The competitive and predatory impacts of the nonindigenous crab Carcinus maenas (L.) on early benthic phase Dungeness crab Cancer magister Dana

McDonald, P. Sean; Jensen, Gregory C.; Armstrong, David A.

doi:10.1016/s0022-0981(00)00344-0

Cited by 121 publications

(66 citation statements)

References 46 publications

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“…The appearance of yet another invasive ctenophore (Beroe) Á that preyed on Mnemiopsis Á promoted recovery of the Black Sea ecosystem from effects of the Mnemiopsis invasion . Invasions may thus be regarded as ecological 'experiments' that could provide information on the structure (Crooks & Khim 1999) and resistance (Stachowicz et al 1999) of natural communities, or on perturbations caused by the sudden arrival of new species into the system (Lambert et al 1992;McDonald et al 2001;Walton et al 2002;Occhipinti-Ambrogi & Savini 2003;Branch & Steffani 2004).…”

Section: Introductionmentioning

confidence: 99%

Biology and interspecific interactions of the alien crabPercnon gibbesiin the Maltese Islands

Sciberras

Schembri

2008

Marine Biology Research

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Spatial and bathymetric distribution, population density, habitat preferences, fecundity, breeding season and interspecific interactions of the alien grapsoid crab Percnon gibbesi (H. Milne-Edwards, 1853) from the Maltese Islands (Malta and Gozo) are compared among localities in the Mediterranean where established populations have been reported since 1999. In the Maltese Islands, habitat preferences and bathymetric distribution were similar to those in other Mediterranean localities. Spatial distribution was found to be limited by the availability of the boulder habitat in which this crab nearly always occurs. Fecundity was higher in the Maltese Islands than in Linosa and Lampedusa, the breeding season lasting from the end of May until September. On Maltese shores the habitat of the alien overlapped with that of the native grapsid Pachygrapsus marmoratus (Fabricius, 1787) (Crustacea: Brachyura: Grapsoidea) and, to a lesser extent, that of the native xanthid Eriphia verrucosa (Forskål, 1775). Laboratory studies to assess the possible interactions of the alien species with P. marmoratus suggest that the latter shows a competitive advantage over P. gibbesi, since 80.8% of encounters between the two species were initiated by P. marmoratus, and in 80% of the encounters it prevailed. This suggests that P. marmoratus is unlikely to be excluded from its natural habitat by the alien species, and that significant spatial resource partitioning on the part of P. marmoratus is unlikely to occur.

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Section: Introductionmentioning

confidence: 99%

Biology and interspecific interactions of the alien crabPercnon gibbesiin the Maltese Islands

Sciberras

Schembri

2008

Marine Biology Research

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“…Eelgrass is an ecologically important species that provides habitat and shelter for wildlife (Dumbauld et al, 1993;McDonald et al, 2001), and thus modeling the position and distribution of eelgrass meadows around Sidney Spit was deemed important. These meadows have already been mapped through previous research efforts using remote sensing techniques (O'Neill et al, 2011), and maps from this work were used as reference maps for placing eelgrass within the geovisualization.…”

Section: Vegetationmentioning

confidence: 99%

“…Gull models were distributed throughout the geovisualization based on field observations, and animations were applied to these models to depict them as living animals (e.g., gulls turning heads, occasional foraging, and wing flapping). Dungeness crabs models were placed on the edges of eelgrass meadows to convey the reliance of the species on these meadows (Dumbauld et al, 1993;McDonald et al, 2001), and the models were animated in a manner that made it appear as if the animals were walking in and out of the meadows. Boat models were positioned off the western side of Sidney Spit in an area where mooring buoys have been placed by Parks Canada for the use of park visitors, and they were modeled in such a manner that captures both boats using the mooring buoys ( Figure 10A) and boats using their anchors 5 ( Figure 10B).…”

Section: Objectsmentioning

confidence: 99%

Modeling Both the Space and Place of Coastal Environments: Exploring an Approach for Developing Realistic Geovisualizations of Coastal Places

2017

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Effective coastal planning incorporates the variety of user needs, values, and interests associated with coastal environments. This requires understanding how people relate to coastal environments as "places," imbued with values and meanings, and accordingly, tools that can capture place and connect with people's "sense of place" have the potential for supporting effective coastal management strategies. Realistic, immersive geographical visualizations, i.e., geovisualizations, theoretically hold potential to serve such a role in coastal planning; however, significant research gaps exist around this application context. Firstly, place theory and geovisualizations are rarely explicitly linked in the same studies, leaving questions around how to model "coastal place," as well as coastal space. Secondly, geovisualization work has focused on terrestrial environments, and research on how to realistically model coastal places is currently in its infancy. The current study addresses the research gaps by developing a coastal geovisualization under place-based considerations, and then examining its capacity as a tool for connecting with people's sense of place. The research uses Sidney Spit in the Gulf Islands National Park Reserve (BC, Canada) as a study site, and a geovisualization was developed using a combination of ArcGIS, Adobe Photoshop, Trimble SketchUp, and Unity3D. Focus groups were assembled involving Parks Canada staff and Greater Victoria Area residents, and the geovisualization was assessed in terms of its representation of a real-world coastal place and ability for connecting with sense of place. Findings from the study indicate that the presence of certain elements in coastal geovisualizations can contribute to realism and sense of place, such as people, dogs, birds, marine life, vegetation, and boats; however, simultaneously, deficiencies in numbers and varieties of these elements can detract from realism and sense of place. In addition, incorporation of soundscape and viewshed elements both demonstrated as significant to the tool's ability to connect with sense of place, with the latter potentially being more significant among those with higher familiarity with the real-world place. Beach textures were also found to be important for the geovisualization's ability to connect with sense of place; however, this ability can be compromised when running versions of the tool with lower graphical resolution.

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“…Rainfall and subsequent outflow from rivers and streams can affect the salinity of estuarine water, as well as the suitability and use of the intertidal zone. While adult Carcinus frequently utilize subtidal habitats in other ranges, they are often found intertidally and restricted to estuaries along the eastern Pacific, likely due to predation by native Cancer crabs (McDonald et al 2001, Hunt & Behrens Yamada 2003; therefore, the environmental conditions of the inter-tidal zone are likely to be especially important in this region.…”

Section: Abstract: Invasion Effect · Nonindigenous Species · Carcinumentioning

confidence: 99%

Multiple and long-term effects of an introduced predatory crab

Rivera¹,

Grosholz²,

Ruiz³

2011

Mar. Ecol. Prog. Ser.

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The competitive and predatory impacts of the nonindigenous crab Carcinus maenas (L.) on early benthic phase Dungeness crab Cancer magister Dana

Cited by 121 publications

References 46 publications

Biology and interspecific interactions of the alien crabPercnon gibbesiin the Maltese Islands

Biology and interspecific interactions of the alien crabPercnon gibbesiin the Maltese Islands

Modeling Both the Space and Place of Coastal Environments: Exploring an Approach for Developing Realistic Geovisualizations of Coastal Places

Multiple and long-term effects of an introduced predatory crab

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