Linked canopy, climate, and faunal change in the Cenozoic of Patagonia

Science ◽  
2015 ◽  
Vol 347 (6219) ◽  
pp. 258-261 ◽  
Author(s):  
R. E. Dunn ◽  
C. A. E. Stromberg ◽  
R. H. Madden ◽  
M. J. Kohn ◽  
A. A. Carlini
Keyword(s):  
Faunal Change

scholarly journals Short-term change in fish assemblages after the passage of a typhoon in a temperate, coastal bay

2021 ◽  
Vol 51 (2) ◽  
pp. 175-183
Author(s):  
Mitsuharu Yagi
Keyword(s):  
Fish Assemblages ◽  
Japanese Anchovy ◽  
Short Term ◽  
Faunal Change ◽  
Short Term Change ◽  
Term Change ◽  
Fish Samples ◽  
Before And After ◽  
Coastal Bay ◽  
Tachibana Bay

To study the effects of a typhoon on a temperate, coastal bay community, the species composition, catch amount, and diversity of epipelagic fish assemblages were investigated. Fish samples were taken from catches of a purse seine fishery in Tachibana Bay, Japan between May and July 2011, covering before and after the passage of a typhoon in the area. Although major changes in total catch amount were not observed before and after the passage of the typhoon, the abundance of the Japanese anchovy, Engraulis japonicus Temminck et Schlegel, 1846, markedly decreased and bycatch of species increased, accompanied by increasing levels of diversity of the fish assemblage. Multivariate analysis showed that community differences before and after the passage were quantitative rather than qualitative. Comparisons in total length frequencies between the two periods indicated that specimens of the species compared were bigger in size for Trachurus japonicus (Temminck et Schlegel, 1844) and smaller for E. japonicus in the “after” period. These results suggest that the passage of the typhoon triggered not only interspecific faunal change but also intraspecific recruitment shifts in and around the bay.

A Temporal Hierarchy of Paleoecologic Processes Within a Middle Devonian Epeiric Sea

1990 ◽  
Vol 5 ◽  
pp. 178-209 ◽  
Author(s):  
Carlton E. Brett ◽  
Keith B. Miller ◽  
Gordon C. Baird
Keyword(s):  
Temporal Change ◽  
Explanatory Models ◽  
Temporal Scale ◽  
Short Term ◽  
Faunal Assemblages ◽  
Faunal Change ◽  
Wide Range ◽  
Ecological Theories ◽  
Stratigraphic Record ◽  
Underlying Processes

Among the most intriguing and significant aspects of the marine stratigraphic record are patterns of temporal change in fossil assemblages and paleocommunities. Understanding the stratigraphic patterns and the correct temporal scale of such faunal change is crucial to interpreting the underlying processes involved. Inattention to the temporal scale at which paleontological data are collected, and at which faunal change is observed, often results in the use of entirely inappropriate explanatory models. In many cases modern ecological theories have been misapplied to the fossil record because problems of scale were not adequately considered. The term “community” itself has been applied to such a wide range of fossil accumulations that it has ceased to have any consistent paleoecologic meaning (see discussion in Järvinen et al.,1986). For this reason, we prefer to use the term “assemblage” for time-averaged accumulations of fossils, and restrict “community” to only those organisms which actually lived together in the same space and time (i.e., a biocoenosis). Therefore, faunal assemblages, even when untransported, are the preserved amalgamated record of many successive communities within which short-term (10 – 100 years) changes may or may not be resolvable. Recurrent, compositionally similar assemblages, believed to have occupied generally similar benthic environments, are then grouped into biofacies which can be seen to intergrade and migrate through time.

Neogene mammalian faunal change in southern Asia: Correlations with climatic, tectonic, and eustatic events

Geology ◽  
1985 ◽  
Vol 13 (9) ◽  
pp. 637 ◽  
Author(s):  
John C. Barry ◽  
Noye M. Johnson ◽  
S. Mahmood Raza ◽  
Louis L. Jacobs
Keyword(s):  
Faunal Change ◽  
Southern Asia

Global correlation of the radiolarian faunal change across the Triassic–Jurassic boundary

2005 ◽  
Vol 42 (5) ◽  
pp. 777-790 ◽  
Author(s):  
Elizabeth S Carter ◽  
Rie S Hori
Keyword(s):  
Global Changes ◽  
Sedimentation Rates ◽  
Sedimentary Environments ◽  
Faunal Change ◽  
Queen Charlotte Islands ◽  
Global Correlation ◽  
Compensation Depth ◽  
Low Diversity ◽  
Upper Slope ◽  
Carbonate Compensation Depth

Precise comparison of the change in radiolarian faunas 3.5 m above a U–Pb zircon dated 199.6 ± 0.3 Ma tuff and approximately coincident with a negative δ13C anomaly in the Queen Charlotte Islands, B.C. (Canada) with Inuyama (Japan) sequences indicates that major global changes occurred across the Triassic–Jurassic (T–J) boundary. Nearly 20 genera and over 130 Rhaetian species disappeared at the end of the Triassic. The index genera Betraccium and Risella disappear and the final appearance of Globolaxtorum tozeri, Livarella valida, and Pseudohagiastrum giganteum sp. nov. are also diagnostic for the end of the Triassic. The low-diversity Hettangian survival fauna immediately above the boundary is composed mainly of small, primitive spumellarians with spongy or irregularly latticed meshwork and rod-like spines, and new genera Charlottea, Udalia, and Parahsuum s.l. first appear in the lowest Hettangian in both localities. Irrespective of different sedimentation rates and sedimentary environments, such as shelf to upper slope (Queen Charlotte Islands) and deep sea below carbonate compensation depth (CCD; Inuyama), radiolarians show a similar turnover pattern at the T–J boundary.

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