Carbon, oxygen, and strontium isotopic fingerprint in Neoproterozoic to early Cambrian limestones in an active margin setting: A record of local environment or global changes?

2022 ◽  
Vol 370 ◽  
pp. 106538
Author(s):  
Lukáš Ackerman ◽  
Jiří Žák ◽  
Karel Žák ◽  
Jan Pašava ◽  
Václav Kachlík ◽  
...  
Keyword(s):  
Local Environment ◽  
Global Changes ◽  
Early Cambrian ◽  
Active Margin ◽  
Margin Setting

Foreseeable Effects of Nuclear Detonations on a Local Environment: Boulder County, Colorado

1984 ◽  
Vol 11 (2) ◽  
pp. 155-165 ◽  
Author(s):  
Jeffrey O. Bennett ◽  
Patricia S.C. Johnson ◽  
Jeffrey R. Key ◽  
Douglas C. Pattie ◽  
Alan H. Taylor
Keyword(s):  
Synergistic Effects ◽  
Local Environment ◽  
Human Consumption ◽  
Global Changes ◽  
Agricultural Crops ◽  
Nuclear War ◽  
Boulder County ◽  
Environmental Systems ◽  
Recovery Times ◽  
Made In

The effects on Boulder County, Colorado, of a major nuclear war are predicted. Although many of the effects of such a horrific event would be global in nature, the direct ones on Boulder County were considered in terms of being primarily due to three one-megaton blasts in Denver, situated 40 km to the south-east. Under assumed wind conditions, agricultural crops would be contaminated with radionuclides for prolonged periods, rendering them dangerous for human consumption. Loss of animal life, flooding, increased sedimentation, and extensive soil-erosion, should also be expected. Recovery times for environmental systems are difficult to predict. Indeed, unknown synergistic effects and global changes in atmospheric conditons might preclude eventual recovery.Although numerous assumptions were made in these predictions, and the impacts described are scenario-dependent, the implications are clear: even if Boulder County received no direct hit, a nuclear war would have a devastating impact on the environmental systems that were considered.The prognosis from this study and others for human societies and involved ecosystems in the event of nuclear war is grim. We hope that continued research and dignified publicity of results on the effects of nuclear war will increase the urgency with which solutions to the nuclear dilemma are sought.

scholarly journals Ecotypic changes of alpine birds to climate change

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Maria del Mar Delgado ◽  
Chiara Bettega ◽  
Jochen Martens ◽  
Martin Päckert
Keyword(s):  
Climate Change ◽  
Local Environment ◽  
Global Changes ◽  
Tarsus Length ◽  
Closely Related Species ◽  
Pertinent Question ◽  
Long Time ◽  
Environmental Variations ◽  
Gloger’S Rule ◽  
Increasing Temperature

Abstract In endotherm animals, several traits are related to climate. For example, Bergmann’s rule predicts a decrease in body size within species and across closely related species with increasing temperature, whereas Gloger’s rule states that birds and mammals should be darker in humid and warm environments compared to colder and drier areas. However, it is still not clear whether ecotypic responses to variation in the local environment can also apply to morphological and colouration changes through time in response to climate change. We present a 100-year-long time series on morphological and melanin-based colours of snowfinch (325 Montifringilla, 92 Pyrgilauda and 30 Onychostruthus) museum specimens. Here we show that the tarsus length of the species has decreased and the saturation of the melanin-based colour has increased, which was correlated with the increase of temperature and precipitations. As ecotypic variations are tightly linked to individual behavioural and physiological responses to environmental variations, differently sized and coloured individuals are expected to be differently penalized by global changes. This study opens the pertinent question about whether ecotypic responses can enhance population persistence in the context of global change.

scholarly journals Petrology and geochemistry of metapelites from Asenitsa unit, Central Rhodope massif

2021 ◽  
Vol 82 (3) ◽  
pp. 55-57
Author(s):  
Milena Georgieva
Keyword(s):  
Trace Elements ◽  
Trace Element ◽  
Trace Element Composition ◽  
Element Composition ◽  
High Variability ◽  
Island Arc ◽  
Active Margin ◽  
Margin Setting ◽  
Bulk Chemical ◽  
Petrology And Geochemistry

Asenitsa unit metapelites (Central Rhodope massif) have a high variability in mineral, bulk chemical and trace element composition. Kyanite, staurolite and garnet are the major minerals in schists and show intensive retrograde change. Discrimination diagrams based on immobile trace elements indicate continental island arc or active margin setting of deposition.

scholarly journals Does global change increase the risk of maladaptation of Atlantic salmon migration through joint modifications of river temperature and discharge?

2021 ◽  
Vol 288 (1964) ◽  
Author(s):  
Elorri Arevalo ◽  
Anthony Maire ◽  
Stéphane Tétard ◽  
Etienne Prévost ◽  
Frédéric Lange ◽  
...  
Keyword(s):  
Global Change ◽  
Atlantic Salmon ◽  
Water Temperature ◽  
Aquatic Organisms ◽  
Local Environment ◽  
Freshwater Ecosystems ◽  
Global Changes ◽  
River Temperature ◽  
Salmon Juvenile ◽  
Key Events

In freshwater ecosystems, water temperature and discharge are two intrinsically associated triggers of key events in the life cycle of aquatic organisms such as the migration of diadromous fishes. However, global changes have already profoundly altered the thermal and hydrological regimes of rivers, affecting the timing of fish migration as well as the environmental conditions under which it occurs. In this study, we focused on Atlantic salmon ( Salmo salar ), an iconic diadromous species whose individuals migrate between marine nursery areas and continental spawning grounds. An innovative multivariate method was developed to analyse long-term datasets of daily water temperature, discharge and both salmon juvenile downstream and adult upstream migrations in three French rivers (the Bresle, Oir and Nivelle rivers). While all three rivers have gradually warmed over the last 35 years, changes in discharge have been very heterogeneous. Juveniles more frequently used warmer temperatures to migrate. Adults migrating a few weeks before spawning more frequently used warm temperatures associated with high discharges. This has already led to modifications in preferential niches of both life stages and suggests a potential mismatch between these populations' ecological preference and changes in their local environment due to global change.

scholarly journals Crustal thickening in an active margin setting (Philippines): The whys and the hows

Episodes ◽  
2004 ◽  
Vol 27 (4) ◽  
pp. 260-264 ◽  
Author(s):  
C.B. Dimalanta ◽  
G.P. Yumul Junior
Keyword(s):  
Crustal Thickening ◽  
Active Margin ◽  
Margin Setting

Morphology and structure of a landslide complex in an active margin setting: The Waitawhiti complex, North Island, New Zealand

Geomorphology ◽  
2009 ◽  
Vol 109 (3-4) ◽  
pp. 184-196 ◽  
Author(s):  
Aurélien Lacoste ◽  
Lies Loncke ◽  
Frank Chanier ◽  
Julien Bailleul ◽  
Bruno C. Vendeville ◽  
...  
Keyword(s):  
New Zealand ◽  
Active Margin ◽  
Margin Setting ◽  
Morphology And Structure
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