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Temperature and organism size-A biological law for ectotherms? Advances in Ecological Research 25: 1
- D. Atkinson
- Business, Materials Science
The intraspecific scaling of metabolic rate with body mass in fishes depends on lifestyle and temperature.
A new model postulates that the metabolic scaling exponent (b) varies between 2/3 and 1, and is inversely related to the elevation of the intraspecific scaling relationship (metabolic level, L), which in turn varies systematically among species in response to various ecological factors.
Predicting marine phytoplankton maximum growth rates from temperature: Improving on the Eppley curve using quantile regression
The Eppley curve describes an exponential function that defines the maximum attainable daily growth rate of marine phytoplankton as a function of temperature. The curve was originally fitted by eye…
Why are organisms usually bigger in colder environments? Making sense of a life history puzzle.
Diversity of arbuscular mycorrhizal fungi colonising roots of the grass species Agrostis capillaris and Lolium perenne in a field experiment
Analysis of arbuscular mycorrhizal fungal diversity through morphological characters of spores and intraradicular hyphae suggests the existence of a selection pressure of plants on AM fungal communities.
Warming-induced reductions in body size are greater in aquatic than terrestrial species
- J. Forster, A. Hirst, D. Atkinson
- Environmental ScienceProceedings of the National Academy of Sciences
- 5 November 2012
It is proposed that oxygen supply plays a central role in explaining the magnitude of ectothermic temperature-size responses and the environment-dependent differences parallel latitudinal body size clines will influence predicted impacts of climate warming on food production, community structure, and food-web dynamics.
Temperature-size responses match latitudinal-size clines in arthropods, revealing critical differences between aquatic and terrestrial species.
While body size decreases with warming and with decreasing latitude in multivoltine terrestrial arthropods, size increases on average in univoltines species, consistent with predictions from size vs. season-length trade-offs.
From cells to colonies: at what levels of body organization does the ‘temperature‐size rule’ apply?
It is found that the size:number responses varied among cell types and among structures at different levels of organization, with the inverse temperature‐size relationship applying only to larval parenchymal cells and colony modules.
Ecological Influences and Morphological Correlates of Resting and Maximal Metabolic Rates across Teleost Fish Species
The aerobic capacity model of the evolution of endothermy is supported, suggesting elevated body temperatures evolved as correlated responses to selection for high activity levels and in pelagic species with higher trophic levels.
Arbuscular mycorrhizal induced changes to plant growth and root system morphology in Prunus cerasifera.
It is concluded that AM fungal inoculation influenced processes in the root system at different levels, but not all effects were due to improved P nutrition or increased physiological age.