Plunging floater survival causes cryptic population decline in the Common Loon [0.03%]
潜水觅食行为导致的普通潜鸟隐秘种群下降现象
Walter H Piper,Jason Grear,Brian Hoover et al.
Walter H Piper et al.
Populations of many vertebrates are declining and geographic ranges contracting, largely as a consequence of anthropogenic threats. Many reports of such decline, however, lack the breadth and detail to narrow down its causes. Here we descri...
Feather mercury increases with feeding at higher trophic levels in two species of migrant raptors, Merlin (Falco columbarius) and Sharp-shinned Hawk (Accipiter striatus) [0.03%]
两种迁徙猛禽——红尾鹰和sharp-shinned hawk的食性越高级其羽毛中的汞含量也越高
Edward R Keyel,Matthew A Etterson,Gerald J Niemi et al.
Edward R Keyel et al.
Mercury (Hg) is a toxic heavy metal that, when methylated to form methylmercury (MeHg), bioaccumulates in exposed animals and biomagnifies through food webs. The purpose of this study was to assess Hg concentrations in raptors migrating thr...
Birds suppress pests in corn but release them in soybean crops within a mixed prairie/agriculture system [0.03%]
在混合草原/农业系统中鸟类在玉米地压制害虫但在大豆地释放害虫
Megan B Garfinkel,Emily S Minor,Christopher J Whelan
Megan B Garfinkel
Birds provide ecosystem services (pest control) in many agroecosystems and have neutral or negative ecological effects (disservices) in others. Large-scale, conventional row crop agriculture is extremely widespread globally, yet few studies...
MIGRATION PATTERNS, USE OF STOPOVER AREAS, AND AUSTRAL SUMMER MOVEMENTS OF SWAINSON'S HAWKS [0.03%]
斯温霍氏
Michael N Kochert,Mark R Fuller,Linda S Schueck et al.
Michael N Kochert et al.
From 1995-1998, we tracked movements of adult Swainson's Hawks (Buteo swainsoni) using satellite telemetry to characterize migration, important stopover areas, and austral summer movements. We tagged 46 hawks from July - September on their ...
LIMITED GEOGRAPHIC VARIATION IN THE VOCALIZATIONS OF THE ENDANGERED THICK-BILLED PARROT: IMPLICATIONS FOR CONSERVATION STRATEGIES [0.03%]
珍稀厚嘴鹦鹉鸣声的地理变化有限及其对保护策略的意义
Jaime E Guerra,Javier Cruz-Nieto,Sonia Gabriela Ortiz-Maciel et al.
Jaime E Guerra et al.
The populations of many species are declining worldwide, and conservation efforts struggle to keep pace with extinction rates. Conservation biologists commonly employ strategies such as translocation and reintroduction, which move individua...
Sarah S Wheeler,Christopher M Barker,Ying Fang et al.
Sarah S Wheeler et al.
The strain of West Nile virus (WNV) currently epidemic in North America contains a genetic mutation elevating its virulence in birds, especially species in the family Corvidae. Although dead American Crows (Corvus brachyrhynchos) have been ...