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Article << Previous     |     Next >>   Contents Vol 111(1)

A productivity-based explanation for woodland bird declines: poorer soils yield less food

David M. Watson A

Institute for Land, Water and Society, Charles Sturt University, PO Box 789, Albury, NSW 2640, Australia. Email: dwatson@csu.edu.au

Emu 111(1) 10-18 http://dx.doi.org/10.1071/MU09109
Submitted: 27 November 2009  Accepted: 15 April 2010   Published: 21 February 2011


 
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Abstract

The decline of woodland birds in southern Australia has motivated considerable research, identifying which species, habitats and regions are most affected, but the mechanisms driving these declines remain unclear. Applying findings from plant ecology, hydrology and soil science, I evaluate how availability of water and nutrients has been altered by agricultural development and how those changes have affected woodland food webs. Selective clearing of woodlands on fertile soils and overgrazing of remaining native vegetation have lowered productivity, whereas the storage of water has shifted from within the soil to surface reservoirs. I suggest that these changes have had a profound impact on below-ground decomposer communities, leading to fewer ground-dwelling invertebrate prey and reduced insectivore numbers. This productivity-based hypothesis is congruent with many previous findings, explaining the susceptibility of ground-foraging insectivores to changing land-use (via nutritional limitation), the sensitivity of southern woodlands (via summer drought stress), and the decreased resilience of eucalypt woodlands (via lower litter-fall and greater sensitivity to eutrophication). I detail six testable predictions extending beyond birds to microbial communities, plants, and other woodland-dependent animals. Finally, I explore the implications of this hypothesis, highlighting the value of remnant habitat on productive land to the long-term persistence of woodland bird populations.

Additional keywords:declining woodland birds, eutrophication, farmland, food limitation, habitat fragmentation, insectivore, nectarivore.


References

Antos, M. J., and Bennett, A. F. (2005). How important are different types of temperate woodlands for ground-foraging birds? Wildlife Research 32, 557–572.
CrossRef |

Antos, M. J., and Bennett, A. F. (2006). Foraging ecology of ground-feeding woodland birds in temperate woodlands of southern Australia. Emu 106, 29–40.
CrossRef |

Attiwill, P. M., and Leeper, G. W. (1987). ‘Forest Soils and Nutrient Cycling.’ (Melbourne University Press: Melbourne.)

Attiwill, P. M., Ploglase, P. J., Weston, C. J., and Adams, M. A. (1996). Nutrient cycling in forests of south-eastern Australia. In ‘Nutrition of Eucalypts’. (Eds P. M. Attiwill and M. A. Adams.) pp. 191–227. (CSIRO Publishing: Melbourne.)

BirdLife International (2008). ‘State of the World’s Birds: Indicators for Our Changing World.’ (BirdLife International: Cambridge, UK.)

Bardgett, R. D. (2005). ‘The Biology of Soil: A Community and Ecosystem Approach.’ (Oxford University Press: Oxford, UK.)

Barker, R. D., and Vestjens, W. J. M. (1990). ‘The Food of Australian Birds: Passerines.’ (CSIRO Division of Wildlife and Ecology: Lyneham, ACT.)

Bowen, M. E., McAlpine, C. A., House, A. P. N., and Smith, G. C. (2009). Agricultural landscape modification increases the abundance of an important food resource: mistletoes, birds and brigalow. Biological Conservation 142, 122–133.
CrossRef |

Clarke, P. J. (2003). Composition of grazed and cleared temperate grassy woodlands in eastern Australia: patterns in space and inferences in time. Journal of Vegetation Science 14, 5–14.
CrossRef |

Clarke, P. J., and Allaway, W. G. (1996). Litterfall in Casuarina glauca coastal wetland forests. Australian Journal of Botany 44, 373–380.
CrossRef |

Close, D. C., and Davidson, N. J. (2004). Review of rural tree decline in a changing Australian climate. Tasforests 15, 1–18.

Cole, L., and Bardgett, R. D. (2002). Soil animals, microbial activity and nutrient cycling. In ‘Encyclopedia of Soil Science’. (Ed. R. Lal.) pp. 72–75. (Marcel Dekker Inc.: New York.)

