The Forgotten 60%: bird ecology and management in New Zealand's agricultural landscape.

Production lands make up 58% of Aotearoa New Zealand’s landcover and contribute greatly not only to the national economy but also to patterns and trends in native and introduced avian biodiversity. However, unlike in native forest and other indigenous habitats, birds in agro-ecosystems have received little attention to date. We argue that this is due to (1) a research focus on understanding the causes of the dramatic decline of New Zealand’s critically endangered, endemic species, (2) an adherence to a ‘preservation for intrinsic value’ over a ‘conservation through sustainable use’ paradigm for environmental management, and (3) a historical view of production landscapes as being devoid of endemic and native species and thus of no conservation value. In countering these attitudes, we suggest that the agricultural matrix may contain more native species than many people believe, and that many introduced bird species are key contributors to the social and environmental performance and resilience of these systems. We draw attention to the context, composition, ecology, and status of native and introduced birds in production landscapes in New Zealand, particularly in the face of ongoing agricultural intensification. We first identify the potential roles of local habitat, landscape composition, and introduced predators in shaping farmland bird communities. We then highlight the potential threats and opportunities for birds posed by ongoing intensification, particularly the influences of habitat modification and simplification, increased ecological subsidies through farm inputs, increased stocking rates and yields, and altered predator–prey interactions. We suggest the landscape is the appropriate spatial scale for research and management, and call for an integrated approach to the investigation of farmland birds that combines ecology, sociology, and agro-ecosystems management, and includes farmers, researchers, regulators, and the wider New Zealand public. ___________________________________________________________________________________________________________________________________

[1]  J. Innes,et al.  The relative importance of Australian magpies (Gymnorhina tibicen) as nest predators of rural birds in New Zealand , 2006 .

[2]  Food of the rook (Corvus frugilegus L.) in Hawke's Bay, New Zealand , 1979 .

[3]  H. Møller,et al.  Interspecific interaction and habitat use by Australian magpies (Gymnorhina tibicen) on sheep and beef farms, South Island, New Zealand , 2005 .

[4]  R. Holdaway,et al.  The Lost World of the Moa: Prehistoric Life of New Zealand , 2002 .

[5]  J. Innes,et al.  Successful recovery of North Island kokako Callaeas cinerea wilsoni populations, by adaptive management , 1999 .

[6]  N. Langham,et al.  The effect of poisoning on the movement of rooks Corvus frugilegus L. in southern hawke's Bay, New Zealand , 1991 .

[7]  L. F. Molloy.  Outdoor recreation. In: Land alone endures. Land use and the role of research. , 1980 .

[8]  A. Sparrow,et al.  Effects of Pollinator Loss on Endemic New Zealand Mistletoes (Loranthaceae) , 1999 .

[9]  P. Dilks.  Diet of feral pigeons (Columba livia) in Hawke's Bay, New Zealand , 1975 .

[10]  Craig J. Miller,et al.  Some issues and options for the conservation of native biodiversity in rural New Zealand , 2000 .

[11]  E. Cameron,et al.  Human influence on the terrestrial biota and biotic communities of New Zealand. , 1993, Trends in ecology & evolution.

[12]  John R. Fairweather,et al.  Understanding approaches to sheep / beef production in New Zealand: report on first qualitative interviews of ARGOS sheep / beef participants , 2006 .

[13]  Do territorial and non‐breeding Australian Magpies Gymnorhina tibicen influence the local movements of rural birds in New Zealand? , 2006 .

[14]  A. Moeed.  Foods of the silvereye (Zosterops lateralis; Aves) near Nelson, New Zealand , 1979 .

[15]  C. Bell.  Inventing New Zealand: Everyday myths of Pakeha identity , 1996 .

[16]  H. Møller,et al.  Bird community composition and relative abundance in production and natural habitats of New Zealand , 2005 .

[17]  George Catlin.  Letters and Notes on the Manners, Customs and Conditions of North American Indians , 1973 .

[18]  D. Noble,et al.  The state of play of farmland birds: population trends and conservation status of lowland farmland birds in the United Kingdom , 2004 .

[19]  Rowan Taylor,et al.  The state of New Zealand's environment, 1997 , 1997 .

[20]  T. Higham,et al.  Using rat-gnawed seeds to independently date the arrival of Pacific rats and humans in New Zealand , 2004 .

