Researchers say the finding suggests a warming climate could be affecting bird growth in North America - and across the world.可知,一项新的研究发现,过去40年来,北美候鸟的体型一直在变小。研究人员表示,这一发现表明,气候变暖可能会影响北美乃至全世界的鸟类生长。所以短文的最佳标题为“气候变暖影响鸟类的...
AnewstudyhasfoundthatNorthAmericanmigratorybirdshavebeengettingsmalleroverthepast40years.ResearchersbelievethefindingsuggestsawarningclimatecouldbeaffectingbirdgrowthinNorthAmerica-andacrosstheworld.ThestudywaspublishedinEcologyLetters.Itinvolveddataonnearly80,000birdskilledfrom1978to2016inthecityofChicago,Illinois.Researcher...
migrations. Fifty-two species of birds were studied. Most were different kinds of songbirds. These birds reproduce in cold areas of North America and spend their winters in areas south of Chicago. Over the 40-year period, body size decreased in all 52 species. The average body mass fell by...
5A new study has found that North American migratory(迁徏的) birds have been getting smaller over the past 40 years. Researchers say the finding suggests a warming climate(气候)could be affecting bird growth in North America -- and across the world. The study was recently published in Ecology...
has found that North American migratory(迁徏的) birds have been getting smaller over the past 40 years. Researchers say the finding suggests a warming climate(气候)could be affecting bird growth in North America -- and ...
1. 阅读理解 A new study has found that North American migratory(迁徏的) birds have been getting smaller over the past 40 years. Researchers say the finding suggests a warming climate(气候)could be affecting bird growth in North America -- and across the world. The study was recently publi...
Migratory birds of prey may therefore be particularly vulnerable to climate change because: 1) most are long-lived and have relatively low reproductive capacity, 2) many feed predominately on insectivorous passerines, and 3) several undertake annual migrations totaling tens of thousands of kilometers...
Knowing when these small birds make their seasonal movements can help backyard birders be prepared to welcome them to and from their yards.Even though hummingbirds are the smallest birds in the world,their migrations can span hundreds or thousands of miles. While there are more than 300 humming...
A. et al. Global change and the distributional dynamics of migratory bird populations wintering in Central America. Glob. Change Biol. 23, 5284–5296 (2017). Article Google Scholar Bringi, V. N. & Chandrasekar, V. Polarimetric Doppler Weather Radar (Cambridge Univ. Press, Cambridge, 2001)...
The team also examined 10 years' worth of data from a network of 143 weather radars, which pick up bird migrations, and found a reduction in migratory biomass of about 14 percent since 2007. "Two completely different and independent monitoring techniques thus signal major population loss across ...