Potential roles of biotic factors in regulating zooplankton community dynamics in jakarta bay shallow water coastal ecosystem
01 Jul 2012-Vol. 4, Iss: 1
TL;DR: In this article, the authors examined the relationship between zooplankton community dynamic and important biotic factors, such as predation and food availability, in Jakarta bay, from July to November 2009.
Abstract: The dynamics in zooplankton abundance were regulated by changes in water physical-chemical parameters and interaction with biotic factors. In this research we examined the relationship between zooplankton community dynamic and important biotic factors, such as predation and food availability, in Jakarta bay. Plankton samplings were done in 10 sampling stations in Jakarta bay, from July to November 2009. Zooplankton samples were collected using horizontal towing method with NORPAC plankton net (mesh size 300 μm). Salinity, water depth, water temperature, and water transparency were measured. Phytoplankton samples were also collected with the same method as zooplankton, using Kitahara plankton net (mesh size 80 μm). Zooplankton taxas were grouped into two groups, the prey and predatory zooplankton. The results showed that there were two different patterns in zooplankton groups dynamic i.e., the single and double peak. The abundance peak in most zooplankton groups, such as copepods, cirripeds, luciferids, and tunicates, were induced by the high food availability during the phytoplankton bloom in August. The high abundance of prey zooplankton groups in August was responded by the predatory zooplankton groups, resulting in high abundance of predatory zooplankton in adjacent month. The high abundance of ctenophores and chordates (fish larvae) were suggested as the main factor for the low abundance of other zooplankton in September. Physical and chemical factors were not the regulating factors due to the stability of those factors during this research period. Thus we concluded that food availability and predator-prey interaction were the main factors which regulate zooplankton community dynamics in Jakarta bay. Keywords: predator-prey interaction, zooplankton, abundance peak, food availability, phytoplankton bloom
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01 Jan 1975
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Journal Article•
TL;DR: The relationship of physicochemical paramaters of the water and the composition, diversity and abundance of zooplankton assemblage in the nearshore waters surrounding Iligan City were investigated.
Abstract: The relationship of physicochemical paramaters of the water and the composition, diversity and abundance of zooplankton assemblage in the nearshore waters surrounding Iligan City were investigated. Hydrological parameters assessed in the waters revealed values that are within the standard set by the Philippines Department of Natural Resources for marine fauna and flora to thrive and be abundant. Rich composition of mesozooplankton was observed with a total of 103 zooplankton comprising the community. Among these zooplankton, copepods were the most numerous group with Canthocalanus pauper, Paracalanus parvus, Oncaea venusta, Acartia erythraea and Oncaea media being the most dominant species in all sampling stations. In terms of copepod diversity profile, relatively high Shannon index (H’: 3.1-3.5) were noted implying that the area is teeming with diverse species of copepods. Although copepods were the most common zooplankton in the area, other groups, namely the protochordates, chaetognaths and chordates (fish eggs and fish larvae) were also abundant. Results of the Canonical Correspondence Analysis (CCA) revealed that water motion may be responsible to the high abundance and diversity of the copepods since this factor can lead to the mixing and transport of more copepods into the area. Hence, the high abundance of these certain groups of zooplankton may imply the high potential of the areas to be used as nursery ground for fish and other macroinvertebrates thereby further supporting the importance of maintaining the marine sanctuary already established in the area.
2 citations
Cites background from "Potential roles of biotic factors i..."
...…factors like different seasons (Yoshida et al 2006), diel vertical migration (Lo et al 2004), time and day of sampling (Hwang et al 2009), size of mesh openings of the net used (Tseng et al 2011) and biotic parameters (i.e. prey-predators, Rachman & Fitriya 2012) may influence these community....
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References
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TL;DR: The trophic role of gelatinous zooplankton as predators in Tokyo Bay is important all the year round, considering the high impact of A. aurita from spring to summer and B. mikado from autumn to winter.
