Temat: mass extinction - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Późno dewońskie impakty
Late Devonian impacts
Autorzy:: Brachaniec, Tomasz
Brom, Krzysztof
Tematy:: Frasnian-Famennian boundary
Late Devonian
Siljan crater
mass extinction; Pokaż więcej
Data publikacji:: 2015
Powiązania:: https://bibliotekanauki.pl/articles/1033026.pdf Link otwiera się w nowym oknie
Źródło:: Acta Societatis Metheoriticae Polonorum; 2015, 6; 34-37
2080-5497
Pojawia się w:: Acta Societatis Metheoriticae Polonorum
Opis:: In 1970 the first hypothesis, which claimed that large meteorite landed in ocean at Frasnian/Famennian boundary and caused mass extinction was proposed. In Late Devonian deposits there are many potential impact evidences. Nonetheless, many years of searching for iridium anomaly, shocked minerals, microtektites and craters in the F/F boundary passage deposits have failed. The most probably crater, which could be connected with F/F boundary is Siljan Ring in Sweden.
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Proliferation of abnormal palynoflora during the end-Devonian biotic crisis
Autorzy:: Filipiak, P.
Racki, G.
Tematy:: Devonian-Carboniferous transition
mutation
palynomorphs
tetrads
mass extinction
volcanism; Pokaż więcej
Data publikacji:: 2010
Powiązania:: https://bibliotekanauki.pl/articles/2059045.pdf Link otwiera się w nowym oknie
Źródło:: Geological Quarterly; 2010, 54, 1; 1-14
1641-7291
Pojawia się w:: Geological Quarterly
Opis:: The dispersed miospore assemblage of the Retispora lepidophyta-Verrucosisporites nitidus (LN) Zone from the Holy Cross Mountains(Poland) is marked by enrichment (above 4%) in abnormal spore morphotypes during a terrestrial flora turnover close to the Devonian-Carboniferous boundary, recorded just above the Hangenberg Black Shale level. Incomplete and complete tetrads represent mostly Vallatisporites spp., supplemented by Grandispora, Retusotriletes and Apiculiretusispora. Additional peculiar morphotypes, marked byanomalous overall shape and ornamentation, are interpreted as mutated varieties of Vallatisporites based on intermediate morphologicalstages, connecting them with this well known genus. This relatively high aberrant palynomorph frequency is accompanied by volcanicash intercalations, as well as by charcoal debris and polycyclic aromatic biomarkers indicative of forest wildfire. Thus, the anomalousspore morphology could reflect the mutagenic effect of regional acidification due to explosive volcanism. However, palynological literature data from NW France and Canada highlight the possibility of a supra-regional mutated miospore signal near the Devonian-Carboniferous boundary, and there is need for high-resolution studies of the LN Zone to examine this. The end-Permian scenario of abnormalfloral growth in immensely stressed habitats may therefore apply to other potentially volcanically-induced biotic turnovers.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: The Late Devonian (Frasnian/Famenian) mass extinction : a proposed test of the glaciation hypothesis
Autorzy:: Mc-Ghee, G. R.
Tematy:: mass extinction
glaciation
Late Palaeozoic Ice Age
Cenozoic Ice Age; Pokaż więcej
Data publikacji:: 2014
Powiązania:: https://bibliotekanauki.pl/articles/2059745.pdf Link otwiera się w nowym oknie
Źródło:: Geological Quarterly; 2014, 58, 2; 263--268
1641-7291
Pojawia się w:: Geological Quarterly
Opis:: It is argued in this paper that late Frasnian global cooling was the first step in the onset of the Late Palaeozoic Ice Age, and that the late Frasnian extinctions are analogous to the early Oligocene (Oi-1) extinctions that took place in the first step in the onset of the Cenozoic Ice Age. It is argued that the physical evidence for the existence of late Frasnian glaciation, like the Oi-1 glaciation, is largely geochemical: the sharp increases in δ18O values and positive δ13C anomalies that occurred in the late Frasnian and earliest Famennian. In addition to the geochemical evidence, also like the Oi-1 glaciation, stratigraphic calculations indicate a major sea-level fall occurred during the late Frasnian and early Famennian, a sea-level fall that is argued to have been glacially produced. It is here proposed that the best possible independent physical evidence for the existence of late Frasnian glaciation, other than the geochemical and sea-level evidence, would be the discovery of ice-rafted debris in marine sediments of late Frasnian age similar to the ice-rafted debris found in Oi-1 marine sediments (Zachos et al., 1992; Ehrmann and Mackensen, 1992).
