Comparing culture and ecology: conservation planning of oak woodlands in Mediterranean landscapes of Portugal and California

SUMMARY Mediterranean ecosystems are biodiversity hotspots, however translating conservation need into implementation has been hindered by their function as working landscapes that integrate both human and natural components. This paper compares oak woodland working landscapes in California and Portugal: can conservation policy be reshaped to conserve Mediterranean oak woodland ecosystems with differing sociopolitical cultural contexts? Each oak woodland's cultural-historical legacy and socioecological system (SES) is described, and how each system can cross-inform improvements to conservation policies is assessed. The SES analysis shows that oak woodlands are managed to maximize revenue from one or more of four resources: forestry, rangeland, agriculture and natural areas. Sustainability of extractable resources may be threatened by replacement rate, land-use history and interdependence with other resources. Non-extractable resources (natural areas) are more volatile and sustainable management is dependent on the voluntary nature of collective-choice rules. Conservation planning and implementation require attention to the characteristic heterogeneity of oak woodlands and to the processes that generate biodiversity, such as fire and regeneration. Conservation plans should aim for the preservation of oak woodland functions (for example multiple use systems) and cultural characteristics (such as keeping people on the land), and governmental and public recognition of the value of preserving these woodlands.

[1]  Teresa Pinto-Correia,et al.  Bridging the Gap between Centrally Defined Policies and Local Decisions – Towards more Sensitive and Creative Rural Landscape Management , 2006, Landscape Ecology.

[2]  Kirk R. Klausmeyer,et al.  Expanding the Global Network of Protected Areas to Save the Imperiled Mediterranean Biome , 2009, Conservation biology : the journal of the Society for Conservation Biology.

[3]  Francisco Moreira,et al.  Are drought and wildfires turning Mediterranean cork oak forests into persistent shrublands? , 2009, Agroforestry Systems.

[4]  H. Pereira,et al.  Assessing Ecosystem Services at Different Scales in the Portugal Millennium Ecosystem Assessment , 2007 .

[5]  F. Valladares,et al.  How Much Ecology Do We Need to Know to Restore Mediterranean Ecosystems? , 2007 .

[6]  Y. Carmel,et al.  The Paradigm of Landscape and the Paradigm of Ecosystem - Implications for Land Planning and Management in the Mediterranean Region , 2002 .

[7]  Steven M. de Jong,et al.  Spatial patterns of Mediterranean land abandonment and related land cover transitions , 2007, Landscape Ecology.

[8]  L. Gillson,et al.  Demything “wilderness”: implications for protected area designation and management , 2006, Biodiversity and Conservation.

[9]  B. Meatyard.  Biology and Wildlife of the Mediterranean Region , 2000 .

[10]  Todd Keeler-Wolf,et al.  A Manual of California Vegetation , 2004, Biodiversity & Conservation.

[11]  C. D’Antonio,et al.  COMPETITION BETWEEN NATIVE PERENNIAL AND EXOTIC ANNUAL GRASSES: IMPLICATIONS FOR AN HISTORICAL INVASION , 2004 .

[12]  Serge Rambal,et al.  Mediterranean terrestrial ecosystems: research priorities on global change effects , 1998 .

[13]  Philip W. Rundel,et al.  Landscape Disturbance and Biodiversity in Mediterranean-Type Ecosystems , 1998 .

[14]  D. Olson,et al.  The Global 200: A Representation Approach to Conserving the Earth’s Most Biologically Valuable Ecoregions , 1998 .

[15]  J. Blondel.  The ‘Design’ of Mediterranean Landscapes: A Millennial Story of Humans and Ecological Systems during the Historic Period , 2006 .

[16]  M. Scheffer,et al.  El Niño as a Window of Opportunity for the Restoration of Degraded Arid Ecosystems , 2001, Ecosystems.

[17]  J. C. Hickman,et al.  The Jepson Manual: Higher Plants of California , 1993 .

[18]  S. Schneider,et al.  Emissions pathways, climate change, and impacts on California. , 2004, Proceedings of the National Academy of Sciences of the United States of America.

[19]  J. Michaelsen,et al.  Interactions of Factors Affecting Seedling Recruitment of Blue Oak (Quercus Douglasii) in California , 1989 .

