滔滔不绝地说
发表于 2025-3-23 10:35:09
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Antimicrobial
发表于 2025-3-23 17:24:33
Grundlagen und Wirkweise der Kompression,arge grazers (.) in 18 bags during spring, summer and autumn in mesotrophic Lake Gjersjøen. In general, the seasonal effects on phytoplankton biomass were more marked than the effects of biomanipulation. Primary top-down effects of fish on zooplankton were conspicuous in all bags, whereas control of
猛然一拉
发表于 2025-3-23 19:46:46
Die Luftschaltung durch gesteuerte Schieber, study their predation effects on the plankton community. The fish fed mainly on adult chironomids during the period of their emergence (earlier part of the experimental period). Thereafter, the food preference was shifted to larvae of chironomids and crustacean zooplankters. The predation effects o
sleep-spindles
发表于 2025-3-24 00:31:35
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构想
发表于 2025-3-24 03:40:09
Komprimiertes Kennzahlen-Know-howsewage loading was diverted from the lake. Initially, the recovery of the lake proceeded well but after some years summer blooms of blue-green algae (.) increased again. High biomass of roach (. L.) was considered to play an important role in maintaining high algal productivity and biomass in the la
内疚
发表于 2025-3-24 09:36:13
,Ausgewählte Bereichskennzahlen,uring summers of 1984–86. In enclosures with a fish biomass similar to the biomass in the eutrophic area of the lake, the number of phytoplankton species was highest. In enclosures with a low fish biomass the phytoplankton was dominated by the greens. A high biomass of bream in the mesotrophic basin
Control-Group
发表于 2025-3-24 11:38:45
https://doi.org/10.1007/978-1-349-18871-0of such biomanipulation techniques for eutrophication management in the subtropics and tropics has been examined only recently. Subtropical cladoceran assemblages differ from those of temperate lakes by their low species richness, early summer gameogenesis, and greatly reduced body size. Eutrophic F
HALL
发表于 2025-3-24 15:39:27
Komsomol Participation in Education,ty of biomanipulation as a management tool should be derived only from whole-lake studies, the results of which were followed for at least three to five years. There are only a few experiments and applications of that type from which the following conclusions can be drawn: (1) Food web manipulation
FLORA
发表于 2025-3-24 22:27:28
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万花筒
发表于 2025-3-24 23:31:26
Silke Allmann,Jorina Talmon-Grose water concentration of total phosphorus (P) and the occurrence of phytoplankton, submerged macrophytes and fish in Danish lakes are combined with results from three whole-lake fish manipulation experiments. After removal of less than 80 per cent of the planktivorous fish stock a short-term trophic