SEED DISPERSAL AND THE HOLOCENE MIGRATION OF WOODLAND HERBS
The distribution of many woodland herbs extends 1000-2000 km in a north- south direction, yet the majority of these species grow clonally, have little recruitment by seed, and possess no obvious…
Leaf Quality and Enemy Avoidance by the Larvae of a Pyralid Moth
- H. Damman
- Environmental Science
- 1 February 1987
The results suggest that slow growth need not invariably lead to greater exposure of herbivores to natural enemies, and that protection from enemies was more important than nutrient to the larvae.
CLONAL GROWTH AND RAMET PERFORMANCE IN THE WOODLAND HERB, ASARUM CANADENSE
As has been observed for some other clonal plant species, few costs were found for either sexual or asexual reproduction and Asarum canadense appears to be under unusually strong selection for seedling survival.
The osmaterial glands of the swallowtail butterfly Eurytides marcellus as a defence against natural enemies
- H. Damman
- Environmental Science
- 1 August 1986
The seasonal decline in effectiveness of osmateria in deterring natural enemies probably stems from a reduction in the importance of the predators that are repelled by osmeteria.
Defence and development in a gregarious leaf‐mining beetle
- H. Damman
- Environmental Science
- 1 November 1994
Field experiments indicated that larvae hatching from larger clutches of eggs stood a greater chance of surviving to pupation, primarily because larvae hatch in groups proved more successful at initiating leaf mines.
Nitrogen Content of Food Plants and Vulnerability of Pieris Rapae to Natural Enemies
Testing the commonly made assumption that reduction in leaf quality reduces the survivorship of herbivores indirectly by increasing their exposure to natural enemies found that on low- nitrogen plants caterpillars both developed more slowly and devoted more of their time to feeding than on high-nitrogen plants.
Population growth and viability analyses of the clonal woodland herb, Asarum canadense
Investigation of the relative impact of reproduction and survival on the persistence of populations of the North American woodland herb, Asarum canadense found sexual and clonal reproduction had less impact on population growth than did survival, and seedling recruitment was important, as indicated by the relatively high rates of genet turnover.
Oviposition Behaviour and Clutch Size in a Group-Feeding Pyralid Moth, Omphalocera munroei
- H. Damman
- Biology
- 1 February 1991
Facilitative interactions between two lepidopteran herbivores of Asimina
- H. Damman
- Environmental ScienceOecologia
- 1 February 1989
The combination of regular, severe defoliation by Omphalocera and lack of a defensive response to damage by Asimina lead to a positive affect of OmphalOCera on Eurytides population size, and may be central to other facilitative interactions between herbivores as well.
...
...