Dickman, C. R., Pressey, R. L., Lim, L., and Parnaby, H. E. (1993). Mammals of particular concern in the Western Division of New South Wales. Biological Conservation 65, 219–248.
CrossRef |

Didham, R. K. (1997). An overview of invertebrate responses to forest fragmentation. In ‘Forests and Insects’. (Eds A. D. Watt, N. E. Stork and M. D. Hunter.) pp. 303–319. (Chapman and Hall: London.)

Donald, P. F., Green, R. E., and Heath, M. F. (2001). Agricultural intensification and the collapse of Europe’s farmland bird populations. Proceedings of the Royal Society of London. Series B: Biological Sciences 268, 25–29.
CrossRef |

Duncan, D. H., Dorrough, J., White, M., and Moxham, C. (2008). Blowing in the wind? Nutrient enrichment of remnant woodlands in an agricultural landscape. Landscape Ecology 23, 107–119.
CrossRef |

Eldridge, D. J., and Greene, R. S. B. (1994). Microbiotic soil crusts: a review of their roles in soil and ecological processes in the rangelands of Australia. Australian Journal of Soil Research 32, 389–415.
CrossRef |

Facelli, J. M., and Pickett, S. T. A. (1991). Plant litter: its dynamics and effects on plant community structure. Botanical Review 53, 12–35.

Fanning, P. (1994). Long-term contemporary erosion rates in an arid rangelands environment in western New South Wales, Australia. Journal of Arid Environments 28, 173–187.
CrossRef |

Ford, H. A. (2011). The causes of decline of birds of eucalypt woodlands: advances in our knowledge over the last 10 years. Emu 111, 1–9.
CrossRef |

Ford, H. A., Barrett, G. W., Saunders, D. A., and Recher, H. F. (2001). Why have birds in the woodlands of Southern Australia declined? Biological Conservation 97, 71–88.
CrossRef |

Franklin, D. C., Menkhorst, P. W., and Robinson, J. L. (1989). Ecology of the Regent Honeyeater Xanthomyza phrygia. Emu 89, 140–154.
CrossRef |

Franklin, D. C., Woinarski, J. C. Z., and Noske, R. A. (2000). Geographical patterning of species richness among granivorous birds in Australia. Journal of Biogeography 27, 829–842.
CrossRef |

Fretz, J. S. (2002). Scales of food availability for an endangered insectivore, the Hawaii Akepa. Auk 119, 166–174.
CrossRef |

Fuller, R. J., Smith, K. W., Grice, P. V., Currie, F. A., and Quine, C. P. (2007). Habitat change and woodland birds in Britain: implications for management and future research. Ibis 149, 261–268.
CrossRef |

Gale, S. J., and Haworth, R. J. (2005). Catchment-wide soil loss from pre-agricultural times to the present: transport- and supply-limitation of erosion. Geomorphology 68, 314–333.
CrossRef |

Garnett, S. (1992). ‘Threatened and Extinct Birds of Australia.’ RAOU Report No. 82. (Royal Australasian Ornithologists Union: Melbourne.)

Goldney, D. C., and Bowie, I. J. S. (1990). Some management implications for the conservation of vegetation remnants and associated fauna in the central western regions of New South Wales. Proceedings of the Ecological Society of Australia 16, 427–440.

Grigg, A. H., and Mulligan, D. R. (1999). Litterfall from two eucalypt woodlands in central Queensland. Australian Journal of Ecology 24, 662–664.
CrossRef |

Harris, M. R., Lamb, D., and Erskine, P. D. (2003). An investigation into the possible inhibitory effects of white cypress pine (Callitris glaucophylla) litter on the germination and growth of associated ground cover species. Australian Journal of Botany 51, 93–102.
CrossRef |

Heatwole, H., and Lowman, M. (1986). ‘Dieback: Death of an Australian Landscape.’ (Reed Books: Sydney.)

Hewson, C. M., Carpenter, J. E., Broughton, R. K., Bellamy, P. E., Rothery, P., Amar, A., Hewson, C. M., and Gosler, A. G. (2007). Recent changes in British woodland bird populations derived from the Repeat Woodland Bird Survey. Ibis 149, 225–234.

