Diversity and Systematics of Limbless Skinks (Anomalopus) from Eastern Australia and the Skeletal Changes that Accompany the Substrate Swimming Body Form

2021 ◽  
Vol 55 (4) ◽  
Author(s):  
Mark N. Hutchinson ◽  
Patrick Couper ◽  
Andrew Amey ◽  
Jessica Worthington Wilmer
Keyword(s):  
Body Form ◽  
Skeletal Changes ◽  
Eastern Australia

Diabetes and osteoporosis

2011 ◽  
Vol 152 (29) ◽  
pp. 1161-1166 ◽  
Author(s):  
Zsuzsanna Valkusz
Keyword(s):  
Vitamin D ◽  
Type 1 Diabetes ◽  
Bone Mass ◽  
Fragility Fractures ◽  
Vitamin D Supplementation ◽  
Bone Collagen ◽  
Skeletal Changes ◽  
Glucagon Like Peptide 1 ◽  
Bone Quantity

Over the last decades a considerable amount of data has accumulated to indicate that metabolic and endocrine alterations of diabetes affect bone quantity and quality. These skeletal changes may increase the risk of bone fracture. There is strong evidence that in type 1 diabetes the decreased bone mass, lack of insulin and insulin-like growth factor-1, dysregulation of adipokines, and increased levels of proinflammatory cytokines are in the background of fragility fractures. In type 2 diabetes hyperinsulinemia, insulin resistance and increased body weight may result in an increase of bone mass; however, accumulation of advanced glycation end products within the bone collagen driven by glucotoxicity may increase the cortical porosity. There is a higher incidence of falls resulting from diabetes-related co-morbidities such as diabetic retinopathy, peripheral neuropathy, hypoglycemic episodes and sometimes from the medications. Vitamin D deficiency has special impact on glucose metabolism and the prevalence of diabetes. Vitamin D supplementation in childhood can decrease incidence of type 1 diabetes by 80%. The effect of thiazolidinediones, glucagon-like peptide-1 agonists and metformin, agents for treatment of diabetes open a new connection between bone, carbohydrate and fat metabolism. Orv. Hetil., 2011, 152, 1161–1166.

Constraints on the vertical motion of eastern Australia during the Mesozoic

1994 ◽  
Vol 6 (2-3) ◽  
pp. 77-94 ◽  
Author(s):  
KERRY Gallagher ◽  
TREVOR A. Dumitru ◽  
ANDREW J. W. Gleadow
Keyword(s):  
Vertical Motion ◽  
Eastern Australia

scholarly journals Linking population size structure, heat stress and bleaching responses in a subtropical endemic coral

Coral Reefs ◽  
2021 ◽  
Author(s):  
Liam Lachs ◽  
Brigitte Sommer ◽  
James Cant ◽  
Jessica M. Hodge ◽  
Hamish A. Malcolm ◽  
...  
Keyword(s):  
Heat Stress ◽  
Size Structure ◽  
Temporal Trends ◽  
Early Recovery ◽  
Size Frequency Distribution ◽  
Frequency Distributions ◽  
Community Organisation ◽  
Size Frequency ◽  
Eastern Australia

AbstractAnthropocene coral reefs are faced with increasingly severe marine heatwaves and mass coral bleaching mortality events. The ensuing demographic changes to coral assemblages can have long-term impacts on reef community organisation. Thus, understanding the dynamics of subtropical scleractinian coral populations is essential to predict their recovery or extinction post-disturbance. Here we present a 10-yr demographic assessment of a subtropical endemic coral, Pocillopora aliciae (Schmidt-Roach et al. in Zootaxa 3626:576–582, 2013) from the Solitary Islands Marine Park, eastern Australia, paired with long-term temperature records. These coral populations are regularly affected by storms, undergo seasonal thermal variability, and are increasingly impacted by severe marine heatwaves. We examined the demographic processes governing the persistence of these populations using inference from size-frequency distributions based on log-transformed planar area measurements of 7196 coral colonies. Specifically, the size-frequency distribution mean, coefficient of variation, skewness, kurtosis, and coral density were applied to describe population dynamics. Generalised Linear Mixed Effects Models were used to determine temporal trends and test demographic responses to heat stress. Temporal variation in size-frequency distributions revealed various population processes, from recruitment pulses and cohort growth, to bleaching impacts and temperature dependencies. Sporadic recruitment pulses likely support population persistence, illustrated in 2010 by strong positively skewed size-frequency distributions and the highest density of juvenile corals measured during the study. Increasing mean colony size over the following 6 yr indicates further cohort growth of these recruits. Severe heat stress in 2016 resulted in mass bleaching mortality and a 51% decline in coral density. Moderate heat stress in the following years was associated with suppressed P. aliciae recruitment and a lack of early recovery, marked by an exponential decrease of juvenile density (i.e. recruitment) with increasing heat stress. Here, population reliance on sporadic recruitment and susceptibility to heat stress underpin the vulnerability of subtropical coral assemblages to climate change.

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