[21]  H. Robertson,et al.  The Field Guide to the Birds of New Zealand , 1996 .

[22]  J. Coleman.  The use of artificial nest sites erected for starlings in Canterbury, New Zealand , 1974 .

[23]  R. Hitchmough,et al.  Mega-island or micro-continent? New Zealand and its fauna. , 1993, Trends in ecology & evolution.

[24]  P. Williams,et al.  The role of blackbirds (Turdus merula) in weed invasion in New Zealand , 2006 .

[25]  R. Didham,et al.  Remotely sensed landscape heterogeneity as a rapid tool for assessing local biodiversity value in a highly modified New Zealand landscape , 2005, Biodiversity & Conservation.

[26]  K. Evans,et al.  Investigating geographic variation in clutch size using a natural experiment , 2005 .

[27]  R. Bunce,et al.  Changes in the abundance of farmland birds in relation to the timing of agricultural intensification in England and Wales , 2000 .

[28]  J. D. Coleman.  THE FOODS AND FEEDING OF STARLINGS IN CANTERBURY , 2004 .

[29]  Rupert S. Tipples,et al.  New Zealand , 1927 .

[30]  S. Hubbard,et al.  Importance of niche quality for Yellowhammer Emberiza citrinella nestling survival, development and body condition in its native and exotic ranges: the role of diet , 2005 .

[31]  P. Sagar,et al.  Survival of breeding Finsch's oystercatchers (Haematopus finsch~) on farmland in Canterbury, New Zealand , 2002 .

[32]  R. Silcock.  Atlas Of Bird Distribution In New Zealand 1999–2004 , 2008 .

[33]  R. L. Knight,et al.  Private Lands: The Neglected Geography , 1999 .

[34]  Predation by Australian magpies (Gymnorhina tibicen) on pasture invertebrates: Are non-territorial birds less successful? , 1989 .

[35]  A. Meister,et al.  AN ECONOMIC ANALYSIS OF BIRD DAMAGE IN VINEYARDS OF THE MARLBOROUGH REGION , 1999 .

[36]  A. Cooke,et al.  The Indirect Effects of Pesticides on Birds , 1997 .

[37]  C. Meurk,et al.  A landscape ecological framework for indigenous regeneration in rural New Zealand-Aotearoa☆ , 2000 .

[38]  M. T. Murphy.  AVIAN POPULATION TRENDS WITHIN THE EVOLVING AGRICULTURAL LANDSCAPE OF EASTERN AND CENTRAL UNITED STATES , 2003 .

[39]  John R. Fairweather,et al.  Understanding approaches to kiwifruit production in New Zealand: report on first qualitative interviews of ARGOS kiwifruit participants , 2005 .

[40]  J. Craig.  Breeding success of a communal gallinule , 1980, Behavioral Ecology and Sociobiology.

[41]  R. Green,et al.  Agricultural intensification and the collapse of Europe's farmland bird populations , 2001, Proceedings of the Royal Society of London. Series B: Biological Sciences.

[42]  R. Cooper,et al.  The New Zealand biota: Historical background and new research. , 1993, Trends in ecology & evolution.

[43]  Moira A. Pryde,et al.  Control of introduced mammalian predators improves kaka Nestor meridionalis breeding success: reversing the decline of a threatened New Zealand parrot , 2003 .

[44]  J. Craig.  Habitat variation in the social organization of a communal gallinule, the pukeko, Porphyrio porphyrio melanotus , 1979, Behavioral Ecology and Sociobiology.

[45]  I. Jamieson,et al.  Increased predation on pukeko eggs after the application of rabbit control measures , 2001 .

[46]  Feeding ecology of rooks (Corvus frugilegus) on the Heretaunga Plains, Hawke's Bay, New Zealand , 1980 .

[47]  S. Newson,et al.  Enhanced niche opportunities: can they explain the success of New Zealand's introduced bird species? , 2009 .

[48]  A. Mccann,et al.  ROLE OF PREDATION IN THE DECLINE OF KIWI, APTERYX SPP., IN NEW ZEALAND , 1996 .

[49]  S. Hubbard,et al.  Can increased niche opportunities and release from enemies explain the success of introduced Yellowhammer populations in New Zealand , 2005 .

