The effects of soil warming on flowering phenology, reproductive strategy and attractiveness to pollinators in the herb Cerastium fontanum (Caryophyllaceae)
Phenotypic plasticity plays an important role in organisms’ adaptability to environmental change such as global warming caused by greenhouse-gas emissions. One plastic response to increased temperatures is for organisms to shift their phenology. It is of great concern that the phenologies of interac...
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Stockholms universitet, Institutionen för ekologi, miljö och botanik
2019
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ftstockholmuniv:oai:DiVA.org:su-184959 2023-05-15T16:49:42+02:00 The effects of soil warming on flowering phenology, reproductive strategy and attractiveness to pollinators in the herb Cerastium fontanum (Caryophyllaceae) Johner, Julia 2019 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-184959 eng eng Stockholms universitet, Institutionen för ekologi, miljö och botanik http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-184959 info:eu-repo/semantics/openAccess Climate change soil warming phenological mismatch phenotypic plasticity counter-gradient variation plant-pollinator interactions reproductive assurance autogamous self-pollination flower size common-garden experiment Natural Sciences Naturvetenskap Student thesis info:eu-repo/semantics/bachelorThesis text 2019 ftstockholmuniv 2023-02-23T21:40:35Z Phenotypic plasticity plays an important role in organisms’ adaptability to environmental change such as global warming caused by greenhouse-gas emissions. One plastic response to increased temperatures is for organisms to shift their phenology. It is of great concern that the phenologies of interacting species, such as plants and pollinators, may be shifting at different rates, causing temporal mismatches, which for plants can lead to unsuccessful reproduction. The “reproductive assurance hypothesis” states that plants capable of self-pollination should be under high selection to employ this as their main reproductive strategy in the event of pollinator scarcity to ensure reproduction, and consequently invest less in attracting pollinators. This study examines how soil warming in the Hengill geothermal area in Iceland affects the flowering phenology, reproductive strategy and investment in attractiveness to pollinators in the self-compatible herb Cerastium fontanum (Caryophyllaceae), when grown in a common garden in Stockholm, Sweden. Previous research showed that C. fontanum from warmed soils flowered earlier in situ than plants from colder soils, and later when grown in a common environment. In this study, C. fontanum plants collected along a temperature gradient followed the same counter-gradient pattern, where plants from warmer soils flowered later than plants from colder soils. Soil temperature at site of origin positively affected flower number but had no effect on flower size, seed production from autogamous self-pollination or visitation rate. Based on my findings it does not appear that C. fontanum, despite having an earlier flowering phenology in situ, is under any selection to alter its reproductive strategy or investment in attractiveness to pollinators when grown in a common temperature, and therefore it seems unlikely that plants are experiencing a temporal mismatch with insect pollinators. However, it would be worthwhile to conduct a similar experiment in Iceland to better understand how an ... Bachelor Thesis Iceland Stockholm University: Publications (DiVA) Hengill ENVELOPE(-21.306,-21.306,64.078,64.078) |
institution |
Open Polar |
collection |
Stockholm University: Publications (DiVA) |
op_collection_id |
ftstockholmuniv |
language |
English |
topic |
Climate change soil warming phenological mismatch phenotypic plasticity counter-gradient variation plant-pollinator interactions reproductive assurance autogamous self-pollination flower size common-garden experiment Natural Sciences Naturvetenskap |
spellingShingle |
Climate change soil warming phenological mismatch phenotypic plasticity counter-gradient variation plant-pollinator interactions reproductive assurance autogamous self-pollination flower size common-garden experiment Natural Sciences Naturvetenskap Johner, Julia The effects of soil warming on flowering phenology, reproductive strategy and attractiveness to pollinators in the herb Cerastium fontanum (Caryophyllaceae) |
topic_facet |
Climate change soil warming phenological mismatch phenotypic plasticity counter-gradient variation plant-pollinator interactions reproductive assurance autogamous self-pollination flower size common-garden experiment Natural Sciences Naturvetenskap |
description |
Phenotypic plasticity plays an important role in organisms’ adaptability to environmental change such as global warming caused by greenhouse-gas emissions. One plastic response to increased temperatures is for organisms to shift their phenology. It is of great concern that the phenologies of interacting species, such as plants and pollinators, may be shifting at different rates, causing temporal mismatches, which for plants can lead to unsuccessful reproduction. The “reproductive assurance hypothesis” states that plants capable of self-pollination should be under high selection to employ this as their main reproductive strategy in the event of pollinator scarcity to ensure reproduction, and consequently invest less in attracting pollinators. This study examines how soil warming in the Hengill geothermal area in Iceland affects the flowering phenology, reproductive strategy and investment in attractiveness to pollinators in the self-compatible herb Cerastium fontanum (Caryophyllaceae), when grown in a common garden in Stockholm, Sweden. Previous research showed that C. fontanum from warmed soils flowered earlier in situ than plants from colder soils, and later when grown in a common environment. In this study, C. fontanum plants collected along a temperature gradient followed the same counter-gradient pattern, where plants from warmer soils flowered later than plants from colder soils. Soil temperature at site of origin positively affected flower number but had no effect on flower size, seed production from autogamous self-pollination or visitation rate. Based on my findings it does not appear that C. fontanum, despite having an earlier flowering phenology in situ, is under any selection to alter its reproductive strategy or investment in attractiveness to pollinators when grown in a common temperature, and therefore it seems unlikely that plants are experiencing a temporal mismatch with insect pollinators. However, it would be worthwhile to conduct a similar experiment in Iceland to better understand how an ... |
format |
Bachelor Thesis |
author |
Johner, Julia |
author_facet |
Johner, Julia |
author_sort |
Johner, Julia |
title |
The effects of soil warming on flowering phenology, reproductive strategy and attractiveness to pollinators in the herb Cerastium fontanum (Caryophyllaceae) |
title_short |
The effects of soil warming on flowering phenology, reproductive strategy and attractiveness to pollinators in the herb Cerastium fontanum (Caryophyllaceae) |
title_full |
The effects of soil warming on flowering phenology, reproductive strategy and attractiveness to pollinators in the herb Cerastium fontanum (Caryophyllaceae) |
title_fullStr |
The effects of soil warming on flowering phenology, reproductive strategy and attractiveness to pollinators in the herb Cerastium fontanum (Caryophyllaceae) |
title_full_unstemmed |
The effects of soil warming on flowering phenology, reproductive strategy and attractiveness to pollinators in the herb Cerastium fontanum (Caryophyllaceae) |
title_sort |
effects of soil warming on flowering phenology, reproductive strategy and attractiveness to pollinators in the herb cerastium fontanum (caryophyllaceae) |
publisher |
Stockholms universitet, Institutionen för ekologi, miljö och botanik |
publishDate |
2019 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-184959 |
long_lat |
ENVELOPE(-21.306,-21.306,64.078,64.078) |
geographic |
Hengill |
geographic_facet |
Hengill |
genre |
Iceland |
genre_facet |
Iceland |
op_relation |
http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-184959 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1766039886173831168 |