Nesting success in Redshank<i>Tringa totanus</i>breeding on coastal meadows and the importance of habitat features used as perches by avian predators

Ottvall, Richard; Larsson, Kjell; Smith, Henrik G.

doi:10.1080/00063650509461402

Cited by 15 publications

(11 citation statements)

References 21 publications

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“…In contrast, a study by Ottvall et al [99] indicates that wader nest survival rates were not related to the distance to habitat edges or other features used by predators. Accordingly, as noted by Ottvall [91] reductions of predator habitat solely within in wet grasslands may not lead to a decrease predation on waders.…”

Section: Birds Of Preymentioning

confidence: 40%

Wet Grasslands as a Green Infrastructure for Ecological Sustainability: Wader Conservation in Southern Sweden as a Case Study

et al. 2016

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Abstract:Biosphere Reserves aim at being role models for biodiversity conservation. This study focuses on the unsuccessful conservation of waders (Charadrii) on wet grasslands in the Kristianstad Vattenrike Biosphere Reserve (KVBR) in southern Sweden. Predation on nests and young has been proposed as one reason contributing to the decline of waders. We explored this hypothesis by comparing two landscapes, one with declining (KVBR) and one with stable (Östergötland) wader populations on managed wet grasslands in southern Sweden. Specifically, we tested three predictions linked to predation on wader nests and young, namely that (1) the relative abundance of avian predators and waders; (2) the avian predator abundance; and (3) the predation rate on artificial wader nests, should all be higher in declining versus stable populations. All predictions were clearly supported. Nevertheless, predation may not be the ultimate factor causing wader population declines. We discuss the cumulative effects of landscape change linked to increased food resources for predators, reduced wet grassland patch size and quality. Holistic analyses of multiple wet grassland landscapes as social-ecological systems as case studies, including processes such as predation and other factors affecting waders, is a promising avenue towards collaborative learning for wet grasslands as a functional green infrastructure. However, if governance and management approaches can be improved is questionable without considerable investment in both ecological and social systems.

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Section: Birds Of Preymentioning

confidence: 40%

Wet Grasslands as a Green Infrastructure for Ecological Sustainability: Wader Conservation in Southern Sweden as a Case Study

et al. 2016

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“…The second, weaker relationship with nest predation rate was the distance of nests from the field boundary. The finding that nests further from the field edge suffered lower predation rates is common to previous studies of Lapwings nesting in arable habitats (Sheldon 2002;Sharpe 2006), although several studies of wader (including Lapwing) nest predation have not found a relationship with distance to habitat edge and/or linear features (Berg 1996;Seymour 1999;Ottvall et al 2005). Our finding is probably related to the preferential use of field margins by several predator species for navigation through the landscape and as foraging areas (e.g.…”

Section: Nest Density and Predation Ratesmentioning

confidence: 79%

Predation of Lapwing Vanellus vanellus nests on lowland wet grassland in England and Wales: effects of nest density, habitat and predator abundance

MacDonald

Bolton

2008

J Ornithol

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There is concern that predation of Lapwing Vanellus vanellus nests may create additional pressure on declining populations of this species in Europe. At seven sites in England and Wales, daily nest predation rates on 1,390 nests were related to variables using Generalised Linear Mixed Models. The strongest predictor was Lapwing nest density (number of nests within 100 m): predation rates declined as nest density increased. Since nocturnal species, probably mammals, have been identified as the major predators of Lapwing nests at these sites, these results suggest that Lapwings are able to deter mammalian predators or may settle to nest at high densities in areas with low predation pressure. At the site level, there was no relationship between Lapwing nesting density and fox density, and a positive relationship with Carrion Crow Corvus corone nesting density. There was a weaker effect of distance to field boundary: nests closer to boundaries were more likely to be predated. Weak interactive effects between crow density and both nest visibility and distance to vantage point were identified in models using a reduced subset of nests. These were counter-intuitive, did not persist in the larger data set, and do not have obvious explanations. If Lapwings nesting at high density are able to deter predators, there are implications for land management. Smaller areas could be managed within potential breeding habitat to encourage Lapwings to nest in dense colonies. Selection of larger fields for such management, where nests could be located far from the field boundary should improve the value of such measures.

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“…At the same site, nest failure was higher for early nests of Ruff Philomachus pugnax , Black‐tailed Godwit and Snipe, a trend also observed in Snipe in wet grassland (Green 1988) and Ringed Plovers in coastal dunes and beaches (Pienkowski 1984). Elsewhere, DPR increased with the progression of the season for Redshank and other species on coastal meadows and saltmarsh (Ottvall 2005a, Ottvall et al . 2005, Thyen & Exo 2005), but did not do so for a range of other species in various habitats (Galbraith 1988, Berg et al .…”

Section: Factors Affecting Rates Of Nest Predationmentioning

confidence: 99%

Predation on wader nests in Europe

MacDonald

Bolton

2008

Ibis

151

137

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The population declines of waders in Europe are widely considered to have resulted from habitat loss and degradation due to agricultural changes. However, recent empirical evidence suggests that levels of predation on wader nests are unsustainably high in many cases, even in some situations where breeding habitat is otherwise favourable. We review the published and 'grey' literature on nest predation on waders in Europe and quantify the relative importance of the major predators. Nest cameras offer the least biased method of identifying and quantifying nest predators. A small number of camera studies, in combination with others utilizing nest temperature loggers, indicate that nocturnal/mammalian predators make the largest contribution to wader nest predation. More than half of site-years or studies reviewed reported clutch failure rates of over 50% attributable to predation alone, a rate that is likely to be associated with declining populations, although parameters such as chick and adult survival will also affect population trends. Correlates of wader nest predation are documented, with time of season, field type and management, distance to habitat/field edge, wader nest density, and abundance of mammalian predators being most consistently identified. Future directions of research into wader productivity are discussed, and we suggest that studies quantify additional life-history parameters such as chick survival, as well as examining the predator community, wherever possible.

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Nesting success in RedshankTringa totanusbreeding on coastal meadows and the importance of habitat features used as perches by avian predators

Cited by 15 publications

References 21 publications

Wet Grasslands as a Green Infrastructure for Ecological Sustainability: Wader Conservation in Southern Sweden as a Case Study

Wet Grasslands as a Green Infrastructure for Ecological Sustainability: Wader Conservation in Southern Sweden as a Case Study

Predation of Lapwing Vanellus vanellus nests on lowland wet grassland in England and Wales: effects of nest density, habitat and predator abundance

Predation on wader nests in Europe

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