Causes and consequences of biotic homogenization in freshwater ecosystems Tập 101 Số 3-4 - Trang 113-122 - 2016
Danielle Katharine Petsch
Biotic homogenization goes beyond the increase in taxonomic similarity among communities. It also involves the loss of biological differences in any organizational level (e.g., populations or communities) in terms of functional, taxonomic or genetic features. There are many ways to measure biotic homogenization, and the results depend on temporal and spatial scales, ...... hiện toàn bộ
The Trophic Index of Macrophytes (TIM) – a New Tool for Indicating the Trophic State of Running Waters Tập 88 Số 1 - Trang 49-67 - 2003
Susanne C. Schneider, Arnulf Melzer
AbstractIn running waters, apart from structural degradation, nutrient input becomes increasingly important. To investigate the indicator values of as many species of submerged macrophytes as possible numerous samples of the sediment within macrophyte stands and the overlying water were taken in running waters throughout Bavaria, Germany. To develop the Trophic Ind...... hiện toàn bộ
Modelling of Nutrient Emissions in River Systems – MONERIS – Methods and Background Tập 96 Số 5 - Trang 435-483 - 2011
Markus Venohr, Ulrike Hirt, Jürgen Hofmann, Dieter Opitz, Andreas Gericke, Annett Wetzig, Stephanie Natho, Franziska Neumann, Jens Hürdler, Marisa Matranga, Judith Mahnkopf, Mathias Gadegast, Horst Behrendt
AbstractMONERIS is a semi‐empirical, conceptual model, which has gained international acceptance as a robust meso‐ to macro scale model for nutrient emissions. MONERIS is used to calculate nitrogen (N) and phosphorus (P) emissions into surface waters, in‐stream retention, and resulting loads, on a river catchment scale. This paper provides the first (i) comprehensi...... hiện toàn bộ
The Feeding Strategies of the Leech Erpobdella octoculata (L.): A Laboratory Study Tập 88 Số 1 - Trang 94-101 - 2003
U. Kutschera
AbstractThe feeding behaviour of the freshwater leech Erpobdella octoculata was analysed by exposing potential invertebrate and vertebrate prey organisms (alive, wounded or dead) to leech attack in dishes, in the laboratory. The fact that E. octoculata is a macrophagous feeder that swallows living prey organisms...... hiện toàn bộ
Life Cycle, Feeding and Production of Isoptena serricornis(Pictet, 1841) (Plecoptera, Chloroperlidae) Tập 89 Số 2 - Trang 165-174 - 2004
Tomáš Derka, José Manuel Tierno de Figueroa, Iľja Krno
AbstractSome aspects of the biology and ecology (life cycle, feeding and production) of a population of Isoptena serricornis in the Rudava River (Slovakia) are studied, reported and discussed. The life cycle is annual, with slow growth in autumn‐winter and fast growth in late summer and spring. The growth decreased two weeks before the Fa...... hiện toàn bộ
Enhancement of the MONERIS Model for Application in Alpine Catchments in Austria Tập 96 Số 5 - Trang 541-560 - 2011
Matthias Zessner, Ádám Kovács, Christian Schilling, Gerald Hochedlinger, Oliver Gabriel, Stephanie Natho, Simon Thaler, Georg Windhofer
AbstractMountainous catchments are usually not in focus of the modelling of nutrient fluxes on catchment scale. Out of 9 model approaches tested in the EU‐project EUROHARP only MONERIS claims to be capable of modelling nitrogen and phosphorus emissions in a landscape with mountainous slope. Results derived in the present study indicate that the MONERIS 2.14 model i...... hiện toàn bộ
Controlling the Growth of Microcystis Using Surged Artificial Aeration Tập 84 Số 3 - Trang 243-254 - 1999
Karl‐Erich Lilndenschmidt
AbstractThis paper investigates the effect of lake mixing, due to artificial hypolimnetic aeration, on the succession and ecological composition of selected phytoplankton species in Tegeler See, Berlin. Special attention is given to Microcystis, a nuisance bloom‐forming blue‐green algae and its competitor (in this lake) Cerat...... hiện toàn bộ
Variability of Organic Matter Processing in a Mediterranean Coastal Lagoon Tập 89 Số 5-6 - Trang 476-483 - 2004
Margarita Menéndez, Oliver Gutiérrez-Hernández, Neus Sanmartí, Francisco A. Comı́n
AbstractThe spatial variability of plant organic matter processing was studied experimentally in a shallow coastal lagoon (Tancada lagoon, average depth: 37 cm, area: 1.8 km2) in the Ebro River Delta (NE Spain). To determine the effect of hydrology and sediment characteristics on plant organic matter processing, leaves of Phragmite...... hiện toàn bộ