Artificial night-time lighting and nutrient enrichment synergistically favour the growth of alien ornamental plant species over co-occurring native plant species
Data files
Nov 17, 2023 version files 101.72 KB
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Flower_number.xlsx
17.34 KB
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Flowered_plants.xlsx
16.89 KB
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Height.xlsx
17.75 KB
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README.md
12.62 KB
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Root-Shoot_ratio.xlsx
17.50 KB
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Total_biomass.xlsx
19.61 KB
Abstract
- Insights into ecological drivers of alien plant invasions can be gained through comparative studies of growth and fecundity of invasive alien plants versus those of co-occurring non-invasive alien plants and native plants across environmental conditions in common garden settings. Habitats that harbour alien plant species in many ecosystems globally are presently experiencing light pollution resulting from artificial light at night (ALAN) and increased rates of nutrient enrichment of the soil. However, the potential interactive effects of ALAN and nutrient enrichment on invasiveness of alien plant species remain unknown.
- Here, we performed a common-garden experiment to test the interactive effects of ALAN and soil nutrient enrichment on the growth of a random set of 10 alien (five invasive and five naturalized) and seven co-occurring native ornamental plant species that are commonly cultivated within urban and peri-urban areas of Nairobi city in Kenya. We predicted that a simultaneous increase in photoperiod via ALAN and nutrient enrichment will favor growth of invasive alien plant species over that of non-invasive alien and native plant species. We grew the 17 plant species under natural daylight (ALAN-) vs natural daylight followed by ALAN (ALAN+) and fully crossed with two levels of nutrient enrichment (low vs high) and competition (competition vs no-competition against a native plant Ocimum gratissimum) treatments.
- Under simultaneous high-nutrient and no-competition treatments, ALAN enhanced mean total biomass of invasive and naturalized alien species by 61.1% and 131.4%, respectively but decreased that of native plant species by 34%. In contrast, under simultaneous high-nutrient and competition treatments, ALAN enhanced mean total biomass of invasive alien plant species by 68.6% and that of naturalized alien species by 51.9% and native species by 35.4%. High-nutrient treatment enhanced flower formation more strongly in invasive and naturalized alien plants than in native plants. The invasive and naturalized alien species grew taller than native species across the light, nutrient, and competition treatments.
- Synthesis: The present findings suggest that light pollution and nutrient enrichment may jointly confer growth advantage to invasive alien plant species over that of co-occurring native plant species and enhance invasiveness of alien plant species.
GENERAL INFORMATION
- Title of Dataset: Data from: Artificial night-time lighting and nutrient enrichment synergistically favour the growth of alien ornamental plant species over co-occurring native plant species.
- Author Information
Corresponding Investigator
Name: Dr. Ayub M. O. Oduor
Institution: Technical University of Kenya
Email: Ayub.Oduor@tukenya.ac.ke
<br>
Co-investigator 1
Name: Mr. Calvince R. Kawawa Abonyo
Institution: National Environment Management Authority (NEMA), P.O Box 67839-00200 Nairobi, Kenya. - Date of data collection: December 2019 - May 2020
- Geographic location of data collection: Nairobi, Kenya.
- Funding sources that supported the collection of the data: International Foundation of Science (No. D-6495-1); National Geographic Society, Washington D.C (grant no. WW-155R-17); Alexander von Humboldt Foundation (grant no. 3.4-8151/GA-Nr. 19016); DAAD within the framework of Climate Research for Alumni and Postdocs in Africa with funds of the Federal Ministry of Education and Research of Germany (fellowship reference no. 91787649).
- Recommended citation for this dataset: Oduor, Ayub M.O; Abonyo, C. R. K (2023), Artificial night-time lighting and nutrient enrichment synergistically favour the growth of alien ornamental plant species over co-occurring native plant species, Dryad, Dataset, https://doi.org/10.5061/dryad.95x69p8r8
DATA & FILE OVERVIEW
- Description of dataset
These data were generated from a common-garden experiment to test the interactive effects of artificial light at night (ALAN) and soil nutrient
enrichment on the growth of a random set of 10 alien (five invasive and five naturalized) and seven co-occurring native
ornamental plant species that are commonly cultivated within urban and peri-urban areas of Nairobi city in Kenya.
We predicted that a simultaneous increase in photoperiod via ALAN and nutrient enrichment will favor growth of invasive
alien plant species over that of non-invasive alien and native plant species. We grew the 17 plant species under natural
daylight only (ALAN-) vs natural daylight followed by ALAN (ALAN+) and fully crossed with two levels of nutrient enrichment (low vs high)
and competition (competition vs no-competition against a native plant Ocimum gratissimum) treatments.