[50]  J. Reid,et al.  ENVIRONMENTAL MONITORING AND RESEARCH FOR IMPROVED RESILIENCE ON ARGOS FARMS , 2005 .

[51]  POPULATION DYNAMICS AND AGE STRUCTURE OF STARLINGS ( STURNUS VULGARIS ) IN NEW ZEALAND , 2005 .

[52]  R. Fordham.  Seasonal dispersion and activity of the pukeko Porphyrio p. melanotus (Rallidae) in swamp and pasture , 1983 .

[53]  K. Prime,et al.  Responses of kukupa (Hemiphaga novaeseelandiae) and other birds to mammal pest control at Motatau, Northland , 2004 .

[54]  H. James.  The Lost World of the Moa: Prehistoric Life of New Zealand , 2003 .

[55]  C. F. Thompson,et al.  Body mass, composition, and survival of nestling and fledgling starlings (Sturnus vulgaris) at Belmont, New Zealand , 1991 .

[56]  Chris Rosin,et al.  Intensification of New Zealand agriculture: Implications for biodiversity , 2008 .

[57]  Catriona J. MacLeod,et al.  Intensification and diversification of New Zealand agriculture since 1960: An evaluation of current indicators of land use change , 2006 .

[58]  D. Funk.  Our Islands, Our Selves: a History of Conservation in New Zealand , 2008 .

[59]  J. D. Coleman,et al.  Farmer perceptions of bird damage and control in arable crops. , 2001 .

[60]  John R. Krebs,et al.  The second Silent Spring? , 1999, Nature.

[61]  R. Langer.  Pastures : their ecology and management , 1990 .

[62]  D. G. Dawson,et al.  A questionnaire survey of bird damage to fruit , 1970 .

[63]  Breeding of South Island pied oystercatchers (Haematopus ostralegus finschi) on farm land in mid-Canterbury, New Zealand , 2000 .

[64]  D. Norton.  Is the amount and focus of ecological research in New Zealand sufficient to sustain indigenous biodiversity on private land , 2001 .

[65]  C. Bergquist.  Movements of groups of tui (Prosthemadera novaeseelandiae) in winter and settlement of juvenile tui in summer , 1985 .

[66]  T. Purchas.  Breeding biology of rooks (Corvus frugilegus L.) in Hawke's Bay, New Zealand , 1979 .

[67]  P. Wilson.  EFFECTS ON BIRDS OF SPRAYING DDT AND DDD IN ORCHARDS , 2005 .

[68]  C. Bergquist.  Differences in the diet of the male and female tui (Prosthemadera novaeseelandiae: Meliphagidae) , 1985 .

[69]  B. Macmillan.  Food of house sparrows and greenfinches in a mixed farming district, Hawke's Bay, New Zealand , 1981 .

[70]  N. C. FOXl.  ORGANOCHLORINE RESIDUES IN NEW ZEALAND BIRDS OF PREY , 2005 .

[71]  J. Mclennan,et al.  Predation by the rook, Corvus frugilegus L.,on larvae of the grass grub, Costelytra zealandica (White),in Hawke’s Bay, New Zealand , 1983 .

[72]  M. Clout,et al.  The importance of birds as browsers, pollinators and seed dispersers in New Zealand forests , 1989 .

[73]  K. Evans,et al.  Changes in egg size of exotic passerines introduced to New Zealand , 2005 .

[74]  C. MacLeod,et al.  Crop use by introduced bird species in winter in relation to crop structure and seed resources , 2007 .

[75]  V. Brown,et al.  The management of lowland neutral grasslands in Britain: effects of agricultural practices on birds and their food resources , 2001 .

[76]  A. Moeed.  Diets of adult and nestling starlings (Sturnus vulgaris) in Hawke's Bay, New Zealand. , 1980 .

[77]  Eric Pawson,et al.  Environmental Histories of New Zealand , 2002 .

[78]  M. McCabe.  Presidential address. , 1970, Irish nurses' journal.

[79]  M. Whittingham,et al.  The management of crop structure: a general approach to reversing the impacts of agricultural intensification on birds? , 2005 .

[80]  D. G. Dawson.  Estimation of grain loss due to sparrows (passer domesticus) in New Zealand , 1970 .

[81]  P. Reimer,et al.  A wiggle-match date for Polynesian settlement of New Zealand , 2003, Antiquity.