Black-throated Blue Warbler - Status and Threats

Status and Threats

The black-throated blue warbler enjoys a large range and a big population. Its population trend is currently increasing. This species is ranked as Least Concern by the IUCN in 2012. Deforestation and habitat fragmentation are threatening the black-throated blue warblers in their tropical wintering areas. A report in 2000 discussed the impact of global climate change on the population dynamics of the black-throated blue warblers by an observation from 1986 to 1998. In particular, the effect of El Niño Southern Oscillation (ENSO) was studied in relation to the survival, fecundity and recruitment of this migratory bird. It was found that El Niño years (the warm oceanic phase) were associated with lower adult survival rate in their wintering ground, Jamaica, lower fecundity in the breeding habitats in New Hampshire of the United States, and lower annual recruitment of yearlings and juveniles to both breeding and wintering grounds. All the three factors were relatively higher during La Niña years when the weather was wetter and the food availability was much more abundant. The long-term global warming can aggravate the ENSO effect, adding to the fluctuation of the black-throated blue warbler population.

Read more about this topic:  Black-throated Blue Warbler

Famous quotes containing the words status and/or threats:

    [In early adolescence] she becomes acutely aware of herself as a being perceived by others, judged by others, though she herself is the harshest judge, quick to list her physical flaws, quick to undervalue and under-rate herself not only in terms of physical appearance but across a wide range of talents, capacities and even social status, whereas boys of the same age will cite their abilities, their talents and their social status pretty accurately.
    Terri Apter (20th century)

    Do not extort money from anyone by threats or false accusation, and be satisfied with your wages.
    Bible: New Testament, Luke 3:14.

    John the Baptist to Soldiers.