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Trace element variations as a proxy for reconstruction of palaeoenvironmental changes during the Late Aeronian faunal and carbon isotope perturbations: new data from the peri-Gondwanan region
Autorzy:: Pašava, J.
Frýda, J.
Štorch, P.
Tematy:: Aeronian
graptolite mass extinction
redox-sensitive trace elements
Barrandian area
Bohemian Massif; Pokaż więcej
Data publikacji:: 2017
Powiązania:: https://bibliotekanauki.pl/articles/2060353.pdf Link otwiera się w nowym oknie
Źródło:: Geological Quarterly; 2017, 61, 1; 91--98
1641-7291
Pojawia się w:: Geological Quarterly
Opis:: Trace element variations in the Upper Aeronian (Llandovery, Lower Silurian), deep-water, black shale succession of the Barrandian area (Perunica) were studied across an interval associated with a graptolite mass extinction and global, positive carbon isotope anomaly. The main aim of the paper is to test whether distinct changes in graptolite diversity during Late Aeronian were linked with changes in deep sea water oxygenation. Using multiple geochemical proxies we documented high-frequency changes in oxygenation of sea water from sediments of the convolutus to linnaei (guerichi) biozones. Detailed comparison of graptolite diversity with those high-frequency oxygenation changes suggests that the long-term and step-wise Late Aeronian graptolite crisis was not significantly influenced by changes in oxygen level and thus it probably resulted by another causes. The collapse of global carbon cycle during the Late Aeronian probably only temporarily increased extinction rate of the long-term graptolite crisis and considerably decreased evenness of the uppermost Aeronian graptolite communities. The Aeronian graptolite mass extinction was thus primarily driven by other biotic and/or abiotic causes
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Post-extinction brachiopod faunas from the Late Permian Wuchiapingian coal series od South China
Autorzy:: Chen, Z Q
Campi, M.J.
Shi, G.R.
Kaiho, K.
Tematy:: Lopingian
Wuchiapingian
brachiopod
Permian
China
Late Permian
mass extinction
Guadalupian
Brachiopoda
paleontology; Pokaż więcej
Data publikacji:: 2005
Powiązania:: https://bibliotekanauki.pl/articles/20940.pdf Link otwiera się w nowym oknie
Źródło:: Acta Palaeontologica Polonica; 2005, 50, 2
0567-7920
Pojawia się w:: Acta Palaeontologica Polonica
Opis:: This paper describes fourteen brachiopod species in eleven genera from the Late Permian Wuchiapingian Coal Series (Lungtan Formation) of South China. Of these, the shell bed fauna from the basal Lungtan Formation is interpreted to represent the onset of the recovery of shelly faunas in the aftermath of the Guadalupian/Lopingian (G/L) mass extinction in South China. The post−extinction brachiopod faunas in the Wuchiapingian are characterized by the presence of numerous Lazarus taxa, survivors, and newly originating taxa. These elements capable of adapting their life habits were relatively more resistant to the G/L crisis. The post−extinction faunas, including survivors and the elements originating in the recovery period, have no life habit preference, but they were all adapted to a variety of newly vacated niches in the Late Permian oceans. Two new species, Meekella beipeiensis and Niutoushania chongqingensis, are described, and two Chinese genera, Niutoushania and Chengxianoproductus, are emended based on re−examination of the type specimens and new topotype materials from the Lungtan Formation.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Ammonoid biodiversity changes across the Cenomanian-Turonian boundary in the Yezo Group, Hokkaido, Japan
Autorzy:: Kurihara, K.
Toshimitsu, S.
