Copepod community structure and abundance in a tropical mangrove estuary, with comparisons to coastal waters

Chew, Li Lee; Chong, Ving Ching

doi:10.1007/s10750-010-0092-3

Cited by 73 publications

(34 citation statements)

References 34 publications

(46 reference statements)

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“…Only few studies examined the relationships between pH and copepod species. Similar to our results, Chew and Chong (2011) found negative relationship between pH and several estuarine Acartia species.…”

Section: Factors Controlling Zooplankton Communitysupporting

confidence: 92%

Spatiotemporal variations of zooplankton community in a shallow tropical brackish lagoon (Sontecomapan, Veracruz, Mexico)

et al. 2014

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Background: We studied the relationships between zooplankton distribution and environmental and trophic factors (abiotic variables, nutrients, bacterial biomass, and chlorophyll pigments) from three sampling surveys carried out during the three hydrological seasons (rainy, dry, and norte) in a tropical coastal lagoon connected to the sea. Results: Twenty eight (28) of the 54 taxa recorded were identified to species level, of which 3 genera of Cladocera were observed for the first time in the lagoon. Season-specific differences were highly significant. The overall zooplankton abundance was significantly higher during the dry season (157,000 ind.m −3 ) than those during the rainy and norte surveys (means of 11,600 and 16,700 ind.m −3 respectively). Copepoda (mostly nauplii) was the most abundant group (>83%) of total zooplankton abundance. Conclusions: Multivariate (coinertia) and multilinear regression analyses showed that transparency, salinity, temperature, pH, and food availability (Chl a, b, and c) were the main determinants of zooplankton abundance, composition, and diversity, explaining the seasonal differences. The relatively low zooplankton density in the lagoon compared to other eutrophic lagoons is attributed to the combined effects of high water exchanges, low depth, and high transparency, which favor instability and vulnerability to UV effects and/or to visual predation.

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Section: Factors Controlling Zooplankton Communitysupporting

confidence: 92%

Spatiotemporal variations of zooplankton community in a shallow tropical brackish lagoon (Sontecomapan, Veracruz, Mexico)

et al. 2014

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“…The here observed patterns of copepod diversity and density from the head towards the open coastal area is similar to what has been observed in other studies from tropical estuaries (Nguyen & Truong-Si 2006;Duggan et al 2008;Chew & Chong 2011).…”

Section: Discussionsupporting

confidence: 91%

Seasonal and spatial distribution of mesozooplankton in a tropical estuary, Nha Phu, South Central Viet Nam

et al. 2013

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This study provides a description of mesozooplankton (holo-and meroplankton) abundance, biomass and diversity patterns inside and outside a tropical estuary (Nha Phu Estuary, Khanh Hoa, Viet Nam). In total 185 zooplankton species have been recorded during the study period (2009)(2010), copepods contribute with the largest share of species (more than 100), Tunicata with 20, Cnidaria with 17 and Chaetognatha with 9 species. At the most species rich site the number of zooplankton species varies between 55 and 123. The number of species and the annual variation in numbers declines towards the head of the estuary (14-37 species). In contrast, the highest numbers of individuals occur in the inner part of NPE. Calanoids that are the most abundant group of the copepods occur in densities up to 28.2 ind. L −1 (Aug. 9). At 'Outer NPE' and 'Outside NPE' the maximum density of calanoids is 5.8 and 10.7 ind. L −1 , respectively. The declining diversity of zooplankton towards the head of the estuary is also supported by various indices (Shannon's index, Margalef's index). A cluster analysis on similarity of species supports a clustering of the inner NPE sites vs the other sites. There is a general separation between the dominant copepod species in the inner (Bestiola sp., Acartia pacifica, Pseudodiaptomus incisus) and outer (Paracalanus gracilis, Acrocalanus gibber, Subeucalanus subcrassus, Oithona rigida, Corycaeus andrewsi, Oithona plumifera) part of the estuary though a few species are common in both areas (Paracalanus crassirostris and Euterpina acutifrons). The zooplankton community at the inner NPE is subjected to more variable hydrographic conditions (salinity in particular) than the communities at the other sites where more stable conditions prevail. A short residence time in the inner part of the estuary due to the tide is supposed to impede a strong horizontal structuring of the zooplankton community.

