Abstract
Seasonal changes in the distribution and feeding behaviour of dark-bellied brent geese Branta b. bernicla (L.) and the biomass of their food plants were studied in three successive winters on the Norfolk coast. The data was used, in conjunction with published information, to show how depletion, productivity and mortality of food plants drive the pattern of habitat switching in this species. It is then possible to explain the habitat shifts observed over the last 35 years and predict future changes. On arrival, geese fed first on algal beds and then on salt marsh, grass and arable fields before returning to feed entirely on the salt marsh in spring. The biomass of green algae, and subsequently the salt marsh vegetation, declined during the autumn and this could be attributed to depletion through goose grazing and natural mortality. As depletion occurred the geese fed more intensively, for a greater percentage of time and with an increasing pace rate, the net result, however, was a declining intake rate (as measured by defaecation rate). The algal biomass at which the geese switched from the algal beds to salt marsh was consistent between years, with heavy storm-induced loss of algae in one year resulting in an earlier switch. That the timing of habitat switches may be explained by depletion of food plants was further supported by historical data: the number of brent geese wintering at the site has increased dramatically over the last 30–35 years and the time of switching from algal beds to salt marsh and from salt marsh to salt marsh and fields has become progressively earlier, as expected from the increased depletion. The expected further increase in brent goose numbers will increase the rate of depletion of intertidal vegetation so that the switches between habitats will be more rapid and the geese will move inland earlier and remain inland longer. The expected increase in the brent goose population will thus result in a disproportionate increase in the levels of conflict between brent geese and agriculture.
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References
Bedard KM, Gauthier G (1986) Assessment of faecal output in geese. J Appl Ecol 23: 77–90
Bernstein C, Kacelnik A, Krebs JR (1988) Individual decisions and the distribution of predators in a patchy environment. J Anim Ecol 57: 1007–1026
Bernstein C, Kacelnik A, Krebs JR (1991) Individual decisions and the distribution of predators in a patchy environment. II. The influence of travel costs and the structure of the environment. J Anim Ecol 60: 205–225
Bovd R, Richerson PJ (1985) Culture and the evolutionary process. University of Chicago Press, Chicago
Charman K (1979) Feeding ecology and energetics of the dark-bellied brent goose (Branta bernicla bernicla) in Essex and Kent. In: Jefferies RL, Davy AJ (eds) Ecological processes in coastal environments. Blackwell, Oxford, pp 451–465
Clausen P (1994) Waterfowl as primary consumers in shallow water fiord arcas. PhD thesis, National Environmental Research Institute, University of Aarhus
Comins HN, Hassell MP (1979) The dynamics of optimally foraging predators and parasitoids. J Anim Ecol 48: 335–351
Cooch EG, Jefferies RL, Rockwell RF, Cooke F (1993) Environmental change and the cost of philopatry: an example in the lesser snow goose. Oecologia 93: 128–138
Crawley MJ (1988) Herbivory and plant population dynamics. In: Davy AJ, Hutchings MJ, Watkinson AR (eds) Plant population biology. Blackwell, Oxford, pp 367–392
Cyr H, Pace ML (1993) Magnitude and patterns of herbivory in aquatic and terrestrial ecosystems Nature 361: 148–150
Drent RH, Prins HHT (1987) The herbivore as a prisoner of its food supply. In: Andel J van, Bakker JP, Snaydon RW (eds) Distubance in grasslands. Junk, Dordrecht, pp 131–147
Drent R, Ebbinge B, Weijand B (1979) Balancing the energy budgets of arctic-breeding geese throughout the annual cycle: a progress report. Verh Ornithod Ges Bayern 23: 239–264
