Macrofaunal assemblages of benthic habitat of different complexity and the proposition of a model of biogenic reef habitat regeneration in Foveaux Strait, New Zealand

Cranfield, H. J.; Rowden, Ashley A.; Smith, Darren J.; Gordon, Dennis P.; Michael, K.P

doi:10.1016/j.seares.2003.12.003

Cited by 59 publications

(53 citation statements)

References 30 publications

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“…We further define persistence thresholds as those disturbance rates below which mature biogenic habitat is not retained in the model landscape. Rates of recovery after fishing disturbance have varied with distance from and size of neighboring patches (Cranfield et al 2003(Cranfield et al , 2004 suggesting that local dispersal between patches is important in determining patch recovery. Spatially-explicit dispersal is incorporated into the model by varying the size of the local neighborhood around disturbed cells from which colonists could be sourced.…”

Section: Methodsmentioning

confidence: 99%

“…We developed a general model of community dynamics based on observed recovery rates for a well-studied biogenic reef community, a New Zealand shallow (depth <100 m) bryozoan reef community (Cranfield et al 1999(Cranfield et al , 2003(Cranfield et al , 2004 (Table 1). Similar community dynamics and recovery rates occur for other biogenic reef communities, e.g.…”

Section: Methodsmentioning

confidence: 99%

“…The mature stage is defined by biogenic habitat attributes, and time to recovery from disturbance of this biogenic reef was estimated at 15 yr, at least in terms of the growth to reproductive stage of the habitat dominant species. Field observations show disturbed patches to typically progress through a series of successional stages of increasing habitat structure (Pearson & Rosenberg 1978, Rhoads et al 1978, Cranfield et al 2004, Zajac 2008 (Table 1, Fig. 1).…”

Section: Methodsmentioning

confidence: 99%

“…While the model is scale invariant, we conceptualize each grid cell to represent an area of 100 × 100 m, a realistic patch size for this biogenic reef community that historically has occupied 100s of km 2 (Cranfield et al 2003). While dispersal distances for species in this biogenic reef community have not been explicitly quantified, differences in recovery rates of disturbed patches separated from source reefs by distances of < 5 km suggest that dispersal in the range of 1 to 20 cells (100 m to 2 km) is a likely estimate for many of the dominant biogenic species (Cranfield et al 2003(Cranfield et al , 2004.…”

Section: Methodsmentioning

confidence: 99%

“…Here we create a model to develop a general framework for disturbance and recovery dynamics in marine landscapes. We parameterize our model to represent the complex mosaic of biogenic habitat types typically found in marine benthic ecosystems, using rates from a well-observed system (Cranfield et al 2003, Cranfield et al 2004. A previous model of marine benthic landscapes, conceptually adapted from a successional model of forest disturbance (Turner et al 1993), suggested temporal and spatial rates of disturbance at which benthic communities could persist, assuming no restrictions on colonist dispersal ).…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Interactions between disturbance and dispersal reduce persistence thresholds in a benthic community

Lundquist

Thrush²,

Coco³

et al. 2010

Mar. Ecol. Prog. Ser.

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Interactions between the scale of dispersal and the disturbance regime can lead to radical shifts in the ability of organisms to colonize patches and persist within a landscape. We varied the spatial and temporal rates of disturbance and the connectivity between patches in a model of a patch landscape to illustrate thresholds of community persistence for a marine benthic community. We used model parameters representative of a New Zealand marine biogenic-structured community for which recovery after the cessation of disturbance has been observed within ~15 yr. Model results suggest functional extinction of these biogenic communities under many disturbance regimes, and homogenization of the landscape to a community dominated by opportunistic species. Dispersal limitation increases in importance for recovery as the disturbance regime strengthens, indicating thresholds in the tolerable disturbance regime based on the dispersal potential of the dominant biogenic species. Limited sensitivity of our model results to different functional forms of the recovery trajectory and colonization neighborhood suggest that these results can be extrapolated to other biogenic structuredominated communities with recovery rates of a similar order of magnitude. Our results demonstrate that the scale of the disturbance regime and dispersal processes are fundamentally coupled, and knowing the scales of both processes is imperative when predicting change in the structure and diversity of benthic communities threatened by cumulative change.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Interactions between disturbance and dispersal reduce persistence thresholds in a benthic community

Lundquist

Thrush²,

Coco³

et al. 2010

Mar. Ecol. Prog. Ser.

