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 complexity of predicting individual species responses to climatic warming, even for species with well-known patterns of seasonal and geographic distribution, is demonstrated.
Abstract: Seasonality of species living at the boundaries of biogeographic zones may be more sensitive to climate change than in other regions. This is apparently the case for the ctenophore, Mnemiopsis leidyi , in Narragansett Bay, RI, which is the historical northern boundary of its distribution in the Northwest Atlantic. Seasonal advancement of population pulses of this ctenophore correlates with an increase in average annual temperatures of 1.2 °C over the last ∼50 years. Do other zooplankton in Narragansett Bay show evidence of altered phenologies? Here we examine patterns of seasonal succession of the copepod congeners, Acartia tonsa and Acartia hudsonica , for evidence of alteration over the period 1950–2004. A warming trend might be expected to limit springtime abundance of A. hudsonica , a temperate–boreal species that produces resting eggs in response to warm weather. Conversely, increasing temperatures could favor the summer dominant, A. tonsa , over its congener, allowing a shift to earlier appearance in spring, thus preserving the predator-free window that has previously allowed it a period of high production prior to ctenophore population pulses in late summer. Contrary to these predictions we found that A. hudsonica has become the dominant copepod of the congener pair. There has been no seasonal advancement of populations of A. tonsa , whose numbers have plummeted due to intensification of the predator–prey interaction with M. leidyi . In contrast, advancement of seasonal appearance of A. hudsonica is evident in sustained population increases earlier in spring (March rather than in May), although, as predicted, there is curtailment of its distribution in late spring. This latter shift is likely exacerbated by ctenophore predation. This study demonstrates the complexity of predicting individual species responses to climatic warming, even for species with well-known patterns of seasonal and geographic distribution.
60 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: This investigation was undertaken to determine the nature and seasonal distribution of the zooplankton community at a single station off Chicken Key in Biscayne Bay, Florida, and seasonal data on the water temperature, salinity and rainfall were obtained.
Abstract: This investigation was undertaken to determine the nature and seasonal distribution of the zooplankton community at a single station off Chicken Key in Biscayne Bay, Florida. Seasonal data on the water temperature, salinity and rainfall were obtained for comparison to the seasonal distribution of the zooplankton. The plankton station maintained is located at approximately 25? 37'N, 80? 17'W, about one mile east of the irrregular mainland shoreline of mangrove swamps and about one-eighth of a mile east of Chicken Key, which is a mangrove island. The depth at mean low tide for this location is six to seven feet. The station discussed here corresponds to station number eleven of Smith, Williams and Davis (1950), who present a map showing the position of Chicken Key in Biscayne Bay. Information on the seasonal distribution of zooplankton in south Florida is rather sparse. Some seasonal information on individual plankters is contained in a study of the composition of the plankton of south Florida by Davis (1950), and isolated records on various planktonic species may be obtained from the publications of Davis (1947, 1948, 1949) and Davis and Williams (1950). A brief seasonal plankton study of a quantitative nature has been included by Smith, et al. (1950') in their ecological survey of the inshore waters adjacent to Miami. Acknowledgments are accorded to Charles C. Davis, whose guidance made possible this study, to Hilary B. Moore, who offered many helpful suggestions and to J. Fred Walker, whose interest facilitated the completion of this project. Identification of most of the copepods was either made or confirmed by C. C. Davis, and the species of Lucifer was identified by Fenner A. Chace, Jr. The salinity analyses were done by Robert H. Williams. Much of the statistical analysis was done by Mrs. Hazel H. Woodmansee. For assistance in the field work acknowledgments are due my father, Ralph B. Woodmansee, who supplied the outboard motor, George and Richard Kosel, who supplied the skiff, and the Zoology Department and Marine Laboratory of the University of Miami. This project has, been partially supported by an A.A.A.S. grant made available through the Mississippi Academy of Sciences. IET IIGOD
54 citations
"Potential roles of biotic factors i..." refers background in this paper
...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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TL;DR: In this paper, the potential for copepod control of microzooplankton biomass in the dry and wet years was evaluated by comparing the estimated grazing rates of micro-plankton by the dominant copepOD species (Acartia spp. and Eurytemora affinis) to micro-phytoplankton growth rates and by calculating the percent of daily micro-zooplanton standing stock removed through copepoder grazing.
