Intertidal ecology and potential power impacts, Bay of Fundy, Canada

Gordon, Donald C.

doi:10.1111/j.1095-8312.1994.tb00940.x

Cited by 18 publications

(2 citation statements)

References 8 publications

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“…Hodd (1977) and Gordon (1994) discussed impacts for the Bay of Fundy scheme. Baker (1991) and Matthews and Young (1992) review generic environmental impacts for tidal power schemes.…”

Section: Generic Impacts Of Tidal Power Schemesmentioning

confidence: 99%

Environmental impacts of tidal power schemes

Wolf

Walkington

Holt

et al. 2009

Proceedings of the Institution of Civil Engineers - Maritime En

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This paper describes the potential environmental changes caused by tidal power installations with illustration for schemes in the eastern Irish Sea, focussing mainly on major estuarine barrages. The generic impacts in the near-field and far-field are discussed. Results from a 0-D and a 2-D model are presented: the former allows rapid calculations to be made for a large range of options while the latter allows the full effect on 2D hydrodynamics to be investigated. It is shown that there may be a significant change in tidal amplitude at the coast of Northern Ireland. The bed stress in the Bristol Channel will be significantly reduced if a Severn barrage is constructed. Some effects on the tidal mixing are expected although the location of tidal fronts in the Irish and Celtic Seas will not be changed significantly. The largest environmental impact is expected to be on the amount of inter-tidal area retained after construction of an estuarine barrage. It is shown that the loss of mudflats can be substantially reduced by using a dual-mode (ebb and flood generation) scheme with an increased number of turbines over the lowest-cost option.

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“…Hodd (1977) and Gordon (1994) discussed impacts for the Bay of Fundy scheme. Baker (1991) and Matthews and Young (1992) review generic environmental impacts for tidal power schemes.…”

Section: Generic Impacts Of Tidal Power Schemesmentioning

confidence: 99%

Environmental impacts of tidal power schemes

Wolf

Walkington

Holt

et al. 2009

Proceedings of the Institution of Civil Engineers - Maritime En

View full text Add to dashboard Cite

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“…The applied intertidal sediments were previously collected from upper mudflats of the iBoF and had been air dried. The suspended sediment concentration applied corresponded to that naturally occurring in the iBoF (Gordon 1994), but decreased after the application with a half time of 1.8 hr.…”

Section: Experimental Protocolmentioning

confidence: 70%

The Between-Population Genetic Architecture of Growth, Maturation, and Plasticity in Atlantic Salmon

et al. 2014

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The between-population genetic architecture for growth and maturation has not been examined in detail for many animal species despite its central importance in understanding hybrid fitness. We studied the genetic architecture of population divergence in: (i) maturation probabilities at the same age; (ii) size at age and growth, while accounting for maturity status and sex; and (iii) growth plasticity in response to environmental factors, using divergent wild and domesticated Atlantic salmon (Salmo salar). Our work examined two populations and their multigenerational hybrids in a common experimental arrangement in which salinity and quantity of suspended sediments were manipulated to mimic naturally occurring environmental variation. Average specific growth rates across environments differed among crosses, maturity groups, and cross-by-maturity groups, but a growth-rate reduction in the presence of suspended sediments was equal for all groups. Our results revealed both additive and nonadditive outbreeding effects for size at age and for growth rates that differed with life stage, as well as the presence of different sex-and size-specific maturation probabilities between populations. The major implication of our work is that estimates of the genetic architecture of growth and maturation can be biased if one does not simultaneously account for temporal changes in growth and for different maturation probabilities between populations. Namely, these correlated traits interact differently within each population and between sexes and among generations, due to nonadditive effects and a level of independence in the genetic control for traits. Our results emphasize the challenges to investigating and predicting phenotypic changes resulting from between-population outbreeding. G ROWTH rate, the increase in body size per unit time, can vary substantially within and among populations. It can be directly or indirectly linked to fitness through lifehistory traits such as age at maturity or fecundity (Roff 1992;Stearns 2000). Rapid growth can increase survival probability and enable early reproduction but is usually traded off against later maturity with a higher fecundity (Lester et al. 2004). Furthermore, plasticity in growth can serve as a buffer for responding to environmental variation (Wright 1932;Schlichting and Pigliucci 1998). Consequently, the relationship between growth rate and age at maturity within wild populations might be shaped by local adaptation (Law 1979) or by anthropogenic selection and exploitation (Hutchings and Fraser 2008;Enberg et al. 2012).Intentional or unintentional anthropogenic translocations increase outbreeding among formerly isolated populations and can result in genotypic and phenotypic changes in local populations that affect individual fitness (Rhymer and Simberloff 1996;Allendorf et al. 2001). A common example is the escape of domesticated aquaculture fish into environments inhabited by their wild counterparts (Naylor et al. 2005;Morris et al. 2008). As with many other livestock sp...

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Influence of varying tidal prism on hydrodynamics and sedimentary processes in a hypertidal salt marsh creek

O’Laughlin

Proosdij

2012

Earth Surf Processes Landf

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Recent initiatives directing tidal power development in the Bay of Fundy have raised questions about far‐field environmental impacts related to energy extraction. It is understood that commercial scale tidal power installations in the Minas Passage will result in an overall decrease in tidal amplitude in the Minas Basin. Corresponding changes in sedimentation patterns may or may not be within the natural range of variability, and it is hypothesized that intertidal sedimentation rates will demonstrate a non‐linear response to modification of the tidal energy regime. This research considers acoustic Doppler velocimeter (ADV) and optical backscatter sensor (OBS) data from a sheltered tidal creek in the Minas Basin, for analysis of tidal characteristics in a hypertidal creek environment over spring and neap tidal cycles. Sediment deposition in the creek was also measured. Results show a first‐order control of topography on flow magnitude in the tidal creek, which impacts net sediment deposition through resuspension and removal of newly introduced material. This study demonstrates that tides which peak around the bankfull level show reduced early ebb stage turbulence and flow velocity and encourage an extended depositional period. The dynamics of marshfull tides may be responsible for the maximum sediment deposition in tidal creeks, providing large amounts of material that is eventually distributed to and deposited on marsh surfaces. Copyright © 2012 John Wiley & Sons, Ltd.

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Intertidal ecology and potential power impacts, Bay of Fundy, Canada

Cited by 18 publications

References 8 publications

Environmental impacts of tidal power schemes

Environmental impacts of tidal power schemes

The Between-Population Genetic Architecture of Growth, Maturation, and Plasticity in Atlantic Salmon

Influence of varying tidal prism on hydrodynamics and sedimentary processes in a hypertidal salt marsh creek

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