Oregon and Climate Change: The Age of Megafires in the American West

2021 ◽  
Vol 122 (3) ◽  
pp. 250-277
Author(s):  
William G. Robbins
Keyword(s):  
2018 ◽  
Vol 100 (4) ◽  
pp. 385-408
Author(s):  
Natale Zappia

This article explores Indigenous food exchange patterns prior to Afroeurasian colonization and continuing today. It calls for the application of historical inquiry into early foodways—production, consumption, exchange, ecological adaptation—in the quest for solutions to looming global challenges of food justice, climate change, health, population, etc.


Science ◽  
2021 ◽  
Vol 371 (6533) ◽  
pp. 1042-1045
Author(s):  
M. L. Forister ◽  
C. A. Halsch ◽  
C. C. Nice ◽  
J. A. Fordyce ◽  
T. E. Dilts ◽  
...  

Uncertainty remains regarding the role of anthropogenic climate change in declining insect populations, partly because our understanding of biotic response to climate is often complicated by habitat loss and degradation among other compounding stressors. We addressed this challenge by integrating expert and community scientist datasets that include decades of monitoring across more than 70 locations spanning the western United States. We found a 1.6% annual reduction in the number of individual butterflies observed over the past four decades, associated in particular with warming during fall months. The pervasive declines that we report advance our understanding of climate change impacts and suggest that a new approach is needed for butterfly conservation in the region, focused on suites of species with shared habitat or host associations.


2020 ◽  
Author(s):  
Avery Hill ◽  
Christopher Field

Abstract Due to climate change, plant populations experience environmental conditions to which they are not adapted. Our understanding of the next century’s vegetation geography depends on the distance, direction, and rate at which plants redistribute in response to a changing climate. Although plant redistribution in response to contemporary climate change is widely observed, our understanding of its mechanics is nascent. In this study we test the response of plant range shift rates to wildfire occurrence using 33,838 Forest Inventory Analysis plots across five states in the western United States. Wildfire increased the rate of observed range shifts for 6/8 tree species by more than 22% on average, suggesting that incumbent vegetation can act as a barrier to plant range shifts and that fire management may play an important role in facilitating transitions between vegetation types in response to climate change.


2019 ◽  
Vol 3 (6) ◽  
pp. 723-729
Author(s):  
Roslyn Gleadow ◽  
Jim Hanan ◽  
Alan Dorin

Food security and the sustainability of native ecosystems depends on plant-insect interactions in countless ways. Recently reported rapid and immense declines in insect numbers due to climate change, the use of pesticides and herbicides, the introduction of agricultural monocultures, and the destruction of insect native habitat, are all potential contributors to this grave situation. Some researchers are working towards a future where natural insect pollinators might be replaced with free-flying robotic bees, an ecologically problematic proposal. We argue instead that creating environments that are friendly to bees and exploring the use of other species for pollination and bio-control, particularly in non-European countries, are more ecologically sound approaches. The computer simulation of insect-plant interactions is a far more measured application of technology that may assist in managing, or averting, ‘Insect Armageddon' from both practical and ethical viewpoints.


2019 ◽  
Vol 3 (2) ◽  
pp. 221-231 ◽  
Author(s):  
Rebecca Millington ◽  
Peter M. Cox ◽  
Jonathan R. Moore ◽  
Gabriel Yvon-Durocher

Abstract We are in a period of relatively rapid climate change. This poses challenges for individual species and threatens the ecosystem services that humanity relies upon. Temperature is a key stressor. In a warming climate, individual organisms may be able to shift their thermal optima through phenotypic plasticity. However, such plasticity is unlikely to be sufficient over the coming centuries. Resilience to warming will also depend on how fast the distribution of traits that define a species can adapt through other methods, in particular through redistribution of the abundance of variants within the population and through genetic evolution. In this paper, we use a simple theoretical ‘trait diffusion’ model to explore how the resilience of a given species to climate change depends on the initial trait diversity (biodiversity), the trait diffusion rate (mutation rate), and the lifetime of the organism. We estimate theoretical dangerous rates of continuous global warming that would exceed the ability of a species to adapt through trait diffusion, and therefore lead to a collapse in the overall productivity of the species. As the rate of adaptation through intraspecies competition and genetic evolution decreases with species lifetime, we find critical rates of change that also depend fundamentally on lifetime. Dangerous rates of warming vary from 1°C per lifetime (at low trait diffusion rate) to 8°C per lifetime (at high trait diffusion rate). We conclude that rapid climate change is liable to favour short-lived organisms (e.g. microbes) rather than longer-lived organisms (e.g. trees).


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