Changes in pollinator fauna cause spatial variation in pollen limitation
نویسندگان
چکیده
منابع مشابه
Changes in pollinator fauna affect altitudinal variation of floral size in a bumblebee-pollinated herb
Geographic trait variations are often caused by locally different selection regimes. As a steep environmental cline along altitude strongly influences adaptive traits, mountain ecosystems are ideal for exploring adaptive differentiation over short distances. We investigated altitudinal floral size variation of Campanula punctata var. hondoensis in 12 populations in three mountain regions of cen...
متن کاملVariation of pollinator assemblages and pollen limitation in a locally specialized system: the oil-producing Nierembergia linariifolia (Solanaceae).
BACKGROUND AND AIMS Few studies have examined the dynamics of specialist plant-pollinator interactions at a geographical scale. This knowledge is crucial for a more general evolutionary and ecological understanding of specialized plant-pollinator systems. In the present study, variations in pollinator activity, assemblage composition and pollen limitation were explored in the oil-producing spec...
متن کاملDistinct effects of pollinator dependence and self-incompatibility on pollen limitation in South African biodiversity hotspots.
Global synthesis indicates that limitation of plant fecundity by pollen receipt (pollen limitation) is positively related to regional plant diversity and is higher for self-incompatible than self-compatible species. While self-incompatible species are always dependent on pollinating agents, self-compatible species may be pollinator-dependent or autofertile. This should cause variation in pollen...
متن کاملDoes an 'oversupply' of ovules cause pollen limitation?
Lifetime seed production can be constrained by shortfalls of pollen receipt ('pollen limitation'). The ovule oversupply hypothesis states that, in response to unpredictable pollen availability, plants evolve to produce more ovules than they expect to be fertilized, and that this results in pollen limitation of seed production. Here, we present a cartoon model and a model of optimal plant reprod...
متن کاملBreeding system, pollinator choice and variation in pollen quality in British herbaceous plants
1. Although it is well established that different plant species vary considerably in the quality of pollinator rewards they offer, it is unclear how plant reproductive systems, in particular an obligate dependence on insects for pollination, might influence the evolution of pollinator rewards. Moreover, unlike the interaction between nectar reward and pollinator visitation, we have a limited un...
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ژورنال
عنوان ژورنال: Journal of Ecology
سال: 2010
ISSN: 0022-0477
DOI: 10.1111/j.1365-2745.2010.01691.x