The relationship between soft-bottom macrobenthic communities and environmental variables off Ningjin, eastern Shandong Peninsula

Abstract Bernal, M., Stratoudakis, Y., Wood, S., Ibaibarriaga, L., Uriarte, A., Valdés, L., and Borchers, D. 2011. A revision of daily egg production estimation methods, with application to Atlanto-Iberian sardine. 2. Spatially and environmentally explicit estimates of egg production. – ICES Journal of Marine Science, 68: . A spatially and environmentally explicit egg production model is developed to accommodate a number of assumptions about the relationship between egg production and mortality and associated environmental variables. The general model was tested under different assumptions for Atlanto-Iberian sardine. It provides a flexible estimator of egg production, in which a range of assumptions and hypotheses can be tested in a structured manner within a well-defined statistical framework. Application of the model to Atlanto-Iberian sardine increased the precision of the egg production time-series, and allowed improvements to be made in understanding the spatio-temporal variability in egg production, as well as implications for ecology and stock assessment.

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Consistency of patterns between laboratory experiments and field collected fish in otolith chemistry: an example and applications for salinity reconstructions

Marine and Freshwater Research ◽

10.1071/mf04146 ◽

2005 ◽

Vol 56 (5) ◽

pp. 609 ◽

Cited By ~ 71

Author(s):

T. S. Elsdon ◽

B. M. Gillanders

Keyword(s):

Environmental Variables ◽

Laboratory Experiments ◽

Juvenile Fish ◽

Otolith Chemistry ◽

Ambient Water ◽

Elemental Concentrations ◽

Adequate Knowledge ◽

Black Bream ◽

Environmental Histories ◽

The Relationship

Elemental concentrations within fish otoliths can track movements and migrations of fish through gradients of environmental variables. Tracking the movements of fish relies on establishing links between environmental variables and otolith chemistry, with links commonly made using laboratory experiments that rear juvenile fish. However, laboratory experiments done on juvenile fish may not accurately reflect changes in wild fish, particularly adults. We tested the hypotheses that: (1) the relationship between ambient (water) and otolith chemistry is similar between laboratory-reared black bream (Acanthopagrus butcheri) and wild black bream; and (2) ontogeny does not influence otolith chemistry. Field-collected and laboratory-reared fish showed similar effects of ambient strontium : calcium (Sr : Ca) on otolith Sr : Ca concentrations. However, ambient and otolith barium : calcium concentrations (Ba : Ca) differed slightly between laboratory-reared and field-collected fish. Importantly, fish reared in stable environmental variables showed no influence of ontogeny on Sr : Ca or Ba : Ca concentrations. Natural distributions of ambient Sr : Ca showed no clear relationship to salinity, yet, ambient Ba : Ca was inversely related to salinity. The distribution of ambient Sr : Ca and Ba : Ca in estuaries inhabited by black bream, suggest that these elements can answer different questions regarding environmental histories of fish. Reconstructing salinity histories of black bream using otolith Ba : Ca concentrations seems plausible, if adequate knowledge of Ba : Ca gradients within estuaries is obtained.

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Minimal sampling requirements for a precise assessment of soft-bottom macrobenthic communities, using AMBI

Journal of Experimental Marine Biology and Ecology ◽

10.1016/j.jembe.2007.05.026 ◽

2007 ◽

Vol 349 (2) ◽

pp. 323-333 ◽

Cited By ~ 20

Author(s):

Iñigo Muxika ◽

Leire Ibaibarriaga ◽

José Ignacio Sáiz ◽

Ángel Borja

Keyword(s):

Soft Bottom ◽

Macrobenthic Communities ◽

Precise Assessment

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Monitoring studies should consider temporal variability to reveal relations between cyanobacterial abundance and environmental variables

Anais da Academia Brasileira de Ciências ◽

10.1590/0001-3765201520140416 ◽

2015 ◽

Vol 87 (3) ◽

pp. 1717-1726 ◽

Cited By ~ 3

Author(s):

JULIANA WOJCIECHOWSKI ◽

ANDRÉ A. PADIAL

Keyword(s):

Temporal Variability ◽

Environmental Variables ◽

Environmental Changes ◽

Environmental Variability ◽

Time Lag ◽

Cyanobacteria Blooms ◽

Environment Variables ◽

Sampling Points ◽

The Relationship

One of the main goals of monitoring cyanobacteria blooms in aquatic environments is to reveal the relationship between cyanobacterial abundance and environmental variables. Studies typically correlate data that were simultaneously sampled. However, samplings occur sparsely over time and may not reveal the short-term responses of cyanobacterial abundance to environmental changes. In this study, we tested the hypothesis that stronger cyanobacteria x environment relationships in monitoring are found when the temporal variability of sampling points is incorporated in the statistical analyses. To this end, we investigated relationships between cyanobacteria and seven environmental variables that were sampled twice yearly for three years across 11 reservoirs, and data from an intensive monitoring in one of these reservoirs. Poor correlations were obtained when correlating data simultaneously sampled. In fact, the 'highly recurrent' role of phosphorus in cyanobacteria blooms is not properly observed in all sampling periods. On the other hand, the strongest correlation values for the total phosphorus x cyanobacteria relationship were observed when we used the variation of sampling points. We have also shown that environment variables better explain cyanobacteria when a time lag is considered. We conclude that, in cyanobacteria monitoring, the best approach to reveal determinants of cyanobacteria blooms is to consider environmental variability.

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Comparative study of the structure of some tropical and temperate marine soft-bottom macrobenthic communities

Marine Biology ◽

10.1007/bf00393108 ◽

1987 ◽

Vol 95 (4) ◽

pp. 641-649 ◽

Cited By ~ 46

Author(s):

R. M. Warwick ◽

Ruswahyuni

Keyword(s):

Comparative Study ◽

Soft Bottom ◽

Macrobenthic Communities

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Efficiency of sampling gears (Quadrate and Core) and Taxonomic Resolution on the Soft Bottom Intertidal Macrobenthic community of Port Blair coast

Research Journal of Chemistry and Environment ◽

10.25303/2511rjce93103 ◽

2021 ◽

Vol 25 (11) ◽

pp. 93-103

Author(s):

Nosad Sahu ◽

Ganesh Thiruchitrambalam ◽

Raj Kiran Lakra

Keyword(s):

Correlation Coefficient ◽

Similarity Index ◽

Rank Correlation ◽

Work Capacity ◽

Information Loss ◽

Taxonomic Resolution ◽

Soft Bottom ◽

Macrobenthic Communities ◽

Taxonomic Level ◽

Family Level

Ecological studies of a region cannot proceed forward without the evaluation of species diversity. With the ever-increasing demand for studies to understand the change in the macrobenthic communities, the focus has primarily been shifted towards faster results to track down the changes from the prior environments. Therefore, studying the complete benthos faunal diversity of an area leads to an unrealistic approach. Thus, researchers tend to depend on various sampling gears, which ease the work capacity. The present study compared two samplings gears (core and quadrate) in two different habitats to understand the diversity of the macrobenthic communities. In terms of abundance, the core gear showed higher significant differences as compared to quadrate. However, the gears did not significantly differ among the diversity indices (Margalef's index and Shannon- Winer index) and the cluster analysis (Bray-Curtis similarity index and nMDS). The present study found that the 'information loss' was minimal with the aggregated data at a higher taxonomic level. Spearman rank correlation coefficient revealed that the information loss was low up to family-level and the correlation coefficient decreases as the taxonomic level increases after family-level. Nonetheless, the choice of sampling gears did not influence the diversity of the soft-bottom intertidal macrobenthic communities.

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