Limits to evolution at range margins: when and why does adaptation fail?

Bridle, Jon R.; Vines, Tim

doi:10.1016/j.tree.2006.11.002

Cited by 596 publications

(711 citation statements)

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“…In rapidly changing environments, the ability to evolve depends largely on the distribution of this variation, both within and across populations (Bridle & Vines, 2006; Hoffmann et al., 2015; Sgro, Lowe, & Hoffmann, 2011). Thus, major outstanding questions for rare species ask whether rare species have the necessary genetic variation to evolve and how that variation is distributed.…”

Section: Introductionmentioning

confidence: 99%

Genetic conservation and management of the California endemic, Torrey pine (Pinus torreyanaParry): Implications of genetic rescue in a genetically depauperate species

Hamilton

Royauté

Wright

et al. 2017

Ecology and Evolution

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Rare species present a challenge under changing environmental conditions as the genetic consequences of rarity may limit species ability to adapt to environmental change. To evaluate the evolutionary potential of a rare species, we assessed variation in traits important to plant fitness using multigenerational common garden experiments. Torrey pine, Pinus torreyana Parry, is one of the rarest pines in the world, restricted to one mainland and one island population. Morphological differentiation between island and mainland populations suggests adaptation to local environments may have contributed to trait variation. The distribution of phenotypic variances within the common garden suggests distinct population‐specific growth trajectories underlay genetic differences, with the island population exhibiting substantially reduced genetic variance for growth relative to the mainland population. Furthermore, F1 hybrids, representing a cross between mainland and island trees, exhibit increased height accumulation and fecundity relative to mainland and island parents. This may indicate genetic rescue via intraspecific hybridization could provide the necessary genetic variation to persist in environments modified as a result of climate change. Long‐term common garden experiments, such as these, provide invaluable resources to assess the distribution of genetic variance that may inform conservation strategies to preserve evolutionary potential of rare species, including genetic rescue.

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Section: Introductionmentioning

confidence: 99%

Genetic conservation and management of the California endemic, Torrey pine (Pinus torreyanaParry): Implications of genetic rescue in a genetically depauperate species

Hamilton

Royauté

Wright

et al. 2017

Ecology and Evolution

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“…Because species are usually distributed over large areas latitudinally, species range limits are most often studied on a broad geographic scale (e.g., Sagarin and Gaines 2002;Sorte and Hofmann 2004;Kuo and Sanford 2009). Such studies have been important for identifying potential biotic and abiotic limiting factors for a host of different species and their potential adaptations at range edges (e.g., Fawcett 1984;Zacherl et al 2003;Lima et al 2007; reviewed by Bridle and Vines 2007;Sexton et al 2009). However, large distances separating central populations from those at range edges can make the study of limiting factors and adaptation difficult since a variety of different conditions (e.g., climate, temperature, salinity, wave action, available substrate, species composition, species interactions, and food sources) vary considerably.…”

Section: Introductionmentioning

confidence: 99%

Differences in feeding adaptations in intertidal and subtidal suspension-feeding gastropods: studies on Crepidula fornicata and Crepipatella peruviana

et al. 2015

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“…Evolution in peripheral populations can differ markedly from evolution in more central populations within a species range [1][2][3]. Peripheral populations often exist at lower densities, produce fewer offspring per individual, are more fragmented and are more prone to local extinction [2,3].…”

Section: Introductionmentioning

confidence: 99%

Frontier mutualism: coevolutionary patterns at the northern range limit of the leaf-cutter ant–fungus symbiosis

et al. 2011

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Tropical leaf-cutter ants cultivate the fungus Attamyces bromatificus in a many-to-one, diffuse coevolutionary relationship where ant and fungal partners re-associate frequently over time. To evaluate whether ant -Attamyces coevolution is more specific (tighter) in peripheral populations, we characterized the host-specificities of Attamyces genotypes at their northern, subtropical range limits (southern USA, Mexico and Cuba). Population-genetic patterns of northern Attamyces reveal features that have so far not been observed in the diffusely coevolving, tropical ant -Attamyces associations. These unique features include (i) cases of one-to-one ant -Attamyces specialization that tighten coevolution at the northern frontier; (ii) distributions of genetically identical Attamyces clones over large areas (up to 81 000 km 2 , approx. the area of Ireland, Austria or Panama); (iii) admixture rates between Attamyces lineages that appear lower in northern than in tropical populations; and (iv) long-distance gene flow of Attamyces across a dispersal barrier for leaf-cutter ants (ocean between mainland North America and Cuba). The latter suggests that Attamyces fungi may occasionally disperse independently of the ants, contrary to the traditional assumption that Attamyces fungi depend entirely on leaf-cutter queens for dispersal. Peripheral populations in Argentina or at mid-elevation sites in the Andes may reveal additional regional variants in ant -Attamyces coevolution. Studies of such populations are most likely to inform models of coextinctions of obligate mutualistic partners that are doubly stressed by habitat marginality and by environmental change.

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Limits to evolution at range margins: when and why does adaptation fail?

Cited by 596 publications

References 69 publications

Genetic conservation and management of the California endemic, Torrey pine (Pinus torreyanaParry): Implications of genetic rescue in a genetically depauperate species

Genetic conservation and management of the California endemic, Torrey pine (Pinus torreyanaParry): Implications of genetic rescue in a genetically depauperate species

Differences in feeding adaptations in intertidal and subtidal suspension-feeding gastropods: studies on Crepidula fornicata and Crepipatella peruviana

Frontier mutualism: coevolutionary patterns at the northern range limit of the leaf-cutter ant–fungus symbiosis

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