Size structure of the coral Stylophora pistillata across reef flat zones in the central Red Sea.

Demographic analyses offer insight into the state of a population. Here, we surveyed different reef flat zones (exposed, midreef and sheltered) of six reefs over a cross-shelf gradient to characterize the population structure of Stylophora pistillata, a coral species which dominates reef flats in the central Red Sea. Phototransects were conducted at each reef flat zone, and the density of S. pistillata, the planar area of each colony, and the occurrence of partial mortality were calculated using the program ImageJ. Each colony was also assigned a color morph (yellow, purple or mixed colors). Density and mean size were extremely variable, both among reef flat zones and reefs, but overall, both metrics were lower on the midshelf reefs. The yellow color morph accounted for nearly 90% of colonies surveyed and dominated most reef flats assessed, with the exception of one site where 81% of colonies were purple morphs. There were no spatial trends in the percentage of colonies suffering partial mortality, but overall there is a positive correlation with size class and proportion of colonies with partial mortality. Despite few trends emerging from assessing individual parameters, a PERMANOVA analysis revealed differences among reef flat zones in most of the reefs, highlighting the importance of multivariate analysis. The data presented here serve as a baseline for monitoring and may identify possible future demographic changes to this important coral species in a region increasingly affected by bleaching events.

The EffectiveNess of LIfestyle with Diet and Physical Activity Education ProGram Among Prehypertensives and Stage 1 HyperTENsives in an Urban Community Setting (ENLIGHTEN) Study.

This study aims to determine the effectiveness of a monthly lifestyle education program, which included advice on nutritional changes and physical activity enhancement in the reduction of blood pressure and selected biochemical and anthropometric parameters among pre-hypertensive and stage 1 hypertensive participants in Manila, Philippines. Participants resided in two barangays (districts), in Manila, Philippines, and each barangay was assigned to either the intervention or attention-control group. The intervention group received monthly lectures on cardiovascular disease and organized classes on diet and exercise, while the attention-control group received monthly lectures on non-cardiovascular topics, with verbal advice that healthy diet and exercise are important. The primary outcome was systolic blood pressure, with secondary outcomes of BMI, waist circumference, and laboratory measures. Linear mixed effects models with an interaction between intervention group and time were used to estimate the 6-month change in each group. At 6 months, systolic blood pressure was lower in the intervention group compared to the attention-control group (- 12.7 mmHg (95% CI [- 14.5, - 10.9]) vs. - 0.24 mmHg (95% CI [- 1.87, 1.43]), p-value < 0.001). Waist circumference (p < 0.001), BMI (p < 0.001), and total cholesterol (p = 0.049) were also lower. However, no statistically significant difference in fasting glucose was observed between the two groups (p = 0.740). This study showed that participants receiving a non-pharmacological intervention, specifically a low-cost diet and active lifestyle education program, experienced a greater decrease in blood pressure, BMI, waist circumference, and total cholesterol than the attention-control group. Educational programs such as in ENLIGHTEN show promise for a developing country with limited resources to improve hypertension levels, and ultimately cardiovascular health. ENLIGHTEN deserves further study in randomized trials.