Tropical Forest Community Ecology

142 Egbert G. Leigh, Jr Schwendenmann, L.C. (2002) Below-ground Carbon Dynamics as a Function of Climate Variability in Undistur ...

Chapter 9 APPROACHINGECOLOGICAL COMPLEXITYFROMTHE PERSPECTIVEOFSYMMETRIC NEUTRALTHEORY Stephen P. Hubbell OVERVIEW I argue, seem ...

144 Stephen P. Hubbell program in theoretical and empirical ecology. Using this approach, profound discoveries reveal- ing the n ...

Symmetric Neutral Theory 145 published obscurely (Hubbell 1995, 1997), was the result, also discovered independently by Graham B ...

146 Stephen P. Hubbell we expect? This is clearly a non-equilibrium com- munity in the taxonomic sense because any given species ...

Symmetric Neutral Theory 147 must sum to unity, we can find the value ofP0,k from this sum, and all other terms as well. Actuall ...

148 Stephen P. Hubbell is almost hyperbolic in shape (i.e.,〈φn〉≈θ/n whenxis very close to unity). Preston con- cluded that the s ...

Symmetric Neutral Theory 149 and common species become commoner. This is because, under low immigration rates, when rare species ...

150 Stephen P. Hubbell 0 50 100 150 200 0.95 1.00 1.05 1.10 1.15 1.20 Per capita birth rate/death rate c = 1 c = 100 b(n) = d(n) ...

Symmetric Neutral Theory 151 30 BCI Log 2 species abundance Dispersal limitation mechanism Density dependence mechanism No. of s ...

152 Stephen P. Hubbell Third, fitting issues aside, I have more fun- damental problems with the lognormal hypoth- esis. First of ...

Symmetric Neutral Theory 153 predict depends on whether the metacommunity is large and continuous, or is an archipelago of very ...

154 Stephen P. Hubbell Table 9.2 Changes in abundance in Barro Colorado Island tree species in the 50 ha plot over a 23-year int ...

Symmetric Neutral Theory 155 To test the predictions of neutral theory and a drifting community, we first had to consider whethe ...

156 Stephen P. Hubbell Janzen (1970) and Connell (1971) indepen- dently suggested that an interaction between seed dispersal and ...

Symmetric Neutral Theory 157 CONCLUSIONS Neutral theory should be viewed and used as a powerful tool in advancing the ecological ...

158 Stephen P. Hubbell humanity and non-human life on earth. To suc- cessfully meet this daunting challenge, we will need to sig ...

Symmetric Neutral Theory 159 Panama. In J. Losos and R.E. Ricklefs (eds)The The- ory of Island Biogeography at 40: Impacts and P ...

Chapter 10 FUNCTIONALBASISFOR RESOURCENICHEPARTITIONING BYTROPICALTREES Kaoru Kitajima and Lourens Poorter OVERVIEW The resource ...

Resource Niche and Trade-offs 161 more types of resources are required to allow coexistence in theoretical models that consider ...