Jefferies RL (1988) Pattern and process in Arctic coastal vegetation in response to foraging by lesser snow geese. In: Werger MJA, Aart PJM van der, During HJ, Verhoeven JTA (eds) Plant from and vegetation structure. SPB Academic, The Hague, pp 281–300
Marriott RW, Forbes DK (1970) The digestion of lucerne chaff by cape barren geese, Cereopsis novaehollandiae Lantham. Aust J Zool 18: 257–263
McNaughton SJ, Ruess RW, Seagle SW (1988) Large mammals and process dynamics in African ecosystems. BioScience 38: 794–800
McNaughton SJ, Oesterheld M, Frank DA, Williams KJ (1989) Ecosystem-level patterns of primary productivity and herbivory in terrestrial habitats. Nature 341: 142–144
Milchunas DG, Lauenroth WK (1993) Quantitative effects of grazing on vegetation and soils over a global range of environments. Ecol Monogr 63: 327–366
Owen M (1971) The selection of feeding site by white-fronted geese in winter. J Appl Ecol 8: 905–917
Owen M (1975) An assessment of faecal analysis technique in waterfowl feeding studies. J Wildl Manage 39: 136–167
Prop J (1991) Food exploitation patterns by brent geese Branta bernicla during spring staging. Ardea 79: 331–342
Prins HHT, Ydenberg RC (1985) Vegetation growth and seasonal habitat shift of the barnacle goose (Branta leucopsis). Oecologia 66: 122–125
Prins HHT, Ydenberg RC, Dijk J van (1984) A lunar rhythm in the nocturnal foraging activities of wintering barnacle geese. Wildfowl 35: 93–96
Ranwell DS, Downing BM (1959) Brent goose (Branta bernicla L.) winter feeding pattern and Zostera resources at Scolt Head Island Norfolk. Anim Behav 7: 42–56
Royama T (1971) Evolutionary significance of predator's response to local differences in prey density: a theoretical study. In: Boer PJ den, Gradwell GR (eds) Dynamics of populations. Centre for Agricultural Publishing and Documentation. Wageningen, pp 344–357
Rowcliffe JM (1994) The population ecology of brent geese and their food plants. PhD thesis, University of East Anglia
St. Joseph AKM (1979) The development of inland feeding by Branta bernicla bernicla in southeastern England. In: Smart M (ed) Proceedings of the first technical meeting on Western Palearctic migratory bird management. IWRB, Gloucester, pp 132–145
Summers RW (1990) The exploitation of beds of green algae by brent geese. Esturine Coastal Shelf Sci 31: 107–112
Summers RW, Atkins C (1991) Selection by brent geese Branta bernicla for different leaf lengths of Aster tripolium on saltmarsh. Wildfowl 42: 33–36
Summers RW, Critchley CNR (1990) Use of grassland and field selection by brent geese Branta b. bernicla. J Appl Ecol 27: 834–846
Summers RW, Underhill LG (1991) The growth of the population of dark-bellied brent geese Branta b. bernicla between 1955 and 1988. J Appl Ecol 28: 574–585
Summers RW, Stansfield J, Perry S, Bishop J (1993) Utilisation, diet and diet selection by brent geese Branta bernicla bernicla on salt-marshes in Norfolk. J Zool Lond 231: 249–274
Sutherland WJ (in press) From individual behaviour to population ecology. Oxford University Press, Oxford
Sutherland WJ, Anderson CW (1993) Predicting the distribution of individuals and the consequences of habitat loss: the role of prey depletion. J Theor Biol 160: 223–230
Sutherland WJ, Goss-Custard J (1991) Predicting the consequence of habitat loss on shorebirds populations. In: Acta Congr Int Ornithol 20: 2199–2207
Ydenberg RC, Prins HHT (1981) spring grazing and the manipulation of food quality by barnacle geese. J Appl Ecol 18: 443–453
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Vickery, J.A., Sutherland, W.J., Watkinson, A.R. et al. Habitat switching by dark-bellied brent geese Branta b. bernicla (L.) in relation to food depletion. Oecologia 103, 499–508 (1995). https://doi.org/10.1007/BF00328689
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DOI: https://doi.org/10.1007/BF00328689