Selection for life-history traits to maximize population growth in an invasive marine species.

Jaspers, Cornelia , Marty, Lise and Kiørboe, Thomas (2018) Selection for life-history traits to maximize population growth in an invasive marine species. Open Access Global Change Biology, 24 (3). 1164-1174 . DOI 10.1111/gcb.13955.

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Abstract

Species establishing outside their natural range, negatively impacting local ecosystems, are of increasing global concern. They often display life-history features characteristic for r-selected populations with fast growth and high reproduction rates to achieve positive population growth rates (r) in invaded habitats. Here, we demonstrate substantially earlier maturation at a 2 orders of magnitude lower body mass at first reproduction in invasive compared to native populations of the comb jelly Mnemiopsis leidyi. Empirical results are corroborated by a theoretical model for competing life-history traits that predicts maturation at the smallest possible size to optimize r, while individual lifetime reproductive success (R0), optimized in native populations, is near constant over a large range of intermediate maturation sizes. We suggest that high variability in reproductive tactics in native populations is an underappreciated determinant of invasiveness, acting as substrate upon which selection can act during the invasion process

Document Type: Article
Keywords: comb jelly; evolution of life-history traits; evolutionary biology; global change; invasion ecology; jellyfish; Mnemiopsis leidyi ; reproduction and population growth
Research affiliation: OceanRep > GEOMAR > FB3 Marine Ecology > FB3-EV Marine Evolutionary Ecology
Refereed: Yes
Open Access Journal?: No
DOI etc.: 10.1111/gcb.13955
ISSN: 1354-1013
Related URLs:
Projects: DFF-MOBILEX
Date Deposited: 17 Nov 2017 08:52
Last Modified: 01 Feb 2019 15:02
URI: http://oceanrep.geomar.de/id/eprint/40156

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