Sex-biased herbivory in arroyo willow: are there general patterns among herbivores? [Salix lasiolepis, Coptodisca, Eriophytes]

The phenomenon of sex-biased variation in herbivore attack of dioecious plants has generated much recent interest among ecologists. In a recent study, we discovered that plant sex was an important predictor of densities of a guild of gall-forming sawflies: male clones of arroyo willow, Salix lasiole...

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Bibliographic Details
Published in:Oikos 1994-11, Vol.71 (2), p.267-272
Main Authors: Boecklen, W.J. (New Mexico State Univ., Las Cruces (USA). Dept. of Biology), Mopper, S, Price, P.W
Format: Article
Language:English
Subjects:
ACARIEN GALLICOLE
ACAROS ERIOFIDOS
Arroyos
AZOTE
COMPOSE PHENOLIQUE
COMPUESTOS FENOLICOS
CONTENIDO MINERAL
Correlation coefficients
DENSIDAD DE LA POBLACION
DENSITE DE POPULATION
ENVIRONMENTAL FACTORS
ERIOPHYIDAE
FACTEUR DU MILIEU
FACTORES AMBIENTALES
FEMALES
FEMELLE
FOSFORO
GALL CAUSING MITES
GENOTIPOS
GENOTYPE
GENOTYPES
Gracillariidae
HEMBRA
HERBIVORE
HERBIVORES
HERBIVOROS
HOST PARASITE RELATIONS
Intersex persons
Leafminers
LEPIDOPTERA
MACHO
MALE
MALES
MINERAL CONTENT
Mites
NITROGEN
NITROGENO
PESTS OF PLANTS
PHENOLIC COMPOUNDS
PHOSPHORE
PHOSPHORUS
PHYLLONORYCTER
PLAGAS DE PLANTAS
POPULATION DENSITY
POTASIO
POTASSIUM
RAVAGEUR DES PLANTES
RELACIONES HUESPED PARASITO
RELATION HOTE PARASITE
SALIX
Salix lasiolepis
Sawflies
TENEUR EN ELEMENTS MINERAUX
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Summary:The phenomenon of sex-biased variation in herbivore attack of dioecious plants has generated much recent interest among ecologists. In a recent study, we discovered that plant sex was an important predictor of densities of a guild of gall-forming sawflies: male clones of arroyo willow, Salix lasiolepis, supported significantly higher sawfly densities than did females. To test the generality of this phenomenon, we here examine the relationship between willow sex and densities of a different group of herbivores that includes two leaf-mining lepidopterans, a gall-forming mite, and a gall-forming fly. In contrast to our earlier findings, there was no relationship between plant sex and herbivore densities. Consistent with our previous study, both environment (year) and plant genotype (clone) exerted significant effects on herbivore density. These results imply that some factors that strongly affect the abundance of one set of herbivores may have little relevance to a different set of herbivores attacking the same host, suggesting that the development of a general theory of sex-biased herbivory may require numerous and varied case studies.
ISSN:0030-1299
1600-0706
DOI:10.2307/3546275