Effects of a simulated heat wave on photophysiology and gene expression of high- and low-latitude populations of Zostera marina

Winters, Gidon; Nelle, Peter; Fricke, Birgit; Rauch, Gisep; Reusch, Thorsten B. H.

doi:10.3354/meps09213

Cited by 105 publications

(104 citation statements)

References 52 publications

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“…They were exposed to a heat wave in a common garden experiment. Surprisingly, southern and northern populations lost shoots and showed damage due to heat to a similar extent (Bergmann et al 2010;Winters et al 2011). This was consistent with stress gene expression measurements during the acute heat stress.…”

Section: Range Shiftssupporting

confidence: 75%

The response of temperate aquatic ecosystems to global warming: novel insights from a multidisciplinary project

et al. 2012

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This article serves as an introduction to this special issue of Marine Biology, but also as a review of the key findings of the AQUASHIFT research program which is the source of the articles published in this issue. AQUASHIFT is an interdisciplinary research program targeted to analyze the response of temperate zone aquatic ecosystems (both marine and freshwater) to global warming. The main conclusions of AQUASHIFT relate to (a) shifts in geographic distribution, (b) shifts in seasonality, (c) temporal mismatch in food chains, (d) biomass responses to warming, (e) responses of body size, (f) harmful bloom intensity, (f), changes of biodiversity, and (g) the dependence of shifts to temperature changes during critical seasonal windows.

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Section: Range Shiftssupporting

confidence: 75%

The response of temperate aquatic ecosystems to global warming: novel insights from a multidisciplinary project

et al. 2012

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“…Heat stress experiments performed on eelgrass pop ulations from the Adriatic and Baltic Seas without a CO 2 subsidy at a maximum temperature of 25°C revealed significant up-regulation of genes coding for a variety of stress proteins in addition to sig nificant shoot losses (Bergmann et al 2010, Winters et al 2011. Although this experiment produced similar shoot losses in the absence of a CO 2 subsidy, increasing CO 2 availability eliminated the lethal effects of temperature on whole plant sugar accumulation, growth and vegetative proliferation.…”

Section: Discussionmentioning

confidence: 95%

“…Temperatures can approach 30°C during particularly warm summers, stressing eelgrass meadows throughout the southern Chesapeake Bay (Orth & Moore 1983, Moore & Jarvis 2008. Eelgrass can acclimate to temperatures below 25°C (Zimmerman et al 1989), but exposure to simulated heat waves above 25°C causes die-backs (Ehlers et al 2008) that can be linked to impaired photosynthetic performance (Winters et al 2011) as well as to the differential effects on respiration and CO 2 -limited photosynthesis that make eelgrass vulnerable to negative carbon balance above 25°C (Evans et al 1986, Zimmerman et al 1989. CO 2 stimulation of photosynthesis should reduce eelgrass vulnerability to negative carbon balance that is likely to occur with increasing frequency as the climate warms (Zimmerman et al 1997, Invers et al 2001.…”

Section: Introductionmentioning

confidence: 99%

Experimental impacts of climate warming and ocean carbonation on eelgrass Zostera marina

Zimmerman¹,

Hill²,

Jinuntuya³

et al. 2017

Mar. Ecol. Prog. Ser.

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“…Meadows may be heterogeneous as a consequence of temporal admixture events of repeated recruitment through time (originally proposed by Petit et al 2003for oaks, Becheler et al 2010; limited dispersal of pollen and seeds, leading to patchiness (Hämmerli & Reusch 2003); and local habitat selection (Oetjen & Reusch 2007, Oetjen et al 2010, Winters et al 2011. Alternatively, they can be homogeneous as a consequence of dominance by a few large genets/clones (Reusch et al 1999, Coyer et al 2008) and limited recruitment (Duarte et al 2006).…”

Section: Introductionmentioning

confidence: 99%

Eelgrass Zostera marina populations in northern Norwegian fjords are genetically isolated and diverse

Olsen¹,

Coyer

Stam³

et al. 2013

Mar. Ecol. Prog. Ser.

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Populations along the northern boundary of a marine species' distributional range in the NE Atlantic are expected to harbor lower standing genetic variation as a consequence of postglacial expansion following the last glacial maximum. Founder events and marginal habitat availability may render the edge populations more vulnerable to anthropogenic stress and less capable of rapid adaptation to global climate change, a concern for conservation and management. We analyzed meadow architecture, persistence and connectivity within and among 15 locations (600 samples genotyped with 8 microsatellite loci) in 3 fjords in Troms County, Norway (69°N). Whereas global mean allelic diversity (standardized for sample size) was in accordance with previous studies using the same markers, more extensive sampling revealed a broader range of allelic richness (mean = 2.85; range = 1.84 to 4.21) in the regional pool. Genotypic diversity was typically high, whereas large genets were rare (2 out of 15 locations). Population differentiation (F ST ) was 2 to 6 times higher between fjords than within fjords. A Bayesian (STRUCTURE) analysis also strongly supported the genetic distinctness of each fjord. Although 9 locations within the 60 km long Balsfjord were connected by gene flow, demographic connectivity may actually be low, as fixed differences were observed at 6 of the 9 locations, along with significantly positive inbreeding coefficients and strong substructure. Overall, our results suggest that these northern, leading-edge meadows are healthy, but vigilance is required to avoid further losses. Fjord-level management, especially of the larger fjords, will be sufficient to capture the range of variation.

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Effects of a simulated heat wave on photophysiology and gene expression of high- and low-latitude populations of Zostera marina

Cited by 105 publications

References 52 publications

The response of temperate aquatic ecosystems to global warming: novel insights from a multidisciplinary project

The response of temperate aquatic ecosystems to global warming: novel insights from a multidisciplinary project

Experimental impacts of climate warming and ocean carbonation on eelgrass Zostera marina

Eelgrass Zostera marina populations in northern Norwegian fjords are genetically isolated and diverse

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