Hirano, H.
Tematy:: ammonoid
biodiversity change
Cenomanian
Turonian
boundary
Yezo Group
Hokkaido
Japan
mass extinction
Cretaceous; Pokaż więcej
Data publikacji:: 2012
Powiązania:: https://bibliotekanauki.pl/articles/20711.pdf Link otwiera się w nowym oknie
Źródło:: Acta Palaeontologica Polonica; 2012, 57, 4
0567-7920
Pojawia się w:: Acta Palaeontologica Polonica
Opis:: Ammonoid biodiversity changes from shallow to offshore environments across the Cenomanian–Turonian (C–T) boundary are reconstructed in the Yezo Group, Hokkaido, Japan. This group was probably deposited at approximately 35–45ºN along a westward subduction margin in the northeastern Asian continent. Temporal changes in species richness in the Yezo Group, which show persistently high values during the middle Cenomanian and then decline stepwise from near the middle–late Cenomanian boundary, resemble those in Europe, but not those in Tunisia and the Western Interior. These differences suggest that the Cenomanian–Turonian “mass extinction” was not a global event for ammonoids but was restricted to mid−palaeolatitudinal regions (Europe and Japan). Sea level and climate changes probably influenced ammonoid faunas in the Yezo Group as well as those in Europe. However, it is unlikely that a single, simple cause led to the C–T boundary “mass extinction” because various abiotic changes in the Cenomanian–Turonian transition have been detected, and biotic and abiotic change are interrelated.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: The last Frasnian Atrypida [Brachiopoda] in southern Belgium
Autorzy:: Godefroid, J
Helsen, S
Tematy:: brachiopod fauna
fauna
Frasnian
Devonian
Belgium
Atrypida
mass extinction
biostratigraphy
taxonomy
paleontology
Brachiopoda; Pokaż więcej
Data publikacji:: 1998
Powiązania:: https://bibliotekanauki.pl/articles/21597.pdf Link otwiera się w nowym oknie
Źródło:: Acta Palaeontologica Polonica; 1998, 43, 2
0567-7920
Pojawia się w:: Acta Palaeontologica Polonica
Opis:: The last representatives of the order Atrypida on the southern flank of the Dinant Synclinorium (Vaulx-Nismes area) in Belgium belong to Costatrypa, Spinatrypa, Spinatrypina (?Spinatrypina), Spinatrypina (Exatrypa), Iowatrypa, ?Waiotrypa, Desquamatia (Desquamatia) and Desquamatia (?Seratrypa). Among the thirteen described taxa, five are new: Spinatrypa tumuli sp. n., Iowatrypa circuitionis sp. n., ?Waiotrypa pluvia sp. n., Desquamatia (Desquamatia) quieta sp. n. and Desquamatia (?Seratrypa) derelicta sp. n. Supposed lissatrypid 'Glassia drevermanni' Maillieux, 1936 from the late Frasnian Matagne shales is assigned to the Rhynchonellida. On the southern flank of the Dinant Synclinorium and in the Philippeville Massif, the Atrypida become extinct in the Palmatolepis rhenana Zone, significantly below the Frasnian-Famennian (F-F) boundary. Their extinction coincides with the first appearance of the green and black shales of the late Frasnian Matagne Formation, recording a transgressive-hypoxic event. Based on conodont data, this event takes place earlier on the southern flank of the Dinant Synclinorium than in the Philippeville Massif.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Assessing confidence intervals for stratigraphic ranges of higher taxa: The case of Lissamphibia
Autorzy:: Marjanovic, D
Laurin, M.
