Vertical stratification of plant–pollinator interactions in a temperate grassland

Klečka, Jan; Hadrava, Jiří; Koloušková, Pavla

doi:10.7717/peerj.4998

Cited by 21 publications

(4 citation statements)

References 49 publications

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“…As discussed above, plants grown with high amount of water were taller and produced more flowers and these characteristics had a positive effect on the visitation of individual plants as reported in other plant species ( e.g. , Mitchell et al, 2004 ; Akter, Biella & Klecka, 2017 ; Klecka, Hadrava & Koloušková, 2018a ). However, other modifications of plant traits induced by water stress also apparently decreased the visitation of plants grown with low amount of water, because the effect of water availability on the number of flower visitors per plant persisted even after accounting for differences in the number of open flowers and plant height in our analysis.…”

Section: Discussionsupporting

confidence: 52%

“…Flower visitation rate of insect-pollinated plants depends on visual cues indicating high floral reward such as the number of open flowers ( Conner & Rush, 1996 ; Akter, Biella & Klecka, 2017 ) and the size of floral display ( Grindeland, Sletvold & Ims, 2005 ; Parachnowitsch & Kessler, 2010 ; Biella et al, 2019 ), and on the amount and quality of nectar and pollen ( Cresswell, 1999 ; Grindeland, Sletvold & Ims, 2005 ). Other morphological features can also influence plant detection by potential pollinators, such as plant height ( Junker et al, 2013 ; Klecka, Hadrava & Koloušková, 2018a ; Hernández-Villa et al, 2020 ), local plant clustering ( Elliott & Irwin, 2009 ; Akter, Biella & Klecka, 2017 ), and flower colour ( Reverté et al, 2016 ). Measurements of flower visitation with plants grown in the spring 2017 and plants grown in the summer 2018 revealed that in both cases plants grown with higher amount of water had a significantly higher number of flower visitors compared to plants grown under low amount of water irrespective of nitrogen supply.…”

Section: Discussionmentioning

confidence: 99%

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Water stress and nitrogen supply affect floral traits and pollination of the white mustard,Sinapis alba(Brassicaceae)

Akter

Klečka

2022

PeerJ

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Changes in environmental conditions are likely to have a complex effect on the growth of plants, their phenology, plant-pollinator interactions, and reproductive success. The current world is facing an ongoing climate change along with other human-induced environmental changes. Most research has focused on the impact of increasing temperature as a major driving force for climate change, but other factors may have important impacts on plant traits and pollination too and these effects may vary from season to season. In addition, it is likely that the effects of multiple environmental factors, such as increasing temperature, water availability, and nitrogen enrichment are not independent. Therefore, we tested the impact of two key factors—water, and nitrogen supply—on plant traits, pollination, and seed production in Sinapis alba (Brassicaceae) in three seasons defined as three temperature conditions with two levels of water and nitrogen supply in a factorial design. We collected data on multiple vegetative and floral traits and assessed the response of pollinators in the field. Additionally, we evaluated the effect of growing conditions on seed set in plants exposed to pollinators and in hand-pollinated plants. Our results show that water stress impaired vegetative growth, decreased flower production, and reduced visitation by pollinators and seed set, while high amount of nitrogen increased nectar production under low water availability in plants grown in the spring. Temperature modulated the effect of water and nitrogen availability on vegetative and floral traits and strongly affected flowering phenology and flower production. We demonstrated that changes in water and nitrogen availability alter plant vegetative and floral traits, which impacts flower visitation and consequently plant reproduction. We conclude that ongoing environmental changes such as increasing temperature, altered precipitation regimes and nitrogen enrichment may thus affect plant-pollinator interactions with negative consequences for the reproduction of wild plants and insect-pollinated crops.

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Section: Discussionsupporting

confidence: 52%

Section: Discussionmentioning

confidence: 99%

Water stress and nitrogen supply affect floral traits and pollination of the white mustard,Sinapis alba(Brassicaceae)

Akter

Klečka

2022

PeerJ

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“…For example, pollen of Centaurea stoebe and Dianthus deltoides was common in the samples from C. chalybea but almost absent in samples from the other two Ceratina species, where it was replaced by pollen of Sedum rupestre , Allium flavum , and other plants. Such pattern of resource partitioning could be caused by different preferences for floral traits ( Junker et al, 2013 ; Klecka et al, 2018a ), variation in preferred plant height ( Klecka, Hadrava & Koloušková, 2018b ), or by interspecific competition ( Schoener, 1974 ; Palmer, Stanton & Young, 2003 ), as demonstrated previously in bumblebees ( Inouye, 1978 ; Graham & Jones, 1996 ).…”