- File List:
File 1 Name: Total biomass.xlsx
File 1 Description: Mean total biomass (g) of 17 test plant species.
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File 2 Name: Root-Shoot ratio.xlsx
File 2 Description: Mean values of root/shoot ratio of 17 test plant species.
<br>
File 3 Name: Height.xlsx
File 3 Description: Mean values of plant height (cm) of 17 test plant species.
<br>
File 4 Name: Flowered plants.xlsx
File 4 Description: Mean values of proportion of individual plants that flowered for 17 test plant species.
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File 5 Name: Flower number.xlsx
File 5 Description: Mean number of flowers per plant for 17 test plant species.
METHODOLOGICAL INFORMATION
We grew the 17 plant species under natural daylight only (ALAN-) vs natural daylight followed by ALAN (ALAN+) and fully crossed with two
levels of nutrient enrichment (low vs high) and competition (competition vs no-competition against a native plant Ocimum gratissimum) treatments.
Data prepration for statistical analysis:
We computed mean values for each of the 17 plant species under the factorial combinations of light, nutrient, competition, and invasive status.
DATA-SPECIFIC INFORMATION FOR THE FIVE (5) DIFFERENT FILES:
(1) DATA-SPECIFIC INFORMATION FOR: Total biomass.xlsx
- Number of variables: 15
- Number of cases/rows: 137
- Variable List:
- Species: five invasive alien, five naturalized alien, and seven co-occurring native ornamental plant species.
- Family: taxonomic family identity of each of the 17 plant species.
- Alien status: whether the plant is alien or native to Kenya.
- Invasive status: whether the plant is an invasive alien, non-invasive naturalized alien, or native.
- Life cycle: plant longevity.
- Clonality: reproduction mode of the plants.
- Growth form: whether the plant is herbaceous or shrubby.
- Photosynthetic pathway: carbon assimilation pathway of the plant.
- Plot number: plots where the experimental plants were grown.*Light: light treatment in the plots (ALAN- vs ALAN+).
- Nutrient: nutrient treatment in the pots (low nutrient vs high nutrient).
- Competition: competition treatment in the pots (each of the 17 species was grown in the absence of competition vs under competition).
- Mean: mean total biomass of each plant under factorial combinations of light, nutrient, competition, and invasive status treatments.
- SD: standard deviation associated with each mean.
- n= sample size for each factorial combination of light, nutrient, competition, and invasive status treatments.
- Missing data:
None - Abbreviations used:
- ALAN- = Natural day time lighting only (without artificial light at night) treatment.
- ALAN+ = Natural day time lighting + Artificial light at night treatment.
- High = High nutrient treatment.
- Low = Low nutrient treatment.
- Comp- = No-competition treatment.
- Comp+ = Competition treatment.
#########################################################################
(2) DATA-SPECIFIC INFORMATION FOR: Root-Shoot ratio.xlsx
- Number of variables: 15
- Number of cases/rows: 137
- Variable List:
- Species: five invasive alien, five naturalized alien, and seven co-occurring native ornamental plant species.
- Family: taxonomic family identity of each of the 17 plant species.
- Alien status: whether the plant is alien or native to Kenya.
- Invasive status: whether the plant is an invasive alien, non-invasive naturalized alien, or native.
- Life cycle: plant longevity.
- Clonality: reproduction mode of the plants.
- Growth form: whether the plant is herbaceous or shrubby.
- Photosynthetic pathway: carbon assimilation pathway of the plant.
- Plot number: plots where the experimental plants were grown.*Light: light treatment in the plots (ALAN- vs ALAN+).
- Nutrient: nutrient treatment in the pots (low nutrient vs high nutrient).
- Competition: competition treatment in the pots (each of the 17 species was grown in the absence of competition vs under competition).
- Mean: mean root/shoot ratio for each plant under factorial combinations of light, nutrient, competition, and invasive status treatments.
- SD: standard deviation associated with each mean.
- n= sample size for each factorial combination of light, nutrient, competition, and invasive status treatments.
- Missing data:
None - Abbreviations used:
- ALAN- = Natural day time lighting only (without artificial light at night) treatment.
- ALAN+ = Natural day time lighting + Artificial light at night treatment.
- High = High nutrient treatment.
- Low = Low nutrient treatment.
- Comp- = No-competition treatment.
- Comp+ = Competition treatment.
- NA = Not available.
#########################################################################
(3) DATA-SPECIFIC INFORMATION FOR: Height.xlsx
- Number of variables: 15
- Number of cases/rows: 137
- Variable List:
- Species: five invasive alien, five naturalized alien, and seven co-occurring native ornamental plant species.
- Family: taxonomic family identity of each of the 17 plant species.
- Alien status: whether the plant is alien or native to Kenya.
