Selection of heat-shock resistance traits during the invasion of the seaweed Gracilaria vermiculophylla

Hammann, Mareike; Wang, Gaoge; Boo, Sung Min; Aguilar-Rosas, Luis E.; Weinberger, Florian

doi:10.1007/s00227-016-2881-3

Cited by 26 publications

(30 citation statements)

References 51 publications

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“…As with other studies that use clonal propagation (e.g., Galloway, ), the consistency in phenotypic responses across field‐collected and common‐garden thalli indicates that population‐level differences likely have a genetic basis, but does not preclude a role for environmental history, phenotypic plasticity, or both. We note that previous studies of population‐level differentiation in G. vermiculophylla phenotypes (Hammann, Wang, Boo, Aguilar‐Rosas, & Weinberger, ; Hammann et al., ; Saha, Wiese, Weinberger, & Wahl, ; Wang et al., ) assayed populations that were not within the source region and thus could not separate prior adaptation from the signal of rapid evolution during the invasion that we infer here.…”

Section: Discussionmentioning

confidence: 67%

Combining niche shift and population genetic analyses predicts rapid phenotypic evolution during invasion

Sotka

Baumgardner

Bippus

et al. 2018

Evolutionary Applications

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The rapid evolution of non‐native species can facilitate invasion success, but recent reviews indicate that such microevolution rarely yields expansion of the climatic niche in the introduced habitats. However, because some invasions originate from a geographically restricted portion of the native species range and its climatic niche, it is possible that the frequency, direction, and magnitude of phenotypic evolution during invasion have been underestimated. We explored the utility of niche shift analyses in the red seaweed Gracilaria vermiculophylla, which expanded its range from the northeastern coastline of Japan to North America, Europe, and northwestern Africa within the last 100 years. A genetically informed climatic niche shift analysis indicates that native source populations occur in colder and highly seasonal habitats, while most non‐native populations typically occur in warmer, less seasonal habitats. This climatic niche expansion predicts that non‐native populations evolved greater tolerance for elevated heat conditions relative to native source populations. We assayed 935 field‐collected and 325 common‐garden thalli from 40 locations, and as predicted, non‐native populations had greater tolerance for ecologically relevant extreme heat (40°C) than did Japanese source populations. Non‐native populations also had greater tolerance for cold and low‐salinity stresses relative to source populations. The importance of local adaptation to warm temperatures during invasion was reinforced by evolution of parallel clines: Populations from warmer, lower‐latitude estuaries had greater heat tolerance than did populations from colder, higher‐latitude estuaries in both Japan and eastern North America. We conclude that rapid evolution plays an important role in facilitating the invasion success of this and perhaps other non‐native marine species. Genetically informed ecological niche analyses readily generate clear predictions of phenotypic shifts during invasions and may help to resolve debate over the frequency of niche conservatism versus rapid adaptation during invasion.

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Section: Discussionmentioning

confidence: 67%

Combining niche shift and population genetic analyses predicts rapid phenotypic evolution during invasion

Sotka

Baumgardner

Bippus

et al. 2018

Evolutionary Applications

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“…Our identification of a source region has implications for understanding the evolutionary ecology of the Gracilaria vermiculophylla invasion, in particular. Previous studies have suggested introduced populations evolved greater tolerance for heat stress and resistance to herbivory during the invasion (Hammann, Wang, Boo, Aguilar-Rosas, & Weinberger, 2016;Hammann, Wang, Rickert, Boo, & Weinberger, 2013). However, these studies compared introduced populations with South Korean and Chinese native populations that do not represent the source of the invasion.…”

Section: Discussionmentioning

confidence: 99%

Genetic identification of source and likely vector of a widespread marine invader

Krueger‐Hadfield

Kollars

Strand

et al. 2017

Ecology and Evolution

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The identification of native sources and vectors of introduced species informs their ecological and evolutionary history and may guide policies that seek to prevent future introductions. Population genetics provides a powerful set of tools to identify origins and vectors. However, these tools can mislead when the native range is poorly sampled or few molecular markers are used. Here, we traced the introduction of the Asian seaweed Gracilaria vermiculophylla (Rhodophyta) into estuaries in coastal western North America, the eastern United States, Europe, and northwestern Africa by genotyping more than 2,500 thalli from 37 native and 53 non‐native sites at mitochondrial cox1 and 10 nuclear microsatellite loci. Overall, greater than 90% of introduced thalli had a genetic signature similar to thalli sampled from the coastline of northeastern Japan, strongly indicating this region served as the principal source of the invasion. Notably, northeastern Japan exported the vast majority of the oyster Crassostrea gigas during the 20th century. The preponderance of evidence suggests G. vermiculophylla may have been inadvertently introduced with C. gigas shipments and that northeastern Japan is a common source region for estuarine invaders. Each invaded coastline reflected a complex mix of direct introductions from Japan and secondary introductions from other invaded coastlines. The spread of G. vermiculophylla along each coastline was likely facilitated by aquaculture, fishing, and boating activities. Our ability to document a source region was enabled by a robust sampling of locations and loci that previous studies lacked and strong phylogeographic structure along native coastlines.

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“…However, Agarophyton may also mitigate the functional loss to the system associated with a possible decline of Fucus since this neobiota is functionally similar (except for its biomass reduction in winter) to Fucus . Furthermore, Agarophyton is more robust with regard to several of the global change pressures (Weinberger et al , ; Hammann et al ) and directly benefits from OA and CO 2 ‐rich upwelling (Young and Gobler ).…”

Section: Discussionmentioning

confidence: 99%

Season affects strength and direction of the interactive impacts of ocean warming and biotic stress in a coastal seaweed ecosystem

Wahl

Werner

Buchholz

et al. 2019

Limnology & Oceanography

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The plea for using more "realistic," community-level, investigations to assess the ecological impacts of global change has recently intensified. Such experiments are typically more complex, longer, more expensive, and harder to interpret than simple organism-level benchtop experiments. Are they worth the extra effort? Using outdoor mesocosms, we investigated the effects of ocean warming (OW) and acidification (OA), their combination (OAW), and their natural fluctuations on coastal communities of the western Baltic Sea during all four seasons. These communities are dominated by the perennial and canopy-forming macrophyte Fucus vesiculosus-an important ecosystem engineer Baltic-wide. We, additionally, assessed the direct response of organisms to temperature and pH in benchtop experiments, and examined how well organism-level responses can predict community-level responses to the dominant driver, OW. OW affected the mesocosm communities substantially stronger than acidification. OW provoked structural and functional shifts in the community that differed in strength and direction among seasons. The organism-level response to OW matched well the community-level response of a given species only under warm and cold thermal stress, that is, in summer and winter. In other seasons, shifts in biotic interactions masked the direct OW effects. The combination of direct OW effects and OW-driven shifts of biotic interactions is likely to jeopardize the future of the habitat-forming macroalga F. vesiculosus in the Baltic Sea. Furthermore, we conclude that seasonal mesocosm experiments are essential for our understanding of global change impact because they take into account the important fluctuations of abiotic and biotic pressures.This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.Additional Supporting Information may be found in the online version of this article.

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Selection of heat-shock resistance traits during the invasion of the seaweed Gracilaria vermiculophylla

Cited by 26 publications

References 51 publications

Combining niche shift and population genetic analyses predicts rapid phenotypic evolution during invasion

Combining niche shift and population genetic analyses predicts rapid phenotypic evolution during invasion

Genetic identification of source and likely vector of a widespread marine invader

Season affects strength and direction of the interactive impacts of ocean warming and biotic stress in a coastal seaweed ecosystem

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