Mediterranean terrestrial ecosystems: research priorities on global change effects

Ecosystems of the Mediterranean Basin are suggested as model regions for global change research, particularly in relation to the importance of land use changes. The large body of preexisting ecological knowledge should facilitate progress on complex issues relating to interactions among multiple drivers of global change, including climate, atmospheric, land use and socio-economic changes. Four research areas appear as priorities in relation to pressing needs for prediction: (1) fire regimes and effects; (2) feedbacks from the land to the atmosphere; (3) water availability and quality; and (4) changes in ecological diversity. We summarize current knowledge and present future directions for research in these areas. While a number of the topics outlined as priorities are presently addressed by ongoing studies, some of the future challenges will lie in appropriate coordination and synthesis of that research. We suggest that this structuring effort could serve as an example to be applied in other MTEs and across MTEs.

[1]  Josep Piñol,et al.  Climate Warming, Wildfire Hazard, and Wildfire Occurrence in Coastal Eastern Spain , 1998 .

[2]  Jeremy S. Fried,et al.  Predicting the impacts of global warming on wildland fire , 1992 .

[3]  Harold A. Mooney,et al.  Mediterranean type ecosystems. Origin and structure , 1975, Pedobiologia.

[4]  Peter S. Eagleson,et al.  Ecological optimality in water‐limited natural soil‐vegetation systems: 1. Theory and hypothesis , 1982 .

[5]  W. Oechel,et al.  Direct Effects of Elevated CO2 in Chaparral and Mediterranean-Type Ecosystems , 1995 .

[6]  J. Michaelsen,et al.  Sensitivity of Fire Regime in Chaparral Ecosystems to Climate Change , 1995 .

[7]  Walter C. Oechel,et al.  Global Change and Mediterranean-Type Ecosystems , 1995, Ecological Studies.

[8]  W. Hargrove,et al.  Effects of fire on landscape heterogeneity in Yellowstone National Park, Wyoming , 1994 .

[9]  Piers J. Sellers,et al.  Amazonian Deforestation and Regional Climate Change , 1991 .

[10]  A. Knapp,et al.  9 – Ecosystem-Level Responses of Tallgrass Prairie to Elevated CO2 , 1996 .

[11]  J. Moreno,et al.  Sensitivity of fire occurrence to meteorological variables in Mediterranean and Atlantic areas of Spain , 1993 .

[12]  Z. Naveh Conservation, Restoration, and Research Priorities for Mediterranean Uplands Threatened by Global Climate Change , 1995 .

[13]  Richard J. Hobbs,et al.  Mediterranean-Type Ecosystems: Opportunities and Constraints for Studying the Function of Biodiversity , 1995 .

[14]  G. Malanson,et al.  Modeling interactive effects of climate change, air pollution, and fire on a California Shrubland , 1991 .

[15]  S. Rambal,et al.  Water Balance of Mediterranean Ecosystems Under a Changing Climate , 1995 .

[16]  G. J. Collatz,et al.  Comparison of Radiative and Physiological Effects of Doubled Atmospheric CO2 on Climate , 1996, Science.

[17]  J. Moreno,et al.  Patterns of Fire Occurrence Across a Climatic Gradient and Its Relationship to Meteorological Variables in Spain , 1995 .

[18]  H. Mooney,et al.  Mediterranean Type Ecosystems , 1973, Ecological Studies.

[19]  S. Rambal Fire and Water Yield: A Survey and Predictions for Global Change , 1994 .

[20]  F. Chapin,et al.  8 – The Jasper Ridge CO2 Experiment: Design and Motivation , 1996 .

[21]  J. A. Ludwig,et al.  Rehabilitation of Semiarid Landscapes in Australia. I. Restoring Productive Soil Patches , 1996 .

[22]  J. Terradas,et al.  Using Catchments of Contrasting Hydrological Conditions to Explore Climate Change Effects on Water and Nutrient Flows in Mediterranean Forests , 1995 .

[23]  G. Seufert,et al.  Volatile Organics in Mediterranean Shrubs and Their Potential Role in a Changing Environment , 1995 .

[24]  D. Richardson,et al.  Biodiversity and ecosystem processes: Opportunities in Mediterranean-type ecosystems. , 1993, Trends in ecology & evolution.

[25]  R. Cowling,et al.  Plant diversity in mediterranean-climate regions. , 1996, Trends in ecology & evolution.

[26]  W. Oechel,et al.  Fire Intensity as a Determinant Factor of Postfire Plant Recovery in Southern California Chaparral , 1994 .

[27]  M. Arroyo,et al.  Ecology and Biogeography of Mediterranean Ecosystems in Chile, California, and Australia , 1995, Ecological Studies.

[28]  W. Bond Effects of Global Change on Plant—Animal Synchrony: Implications for Pollination and Seed Dispersal in Mediterranean Habitats , 1995 .

[29]  Ulrich Cubasch,et al.  Estimates of climate change in Southern Europe derived from dynamical climate model output , 1996 .