Cladogenesis and morphological diversification in passerine birds

Article Abstract:

Multiple regressions are used to evaluate the effects of time and species number on morphological diversity within clades of passerine birds. The results shows that the number of species exerts a strong influence on morphological variance independent of time and thus morphological evolution in birds seems to be associated with cladogenesis.

Analysis, Passeriformes, Perching birds, Morphological variation

---

Leap of faith: how birds - and instinct - led the Pennsylvanians to Ecuador

Article Abstract:

A partnership has been formed between representatives from two Nature Conservancy sites, Pennsylvania's Poconos Mountains and Ecuador's Podocarpus National Park. Problems the partnership is addressing include deforestation, road construction, watershed degradation and threats to avian biodiversity.

Pennsylvania, Ecuador, Management, Planning, Protection and preservation, Forest management, National parks and reserves, National parks, Parks, Recreation leadership, Pocono Mountains

---

Chemical warfare for NYC's birds

Article Abstract:

A bill banning the use of Avitrol in New York, NY, was introduced in 1998 in response to growing concerns about its hazardous effects. The use of Avitrol to kill birds that are considered as pests in the city has done more harm than good, causing the deaths of other birds and mammals.

New York, New York, Environmental policy, Birds, Pesticides

Similar abstracts:

• Abstracts: Crystal cages for clean coolers. Localized vibrational modes in metallic solids. Carbon nano-cages created as cubes
• Abstracts: Genetics and elephant conservation. Negotiating for conservation. Remote sensing, geographic data and the conservation of biological resources
• Abstracts: Proliferation and muddle. A proliferation of programs. Bmk1/Erk5 is required for cell proliferation induced by epidermal growth factor
• Abstracts: Mechanism of the biological response to winter cooling in the northeastern Arabian Sea. Jurgen Aschoff (1913-98): Pioneer in biological rhythms
• Abstracts: Developmental basis of limblessness and axial patterning in snakes. A hormonal mechanism for parental favouritism

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.