Higgins, P. J., Peter, J. M., and Steele, W. K. (Eds) (2001). ‘Handbook of Australian, New Zealand and Antarctic Birds. Vol. 5: Tyrant-flycatchers to Chats.’ (Oxford University Press: Melbourne.)

Hilder, E. J., and Mottershead, B. E. (1963). The redistribution of plant nutrients through free-grazing sheep. Australian Journal of Science 26, 88–89.
| CAS |

Hobbs, R. J., and Yates, C. J. (2000). ‘Temperate Eucalypt Woodlands in Australia: Biology, Conservation, Management and Restoration.’ (Surrey Beatty and Sons: Sydney.)

Hobbs, R. J., Saunders, D. A., Lobry de Bruyn, L. A., and Main, A. R. (1993). Changes in biota. In ‘Reintegrating Fragmented Landscapes: Towards Sustainable Production and Nature Conservation’. (Eds R. J. Hobbs and D. A. Saunders.) pp. 65–106. (Springer Verlag: New York.)

House, S. M. (1997). Reproductive biology of eucalypts. In ‘Eucalypt Ecology: Individuals to Ecosystems’. (Eds J. Williams and J. Woinarski.) pp. 30–55. (Cambridge University Press: Cambridge, UK.)

Huston, M. A. (1979). A general hypothesis of species diversity. American Naturalist 113, 81–101.
CrossRef |

Huston, M. A. (1994). ‘Biological Diversity: The Coexistence of Species on Changing Landscapes.’ (Cambridge University Press: Cambridge.)

Hutto, R. L. (1990). Measuring the availability of food resources. In ‘Avian Foraging: Theory, Methodology, and Applications’. (Eds M. L. Morrison, C. J. Ralph, J. Verad and J. R. Jehl Jr.) pp. 20–28. (Allen Press: Lawrence, KS.)

James, C. D., Landsberg, J., and Morton, S. R. (1999). Provision of watering points in the Australian arid zone: a review of effects on biota. Journal of Arid Environments 41, 87–121.
CrossRef |

Keith, H. (1997). Nutrient cycling in eucalypt ecosystems In ‘Eucalypt Ecology: Individuals to Ecosystems’. (Eds J. Williams and J. Woinarski.) pp. 197–226. (Cambridge University Press: Cambridge UK.)

King, K. L., and Hutchinson, K. J. (1983). The effects of sheep grazing on invertebrate numbers and biomass in unfertilized natural pastures of the New England Tablelands (NSW). Australian Journal of Ecology 8, 245–255.
CrossRef |

Lacey, C. J. (1973). Silvicultural characteristics of white cypress pine. Research Note 26, Forestry Commission of New South Wales, Sydney.

Landsberg, J., and Crowley, G. (2004). Monitoring rangeland biodiversity: plants as indicators. Austral Ecology 29, 59–77.
CrossRef |

Lea, A. M., and Gray, J. T. (1935). The food of Australian birds. Emu 35, 63–98.
CrossRef |

Leach, G. J., and Recher, H. F. (1993). Use of roadside remnants of softwood scrub vegetation by birds in south-eastern Queensland. Wildlife Research 20, 233–250.
CrossRef |

Ludwig, J., Tongway, D., Freudenberger, D., Noble, J., and Hodginkson, K. (Eds) (1997). ‘Landscape Ecology, Function and Management: Principles from Australia’s Rangelands.’ (CSIRO Publishing: Melbourne.)

Mack, R. N. (1989). Temperate grasslands vulnerable to plant invasions: characteristics and consequences. In ‘Biological Invasions: A Global Perspective’. (Eds J. A. Drake, H. A. Mooney, F. DiCastri, R. H. Groves, F. J. Kruger, M. Rejmanek and M. Williamson.) pp. 155–179. (Wiley: Chichester, UK.)

