 5.7 m3 s -1 downstream at Site 2.
Barry, Lisa M., Bradt, Shane R., Carlson, Sonya C., Haney, James F., I., false Jorel, Knobelman, Kathleen, Kathleen B., Knox, Jessica L., Lund, Emily A., Peter, Chris R., Potter, Jody D., Quinn, Patrick K., Rivers, David, Skokan, Rachel D.   +12 more
core   +1 more source

Data Enrichment in Fine-Grained Classification of Aquatic Macroinvertebrates

2016 ICPR 2nd Workshop on Computer Vision for Analysis of Underwater Imagery (CVAUI), 2016
The types and numbers of benthic macroinverte-brates found in a water body reflect water quality. Therefore, macroinvertebrates are routinely monitored as a part of freshwater ecological quality assessment. The collected macroin-vertebrate samples are identified by human experts, which is costly and time-consuming.
Raitoharju, Jenni, Riabchenko, Ekaterina, Meissner, Kristian, Ahmad, Iftikhar, Iosifidis, Alexandros, Gabbouj, Moncef, Kiranyaz, Serkan   +6 more
openaire   +2 more sources

Effects of Engineered Dam Releases on Benthic Assemblages During Drought and Comparison With Unregulated Reaches

River Research and Applications, EarlyView.
ABSTRACT River regulation following damming is often associated with deleterious downstream effects, in large part due to reduced total discharge and disruption of seasonal flooding. These effects would be expected to be exacerbated by drought, particularly extended drought.
Jeffrey G. Holmquist, Jutta Schmidt‐Gengenbach   +1 more
wiley   +1 more source

Low flow controls on benthic and hyporheic macroinvertebrate assemblages during supra-seasonal drought [PDF]

, 2009
Despite the widely accepted importance of the hyporheic zone as a habitat for stream macroinvertebrates during floods, few data exist regarding community composition and distribution during periods of low flow or drought in perennial streamsi ...
Acuna, Battin, Bo, Bonada, Bou, Boulton, Boulton, Boulton, Boulton, Boulton, Boulton, Boulton, Brunke, Caruso, Clinton, Datry, Davy-Bowker, del Rosario, Demuth, Dewson, Dole-Olivier, Extence, Fenoglio, Gibert, Hannah, Harris, Harrison, Hendricks, Hose, Humphries, James, Lake, Lake, Lefebvre, Lytle, Malard, Malcolm, Marsh, Marsh, Marxsen, Meyer, Monk, Mulholland, Parr, Pinay, Prior, Smakhtin, Smakhtin, Smock, Stanford, Stofleth, Suren, Suren, Tallaksen, Tomlinson, Westwood, Williams, Wood, Wood, Wood, Wood, Wood, Wood, Wright, Wright, Youngson   +65 more
core   +2 more sources

Oxidative Damage, Energy Imbalance, and Behavioral Disruptions in Girardia tigrina Exposed to Treated Sewage Effluents

Environmental Toxicology, EarlyView.
ABSTRACT This study assessed the ecotoxicological effects of treated sewage on the freshwater planarian Girardia tigrina, integrating biochemical, energetic, and behavioral biomarkers. Planarians were exposed for 48 h to different concentrations of treated sewage (12.5%, 25%, 50%, and 100%) and compared to controls using commercial water and water from
Renata M. P. Freitas, Pedro H. Carvalho, Daniela de Melo e Silva, Carlos Gravato   +3 more
wiley   +1 more source