Results 171 to 180 of about 18,562 (221)
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Submergent Macrophytes: Growth Under Winter Ice Cover
Science, 1976Densities of 26 submergent macrophyte species were determined in situ regularly for 3 years by individuals using self-contained underwater breathing apparatus (scuba). Although most of these species grew only during the summer, ten maintained high population densities and productivity throughout the winter. Maximum winter photosynthetic activity was 10
C W, Boylen, R B, Sheldon
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Combined toxicity of microplastic and lead on submerged macrophytes
Chemosphere, 2022Microplastic pollution has become ubiquitous due to industrialization and wide use of plastic products. The continuous discharge of microplastics into aquatic ecosystems, combined with different toxic chemicals can create serious environmental pollution.
Hirpa, Abduro Ogo +4 more
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Regulation of photosynthetic rates of submerged rooted macrophytes
Oecologia, 1989Fourteen temperate, submerged macrophytes were cultivated in the laboratory at high DIC levels (3.3-3.8 mM), 10.4-14.4 mol photons (PAR) m-2 d-1 and 15°C. Photosynthesis at photosaturation ranged between 0.59 and 17.98 mg O2 g-1 DW h-1 at ambient pH (8.3) and were markedly higher between 1.76 and 47.11 mg O2 g-1 DW h-1 at pH 6.5 under elevated CO2 ...
Nielsen, Søren L., Jensen, Kaj Sand
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Microcystin production in epiphytic cyanobacteria on submerged macrophytes
Toxicon, 2010Cyanotoxins have been largely studied in planktonic and benthic cyanobacteria, but microcystin (MCYST) production in epiphytic cyanobacteria has not been reported yet. The present study reports for the first time the MCYST production in epiphytic cyanobacteria on submerged macrophytes.
Zakaria A, Mohamed +1 more
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Modeling Refuge Effect of Submerged Macrophytes in Lake System
Bulletin of Mathematical Biology, 2016This paper considers a significant problem in biological control of algae issue in ecological environment. A four-dimensional dynamic model is carefully formulated to characterize the interactions among phytoplankton, submerged macrophyte, zooplankton, and general fish class in a lake ecosystem.
Lv, Dongyu +3 more
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A QUANTITATIVE SAMPLER FOR SUBMERGED AQUATIC MACROPHYTES
Journal of the Limnological Society of Southern Africa, 1976SUMMARY A simple rotary sampler, capable of quantitatively harvesting submerged aquatic macrophytes is described. The sampler can be operated from a boat and consists of a central rod with a specially designed cutting blade at the base, and collecting hooks to catch the cut material.
C. HOWARD-WILLIAMS, T. G. LONGMAN
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Epiphytic meiofauna in stands of different submerged macrophytes [PDF]
Ekoloji, 2009 Epiphytic meiofauna in association with pure stands of four macrophytes (Nymphoides peltata, Ceratophyllum demersum, Polygonum amphibium and Carex spp.) were studied in the slow-flowing Conakut Channel, within the Kopacki rit floodplain, Croatia, during two vegetation seasons (2001 and 2002).
Čerba, Dubravka +3 more
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PALEOECOLOGY OF SUBMERGED MACROPHYTES IN THE UPPER CHESAPEAKE BAY
Ecological Monographs, 2000Fossil seed distributions of submerged aquatic vegetation (SAV) from dated sediment cores in tributaries of the upper Chesapeake Bay show prehistoric changes in species composition and abundance and reflect the response of SAV species to human disturbance since European settlement.
Grace S. Brush, William B. Hilgartner
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Microprofiles of oxygen in epiphyte communities on submerged macrophytes
Marine Biology, 1985Microprofiles of oxygen were measured by 2- to 10-μm diameter microelectrodes within 0.2- to 2.0-mm thick epiphyte layers on different marine and freshwater macrophytes during artificial light-dark cycles. The epiphyte community created large fluctuations in oxygen concentrations at the macrophyte surface by increasing the thickness of the layer around
Jensen, Kaj Sand +2 more
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Ecological Engineering, 2009
Abstract Radix swinhoei (H. Adams) is a freshwater snail commonly found in shallow regions of Lake Taihu. This research estimated, based on experiments, the consumption rates of R. swinhoei on three young submerged plants (Vallisneria spiralis, Hydrilla verticillata and Potamogeton malaianus) and its rates of nutrient release. Results showed that the
Kuan-Yi Li +3 more
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Abstract Radix swinhoei (H. Adams) is a freshwater snail commonly found in shallow regions of Lake Taihu. This research estimated, based on experiments, the consumption rates of R. swinhoei on three young submerged plants (Vallisneria spiralis, Hydrilla verticillata and Potamogeton malaianus) and its rates of nutrient release. Results showed that the
Kuan-Yi Li +3 more
openaire +1 more source