Mac Nally, R., Bennett, A. F., Thomson, J. R., Radford, J. Q., Unmack, G., Horrocks, G., and Vesk, P. A. (2009). Collapse of an avifauna: climate change appears to exacerbate habitat loss and degradation. Diversity & Distributions 15, 720–730.
CrossRef |

Maron, M., Lill, A., Watson, D. M., and Mac Nally, R. (2005). Temporal variation in bird assemblages: how representative is a one-year snapshot? Austral Ecology 30, 383–394.
CrossRef |

March, W. A., and Watson, D. M. (2007). Parasites boost productivity: effects of mistletoe on litter dynamics in a temperate Australian forest. Oecologia 154, 339–347.
CrossRef | PubMed |

McIntyre, S., and Lavorel, S. (1994). How environmental and disturbance factors influence species composition in temperate Australian grasslands. Journal of Vegetation Science 5, 373–384.
CrossRef |

McIntyre, S., McIvor, J. G., and Heard, K. M. (2002). ‘Managing and Conserving Grassy Woodlands.’ (CSIRO Publishing: Melbourne.)

McIvor, J. G. (2002). Soils. In ‘Managing and Conserving Grassy Woodlands’. (Eds S. McIntyre, J. G. McIvor and K. M. Heard.) pp. 41–60. (CSIRO Publishing: Melbourne.)

Major, R. E., Christie, F. J., and Gowing, G. (2001). Influence of remnant and landscape attributes on Australian woodland bird communities. Biological Conservation 102, 47–66.
CrossRef |

Montague-Drake, R. M., Lindenmayer, D. B., and Cunningham, R. B. (2009). Factors affecting site occupancy by woodland bird species of conservation concern. Biological Conservation 142, 2896–2903.
CrossRef |

Murcia, C. (1995). Edge effects in fragmented forests: implications for conservation. Trends in Ecology & Evolution 10, 58–62.
CrossRef | CAS |

Murphy, M. T. (2003). Avian population trends within the evolving agricultural landscape of eastern and central United States. Auk 120, 20–34.
CrossRef |

Nicolson, S. W. (1995). Direct demonstration of nectar reabsorption in the flowers of Grevillea robusta (Proteaceae). Functional Ecology 9, 584–588.
CrossRef |

Noack, A. (1996). The effects of habitat degradation on the invertebrates of shrubland communities, with special reference to the food resources of the White-browed Babbler Pomatostomus superciliosus. B.Sc.(Hons) Thesis. School of Environmental Biology, Curtin University of Technology, Perth.

Noble, J. C., M?ller, W. J., Detling, J. K., and Pfitzner, H. (2007). Landscape ecology of the burrowing bettong: warren distribution and patch dynamics in semiarid eastern Australia. Austral Ecology 32, 326–337.
CrossRef |

O’Connell, A. M. (1986). Effect of legume understorey on decomposition and nutrient content of eucalypt forest litter. Plant and Soil 92, 235–248.
CrossRef | CAS |

Oliver, D. L., and Parker, D. G. (2006). Woodland birds of the NSW Central Murray Catchment: measuring outcomes of the Greening Australia fencing and tree planting program. Consultancy report for Birds Australia. New South Wales Department of Environment and Conservation, Queanbeyan.

Prober, S. M., and Thiele, K. R. (1995). Conservation of grassy white box woodlands: relative contributions of size and disturbance to floristic composition and diversity of remnants. Australian Journal of Botany 43, 349–366.
CrossRef |

Prober, S. M., Lunt, I. D., and Thiele, K. R. (2002). Determining reference conditions for management and restoration of temperate grassy woodlands: relationships among trees, topsoils and understorey flora in little-grazed remnants. Australian Journal of Botany 50, 687–697.
CrossRef |

Recher, H. F. (1999). The state of Australia’s avifauna: a personal opinion and predictions for the new millennium. Australian Zoologist 31, 11–27.

Recher, H. F., and Lim, L. (1990). A review of the current ideas of the extinction, conservation and management of Australia’s terrestrial vertebrate fauna. Proceedings of the Ecological Society of Australia 16, 287–301.

