Contents
XVII
22.6.2 Mineral Nitrogen ................................................................................... 322
22.6.3 Mineral Nitrogen Mobility ................................................................... 325
22.7 Overall Effects of Clear-Cutting and Slash-Burning
on Soil Fertility ...................................................................................... 326
References ......... ................................................................................................ 317
23
Functional Responses to Thinning
C.A. Gracia, S. Sabate, J.M. Martinez, and E. Albeza ........................... 329
23.1 Introduction ........................................................................................... 329
23.2 Experimental Design ............................................................................ 329
23.3 Stem Growth Increase ........................................................................... 330
23.4 Leaf Population Dynamics After Thinning ........................................ 331
23.5 Leaf Water Potential.............................................................................. 332
23.6 Effect of Treatments on Gas Exchange ................................................ 333
23.6.1 Photosynthesis and Leaf Conductance ............................................... 333
23.6.2 Differences of A and gs, Along the Vertical Canopy ProfIle .............. 334
23.6.3 Differences Between Resprouts ........................................................... 335
23.6.4 Instantaneous Water Use Efficiency and Productivity ...................... 336
23.7 Conclusions ............................................................................................ 336
References ......................................................................................................... 337
Part 7 Animals in the Forest: Ecology of Two Main Groups ......... 339
24
Soil Arthropods
P. Andres, E. Mateos, and C. Ascaso ..................................................... 341
24.1 Introduction ........................................................................................... 341
24.2 Hypogeal Arthropods ........................................................................... 341
24.2.1 Density, Abundance and Trophic Characteristics .............................. 341
24.2.2 Spatial Structure .................................................................................... 343
24.2.3 Seasonal Pattern .................................................................................... 344
24.2.4 Main Hypogeal Decomposers: Oribatid Mites and Collembola ....... 346
24.3 Effects of Fire on Soil Arthropods ....................................................... 347
24.4 Epigeal Arthropods ............................................................................... 349
24.4.1 Density, Abundance and Trophic Characteristics .............................. 349
24.4.2 Seasonal Pattern .................................................................................... 350
24.4.3 Epigeal Predators................................................................................... 351
24.5 The "Soil Arthropod Community" ...................................................... 352
References ......................................................................................................... 352
XVII
22.6.2 Mineral Nitrogen ................................................................................... 322
22.6.3 Mineral Nitrogen Mobility ................................................................... 325
22.7 Overall Effects of Clear-Cutting and Slash-Burning
on Soil Fertility ...................................................................................... 326
References ......... ................................................................................................ 317
23
Functional Responses to Thinning
C.A. Gracia, S. Sabate, J.M. Martinez, and E. Albeza ........................... 329
23.1 Introduction ........................................................................................... 329
23.2 Experimental Design ............................................................................ 329
23.3 Stem Growth Increase ........................................................................... 330
23.4 Leaf Population Dynamics After Thinning ........................................ 331
23.5 Leaf Water Potential.............................................................................. 332
23.6 Effect of Treatments on Gas Exchange ................................................ 333
23.6.1 Photosynthesis and Leaf Conductance ............................................... 333
23.6.2 Differences of A and gs, Along the Vertical Canopy ProfIle .............. 334
23.6.3 Differences Between Resprouts ........................................................... 335
23.6.4 Instantaneous Water Use Efficiency and Productivity ...................... 336
23.7 Conclusions ............................................................................................ 336
References ......................................................................................................... 337
Part 7 Animals in the Forest: Ecology of Two Main Groups ......... 339
24
Soil Arthropods
P. Andres, E. Mateos, and C. Ascaso ..................................................... 341
24.1 Introduction ........................................................................................... 341
24.2 Hypogeal Arthropods ........................................................................... 341
24.2.1 Density, Abundance and Trophic Characteristics .............................. 341
24.2.2 Spatial Structure .................................................................................... 343
24.2.3 Seasonal Pattern .................................................................................... 344
24.2.4 Main Hypogeal Decomposers: Oribatid Mites and Collembola ....... 346
24.3 Effects of Fire on Soil Arthropods ....................................................... 347
24.4 Epigeal Arthropods ............................................................................... 349
24.4.1 Density, Abundance and Trophic Characteristics .............................. 349
24.4.2 Seasonal Pattern .................................................................................... 350
24.4.3 Epigeal Predators................................................................................... 351
24.5 The "Soil Arthropod Community" ...................................................... 352
References ......................................................................................................... 352