First evidence of root morphological and architectural variations in young Posidonia oceanica plants colonizing different substrate typologies

Balestri, Elena; Battisti, Davide De; Vallerini, Flavia; Lardicci, Claudio

doi:10.1016/j.ecss.2015.01.002

Cited by 32 publications

(35 citation statements)

References 58 publications

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“…These results agree with field studies where sand promoted the formation of lateral roots, more than on rock (Balestri et al ). The nutrient content and the unconsolidated structure of the sand could enhance root growth of P. oceanica , while the hard glass limited elongation and nutrient acquisition.…”

Section: Discussionsupporting

confidence: 92%

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Influence of substrate and burial on the development of Posidonia oceanica: implications for restoration

Guerrero‐Meseguer

Sanz‐Lázaro

Suk-Ueng

et al. 2016

Restoration Ecology

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Posidonia oceanica is one of the few seagrasses that can colonize hard and soft substrates. To test whether substrate could affect root development of the seedlings, with a legacy effect upon transplantation to sand, we germinated seeds on hard (glass slide) versus soft (sand) substrates in microcosms. We found that sand favored root system development, with a compensatory slowing of leaf development, while glass had the opposite effect. After 4 months, we transplanted all seedlings to sand and tested for a legacy effect of initial substrate type. Leaves of seedlings germinated on sand and glass slides reached approximately the same length, but roots from seedlings germinated on glass did not develop fully. Seed burial (0–1.5 cm) did not affect seedling development. These results suggest that the culture of P. oceanica on sand prior to transplantation could enhance seedlings survival in restoration programs.

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Section: Discussionsupporting

confidence: 92%

“…However, this type of restoration has anchorage problems. Even though seedlings are capable of remaining anchored in different substrates (Badalamenti et al ; Balestri et al ), their roots are not long enough to adhere firmly (Balestri & Bertini ), so seedlings can be uprooted by waves and currents (Meinesz et al ).…”

Section: Introductionmentioning

confidence: 99%

Influence of substrate and burial on the development of Posidonia oceanica: implications for restoration

Guerrero‐Meseguer

Sanz‐Lázaro

Suk-Ueng

et al. 2016

Restoration Ecology

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“…5), whereas in the wettest year (1994) when stratification is already relatively high, the overall impact of SLR is dominated by the stratification effect and results in a net increase in the total volume of water with DO < 5 mg L −1 . The larger impact of SLR during dry years is consistent with a study from the Delaware Bay showing that high flow dampens the salinity intrusion that results from SLR (Ross et al, 2015) and with a study in San Francisco Bay finding that the impact of SLR is limited under high-flow conditions (Chua and Xu, 2014).…”

Section: How Will the Individual Impacts Of Climate Change (Increasedsupporting

confidence: 76%

“…The rate of warming used in this analysis is also consistent with projected increases from downscaled global climate models for the bay (Muhling et al, 2017). It is also slightly lower than the warming estimated using a high-resolution climate model (CM2.6) for the location of the ChesROMS open boundary (2.6 • C; Saba et al, 2016) and less than the average satellite-derived rate of bay surface water warming of 0.005-0.175 • C yr −1 from 1984 to 2007 (Ding and Elmore, 2015). The 1.75 • C water temperature increase was applied uniformly across time and space to biogeochemical processes and oxygen solubility throughout the bay, but the temperature increase was not applied to other physical properties or processes, such as water density gradients or meteorological forcing.…”

Section: Temperaturesupporting

confidence: 48%

“…In addition, recent trends in the intensification of early summer stratification have been found not to be due to water column temperature changes but rather are primarily due to changes in salinity as a result of SLR and altered freshwater inputs (Murphy et al, 2011). Changes in salinity along the ChesROMS open boundary on the continental shelf between the 1990s and the mid-20th century have been computed by Saba et al (2016) to be very minor (∼ 0.2 psu) and are thus not considered here. This is consistent with our goal of examining the first-order impacts of temperature change on hypoxia (through solubility and growth/grazing/remineralization changes); the effect of warming on Chesapeake Bay hydrodynamics is being analyzed in a separate follow-on study.…”

Section: Temperaturementioning

confidence: 99%

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The competing impacts of climate change and nutrient reductions on dissolved oxygen in Chesapeake Bay

et al. 2018

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Abstract. The Chesapeake Bay region is projected to experience changes in temperature, sea level, and precipitation as a result of climate change. This research uses an estuarine-watershed hydrodynamic-biogeochemical modeling system along with projected mid-21st-century changes in temperature, freshwater flow, and sea level rise to explore the impact climate change may have on future Chesapeake Bay dissolved-oxygen (DO) concentrations and the potential success of nutrient reductions in attaining mandated estuarine water quality improvements. Results indicate that warming bay waters will decrease oxygen solubility year-round, while also increasing oxygen utilization via respiration and remineralization, primarily impacting bottom oxygen in the spring. Rising sea level will increase estuarine circulation, reducing residence time in bottom waters and increasing stratification. As a result, oxygen concentrations in bottom waters are projected to increase, while oxygen concentrations at mid-depths (3 < DO < 5 mg L −1 ) will typically decrease. Changes in precipitation are projected to deliver higher winter and spring freshwater flow and nutrient loads, fueling increased primary production. Together, these multiple climate impacts will lower DO throughout the Chesapeake Bay and negatively impact progress towards meeting water quality standards associated with the Chesapeake Bay Total Maximum Daily Load. However, this research also shows that the potential impacts of climate change will be significantly smaller than improvements in DO expected in response to the required nutrient reductions, especially at the anoxic and hypoxic levels. Overall, increased temperature exhibits the strongest control on the change in future DO concentrations, primarily due to decreased solubility, while sea level rise is expected to exert a small positive impact and increased winter river flow is anticipated to exert a small negative impact.

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

Stephens

Hughes

Kroeker

et al. 2019

Ecology

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First evidence of root morphological and architectural variations in young Posidonia oceanica plants colonizing different substrate typologies

Cited by 32 publications

References 58 publications

Influence of substrate and burial on the development of Posidonia oceanica: implications for restoration

Influence of substrate and burial on the development of Posidonia oceanica: implications for restoration

The competing impacts of climate change and nutrient reductions on dissolved oxygen in Chesapeake Bay

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

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