AVIS-IBIS

Birds of Indian Subcontinent

Changes in the Avifauna of the Hokkaido University Campus, Sapporo, Detected by a Long-Term Census

Publication Type:Journal Article
Year of Publication:2010
Authors:Namba, T, Yabuhara, Y, Yukinari, K, Kurosawa, R
Journal:Ornithological Science
Volume:9
Issue:1
Date Published:2010
ISBN Number:1347-0558
Keywords:Anas, Anas platyrhynchos, Anatidae, Apodidae, Chaetura caudacuta, Columbidae, Corvidae, Corvus, Corvus corone, Corvus macrorhynchos, Dendrocopos, Dendrocopos major, Emberiza, Emberiza godlewskii, Emberiza spodocephala, Emberizidae, Hirundapus, Hirundapus caudacuta, Hirundapus caudacutus, Laridae, Larus, Larus schistisagus, Ocyris spodocephala, Paridae, Parus, Parus major, Passer, Passer montanus, Passeridae, Picidae, Picoides major, Platyrhynchos, Salicipasser montanus, Streptopelia, Streptopelia orientalis, Streptopelia turtur
Abstract:Abstract We report the results of a 15-year bird census conducted on the Hokkaido University campus in Sapporo city. A standardized route census was carried out monthly by the students of the Hokkaido University Birding Club (HUBC). Bird species were classified according to their migratory status as: long-distance migrants (LDM), short-distance migrants (SDM), winter visitors (WV) and residents (R), Of a total of 88 species of birds identified, 18 were Rs, 21 LDMs, 26 SDMs and 10 WVs. The overall bird abundance for the R group was greatest, however this was strongly affected by fluctuations in the Eurasian Tree Sparrow Passer montanus population, representing more than half of the total bird abundance. This species declined sharply in 2006, and has not recovered yet. LDMs declined in both species richness and bird abundance, whereas SDMs and WVs had fluctuated annually in their abundance. Three major tendencies were detected by comparing nationwide changes of bird communities with those of the study site. 1) Overall population declines in the wintering and stopover grounds, which were aggravated by habitat degradation in the breeding grounds of the study site (White-throated Needletail Hirundapus caudacutus, Blackfaced Bunting Emberiza spodocephala, Oriental Turtle Dove Streptopelia orientalis), 2) Nationwide population increase while the population declined in the study site due to intensified management of vegetation (Great Tit Parus major, Great Spotted Woodpecker Dendrocopos major), 3) Population increases in species adapted or adapting to human landscapes (Large-billed Crow Corvus macrorhynchos, Mallard Anas platyrhynchos, Slaty-backed Gull Larus schistisagus). In addition, the drastic decline of Eurasian Tree Sparrows in early 2006 was caused by a local die-off event apparently due to an infectious disease. General recognition of the academic and conservation importance of a long-term census is hoped to enhance motivation for and efforts towards a census in various areas.Abstract We report the results of a 15-year bird census conducted on the Hokkaido University campus in Sapporo city. A standardized route census was carried out monthly by the students of the Hokkaido University Birding Club (HUBC). Bird species were classified according to their migratory status as: long-distance migrants (LDM), short-distance migrants (SDM), winter visitors (WV) and residents (R), Of a total of 88 species of birds identified, 18 were Rs, 21 LDMs, 26 SDMs and 10 WVs. The overall bird abundance for the R group was greatest, however this was strongly affected by fluctuations in the Eurasian Tree Sparrow Passer montanus population, representing more than half of the total bird abundance. This species declined sharply in 2006, and has not recovered yet. LDMs declined in both species richness and bird abundance, whereas SDMs and WVs had fluctuated annually in their abundance. Three major tendencies were detected by comparing nationwide changes of bird communities with those of the study site. 1) Overall population declines in the wintering and stopover grounds, which were aggravated by habitat degradation in the breeding grounds of the study site (White-throated Needletail Hirundapus caudacutus, Blackfaced Bunting Emberiza spodocephala, Oriental Turtle Dove Streptopelia orientalis), 2) Nationwide population increase while the population declined in the study site due to intensified management of vegetation (Great Tit Parus major, Great Spotted Woodpecker Dendrocopos major), 3) Population increases in species adapted or adapting to human landscapes (Large-billed Crow Corvus macrorhynchos, Mallard Anas platyrhynchos, Slaty-backed Gull Larus schistisagus). In addition, the drastic decline of Eurasian Tree Sparrows in early 2006 was caused by a local die-off event apparently due to an infectious disease. General recognition of the academic and conservation importance of a long-term census is hoped to enhance motivation for and efforts towards a census in various areas.
URL:http://dx.doi.org/10.2326/osj.9.37
Short Title:Ornithological Science
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith