Soil Accretionary Dynamics, Sea-Level Rise and the Survival of Wetlands in Venice Lagoon: A Field and Modelling Approach

Day, John W.; Rybczyk, John; Scarton, Francesco; Rismondo, Andrea; Are, Daniele; Cecconi, Giovanni Alberto

doi:10.1006/ecss.1999.0522

Cited by 167 publications

(98 citation statements)

References 30 publications

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“…Despite only being represented by relatively small colonies, their (1978/83, Occhipinti-Ambrogi 19851988/89, OcchipintiAmbrogi 19911993/94 and 1996/97, Occhipinti-Ambrogi 2000b2001, present study presence can be interpreted as one of the results of an ongoing marinization process of the Venice Lagoon, also suggested by other authors (Day et al 1999;Carbognin & Tosi 2002;Sconfietti et al 2003). The invasion process, in addition to the increased marine characteristics of the Venice ecosystem, might have caused unfavourable conditions for some native species, typical of lagoon environments, that have been progressively replaced by opportunistic marine species.…”

Section: Discussionsupporting

confidence: 82%

“…These alterations of the lagoon environment must be added to the rising sea level (Day et al 1999;Carbognin & Tosi 2002), with higher frequency and intensity of 'high water' events (Ravera 2000). The increased internal hydrodynamics, which in turn triggered the lagoon floor erosion (Carbognin & Tosi 2002), the disappearance of marshes and the reduction of river inputs (Day et al 1999) also led to a general marinization of the lagoon.…”

Section: Introductionmentioning

confidence: 99%

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Porifera and Bryozoa on artificial hard bottoms in the Venice Lagoon: Spatial distribution and temporal changes in the northern basin

Corriero

Longo

Mercurio

et al. 2007

Italian Journal of Zoology

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The spatial distribution and temporal changes of demosponges and bryozoans in the northern basin of the Venice Lagoon were studied from samples collected from wooden piles and artificial rocks in June and October 2001. Twenty species of demosponges and 18 species of bryozoans were recorded. Sponges were found at 10 out of 11 sampling stations, while bryozoans were found at all 11 sampling stations. The studied taxocoenoses showed a high percentage cover of the lagoon hard bottoms. Eleven out of the 20 detected species of sponges were reported in a previous study on this taxocoenosis carried out on material collected in 1954-1955. Moreover, the most abundant species were also recorded during a study in 1989. These observations suggest a remarkable degree of persistence of the sponge community. Among bryozoans, the comparison with literature data showed a wider variation in species composition, with the occurrence of five new species in the studied area. The Indo-Pacific invasive Tricellaria inopinata replaced the native Bugula spp. in the role of dominant species. Finally, a significant increase in species richness along the salinity gradient, more evident for sponges than for bryozoans, was identified.

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Section: Discussionsupporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Porifera and Bryozoa on artificial hard bottoms in the Venice Lagoon: Spatial distribution and temporal changes in the northern basin

Corriero

Longo

Mercurio

et al. 2007

Italian Journal of Zoology

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“…Severn Estuary, UK (Allen, 1990); North Norfolk coast, UK; Hut Marsh, Scolt Head Island (French, 1993); Venice Lagoon (Day et al, 1999); and wetlands of Louisiana, USA (Koch et al, 1990). Useful as these analyses are in defining the envelope of response, they only give a one-dimensional view of wetland-sea-level rise relations.…”

Section: Broad-scale Modelling Of Wetland Behaviourmentioning

confidence: 99%

Broad-scale modelling of coastal wetlands: what is required?

2007

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A Wetland Change Model has been developed to identify the vulnerability of coastal wetlands at broad spatial (regional to global (mean spatial resolution of 85 km)) and temporal scales (modelling period of 100 years). The model provides a dynamic and integrated assessment of wetland loss, and a means of estimating the transitions between different vegetated wetland types and open water under a range of scenarios of sea-level rise and changes in accommodation space from human intervention. This paper is an overview of key issues raised in the process of quantifying broad-scale vulnerabilities of coastal wetlands to forcing from sea-level rise discussing controlling factors of tidal range, sediment availability and accommodation space, identification of response lags and defining the threshold for wetland loss and transition.

