Climate warming and land-use changes drive broad-scale floristic changes in Southern Sweden

Land-use changes, pollution and climate warming during the 20th century have caused changes in biodiversity across the world. However, in many cases, the environmental drivers are poorly understood. To identify and rank the drivers currently causing broad-scale floristic changes in N Europe, we analysed data from two vascular plant surveys of 200 randomly selected 2.5 × 2.5 km grid-squares in Scania, southernmost Sweden, conducted 1989-2006 and 2008-2015, respectively, and related the change in frequency (performance) of the species to a wide range of species-specific plant traits. We chose traits representing all plausible drivers of recent floristic changes: climatic change (northern distribution limit, flowering time), land-use change (light requirement, response to grazing/mowing, response to soil disturbance), drainage (water requirement), acidification (pH optimum), nitrogen deposition and eutrophication (N requirement, N fixation ability, carnivory, parasitism, mycorrhizal associations), pollinator decline (mode of reproduction) and changes in CO₂ levels (photosynthetic pathway). Our results suggest that climate warming and changes in land-use were the main drivers of changes in the flora during the last decades. Climate warming appeared as the most influential driver, with northern distribution limit explaining 30%-60% of the variance in the GLMM models. However, the relative importance of the drivers differed among habitat types, with grassland species being affected the most by cessation of grazing/mowing and species of ruderal habitats by on-going concentration of both agriculture and human population to the most productive soils. For wetland species, only pH optimum was significantly related to species performance, possibly an effect of the increasing humification of acidic water bodies. An observed relative decline of mycorrhizal species may possibly be explained by decreasing nitrogen deposition resulting in less competition for phosphorus. We found no effect of shortage or decline of pollinating lepidopterans and bees.

Blood pressure and other cardiovascular risk factors among treated hypertensives in Swedish primary health care

OBJECTIVE

To evaluate antihypertensive treatment and other cardiovascular risk factors in primary health care.

DESIGN

Cross-sectional survey of consecutive patients with treated hypertension in 1999.

SETTING

17 primary care centres in Sweden.

SUBJECTS

512 patients (mean age 67; SD 11 years).

MAIN OUTCOME MEASURES

Antihypertensive treatment, cardiovascular risk factors.

RESULTS

Patients with high diastolic BP (> or = 100 mmHg) and systolic BP (> 180 mmHg) values were few. The proportions with diastolic BP < 90, BP < 160/95 and < 140/90 mmHg were 64%, 54% and 15%. Mono-therapy was given in 51%, and > or = 3 drugs in 13%. Hypertensives with hyperlipidaemia were 42%, and only 26% of them were given lipid-lowering drugs, mainly statins, 21%. Smokers were 10%, 23% had diabetes, and many had overweight BMI = 25 kg/m2, 72%.

CONCLUSION

Although two-thirds had diastolic BP < 90 mmHg, few had BP below the current treatment target < 140/90 mmHg. More than half of the hypertensives had at least one additional cardiovascular risk factor, and these hypertensives also had low proportions within several current treatment targets of hypertension and hyperlipidaemia, implying a need for intensified multiple risk factor intervention.