Regional Characteristics of Bird Community in Nakdong River Basin

Hong, Soon-Bok

doi:10.5141/jefb.2004.27.5.269

Cited by 12 publications

(3 citation statements)

References 2 publications

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“…For an analysis of the behavior of C. columbianus in Huangpi lake, located in the mid-to-lower oodplain area of the Yangtze River, Wang et al (2021) explored the behavioral patterns from early November to late February and found them moving to alternative habitats when the environment in a particular area deteriorated. Hong (2004;2009) conducted spatially separated surveys at the Nakdonggang River mouth and reported C. cygnus, which visited this place, to move locally according to environmental changes after the initial winter. Hahm and Kim (2001) inferred, from 1989 to 1999, that Cygnus spp.…”

Section: Population Changes Of Cygnus Sppmentioning

confidence: 99%

Decrease in population of swans (Cygnus spp.) due to the development of areas adjacent to the wintering site

Hong

Yeum

Kim³

et al. 2023

Wetlands Ecol Manage

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The aim of the present study was to investigate the relationship between Cygnus spp. population trends and land-use change and arti cial development activities in Nakdonggang estuary. Analysis of the 15year-long population change revealed a sharp decline of Cygnus columbianus population in winter, which could be attributed to the Nakdonggang estuary becoming unfeasible as their wintering site. In contrast, there was no sharp decline in the Cygnus cygnus population, although a moderate decline was identi ed. Over the past 30 years, farmland activities decreased by approximately 10% in the areas adjacent to the protected area, resulted from the growth of the urbanized area. The rate of decrease of water body area was evident, identi ed by the urban development through reclamation. Although the abundance of food resources for Cygnus spp. can only be understood indirectly, changes in land use around the wintering site, where the Cygnus spp. can acquire food, are expected to be decisive in their choice of habitat. C. cygnus and C. columbianus, whose individual characteristics have not been speci cally investigated, are generally known to share the same habitat; we could identify a distinct difference in terms of habitat sensitivity. With urban development occurring around the wintering site, C. columbianus was con rmed to be more sensitive to urbanization compared to C. cygnus in Nakdonggang estuary.

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Section: Population Changes Of Cygnus Sppmentioning

confidence: 99%

Decrease in population of swans (Cygnus spp.) due to the development of areas adjacent to the wintering site

Hong

Yeum

Kim³

et al. 2023

Wetlands Ecol Manage

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“…Development activities targeting mudflats and surrounding areas such as estuary bank construction, reclamation, housing development, and industrial complex formation after designation as natural monument reduced the area from 103,271,909 m 2 (adjusted in 2008) at the point of designation to 87,279,741 m 2 . Even after that, reclamation of Sinpyeong-Jangnim General Industrial Complex and Dadae-Myeongji area, new port construction, and Seobusan (western Busan) area development according to designation of Free Economic Zone all reduced the feeding and resting places for winter migratory birds (Hong, 2004a(Hong, , 2004bHur et al, 1999) to review the impact on wildlife inhabitation.…”

Section: Overview Of Research Sitesmentioning

confidence: 99%

Analyzing the Effect of River Ecosystem Fragmentation by Bridges on Changes in the Wintering Population of Whooper Swans (<italic>Cygnus cygnus</italic>): Targeting the Nakdong River, Busan

Lee

Cho

et al. 2022

J. People Plants Environ

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Background and objective: Fragmentation of river ecosystems is expected to affect biodiversity loss, but bridge construction is proceeding without consideration in urban areas. This study was conducted to determine the effect of internal environmental factors and river ecosystem fragmentation caused by bridge construction on the population of wintering whooper swans (<i>Cygnus cygnus</i>) in the Nakdong River of Busan Metropolitan City, a key wintering site for whooper swans.Methods: To compare the wintering population according to the distance between bridges, we surveyed and analyzed the current status of the population by period, distance between bridges, and land cover. One-way ANOVA and post-hoc test were conducted to confirm whether the differences in the environmental factors of the wintering sites, such as the distance between bridges, land cover status, and the number of wintering individuals, were statistically significant.Results: 83.6-94.7% of the wintering population in the lower Nakdong River were observed in Sec. 2 (Nakdong River Estuary Bank-Seobusan Nakdong River Bridge, 5.3 km) and Sec.4 (Gamjeon-Iron Bridge-Nakdong River Hwaengdansugwan Bridge, 3.6 km). As for the distance between the feeding and resting places of whooper swans and the bridges, whooper swans used the waterside and wetlands at an average distance of 1,147.5 m (10.9-2,611.2 m) from the bridge.Conclusion: Considering the weight of male swans and the presence of young individuals, as well as disturbance factors such as the noise and speed of vehicles crossing the bridges, it is necessary to maintain at least a 4 km distance between bridges for stable wintering. In addition, since fragmentation of river ecosystems has been confirmed to have an adverse effect on biodiversity, it would be desirable to keep the ecosystem intact and connected.