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“…Rybczyk et al (1998) extended the Callaway et al (1996) approach to simulate elevation changes as affected by sea level rise in a forested wetland in the southeastern United States. Rybczyk and Cahoon (2002) and Day et al (1999) used a similar approach to simulate effects of sea level rise on marsh accretion in Louisiana and the Venice Lagoon. Most recently, Swanson et al (2013) used a modified version of the Callaway et al (1996) model to evaluate changes in marsh surface elevation and the impact of these elevation changes on marsh habitat for specific species of concern.…”

Section: Introductionmentioning

confidence: 99%

Impounded Marshes on Subsided Islands: Simulated Vertical Accretion, Processes, and Effects, Sacramento-San Joaquin Delta, CA USA

Deverel¹,

Ingrum²,

Lucero³

et al. 2014

SFEWS

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There is substantial interest in stopping and reversing the effects of subsidence in the Sacramento-San Joaquin Delta (Delta) where organic soils predominate. Also, the passage of California Assembly Bill 32 in 2006 created the potential to trade credits for carbon sequestered in wetlands on subsided Delta islands. The primary purpose of the work described here was to estimate future vertical accretion and understand processes that affect vertical accretion and carbon sequestration in impounded marshes on subsided Delta islands. Using a cohort-accounting model, we simulated vertical accretion from 4,700 calibrated years before present (BP) at a wetland area located within Franks Tract State Recreation Area (lat 38.059, long −121.611, hereafter, "Franks Wetland")-a small, relatively undisturbed marsh island-and at the Twitchell Island subsidencereversal demonstration project since 1997. We used physical and chemical data collected during the study as well as literature values for model inputs. Model results compared favorably with measured rates of vertical accretion, mass of carbon sequestered, bulk density and organic matter content.From 4,700 to model-estimated 350 years BP, the simulated rate of vertical accretion at Franks Wetland averaged about 0.12 cm yr -1 , which is within the range of rates in tidal wetlands worldwide. Our model results indicate that large sediment inputs during the last 150 to 200 years resulted in a higher accretion rate of 0.3 cm yr -1 . On Twitchell Island, greater organic inputs resulted in average vertical accretion rates as high as 9.2 cm yr -1 . Future simulations indicate that the managed impounded marsh will accrete highly organic material at rates of about 3 cm yr -1 . Model results coupled with GIS analysis indicate that large areas of the periphery of the Delta, if impounded and converted to freshwater marsh, could be restored to tidal elevations within 50 to 100 years. Most of the central Delta would require 50 to 250 years to be restored to projected mean sea level. A large portion of the western Delta could be restored to mean sea level within 50 to 150 years (large areas on Sherman, Jersey, and Bethel islands, and small areas on Bradford, Twitchell, and Brannan islands, and Webb Tract). We estimated that long-term carbon sequestration rates for impounded marshes such as the Twitchell Island demonstration ponds will range from 12 to 15 metric tons carbon ha -1 yr -1 . Creation of impounded marshes on Delta islands can substantially benefit levee stability as demonstrated by cumulative force and hydraulic gradient calculations.1 HydroFocus, Inc., Davis, CA USA 2 U.S. Geological Survey, California Water Science Center Sacramento, CA USA * Corresponding author: sdeverel@hydrofocus.com SAN FRANCISCO ESTUARY & WATERSHED SCIENCE 2 INTRODUCTIONThe 300,000-ha Sacramento-San Joaquin Delta is a critical natural resource, important agricultural region and the hub for California's water supply. Within an area of about 81,000 ha in the central Delta, an estimated 4.5 billion ...

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Soil Accretionary Dynamics, Sea-Level Rise and the Survival of Wetlands in Venice Lagoon: A Field and Modelling Approach

Cited by 167 publications

References 30 publications

Porifera and Bryozoa on artificial hard bottoms in the Venice Lagoon: Spatial distribution and temporal changes in the northern basin

Porifera and Bryozoa on artificial hard bottoms in the Venice Lagoon: Spatial distribution and temporal changes in the northern basin

Broad-scale modelling of coastal wetlands: what is required?

Impounded Marshes on Subsided Islands: Simulated Vertical Accretion, Processes, and Effects, Sacramento-San Joaquin Delta, CA USA

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