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標(biāo)題: Titlebook: Biomanipulation Tool for Water Management; Proceedings of an In Ramesh D. Gulati,Eddy H. R. R. Lammens,Ellen Donk Conference proceedings 19 [打印本頁]

作者: 落后的煤渣    時間: 2025-3-21 19:03
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作者: 我還要背著他    時間: 2025-3-21 23:07
978-90-481-4074-9Springer Science+Business Media Dordrecht 1990
作者: emulsify    時間: 2025-3-22 04:06

作者: cogitate    時間: 2025-3-22 05:35

作者: Subjugate    時間: 2025-3-22 11:31
,Bizet, Georges Alexandre César Léopold,n ingested, they are poorly utilized..An increase in herbivores might be the expected result of biomanipulation of the aquatic food chain. This attempt at controlling the algae population is, however, destined to fail if zooplankton do not also utilize blue-greens as food. In this respect, a series
作者: vocation    時間: 2025-3-22 15:54
,Benda, Georg (Anton) (Ji?í Antonín),rge-bodied ., the following observations on succession of phytoplankton were made: 1) whereas . could control the density of all the photoplankton size classes, the lake zooplankton could not suppress the large-sized phytoplankters or net phytoplankton; 2) the lake zooplankton was able to control th
作者: 帶子    時間: 2025-3-22 19:41

作者: 暴行    時間: 2025-3-22 21:53
,Berechnung der Hülsenbelastung,stfelden Reservoir. Limnological parameters were regularly monitored in all the three water bodies over three months or longer. The objective of the experiments was to induce a clear-water period in turbid eutrophic waters by direct manipulation of the zooplankton community. Introduction of four mil
作者: 多山    時間: 2025-3-23 04:32
Kompressionssyndrome peripherer Nerven lakes which encompass a broad range of productivity (ultra-oligotrophic Lake Tahoe, mesotrophic Castle Lake, and strongly eutrophic Clear Lake). To assess the potential strength of grazing in each lake, we evaluated algal responses to a 16-fold range of zooplankton biomass. To better compare algal
作者: 悲痛    時間: 2025-3-23 07:22

作者: 滔滔不絕地說    時間: 2025-3-23 10:35

作者: Antimicrobial    時間: 2025-3-23 17:24
Grundlagen und Wirkweise der Kompression,arge grazers (.) in 18 bags during spring, summer and autumn in mesotrophic Lake Gjersj?en. 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
作者: 猛然一拉    時間: 2025-3-23 19:46
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
作者: sleep-spindles    時間: 2025-3-24 00:31

作者: 構(gòu)想    時間: 2025-3-24 03:40
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
作者: 內(nèi)疚    時間: 2025-3-24 09:36
,Ausgew?hlte 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
作者: Control-Group    時間: 2025-3-24 11:38
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
作者: HALL    時間: 2025-3-24 15:39
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
作者: FLORA    時間: 2025-3-24 22:27

作者: 萬花筒    時間: 2025-3-24 23:31
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
作者: cardiovascular    時間: 2025-3-25 04:19
Sebastian Pranz,Christian Sauera dominance of planktivorous fish. In order to improve lake water quality by means of biomanipulation, a total of 2.5 tons of bream (.)and roach (.)was removed during 1986 and the spring of 1987. The planktivorous/benthivorous fish biomass was thereby reduced by approximately 50%, from 30 to 15 g WW
作者: 強(qiáng)制令    時間: 2025-3-25 07:31

作者: Hyperplasia    時間: 2025-3-25 15:32

作者: Figate    時間: 2025-3-25 17:06

作者: abreast    時間: 2025-3-25 22:02
Are blue-green algae a suitable food for zooplankton? An overviewen widely investigated by many authors with contrasting and inconclusive results. Two main factors seem to play important role in determining their suitability as food: the biochemical properties of the different species, or even different strains of the same species; and the shape and size of the c
作者: 惡意    時間: 2025-3-26 02:11
Analysis of phytoplankton-zooplankton relationships in an oligotrophic lake under natural and maniputh 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.
作者: biopsy    時間: 2025-3-26 06:32
Biomanipulation by introduction of herbivorous zooplankton. A helpful shock for eutrophic lakes?ividuals of . (0.6 ind. 1.) were introduced at the beginning of August. The daphnids soon increased 60-fold in their density causing a persistently high water transparency and low phytoplankton biomass up to November. Ammonia concentration rose steeply, whereas that of nitrate and oxygen decreased.
作者: 厚顏    時間: 2025-3-26 09:19