Abstract: The abundance of a scyphomedusae, Aurelia aurita and Chrysaora melanaster, and a ctenophore, Bolinopsis mikado, in Tokyo Bay was investigated from 1995 to 1997. Aurelia aurita appeared throughout the year with a peak in abundance occurring from spring to summer. The average abundance and biomass during this period for the three successive years was 4.8, 43.8 and 3.2 ind. m−2, and 1.02, 10.0 and 0.42 gC m−2, respectively. The values in 1995 and 1997 were comparable with those previously reported for A. aurita abundance from 1990 to 1992. Values were very high in 1996, but the size composition of the bell diameter did not differ from other years, which suggested the absence of food limitation for A. aurita in 1996. C. melanaster was scarce over the survey period (<1.0 ind. m−2) while Bolinopsis mikado was more abundant during September to December, with maximum values of 172 ind. m−2 and 0.33 gC m−2 observed in December 1997. The weight-specific clearance rate for A. aurita on zooplankton (mainly copepods and their nauplii) was 0.16 ± 0.05 lgWW−1 h−1 (n = 13). Population clearance rate peaked from spring to summer, with average levels of 14.2%, 162% and 5.0% day−1 obtained from spring to summer for respective years. Population clearance rates for B. mikado, calculated based on minimum carbon requirements, was 7.1% day−1 in December 1997. Consequently, the trophic role of gelatinous zooplankton as predators in Tokyo Bay is important all the year round, considering the high impact of A. aurita from spring to summer and B. mikado from autumn to winter.
29 citations
TL;DR: The amount of food required to support the zooplankton secondary production corresponded to 18% of the phytoplankon primary production or only 1.7% ofThe grazing impact of herbivorous zoopLankton was minor in Ise Bay in winter, demonstrating that the grazing impact in this eutrophic embayment in winter was minor.
Abstract: We investigated the geographical variations in abundance and biomass of the major taxonomic groups of micro- and net-zooplankton along a transect through Ise Bay, central Japan, and neighboring Pacific Ocean in February 1995. The results were used to estimate their secondary and tertiary production rates and assess their trophic roles in this eutrophic embayment in winter. Ise Bay nourished a much higher biomass of both micro- and net-zooplankton (mean: 3.79 and 13.9 mg C m−3, respectively) than the offshore area (mean: 0.76 and 4.47 mg C m−3, respectively). In the bay, tintinnid ciliates, naked ciliates and copepod nauplii accounted for, on average, 69, 18 and 13% of the microzooplankton biomass, respectively. Of net-zooplankton biomass, copepods (i.e. Acartia, Calanus, Centropages, Microsetella and Paracalanus) formed the majority (mean: 63%). Average secondary production rates of micro- and net-zooplankton in the bay were 1.19 and 1.87 mg C m−3d−1 (or 23.1 and 36.4 mg C m−2d−1), respectively, and average tertiary production rate of net-zooplankton was 0.75 mg C m−3d−1 (or 14.6 mg C m−2d−1). Available data approximated average phytoplankton primary production rate as 1000 mg C m−2d−1 during our study period. The transfer efficiency from primary production to zooplankton secondary production was 6.0%, and the efficiency from secondary production to tertiary production was 25%. The amount of food required to support the zooplankton secondary production corresponded to 18% of the phytoplankton primary production or only 1.7% of the phytoplankton biomass, demonstrating that the grazing impact of herbivorous zooplankton was minor in Ise Bay in winter.
28 citations
"Potential roles of biotic factors i..." refers background in this paper
...…by zooplanktivorous fish and carnivorous zooplankton, such as ctenophores and chaetognaths, also capable on limiting the zooplankton abundance and distribution in marine ecosystem (Horne and Goldman, 1994; Uye et al., 2000; Escribano et al., 2007; Reaugh et al., 2007; Sullivan et al., 2007)....
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TL;DR: In this paper, the distribution and abundance of mesozooplankton in the boundary waters between the East China Sea and the Taiwan Strait were investigated using a NOR-PAC net towed horizontally at a depth of 2 m, at eight stations along a transect.