- Invasive status: whether the plant is an invasive alien, non-invasive naturalized alien, or native.
- Life cycle: plant longevity.
- Clonality: reproduction mode of the plants.
- Growth form: whether the plant is herbaceous or shrubby.
- Photosynthetic pathway: carbon assimilation pathway of the plant.
- Plot number: plots where the experimental plants were grown.*Light: light treatment in the plots (ALAN- vs ALAN+).
- Nutrient: nutrient treatment in the pots (low nutrient vs high nutrient).
- Competition: competition treatment in the pots (each of the 17 species was grown in the absence of competition vs under competition).
- Mean: mean height (cm) of each plant under factorial combinations of light, nutrient, competition, and invasive status treatments.
- SD: standard deviation associated with each mean.
- n= sample size for each factorial combination of light, nutrient, competition, and invasive status treatments.
- Missing data:
None - Abbreviations used:
- ALAN- = Natural day time lighting only (without artificial light at night) treatment.
- ALAN+ = Natural day time lighting + Artificial light at night treatment.
- High = High nutrient treatment.
- Low = Low nutrient treatment.
- Comp- = No-competition treatment.
- Comp+ = Competition treatment.
- NA = Not available.
#########################################################################
(4) DATA-SPECIFIC INFORMATION FOR: Flowered plants.xlsx
- Number of variables: 15
- Number of cases/rows: 137
- Variable List:
- Species: five invasive alien, five naturalized alien, and seven co-occurring native ornamental plant species.
- Family: taxonomic family identity of each of the 17 plant species.
- Alien status: whether the plant is alien or native to Kenya.
- Invasive status: whether the plant is an invasive alien, non-invasive naturalized alien, or native.
- Life cycle: plant longevity.
- Clonality: reproduction mode of the plants.
- Growth form: whether the plant is herbaceous or shrubby.
- Photosynthetic pathway: carbon assimilation pathway of the plant.
- Plot number: plots where the experimental plants were grown.
- Light: light treatment in the plots (ALAN- vs ALAN+).
- Nutrient: nutrient treatment in the pots (low nutrient vs high nutrient).
- Competition: competition treatment in the pots (each of the 17 species was grown in the absence of competition vs under competition).
- Mean: mean proportion of individual plants that flowered under factorial combinations of light, nutrient, competition, and invasive status treatments.
- SD: standard deviation associated with each mean.
- n= sample size for each factorial combination of light, nutrient, competition, and invasive status treatments.
- Missing data:
None - Abbreviations used:
- ALAN- = Natural day time lighting only (without artificial light at night) treatment.
- ALAN+ = Natural day time lighting + Artificial light at night treatment.
- High = High nutrient treatment.
- Low = Low nutrient treatment.
- Comp- = No-competition treatment.
- Comp+ = Competition treatment.
- NA = Not available
#########################################################################
(5) DATA-SPECIFIC INFORMATION FOR: Flower number.xlsx
- Number of variables: 15
- Number of cases/rows: 137
- Variable List:
- Species: five invasive alien, five naturalized alien, and seven co-occurring native ornamental plant species.
- Family: taxonomic family identity of each of the 17 plant species.
- Alien status: whether the plant is alien or native to Kenya.
- Invasive status: whether the plant is an invasive alien, non-invasive naturalized alien, or native.
- Life cycle: plant longevity.
- Clonality: reproduction mode of the plants.
- Growth form: whether the plant is herbaceous or shrubby.
- Photosynthetic pathway: carbon assimilation pathway of the plant.
- Plot number: plots where the experimental plants were grown.
- Light: light treatment in the plots (ALAN- vs ALAN+).
- Nutrient: nutrient treatment in the pots (low nutrient vs high nutrient).
- Competition: competition treatment in the pots (each of the 17 species was grown in the absence of competition vs under competition).
- Mean: mean number of flowers per plant under factorial combinations of light, nutrient, competition, and invasive status treatments.
- SD: standard deviation associated with each mean.
- n= sample size for each factorial combination of light, nutrient, competition, and invasive status treatments.
- Missing data:
None - Abbreviations used:
- ALAN- = Natural day time lighting only (without artificial light at night) treatment.
- ALAN+ = Natural day time lighting + Artificial light at night treatment.
- High = High nutrient treatment.
- Low = Low nutrient treatment.
- Comp- = No-competition treatment.
- Comp+ = Competition treatment.
Here, we performed a common-garden experiment to test the interactive effects of ALAN and soil nutrient enrichment on the growth of a random set of 10 alien (five invasive and five naturalized) and seven co-occurring native ornamental plant species that are commonly cultivated within urban and peri-urban areas of Nairobi city in Kenya.