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Species extinctions have defined the global biodiversity crisis, but extinction begins with loss in abundance of individuals that can result in compositional and functional changes of ecosystems. Using multiple and independent monitoring networks, we report population losses across much of the North American avifauna over 48 years, including once-common species and from most biomes. Integration of range-wide population trajectories and size estimates indicates a net loss approaching 3 billion birds, or 29% of 1970 abundance. A continent-wide weather radar network also reveals a similarly steep decline in biomass passage of migrating birds over a recent 10-year period. This loss of bird abundance signals an urgent need to address threats to avert future avifaunal collapse and associated loss of ecosystem integrity, function, and services.
This article was published in the following journal.
Name: Science (New York, N.Y.)
Population declines have been documented in approximately one-third of bumble bee species. Certain drivers of these declines are known; however, less is known about the interspecific trait differences...
European and North American guidelines recommend Y-chromosome microdeletion (YCM) screening in azoospermic and oligozoospermic men with sperm concentrations of 1 million sperm/ml.
We prospectively followed a cohort of unaffected relatives of Indigenous North American (INA) people with RA to define the incidence of inflammatory arthritis (IA) and autoantibody prevalence in this ...
Bullying behavior is a concern among school-aged youth and anti-bullying programs have been implemented in schools throughout North America. Most anti-bullying programs are delivered to adolescent you...
To determine the effect of North American ginseng on blood pressure in individuals with hypertension.
The North American ACS Reflective III Pilot is an observational, Quality Enhancement Research Initiative (QuERI), knowledge translation program designed to give feedback to physicians on t...
This is an initial validation study of the Personal Nutrition Project (PNP) algorithm in a North American population with recently diagnosed Type 2 Diabetes (T2D). This is a 2-stage, singl...
The North American Scapula Consortium (NASCon) is a multi-center injury specific outcomes registry. There currently exists a paucity of outcomes data in the literature on this patient ...
Gastric cancer has an incidence in North America of over 24,000 new cases annually, of which approximately 15% are diagnosed at an early stage. Standard of care for early gastric cancer (E...
Individual members of North American ethnic groups with ancient historic ancestral origins in Asia.
A competitive team sport played on a rectangular field. This is the American or Canadian version of the game and also includes the form known as rugby. It does not include non-North American football (= SOCCER).
A plant genus of the family ARISTOLOCHIACEAE which was used medicinally by North American Indians. The common name of 'snakeroot' is also used for many other plants, including SANICULA; or ARISTOLOCHIA; or Polygala.
A family of North American freshwater CATFISHES. It consists of four genera (Ameiurus, Ictalurus, Noturus, Pylodictis,) comprising several species, two of which are eyeless.
An arthropod subclass (Xiphosura) comprising the North American (Limulus) and Asiatic (Tachypleus) genera of horseshoe crabs.