Interactive effects of shell hash and predator exclusion on 0-year class recruits of two infaunal intertidal bivalve species in Maine, USA

Beal, Brian F.; Coffin, Chad R.; Randall, Sara; Goodenow, Clint A.; Pepperman, Kyle E.; Ellis, Bennett W.

doi:10.1016/j.jembe.2020.151441

Cited by 11 publications

(8 citation statements)

References 88 publications

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“…These apparently contradictory findings provide a good example, as demonstrated in our study, of the site-specific nature of the efficacy of shell hash to mitigate low intertidal pH. Although sediment characteristics (i.e., % OM, grain size distribution) were not provided in Beal et al (2020), it is noted in their methods that sediment grain size varied between medium to very fine sand and were comprised of soft-bottom mudflats. Sediment characteristics for Casco Bay have been reported in Ramboll Environ.…”

Section: Discussionmentioning

confidence: 53%

“…In contrast to the findings of Jackley et al (2016) and Greiner et al (2018), Beal et al (2020) have reported that the addition of weathered shell hash to sediments within Caso Bay, ME, to offset corrosive conditions, had no positive effect on bivalves as measured by changes in density and size over a 3‐year period. Moreover, the addition of hash had no effect on porewater pH.…”

Section: Discussionmentioning

confidence: 75%

“…The authors attributed this finding to the addition of shell hash by ancient people, which remains on the landscape today. However, Beal et al (2020) studied the effects of shell hash on the recruits of two infaunal bivalve species and found that neither bivalve species responded positively to the presence of shell hash additions. Beal et al (2020) recommended that fishery managers should focus attention on mitigating effects due to predators rather than spreading shell hash to buffer intertidal sediments.…”

Section: Introductionmentioning

confidence: 99%

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An evaluation of the efficacy of shell hash for the mitigation of intertidal sediment acidification

Doyle

Bendell

2022

Ecosphere

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Our objectives were twofold: (1) to determine whether the addition of shell hash to intertidal sediments would mitigate porewater acidification and (2) whether its effectiveness was dependent on the type of sediment as described by organic matter (OM) and particle grain size (PGS). Field experiments were conducted at two sites within Burrard Inlet, British Columbia; Maplewood Mudflats (MM), high in OM and silt and Whey-ah-Wichen/Cates Park (WAW), low in OM and an equal PGS among very coarse, coarse, fine sand, and silt. Shell hash was added to triplicate treatment plots matched with triplicate controls at each site and porewater pH measured at flood and ebb tide over eight tidal cycles. Sampling occurred during June and July when tidal cycles were at their maximum inundation and exposure. Porewater pH was significantly greater for ebb versus flood tide and also between sites with MM significantly lower (7.59) as compared to WAW (8.03). Although pH was not mitigated by the shell hash, for WAW, variation in pH was reduced as compared to MM, as indicated by coefficients of variation over the 6-week sampling period. We suggest that the application of shell hash to reduce the impact of ocean acidification (OA) on intertidal sediments will be site dependent. The combined processes of eutrophication in sediments with high OM and respiration of infauna, especially at high densities, could act in concert with OA to create an intertidal region unsuitable for bivalve larvae settlement and development.

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Section: Discussionmentioning

confidence: 53%

Section: Discussionmentioning

confidence: 75%

Section: Introductionmentioning

confidence: 99%

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An evaluation of the efficacy of shell hash for the mitigation of intertidal sediment acidification

Doyle

Bendell

2022

Ecosphere

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“…For example, the application of very finely crushed shell hash could have a negative effect by decreasing interstitial spaces in the sediment and thus, as seen with silt, decreasing sediment permeability. Recent studies investigating the efficacy of shell hash to mitigate acidification of intertidal sediments found it unsuccessful at raising pore-water pH of acidic sediments (Beal et al 2020, Doyle and Bendell 2022). Doyle et al (2022) found the addition of shell hash to be site dependent as it reduced variation in pH at an intertidal site with pH 8.03 but did not mitigate the pH of mud flats with pH 7.59.…”

Section: Discussionmentioning

confidence: 99%

Effects of ancient anthropogenic clam gardens on the growth, survival, and transcriptome of Pacific littleneck clams (Leukoma staminea)

