Heliolitid corals and their competitors: a case study from the Wellin patch reefs, Middle Devonian, Belgium

Lethaia ◽  
2021 ◽  
Author(s):  
Jan J. Król ◽  
Julien Denayer ◽  
Paweł Wolniewicz ◽  
Mikołaj K. Zapalski
Keyword(s):  
Middle Devonian ◽  
Patch Reefs

Massive tabulates in competition for space: A case study from Aferdou el Mrakib (Middle Devonian, Anti-Atlas, Morocco)

2018 ◽  
Vol 497 ◽  
pp. 105-116 ◽  
Author(s):  
Jan J. Król ◽  
Michał Jakubowicz ◽  
Mikołaj K. Zapalski ◽  
Błażej Berkowski
Keyword(s):  
Middle Devonian ◽  
Competition For Space

scholarly journals Supplemental Material: Early–Middle Devonian brachiopod provincialism and bioregionalization at high latitudes: A case study from southwestern Gondwana

2020 ◽  
Author(s):  
C.R. Penn-Clarke ◽  
D.A.T. Harper
Keyword(s):  
Cluster Analysis ◽  
Middle Devonian ◽  
High Latitudes

Two-way Jaccard cluster analysis of the dataset comparing the relational grouping among brachiopod genera to their respective depobasins and bioregions.

scholarly journals Reef-Fish Abundance, Biomass, and Biodiversity Inside and Outside No-Take Marine Zones in the Florida Keys National Marine Sanctuary: 1999–2018

2021 ◽  
Vol 34 (2) ◽  
Author(s):  
Megan Medina ◽  
◽  
Cara Estes ◽  
Benjamin Best ◽  
Christopher Stallings ◽  
...  
Keyword(s):  
Reef Fish ◽  
Florida Keys ◽  
Diversity Indices ◽  
Fish Abundance ◽  
Marine Biodiversity ◽  
Visual Census ◽  
Patch Reefs ◽  
Observation Network ◽  
Observation Period

Observations from the Reef Visual Census program in the Florida Keys National Marine Sanctuary (FKNMS) between 1999 and 2018 were used as a US Marine Biodiversity Observation Network case study to assess whether differences in biodiversity metrics (abundance, biomass, richness, Simpson diversity, and functional diversity) occurred across regions with different habitat types (high-relief, linear, and patch reefs), protection levels (no-take and unprotected zones), and types of protected zones. Protected areas had higher reef-fish biomass compared to unprotected areas at the beginning of the observation period, but these metrics decreased over time. We did not detect an effect of size of no-take marine zones, but rather found that large (18.7 km2) and small (average of 0.85 km2) areas had similar reef-fish abundance, biomass, and diversity indices. High-relief reef habitats had the greatest reef-fish abundance (20%–30%) and species richness (~20%), and nearly twice the biomass of other habitat strata, but biomass decreased 20%–30% in linear and patch reefs after 2007. Although high-relief reefs are important for biodiversity conservation and restoration, policies should address the decline in fish abundance, biomass, and diversity observed throughout the FKNMS. Monitoring should be sustained to support policies and respond to changing conditions related to climate change and resource use.

scholarly journals Supplemental Material: Early–Middle Devonian brachiopod provincialism and bioregionalization at high latitudes: A case study from southwestern Gondwana

2020 ◽  
Author(s):  
C.R. Penn-Clarke ◽  
D.A.T. Harper
Keyword(s):  
Cluster Analysis ◽  
Middle Devonian ◽  
High Latitudes

Two-way Jaccard cluster analysis of the dataset comparing the relational grouping among brachiopod genera to their respective depobasins and bioregions.

Neomorphism of the Middle Devonian Ratner limestone related to dehydration of gypsum in south-central Saskatchewan

2007 ◽  
Vol 44 (5) ◽  
pp. 695-705 ◽  
Author(s):  
Qilong Fu ◽  
Hairuo Qing
Keyword(s):  
Middle Devonian ◽  
Isotopic Data ◽  
Water Mixing ◽  
South Central ◽  
Gypsum Dehydration

The Middle Devonian Ratner Formation in south-central Saskatchewan consists of laminated carbonate and interlaminated to interbedded carbonate and anhydrite, and the Ratner carbonate is preserved as limestone in many cored intervals. Medium to very coarsely crystalline (MVC) limestone (up to 4 m in thickness) is dominantly present in the uppermost part or the upper cycle of the Ratner Formation directly overlain by the Whitkow anhydrite. Generally, both abundance and size of the MVC calcite crystals decrease downward away from contact between the Ratner carbonate and the Whitkow anhydrite. The average 87Sr/86Sr ratio of the MVC calcite is 0.7078, comparable to that of Middle Devonian seawater. The Ratner MVC limestone is interpreted to result from neomorphism of the precursor microcrystalline lime mudstone in burial environments, and neomorphic fluids might have consisted of gypsum-dehydration water mixing with minor various ratios of formation waters, based on petrographic observation, O- and Sr-isotopic data, and stratigraphic evidence. This research provides a case study in which the neomorphism of limestone is related to gypsum-dehydration water.

The Genesis and Internal Dynamics of El Salvador's People's Revolutionary Army, 1970–1976

2014 ◽  
Vol 38 (01) ◽  
pp. 102-129
Author(s):  
ALBERTO MARTÍN ÁLVAREZ ◽  
EUDALD CORTINA ORERO
Keyword(s):  
Latin America ◽  
El Salvador ◽  
Early Years ◽  
Left Wing ◽  
Internal Dynamics ◽  
Internal Coherence ◽  
The 1960S

AbstractUsing interviews with former militants and previously unpublished documents, this article traces the genesis and internal dynamics of the Ejército Revolucionario del Pueblo (People's Revolutionary Army, ERP) in El Salvador during the early years of its existence (1970–6). This period was marked by the inability of the ERP to maintain internal coherence or any consensus on revolutionary strategy, which led to a series of splits and internal fights over control of the organisation. The evidence marshalled in this case study sheds new light on the origins of the armed Salvadorean Left and thus contributes to a wider understanding of the processes of formation and internal dynamics of armed left-wing groups that emerged from the 1960s onwards in Latin America.

Culture and the plasticity of perception

2020 ◽  
Vol 43 ◽  
Author(s):  
Michael Lifshitz ◽  
T. M. Luhrmann
Keyword(s):  
Cultural Context ◽  
Sensory Experience ◽  
Cultural Learning ◽  
The World

Abstract Culture shapes our basic sensory experience of the world. This is particularly striking in the study of religion and psychosis, where we and others have shown that cultural context determines both the structure and content of hallucination-like events. The cultural shaping of hallucinations may provide a rich case-study for linking cultural learning with emerging prediction-based models of perception.

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