Moose, caribou, and fire: have we got it right yet?

Canadian Journal of Zoology, e-First Articles. Natural disturbance plays a key role in shaping community dynamics. Within Canadian boreal forests, the dominant form of natural disturbance is fire, and its effects are thought to influence the dynamics between moose (Alces alces (Linnaeus, 1758)) and the boreal ecotype of woodland caribou (Rangifer tarandus caribou (Gmelin, 1788)). Boreal caribou are considered “threatened” and population declines are attributed, at least in part, to disturbance-mediated apparent competition (DMAC) with moose. Here, we tested a primary prediction of the DMAC hypothesis: that moose respond positively to burns within and adjacent to the caribou range. We assessed moose s election for ≤25-year-old burns (when selection is predicted to be strongest) at multiple spatial scales and evaluated whether moose density was correlated with the extent of ≤40-year-old burns (a time frame predicted to negatively affect caribou). Against expectation, moose showed avoidance and low use of ≤25-year-old burns at all scales, regardless of burn age, season, and type of land cover burned. These findings mirrored the demographic response, as we found no correlation between ≤40-year-old burns and moose density. By contradicting the prevailing hypothesis linking fires to cari bou population declines, our results highlight the need to understand regional variation in disturbance impacts on caribou populations.
Source: Canadian Journal of Zoology - Category: Zoology Authors: Source Type: research

Related Links:

In this study, the fluoride concentration in medicinal plants was determined in a range from 0.25 to 250 µg g-1. Fluoride was determined using potentiometry with ion-selective electrode (ISE) after sample preparation. Sample masses ranging from 0.1 to 1.0 g were pressed into pellets and burned using the microwave-induced combustion (MIC) method. After combustion, fluoride was absorbed in diluted ammonia for further determination by using ISE. Recoveries close to 100% were obtained with a low relative standard deviation (5%), using 20 bar of oxygen and 5 min of reflux. Solutions obtained us...
Source: Journal of Fluorine Chemistry - Category: Chemistry Source Type: research
BACKGROUND: There is a paucity of human data on exposure to blast traumatic brain injury (bTBI) and the corresponding systemic cytokine immune response at later time points (i.e., months, years) post-injury. METHODS: We conducted a repeated measure...
Source: SafetyLit - Category: International Medicine & Public Health Tags: Burns, Electricity, Explosions, Fire, Scalds Source Type: news
Severely burned and non-burned trauma patients are at risk for acute kidney injury (AKI). The study objective was to assess the theoretical performance of artificial intelligence (AI)/machine learning (ML) algorithms to augment AKI recognition using the no...
Source: SafetyLit - Category: International Medicine & Public Health Tags: Burns, Electricity, Explosions, Fire, Scalds Source Type: news
Sudden release of energy in an explosion creates craters in granular media. In comparison with well-studied impact cratering in granular media, our understanding of explosion cratering is still primitive. Here, we study low-energy lab-scale explosion crate...
Source: SafetyLit - Category: International Medicine & Public Health Tags: Burns, Electricity, Explosions, Fire, Scalds Source Type: news
BACKGROUND: Wildfire events are increasing in prevalence in the western United States. Research has found mixed results on the degree to which exposure to wildfire smoke is associated with an increased risk of mortality. METHODS: We tested for an a...
Source: SafetyLit - Category: International Medicine & Public Health Tags: Burns, Electricity, Explosions, Fire, Scalds Source Type: news
In a video last month, a North Carolina woman shared a tip about battling “stupid charges.” Thousands responded — some in gratitude, others to commiserate over the baffling costs of health care.
Source: NYT Health - Category: Consumer Health News Authors: Tags: Debt Collection Social Media Health Insurance and Managed Care Emergency Medical Treatment North Carolina Prices (Fares, Fees and Rates) Burns, Shaunna TikTok (ByteDance) Source Type: news
The last man that used the words “I love you” used them to control me.  He used them by not saying it back, ever, when I said it.  He used them by smugly making me say it when he wanted to hear it.  He used them by only ever saying them himself when I would work up the strength to try to end things.   He used them to make me feel bad when I didn’t “behave” how he wanted me to.  He used them to convince me of a false future that he had no intention of ever providing.  The words “I love you” meant absolutely nothing. They were alternately a crowba...
Source: Psych Central - Category: Psychiatry Authors: Tags: Addictions Codependence Narcissism Personal Stories Relationships & Love Addiction Recovery Alcoholism Breakups Emotional Abuse Substance Abuse Source Type: news
In this study, 1H nuclear magnetic resonance spectroscopy (1H-NMR) was used to examine the effects of glutamine on plasma metabolites in burned rats and to explore the underlying mechanisms. After burn injury, the rats exhibited significant increases in resting energy expenditure (REE) and hypercatabolism, and anabolism was inhibited. The levels of metabolites that reflect the proteolysis of skeletal muscle, such as alanine, histidine, leucine, valine, 3-methylhistidine and creatine, were significantly increased. In addition, the burned rats exhibited energy synthesis dysfunction, as evidenced by a decrease in the ATP conc...
Source: American Journal of Translational Research - Category: Research Tags: Am J Transl Res Source Type: research
This study aimed to assess inequality in the distribution of burn...
Source: SafetyLit - Category: International Medicine & Public Health Tags: Burns, Electricity, Explosions, Fire, Scalds Source Type: news
Narcolepsy is a rare brain disorder characterized by excessive daytime sleepiness (EDS), cataplexy, hypnagogic hallucinations, and sleep paralysis. Stimulants have been used to relieve the symptoms of EDS. Narcolepsy symptoms may pose a risk to burn injury...
Source: SafetyLit - Category: International Medicine & Public Health Tags: Burns, Electricity, Explosions, Fire, Scalds Source Type: news
More News: Burns | Canada Health | Zoology