標(biāo)題: Titlebook: Aquatic Birds in the Trophic Web of Lakes; Proceedings of a sym Joseph J. Kerekes Conference proceedings 1994 Springer Science+Business Med [打印本頁] 作者: 空隙 時(shí)間: 2025-3-21 18:16
書目名稱Aquatic Birds in the Trophic Web of Lakes影響因子(影響力)
書目名稱Aquatic Birds in the Trophic Web of Lakes影響因子(影響力)學(xué)科排名
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書目名稱Aquatic Birds in the Trophic Web of Lakes網(wǎng)絡(luò)公開度學(xué)科排名
書目名稱Aquatic Birds in the Trophic Web of Lakes被引頻次
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書目名稱Aquatic Birds in the Trophic Web of Lakes讀者反饋
書目名稱Aquatic Birds in the Trophic Web of Lakes讀者反饋學(xué)科排名
作者: 難解 時(shí)間: 2025-3-21 21:37
Fish-eating bird abundance in oligotrophic lakes in Kejimkujik National Park, Nova Scotia, Canadathe same period (about 200 and 130 kg fish respectively) and the estimated fish production in these lakes, there is a close balance between the size of water body and its fish production to the occupancy and production of piscivorous birds.作者: reception 時(shí)間: 2025-3-22 01:00 作者: 我不重要 時(shí)間: 2025-3-22 06:28
https://doi.org/10.1007/978-3-662-28763-7) were correlated. However, the relative abundance of ., a diving duck that may compete with fish for food, was not correlated with pH. Although individual species may be affected, community level responses of waterfowl to acidity are either absent or hard to detect at our sites.作者: 不可磨滅 時(shí)間: 2025-3-22 11:48
Responses of breeding duck populations to changes in food supplyuctive success. Moulting numbers of male Tufted Duck were related to chironomid abundance, but not those of Scaup and Barrow’s Goldeneye. Moulting numbers were not associated with previous reproductive output.作者: IDEAS 時(shí)間: 2025-3-22 16:28 作者: 星星 時(shí)間: 2025-3-22 20:40
Conference proceedings 1994. As a consequence, the role of aquaticbirds in freshwater ecosystems has usually been ignored. .This volume contains a wide range of papers selected from thosepresented at the symposium and reviewed. .作者: ascetic 時(shí)間: 2025-3-22 22:26
s has often been overlooked. As a conspicuous part ofthe biota of water bodies, aquatic birds are indicators of theirtrophic state both in terms of species composition (quality) as wellas occupancy and breeding (quantity). Birds may also influence thetrophic state of a water body by importing nutrie作者: Allege 時(shí)間: 2025-3-23 02:55 作者: Costume 時(shí)間: 2025-3-23 07:47 作者: FAZE 時(shí)間: 2025-3-23 11:05
Abundance and feeding of wintering and migrating aquatic birds in two sampling areas of Lake Balatonitats. However, in other species (.), percentage distribution of food items more or less reflected the food resources of the two areas in the digestive tracts. I concluded that the former species are highly selective in their feeding.作者: 腐爛 時(shí)間: 2025-3-23 15:06
Wading bird use of established and newly created reactor cooling reservoirs at the Savannah River Sif a self-sustaining balanced biological community (BBC) at the reservoir. Even so, during the course of our studies, L-Lake had considerably less wetland vegetation,especially floating-leaved species such as yellow nelumbo (.), than did either of the two older reservoirs.作者: 抑制 時(shí)間: 2025-3-23 19:19
https://doi.org/10.1007/978-3-663-07204-1itats. However, in other species (.), percentage distribution of food items more or less reflected the food resources of the two areas in the digestive tracts. I concluded that the former species are highly selective in their feeding.作者: 牌帶來 時(shí)間: 2025-3-24 00:02
https://doi.org/10.1007/978-3-663-07204-1f a self-sustaining balanced biological community (BBC) at the reservoir. Even so, during the course of our studies, L-Lake had considerably less wetland vegetation,especially floating-leaved species such as yellow nelumbo (.), than did either of the two older reservoirs.作者: curettage 時(shí)間: 2025-3-24 02:55