Section: Discussionmentioning

confidence: 77%

Individual-level specialisation and interspecific resource partitioning in bees revealed by pollen DNA metabarcoding

Klečka

Mikát

Koloušková

et al. 2022

PeerJ

Self Cite

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It is increasingly recognised that intraspecific variation in traits, such as morphology, behaviour, or diet is both ubiquitous and ecologically important. While many species of predators and herbivores are known to display high levels of between-individual diet variation, there is a lack of studies on pollinators. It is important to fill in this gap because individual-level specialisation of flower-visiting insects is expected to affect their efficiency as pollinators with consequences for plant reproduction. Accordingly, the aim of our study was to quantify the level of individual-level specialisation and foraging preferences, as well as interspecific resource partitioning, in three co-occurring species of bees of the genus Ceratina (Hymenoptera: Apidae: Xylocopinae), C. chalybea, C. nigrolabiata, and C. cucurbitina. We conducted a field experiment where we provided artificial nesting opportunities for the bees and combined a short-term mark-recapture study with the dissection of the bees’ nests to obtain repeated samples from individual foraging females and complete pollen provisions from their nests. We used DNA metabarcoding based on the ITS2 locus to identify the composition of the pollen samples. We found that the composition of pollen carried on the bodies of female bees and stored in the brood provisions in their nests significantly differed among the three co-occurring species. At the intraspecific level, individual females consistently differed in their level of specialisation and in the composition of pollen carried on their bodies and stored in their nests. We also demonstrate that higher generalisation at the species level stemmed from larger among-individual variation in diets, as observed in other types of consumers, such as predators. Our study thus reveals how specialisation and foraging preferences of bees change from the scale of individual foraging bouts to complete pollen provisions accumulated in their nests over many days. Such a multi-scale view of foraging behaviour is necessary to improve our understanding of the functioning of plant-flower visitor communities.

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“…Flower number, plant height and flower size are also likely to be correlated with the overall resource status of individual plants (Hodgins & Barrett, 2008;Weiner, 1988). Many studies have demonstrated that fruit and seed production could increase with increasing flower number, plant height or mean flower size of individual plants (Andersson, 1991;de Jong, Waser, Price, & Ring, 1992;Klecka, Hadrava, & Koloušková, 2018;Mitchell, 1994;Ohara & Higashi, 1994;Ruane, Rotzin, & Congleton, 2014).…”

Section: Introductionmentioning

confidence: 99%

Factors affecting fruit and seed production of Paeonia ostii “Feng Dan”, an economically important oil tree

Cao

Lin

Cheng

et al. 2021

Plant Species Biology

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Many factors may affect reproduction of animal‐pollinated species. In this study, the effects of pollen limitation, attractive traits (flower number, plant height and flower width) and flowering phenological traits (flowering onset, duration and synchrony) on female reproduction, as well as the patterns of variation in fruit and seed production within plants, were investigated in Paeonia ostii “Feng Dan” over two flowering seasons (2018 and 2019). Fruit set was very high (90%), and pollen supplementation did not increase fruit and seed production in either year, indicating no pollen limitation. Fruit set, ovule number per fruit and mean individual seed weight per fruit were not affected by any of the six attractive and phenological traits in either year, whereas seed number per fruit was related to the three attractive traits in one or both years. Seed number per plant was positively affected by the three attractive traits and best explained by flower number in both years, but the effect of each of the three phenological traits on seed number per plant differed between years. Within plants, the fruit set, ovule number, seed set and seed number per fruit declined from early‐ to late‐opening flowers, presumably because of resource preemption, but the mean individual seed weight did not vary across the flowering sequence. Our study shows that attractive traits of Paeonia ostii “Feng Dan” are more important than flowering phenological traits in the prediction of total seed production per plant.

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Vertical stratification of plant–pollinator interactions in a temperate grassland

Cited by 21 publications

References 49 publications

Water stress and nitrogen supply affect floral traits and pollination of the white mustard,Sinapis alba(Brassicaceae)

Water stress and nitrogen supply affect floral traits and pollination of the white mustard,Sinapis alba(Brassicaceae)

Individual-level specialisation and interspecific resource partitioning in bees revealed by pollen DNA metabarcoding

Factors affecting fruit and seed production of Paeonia ostii “Feng Dan”, an economically important oil tree

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