[20]  R. Howitt,et al.  Multiple use management of California's hardwood rangelands. , 1993 .

[21]  R. Mittermeier,et al.  Biodiversity hotspots for conservation priorities , 2000, Nature.

[22]  Kalliopi Radoglou,et al.  Forests of the Mediterranean region : gaps in knowledge and research needs , 2000 .

[23]  João Santos Pereira,et al.  Cork oak woodlands on the edge: Ecology, adaptive management, and restoration , 2009 .

[24]  J. Keeley,et al.  Fire Management Impacts on Invasive Plants in the Western United States , 2006, Conservation biology : the journal of the Society for Conservation Biology.

[25]  L. Huntsinger,et al.  Working Woodlands: Public Demand, Owner Management, and Government Intervention in Conserving Mediterranean Ranches and Dehesas 1 , 2002 .

[26]  R. Peacock.  Cork Oak Woodlands on the Edge: Ecology, Adaptive Management, and Restoration , 2011 .

[27]  A. Farina.  The Cultural Landscape as a Model for the Integration of Ecology and Economics , 2000 .

[28]  R. H. G. Jongman,et al.  The new dimensions of the European landscape , 2004 .

[29]  M. Castro.  Silvopastoral Systems in Portugal: Current Status and Future Prospects , 2009 .

[30]  S. Rambal,et al.  The dehesa system of southern Spain and Portugal as a natural ecosystem mimic , 1999, Agroforestry Systems.

[31]  Joshua H. Viers,et al.  Threats and biodiversity in the mediterranean biome , 2009 .

[32]  David M. Rizzo,et al.  Sudden oak death: endangering California and Oregon forest ecosystems , 2003 .

[33]  L. Sloan,et al.  Modeled regional climate change and California endemic oak ranges. , 2005, Proceedings of the National Academy of Sciences of the United States of America.

[34]  L. Huntsinger,et al.  Oak woodland ranchers in California and Spain: conservation and diversification , 2004 .

[35]  K. Casey,et al.  Inventory of Oaks on California's National Forest Lands 1 , 2002 .

[36]  Sandra Lavorel,et al.  Ecological diversity and resilience of Mediterranean vegetation to disturbance , 1999 .

[37]  M. Schwartz,et al.  Biotic homogenization of the California flora in urban and urbanizing regions. , 2006 .

[38]  L. Huntsinger,et al.  A Comparison of Management Strategies in the Oak Woodlands of Spain and California , 1991 .

[39]  E. Chuvieco,et al.  Applying Local Measures of Spatial Heterogeneity to Landsat-TM Images for Predicting Wildfire Occurrence in Mediterranean Landscapes , 2006, Landscape Ecology.

[40]  H. Allen.  Response of past and present Mediterranean ecosystems to environmental change , 2003 .

[41]  J. Bissonette,et al.  Landscape Ecology and Resource Management: Linking Theory with Practice , 2003 .

[42]  S. Polasky,et al.  CONSERVING SPECIES IN A WORKING LANDSCAPE: LAND USE WITH BIOLOGICAL AND ECONOMIC OBJECTIVES , 2005 .

[43]  G. Guthey,et al.  Land Trusts and Conservation Easements: Who Is Conserving What for Whom? , 2004 .

[44]  S. Perakis,et al.  Imprint of oaks on nitrogen availability and δ15N in California grassland-savanna: a case of enhanced N inputs? , 2007, Plant Ecology.

[45]  N. Boatman,et al.  Ecological impacts of early 21st century agricultural change in Europe--a review. , 2009, Journal of environmental management.

[46]  H. Mooney,et al.  Broadening the Extinction Debate: Population Deletions and Additions in California and Western Australia , 1998 .

[47]  L. Huntsinger,et al.  Ecological dynamics of Quercus dominated woodlands in California and southern Spain: a state-transition model , 1992, Vegetatio.

[48]  H. Reid.  Climate Change and Biodiversity in Europe , 2006 .

[49]  Miguel B. Araújo,et al.  Distribution patterns of biodiversity and the design of a representative reserve network in Portugal , 1999 .

