Between a rock and a soft place: surfgrass colonizes sediments without attachment to rock

Stephens, Tiffany; Hughes, Brent B.; Kroeker, Kristy J.; Hessing‐Lewis, Margot; Monteith, Zachary L.; Morris, Mary E.; Raymond, Wendel W.

doi:10.1002/ecy.2791

Cited by 4 publications

(4 citation statements)

References 10 publications

(15 reference statements)

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“…Our observations have been regarded as anecdotal until now. However, this study could indicate a mechanism of adaptation of this seagrass, as has been observed in other seagrasses (Shafer et al, 2007;Stephens et al, 2019), favoring its steady presence in the intertidal over almost six years in this region. In fact, these observations do not concur with other results that show low resistance to local disturbances and environmental stress in the Canary Islands' seagrass meadows, because of their low genetic diversity compared to Mediterranean populations (Tuya et al, 2019).…”

Section: Resultssupporting

confidence: 64%

“…In fact, the only seagrass genus that are known to grow preferably on rocky substrate is Phyllospadix (Cooper & McRoy, 1988;Stephens et al, 2019). However, it is also common to find seagrasses that prefer sediment substrates like Amphibolis Antarctica, Thalassodendron pachyrhizum or T. ciliatum growing on hard substrates (den Hartog, 1970;Kirkman & Kuo, 1990) Despite this study being mostly descriptive, its aim is to highlight the continuous presence of C. nodosa over time in an environment, such as intertidal pools, considered extreme for most seagrasses (Hemminga & Duarte, 2000).…”

Section: Resultsmentioning

confidence: 99%

“…Higher seagrass diversity is found in tropical, temperate southern oceans and north Pacific bioregions, while Mediterranean and temperate north Atlantic host lower levels of diversity (Short et al, 2007). In the most diverse areas, it is common to find seagrass genera living in both intertidal and subtidal zones and in habitats with different substrates such as Phyllospadix, Amphibolis or Thalassodendron (Duffy et al, 2019;Stephens et al, 2019). In the northeast Atlantic, three seagrass species are present: Zostera marina, Zostera noltei and Cymodocea nodosa.…”

Section: Introductionmentioning

confidence: 99%

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The underreported presence of the subtidal seagrass Cymodocea nodosa in rocky intertidal pools of the Canary Islands

González-Lorenzo

Toledo-Guedes

Rodríguez-Riesco

et al. 2020

Marine Biology Research

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During 2014, 21 patches of Cymodocea nodosa were found in intertidal pools in Fuerteventura (Canary Islands). Pool substratum was mixed sand and rock, but mostly dominated by stone bottoms. Most plants were established with fully exposed rhizomes, filling small fissures without sediment. During subsequent sampling surveys between 2016 and 2019, the presence of these patches was consistent over time in an environment normally considered extreme for most seagrasses. As far as we know, the presence of various intertidal areas with Cymodocea nodosa patches has not been observed previously in the Canary Islands. If the presence of C. nodosa patches in these intertidal pools is stable over time, it raises new environmental management and conservation questions for this endangered species in the Canary Islands. In addition, due to the current regression of C. nodosa meadows, our observations represent an optimistic perspective that underline the need for specific monitoring plans for this ecosystem.

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Section: Resultssupporting

confidence: 64%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The underreported presence of the subtidal seagrass Cymodocea nodosa in rocky intertidal pools of the Canary Islands

González-Lorenzo

Toledo-Guedes

Rodríguez-Riesco

et al. 2020

Marine Biology Research

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“…1). Southeast Alaska contains over 10 000 km of seagrass shoreline (Harper & Morris 2004, NOAA 2019, primarily in protected, soft-sediment shorelines composed of seagrass Zostera marina, surfgrass Phyllo spadix serrulatus, and a mixture of the two (Stephens et al 2019). Seagrass beds in the region are often found in close proximity to other habitats, such as canopy and understory kelp forests, sand flats, and estuaries, creating a mosaic of nearshore habitats (O'Clair et al 1997, NOAA 2019.…”

Section: Study Areamentioning

confidence: 99%

Sea otter effects on trophic structure of seagrass communities in southeast Alaska

Raymond

Schram

Eckert

et al. 2021

Mar. Ecol. Prog. Ser.

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Previous research in southeast Alaska on the effects of sea otters Enhydra lutris in seagrass Zostera marina communities identified many but not all of the trophic relationships that were predicted by a sea otter-mediated trophic cascade. To further resolve these trophic connections, we compared biomass, carbon (δ13C) and nitrogen (δ15N) stable isotope (SI), and fatty acid (FA) data from 16 taxa at 3 sites with high and 3 sites with low sea otter density (8.2 and 0.1 sea otters km-2, respectively). We found lower crab and clam biomass in the high sea otter region but did not detect a difference in biomass of other seagrass community taxa or the overall community isotopic niche space between sea otter regions. Only staghorn sculpin differed in δ13C between regions, and Fucus, sugar kelp, butter clams, dock shrimp, and shiner perch differed in δ15N. FA analysis indicated multivariate dissimilarity in 11 of the 15 conspecifics between sea otter regions. FA analysis found essential FAs, which consumers must obtain from their diet, including 20:5ω3 (EPA) and 22:6ω3 (DHA), were common in discriminating conspecifics between sea otter regions, suggesting differences in consumer diets. Further FA analysis indicated that many consumers rely on diverse diets, regardless of sea otter region, potentially buffering these consumers from sea otter-mediated changes to diet availability. While sea otters are major consumers in this system, further studies are needed to understand the mechanisms responsible for the differences in biomarkers between regions with and without sea otters.

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Ecophysiological responses and self-protective canopy effects of surfgrass (Phyllospadix torreyi) in the intertidal

Ruiz‐Montoya

Sandoval‐Gil

Belando-Torrentes

et al. 2021

Marine Environmental Research

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Between a rock and a soft place: surfgrass colonizes sediments without attachment to rock

Cited by 4 publications

References 10 publications

The underreported presence of the subtidal seagrass Cymodocea nodosa in rocky intertidal pools of the Canary Islands

The underreported presence of the subtidal seagrass Cymodocea nodosa in rocky intertidal pools of the Canary Islands

Sea otter effects on trophic structure of seagrass communities in southeast Alaska

Ecophysiological responses and self-protective canopy effects of surfgrass (Phyllospadix torreyi) in the intertidal

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