Raap

Gurney‐Smith

Dudas

et al. 2022

Preprint

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Clam gardens are habitat modifications established by coastal Indigenous Peoples of northwest North America to enhance intertidal clam habitat productivity to provide secure and reliable local food resources. These gardens were established long ago and are mostly unmaintained in present times. To determine whether unmaintained clam gardens still provide a more productive and beneficial habitat than unmodified clam beaches, Pacific littleneck clams (Leukoma staminea) were transplanted to unmaintained clam gardens or unmodified reference beaches and then evaluated for growth, survival, and transcriptomic signatures of the gill and digestive gland after 16 weeks. All beaches in the study were characterized for sediment grain-size distribution, carbonate concentration, and organic content to identify sediment characteristics that may differ between clam garden and reference sites, as well as potentially contribute to differences in clam productivity. Clam growth and survival, sediment grain-size distribution, and carbonate and organic content were not significantly affected by unmaintained clam gardens. Wide variations in survival, growth, and sediment characteristics were observed among beaches. Examining across beach location resulted in the identification of significant negative effects of small rocks (2.00 - 4.75 mm), and silt (< 63 μm) on both growth and survival. Sand (250 - 500 μm) had a significant positive influence on both growth and survival while fine sand (125 - 250 μm) had a significant positive effect only on growth. Coarse sand (0.50 - 1.00 mm) had a significant positive effect on survival, while very fine sand (63 - 125 μm), carbonate, and organic content all had significant negative effects. To evaluate transcriptomic effects, a de novo transcriptome for L. staminea was assembled. The final assembly contained 52,000 putative transcripts and those specific to each of the two tissues were identified. This revealed that similar functional categories were enriched in tissue-specific genes, but each tissue had its own transcripts comprising the categories. Transcriptomic analysis revealed differential expression in individuals from clam gardens, and although this effect was small in terms of the numbers of genes, specific response genes were identified consistently in both tissues. In summary, while the unmaintained clam gardens did not impact clam growth and survival over the 16 weeks of the study, it did have an effect at the level of the transcriptome. Furthermore, correlations of transcripts associated with either high or low survival provide new insights into ecological associations of these genes in this non-model organism. In summary, localized environmental factors are likely to have a greater influence on Pacific littleneck clam physiology, growth, and survival than the presence/absence of unmaintained clam gardens.

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“…A classe é representada pelos mexilhões, vieiras e ostras. São organismos marinhos, estuarinos e dulcícolas, com mais de 20.000 espécies viventes, podem ser organismos representantes da epifauna (organismo associado a substrato ou sedimentos) ou da infauna (organismo enterrado no sedimento) (BEAL et al, 2020).…”

Section: Classe Bivalvia Linnaeus 1758unclassified

Estado atual de conhecimento das principais características dos Moluscos / Current state of knowledge of the main characteristics of mollusks

Camargo¹,

Barreiros²,

Barbosa³

et al. 2021

BJDV

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RESUMOMollusca é um dos maiores Filos do Reino Animal, com uma estimativa de 240.000 espécies. O grupo apresenta enorme diversidade biológica, atrelada a ampla distribuição geográfica. Os representantes do Filo apresentam distintos nichos e relações tróficas. Algumas espécies são de interesse econômico e outras de saúde pública. Um exemplo é o Limnoperna fortunei Dunker, 1857, que condiciona prejuízo ambiental, social e econômico. Já o gênero Biomphalaria, hospedeiro intermediário de um trematódeo, causa problemas de saúde pública em muitos países. Atualmente, o Filo é representado por oito classes: Solenogastres ou Neomeniomorpha, Caudofoveata ou Chaetodermomorpha, Polyplacophora, Bivalvia, Monoplacophora, Scaphopoda, Gastropoda e Cephalopoda. Diante disso, o presente trabalho teve como objetivo realizar um trabalho de revisão do atual conhecimento das características do Filo Mollusca. Mesmo diante dessa diversidade e importância, algumas informações são escassas e pulverizadas na literatura.

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Interactive effects of shell hash and predator exclusion on 0-year class recruits of two infaunal intertidal bivalve species in Maine, USA

Cited by 11 publications

References 88 publications

An evaluation of the efficacy of shell hash for the mitigation of intertidal sediment acidification

An evaluation of the efficacy of shell hash for the mitigation of intertidal sediment acidification

Effects of ancient anthropogenic clam gardens on the growth, survival, and transcriptome of Pacific littleneck clams (Leukoma staminea)

Estado atual de conhecimento das principais características dos Moluscos / Current state of knowledge of the main characteristics of mollusks

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