Characteristics and regional classification of the copepod community in Ariake Bay with note on comparison with 3 decades ago

Beltrão, Roberta; Monde, Michiko; Ueda, Hiroshi

doi:10.1007/s10872-011-0005-8

Cited by 5 publications

(3 citation statements)

References 12 publications

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“…It is recommended that experimental work be conducted in the future to support field results, e.g., on copepod physiological tolerance to SST rise in tropical waters ( Lehette et al, 2016 ), along with long-term monitoring of both zooplankton and environmental parameters. While many studies have reported shifts in copepod community structure over decades of anthropogenic perturbation, Beltrão, Monde & Ueda (2011) did not observe any significant change in community structure in a degraded coastal habitat (Ariake Bay). It has also been reported that power plant discharge did not alter zooplankton community structure in Brazil after 20 years of operation despite reaching a maximum temperature of 36.4°C ( Dias & Bonecker, 2008 ).…”

Section: Discussionmentioning

confidence: 59%

Response of marine copepods to a changing tropical environment: winners, losers and implications

Chew

Chong

2016

PeerJ

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Background. Climate change concurrent with anthropogenic disturbances can initiate serial changes that reverberate up the food chain with repercussions for fisheries. To date, there is no information available concerning the combined effects of global warming and human impacts on tropical marine food webs. While temperate copepods respond differently to warming and environmental stressors, the extent to which tropical copepods can adapt to rising temperature of already warm waters remains unknown. We hypothesize that sea warming and other anthropogenic disturbances over the long term will have the greatest impact on the copepod community in nearshore waters where their effects are accentuated, and therefore vulnerable and resilient species could be identified.Methods. Zooplankton samples were collected during two time periods (1985–86 and 2014–15) interposed by marked anthropogenic disturbances, and at the same five stations located progressively from inshore to offshore in Klang Strait, Malaysia, following the asymmetrical before-after-control-impact (BACI) design. Copepods were identified to species, and results were interpreted by univariate (ANOVA) and multivariate (PERMANOVA, PCO) analyses of the computed species abundance and diversity measures.Results. Copepod total abundance was not significantly different among stations but higher after disturbance than before disturbance. However, changes in the abundance of particular species and the community structure between time periods were dramatic. Coastal large-bodied calanoid species (e.g., Acartia spinicauda, Calanopia thompsoni, Pseudodiaptomus bowmani and Tortanus forcipatus) were the most vulnerable group to disturbance. This however favored the opportunistic species (e.g., Oithona simplex, O. attenuata, Hemicyclops sp., Pseudomacrochiron sp. and Microsetella norvegica). Small-bodied copepods (e.g., Paracalanus sp., Parvocalanus crassirostris and Euterpina acutifrons) were unaffected. Centropages tenuiremis was likely an introduced species. There was no significant loss in species richness of copepods despite the dramatic changes in community structure.Discussion. Sea warming and other human-induced effects such as eutrophication, acidification and coastal habitat degradation are likely the main factors that have altered copepod community structure. The large-bodied estuarine and coastal calanoid copepods are surmised to be vulnerable to eutrophication and hypoxia, while both resilient and opportunistic species are largely unaffected by, or adaptable to, degraded coastal environments and observed sea surface temperature (SST) rise. It is forecasted that SST rise with unmitigated anthropogenic impacts will further reduce large-bodied copepod species the favoured food for fish larvae with dire consequences for coastal fish production.

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Section: Discussionmentioning

confidence: 59%

Response of marine copepods to a changing tropical environment: winners, losers and implications

Chew

Chong

2016

PeerJ

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“…Since then, there has been sporadic research on copepod distribution and/or abundance in the bay (Hirota & Tanaka 1985, Hirota 1990, Okazaki et al 2005. The last one is by Beltrão et al (2011), investigating regional patterns of the copepod community in the bay and revealing that the community in the inner part was dominated by the small cyclopoid Oithona davisae Ferrari & Orsi, 1984. However, detailed seasonal and spatial distributions of the copepod community in the innermost part of the bay have not yet been studied.…”

Section: Introductionmentioning

confidence: 99%

Copepod community structure in the highly turbid innermost part of Ariake Bay in the 2000s with special reference to high abundances of <i>Oithona davisae</i>

