ISSN 2094-2818

Editors: Eduardo A. Padlan and
Gisela P. Padilla-Concepcion
VOLUME 7 NUMBER 1 (January to June 2014)
 


Phil. Sci. Lett. 2014 7 (1) 55-61
available online: March 1, 2014

*Corresponding author
Email Address: bmvallejo@upd.edu.ph
Received: September 18, 2013
Revised: January 3, 2014
Accepted: January 12, 2014
Published: March 1, 2014
Editor-in-charge: Porfirio M. Aliņo

Keywords: bird communities, University of the Philippines, Metro Manila, landscape changes, urban ecology, population decline

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  ARTICLE
Responses of the bird community in the University of the Philippines Diliman after campus redevelopment and the decline of two common urban bird species


by Benjamin Vallejo, Jr* and Alexander B. Aloy

Institute of Environmental Science and Meteorology, College of Science
University of the Philippines, Diliman, Quezon City 1101, Philippines

The response of the bird community in the University of the Philippines Diliman Campus was evaluated before and after the university embarked on major infrastructure and landscape development in 2006-2008. Surveys using the Jokimäki walk were made monthly from 2004-2006 prior to development and from 2007-2010 after development in three 22-25 ha plots, i.e., 1) College of Science (CS), 2) Academic Oval (OV) and 3) Open Fields (OP), representing biophysical development gradient. Diversity indices before and after redevelopment were compared. Principal components analysis (PCA) and Ordinary least squares (OLS) regression were done to determine how the dominant species responded to change over time. The Eurasian Tree Sparrow Passer montanus and the Yellow vented bulbul Pycnonotus goiaiver experienced declines in all plots but most significantly in the CS plot which experienced the most infrastructure development. A MANOVA was used to determine if the declines in Passer and Pycnonotus populations had an effect on other species in the CS plot. MANOVA results suggest that the declines are significant with the increase in populations of the flycatcher Gerygone and the ground dove Geopelia suggesting ecological replacement of the once numerous species.