58
J. Canadell, A. Djema, B. L6pez, F. 1., S. Sabate, D. Siscart and C.A. Gracia
Hoffmann A, Kummerow J (1978) Root studies in the Chilean matorral. Oecologia 32:57-69
Jackson RB, Canadell J, Ehleringer JR, Mooney HA, Sala OE, Schulze E-D (1996) A global analysis of root distributions for terrestrial biomes. Oecologia 108:398-411
James S (1984) Lignotubers and burls -their structure, function and ecological significance in
Mediterranean ecosystems. Bot Rev 50:225-266
Joslin JD, Henderson GS (1987) Organic matter and nutrients associated with fine root turnover
in a white oak stand. For Sci 33:330-346
Keeley JE (1988) Population variation in root grafting and a hypothesis. Oikos 52:364-366
Lewis DC, Burgy RH (1964) The relationship between oak tree roots and groundwater in fractured rock as determined by tritium tracing. J Geophys Res 69:2579-2588
Liu X, Tyree MT (1997) Root carbohydrate reserves, mineral nutrient concentrations and biomass in a healthy and a declining sugar maple (Acer saccharum) stand. Tree PhysioI17:179-185
L6pez B, Sabate S, Gracia CA (1996) An inflatable minirhizotron system for stony soils. Plant
Soil 179:255-260
Lopez B, Sabate S, Gracia CA (1998) Fine roots dynamics in a Mediterranean forest: effects of
drought and stem density. Tree PhysioI18:601-606
McClaugherty CA, Aber JD, Melillo JM (1982) The role of fine roots in the organic matter and
nitrogen budgets of two forested ecosystems. Ecology 63:1481-1490
Melillo JM, McGuire AD, Kicklighter DW, Moore B III, Vorosmarty CJ, Schloss AL (1993) Global
climate change and terres.irial net primary production. Nature 363:234-240
Molinas ML, Verdaguer D (1993a) Lignotuber ontogeny in the cork-oak (Quercus suber; Fagaceae). I. Late embryo. Am J Bot 80: 172-181
Molinas ML, Verdaguer D (1993b) Lignotuber ontogeny in the cork-oak (Quercus suber; Fagaceae). II. Germination and young seedling. Am J Bot 80:182-191
Montenegro G, Avila G, Schatte P (1983) Presence and development of lignotubers in shrubs of
the Chilean matorral. Can J Bot 61:1804-1808
Mullete KJ, Bamber RK (1978) Studies of the lignotubers of Eucalyptus gummifera (Gaertn. &
Hoch.). III. Inheritance and chemical composition. Aust J Bot 26:23-28
Nepstad DC, de Carvalho CR, Davidson EA, Jipp PH, Lefebvre PA, Negreiros GH, da Silva ED,
Stone TA, Trumbore SE, Vieira S (1994) The role of deep roots in the hydrological and carbon
cycles of Amazonian forests and pastures. Nature 372:666-669
Oechel WC, Lawrence L (1981) Carbon allocation and utilization. In: Miller PC (ed) Resource
use by chaparral and matorral. Springer, Berlin, pp 185-235
Potter CS, Randerson JT, Field CB, Matson PA, Vitousek PM, Mooney HA, Klooster SA (1993)
Terrestrial ecosystem production: a process model based on global satellite and surface data.