Abstract: Hydrology and trophic relationships are frequently reported for inducing changes in mesozooplankton communities. This study investigated the distribution and abundance of mesozooplankton in the boundary waters between the East China Sea and the Taiwan Strait. Samples were collected using a NOR-PAC zooplankton net towed horizontally at a depth of 2 m, at eight stations along a transect, in March (spring) and October (autumn) 2005. The abundance of mesozooplankton was significantly higher during autumn than spring. Densities of many groups (e.g., Noctilucascintillans, pteropods, copepods, mysids, euphausiids, and other larva) increased in October. During both seasons, copepods represented more than 50% of the total zooplankton abundance. Noctiluca scintillans, appendicularians, and Calanus sinicus were dominant in spring, indicating their association with the cold waters of the East China Coastal Current. Appendicularians and N. scintillans were mainly associated with the coastal waters of Taiwan; whereas C. sinicus was concentrated in the offshore waters along the coast of Mainland China. Chaetognaths, Temora turbinata, Acrocalanus spp., and radiolarians were dominant in autumn, showing their association with the warm waters of the Kuroshio Branch Current. Oncaea venusta was relatively abundant during both seasons. Our study shows that, in addition to the influence of seasonal changes in the water masses, the distribution and composition of mesozooplankton are highly influenced by trophic interactions between zooplankton taxa, in the boundary waters of the Taiwan Strait and the East China Sea.
21 citations
"Potential roles of biotic factors i..." refers background in this paper
...Thus any change in zooplankton community could affect the community of the primary producer and higher trophic level organism (Horne and Goldman, 1994; Nybakken and Bertness, 2005; Marques et al., 2008; Hsiao et al., 2011)....
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...community of the primary producer and higher trophic level organism (Horne and Goldman, 1994; Nybakken and Bertness, 2005; Marques et al., 2008; Hsiao et al., 2011)....
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...…the abundance and distribution of zooplankton in marine ecosystems (Horne and Goldman, 1994; Nybakken and Bertness, 2005; Escribano et al., 2007; Hsiao et al., 2011) Research on zooplankton community dynamics revealed that bottom-up control by phytoplankton was an important factor that…...
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...id/ej_itkt41 10 and disease were other factors which might also limiting the abundance and distribution of zooplankton in marine ecosystems (Horne and Goldman, 1994; Nybakken and Bertness, 2005; Escribano et al., 2007; Hsiao et al., 2011) Research on zooplankton community dynamics revealed that bottom-up control by phytoplankton was an important factor that determines the...
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...Variation or fluctuation in water quality might induce seasonal succession and fluctuation in the abundance and distribution of zooplankton in marine ecosystem (Woodmanse, 1958; Hsiao et al., 2011)....
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01 Jan 1975
7 citations
"Potential roles of biotic factors i..." refers background in this paper
...This condition should creating a relatively stable pattern, with low fluctuation, in both phytoplankton and zooplankton abundance in shallow water tropical coastal ecosystem (Wickstead, 1976; Raymont, 1983; Nybakken and Bertness, 2005)....
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01 Jan 2009
TL;DR: This chapter will briefly review progress in understanding predator-prey interactions in marine systems, and examine the existing evidence for bioinvasion impacts on these interactions, focusing on relatively well-studied examples.
Abstract: Predator-prey interactions are among the most fundamental processes shaping the structure and function of ecological communities, particularly in marine systems. In the past several decades, it has become clear that humans are interfering con-siderably with these interactions in many marine systems, mainly by removing top predators via harvesting (Myers and Worm 2003), but also through biological introductions. Most introduced species that have become established in their new environment should be expected to integrate in some way into the food web act-ing as consumers (predators, herbivores, detritivores) or as prey. Surprisingly, there is a relative paucity of studies that have examined the ecological effects of exotic species on predator-prey interactions, and the potential consequences of these effects for local communities. In this chapter, I will briefly review progress in understanding predator-prey interactions in marine systems, and examine the existing evidence for bioinvasion impacts on these interactions, focusing on relatively well-studied examples.
2 citations
"Potential roles of biotic factors i..." refers background in this paper
...Predator might also act as top-down control to regulate the dynamics of other zooplankton groups, thus might inducing the trophic cascade phenomena to happen in the ecosystem (Pace et al., 1998; Vadeboncoeur et al., 2005; Rilov, 2009)....
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