Drivers of songbird productivity at a restored gravel pit: Influence of seasonal flooding and rainfall patterns and implications for habitat management

Harrison, N. M.; Whitehouse, M. J.

doi:10.1016/j.agee.2012.09.004

Cited by 8 publications

(3 citation statements)

References 31 publications

(25 reference statements)

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“…), European Pied Flycatcher Ficedula hypoleuca (Both et al . ), Eurasian Reed Warbler Acrocephalus scirpaceus (Harrison & Whitehouse ) and Garden Warbler Sylvia borin (Widmer ). In contrast, only one study showed the dominance of wintering conditions on local population dynamics, in Northern Wheatear Oenanthe oenanthe (Arlt et al .…”

Section: The Serial Residency Hypothesismentioning

confidence: 99%

Migratory connectivity of Palaearctic–African migratory birds and their responses to environmental change: the serial residency hypothesis

Cresswell

2014

Ibis

155

217

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In most long-distance migratory birds, juveniles migrate without their parents and so are likely to lack detailed knowledge of where to go. This suggests the potential for stochasticity to affect their choice of wintering area at a large scale (> 1000 km). Adults, in contrast, may re-use non-breeding sites that promote their survival, so removing uncertainty from their subsequent migrations. I review the evidence for large-scale stochastic juvenile site selection followed by adult site fidelity, and then develop a 'serial-residency' hypothesis based on these two traits as a framework to explain both the migratory connectivity and the population dynamics of migrant birds and how these are affected by environmental change. Juvenile stochasticity is apparent in the age-dependent effects of weather or experimental displacement on the outcome of migration and in the very wide variation in the destinations of individuals originating from the same area. Adults have been shown to be very faithful to their wintering grounds and even to staging sites. The serial residency hypothesis predicts that migrants that show these two traits will rely on an individually unique but fixed series of temporally and spatially linked sites to complete their annual cycle. As a consequence, migratory connectivity will be apparent at a very small scale for individuals, but only at a large scale for a population, and juveniles are predicted to occur more often at less suitable sites than adults, so that survival will be lower for juveniles. Migratory connectivity will arise only through spatial and temporal autocorrelation with local environmental constraints, particularly on passage, and the distribution and age structure of the population may reflect past environmental constraints. At least some juveniles will discover suitable habitat that they may re-use as adults, thus promoting overall population-level resilience to environmental change, and suggesting value in site-based conservation. However, because migratory connectivity only acts on a large scale, any population of migrants will contain individuals that encounter a change in suitability somewhere in their non-breeding range, so affecting average survival. Differences in population trends will therefore reflect variation in local breeding output added to average survival from wintering and staging areas. The latter is likely to be declining given increasing levels of environmental degradation throughout Africa. Largescale migratory connectivity also has implications for the evolutionary ecology of migrants, generally because this is likely to lead to selection for generalist traits.

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Section: The Serial Residency Hypothesismentioning

confidence: 99%

Migratory connectivity of Palaearctic–African migratory birds and their responses to environmental change: the serial residency hypothesis

Cresswell

2014

Ibis

155

217

View full text Add to dashboard Cite

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“…Likewise, the conversion of wetlands into agricultural areas and human settlements poses a significant threat to waterbirds. Other than direct habitat loss, such change in the wetland landscape also affects hydrological systems (Harrison & Whitehouse, 2012), and consequently, habitat use by the waterbirds (Cintra, 2015; Tavares et al., 2015). Therefore, understanding how different environmental variables affect waterbirds is important for the effective conservation of waterbirds and the management of their habitats.…”

Section: Introductionmentioning

confidence: 99%

Changing Landscapes and Declining Populations of Resident Waterbirds: A 12-Year Study in Bung Boraphet Wetland, Thailand

Haq

Eiamampai²,

Ngoprasert

et al. 2018

Tropical Conservation Science

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Changes in wetland environments can alter the dynamics of waterbird populations. We investigated the effects of hydrological and landscape variables on the abundance of resident waterbirds (ducks, fish-eaters, large waders, small waders, and vegetation gleaners) from 2003 to 2014 in Bung Boraphet, Thailand's largest freshwater wetland. Generalized linear mixed models were used to determine the effects of environmental variables on waterbird numbers, and generalized additive mixed models were used to identify the threshold for each effect. The results revealed that the population of all waterbirds declined by 27% from 2003 to 2014 with highest decline of 56% in ducks. Increasing water depth was negatively correlated with the abundance of small waders and vegetation gleaners. Higher concentrations of dissolved oxygen in the water increased the abundance of fish-eaters, while marshy areas were positively associated with the abundance of ducks, large waders, and vegetation gleaners. The abundance of fish-eaters, large waders, and small waders were negatively associated with the spatial area of waterbodies. Expanding human settlements decreased the abundance of vegetation gleaners, while vegetation infested by Mimosa pigra decreased the abundance of large waders. The study concludes that the maintenance of an optimal water depth and quality, preservation of critical marsh habitats, eradication of invasive species, and restrictions on new human settlements adjacent to wetlands are all necessary to conserve resident waterbird populations. Validating these findings in additional research sites is recommended before applying it to a broader landscape level.

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“…However, variations of rainfall and temperature that influence vegetation are among the many factors affecting wildlife habitats [4,5]. Yet, other site factors, including soil features, slope, and altitude, are of significant importance in determining vegetation attributes [6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Assembly of Optimum Habitats for Asian Houbara Bustard (Chlamydotis macqueenii) in the Arabian Peninsula: The Vegetation Aspects

Asadalla

Abido

Abahussain

et al. 2015

International Journal of Biodiversity

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This research was conducted in four sites at Mahazat as-Sayd reserve in Saudi Arabia to determine the optimum habitats' constituents for Asian houbara bustard Chlamydotis macqueenii via assessing abiotic and biotic factors with special reference to vegetation aspects. Vegetative parameters were quantified using combinations of distance and line intercept methods. Acquired data were analyzed using cluster analysis and analysis of variance tests. Results indicated that three of the four plant communities of the study sites were dominated by Acacia tortilis with underground cover composed of lesser species. On the other hand, White Jabal was dominated by scrubs composed mainly of Fagonia indica with sparse Acacia trees. Rumrumiyya site recorded the highest species abundance and vegetative coverage (133%) among the sites. It is concluded that Black Jabal and White Jabal sites are used as nesting and foraging habitats for houbaras, whereas Jabal Khurse is specifically a males' display site. Nevertheless, Rumrumiyya site was used for foraging and shelter. The study confirmed that density and vegetation cover are of prime importance for houbara site selection. However, other factors affecting feeding and behavior of the species must be considered in further studies.

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Drivers of songbird productivity at a restored gravel pit: Influence of seasonal flooding and rainfall patterns and implications for habitat management

Cited by 8 publications

References 31 publications

Migratory connectivity of Palaearctic–African migratory birds and their responses to environmental change: the serial residency hypothesis

Migratory connectivity of Palaearctic–African migratory birds and their responses to environmental change: the serial residency hypothesis

Changing Landscapes and Declining Populations of Resident Waterbirds: A 12-Year Study in Bung Boraphet Wetland, Thailand

Assembly of Optimum Habitats for Asian Houbara Bustard (Chlamydotis macqueenii) in the Arabian Peninsula: The Vegetation Aspects

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