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, the
biological group, and the r... 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) comprehensive overview
of the model structur... 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
whole (preferentially Chironomus larvae) is documented. However, it was
repeatedly obs... 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 Fall Equinox and increased two weeks after
the Spring Equinox.... 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 in its current version is
not able... 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) Ceratium, a dinoflagellate. Due to the installation configuration,
the aerator... 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 Phragmites australis at the end of its vegetative cycle and whole
plants of ... hiện toàn bộ
Strategies of Coexistence of Two Species: Erpobdella octoculata and E. vilnensis (Hirudinea: Erpobdellidae) Tập 92 Số 4-5 - Trang 527-538 - 2007
Jana Schenková, Jiří Jarkovský, Jan Helešic
AbstractPopulations of Erpobdella octoculata and E. vilnensis were studied
monthly over two years (May 1999–April 2001) at four sampling points on the
river Rokytná (Czech Republic). The water depth and velocity were measured and
the Froude number for each sample was calculated to follow flow conditions above
the bottom. Temporal differences in biomass of the two species were studied by
comparing ... hiện toàn bộ
Life Cycle and Feeding Habits of Dina punctata Johansson, 1927 (Erpobdellidae, Hirudinea) in a Small Carpathian Stream Tập 96 Số 1 - Trang 39-47 - 2011
Pavel Beracko, Vladimír Košel
AbstractThe leech Dina punctata Johanson, 1927 inhabits various types of running
waters. This species appeared in Slovakia probably after the first
Rhine‐Main‐Danube canal was built. Because little is known about its ecology,
the aim of our study was to analyze the life cycle, individual growth rate,
reproduction parameters and food composition of D. punctata in the Vydrica
Stream. Samples of leec... hiện toàn bộ