Abstract: The biomass of phytoplankton, microzooplankton, copepods, and gelatinous zooplankton were measured in two tributaries of the Chesapeake Bay during the springs of consecutive dry (below average freshwater flow), wet (above average freshwater flow), and average freshwater flow years. The potential for copepod control of microzooplankton biomass in the dry and wet years was evaluated by comparing the estimated grazing rates of microzooplankton by the dominant copepod species (Acartia spp. andEurytemora affinis) to microzooplankton growth rates and by calculating the percent of daily microzooplanton standing stock removed through copepod grazing. There were significant increases in phytoplankton and copepod biomass, but not for microzooplankton biomass in the wet year as compared to the dry year. The ctenophoreMnemiopsis leidyi was present during the dry year but was absent during the sampling period of the wet and average freshwater flow years. Grazing pressure on microzooplankton was greatest in the wet year, withAcartia spp. andE. affinis ingesting 0.21–2.64 μg of microzooplankton C copepod−1 d−1 and removing up to 60% of the microzooplankton standing stock per day. In the dry year, these copepod species ingested 0.10–0.73 μg of microzooplankton C copepod−1 d−1 with a maximum daily removal of approximately 3% of the microzooplankton standing stock. Potential copepod grazing pressure was significantly less than microzooplankton growth in the dry year, but was equivalent to microzooplankton growth in the wet year, implying strong top-down control of the microzooplankton community in the wet year. These results suggest that increased grazing control of microzooplankton populations by more copepods in the wet year released top-down control of phytoplankton. Reduced microzooplankton grazing, in conjunction with increased nutrient availability, resulted in large increases in phytoplankton biomass in the wet year. Increased freshwater flow has the potential to influence trophic cascades and the partitioning of plankton production in estuarine systems.
42 citations
TL;DR: The logistic regression proved to be a useful approach for predicting the occurrence of species under varying environmental conditions at a local scale and can be considered of reasonable application (and should be tested in other estuarine systems) due to its ability to predict the occurrences of individual zooplanktonic species associated with habitat changes.
Abstract: A novel strategy that allows to predict the responses of zooplanktonic species to environmental conditions in an estuarine temperate ecosystem (Mondego estuary) is presented. It uses 12 indicator species from the zooplanktonic Mondego database (102 species) that are common members of the different habitats, characterized by their specific hydrological conditions. Indicator-species analysis (ISA) was used to define and describe which species were typical of each of the five sampling stations in a 4-year study (2003–2006). First, a canonical correspondence analysis (CCA) was carried out to objectively identify the species-habitat affinity based on the relationship between species, stations and environmental data. Response curves for each of the zooplanktonic species, generated by univariate logistic regression on each of the independent variables temperature and salinity, were generally in agreement with the descriptive statistics concerning the occurrence of those species in this particular estuarine ecosystem. Species-specific models that predict probability of occurrence relative to environmental parameters like salinity, water temperature, turbidity, chlorophyll a, total suspended solids and dissolved oxygen were then developed for the zooplanktonic species. The multiple logistic models used contained between 1 and 3 significant parameters and the percentage correctly predicted was moderate to high, ranging from 62 to 95%. The predictive accuracy of the model was assured by direct comparison of model predictions with the observed occurrence of species obtained in 2006 (validation) and from data collected in the early 2000s in another Portuguese estuary—Ria de Aveiro (Canal de Mira), a complex mesotidal shallow coastal lagoon. The regression logistic model here defined, correctly suggested that the distribution of zooplankton species was mainly dependent on salinity and water temperature. The logistic regression proved to be a useful approach for predicting the occurrence of species under varying environmental conditions at a local scale. Therefore, this model can be considered of reasonable application (and should be tested in other estuarine systems) due to its ability to predict the occurrence of individual zooplanktonic species associated with habitat changes.
40 citations
40 citations