Sentence examples for persistent concerning from inspiring English sources

The simplified conceptualization of forest succession as a directional deterministic process, starting from "bare ground" has been particularly persistent concerning the boreal forest, where stand-replacing fire has traditionally been regarded as the 'norm disturbance' (Fig. 1, Payette 1992; Bergeron et al. 2002).

One, most persistent, concerns the relationship between nature and culture animals and their behavior in the wild, humans and their behavior in societies, and the inevitable link between them.

Underemployment is a persistent concern among industrial workers.

With persistent concerns about terrorism, cruise lines have adjusted itineraries, most notably bypassing the Suez Canal.

Energy stocks were up, as well, on persistent concerns about fuel costs as winter approaches.

The United States trade deficit has been a persistent concern for years, of course.

Persistent concerns about a slowing economy also weighed on the broader market.

But as time has passed, industry experts say, the persistent concern is location, not altitude.

One persistent concern among women and adolescents is the causal link between oral contraceptives and breast cancer.

The experience of such systems worldwide simply doesn't support that hypothesis, yet it remains a persistent concern.

Mental health problems are a persistent concern – particularly widespread are incidences of depression, anxiety and post traumatic stress disorder.