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The technique of allometry investigates the effects of size on such variables as food intake, energy requirements, growth rates and age at first reproduction. This book brings together much of what is known about the consequences of size and provides a new and mathematically rigorous framework within which many quantitative predictions are made and tested using published and unpublished data. Explanations are proposed for many previously unexplained phenomena such as why in some species females are thousands of times heavier than males, whereas in no species are males more than about eight times heavier than females. The models presented afford a synthesis of the effects of size and open up pathways for further theoretical investigation and experimental testing. Care has been taken to give verbal presentations of all the mathematical conclusions to ensure that the text is widely intelligible.

Allometry. --- Growth. --- Reproduction.

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Allometry, the study of the growth rate of an organism's parts in relation to the whole, has produced exciting results in research on animals. Now distinguished plant biologist Karl J. Niklas has written the first book to apply allometry to studies of the evolution, morphology, physiology, and reproduction of plants. Niklas covers a broad spectrum of plant life, from unicellular algae to towering trees, including fossil as well as extant taxa. He examines the relation between organic size and variations in plant form, metabolism, reproduction, and evolution, and draws on the zoological literature to develop allometric techniques for the peculiar problems of plant height, the relation between body mass and body length, and size-correlated variations in rates of growth. For readers unfamiliar with the basics of allometry, an appendix explains basic statistical methods. For botanists interested in an original, quantitative approach to plant evolution and function, and for zoologists who want to learn more about the value of allometric techniques for studying evolution, 'Plant Allometry' makes a major contribution to the study of plant life.

Plant allometry --- Plant allometry. --- ANA Anatomy & Morphology --- anatomy --- form --- metabolism --- morphology --- process --- reproduction

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Forest biomass --- Plant biomass --- Plant biomass --- Trees --- Plant allometry --- Carbon content --- Sampling

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This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact

Science: general issues --- Ecological science, the Biosphere --- ecology --- global change --- models --- allometry --- information theory --- metabolic theory of ecology (MTE) --- population dynamics --- ecology --- global change --- models --- allometry --- information theory --- metabolic theory of ecology (MTE) --- population dynamics

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In tropical rainforests, leaf area (LA) and leaf mass (LM) are essential metrics that influence key physiological processes and contribute to the assessment of forest productivity and carbon stocks. This study examines the relationship between structural parameters, LA and LM derived from both destructive sampling and handheld mobile laser scanning (HMLS) in tree-enriched areas of Central Africa.
By using this combination of sampling methods, we developed predictive allometric models for LA and LM. The calibrated models for LM showed strong performance criteria with R² values ranging from 74% to 81.81% and lower values for LA ranging from 72.5% to 79.32%.
Although the sample size in this study remains modest, our results highlight the potential of HMLS as a non-invasive and reliable method for estimating LA. Despite the promising results, the study notes limitations in the applicability of the models, particularly when it comes to extending the models to larger diameter trees.

Keywords: Functional traits, allometry, tropical forest, LiDAR, forest plantation, Congo Basin --- Sciences du vivant > Sciences de l'environnement & écologie