Publications for Dr Ron Summers

Foraging patterns of common crossbills (Loxia curvirostra) on spruces (Picea spp.) in Scotland

Common crossbills forage on Sitka spruce and Norway spruce when the cones reach full size in late summer until the seeds have shed in the following spring. Sitka spruce start shedding seed in autumn, thereby reducing the food supply for crossbills through...

Date
01 October 2018
RSPB Authors
Dr Ron Summers
Authors
Summers. R.W.
Published in
Forestry 91 (4): 444-450
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Higher spring temperatures increase food scarcity and limit the current and future distributions of crossbills

Aim: Understanding how climate affects species distributions remains a major challenge, with the relative importance of direct physiological effects versus biotic interactions still poorly understood. We focus on three species of resource specialists (crossbill Loxia finches) to assess...

Date
02 April 2018
RSPB Authors
Dr Ron Summers
Authors
Mezquida, E.T., Svenning, J.C., Summers, R.W. & Benkman, C.W.
Published in
Diversity and Distributions 24 (4): 473-484
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Geolocator tagging reveals Pacific migration of red-necked phalarope Phalaropus lobatus breeding in Scotland

The migration route of Red-necked Phalarope populations breeding on North Atlantic islands has been subject to considerable speculation. Geolocator tags were fitted to nine Red-necked Phalaropes breeding in northern Scotland to assess ...

Date
20 August 2014
RSPB Authors
Dr Mark Bolton, Prof Jeremy Wilson, Dr Ron Summers
Authors
Smith, M., Bolton, M., Okill, D.J., Summers, R.W., Ellis, P., Liechti, F. & Wilson, J.D.
Published in
Ibis
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Associations between crossbills and North American conifers in Scotland

Understanding the habitat requirements of the Scottish crossbill Loxia scotica is fundamental to the conservation of this endemic bird which, like other crossbills, specialises in feeding on conifer...

Date
25 February 2012
RSPB Authors
Dr Ron Summers
Authors
Summers, R.W. & Broome, A.
Published in
Forest Ecology and Management
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Surveying abundance and stand type associations of Formica aquilonia and F. lugubris (Hymenoptera: Formicidae) nest mounds over an extensive area: Trialing a novel method

Red wood ants are ecologically important members of woodland communities, and some species are of conservation concern. They occur commonly only in certain habitats in Britain, but there is limited ...

Date
03 January 2012
RSPB Authors
Dr Ron Summers
Authors
Borkin, K.M., Summers, R.W. & Thomas, L.
Published in
European Journal of Entomology
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Lake characteristics and their selection by breeding Slavonian grebes Podiceps auritus in Scotland

Capsule Slavonian (Horned) Grebes Podiceps auritus bred on moderately sized lakes, preferring those with small fish, clear water, and over-hanging trees. Aim To describe breeding habitat and investigate...

Date
16 June 2011
RSPB Authors
Dr Ron Summers
Authors
Summers, R.W., Mavor, R.A., Hogg, S. & Harriman, R.
Published in
Bird Study
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Do multiple herbivores maintain chemical diversity of Scots pine monoterpenes?

A central issue in our understanding of the evolution of the diversity of plant secondary metabolites (PSMs) is whether or not compounds are functional, conferring an advantage to the plant, or nonfunctional...

Date
12 May 2011
RSPB Authors
Dr Ron Summers
Authors
Iason, G.R., O'Reilly-Wapstra, J.M., Brewer, M.J., Summers, R.W. & Moore, B.D.
Published in
Philosophical Transactions of the Royal Society B-Biological Sciences
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Burning and mowing as habitat management for capercaillie Tetrao urogallus: An experimental test

In Scots pine Pinus sylvestris forests, the important ecological effects of natural fires could be emulated using prescribed fire. Species that may benefit from fire effects include capercaillie...

Date
08 May 2011
RSPB Authors
Dr Mark Hancock, Dr Ron Summers
Authors
Hancock, M.H., Amphlett, A. Proctor, R., Dugan, D., Willi, J., Harvey, P. & Summers, R.W.
Published in
Forest Ecology and Management
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Patterns of exploitation of annually varying Pinus sylvestris cone crops by seed-eaters of differing dispersal ability

Food consumption by animals depends on functional and numerical responses, and particularly the latter for food specialists. Some birds and mammals are conifer seed specialists and are likely to exploit...

Date
05 February 2011
RSPB Authors
Dr Ron Summers
Authors
Summers, R.W.
Published in
Ecography
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Numbers and breeding success of capercaillies Tetrao urogallus and black grouse T. tetrix at Abernethy Forest, Scotland

In most years, changes in numbers are associated with variations in breeding success. Aims To describe the annual variation in numbers and breeding success of Capercaillies Tetrao urogallus and...

Date
14 December 2010
RSPB Authors
Dr Ron Summers
Authors
Summers, R.W., Dugan, D. & Proctor, R.
Published in
Bird Study
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