Consumption of terrestrial organic matter by estuarine molluscs determined by analysis of their stable isotopes and cellulase activity

Antonio, Emily S.; Kasai, Atsushi; Ueno, Masahiro; Kurikawa, Yoshiro; Tsuchiya, Kanako; Toyohara, Haruhiko; Ishihi, Yuka; Yokoyama, Hisashi; Yamashita, Yoh

doi:10.1016/j.ecss.2009.05.010

Cited by 59 publications

(27 citation statements)

References 44 publications

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“…In particularly, endogenous cellulase genes have been cloned from a common Japanese brackish water clam, Corbicula japonica (Sakamoto et al 2007), abalone (Suzuki et al 2003), and mussel (Xu et al 2001), proving direct digestion of cellulose by those aquatic invertebrates. Three species of estuarine gastropods were also reported to have cellulase activity (Antonio et al 2010). It is very likely that the presence of a digestive enzyme will be confirmed from L. decorata in the near future.…”

Section: Discussionmentioning

confidence: 99%

Possibility of direct utilization of seagrass and algae as main food resources by small gastropod, Lacuna decorata, in a subarctic lagoon, Hichirippu, eastern Hokkaido, Japan with stable isotope evidences of carbon and nitrogen

Kajihara

Komorita

Hamada

et al. 2010

Plankton Benthos Res

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Abstract:The small gastropod, Lacuna decorata Adams, living on macrophytobenthos or surface sediment, is one of the most dominant species of macrozoobenthos in Hichirippu lagoon covered with seagrass and macroalgae, eastern Hokkaido, Japan. We measured the standing stocks of primary producers and macrozoobenthos, and determined the stable carbon and nitrogen isotope ratios of the primary producers and L. decorata. With these results, we identify the main food items for L. decorata and discuss the feeding strategy of the small gastropod. This gastropod occupied about 64% in density and about 25% in biomass of the macrozoobenthos at all six sampling stations in the lagoon. It occurred densely on the surface of the sediment with dense patches of benthic microalgae (BMA), which contained extremely high levels of Chl.-a between 84 to 226 mg m Ϫ2 throughout the period of this study. Nevertheless, the stable isotope signatures of carbon and nitrogen of this gastropod clearly show the direct utilization of organic matter derived from seagrass, Zostera japonica, in the areas where the seagrass luxuriated. However, it shows also a flexible feeding strategy in food preference. It fed green algae such as Ulva pertusa and Urospora wormskioldii in the areas where the seagrass grew scarcely.Key words: food resource, gastropod, green algae, Lacuna decorata, lagoon, seagrass, stable isotope, Zostera japonica * Corresponding author: Rumiko Kajihara; E-mail, rmk-kjhr@ees.hokudai.ac.jpThe description of feeding activities of the dominant species in the macrobenthic communities is important to follow the material or energy transportation from the primary producers to the primary consumers (the secondary producers) in the benthic ecosystem. However, it is often not easy to observe the feeding activities of small macrobenthic animals such as L. decorata and to identify their main food items by direct observation of feeding behaviors. For the description of food chain in the marine ecosystem, the techniques of stable isotope analysis have become popular recently, since the accumulation of empirical results on the carbon and nitrogen stable isotope ratios (d 13 C and d 15 N) has revealed that each primary producer, such as phytoplankton, benthic microalgae, seagrass and macroalgae, has a unique range of the stable carbon isotope ratios (Fry & Sherr 1984, France 1995, animals have a slightly enriched carbon stable isotope ratio (0.8Ϯ1.1‰, d13 C) to those of their main food items, and the enrichment of nitrogen stable isotope ratio between two different trophic levels in the food chain is relatively constant (d 15 N: 3.4Ϯ1.1‰) (DeNiro & Epstein 1978, Minagawa & Wada 1984. The determination of carbon and nitrogen isotope ratios of the small gastropod, L. decorata, also seems to be helpful for identification of main food items, particularly because it occurs in the two different habitats on the sediment of the sea floor and on the leaves of seagrass or the thalli of macroalgae.We have studied the structure of lagoon ecosystems in eastern Ho...

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Section: Discussionmentioning

confidence: 99%

Possibility of direct utilization of seagrass and algae as main food resources by small gastropod, Lacuna decorata, in a subarctic lagoon, Hichirippu, eastern Hokkaido, Japan with stable isotope evidences of carbon and nitrogen

Kajihara

Komorita

Hamada

et al. 2010

Plankton Benthos Res

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“…Reproductive events of snails in brackish wetlands, on the other hand, usually concur with greater loads of organic matter (Antonio et al, 2010;Naranjo-García, 2003;NaranjoGarcía & Meza-Meneses, 2000). In our study system this occurred during the rainy season, when the rivers that discharge their waters in the lagoon increase their flows and, consequently, the inputs of organic matter that comes from the surrounding terrestrial ecosystems.…”