Global Biogeochem Cycles 7:811-841
Prentice IC, Cramer W, Harrison SP, Leemans R, Monserud RA, Solomon AM (1992) A global
biome model based on plant physiology and dominance, soil properties and climate. J Biogeogr 19:117-134
Richter DD, Makewitz D (1995) How deep is soil? BioScience 45:600-609
Rodin LE, Bazilevich NI (1967) Production and mineral cycling in terrestrial vegetation. Oliver
and Boyd, London
Rundel PW (1980) Adaptations of Mediterranean-climate oaks to environmental stress. In:
Ecology, management, and utilization of California oaks. USDA For Serv Gen Tech Rep PSW44:43-54
Sabate S, Djema A, Gracia C, L6pez B (1998) Effects of thinning on belowground biomass of a
growth stagnated old coppice Mediterranean Quercus ilex 1. forest. Tree Physiol (submitted)
Santantonio D, Hermann RK, Overton WS (1977) Root biomass studies in forest ecosystems. Pedobiologia 17:1-31
Schulze E-D, Bauer G, Buchmann N, Can adell J, Ehleringer JR, Jackson RB, Jobbagy E, Loreti J,
Mooney HA, Oesterheld M, Sala OE (1996) Water availability, rooting depth, and vegetation
zones along an aridity gradient in Patagonia. Oecologia 108:503-511
J. Canadell, A. Djema, B. L6pez, F. 1., S. Sabate, D. Siscart and C.A. Gracia
Hoffmann A, Kummerow J (1978) Root studies in the Chilean matorral. Oecologia 32:57-69
Jackson RB, Canadell J, Ehleringer JR, Mooney HA, Sala OE, Schulze E-D (1996) A global analysis of root distributions for terrestrial biomes. Oecologia 108:398-411
James S (1984) Lignotubers and burls -their structure, function and ecological significance in
Mediterranean ecosystems. Bot Rev 50:225-266
Joslin JD, Henderson GS (1987) Organic matter and nutrients associated with fine root turnover
in a white oak stand. For Sci 33:330-346
Keeley JE (1988) Population variation in root grafting and a hypothesis. Oikos 52:364-366
Lewis DC, Burgy RH (1964) The relationship between oak tree roots and groundwater in fractured rock as determined by tritium tracing. J Geophys Res 69:2579-2588
Liu X, Tyree MT (1997) Root carbohydrate reserves, mineral nutrient concentrations and biomass in a healthy and a declining sugar maple (Acer saccharum) stand. Tree PhysioI17:179-185
L6pez B, Sabate S, Gracia CA (1996) An inflatable minirhizotron system for stony soils. Plant
Soil 179:255-260
Lopez B, Sabate S, Gracia CA (1998) Fine roots dynamics in a Mediterranean forest: effects of
drought and stem density. Tree PhysioI18:601-606
McClaugherty CA, Aber JD, Melillo JM (1982) The role of fine roots in the organic matter and
nitrogen budgets of two forested ecosystems. Ecology 63:1481-1490
Melillo JM, McGuire AD, Kicklighter DW, Moore B III, Vorosmarty CJ, Schloss AL (1993) Global
climate change and terres.irial net primary production. Nature 363:234-240
Molinas ML, Verdaguer D (1993a) Lignotuber ontogeny in the cork-oak (Quercus suber; Fagaceae). I. Late embryo. Am J Bot 80: 172-181
Molinas ML, Verdaguer D (1993b) Lignotuber ontogeny in the cork-oak (Quercus suber; Fagaceae). II. Germination and young seedling. Am J Bot 80:182-191
Montenegro G, Avila G, Schatte P (1983) Presence and development of lignotubers in shrubs of
the Chilean matorral. Can J Bot 61:1804-1808
Mullete KJ, Bamber RK (1978) Studies of the lignotubers of Eucalyptus gummifera (Gaertn. &
Hoch.). III. Inheritance and chemical composition. Aust J Bot 26:23-28
Nepstad DC, de Carvalho CR, Davidson EA, Jipp PH, Lefebvre PA, Negreiros GH, da Silva ED,
Stone TA, Trumbore SE, Vieira S (1994) The role of deep roots in the hydrological and carbon
cycles of Amazonian forests and pastures. Nature 372:666-669
Oechel WC, Lawrence L (1981) Carbon allocation and utilization. In: Miller PC (ed) Resource
use by chaparral and matorral. Springer, Berlin, pp 185-235
Potter CS, Randerson JT, Field CB, Matson PA, Vitousek PM, Mooney HA, Klooster SA (1993)
Terrestrial ecosystem production: a process model based on global satellite and surface data.
Global Biogeochem Cycles 7:811-841
Prentice IC, Cramer W, Harrison SP, Leemans R, Monserud RA, Solomon AM (1992) A global
biome model based on plant physiology and dominance, soil properties and climate. J Biogeogr 19:117-134
Richter DD, Makewitz D (1995) How deep is soil? BioScience 45:600-609
Rodin LE, Bazilevich NI (1967) Production and mineral cycling in terrestrial vegetation. Oliver
and Boyd, London
Rundel PW (1980) Adaptations of Mediterranean-climate oaks to environmental stress. In:
Ecology, management, and utilization of California oaks. USDA For Serv Gen Tech Rep PSW44:43-54
Sabate S, Djema A, Gracia C, L6pez B (1998) Effects of thinning on belowground biomass of a
growth stagnated old coppice Mediterranean Quercus ilex 1. forest. Tree Physiol (submitted)
Santantonio D, Hermann RK, Overton WS (1977) Root biomass studies in forest ecosystems. Pedobiologia 17:1-31
Schulze E-D, Bauer G, Buchmann N, Can adell J, Ehleringer JR, Jackson RB, Jobbagy E, Loreti J,
Mooney HA, Oesterheld M, Sala OE (1996) Water availability, rooting depth, and vegetation
zones along an aridity gradient in Patagonia. Oecologia 108:503-511