Seasonal variability of stable isotope values and niche size in tropical calanoid copepods and zooplankton size fractions

Kozak, Eva R.; Franco-Gordo, Carmen; Godínez-Domínguez, Enrique; Suárez‐Morales, Eduardo; Ambriz-Arreola, Israel

doi:10.1007/s00227-020-3653-7

Cited by 21 publications

(9 citation statements)

References 49 publications

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“…A large number of small Sagitta narrowed the niche partition between Sagitta and large calanoids in spring. Many studies have suggested that nonconsistent patterns are assumed in the base of pelagic food for the response to the changes of primary productivity and planktonic biomass (Giering et al, 2019;Kozak et al, 2020). Our results showed that the niche partition among different zooplankton groups was most distinct in the winter, and followed by the summer.…”

Section: Seasonal and Regional Variability In Trophic Niche Of Zoopla...mentioning

confidence: 49%

“…Seasonal changes in the low levels of pelagic food web can be due to changes in food quality and the active choice of prey type (Kozak et al, 2020). Most copepods are omnivores feeding on a wide range of food items, including phytoplankton, debris, and ciliates (Loṕez-Ibarra et al, 2018;Schoo et al, 2018).…”

Section: Seasonal and Regional Variability In Trophic Niche Of Zoopla...mentioning

confidence: 99%

“…The species composition and abundance of zooplankton can be quickly changed by the variation of environmental factors, and potentially affect ecosystem function and biogeochemical cycling (Dickman et al, 2008). Knowledge of zooplankton trophic structure is necessary to understand food-web function and response to climate change or human activities (Kozak et al, 2020;Nagelkerken et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

“…Generally, short food webs are expected in eutrophic ecosystems compared to oligotrophic ecosystems (Armengol et al, 2019). However, Kozak et al (2020) reported that increased primary and secondary productivity results in an increase of food web complexity, and produces longer food chains. The response of zooplankton trophic structure to eutrophication might be different in various marine ecosystems.…”

Section: Introductionmentioning

confidence: 99%

“…In this study, we investigated the spatial and seasonal distribution of zooplankton stable isotope values in Jiaozhou Bay. Seasonal variations of stable isotopic signatures in zooplankton remain mostly undescribed in coastal bay, which is important as a baseline reference for trophic structure analyses in marine ecosystem (Kozak et al, 2020). We compared the relative trophic positions of the dominant zooplankton groups in different seasons.…”

Section: Introductionmentioning

confidence: 99%

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Spatial and Seasonal Variations in the Stable Isotope Values and Trophic Positions of Dominant Zooplankton Groups in Jiaozhou Bay, China

Li²,

Chen³

et al. 2022

Front. Mar. Sci.

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The spatial and seasonal distributions of stable carbon and nitrogen isotopes (δ13C and δ15N) in dominant zooplankton groups were investigated in Jiaozhou Bay. Zooplankton δ13C values ranged from −22.89‰ to −15.86‰, and δ15N values ranged from 3.18‰ to 13.57‰, respectively. The δ13C and δ15N values generally followed the order of small zooplankton < large calanoids < small Sagitta < large Sagitta. Spatial distribution patterns of zooplankton δ13C and δ15N values varied in different seasons. Our results suggested that the spatial variation of δ13C was mainly controlled by terrigenous organic matter (OM) input and phytoplankton biomass, but water temperature may have played a key role in the seasonal variation of δ13C. In spring, the high phytoplankton biomass might increase the δ13C value of small zooplankton in the inner bay. During other seasons, the δ13C values of zooplankton generally increased from the inner bay to the outer bay, which might be associated with the influence of 13C-depleted terrigenous OM carried by the river discharge. Small zooplankton stable isotope values were significantly correlated with that of particulate organic matter (POM). The influence of anthropogenic nutrient input on isotopic baseline can be cascaded to the zooplankton, and the effect might be weak at higher trophic levels. The Bayesian standard ellipse areas of dominant zooplankton groups were generally smallest in the winter, suggesting a narrow niche width during that time. The niche partition between small zooplankton, large calanoids, and Sagitta was most distinct in winter, and followed by summer. The relative trophic level of Sagitta ranged from 2.23 to 4.01, which generally declined from the inner bay to the outer bay during the spring, autumn, and winter seasons. High anthropogenic nutrient loading might reduce the difference in trophic niches among zooplankton groups. This study provided detailed information on the distribution of zooplankton δ13C and δ15N in a coastal bay, which will be useful for understanding the anthropogenic influence on the ecosystem structure and function.

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Section: Seasonal and Regional Variability In Trophic Niche Of Zoopla...mentioning

confidence: 49%

Section: Seasonal and Regional Variability In Trophic Niche Of Zoopla...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Spatial and Seasonal Variations in the Stable Isotope Values and Trophic Positions of Dominant Zooplankton Groups in Jiaozhou Bay, China

Li²,

Chen³

et al. 2022

Front. Mar. Sci.

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Long‐term evolution of the structure of the St. Lawrence (Canada) marine ecosystem in the context of climate change and anthropogenic activities: An isotopic perceptive

Rioux,

Cabrol,

Lesage

2023

Ecology and Evolution

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Documenting long‐term changes in the trophic structure of food webs and how species respond to these changes is essential to forecast their vulnerability and resilience to environmental stressors. Over the past decades, the St. Lawrence marine ecosystem (Canada) has experienced major changes in its physical, chemical, and biological conditions from overfishing, acoustic and chemical pollution, climate change, and the increased abundance of some top predators. These changes have likely affected the trophodynamics of the ecosystem, and are suspected to have deleterious effects on endangered species of mammals and other components of the ecosystem, such as blue whales (Balaenoptera musculus), fin whales (B. physalus), and beluga (Delphinapterus leucas). This study examined the trophic structure of the St. Lawrence marine ecosystem, including the isotopic niche of various species, over two periods of contrasting pressures from anthropogenic and climatic stressors (1995–2003 vs. 2019–2021). Stable isotope ratios were measured in 1240 samples of 21 species of marine invertebrates, fishes, and mammals sampled during both periods. A significant change in the isotopic value and niche position between periods is observed in most of the sampled species. While the direction of change and effect size were not uniform among species, these changes confirmed that substantial modifications in community structure have occurred over time. Niche overlap decreased considerably among some of the pelagic and demersal fishes, and among whale species during the most recent period. Combined with a concomitant reduction in niche breadth in several species, these observations suggested that resource sharing was limited among these species. This study highlighted some degree of dietary plasticity in several species, and a long‐term change in the trophic structure of the St. Lawrence marine ecosystem, with likely effects on diet composition and energetics of several populations, including endangered species.

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Movements and trophic ecology of dolphinfish (Coryphaena hippurus) in the Mexican Central Pacific inferred from stomach content, bulk, and compound-specific stable isotope analyses

et al. 2023

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Seasonal variability of stable isotope values and niche size in tropical calanoid copepods and zooplankton size fractions

Cited by 21 publications

References 49 publications

Spatial and Seasonal Variations in the Stable Isotope Values and Trophic Positions of Dominant Zooplankton Groups in Jiaozhou Bay, China

Spatial and Seasonal Variations in the Stable Isotope Values and Trophic Positions of Dominant Zooplankton Groups in Jiaozhou Bay, China

Long‐term evolution of the structure of the St. Lawrence (Canada) marine ecosystem in the context of climate change and anthropogenic activities: An isotopic perceptive

Movements and trophic ecology of dolphinfish (Coryphaena hippurus) in the Mexican Central Pacific inferred from stomach content, bulk, and compound-specific stable isotope analyses

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