Dynamics of Habitat Use by Shorebirds in Estuarine and Agricultural Habitats in Northwestern California

Long, Linda L.; Ralph, C. John

doi:10.1676/0043-5643(2001)113[0041:dohubs]2.0.co;2

Cited by 26 publications

(17 citation statements)

References 22 publications

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“…Previous studies have shown that waterbirds, especially shorebirds, use tidal flats for roosting and foraging at low tide when the habitat is exposed, and use alternate roosting and foraging habitats at high tide (Burger and others, 1977;Warnock and Takekawa, 1995;Long and Ralph, 2001; Dias and others, 2006). Similarly, we observed high abundances of waterbirds using Pond SF2 and the islands therein at high tide when the adjacent mudflats were inundated.…”

Section: Discussionmentioning

confidence: 99%

The critical role of islands for waterbird breeding and foraging habitat in managed ponds of the South Bay Salt Pond Restoration Project, South San Francisco Bay, California

Ackerman¹,

Hartman²,

Herzog³

et al. 2014

Open-File Report

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For more information on the USGS-the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment-visit http://www.usgs.gov or call 1-888-ASK-USGS (1-888-275-8747) For an overview of USGS information products, including maps, imagery, and publications, visit http: //www.usgs.gov/pubprod To order this and other USGS information products, visit http://store.usgs.gov Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.Although this information product, for the most part, is in the public domain, it also may contain copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner.Suggested citation: Ackerman, J.T., Hartman, C.A., Herzog, M.P., Smith, L.M., Moskal, S.M., De La Cruz, S.E.W., Yee, J.L., and Takekawa, J.Y., 2014, The critical role of islands for waterbird breeding and foraging habitat in managed ponds of the South Bay Salt Pond Restoration Project, South San Francisco Bay, California: U.S. Geological Survey Open-File Report 2014-1263, 108 p., http://dx.doi.org/10.3133/ofr20141263. ISSN 2331-1258 iii Executive SummaryThe South Bay Salt Pond Restoration Project aims to restore 50-90 percent of former salt evaporation ponds into tidal marsh in South San Francisco Bay, California. However, large numbers of waterbirds use these ponds annually as nesting and foraging habitat. Islands within ponds are particularly important habitat for nesting, foraging, and roosting waterbirds. To maintain current waterbird populations, the South Bay Salt Pond Restoration Project plans to create new islands within former salt ponds in South San Francisco Bay. In a series of studies, we investigated pond and individual island attributes that are most beneficial to nesting, foraging, and roosting waterbirds. Nesting Waterbird Use of IslandsWe evaluated waterbird nesting on pond islands at multiple spatial scales. First, at the largest spatial scale, we used historical nesting data to investigate how attributes of South Bay ponds influenced waterbird nest abundance and nest success among ponds. Pond attributes examined included total pond area, the number of islands within a pond, total island area, the ratio of island area to pond area, and distance to San Francisco Bay. Second, at the intermediate spatial scale, we used historical nesting data to investigate how attributes of individual islands in ponds influenced waterbird nest abundance and nest success on islands. Island attributes examined included island area, island shape, island distance to San Francisco Bay, and island distance to nearest surrounding pond levee. Third, at the smallest spatial scale, we used highly precise Global Positioning System (GPS) technology to study the topography of nesting islands to investigate within-island attributes selected by nesting waterbirds . At this small scale, we evaluated how elevation, distance to the water's edge, slope, a...

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Section: Discussionmentioning

confidence: 99%

The critical role of islands for waterbird breeding and foraging habitat in managed ponds of the South Bay Salt Pond Restoration Project, South San Francisco Bay, California

Ackerman¹,

Hartman²,

Herzog³

et al. 2014

Open-File Report

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“…일반적으로 많은 도요⋅물 떼새류가 대륙의 해안선을 따라 이동하며, 조간대를 일차적인 중간기착지로 이용하는 것으로 알려져 있다 (Recher, 1966;Bengtson and Svensson, 1968). 그러나 이러한 조간대 서 식지는 만조로 인하여 도요⋅물떼새류들이 주기적으로 이용 이 불가능하므로 이에 상응하여 다양한 내륙습지를 취식지로 이용한다 (Long and Ralph, 2001). 그리고 악천후 기간 동 안 논을 취식지로 이용함으로써 에너지를 회복하기도 한다 (Goss-Custard, 1969;Townshend, 1981).…”

Section: 세계자연보호연맹(Iucn)에 따르면 Eaaf 조간대의 생 물다양성 감소가 급격히 나타나고 생태서비스가 소실되unclassified

