Trophic Dynamics and Niches of Salt Marsh Foraminifera
John J. Lee,William A. Muller +1 more
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In this paper, the growth of three species of littoral benthic foraminifera, Allogromia laticollaris, Rosalina leei, and Spiroloculina hyalina, have been made on laboratory-grown populations.Abstract:
Energetic considerations of the growth of three species of littoral benthic foraminifera, Allogromia laticollaris, Rosalina leei , and Spiroloculina hyalina , have been made on laboratory-grown populations. Under optimum laboratory conditions A. laticollaris has the greatest intrinsic rate of increase (r = 2.533 org/day); S. hyalina (r = 1.472 org/day), and R. leei (r = 0.272 org/day) being less fecund. The respiration rates of the three species were similar (0.5–4.5 μ1/mg body wt/hr) within the temperature range (15–35 C) tested. The species studied are selective feeders. Only 4-5 of 28 species of algae tested were consumed in significant quantities (40-150 × 108 g/foram/day). Although great numbers of bacteria were eaten, their biomass was negligible when compared to the algae. The ecological growth efficiency (Ee) of the three species tested is highest in fresh cultures (5-20%) and declines rapidly. Evidence suggests that the species studied are well adapted for the rapid changes in the microbial community structure which take place throughout the summer, and that community stability and high rate of productivity are achieved through diversity.read more
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Book ChapterDOI
The role of benthic foraminifera in deep-sea food webs and carbon cycling
TL;DR: Foraminifera playa largely unquantified but potentially significant role in deep-sea carbon cycling is potentially significant.
Journal ArticleDOI
Respiration rates in heterotrophic, free-living protozoa.
Tom Fenchel,B. J. Finlay +1 more
TL;DR: It is conceivable that protozoan species exist with lower maximum potential growth and metabolic rates than those predicted from cell volume and the equations derived from the available data, but the lack of information concerning the state of the cells studied prevents verification.
Journal ArticleDOI
Tolerance of Infaunal Benthic Foraminifera for Low and High Oxygen Concentrations.
Leon Moodley,Christoph Hess +1 more
TL;DR: Chambers formed in the laboratory under dysaerobic conditions have a significantly higher porosity than do chambers constructed in well oxygenated water, indicating that they are capable of facultative anaerobic metabolism.
Book ChapterDOI
Biotic Interactions in Benthic Foraminifera
TL;DR: Foraminifera have a long geologic record, extending back perhaps to the Cambrian, and they are both abundant and diverse during most of the Phanerozoic.
Journal ArticleDOI
The Ecology of Micro-and Meiobenthos
TL;DR: The role of the benthic micr of auna in sand gra ins has been investigated by Krogh and Sparck as discussed by the authors, who found that organisms belonging to groups of small size can adapt to the movement of life in the int ersti ces of sand grains.
References
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Competition, habitat selection, and character displacement in a patchy environment.
TL;DR: It is concluded that in the vicinity of the optimum design the vector (LFe, Lcu, AFe, Ace) cannot be varied in an arbitrary manner.
Distribution and Abundance
TL;DR: Rodent distribution and abundance in relation to season, habitat, and cover solely in agricultural habitats of Vigo County, Indiana was investigated in this paper, and the specific objective of this report is to relate those findings to explain the occurrence of these rodents in cultivated field ecosystems and to compare their results with those of previous studies to determine what changes, if any, have occurred in the distribution and abundances of these animals in cultivated fields.
Journal ArticleDOI
Gas Exchange in a Georgia Salt MARSH1
John M. Teal,John Kanwisher +1 more
TL;DR: In this paper, the oxygen consumption of the undisturbed marsh surface, of well-stirred mud samples, and of above and below-ground portions of Spartina was measured as were oxygen and rcdox profiles and sediment particle size.