Titlebook: Lake Veluwe, a Macrophyte-dominated System under Eutrophication Stress; Wim Vierssen,Michiel Hootsmans,Jan Vermaat Book 1994 Kluwer Academ

雪崩

Periphyton removal by freshwater micrograzers, the two tested crustacean species, . (L.) and . (L.), did not. . removed similar amounts of periphyton accumulated in the field as it did of laboratory-cultured periphyton..Removal rates ranged from 0.1–2.2 mg animal. day. ash-free dry weight (afdw) for different species, different temperatures and

调整校对

A growth analysis model for , L.,ates effects of light and age on plant photosynthesis, growth and development and on tuber bank dynamics. The vegetation is described in layers and consists of three subvegetations, each with its own tuber bank with a fixed tuber size. Self-shading between and within subvegetations is incorporated.

Adenocarcinoma

命令变成大炮

Sigmoidoscopy

The Zuiderzee: transformation of a brackishwater ecosystem, as one of the Border Lakes in 1956. Originally, this shallow lake (40 km., mean depth 1.3m) was inhabited by a variety of submerged macrophytes and a rich associated aquatic macrofauna. However, eutrophication caused a decline in diversity in the early seventies. Towards the mid seventies this deve

Osteons

不确定

Growth of , L. in a temperature-light gradient,t elongation was less pronounced and more secondary shoots were formed. Also, chlorophyll (a+b) content was higher in low light. Elongation increased with increasing temperature up to a plateau at 15 °C. The difference in elongation for different irradiances was similar to that reported for other ma

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Light-response curves of , L. as a function of plant age and irradiance level during growth,ifferent P-I models are discussed, leading to the conclusion that at the moment, no definitely ‘best-fitting’ model can be discerned. We decided to use both the hyperbolic tangent model (tanh model), which is often considered the ‘best’ model, and the often used rectangular hyperbola or Michaelis-Me

Cholesterol

Photoperiodic effects on photosynthesis and tuber production in , L.,e plants had produced tubers. Under continuous long-day conditions (regime 1) the number of tubers was low. Plants with at least one period of dim light or short-day conditions showed higher tuber numbers (on average 9 per plant)..The plants with at least one short-day period (i.e. in the first 55 d

fiction

Early growth characteristics of , L.: the significance of the tuber,on balance model was calibrated to these growth data and fitted the data reasonably well. The model made up mass balances with a time step of one day and had the following general form: Tuber import + photosynthetic production = maintenance respiration + growth respiration + growth. Major assumption