Tematy:: stratigraphic range
mass extinction
paleontology
biodiversity
amphibian
origination time
evolution
fossil record
Lissamphibia; Pokaż więcej
Data publikacji:: 2008
Powiązania:: https://bibliotekanauki.pl/articles/20103.pdf Link otwiera się w nowym oknie
Źródło:: Acta Palaeontologica Polonica; 2008, 53, 3
0567-7920
Pojawia się w:: Acta Palaeontologica Polonica
Opis:: To evaluate stratigraphic evidence for the time of origin of the clade of extant amphibians (Lissamphibia), we attempt to establish a confidence interval on the lower bound of the stratigraphic range of this clade. This is based on the stratigraphic distribution of 1207 fossiliferous localities that have yielded lissamphibians, the relative area of sedimentary rocks from various periods (upper Paleozoic to present) exposed on the continents, and ten exponential−growth models of lissamphibian diversity that differ by the assumed effects of three major biological crises and the assumed starting times of lissamphibian diversification. The results suggest a more recent origin of Lissamphibia than advocated in most recent molecular studies. They are also more compatible with monophyly than with polyphyly of the extant amphibians, but heavily depend on poorly constrained assumptions about lissamphibian extinction rates during biological crises. Counts of lissamphibian diversity through time that consider ghost lineages and stage durations show moderate declines across the Cretaceous–Paleogene and Oligocene–Miocene boundaries.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Mesozoic mass extinctions and angiosperm radiation: does the molecular clock tell something new?
Autorzy:: Ruban, Dmitry A.
Tematy:: angiosperms
radiation
mass extinction
molecular clock
Mesozoic
promieniowanie
masowe wyginięcie
zegar molekularny
mezozoik; Pokaż więcej
Data publikacji:: 2012
Powiązania:: https://bibliotekanauki.pl/articles/94220.pdf Link otwiera się w nowym oknie
Źródło:: Geologos; 2012, 18, 1; 37-42
1426-8981
2080-6574
Pojawia się w:: Geologos
Opis:: Angiosperms evolved rapidly in the late Mesozoic. Data from the genetic-based approach called ’molecular clock’ permit an evaluation of the radiation of flowering plants through geological time and of the possible influences of Mesozoic mass extinctions. A total of 261 divergence ages of angiosperm families are considered. The radiation of flowering plants peaked in the Albian, early Campanian, and Maastrichtian. From the three late Mesozoic mass extinctions (Jurassic/Cretaceous, Cenomanian/Turonian, and Cretaceous/Palaeogene), only the Cretaceous/Palaeogene event coincided with a significant, abrupt, and long-term decline in angiosperm radiation. If their link will be further proven, this means that global-scale environmental perturbation precluded from many innovations in the development of plants. This decline was, however, not unprecedented in the history of the angiosperms. The implication of data from the molecular clock for evolutionary reconstructions is limited, primarily because this approach deals with only extant lineages.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Diversity dynamics of Early-Middle Jurassic brachiopods of Caucasus, and the Pliensbachian-Toarcian mass extinction
Autorzy:: Ruban, D A
Tematy:: taxonomic diversity
brachiopod
Early-Middle Jurassic
Russia
mass extinction
Caucasus Mountains
Jurassic
Brachiopoda
paleontology; Pokaż więcej
Data publikacji:: 2004
Powiązania:: https://bibliotekanauki.pl/articles/21213.pdf Link otwiera się w nowym oknie
Źródło:: Acta Palaeontologica Polonica; 2004, 49, 2
0567-7920
Pojawia się w:: Acta Palaeontologica Polonica
Opis:: Taxonomic diversity of NW Caucasus brachiopods changed cyclically in the Early–Middle Jurassic. Diversifications took place in the Late Sinemurian–Early Pliensbachian, Middle–Late Toarcian and Late Aalenian–Early Bajocian, while diversity decreases occured in Late Pliensbachian–Early Toarcian, Early Aalenian and Late Bajocian. Outstanding diversity decline in the Late Pliensbachian–Early Toarcian corresponds to a global mass extinction interval, whose peak has been documented in the Early Toarcian. Similar diversity changes of brachiopods are observed in other Tethyan regions, including the well−studied Bakony Mountains, although in NW Caucasus the recovery after demise have begun earlier. The causes of Pl−To mass extinction in the studied region are enigmatic. Probably, it could be linked to anoxia, but its correspondence to the beginning of transgression is not coincident with the global record, so eustatic causes seem to be doubtful for this region.
Dostawca treści:: Biblioteka Nauki

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