An V0-morph is an organism that changes in shape during growth such that its surface area is proportional to its volume to the power 0, so its surface area is constant.
The reason why the concept is important in the context of the
Dynamic Energy Budgettheory is that food (substrate) uptake is proportional to surface area, and maintenance to volume. The surface area that is of importance is that part that is involved in substrate uptake. Biofilms on a flat solid substrate are examples of V0-morphs; they grow in thickness, but not in surface area that is involved in nutrient exchange. Other examples are dinophytaand diatoms that have a cell wall that does not change during the cell cycle. During cell-growth, then the amounts of protein and carbohydrates increase, the vacuole shrinks. The outer membrane that is involved in nutrient uptake remains constant. At cell division, the daughter cells rapidly take up water, complete a new cell wall and the cycle repeats.
Rods (bacteria that have the shape of a rod and grow in length, but not in diameter) are a static mixture between a V0- and a
V1-morph, where the caps act as V0-morphs and the cylinder between the caps as V1-morph.The mixture is called static because the weight coefficients of the contributions of the V0- and V1-morph terms in the shape correction functionare constant during growth. Crusts, such as lichens that grow on a solid substrate, are a dynamic mixture between a V0- and a V1-morph, where the inner part acts as V0-morph, and the outer annulus as V1-morph.The mixture is called dynamic because the weight coefficients of the contributions of the V0- and V1-morph terms in the shape correction functionchange during growth.The Dynamic Energy Budgettheory explains why the diameter of crusts grow linearly in time at constant substrate availability.
Dynamic energy budget
shape correction function
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Morph- — Morph : ↑ morpho , Morpho . * * * morph , Morph : ↑morpho , ↑Morpho . mor|pho , Mor|pho , (vor Vokalen auch:) morph , Morph [zu griech. morphe̅, ↑Morphe] <Best. in Zus. mit der Bed.>: Gestalt, Form (z. B. morphol … Universal-Lexikon
morph- — morph(o) , morphe, morphique, morphisme ♦ Éléments, du gr. morphê « forme ». morph(o) , morphe, morphique, morphisme éléments, du gr. morphê, forme . ⇒MORPH(O) , (MORPH , MORPHO )élém. formant I. Élém. tiré du gr. «fo … Encyclopédie Universelle
morph — UK US /mɔːf/ verb [I or T] ► to change into something different, or to make something do this: morph (sth) into sth »We are going to morph into something that is no longer a niche company. ► IT to change one picture into another, or combine them … Financial and business terms
morph — (m[^o]rf), n. (Linguistics) A sequence of phonemes, often a word fragment, which constitutes the minimum unit of meaning or syntax within a given word. A morph may be one of several variants of a morpheme, depending for its individal form on the… … The Collaborative International Dictionary of English
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morph — (m[^o]rf), v. i. & t. To transform smoothly in imperceptible steps from one image to another, on a computer screen. [PJC] … The Collaborative International Dictionary of English
morph — [mo:f US mo:rf] v [I and T] [Date: 1900 2000; Origin: metamorphosis] to develop a new appearance or change into something else, or to make something do this morph into ▪ The river flooded its banks and morphed into a giant sea that swamped the… … Dictionary of contemporary English
morph... — morph..., Morph... vgl. ↑morpho..., Morpho … Das große Fremdwörterbuch