The spatial structure of local surficial sediment characteristics on Georges Bank, USA

Harris, Bradley P.; Stokesbury, Kevin D. E.

doi:10.1016/j.csr.2010.08.011

Cited by 38 publications

(33 citation statements)

References 33 publications

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“…Centimeter to meter scale descriptions of the structural complexity of the seabed have been shown to increase the fit of habitat models (Abookire et al 2007, Stoner et al 2007) and the predictive capability of several of our models might have increased if data describing bottom habitat heterogeneity at finer, ecologically relevant scales had been available for our study domain (e.g. Harris & Stokesbury 2010). Higher resolution bottom data might have improved our model for longfin inshore squid, which deposit egg masses on hard structures located on sand and muddy substrata (Jacobson 2005).…”

Section: Discussionmentioning

confidence: 99%

Ocean observatory data are useful for regional habitat modeling of species with different vertical habitat preferences

Manderson¹,

Palamara²,

Kohut³

et al. 2011

Mar. Ecol. Prog. Ser.

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Section: Discussionmentioning

confidence: 99%

Ocean observatory data are useful for regional habitat modeling of species with different vertical habitat preferences

Manderson¹,

Palamara²,

Kohut³

et al. 2011

Mar. Ecol. Prog. Ser.

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“…Since about 1980, the GB finfish community has gone through major changes related to fishing, large-scale species movement and climate change [14–17]. GB has a wide range of habitat types including sands, granules-pebbles, cobbles and boulders [18]. The effects of bottom trawling and dredging have been well documented showing declines in benthic productivity, species richness and increased homogenization [7,9].…”

Section: Introductionmentioning

confidence: 99%

Extinction Debt and Colonizer Credit on a Habitat Perturbed Fishing Bank

2016

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Temporal changes in occupancy of the Georges Bank (NE USA) fish and invertebrate community were examined and interpreted in the context of systems ecological theory of extinction debt (EDT). EDT posits that in a closed system with a mix of competitor and colonizer species and experiencing habitat fragmentation and loss, the competitor species will show a gradual decline in fitness (occupancy) eventually leading to their extinction (extirpation) over multiple generations. A corollary of this is a colonizer credit, where colonizer species occupancy may increase with fragmentation because the disturbance gives that life history a transient relative competitive advantage. We found that competitor species occupancy decreased in time concomitant with an increase in occupancy of colonizer species and this may be related to habitat fragmentation or loss owing to industrialized bottom trawl fishing. Mean species richness increased over time which suggests less specialization (decreased dominance) of the assemblage that may result from habitat homogenization. These analyses also showed that when abundance of species was decreased by fishing but eventually returned to previous levels, on average it had a lower occupancy than earlier in the series which could increase their vulnerability to depletion by fishing. Changing occupancy and diversity patterns of the community over time is consistent with EDT which can be exacerbated by direct impacts of fishery removals as well as climate change impacts on the fish community assemblage.

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“…While there was another 1.6-km survey done immediately after the 2000 opening in the NL (Stokesbury and Harris, 2006), as well as after the 2006 opening, a sample size of n = 2 fishing events is insufficient to test this hypothesis. Two, the NL contains much more sand, and is more temporally variable than the NE, which consists of coarser substrates (Harris and Stokesbury, 2010). Sea scallops are associated with sand-granule-pebble substrate in the NE and NL (Stokesbury, 2002), gravel-pebble substrate east of the NE on the Canadian side of the Hague Line (Thouzeau et al, 1991), and gravel substrate in Port Daniel Bay in the Gulf of St. Lawrence (Stokesbury and Himmelman, 1995).…”

Section: Discussionmentioning

confidence: 99%