Conference proceedings 1994n been overlooked. As a conspicuous part ofthe biota of water bodies, aquatic birds are indicators of theirtrophic state both in terms of species composition (quality) as wellas occupancy and breeding (quantity). Birds may also influence thetrophic state of a water body by importing nutrients (.e.g.作者: ALLAY 時(shí)間: 2025-3-24 06:37
f habitats. As a consequence, the role of aquaticbirds in freshwater ecosystems has usually been ignored. .This volume contains a wide range of papers selected from thosepresented at the symposium and reviewed. .978-94-010-4493-6978-94-011-1128-7作者: visual-cortex 時(shí)間: 2025-3-24 11:49 作者: ectropion 時(shí)間: 2025-3-24 14:50 作者: 吹牛大王 時(shí)間: 2025-3-24 19:12
https://doi.org/10.1007/978-3-663-07204-1minated the early spring diet at Lake Huron colonies near agricultural areas. At all other sites fish predominated in pellets and faeces, but garbage items were also recorded regularly. The species of fish consumed varied regionally, probably reflecting local availability. In Lake Ontario, Rainbow S作者: 不要不誠實(shí) 時(shí)間: 2025-3-25 02:01
https://doi.org/10.1007/978-3-663-07204-1o high diversity and biomass characterized by plant-associated forms like snails and isopods in areas covered by macrovegetation. The mean size of perch (. L.) increased, probably as a result of higher availability of macroinvertebrates in the vegetation. The perch reached a mean size where the spec作者: 慢慢流出 時(shí)間: 2025-3-25 06:46 作者: ENACT 時(shí)間: 2025-3-25 07:45 作者: 船員 時(shí)間: 2025-3-25 13:34
,Normalien für die Prüfung von Eisenblech, in 1990–91), and by mallards and herons (35% and 27% in 1981–82 and 22% and 24% in 1990–91 respectively) plays an appreciable role among birds. During the plant growing period (April-September), the contribution by birds can increase to 37% of total P input of the lake. Piscivorous bird colonies co作者: Oratory 時(shí)間: 2025-3-25 17:01
https://doi.org/10.1007/978-3-662-00272-8ng equal weight to each of the 7 lakes in the sample, confirmed that there is a significant correlation in winter between swan populations and macrophyte biomass for these lakes which show a wide range of size and trophic status.There was no such significant correlation in summer. All of the 8 data 作者: Excise 時(shí)間: 2025-3-25 21:56
https://doi.org/10.1007/978-3-642-92384-5ly modeled by linear and quadratic functions of shoreline length, color, pH, calcium and total phosphorus. Horned grebe abundance could not be modeled with this approach. The statistical techniques known collectively as generalized linear models provided a framework for the development of models for作者: gnarled 時(shí)間: 2025-3-26 00:23
Overwintering waterfowl on Swiss lakes: how are abundance and species richness influenced by trophicphic lakes in all guilds. Hypertrophic lakes may also have high densities of fisheaters because of the large populations of Cyprinid fish present. Diving duck densities are much lower in hypertrophic than in less nutrientloaded lakes, since their main food, the bivalve ., prefers less eutrophicated 作者: 較早 時(shí)間: 2025-3-26 06:28 作者: 策略 時(shí)間: 2025-3-26 10:48 作者: cataract 時(shí)間: 2025-3-26 16:28
Trophic web structure in a shallow eutrophic lake during a dominance shift from phytoplankton to subo high diversity and biomass characterized by plant-associated forms like snails and isopods in areas covered by macrovegetation. The mean size of perch (. L.) increased, probably as a result of higher availability of macroinvertebrates in the vegetation. The perch reached a mean size where the spec作者: 逃避責(zé)任 時(shí)間: 2025-3-26 17:06
Bird abundance and species richness on Florida lakes: influence of trophic status, lake morphology, tly impact the trophic status of the lakes under natural situations, but lake trophic status is a major factor influencing bird abundance and species richness on lakes. Bird abundance and species richness were not significantly correlated to other lake morphology or aquatic macrophyte parameters aft作者: 無法取消 時(shí)間: 2025-3-27 00:54
