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Reproductive success, fruit removal and local distribution patterns in the early-flowering shrub Daphne mezereum

Arnell, Matilda, 1987- (author)
Stockholms universitet,Institutionen för ekologi, miljö och botanik
Eriksson, Ove, 1956- (author)
Stockholms universitet,Institutionen för ekologi, miljö och botanik
Ehrlén, Johan, 1956- (author)
Stockholms universitet,Institutionen för ekologi, miljö och botanik
 (creator_code:org_t)
2023
2023
English.
In: Nordic Journal of Botany. - 0107-055X .- 1756-1051. ; :10
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • In insect-pollinated, bird-dispersed plants, both investment in reproduction and reproductive success involve interactions between plants and their pollinators and dispersers. The outcome of these plant–animal interactions may be affected by the number of flowers and fruits, as well as by the plants' local environment and by spatial associations among plants. In this study we mapped the spatial distribution of individuals in a population of the early flowering, fleshy-fruited shrub Daphne mezereum, in a forest in boreo-nemoral Sweden. For all mapped individuals we collected data on numbers of flowers and fruits and fruit removal, for three consecutive years. We analysed spatial associations among individuals, and the effects on reproductive performance and fruit removal of plant height, numbers of flowers and fruits, distance to forest edge, and neighbouring flower and fruit density. Our results show that the density of D. mezereum increases with increasing proximity to forest edge. The number of flowers produced, as well as fruit set and fruit removal, show the same positive relationship with increasing proximity to forest edges. We further show that individuals are aggregated up to distances of about 10 m. The flower production of neighbouring conspecific individuals within 10 m is negatively related to fruit set whereas the fruit production of neighbours is positively related to fruit removal. Our main conclusion is that the spatial distribution of D. mezereum affects reproductive success and fruit removal, which in turn has the potential to feed back to the spatial distribution pattern. Combining studies of reproduction with spatial analyses is important to advance our understanding of the dynamics of plant populations. 

Subject headings

NATURVETENSKAP  -- Biologi -- Botanik (hsv//swe)
NATURAL SCIENCES  -- Biological Sciences -- Botany (hsv//eng)
NATURVETENSKAP  -- Biologi -- Ekologi (hsv//swe)
NATURAL SCIENCES  -- Biological Sciences -- Ecology (hsv//eng)

Keyword

bird-dispersal
Daphne mezereum
density effects on reproduction
fruit removal
fruit set
hand pollination
insect-pollination
point-pattern analysis
spatial associations

Publication and Content Type

ref (subject category)
art (subject category)

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Arnell, Matilda, ...
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NATURAL SCIENCES
NATURAL SCIENCES
and Biological Scien ...
and Botany
NATURAL SCIENCES
NATURAL SCIENCES
and Biological Scien ...
and Ecology
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Nordic Journal o ...
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Stockholm University

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