Beltrão

Monde

Mine

et al. 2023

Plankton Benthos Res

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Ariake Bay has Japanʼs biggest nori seaweed farming field in the innermost part and has suffered from environmental degradation since the late 1990s. To elucidate the seasonal patterns in the copepod community structure in the inner bay, we examined monthly plankton-net samples collected in the top 2-m layer at 11 stations for 5 years from April 2002 to March 2007. Of the 11 stations, 7 were at the high-turbidity site (HTS) representing the nori farming field and 4 in the offshore low-turbidity site (LTS) for comparison. The copepod community in the HTS was dominated almost year round by Oithona davisae, whose 5-year mean abundance of 203 ind. L −1 comprised 84% of copepods and was more than double that in the LTS. O. davisae became extremely abundant in summer with the maximum monthly mean abundance in the HTS of 2756 ind. L −1 and the maximum sample-specific abundance of 10116 ind. L −1 . The following predominant copepods in the HTS were Parvocalanus crassirostris in summer-autumn, Microsetella norvegica in summer, Acartia omorii in spring, and Paracalanus parvus s.l. irregularly. Possible causes for high abundance of O. davisae in the HTS are assumed to be sufficient food resources, water temperature over 21°C, and a wide salinity tolerance range of the species.

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“…The genus Parvocalanus Andronov, 1970 contains six valid species (Boxshall and Halsey 2004). It is one of the major constituents of the calanoid assemblage of shallow waters worldwide (Robertson et al 1988; Beltrão et al 2011; Chen et al 2011). They are generally small-sized, varying from 0.5 to 1.5 mm in body length, and play an important role as primary consumers in marine ecosystems (Araujo 2006; Lenz 2012).…”

Section: Introductionmentioning

confidence: 99%

Description of Parvocalanus leei sp. n. (Copepoda, Calanoida, Paracalanidae) in Western Korea, with comments on the taxonomic position of Paracalanus arabiensis Kesarkar & Anil, 2010

Moon

Youn

Soh

2014

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A new species of paracalanid calanoid copepod Parvocalanus leei sp. n., is described from specimens collected in shallow waters of Western Korea. The new species is closely similar to Parvocalanus arabiensis (Kesarkar & Anil, 2010), Parvocalanus crassirostris (F. Dahl, 1894), Parvocalanus latus Andronov, 1972, and Parvocalanus scotti (Früchtl, 1923) in having two short terminal spines on the distal segment of the fifth leg and a similar rostrum in the female, but can be readily distinguished from its congeners by the body size, relative length of antennules, segmentation of endopod of leg 1, and pattern of ornamentation of spinules on legs 1 to 4 in the female. The taxonomic position of Parvocalanus arabiensis and the validity of the genus Parvocalanus Andronov, 1970 are also discussed.

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Characteristics and regional classification of the copepod community in Ariake Bay with note on comparison with 3 decades ago

Cited by 5 publications

References 12 publications

Response of marine copepods to a changing tropical environment: winners, losers and implications

Response of marine copepods to a changing tropical environment: winners, losers and implications

Copepod community structure in the highly turbid innermost part of Ariake Bay in the 2000s with special reference to high abundances of <i>Oithona davisae</i>

Description of Parvocalanus leei sp. n. (Copepoda, Calanoida, Paracalanidae) in Western Korea, with comments on the taxonomic position of Paracalanus arabiensis Kesarkar & Anil, 2010

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Characteristics and regional classification of the copepod community in Ariake Bay with note on comparison with 3 decades ago

Cited by 5 publications

References 12 publications

Response of marine copepods to a changing tropical environment: winners, losers and implications

Response of marine copepods to a changing tropical environment: winners, losers and implications

Copepod community structure in the highly turbid innermost part of Ariake Bay in the 2000s with special reference to high abundances of <i>Oithona davisae</i>

Description of Parvocalanus leei sp. n. (Copepoda, Calanoida, Paracalanidae) in Western Korea, with comments on the taxonomic position of Paracalanus arabiensis Kesarkar &amp; Anil, 2010

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Description of Parvocalanus leei sp. n. (Copepoda, Calanoida, Paracalanidae) in Western Korea, with comments on the taxonomic position of Paracalanus arabiensis Kesarkar & Anil, 2010