作者: Enteropathic    時間: 2025-3-26 14:18
Why do cladocerans fail to control algal blooms?xperimental data on four differently-sized . species are used in an attempt to (1) explain why cladocerans fail to control filamentous cyanobacteria when filament density is high, and (2) determine the critical filament density at which . becomes ineffective. At this critical concentration, . growth
作者: boisterous    時間: 2025-3-26 19:27
Structural and grazing responses of zooplankton community to biomanipulation of some Dutch water bod (150 .m) and zooplankton indicated a Monod type relationship, with an initial part of the curve in which the zooplankton responds linearly to the seston increase up to about .. 2 mg C l., followed by a saturation of zooplankton mass (0.39 mg C l.) at 3–4 mg C l. seston, and an inhibitory effect on
作者: Outmoded    時間: 2025-3-26 23:15
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
作者: dapper    時間: 2025-3-27 05:08
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
作者: alcoholism    時間: 2025-3-27 08:43
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
作者: CRACY    時間: 2025-3-27 10:53
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
作者: meretricious    時間: 2025-3-27 13:45
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
作者: 逗留    時間: 2025-3-27 21:28
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
作者: BILE    時間: 2025-3-27 23:18

作者: 單純    時間: 2025-3-28 04:18
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
作者: 黃瓜    時間: 2025-3-28 07:31

作者: inhumane    時間: 2025-3-28 10:44
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.
作者: 北極熊    時間: 2025-3-28 16:20

作者: jungle    時間: 2025-3-28 20:51
Kompressionssyndrome peripherer Nerven weak coupling between phytoplankton and zooplankton in Clear Lake and Lake Tahoe, two lakes which lie near opposite extremes of lake trophic status for most lakes. These observations, along with work reported by other researchers, suggest that linkages between zooplankton and phytoplankton may be w
作者: Obsessed    時間: 2025-3-28 23:36

作者: Madrigal    時間: 2025-3-29 04:16

作者: 過份    時間: 2025-3-29 07:20
Grundlagen und Wirkweise der Kompression, 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
作者: 態(tài)學(xué)    時間: 2025-3-29 13:13

作者: 貞潔    時間: 2025-3-29 18:43
https://doi.org/10.1007/978-3-662-25489-9e 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
作者: alabaster    時間: 2025-3-29 23:30

作者: 倔強(qiáng)不能    時間: 2025-3-30 02:56
Silke Allmann,Jorina Talmon-Grosloomforming 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
作者: 確定方向    時間: 2025-3-30 05:32
Silke Allmann,Jorina Talmon-Grose 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
作者: 平躺    時間: 2025-3-30 09:44

作者: 小爭吵    時間: 2025-3-30 13:09

作者: carotid-bruit    時間: 2025-3-30 18:23

作者: Introvert    時間: 2025-3-30 23:33

作者: Pathogen    時間: 2025-3-31 03:01

作者: 哄騙    時間: 2025-3-31 06:00
Analysis of phytoplankton-zooplankton relationships in an oligotrophic lake under natural and manipuy nutrient-limited. The effects of biomanipulation on zooplankton-phytoplankton relationships were assessed by monitoring both individual species and whole-assemblage responses. Two sizes of enclosures were used (15 and 350 litres) and two treatments were assayed: 1) removal of zooplankton by 45 .m
作者: REIGN    時間: 2025-3-31 12:48
Biomanipulation by introduction of herbivorous zooplankton. A helpful shock for eutrophic lakes?stfelden Reservoir. Limnological parameters were regularly monitored in all the three water bodies over three months or longer. The objective of the experiments was to induce a clear-water period in turbid eutrophic waters by direct manipulation of the zooplankton community. Introduction of four mil
作者: 串通    時間: 2025-3-31 13:44
The zooplankton-phytoplankton interface in lakes of contrasting trophic status: an experimental comp lakes which encompass a broad range of productivity (ultra-oligotrophic Lake Tahoe, mesotrophic Castle Lake, and strongly eutrophic Clear Lake). To assess the potential strength of grazing in each lake, we evaluated algal responses to a 16-fold range of zooplankton biomass. To better compare algal
作者: SPURN    時間: 2025-3-31 20:19
Why do cladocerans fail to control algal blooms?g clear water phase in lakes) or months (low-stocked fish-ponds). In the absence of planktivorous fish, large-bodied cladocerans effectively control the abundance of algae of a broad size spectrum. Laboratory experiments show that, although difficult to handle and of poor nutritional value, filament
作者: PALL    時間: 2025-4-1 01:32
Structural and grazing responses of zooplankton community to biomanipulation of some Dutch water bodhallow) and mesotrophic (deep) lakes in The Netherlands. The biomanipulated lakes had lesser number of species and their abundance, both of rotifers and crustaceans, and had much larger mean animal size (3–11 .g C ind..) than in the unmanipulated eutrophic lakes (0.65 .g C ind..). Whereas . ( = .) a
作者: 固執(zhí)點好    時間: 2025-4-1 02:12

作者: colostrum    時間: 2025-4-1 06:15

作者: tenosynovitis    時間: 2025-4-1 10:33

作者: 平躺    時間: 2025-4-1 16:13
A fading recovery: the role of roach (, L.) in maintaining high phytoplankton productivity and biomasewage 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
作者: 沒花的是打擾    時間: 2025-4-1 21:53

作者: encyclopedia    時間: 2025-4-2 02:15

作者: FRONT    時間: 2025-4-2 06:38
Conditions for effective biomanipulation; conclusions derived from whole-lake experiments in Europety 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




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