Iska Desmawati, 081141015 and Bambang Irawan, Dr and Sucipto Hariyanto, Dr. DEA (2014) Comparative study on distribution of conserved birds in open and vegetated area in Wonorejo, Surabaya. International Biological Conference 2014 . Biology Department Faculty of Mathematics and Natural Science Institut Teknologi Sepuluh Nopember Surabaya, Surabaya. ISBN 978-979-97316-3-0

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Abstract

Surabaya is one of the metropolitan city which have an Important Bird Area (IBA) namely Wonorejo, especifically for bird species conserved by Indonesian law. This research aimed to access the distribution and abiotic factor which influencing it. The research had been conducted on February to April 2013 in Wonorejo, Surabaya. Distribution study of conserved birds analyzed by Poisson distribution models and visual ilustration. Environmental factors affecting distribution were analyzed by RDA (Redundancy Analysis) with CANOCO for Windows 4.5. The results show that there are 20 species of conserved birds, which representing 9 families (Alcedinidae, Ardeidae, Scolopacidae, Laridae, Nectarinidae, Rhipiduridae, Charadriidae, Cuculidae and Recurvirostridae respectively). The distribution of conserved birds in Wonorejo are uneven on the overall area. The abiotic environmental factors in Wonorejo varies among areas with average temperatures ranging from 31- 33.50C, light penetration ranged between 6355-18877 lux and humidity ranges between 70-80. Profile of the sediments that make up the region of Wonorejo is dominated by sandy mud and deposits of biogenous sediment. From RDA diagram, it is known that environmental factor such as light penetration and humidity were not influencing the distribution of conserved birds. In contrast, temperature affects the distribution of birds conserved.

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