Results 231 to 240 of about 2,840,879 (289)
The Anatomical Record, EarlyView.Abstract Nowadays, Lepidosauria is a diverse group represented by squamates and the rhynchocephalian tuatara. However, their origins date back to the end of the Permian Period, when the stem lineages Lepidosauromorpha and Archosauromorpha diverged. Within the lepidosauromorph stem lineage, a few species have been described with unstable phylogenetic ...
Lísie Vitória Soares Damke +4 more
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Scaling and ecomorphology of lagomorph body shape and appendicular skeleton
The Anatomical Record, EarlyView.Abstract Body shape is one of the most prominent features of phenotypic variation. Yet, mammalian body shapes are poorly quantified and the underlying components contributing to its diversity and its relationship to other skeletal components are rarely tested.
Nia Brice, Coby Huizenga, Chris J. Law
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Human evolution and the obstetrical dilemma: The pelvic floor hypothesis
The Anatomical Record, EarlyView.Abstract Human childbirth is mechanically difficult because a large‐headed, broad‐shouldered fetus must pass through a comparatively narrow, twisted bony birth canal. Traditional explanations of this “obstetrical dilemma” emphasize the role of bipedal locomotion in inhibiting the evolution of a wider, more spacious pelvis.
Barbara Fischer, Ekaterina Stansfield
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Exceptional preservation informs the paleobiology of tapinocephalid dinocephalians
The Anatomical Record, EarlyView.Abstract The tapinocephalid dinocephalian Moschops is one of the most iconic taxa of the middle Permian, yet its paleobiology remains one of the least well‐known. Here, we address some aspects of paleoneurology and paleobiology of Moschops using CT scanning of four well preserved skulls from the upper Abrahamskraal Formation of South Africa. Two of the
Julien Benoit +6 more
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A new occurrence of tetrapod footprints from the Late Triassic of the Candelária Sequence, Brazil
The Anatomical Record, EarlyView.Abstract The Hyperodapedon Assemblage Zone of the Candelária Sequence (Santa Maria Supersequence, Paraná Basin) preserves one of the most significant Late Triassic continental vertebrate assemblages in southern Brazil. Despite the relatively well‐documented body fossil record from this interval, ichnological records remain comparatively scarce.
Murilo Andrade‐Silva +1 more
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Beaver herbivory on aquatic plants
Oecologia, 2006Herbivores have strong impacts on marine and terrestrial plant communities, but their impact is less well studied in benthic freshwater systems. For example, North American beavers (Castor canadensis) eat both woody and non-woody plants and focus almost exclusively on the latter in summer months, yet their impacts on non-woody plants are generally ...
Parker, John D. +2 more
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2008
Aquatic systems receive the bulk of their nutrient supply from stream inflow. In stream communities, and also in lakes with a stream outflow, the export of nutrients in outgoing stream water is a major factor in nutrient budgets of aquatic communities.
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Aquatic systems receive the bulk of their nutrient supply from stream inflow. In stream communities, and also in lakes with a stream outflow, the export of nutrients in outgoing stream water is a major factor in nutrient budgets of aquatic communities.
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Some effects of polyphenols on aquatic plants: I. Toxicity of phenols in aquatic plants
Bulletin of Environmental Contamination and Toxicology, 1981Physiological parameters such as cytoplasmic streaming and motility are used to analyze the effects of chemically different phenolic compounds. Test organisms included: Cyclotella cryptica, Dunaliella salina, Chlamydomonas reinhardii strain 137, Lemna minor and Euglena graclis.
D I, Stom, R, Roth
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Taxon, 1974
ASTON, H. I. Aquatic plants of Australia. A guide to the identification of the aquatic ferns and flowering plants of Australia, both native and naturalized. Illustrations chiefly by the author. Melbourne University Press I973 [p.o. Box 278, Carlton, South Carlton, Victoria 3053, Australia], 368 pp., I38 figs., 8i maps, I52 x 231/2 cm, buckram, publ.
H. C. D. de Wit, H. I. Aston
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ASTON, H. I. Aquatic plants of Australia. A guide to the identification of the aquatic ferns and flowering plants of Australia, both native and naturalized. Illustrations chiefly by the author. Melbourne University Press I973 [p.o. Box 278, Carlton, South Carlton, Victoria 3053, Australia], 368 pp., I38 figs., 8i maps, I52 x 231/2 cm, buckram, publ.
H. C. D. de Wit, H. I. Aston
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Phosphorus in primary aquatic plants
Water Research, 1973Abstract As with other organisms, phosphorus is an essential element for aquatic plants. It is a component of molecules such as the nucleic acids and adenosine triphosphate (ATP) involved in the vital processes of enzyme synthesis and energy transfer and its compounds play a basic role in the mechanisms of photosynthesis by which these plants act as ...
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