Influence of seawater temperature on growth bands, mineralogy and carbonate production in a bioconstructional bryozoan

Lombardi, Chiara; Cocito, Silvia; Hiscock, Keith; Occhipinti‐Ambrogi, Anna; Setti, Massimo; Taylor, Paul D.

doi:10.1007/s10347-008-0143-7

Cited by 41 publications

(38 citation statements)

References 33 publications

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“…Bryozoan skeletons refl ect a combination of organic and environmentally regulated processes (Lombardi et al 2008b ;Lowenstam and Weiner 1989 ;Smith and Key 2004 ;Smith et al 2006 ;Taylor et al 2008 ). Biomineral precipitation depends to varying degrees on environmental factors.…”

Section: Constructional Bryozoa In the Mediterranean Seamentioning

confidence: 99%

Bryozoan Constructions in a Changing Mediterranean Sea

Lombardi

Taylor

Cocito

2013

The Mediterranean Sea

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Bryozoans in the Mediterranean Sea are recognized as bioconstructional framework builders, both primary builders that construct frameworks alone or in combination with other organisms, or secondary builders that play various functional roles. Ten bryozoan species or complexes of species in the Mediterranean are responsible for providing habitats for diverse species and assemblages, thus playing important roles in promoting biodiversity and habitat heterogeneity. Four habitat-forming bryozoans respond to climatic changes (global warming and ocean acidifi cation) by altering their colony growth, zooidal morphology and development, skeletal mineralogy and geochemistry. Under conditions of reduced pH, these species reallocate energy resources within the colony by regulating zooid size, proportion of polymorphs, number of zooidal generations, colony growth rate, and investment in the organic components involved in biomineralizational processes. Mediterranean 'bryoconstructions' are suitable 'ecosystem models' to be monitored in the context of climate change, especially ocean acidifi cation and warming.

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Section: Constructional Bryozoa In the Mediterranean Seamentioning

confidence: 99%

Bryozoan Constructions in a Changing Mediterranean Sea

Lombardi

Taylor

Cocito

2013

The Mediterranean Sea

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“…Although there was little similarity among branches (owing perhaps to interbranch variation in growth rates), the oscillations were similar in scale to those observed in oxygen isotopes in the same species (Smith & Key 2004). With increased resolution it could be possible to align the branches so that internannual and seasonal variations are detectable (see, e.g., Lombardi et al 2008).…”

Section: Discussionmentioning

confidence: 99%

Within‐colony variation in skeletal mineralogy ofAdeonellopsissp. (Cheilostomata: Bryozoa) from New Zealand

Wejnert

Smith²

2008

New Zealand Journal of Marine and Freshwater Research

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Three colonies of the erect, robust branching, cheilostome bryozoan Adeonellopsis sp. were collected from Doubtful Sound, New Zealand, to investigate within-colony variation in carbonate mineralogy. One-hundred-and-twentyone sections from 9 branches were found to contain mostly aragonite, with calcite ranging from 1.1 to 7.3 wt% (mean ± SD = 2.4 ± 1.2 wt%, n = 120). The magnesium (Mg) content in calcite ranged from 5.3 to 13.1 wt% magnesium carbonate (8.8 ± 1.0 wt% MgCO 3 ; n = 120). Calcite content decreased with increasing age proximally along the branch, indicating that secondary thickening is achieved with aragonite. In contrast, an oscillating trend in Mg content along branches suggests that seasonal or interannual environmental parameters may influence this geochemical parameter. Mineralogical variability highlights the need for multiple samples from the same colony to be measured when determining quantitative carbonate mineralogy in bryozoans. Bimineralic bryozoans such as Adeonellopsis sp. may have lower preservation potential than monomineralic bryozoans, and consequently may not survive diagenesis to become fossils. Bimineralic species may also be more vulnerable to dissolution pressure and possible ocean acidification than monomineralic calcitic taxa.

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“…Magnesium in the form of magnesium carbonate (magnesite) is a common component of many marine invertebrates producing shells and skeletons of calcite, including echinoderms, corals, molluscs and bryozoans (e.g., Lowenstam and Weiner 1989;Ries 2004;Stolarski et al 2007;Lombardi et al 2008;Ries et al 2009;Taylor et al 2009). The solubility of calcite increases with increase in mol% MgCO 3 (e.g., Morse et al 2006;Andersson et al 2009), to the extent that calcite containing a high proportion of MgCO 3 is even more soluble than aragonite (e.g., Andersson et al 2009), the other common calcium carbonate biomineral which is generally regarded as being especially prone to dissolution.…”

Section: Introductionmentioning

confidence: 99%

Patterns of magnesium content in Arctic bryozoan skeletons along a depth gradient

2012

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A growing body of evidence suggests that ocean acidification acting synergistically with ocean warming alters carbonate biomineralization in a variety of marine biota. Magnesium often substitutes for Ca in the calcite skeletons of marine invertebrates, increasing their solubility. The spatioenvironmental distribution of Mg in marine invertebrates has seldom been studied, despite its importance for assessing vulnerabilities to ocean acidification. Because pH decreases with water depth, it is predicted that levels of Mg in calcite skeletons should also decrease to counteract dissolution. Such a pattern has been suggested by evidence from echinoderms. Data on magnesium content and depth in Arctic bryozoans (52 species, 103 individuals, 150 samples) are here used to test this prediction, aided by comparison with six conceptual models explaining all possible scenarios. Analyses were based on a uniform dataset spanning more than 200 m of coastal water depth. No significant relationship was found between depth and Mg content; indeed, the highest Mg content among the analyzed taxa (8.7 % mol MgCO 3 ) was recorded from the deepest settings ([200 m). Our findings contrast with previously published results from echinoderms in which Mg was found to decrease with depth. The bryozoan results suggest that ocean acidification may have less impact on the studied bryozoans than is generally assumed. In the broad context, our study exemplifies quantitative testing of spatial patterns of skeletal geochemistry for predicting the biological effects of environmental change in the oceans.

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Influence of seawater temperature on growth bands, mineralogy and carbonate production in a bioconstructional bryozoan

Cited by 41 publications

References 33 publications

Bryozoan Constructions in a Changing Mediterranean Sea

Bryozoan Constructions in a Changing Mediterranean Sea

Within‐colony variation in skeletal mineralogy ofAdeonellopsissp. (Cheilostomata: Bryozoa) from New Zealand

Patterns of magnesium content in Arctic bryozoan skeletons along a depth gradient

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