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The Invasion and Spread of Phragmites australis during a Period of Low Water in a Lake Erie Coastal Wetland
Abstract Numerous studies have documented the invasion of wetland plants, yet few have tracked the invasion process from its early stages to subsequent large-scale, plant-community changes. TheExpand
Functionally distinct classes of complex phosphorus compounds in lake water1
Abstmct Complex phosphorus compounds were classified functionally according to the manner by which orthophosphate was released. Filtrable phosphorus compounds in two cutrophic lakes (East and WestExpand
Epilimnetic Phosphorus Cycling: Influence of Humic Materials and Iron on Coexisting Major Mechanisms
Two major orthophosphate recycling mechanisms, alkaline phosphatase activity and the photodependent release of P from UV-sensitive complex P, cooccurred in epilimnetic samples from four trophicallyExpand
UV‐sensitive complex phosphorus: Association with dissolved humic material and iron in a bog lake1
The concentration of uv-sensitive complex phosphorus compounds in water from an acid bog lake was linearly related to the concentration of dissolved high molecular weight humic material (DHM) bothExpand
Enhancement of nitrogen fixation inAnabaena flos-aquae (Cyanobacteria) via low-dose ultrasonic treatment
Low-dose (50 W), short-duration (5 min) ultrasonic treatments were delivered to log phase batch cultures of the cyanobacteriumAnabaena flos-aquae grown in nitrogen-free medium. Near the mid-point ofExpand
Aluminum sulfate treatment: Short-term effect on complex phosphorus compounds in a eutrophic lake
Application of aluminum sulfate to the hypolimnion of West Twin Lake, a hardwater eutrophic lake in northeastern Ohio, did not efficiently remove complex phosphorus compounds from the water column.Expand
DYNAMICS OF CELLULAR AND EXTRACELLULAR cAMP IN ANABAENA FLOS‐AQUAE (CYANOPHYTA): INTRINSIC CULTURE VARIABILITY AND CORRELATION WITH METABOLIC VARIABLES 1
The production and extracellular release of cyclic adenosine 3′: 5′‐monophosphate (cAMP) by the blue‐green alga Anabaena flos‐aquae (Lyngb.) Breb. varied greatly within and between active growthExpand
Effect of low-dose ultrasonic treatment on phystological variables inAnabaenaflos-aquae andSelenastrumcapricornutum
SummaryCell protein content in two species of cultured algaeAnabaenaflos-aquae andSelenastrumcapricornutum, was markedly enhanced by low-dose, short-duration ultrasonic treatment. Chlorophylla levelsExpand
The isolation of cyclic adenosine 3′:5′‐monophosphate (cAMP) from lakes of differing trophic status: Correlation with planktonic metabolic variables1
The seasonal dynamics of particulate and dissolved cyclic adenosine 3':5'-monophosphate (cAMP) were examined in the epilimnia and littoral zones of two trophically dissimilar lakes. Each cAMPExpand
Relationships Between Phosphorus Functional Classes and Alkaline Phosphatase Activity in Reservoir Lakes
ABSTRACT Dissolved phosphorus fractions present in the surface waters of a eutrophic reservoir lake in northcentral Oklahoma were characterized by chemical, enzymatic, and chromatographic techniques.Expand
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