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Capricious bioinvasions versus uncoordinated management strategies: how the most unlikely invaders can prosper under the current UK legislation framework

Morgan

Richardson

2011

Aquatic Conservation

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ABSTRACT1. Bioinvasions are known to be highly unpredictable and context-dependent, varying both spatially and temporally, particularly in areas of intense anthropogenic activity and disturbance. Even the most unlikely invader can rapidly become problematic in the absence of frequent, coherent, and flexible management strategies. Using the recent spread of the Chilean oyster (Ostrea chilensis Philippi 1845) within a designated Special Area of Conservation, the paper describes what can happen to seemingly innocuous non-native species under the often complicated and uncoordinated current UK legislation framework.2. Following >30 years of containment at Tal y Foel (North Wales, UK), O. chilensis, a species with a highly-reduced natural dispersal capacity, has now spread over a range of >30 km of shoreline. Alternative vectors, including rafting and several anthropogenic activities, are likely to have facilitated the dispersal of O. chilensis away from Tal y Foel.3. Areas of high oyster densities (maximum = 232 oysters m -2 ) have become established both close to and distant from the site of original introduction. The presence of all year classes throughout the observed age range (≤7 and ≤9 years old in the intertidal and subtidal populations, respectively) confirms regular annual recruitment in the area. Information is now urgently required regarding the factors that promote the persistence and spread of O. chilensis within its new environment, as well as the impacts of its increasing localized dominance on the native biodiversity and ecosystem function. 4. As well as providing valuable, up-to-date information on the recent spread of this non-native species, the paper highlights discrepancies in the current UK legislation framework that allow for the successful establishment and spread of even the most unlikely invaders. the formation of a comprehensive and dedicated EU legal framework for managing invasives is advocated that also promotes coherence and continuity with impending legislative instruments concerning other relevant sectors.

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Complex habitat generated by marine bryozoans: a review of its distribution, structure, diversity, threats and conservation

Wood

Probert

Rowden

et al. 2012

Aquatic Conservation

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1. Habitat-forming bryozoans are here defined as extant, heavily-calcified species which regularly attain sizes over 50 mm in three-dimensions and which contribute significantly to benthic habitat structure as living colonies.2. Records of habitat-forming bryozoans were collated and mapped, together with information about the location, environment, habitat-forming species, the nature and size of the habitat formed, any associated fauna, and relevant threats and/or conservation measures.3. Records collated here indicated that habitat-forming bryozoans occurred from~59 N to 77 S, but that they did not occur frequently in the tropics, being found most commonly in temperate continental shelf environments, on stable substrata in places where water movement was relatively fast and consistent.4. Habitat-forming bryozoans are particularly abundant and diverse in New Zealand, where 27 species, a quarter of which are cyclostomes, provide habitat over hundreds of square kilometres of sea floor. Other areas where they are particularly rich and/or abundant include Antarctica (Weddell, Lazarev and Ross Seas), the North Pacific around Japan, the northern Mediterranean and Adriatic, and along the southern edge of the North Sea, through the English Channel and around the United Kingdom.5. Large bryozoans provide habitat for diverse associated assemblages, particularly for other bryozoans, molluscs, annelids, arthropods, cnidarians, sponges, echinoderms and macroalgae.6. Protected areas which include habitat-forming bryozoans occur throughout the distribution of this frequently unrecognized habitat type, but despite this they are prone to damage by anthropogenic impacts including pollution and bottom fishing.

show abstract

Macrofaunal assemblages of benthic habitat of different complexity and the proposition of a model of biogenic reef habitat regeneration in Foveaux Strait, New Zealand

Cited by 59 publications

References 30 publications

Interactions between disturbance and dispersal reduce persistence thresholds in a benthic community

Interactions between disturbance and dispersal reduce persistence thresholds in a benthic community

Capricious bioinvasions versus uncoordinated management strategies: how the most unlikely invaders can prosper under the current UK legislation framework

Complex habitat generated by marine bryozoans: a review of its distribution, structure, diversity, threats and conservation

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