Download PDF by Stuart Findlay, Robert L. Sinsabaugh: Aquatic Ecosystems: Interactivity of Dissolved Organic

By Stuart Findlay, Robert L. Sinsabaugh

ISBN-10: 008052754X

ISBN-13: 9780080527543

ISBN-10: 0122563719

ISBN-13: 9780122563713

Aquatic Ecosystems explains the interaction among numerous routine of topic and effort via ecosystems mediated by means of Dissolved natural topic. This publication offers details on how a lot DOM there's in a selected aquatic atmosphere and the place it originates. It explains no matter if the DOM composition varies at times and position to put. It additionally info how DOM turns into included into microbial meals webs, and provides a greater, clarifying, figuring out to its value of DOM. Dissolved natural topic (called DOM) is extremely vital in all aquatic ecosystems. even though it might sound that logs and leaves are extra very important, actually the DOM is extra an important as the DOM is in a sort that's to be had to be used through the entire organisms residing within the the water. in addition, DOM impacts complicated meals webs by way of mediating the provision of aquatic nutrition, metals, salts and minerals. DOM additionally impacts water readability, which after all has alters the best way animals and vegetation reside and feed within the water.There are many ways to check DOM and this publication makes a speciality of numerous critical questions. How a lot DOM is there in a specific aquatic ecosytem? the place does it come from? Does the composition of the DOM differ now and then and position to palce? How does DOM turn into integrated into microbial nutrition webs, that are the foundation of plant, invertebrate and vertebrate nutrition webs? How can the solutions to those and different questions about DOM be thought of jointly in order that a greater figuring out of the importance of DOM can emerge?

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Additional info for Aquatic Ecosystems: Interactivity of Dissolved Organic Matter (Aquatic Ecology)

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Teiser, M. L. O. 1993. Extracellular low molecular weight organic compounds produced by Synechococcus sp. and their roles in the food web of alkaline hot spring microbial mat communities. Ph. D. Dissertation, University of Oregon, Eugene, 197 pp. , and C. Layne. 1997. Nutrient recycling and herbivory as mechanisms in the topdown effect of fish on algae in lakes. Ecology 78:21–40. , and P. R. M. D. Visscher. 1984. Extracellular release by phytoplankton during photosynthesis in lake Grevelingen (SW Netherlands).

In White Clay Creek, a piedmont stream in Pennsylvania, algal biomass is as high as 100 mg Chlorophyll-a m–2 during vernal algal blooms that occur before trees leaf out and block sunlight penetrating to the stream channel (Kaplan and Bott, 1982). Presumably, this high contribution of in-stream production to stream carbon budgets translates to DOM inputs. As evidence, DOC concentration in White Clay Creek exhibited a diel change with an afternoon maximum as much as 40% greater than the daily minimum due to photosynthetic fixation and subsequent extracellular release (Kaplan and Bott, 1982, 1989).

And R. G. Wetzel. 1996. Loading and utilization of dissolved organic carbon from emergent macrophytes. Aquatic Botany 53:61–72. , and R. Rojí4cková. 1996. Stress factors enhancing production of algal exudates: A potential self-protective mechanism? Zeitschrift für Naturforschung C51:646–650. McKinley, K. , A. K. Ward, and R. G. Wetzel. 1977. A method for obtaining more precise measures of excreted organic carbon. Limnology and Oceanography 22:570–573. McKnight, D. , and C. M. Tate. 1997. Canada Stream: A glacial meltwater stream in Taylor Valley, South Victoria Land, Antarctica.

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Aquatic Ecosystems: Interactivity of Dissolved Organic Matter (Aquatic Ecology) by Stuart Findlay, Robert L. Sinsabaugh


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