Twelve fundamental life histories evolving through allocation-dependent fecundity and survival

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Twelve fundamental life histories evolving through allocation-dependent fecundity and survival. / Johansson, Jacob; Brännström, Åke; Metz, Johan A.J.; Dieckmann, Ulf.

In: Ecology and Evolution, Vol. 8, No. 6, 01.03.2018, p. 3172-3186.

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Johansson, Jacob ; Brännström, Åke ; Metz, Johan A.J. ; Dieckmann, Ulf. / Twelve fundamental life histories evolving through allocation-dependent fecundity and survival. In: Ecology and Evolution. 2018 ; Vol. 8, No. 6. pp. 3172-3186.

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TY - JOUR

T1 - Twelve fundamental life histories evolving through allocation-dependent fecundity and survival

AU - Johansson, Jacob

AU - Brännström, Åke

AU - Metz, Johan A.J.

AU - Dieckmann, Ulf

PY - 2018/3/1

Y1 - 2018/3/1

N2 - An organism's life history is closely interlinked with its allocation of energy between growth and reproduction at different life stages. Theoretical models have established that diminishing returns from reproductive investment promote strategies with simultaneous investment into growth and reproduction (indeterminate growth) over strategies with distinct phases of growth and reproduction (determinate growth). We extend this traditional, binary classification by showing that allocation-dependent fecundity and mortality rates allow for a large diversity of optimal allocation schedules. By analyzing a model of organisms that allocate energy between growth and reproduction, we find twelve types of optimal allocation schedules, differing qualitatively in how reproductive allocation increases with body mass. These twelve optimal allocation schedules include types with different combinations of continuous and discontinuous increase in reproduction allocation, in which phases of continuous increase can be decelerating or accelerating. We furthermore investigate how this variation influences growth curves and the expected maximum life span and body size. Our study thus reveals new links between eco-physiological constraints and life-history evolution and underscores how allocation-dependent fitness components may underlie biological diversity.

AB - An organism's life history is closely interlinked with its allocation of energy between growth and reproduction at different life stages. Theoretical models have established that diminishing returns from reproductive investment promote strategies with simultaneous investment into growth and reproduction (indeterminate growth) over strategies with distinct phases of growth and reproduction (determinate growth). We extend this traditional, binary classification by showing that allocation-dependent fecundity and mortality rates allow for a large diversity of optimal allocation schedules. By analyzing a model of organisms that allocate energy between growth and reproduction, we find twelve types of optimal allocation schedules, differing qualitatively in how reproductive allocation increases with body mass. These twelve optimal allocation schedules include types with different combinations of continuous and discontinuous increase in reproduction allocation, in which phases of continuous increase can be decelerating or accelerating. We furthermore investigate how this variation influences growth curves and the expected maximum life span and body size. Our study thus reveals new links between eco-physiological constraints and life-history evolution and underscores how allocation-dependent fitness components may underlie biological diversity.

KW - determinate growth

KW - dynamic programming

KW - indeterminate growth

KW - marginal value theorem

KW - reproductive allocation

UR - http://www.scopus.com/inward/record.url?scp=85044545738&partnerID=8YFLogxK

U2 - 10.1002/ece3.3730

DO - 10.1002/ece3.3730

M3 - Article

VL - 8

SP - 3172

EP - 3186

JO - Ecology and Evolution

T2 - Ecology and Evolution

JF - Ecology and Evolution

SN - 2045-7758

IS - 6

ER -