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“…Given the dominance of copepods, which has been found to be 47% of the zooplankton assemblage in Matang estu aries (Chew & Chong 2011), and the present results, which show significant copepod consumption by young and small-sized fish, copepods must play an important role in mangrove trophodynamics. Chew & Chong (2011) reported that copepod abundance was highest at nearshore waters (20 311 ind.…”

Section: Feeding Competency and Habitssupporting

confidence: 64%

“…and mysids) which are planktonic at night. Although Acartia, Parvocalanus and Oithona species are predominant taxa in Matang mangrove estuaries (Chew & Chong 2011), Pseudodiaptomus annandalei, a demersal species that makes nocturnal migration into surface water (Kouassi et al 2001), was the preferred species ingested by most of the small fishes (77%) in the estuary. The next preferred food item (up to 60% of occurrence) was represented by the abundant hyperbenthic shrimps (particularly Acetes spp.).…”

mentioning

confidence: 99%

Phytoplankton fuel the energy flow from zooplankton to small nekton in turbid mangrove waters

Chew¹,

Chong²,

Tanaka³

et al. 2012

Mar. Ecol. Prog. Ser.

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Fish, zooplankton, seston, benthic microalgae and mangrove leaves were examined to investigate the trophic role of zooplankton in the food web of Matang estuaries. Despite the high turbidity and large amounts of detrital material in the water column, the study reveals that phytoplankton fuel the energy flow to zooplankton and small nekton in mangrove-fringed estuaries. The stable carbon isotope (δ 13 C) values and C/N ratios (7.2 to 8.2) of fine seston (< 63 µm) in estuaries indicate the importance of phytoplankton (δ 13 C: −22.8 ± 0.6 ‰) to zooplankton (−23.4 to −18.2 ‰) nutrition, with a trophic contribution of 70 to 84%, whereas mangroves contributed <11%. In adjacent coastal waters, zooplankton (−19.2 to −15.1 ‰) grazed on both phytoplankton and benthic diatoms (−17.3 ± 1.24 ‰). Aggregated or mucilage-secreting diatoms (giving depleted δ 13 C values) were abundant in the estuarine seston, but did not appear to be consumed or assimilated by zooplankton. Stomach content analysis showed significant consumption of zooplankton, especially copepods (mainly Pseudodiaptomus annandalei), sergestids (Acetes spp.) and mysids by young and small nekton (<14 cm standard length) in mangrove estuaries, while δ 13C values indicate the increasing importance of mangrove carbon to juvenile fish nutrition (8 to 44%). The range of δ 15 N values from primary producers to small predatory fish indicates 4 trophic levels (excluding true piscivores) in Matang estuaries, with zooplankton at the second and third trophic level. KEY WORDS: Stable isotopes · Stomach contents · Phytoplankton · Zooplankton · Nekton · Turbid mangrove watersResale or republication not permitted without written consent of the publisher Mar Ecol Prog Ser 469: 7-24, 2012 shrimps, constituted a large proportion of the diet of young juvenile and small-sized fishes (Chew et al. 2007, Then 2008, Tanaka et al. 2011.As mangrove detritus constitutes a large proportion of the organic matter in mangrove estuaries, there is a general perception that the estuarine food web is fueled by mangrove leaf carbon processed by both benthic micro-and macro-organisms (Odum & Heald 1975, Werry & Lee 2005. However, the trophic pathway from mangrove detritus to higher consumers (particularly fishes) has become a contentious issue based on the recent findings from stable isotope studies (e.g. Fleming et al. 1990, Marguillier et al. 1997, Bouillon et al. 2000. Indeed, alluded to phytoplankton and microphytobenthos providing substantially more energy than mangrove detritus to consumers in open mangrove waterways. Although several experimental and field observations have indicated ingestion and assimilation of vascular plant detritus by zooplankton (DeMott 1988, McKinnon & Klumpp 1998 and juvenile decapods (Newell et al. 1995, Dittel et al. 2000, Schwamborn et al. 2006, these studies also indicate that, given the choice, they would prefer live food.Senescent mangrove leaf litter may be unattractive as food to most animals because it is nutritionally poor (high C/N ratio), not...

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Copepod community structure and abundance in a tropical mangrove estuary, with comparisons to coastal waters

Cited by 73 publications

References 34 publications

Spatiotemporal variations of zooplankton community in a shallow tropical brackish lagoon (Sontecomapan, Veracruz, Mexico)

Spatiotemporal variations of zooplankton community in a shallow tropical brackish lagoon (Sontecomapan, Veracruz, Mexico)

Seasonal and spatial distribution of mesozooplankton in a tropical estuary, Nha Phu, South Central Viet Nam

Phytoplankton fuel the energy flow from zooplankton to small nekton in turbid mangrove waters

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