Outmoded
发表于 2025-3-26 23:15:22
Biomanipulation and food-web dynamics — the importance of seasonal stability a real grazing control was only observed in bags with addition of .. No direct grazing effects could be observed on the absolute or relative biomass of cyanobacteria (mainly .). The share of cyanobacteria in total phytoplankton biomass was lowest in summer (7–26%), higher in spring (39–63%) and mor
dapper
发表于 2025-3-27 05:08:02
Impact of whitefish on an enclosure ecosystem in a shallow eutrophic lake: selective feeding of fish by . on rotifers and allowed the latter to increase. In the fish enclosures, no marked changes in species composition were observed. Zooplankton predated by the fish seemed to be distributed near the walls of the enclosures. Problems of enclosure experiments for examining the effects of fish predat
alcoholism
发表于 2025-3-27 08:43:46
Impact of whitefish on an enclosure ecosystem in a shallow eutrophic lake: changes in nutrient concee reported. The phytoplankton biomass was not affected much by the release of fish. Possible reasons are that the increase in density of rotifers reduced the biomass of available phytoplankton and also that inedible Cyanophyceae were in the decreasing phase of their seasonal succession and could not
CRACY
发表于 2025-3-27 10:53:17
Conditions for effective biomanipulation; conclusions derived from whole-lake experiments in Europe undesirable fish a little below the critical biomass rather than by extermination of these fish. (4) High piscivore diversity increases stability and reliability of food web manipulations. (5) Various techniques of food web manipulation should be combined, except poisoning the entire fish community
meretricious
发表于 2025-3-27 13:45:10
Fish manipulation as a lake restoration tool in shallow, eutrophic temperate lakes 1: cross-analysisloomforming cyanobacteria caused by between-lake variations in nutrient levels and probably also mixing- and flushing rates, (2) a difference in specific loss rates through sedimentation of the algal community prevaling after the fish manipulation, (3) a decreased impact of planktivorous fish with i
逗留
发表于 2025-3-27 21:28:51
Fish manipulation as a lake restoration tool in shallow, eutrophic, temperate lakes 2: threshold leve ratio of piscivorous to planktivorous fish. The maximum depth at which submerged macrophytes occurred, decreased exponentially with increasing P concentration. Submerged macrophytes were absent in lakes > 10 ha and with P levels above 250−300 .g P 1., but still abundant in some lakes < 3 ha at 650
BILE
发表于 2025-3-27 23:18:07
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单纯
发表于 2025-3-28 04:18:28
https://doi.org/10.1007/978-3-322-81683-2 implemented as a practical way of controlling these plants. During the eighties the concept of biomanipulation was broadened to include other aspects of the complex interactions between food-web components such as the different nutrient flux pathways. In order to be able to make long term predictio
黄瓜
发表于 2025-3-28 07:31:23
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inhumane
发表于 2025-3-28 10:44:17
https://doi.org/10.1007/978-3-663-20496-1th rate increased with zooplankton concentration, causing a net increase in the phytoplankton growth, a stimulatory effect probably through nutrient regeneration that overrides the losses due to grazing.