2
M.T. Arts and B.C. Wainman
In Chapter I, "Determination of Total Lipid, Lipid Classes, and Fatty Acids in
Aquatic Samples," Chris Parrish details simple and effective means for lipid
extraction and storage. He then sets out detailed instructions for lipid class analysis using the Iatroscan thin-layer chromatography system, which is not available
elsewhere in the literature.
The second chapter, "Fatty Acids as Trophic and Chemical Markers in Freshwater Ecosystems" by Guillermo Napolitano, begins with a clear explanation of
lipid nomenclature. The body of the chapter is concerned with the characteristics
of ideal lipid markers for trophic transfer studies. The author highlights several
promising candidates for biomarkers in many types of aquatic ecosystems of both
bacterial and algal origin.
The source of almost all the lipid for aquatic food webs is discussed in Chapter
3, "Irradiance and Lipid Production in Natural Algal PopUlations" by Bruce
Wainman, Ralph Smith, Hakumat Rai, and John Furgal. This international effort
was necessary to assemble a large matrix of lipid production, physical, and chemical data. These data are used to investigate seasonal fluctuations in lipid production and overnight reallocation of lipids. A highlight of this chapter is the use of
mathematical models to calculate whole-lake lipid production on an areal basis.
Once the source of carbon has been discussed, Chapter 4 looks at the conversion of phytoplankton into zooplankton lipid. In Chapter 4, "Lipids in Freshwater Zooplankton: Selected Ecological and Physiological Aspects," Michael
Arts explores several facets of lipid dynamics in zooplankton including the time
course of lipid deposition and loss, the presentation of lipid contents!concentration, lipids as indices of stress, and the putative effects of ultraviolet B on
zooplankton lipids. The chapter ends with a discourse on research needs and
suggested future directions.
The thread oflipids in zooplankton continues in Chapter 5, in which Clyde Goulden, Robert Moeller, James McNair, and Allen Place examine "Lipid Dietary Dependencies in Zooplankton." Through carefully controlled field and lab experiments.
these authors set out to to determine whether dietary lipids may limit lake zooplankton populations. Theirconclusion that protein and lipids each playa role in limiting zooplankton populations depending on the circumstances is an important one.
The planktonic material that cannot be used by the zooplankton ends up in the
benthic community. What the benthos does with this material is the subject of
Chapter 6, "Seasonal Dynamics of Lipids in Freshwater Benthic Invertebrates."
by Joann Cavaletto and Wayne Gardner. This encyclopedic recounting of the lipid
content and lipid class composition of benthic invertebrates ranges from the
perpetually lean Tubificidae to the obese Diporeia. This chapter illustrates how
seasonal lipid values and lipid class analyses provide powerful means for evaluating the physiological health of invertebrates and highlights the variety of lipid
storage strategies.
Just as lipids playa critical role in the health of the benthic and planktonic
invertebrates, they are also critical in the metabolism of fishes. Marshall Adams.
in Chapter 7, "Ecological Role of Lipids in the Health and Success of Fish
Populations," illustrates the absolute requirements of fish for adequate supplies
for lipids in overwintering, reproductive performance, and fry survival.
M.T. Arts and B.C. Wainman
In Chapter I, "Determination of Total Lipid, Lipid Classes, and Fatty Acids in
Aquatic Samples," Chris Parrish details simple and effective means for lipid
extraction and storage. He then sets out detailed instructions for lipid class analysis using the Iatroscan thin-layer chromatography system, which is not available
elsewhere in the literature.
The second chapter, "Fatty Acids as Trophic and Chemical Markers in Freshwater Ecosystems" by Guillermo Napolitano, begins with a clear explanation of
lipid nomenclature. The body of the chapter is concerned with the characteristics
of ideal lipid markers for trophic transfer studies. The author highlights several
promising candidates for biomarkers in many types of aquatic ecosystems of both
bacterial and algal origin.
The source of almost all the lipid for aquatic food webs is discussed in Chapter
3, "Irradiance and Lipid Production in Natural Algal PopUlations" by Bruce
Wainman, Ralph Smith, Hakumat Rai, and John Furgal. This international effort
was necessary to assemble a large matrix of lipid production, physical, and chemical data. These data are used to investigate seasonal fluctuations in lipid production and overnight reallocation of lipids. A highlight of this chapter is the use of
mathematical models to calculate whole-lake lipid production on an areal basis.
Once the source of carbon has been discussed, Chapter 4 looks at the conversion of phytoplankton into zooplankton lipid. In Chapter 4, "Lipids in Freshwater Zooplankton: Selected Ecological and Physiological Aspects," Michael
Arts explores several facets of lipid dynamics in zooplankton including the time
course of lipid deposition and loss, the presentation of lipid contents!concentration, lipids as indices of stress, and the putative effects of ultraviolet B on
zooplankton lipids. The chapter ends with a discourse on research needs and
suggested future directions.
The thread oflipids in zooplankton continues in Chapter 5, in which Clyde Goulden, Robert Moeller, James McNair, and Allen Place examine "Lipid Dietary Dependencies in Zooplankton." Through carefully controlled field and lab experiments.
these authors set out to to determine whether dietary lipids may limit lake zooplankton populations. Theirconclusion that protein and lipids each playa role in limiting zooplankton populations depending on the circumstances is an important one.
The planktonic material that cannot be used by the zooplankton ends up in the
benthic community. What the benthos does with this material is the subject of
Chapter 6, "Seasonal Dynamics of Lipids in Freshwater Benthic Invertebrates."
by Joann Cavaletto and Wayne Gardner. This encyclopedic recounting of the lipid
content and lipid class composition of benthic invertebrates ranges from the
perpetually lean Tubificidae to the obese Diporeia. This chapter illustrates how
seasonal lipid values and lipid class analyses provide powerful means for evaluating the physiological health of invertebrates and highlights the variety of lipid
storage strategies.
Just as lipids playa critical role in the health of the benthic and planktonic
invertebrates, they are also critical in the metabolism of fishes. Marshall Adams.
in Chapter 7, "Ecological Role of Lipids in the Health and Success of Fish
Populations," illustrates the absolute requirements of fish for adequate supplies
for lipids in overwintering, reproductive performance, and fry survival.