Section: Discussionmentioning

confidence: 99%

Changes in body size spectra of benthic caridean shrimps (Decapoda: Caridea) and snails (Gastropoda) as response to seasonal variability

Badano

Labra

Martínez‐Pérez

et al. 2016

RBT

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Abstract:Ecologists have been largely interested in the description and understanding of the power scaling relationships between body size and abundance of organisms. Many studies have focused on estimating the exponents of these functions across taxonomic groups and spatial scales, to draw inferences about the processes underlying this pattern. The exponents of these functions usually approximate -3/4 at geographical scales, but they deviate from this value when smaller spatial extensions are considered. This has led to propose that body size-abundance relationships at small spatial scales may reflect the impact of environmental changes. This study tests this hypothesis by examining body size spectra of benthic shrimps (Decapoda: Caridea) and snails (Gastropoda) in the Tamiahua lagoon, a brackish body water located in the Eastern coast of Mexico. We measured water quality parameters (dissolved oxygen, salinity, pH, water temperature, sediment organic matter and chemical oxygen demand) and sampled benthic macrofauna during three different climatic conditions of the year (cold, dry and rainy season). Given the small size of most individuals in the benthic macrofaunal samples, we used body volume, instead of weight, to estimate their body size. Body size-abundance relationships of both taxonomic groups were described by tabulating data from each season into base-2 logarithmic body size bins. In both taxonomic groups, observed frequencies per body size class in each season were standardized to yield densities (i.e., individuals/m 3 ). Nonlinear regression analyses were separately performed for each taxonomic group at each season to assess whether body size spectra followed power scaling functions. Additionally, for each taxonomic group, multiple regression analyses were used to determine whether these relationships varied among seasons. Our results indicated that, while body size-abundance relationships in both taxonomic groups followed power functions, the parameters defining the shape of these relationships varied among seasons. These variations in the parameters of the body size-abundance relationships seems to be related to changes in the abundance of individuals within the different body size classes, which seems to follow the seasonal changes that occur in the environmental conditions of the lagoon. Thus, we propose that these body size-abundance relationships are influenced by the frequency and intensity of environmental changes affecting this ecosystem. Rev. Biol. Trop. 64 (1): 33-44. Epub 2016 March 01.

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“…Clithon retropictus is known to feed on epilithic microalgae (Antonio et al 2010), the high density of snails on stones being due to the abundant epilithic microalgae growing on the stone surfaces (Ohara & Tomiyama 2000). The shelter from desiccation provided by stones is seen in the spatial distribution of C. retropictus being closely related to water presence, more snails occurring beneath exposed stones than under submerged ones.…”

Section: Discussionmentioning

confidence: 99%

Spatial distribution in relation to life history in the neritid gastropod <i>Clithon retropictus </i>in the Kanzaki River Estuary, Osaka, Japan

Miyajima

Wãda

2014

Plankton Benthos Res

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Population structure, growth, reproductive activities and spatial distribution in a population of the neritid gastropod Clithon retropictus are described, and the effects of habitat stones on distribution and individual activities are investigated. Monthly changes in coupling behavior and abundance of egg capsules indicated that the main reproductive season is June. The occurrence of small juveniles indicated that recruitment occurred mainly between August and September in the lower intertidal region of the adult distribution range. Recruits grew to a large size (ca. 9 mm SL), reaching maturity in June of the second year (ca. 1 year old). Longevity was estimated to be at least 3.3 years. More than 90% of snails occurred on stones throughout the year, predominantly underneath stones on exposed substratum rather than those on submerged substratum. Snail abundance was significantly influenced by stone coverage, water condition and time of year (month). Stone manipulation revealed a positive relationship between snail abundance and stone abundance. Mating behavior occurred mainly on the upper or lateral surface of stones. The occupancy periods of individual snails on stones were positively correlated with stone size in autumn, but not in the other three seasons. Distances moved by individual snails per day were significantly shorter in winter than in the other seasons.

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Consumption of terrestrial organic matter by estuarine molluscs determined by analysis of their stable isotopes and cellulase activity

Cited by 59 publications

References 44 publications

Possibility of direct utilization of seagrass and algae as main food resources by small gastropod, Lacuna decorata, in a subarctic lagoon, Hichirippu, eastern Hokkaido, Japan with stable isotope evidences of carbon and nitrogen

Possibility of direct utilization of seagrass and algae as main food resources by small gastropod, Lacuna decorata, in a subarctic lagoon, Hichirippu, eastern Hokkaido, Japan with stable isotope evidences of carbon and nitrogen

Changes in body size spectra of benthic caridean shrimps (Decapoda: Caridea) and snails (Gastropoda) as response to seasonal variability

Spatial distribution in relation to life history in the neritid gastropod <i>Clithon retropictus </i>in the Kanzaki River Estuary, Osaka, Japan

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