Recher, H. F., Majer, J. D., and Ganesh, S. (1996). Eucalypts, arthropods and birds: on the relation between foliar nutrients and species richness. Forest Ecology and Management 85, 177–195.
CrossRef |

Reid, J. R. W. (1999). Threatened and declining birds in the New South Wales sheep-wheat belt: 1. Diagnosis, characteristics and management. Consultancy report to NSW National Parks and Wildlife Service. CSIRO Wildlife and Ecology, Canberra.

Robinson, D. (1991). Threatened birds in Victoria: their distributions, ecology and future. Victorian Naturalist 108, 67–77.

Robinson, D., and Traill, B. J. (1996). Conserving woodland birds in the wheat and sheep belts of southern Australia. Royal Australian Ornithologists’ Union Conservation Statement No. 10, Melbourne.

Robinson, S. K. (1998). Another threat posed by forest fragmentation: reduced food supply. Auk 115, 1–3.

Robinson, S. K., and Wilcove, D. S. (1994). Forest fragmentation in the temperate zone and its effects on migratory songbirds. Bird Conservation International 4, 233–249.
CrossRef |

Runte, A. (1979). ‘National Parks: The American Experience.’ (University of Nebraska Press: Lincoln, NE.)

Taylor, J. A., Hedges, D. A., and Whalley, R. D. B. (1984). The occurrence, distribution and characteristics of sheep camps on the Northern Tablelands of New South Wales. Australian Rangeland Journal 6, 10–16.
CrossRef | CAS |

Taylor, S. G. (2008). Leaf litter invertebrate assemblages in box-ironbark forest: composition, size and seasonal variation in biomass. Victorian Naturalist 125, 19–27.

Tongway, D. J., Sparrow, A. D., and Friedel, M. H. (2003). Degradation and recovery processes in arid grazing lands of central Australia. Part 1: Soil and land resources. Journal of Arid Environments 55, 301–326.
CrossRef |

Traill, B. J., Collins, E., Peake, P., and Jessup, S. (1996). Current and past status of the birds of Chiltern – a box-ironbark forest in north-eastern Victoria. Australian Bird Watcher 16, 309–326.

Usher, M. B., Field, J. P., and Bedford, S. E. (1993). Biogeography and diversity of ground-dwelling arthropods in farm woodlands. Biodiversity Letters 1, 54–62.
CrossRef |

Watson, D. M. (2001). Mistletoe – a keystone resource in forests and woodlands worldwide. Annual Review of Ecology and Systematics 32, 219–249.
CrossRef |

Watson, D. M. (2002). Effects of mistletoe on diversity: a case-study from southern New South Wales. Emu 102, 275–281.
CrossRef |

Watson, D. M. (2009). Parasitic plants as facilitators: more Dryad than Dracula? Journal of Ecology 97, 1151–1159.
CrossRef |

Watson, D. M., Mac Nally, R. C., and Bennett, A. F. (2000). The avifauna of remnant Buloke (Allocasuarina luehmanni) woodlands in western Victoria. Pacific Conservation Biology 6, 46–60.

Wilson, J. (2002). Flowering ecology of a box-ironbark eucalyptus community. Ph.D. Thesis, School of Ecology and Environment, Deakin University, Melbourne.

Wilson, K. L., and Johnson, L. A. S. (1989). Casuarinaceae. In ‘Flora of Australia. Vol. 3: Hamamelidales to Casuarinales’. (Ed. A. S. George.) pp. 100–182. (Australian Government Publishing Service: Canberra.)

Woinarski, J. C. Z., McCosker, J. C., Gordon, G., Lawrie, B., James, C., Augusteyn, J., Slater, L., and Danvers, T. (2006). Monitoring change in the vertebrate fauna of central Queensland, Australia, over a period of broadscale vegetation clearance, 1973–2002. Wildlife Research 33, 263–274.
CrossRef |

Yates, C. J., and Hobbs, R. J. (1997). Temperate eucalypt woodlands: a review of their status, processes threatening their persistence and techniques for restoration. Australian Journal of Botany 45, 949–973.
CrossRef |

Zanette, L., Doyle, P., and Trémont, S. M. (2000). Food shortage in small fragments: evidence from an area sensitive passerine. Ecology 81, 1654–1666.
CrossRef |


   
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