Characteristics of Population Dynamics and Habitat Use of Shorebirds in Rice Fields during Spring Migration

Choi¹,

Nam²,

Yoo³

2014

Korean Journal of Environmental Agriculture

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BACKGROUND:Shorebirds use a variety of wetlands as their stopover sites to replenish energy and nutrient reserves along the migration route. It is increasingly important to understand how birds use the remaining available habitats during migration period, because shorebird stopover sites are often altered and destroyed. Rice fields serve as a major inland stopover site for migrating shorebirds. However, the information on habitat use patterns of shorebirds in rice fields is very limited in Korea. Therefore, we studied the patterns of shorebird abundance and their habitat use in rice fields during spring migration period in western-central Korea. METHODS AND RESULTS:Surveys were conducted at interval of 2-3 days during the spring migration period of 2014 at rice fields of mid-western Korea. We recorded the location of the observed birds on the rice field map according to the local habitat type. The habitat types were divided by physical structure and cultivation methods. Fifteen shorebird species and 7,852 individuals were recorded during the survey period. The number of shorebird

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“…Waterbirds have to select suitable habitats when facing constantly changing habitats during the winter (Warnock and Takekawa, 1995;Long and Ralph, 2001;Beerens et al, 2011). Resource partitioning is related to its availability in habitats (Kober and Bairlein, 2009).…”

Section: Characteristics Of Habitat Utilization Of Hooded Crane Populmentioning

confidence: 99%

“…3 Habitat utilization rates of wintering geese at three wintering stages availability would cause dynamic changes of the niche of waterbirds (Pearman et al, 2008). When the number of suitable habitats is reduced, the utilization of other habitats will inevitably increase as a compensation for habitat loss (Gerstenberg, 1979;Warnock and Takekawa, 1995;Long and Ralph, 2001). In our study, the variation in water level and seasonal changes of vegetation structure and human activities jointly affected the availability of wetland resources at Shengjin Lake.…”

Section: Characteristics Of Habitat Utilization Of Hooded Crane Populmentioning

confidence: 99%

Habitat utilization and resource partitioning of wintering Hooded Cranes and three goose species at Shengjin Lake

Zhao¹,

Zhou²,

Xu³

2013

CHINESE BIRDS

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The loss and degradation of wetlands have adversely affected waterbirds, which depend on wetland habitats. Interspecific competition has an important effect on habitat utilization of wintering waterbirds. Resource utilization, including partitioning, in degraded wetlands has become a hot issue in ecological studies of wintering waterbirds. In order to have an insight into the habitat utilization and resource partitioning between a Hooded Crane (Grus monacha) population and the guild of three goose species, i.e., Anser fabalis, A. albifrons and A. erythropus wintering in lake wetlands, we carried out a study at Shengjin Lake National Nature Reserve from November 2011 to April 2012. We surveyed the Hooded Cranes and goose guild foraging in various habitats during the wintering periods with a combined method of fixed route searching and fixed site observations. Resource partitioning was studied by means of calculating habitat utilization rates and the width and overlap of spatial niches. The results showed that the habitat utilization rate and the width of spatial niches of the Hooded Crane population and goose guild shifted with the season. The habitat utilization rates of the cranes in grasslands were high at all three wintering stages. The habitat utilization rates were 0.454, 0.435 and 0.959 respectively for the Hooded Cranes and 0.627, 0.491 and 0.616 for the goose guild. This suggests that the overlap in grasslands was higher between cranes and goose guild. Most habitats were accessible at the middle stage, so the width of the spatial niche of the cranes (1.099) and goose guild (1.133) both reached their peak at this stage. The greatest niche overlap was 0.914 for these two groups at the late stage, followed by 0.906 at the middle stage and the smallest was 0.854 at the early stage. Ecological response to the changes in habitats of wintering waterbirds was clearly shown in the dynamic variations of the niche of both the Hooded Cranes and the three goose species. Coexistence among waterbirds was achieved by regulation of niche width to reduce niche overlap and relieve interspecific resource partitioning.

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Dynamics of Habitat Use by Shorebirds in Estuarine and Agricultural Habitats in Northwestern California

Cited by 26 publications

References 22 publications

The critical role of islands for waterbird breeding and foraging habitat in managed ponds of the South Bay Salt Pond Restoration Project, South San Francisco Bay, California

The critical role of islands for waterbird breeding and foraging habitat in managed ponds of the South Bay Salt Pond Restoration Project, South San Francisco Bay, California

Characteristics of Population Dynamics and Habitat Use of Shorebirds in Rice Fields during Spring Migration

Habitat utilization and resource partitioning of wintering Hooded Cranes and three goose species at Shengjin Lake

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