Nutrient additions by waterfowl to lakes and reservoirs: predicting their effects on productivity an N, and 70% of all P that entered the lake from external sources. Loads from all external sources totaled 840 mg P m. y.. Application of a nutrient load-response model to this concentration, the hydraulic load (0.25 m y.), and the water residence time (9.7 y) of Wintergreen Lake yielded an average a作者: 沒有準(zhǔn)備 時(shí)間: 2025-3-27 03:25 作者: spondylosis 時(shí)間: 2025-3-27 09:11 作者: 公共汽車 時(shí)間: 2025-3-27 11:01
Use of boreal forested wetlands by Pacific loons (, Lawrence) and horned grebes (, L.): relations wily modeled by linear and quadratic functions of shoreline length, color, pH, calcium and total phosphorus. Horned grebe abundance could not be modeled with this approach. The statistical techniques known collectively as generalized linear models provided a framework for the development of models for作者: RENAL 時(shí)間: 2025-3-27 15:10
Cormorant (, [L]) populations and patterns of abundance at breeding and feeding sites in Northern Ir in other habitats and at other times of the year are less certain. This study establishes the long term and regional patterns of abundance at breeding and feeding localities, which might in turn be related to diet.作者: florid 時(shí)間: 2025-3-27 20:26
Aquatic bird densities in two coastal lagoon systems in Chiapas State, Mexico, a preliminary assessmbodies ranged from 102.5 to 847.5 ha. Salinity varied seasonally being the lowest in July during the rainy season (1.0%o) and highest in February (35.8%0). The waters are hypertrophic with total phosphorus concentrations as high 900 mg m..作者: 編輯才信任 時(shí)間: 2025-3-28 01:07 作者: 狼群 時(shí)間: 2025-3-28 02:21 作者: 優(yōu)雅 時(shí)間: 2025-3-28 07:39
https://doi.org/10.1007/978-94-011-1128-7bird; ecosystem; fish; lake; trophic dynamics; wetland作者: 生命層 時(shí)間: 2025-3-28 10:59
978-94-010-4493-6Springer Science+Business Media Dordrecht 1994作者: Concrete 時(shí)間: 2025-3-28 15:18
https://doi.org/10.1007/978-3-663-07204-1pe waterfowl populations. Abundance and species richness are linear (abundance) and power functions (species richness) of lake area or shorelength, according to waterfowl guild. The remaining variation can partly be explained by variables related to the available food (coarse fish yield for piscivor作者: figurine 時(shí)間: 2025-3-28 22:02 作者: acrophobia 時(shí)間: 2025-3-28 23:12
https://doi.org/10.1007/978-3-663-07204-1digestibility of different food items within a diet, it was possible to calculate the energy consumption of the bird community in eutrophic Lake Esrom. As the production of food items and energy flow in Lake Esrom have been well studied, it was possible to relate the bird community to the trophic we作者: 縮短 時(shí)間: 2025-3-29 06:35
https://doi.org/10.1007/978-3-663-07204-1 in contaminant levels. To understand more fully contaminant loading outside the breeding season, we analysed the contents of 1298 freshly regurgitated pellets and 179 fresh faeces, collected in March and early April 1978–83, and between late December and late February 1990–91, from the vicinity of 作者: airborne 時(shí)間: 2025-3-29 07:29
https://doi.org/10.1007/978-3-663-07204-1Common Loon (.) and only lakes ≥40 ha produce their young. Broods of Common Merganser (.) occurred in lakes > 25 ha and loon and merganser broods together occurred only in lakes ≥ 80 ha. The fish production in the lakes was estimated from the total phosphorus vs fish yield relationship obtained in s作者: 補(bǔ)助 時(shí)間: 2025-3-29 13:07
https://doi.org/10.1007/978-3-663-07204-1ophic. Species diversity was higher in the hypertrophic area, primarily due to a higher number of Anatid species. Contents of crops, gizzards, and intestines were analysed in 321 of the 361 birds collected. Diet was similar in certain species (.) despite differences in the trophic state of their hab作者: 帳單 時(shí)間: 2025-3-29 16:31
