Microhabitat differences in crab assemblage structures in a subtropical mangrove estuary on Iriomote Island, southern Japan

Kawaida, Shun; Nanjo, Kishio; Kanai, Takahiro; Kohno, Hiroyoshi; Sano, Mitsuhiko

doi:10.1007/s12562-017-1139-4

Cited by 15 publications

(4 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In mangrove sediments, several microbes and genes encoding enzymes have been identified to be involved in cellulose degradation, which can promote litter degradation [35]. In addition, endogenous enzymes in the digestive organs have been identified in a wide variety of invertebrates [34,36] including mangrove crabs [37][38][39]. Analysis of sesarmid mangrove crabs has shown that mangrove litter fragments dominate (often over 90%) in stomach contents, and stable isotope technique analysis supported that leaf litter is the main carbon source for sesarmid crabs [11,40,41].…”

Section: Introductionmentioning

confidence: 99%

Mangrove crab intestine and habitat sediment microbiomes cooperatively work on carbon and nitrogen cycling

et al. 2021

View full text Add to dashboard Cite

Mangrove ecosystems, where litter and organic components are degraded and converted into detrital materials, support rich coastal fisheries resources. Sesarmid (Grapsidae) crabs, which feed on mangrove litter, play a crucial role in material flow in carbon-rich and nitrogen-limited mangrove ecosystems; however, the process of assimilation and conversion into detritus has not been well studied. In this study, we performed microbiome analyses of intestinal bacteria from three species of mangrove crab and five sediment positions in the mud lobster mounds, including the crab burrow wall, to study the interactive roles of crabs and sediment in metabolism. Metagenome analysis revealed species-dependent intestinal profiles, especially in Neosarmatium smithi, while the sediment microbiome was similar in all positions, albeit with some regional dependency. The microbiome profiles of crab intestines and sediments were significantly different in the MDS analysis based on OTU similarity; however, 579 OTUs (about 70% of reads in the crab intestinal microbiome) were identical between the intestinal and sediment bacteria. In the phenotype prediction, cellulose degradation was observed in the crab intestine. Cellulase activity was detected in both crab intestine and sediment. This could be mainly ascribed to Demequinaceae, which was predominantly found in the crab intestines and burrow walls. Nitrogen fixation was also enriched in both the crab intestines and sediments, and was supported by the nitrogenase assay. Similar to earlier reports, sulfur-related families were highly enriched in the sediment, presumably degrading organic compounds as terminal electron acceptors under anaerobic conditions. These results suggest that mangrove crabs and habitat sediment both contribute to carbon and nitrogen cycling in the mangrove ecosystem via these two key reactions.

show abstract

Section: Introductionmentioning

confidence: 99%

Mangrove crab intestine and habitat sediment microbiomes cooperatively work on carbon and nitrogen cycling

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Sand, silt, and clay substrates are common soil formation that can be found in many types of forest e.g. : inland forest, island forest, and mangrove forest (Kawaida et al 2017;Lo et al 2019). The results of the substrate characteristic measurements at five research observations in Ngurah Rai Forest Park Bali showed that there were differences in the substrates texture (Table 2).…”

Section: Characteristics Of Substratesmentioning

confidence: 98%

The influence of physicochemical environment on the distribution and abundance of mangrove gastropods in Ngurah Rai Forest Park Bali, Indonesia

2020

View full text Add to dashboard Cite

Abstract. Imamsyah A, Arthana IW, Astarini IA. 2020. The influence of physicochemical environment on the distribution and abundance of mangrove gastropods in Ngurah Rai Forest Park Bali, Indonesia. Biodiversitas 21: 3178-3188. Ngurah Rai Forest Park is the widest mangrove ecosystem in Bali that close to the business center and tourism area. The strategic location of the Ngurah Rai Forest Park is estimated to produce anthropogenic waste that can disrupt the gastropod population and stability of the mangrove ecosystems. This study aims to analyze the mangrove density, distribution, and abundance of gastropods based on the quality of the biophysical environment. Mangrove data collection was carried out using a plot transect of 10 m x 10 m, 5 m x 5 m, and 1 m x 1 m. Meanwhile, samples gastropods were collected on a plot transect of 0.5 m x 0.5 m in plot transect of 5 m x 5 m. A total of 11 gastropods species and 6 mangrove species were recorded in this study. The dominant gastropods species found were Assiminea brevicula (28 ind/m2). Species mangrove of Sonneratia alba and Rhizophora apiculata found were in all study sites with tree density values of 1000 ind/ha. Subsequently, the ecological index calculation results show that the diversity index (H’) (2.89-3.2), evenness index (E) (0.87-0.93), and dominance index (C) (0.12-0.17). Based on the Principal Component Analysis (PCA) found was Assiminea brevicula spread on sand and silt substrates and adaptive to the temperature condition, salinity, pH, and dissolved oxygen. Furthermore, other analysis results showed that Cerithidea cingulata, Cerithidea quadrata, Littoraria articulata, and Littoraria scabra were found on clay substrate with high C-organic content. In conclusion, gastropods are evenly distributed and no species dominate the ecosystems.

show abstract

“…The species is the only mictyrid crab distributed on the islands (Davie et al, 2010). The crabs inhabit intertidal sand or muddy sand substrate of inner bays and estuaries and represent the dominant species in the estuarine crab community (Irie et al, 2005;Kawaida et al, 2017). Individuals of this species vary in body color from pale blue to a darker blue-gray to a dark ink-blue.…”

Section: Introductionmentioning

confidence: 99%

Seasonal changes in body color of <i>Mictyris guinotae</i> (Brachyura: Mictyridae)

et al. 2020

Self Cite

View full text Add to dashboard Cite

The body color of the soldier crab, Mictyris guinotae, varies from a pale blue to a dark ink-blue. We describe the composition of black and blue body color forms in animals obtained during a year-long collection effort. Body color showed clear seasonal changes; almost all crabs were black between April and September (non-breeding season) and blue between late November and February (breeding season). Larger black crabs, 7 mm in carapace length, first showed blue coloration in October, suggesting that color change is associated with sexual maturity. Some newly molted black individuals with white exuviae were found inside the burrow in March. The timing of the color change from blue to black was later in females because ovigerous females are unable to molt. Black body color during summer months may mitigate the harmful effects of ultraviolet radiation and provide visual crypsis from predators during activity on the surface of sand flats.

show abstract

Microhabitat differences in crab assemblage structures in a subtropical mangrove estuary on Iriomote Island, southern Japan

Cited by 15 publications

References 49 publications

Mangrove crab intestine and habitat sediment microbiomes cooperatively work on carbon and nitrogen cycling

Mangrove crab intestine and habitat sediment microbiomes cooperatively work on carbon and nitrogen cycling

The influence of physicochemical environment on the distribution and abundance of mangrove gastropods in Ngurah Rai Forest Park Bali, Indonesia

Seasonal changes in body color of <i>Mictyris guinotae</i> (Brachyura: Mictyridae)

Contact Info

Product

Resources

About