Reducing Decay Losses in Hardwood Forests and Farm Woodlots

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Hepatocellular Carcinoma, Polymyositis, Rhabdomyolysis, and Acute Renal Failure

A 55 yr-old man presented with progressive muscle weakness and oliguria for 5days. Laboratory findings suggested rhabdomyolysis complicated with acute renal failure. A diagnosis of polymyositis was based upon the proximal muscle weakness on both upper and lower limbs, elevated muscle enzyme levels, muscle biopsy findings and the needle electromyography findings. The muscle biopsy showed extensive muscle necrosis and calcification. Investigations for underlying malignancy demonstrated hepatocellular carcinoma. The patient was managed with hemodialysis and high dose prednisolone. His renal function was fully recovered and his muscle power did improve slightly, but he died of a rupture of the hepatic tumor. In our view, this is an interesting case in that the hepatocellular carcinoma was associated with polymyositis and fulminant rhabdomyolysis-induced acute renal failure requiring hemodialysis

Density‑dependent winter survival of immatures in an irruptive raptor with pulsed breeding

Highly mobile predators can show strong numerical responses to pulsed resources, sometimes resulting in irruptions where large numbers of young invade landscapes at a continental scale. High production of young in irruption years may have a strong influence on the population dynamics unless immature survival is reduced compared to non-irruption years. This could occur if subordinate individuals (mainly immatures) are forced into suboptimal habitats due to density-dependent effects in irruption years. To test whether irruptive individuals had lower survival than non-irruptive ones, we combined necropsy results (N = 365) with telemetry (N = 185) from more than 20 years to record timing and causes of mortality in snowy owls (Bubo scandiacus), which irrupt into eastern North America during winter following high breeding output caused by lemming peaks in the Arctic. Mortality was more than four times higher in irruption years than non-irruption years, but only for immatures, and occurred disproportionately in early winter for immatures, but not adults. Mortality was also higher in eastern North America, where owl abundance fluctuates considerably between years, compared to core winter regions of the Arctic and Prairies where populations are more stable. Most mortality was not due to starvation, but rather associated with human activity, especially vehicle collisions. We conclude that immature snowy owls that irrupt into eastern North America are limited by density-dependent factors, such as increased competition forcing individuals to occupy risky human-altered habitats. For highly mobile, irruptive animals, resource pulses may have a limited impact on population dynamics due to low subsequent survival of breeding output during the nonbreeding season.publishedVersio

Exploring Lifelong Influence of Participating in the Junior Audubon Club During Childhood

There is limited research looking at the role that specific programs play in the formation of environmental identity, or lifelong influences of specific environmental programs. This study looks to address this gap by exploring the salient and memorable experiences of past Junior Audubon Club members who participated in the program as children, and how they describe the influences of the program on their environmental identities. Based on this study, there were specific components of the Junior Audubon Club that proved most influential and lasting for the participants, including active learning in nature, supportive adults who shared similar interest and passions, and establishment of a sense of community through social acceptance and group identity. This study suggests that childhood participation in programs can be particularly successful, and have a lasting impact, when a sense of community is created with peer acceptance, supportive adults, repeated experiences in nature and active learning. Findings from this study document the long-term impacts that participation in such a program as a child can have throughout an individual’s lifetime, and the results of this study can be applied to the development of potentially more impactful environmental education programs. The electronic version of this dissertation is accessible in the open access OhioLINK ETD Center (http://etd.ohiolink.edu)

Early 16th-Century Manuscripts at Piacenza: A Progress Report

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