1999
DOI: 10.1890/0012-9658(1999)080[0416:phzabt]2.0.co;2
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Plant Hybrid Zones Affect Biodiversity: Tools for a Genetic-Based Understanding of Community Structure

Abstract: Plant hybrid zones are dynamic centers of ecological and evolutionary processes for plants and their associated communities. Studies in the wild and in gardens with synthetic crosses showed that hybrid eucalypts supported the greatest species richness and abundances of insect and fungal taxa. In an updated review of 152 case studies of taxa associated with diverse hybridizing systems, there were 43 (28%) cases of hybrids being more susceptible than their parent species, 7 (5%) resistant, 35 (23%) additive, 35 … Show more

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Cited by 178 publications
(140 citation statements)
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“…Several reasons make studies on species' borders intriguing: (1) marginal populations are more sensitive to environmental changes, (2) marginal populations can indicate that a species' ecological requirements are in equilibrium with properties of the environment (Hengeveld, 1990), (3) species borders discriminate best between conditions favorable for the species and those that are not, (4) marginal habitats provide ideal sites to study species interactions (competition, hybridization, predation; e.g., Whitham et al, 1999), and finally (5) marginal conditions can indicate potential ranges for species invasion and species transplantation. Although many invasive species have been intensively studied (see next section), the role of dispersal and other causes for their high invasiveness associated with its boundary shifts and the practical implications of such boundary changes have not been adequately investigated.…”
Section: C-m Variation In Population Size and Densitymentioning
confidence: 99%
“…Several reasons make studies on species' borders intriguing: (1) marginal populations are more sensitive to environmental changes, (2) marginal populations can indicate that a species' ecological requirements are in equilibrium with properties of the environment (Hengeveld, 1990), (3) species borders discriminate best between conditions favorable for the species and those that are not, (4) marginal habitats provide ideal sites to study species interactions (competition, hybridization, predation; e.g., Whitham et al, 1999), and finally (5) marginal conditions can indicate potential ranges for species invasion and species transplantation. Although many invasive species have been intensively studied (see next section), the role of dispersal and other causes for their high invasiveness associated with its boundary shifts and the practical implications of such boundary changes have not been adequately investigated.…”
Section: C-m Variation In Population Size and Densitymentioning
confidence: 99%
“…in Australia ( Whitham et al 1994;Dungey et al 2000). A galling aphid (Pemphigus betae) is more abundant on genetically susceptible backcross cottonwood hybrids, and the presence of this aphid increases community richness, including arthropods, fungi, and birds ( Whitham et al 1999). Similarly, in the Rocky Mountains of the western United States and Canada, natural cottonwood hybrid zones are the strongest factor in-fluencing the geographical distribution of P. betae ( Floate et al 1997).…”
Section: Introductionmentioning
confidence: 99%
“…Similarly, in the Rocky Mountains of the western United States and Canada, natural cottonwood hybrid zones are the strongest factor in-fluencing the geographical distribution of P. betae ( Floate et al 1997). Overall, from within a tree to the geographic scale, plant hybridization affects the abundance of diverse organisms from microbes to vertebrates ( Whitham et al 1999).…”
Section: Introductionmentioning
confidence: 99%
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