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“…하굿둑 내측은 영양염 농도와 체류시간이 증가하였고 (Jeong et al, 2007), 겨울철 체류시간과 무기 영양염의 증가로 인한 클로로필 증가 (Song et al, 2000) (Shin et al, 1998), 부영양화의 지시자 인 Chl-a의 농도에 관한 연구 (Shin et al, 2002), 장마기 탁도의 증가와 체류시간의 감소로 인해 Chl-a, TP, TN의 농도 감소 및 수질 향상을 제시한 연구 (BDI, 2004), 낙동강 플랑크톤 군집 동태에 관한 연구 (Chung et al, 2013), 조류 분포에 관한 연구 (Hong, 2003;Hong, 2004;Oh et al, 2008), 식생분포에 관한 연구 (Lee and An, 2012;BDI 2001BDI , 2002BDI , 2003BDI , 2004BDI , 2005BDI , 2006, 지형변화에 관한 연구 (Lee et al, 2008;Oh et al, 2010) (2000), Shin et al(1995Shin et al( , 1996Shin et al( , 1998Shin et al( , 2002, BDI(2001BDI( , 2002BDI( , 2003BDI( , 2004, MOE Beukema, 1976;Boesch, 1977;Carriker, 1967;Gray, 1974;Holland et al, 1987;Mannino and Montagna, 1997;Sanders et al, 1965;Teske and Wooldridge, 2003). 그 중에서 많은 연구에서 염분이 하구에서 대형저서동물군집에 더 중요한 환경 요인으로 작용한다는 것을 확인하였다 (Carriker, 1967;Holland et al, 1987;Wolff, 1983 …”

Section: 낙동강 하구는 낙동강 유역의 하단부로 낙동강 본류 수질의 영향을 받고 있으나 하굿둑 건설 이후 내 외측의 unclassified

Study on the Long-term Changes in Water Quality and Benthic Ecology and Evaluation on Effect of the Barrage in Nakdong River Estuary

Park¹,

Lee²,

Choi

et al. 2016

Journal of Wetlands Research

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This study was performed to investigate the long-term changes in water quality and benthic ecology around the Nakdong River Estuary. The effect of the estuarine barrage on the ecosystem was also evaluated. The water quality was interpreted using the field survey (2013 and 2014) and monitoring data (MOE, 1989~2013) and the macrobenthic-fauna was investigated through analysis of the field survey data (2014) and literatures review (1985~2013). The long-term variation of water quality of Nakdong River generally showed increased nutrient concentration with decreased discharge, while abrupt influence of the barrage construction was not observed. However, the nutrient and organic matter concentration inside the barrage distinctly was higher than the concentration outside the barrage because the mixing of fresh and seawater was limited by the barrage. Especially, in the period of low discharge during winter, the Chlorophyll-a concentration clearly increased more in the downstream inside the barrage, showing the barrage effect. In other words, stagnant effect caused by barrage construction had an effect on the water quality degradation in dry seasons. As for the benthic ecology inside barrage after barrage construction, molluscans and brackish-water crustaceans disappeared. Outside the barrage, benthic ecosystem has deteriorated and the small-sized organic indicative species like Prionospio membranacea, Pseudopolydora kempi, Sinocorophium sinensis became dominant due to several construction such as Myeong-Gi Bridge, Airport construction, industrial complex after the Nakdong barrage construction.

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Regional Characteristics of Bird Community in Nakdong River Basin

Cited by 12 publications

References 2 publications

Decrease in population of swans (Cygnus spp.) due to the development of areas adjacent to the wintering site

Decrease in population of swans (Cygnus spp.) due to the development of areas adjacent to the wintering site

Analyzing the Effect of River Ecosystem Fragmentation by Bridges on Changes in the Wintering Population of Whooper Swans (<italic>Cygnus cygnus</italic>): Targeting the Nakdong River, Busan

Study on the Long-term Changes in Water Quality and Benthic Ecology and Evaluation on Effect of the Barrage in Nakdong River Estuary

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Regional Characteristics of Bird Community in Nakdong River Basin

Cited by 12 publications

References 2 publications

Decrease in population of swans (Cygnus spp.) due to the development of areas adjacent to the wintering site

Decrease in population of swans (Cygnus spp.) due to the development of areas adjacent to the wintering site

Analyzing the Effect of River Ecosystem Fragmentation by Bridges on Changes in the Wintering Population of Whooper Swans (&lt;italic&gt;Cygnus cygnus&lt;/italic&gt;): Targeting the Nakdong River, Busan

Study on the Long-term Changes in Water Quality and Benthic Ecology and Evaluation on Effect of the Barrage in Nakdong River Estuary

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Analyzing the Effect of River Ecosystem Fragmentation by Bridges on Changes in the Wintering Population of Whooper Swans (<italic>Cygnus cygnus</italic>): Targeting the Nakdong River, Busan