On the Use of Stable Isotopes in Trophic Ecology
This work expects progress in SIA resulting from standardization of methods and models, calibration of model parameters through experimentation, andContinuing to be a useful tool in reconstructing diets, characterizing trophic relationships, elucidating patterns of resource allocation, and constructing food webs.
GENETIC ANALYSIS OF HYBRID ZONES: NUMBERS OF MARKERS AND POWER OF RESOLUTION
The use of molecular genetic techniques is becoming increasingly widespread in analyses of hybrid zones. Yet, exactly how many molecular markers are required to provide a given degree of resolution…
Nestedness, biogeographic theory, and the design of nature reserves
- W. Boecklen
- Environmental ScienceOecologia
- 1 September 1997
The relationship between nested distributional patterns and the degree to which several small reserves will contain more species than would a single reserve of equal total area (SLOSS) is examined.
HOW DISCRETE ARE OAK SPECIES? INSIGHTS FROM A HYBRID ZONE BETWEEN QUERCUS GRISEA AND QUERCUS GAMBELII
- D. J. Howard, R. Preszler, J. Williams, S. Fenchel, W. Boecklen
- BiologyEvolution; international journal of organic…
- 1 June 1997
A set of RAPD markers that distinguish between the white oaks Quercus gambelii and Q. grisea are described and used to examine patterns of gene exchange in an area of contact in the San Mateo Mountains of New Mexico, confirming that hybridization between the two species takes place.
Structure of herbivore communities in two oak (Quercus spp.) hybrid zones
In both species complexes, hybrid hosts typically supported significantly lower densities and species diversity of parasites than did parental types, which contradicts the findings of Whitham (1989) that suggested that hybrid hosts may act as parasite sinks both in ecological and evolutionary time.
SANTA ROSALIA RECONSIDERED: SIZE RATIOS AND COMPETITION
- D. Simberloff, W. Boecklen
- Environmental ScienceEvolution; international journal of organic…
- 1 November 1981
Interest in the importance of size differences for coexistence has led to two related ideas, codified in textbooks and cited very frequently.
Reproductive processes in two oak (Quercus) contact zones with different levels of hybridization
Early postfertilization processes play a strong role in species fidelity in these oaks, and the Environmental Emasculation Hypothesis that posits that environmental stress can increase the probability of hybrid formation by reducing the competitive ability of male gametes of one species is proposed is proposed.
Patterns of Extinction in the Introduced Hawaiian Avifauna: A Reexamination of the Role of Competition
It is proposed that the following patterns are true: (1) Extinction rate as a function of number of species present (S) is not better fit by addition of an S2 term, and bill-length differences between pairs of species that invaded together may tend to be less for pairs in which at least one species became extinct.
The Grinnellian Niche of the Wood Thrush
- F. C. James, R. Johnston, Noel O. Wamer, G. Niemi, W. Boecklen
- Environmental ScienceAmerican Naturalist
- 1 July 1984
Our results suggest that the limits of the breeding range of the wood thrush and its relative abundance within its range are not highly related to the presence of ecologically similar species. These…
Sex and Drugs and Herbivores: Sex‐Biased Herbivory in Arroyo Willow (Salix Lasiolepis)
Of the dimorphic traits, only variation in leaf phenology is a consistent predictor of variation in sawfly densities among willow clones.