Assessing the biomass and distribution of submerged aquatic vegetation using multibeam echo sounding in Lake Towada, JapanLimnology - Tập 14 - Trang 39-42 - 2012
Kazuki Abukawa, Masumi Yamamuro, Zaal Kikvidze, Akira Asada, Chunhui Xu, Kenichi Sugimoto
Here we report on an advanced survey system that combines multibeam echo sounding with underwater photography, which was used to collect accurate data on the distribution and abundance of submerged aquatic vegetation (SAV) in Lake Towada. The use of this system enabled us to visualize the cover, height, and biomass of the SAV over the lake bottom, as well as to distinguish between different compon...... hiện toàn bộ
Grazing on toxic and non-toxic Microcystis aeruginosa PCC7820 by Unio douglasiae and Corbicula flumineaLimnology - Tập 10 - Trang 1-5 - 2008
Ying Liu, Ping Xie, Xiao-Ping Wu
To explore the potential grazing effects of mussels on Microcystis aeruginosa, a common bloom-forming phytoplankton, Unio douglasiae and Corbicula fluminea were fed with Scenedesmus obliquus, toxic and non-toxic strains of Microcystis aeruginosa as single food and as mixtures in the laboratory. When fed with single foods, U. douglasiae has similar clearance rates on the three algae populations, wh...... hiện toàn bộ
Observation of anoxic water mass in a tropical reservoir: the Cirata Reservoir in Java, IndonesiaLimnology - Tập 9 - Trang 81-87 - 2008
Yuichi Hayami, Koji Ohmori, Kenji Yoshino, Yudhi S. Garno
We conducted a transect survey of water quality and bottom sediments in a large tropical reservoir, the Cirata Reservoir, located on the Citarum River, West Java, Indonesia. In the main basin of this reservoir, the surface water contained high concentrations of chlorophyll a, up to 48 μg l−1, and most of the water body was occupied by thick anoxic water. The thickness of the surface oxygenated wat...... hiện toàn bộ
Genetic diversity of the submerged macrophyte Hydrilla verticillata (L. f.) Royle in a river system in JapanLimnology - Tập 1 - Trang 27-31 - 2000
T. Nakamura, Y. Kadono
The genetic diversity of Hydrilla verticillata was studied in the Kako River system, Hyogo Prefecture, southwestern Japan, including some of its tributaries. Sex expression (monoecy or dioecy), ploidy level (diploid or triploid), and isoenzyme phenotypes were investigated for plant samples collected from 51 sites along the water course. Monoecious plants occurred at 10 sites and dioecious plants ...... hiện toàn bộ
Distribution of polychlorinated biphenyls (PCBs), lead, and cadmium in Manko Tidal Flat, OkinawaLimnology - Tập 5 - Trang 177-183 - 2004
Yutaka Tashiro, Kaneshi Takahira, Hidemi Osada, Haruhiko Fujii, Akira Tokuyama
Concentrations of polychlorinated biphenyls (PCBs), Pb, and Cd in sediment samples from the Manko Tidal Flat, an important area for migratory birds in Okinawa, were analyzed. High concentrations of PCBs were detected in the sediment samples from sites under a bridge at the end of the Manko Flat, whereas Pb and Cd concentrations did not indicate specific pollution. The spatial distribution and homo...... hiện toàn bộ
Benthic diatom and macroinvertebrate assemblages, a key for evaluation of river health and pollution in the Shahrood River, IranLimnology - Tập 17 - Trang 95-109 - 2015
Moslem Sharifinia, Abbas Mahmoudifard, Kamyab Gholami, Javid Imanpour Namin, Zohreh Ramezanpour
The pre
sent study analyzed the relationships of two different biological assemblages (diatom and macroinvertebrate) when they are used to characterize a set of stations (from reference stations to impacted stations) within the Shahrood River. In particular, we examined the issue of concordance among these assemblages and the physicochemical parameters detected, using both multivariate and multime...... hiện toàn bộ