[50]  T. Plieninger,et al.  Effects of land-use history on size structure of holm oak stands in Spanish dehesas: implications for conservation and restoration , 2003, Environmental Conservation.

[51]  F. Davis,et al.  Demography and Recruitment Limitations of Three Oak Species in California , 2006, The Quarterly Review of Biology.

[52]  Deborah J. Pain,et al.  Farming and birds in Europe: the common agricultural policy and its implications for bird conservation , 1997 .

[53]  L. Huntsinger,et al.  California's privately owned oak woodlands: owners, use, and management. , 1990 .

[54]  Thomas J. Wilbanks,et al.  Bridging scales and knowledge systems: concepts and applications in ecosystem assessment , 2006 .

[55]  T. D. Mitchell,et al.  Ecosystem Service Supply and Vulnerability to Global Change in Europe , 2005, Science.

[56]  Elinor Ostrom,et al.  Complexity of Coupled Human and Natural Systems , 2007, Science.

[57]  P. Alagona.  Homes on the Range: Cooperative Conservation and Environmental Change on California's Privately Owned Hardwood Rangelands , 2008, Environmental History.

[58]  P. Dallman,et al.  Plant Life in the World's Mediterranean Climates: California, Chile, South Africa, Australia, and the Mediterranean Basin , 1998 .

[59]  M. A. Zavala,et al.  Application of ecological models to landscape planning: the case of the Mediterranean basin , 1997 .

[60]  E. Zavaleta,et al.  Regional patterns of recruitment success and failure in two endemic California oaks , 2007 .

[61]  E. Ostrom.  A General Framework for Analyzing Sustainability of Social-Ecological Systems , 2009, Science.

[62]  P. Quézel,et al.  Changes and disturbances of forest ecosystems caused by human activities in the western part of the mediterranean basin , 1990, Vegetatio.

[63]  E. Ostrom.  A diagnostic approach for going beyond panaceas , 2007, Proceedings of the National Academy of Sciences.

[64]  H. Walter.  Land Use Conflicts in California , 1998 .

[65]  S. Lavorel,et al.  Diversity, stability and conservation of mediterranean‐type ecosystems in a changing world: an introduction , 1999 .

[66]  Teresa Pinto-Correia,et al.  Contribution to the extensification/intensification debate: new trends in the Portuguese montado , 1999 .

[67]  M. Holmgren,et al.  Multiple Recruitment Limitation Causes Arrested Succession in Mediterranean Cork Oak Systems , 2007, Ecosystems.

[68]  F. Chapin,et al.  Differences in species composition and diversity among Mediterranean grasslands with different history : the case of California and Spain , 1997 .

[69]  J. Pretty,et al.  Case study of agri-environmental payments: The United Kingdom , 2008 .

[70]  Vegetation recovery after fuel management in Mediterranean shrublands , 2008 .

[71]  H. Mooney,et al.  Convergence Versus Nonconvergence in Mediterranean-Climate Ecosystems , 1978 .

[72]  T. Pinto-Correia,et al.  Multifunctionality in Mediterranean landscapes: past and future , 2004 .

[73]  Paul F. Donald,et al.  Habitat connectivity and matrix restoration: the wider implications of agri‐environment schemes , 2006 .

[74]  D. Lindenmayer,et al.  Scattered trees are keystone structures – Implications for conservation , 2006 .

[75]  M. Antrop.  The transformation of the Mediterranean landscapes: an experience of 25 years of observations , 1993 .

[76]  T. Plieninger.  Compatibility of livestock grazing with stand regeneration in Mediterranean holm oak parklands , 2007 .

[77]  M. Araújo.  The coincidence of people and biodiversity in Europe , 2003 .

[78]  James C. Hickman,et al.  The Jepson Manual: Higher Plants of California , 1993 .

[79]  J. Blondel.  On humans and wildlife in Mediterranean islands , 2008 .

[80]  G. Huylenbroeck,et al.  Landscape Amenities: Economic Assessment of Agricultural Landscapes , 2005 .

[81]  T. Plieninger,et al.  Effects of land-use and landscape structure on holm oak recruitment and regeneration at farm level in Quercus ilex L. dehesas , 2004 .