https://doi.org/10.1007/978-3-663-07204-1that of two similar > 25-year-old reservoirs (1130-ha Par Pond and 87-ha Pond B) at the same site. L-Lake was constructed in 1984–1985 and filled in late 1985. Approximately 25% of the shoreline of L-Lake was planted with lacustrine vegetation in early 1987 in an attempt to speed the establishment o作者: miscreant 時(shí)間: 2025-3-29 23:10
https://doi.org/10.1007/978-3-663-07204-1an a decade of phytoplankton blooms and sparse submerged vegetation. During the expansion of submerged plants the number of resting and breeding waterfowl increased. The increase was significant for herbivorous birds such as coot (. L.) and mute swan (. (Gmelin)), but also for omnivorous dabbling du作者: 實(shí)施生效 時(shí)間: 2025-3-30 03:50
https://doi.org/10.1007/978-3-7091-4521-0 in other habitats and at other times of the year are less certain. This study establishes the long term and regional patterns of abundance at breeding and feeding localities, which might in turn be related to diet.作者: 狂熱語言 時(shí)間: 2025-3-30 06:27
https://doi.org/10.1007/978-3-7091-4521-0bodies ranged from 102.5 to 847.5 ha. Salinity varied seasonally being the lowest in July during the rainy season (1.0%o) and highest in February (35.8%0). The waters are hypertrophic with total phosphorus concentrations as high 900 mg m..作者: Efflorescent 時(shí)間: 2025-3-30 09:12
https://doi.org/10.1007/978-3-7091-4521-0us, lake morphology and aquatic macrophyte abundance.Average annual bird numbers ranged from 7 to 800 birds km. and bird biomass ranged from 1 to 465 kg km.. Total species richness ranged from 1 to 30 species per lake. Annual average bird numbers and biomass were positively correlated to lake trophi作者: 詢問 時(shí)間: 2025-3-30 15:36 作者: 砍伐 時(shí)間: 2025-3-30 20:27 作者: 肉身 時(shí)間: 2025-3-31 00:02
https://doi.org/10.1007/978-3-642-91357-0ter enters the lake after the end of the rainy season. Thus, strong inverse variations occur twice a year both in water depth and salinity level, with a major hydraulic flow to the sea between October and January.作者: 體貼 時(shí)間: 2025-3-31 00:50
https://doi.org/10.1007/978-3-642-91357-0end on the site where they release their excrements. Mallards were studied as model animal to evaluate this process. Mallards of different ages have different ecological roles. In the beginning of their individual life they reduce the trophic level but later they contribute to the eutrophication pro作者: colloquial 時(shí)間: 2025-3-31 06:03
https://doi.org/10.1007/978-3-662-00272-8Tomahawk Lagoon No 2, a small South Island, New Zealand, lake in which phytoplankton and macrophytes vary widely from year to year, in an irregular inverse cycle. Two years of further study confirmed that winter swan populations are directly correlated with macrophytes, for samples taken on a single作者: Anthrp 時(shí)間: 2025-3-31 12:17
https://doi.org/10.1007/978-3-642-92384-5ational Wildlife Refuge in east central Alaska were related to the limnological characteristics of those wetlands. Aquatic bird-wetland use surveys were conducted in conjunction with limnological sampling from May through September 1985–87 and May through August 1989. Results from logistic regressio作者: 職業(yè)拳擊手 時(shí)間: 2025-3-31 16:26
Beschaffenheit des zu verwendenden Materialshemical, and physical factors on habitat selection by black ducks (. Brewster) during brood-rearing. Acidity and trophic status varied greatly among the waterbodies, of which 20 were used by black ducks for rearing their young. Duck brood density was positively related to lake trophic status. The hi作者: 本能 時(shí)間: 2025-3-31 17:53 作者: 鋼筆記下懲罰 時(shí)間: 2025-4-1 00:49 作者: antidote 時(shí)間: 2025-4-1 04:43 作者: 賞錢 時(shí)間: 2025-4-1 08:56
