Experimental simulation of pollinator decline causes community‐wide reductions in seedling diversity and abundance

Lundgren, Rebekka; Totland, Ørjan; Lázaro, Amparo

doi:10.1890/15-0787.1

Cited by 33 publications

(31 citation statements)

References 84 publications

(150 reference statements)

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“…This finding may be explained by the fact that some plants need specific pollinators and therefore cannot produce seed set in a site where their pollinator does not occur (Steffan-Dewenter and Tscharntke 1999). More importantly, there was stronger evidence for an effect directed from bee to plant species richness, in line with other studies demonstrating that plant diversity benefits from increasing bee diversity ) and pollinator availability (Lundgren et al 2016). This result supports the idea of a more complex structure where individuals of multiple plant and pollinator species interact and indirectly affect each other (Carvalheiro et al 2014).…”

Section: Discussionsupporting

confidence: 89%

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Wild bee and floral diversity co‐vary in response to the direct and indirect impacts of land use

et al. 2017

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Abstract. Loss of habitat area and diversity poses a threat to communities of wild pollinators and flowering plants in agricultural landscapes. Pollinators, such as wild bees, and insect-pollinated plants are two groups of organisms that closely interact. Nevertheless, it is still not clear how species richness and functional diversity, in terms of pollination-relevant traits, of these two groups influence each other and how they respond to land use change. In the present study, we used data from 24 agricultural landscapes in seven European countries to investigate the effect of landscape composition and habitat richness on species richness and functional diversity of wild bees and insect-pollinated plants. We characterized the relationships between the diversity of bees and flowering plants and identified indirect effects of landscape on bees and plants mediated by these relationships. We found that increasing cover of arable land negatively affected flowering plant species richness, while increasing habitat richness positively affected the species richness and functional diversity of bees. In contrast, the functional diversity of insect-pollinated plants (when corrected for species richness) was unaffected by landscape composition, and habitat richness showed little relation to bee functional diversity. We additionally found that bee species richness positively affected plant species richness and that bee functional diversity was positively affected by both species richness and functional diversity of plants. The relationships between flowering plant and bee diversity were modulated by indirect effects of landscape characteristics on the biotic communities. In conclusion, our findings demonstrate that landscape properties affect plant and bee communities in both direct and indirect ways. The interconnection between the diversities of wild bees and insect-pollinated plants increases the risk for parallel declines, extinctions, and functional depletion. Our study highlights the necessity of considering the interplay between interacting species groups when assessing the response of entire communities to land use changes.

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Section: Discussionsupporting

confidence: 89%

“…) and pollinator availability (Lundgren et al. ). This result supports the idea of a more complex structure where individuals of multiple plant and pollinator species interact and indirectly affect each other (Carvalheiro et al.…”

Section: Discussionmentioning

confidence: 99%

Wild bee and floral diversity co‐vary in response to the direct and indirect impacts of land use

et al. 2017

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“…Plant interactions with animals, such as pollination, have a major role in determining species composition in communities (Sargent and Ackerly 2008). Many plant species depend on pollinators for their reproduction (Ollerton et al 2011), and can only persist in a community in the presence of such mutualists (Lundgren et al 2016). In this scenario, only the plant species with reproductive traits fitting the local pollinator community will persist, implying that pollinators act as biotic filters (Shrestha et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Trait patterns across space and time suggest an interplay of facilitation and competition acting on Neotropical hummingbird‐pollinated plant communities

Bergamo

Wolowski

Maruyama

et al. 2018

Oikos

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Pollinators may influence plant community assembly through biotic filtering and/or plant–plant competition and facilitation. The relative importance of each process, however, vary according to the scale and how strongly plants share their pollinators, and possibly in relation to the pollinator groups considered. We here investigated the assembly of three Atlantic forest hummingbird‐pollinated plant communities across space (among all species in the communities) and time, i.e. yearly flowering phenology (between pairs of co‐flowering species), based on the pairwise distances of multiple floral traits (corolla length, anther and stigma height, colour and nectar). Because tropical hummingbird‐pollinated plants are often subdivided in two pollination niches (hermits versus non‐hermits), we also analyzed these groups separately. We found that trait structure across space was clustered for some floral traits, suggesting biotic filtering and facilitation. All floral traits had weak phylogenetic signal, indicating that closely related species were not more similar than distantly related species. Moreover, floral traits were randomly structured along the phenology when analyzing all plants together. On the other hand, we found similar corolla length but divergent anther height in co‐flowering pairs within the same pollination niche. Thus, plants may benefit from flowering together and avoid competition through fine adjustments in reproductive traits. The results also suggest that clear signals of competition and facilitation among plants are only apparent when species strongly share their pollinators and depending on the traits that are considered. Our study illustrates a complex interplay of biotic filtering, facilitation and competition as processes structuring guilds of plants sharing the same functional group of pollinators.

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“…Using a different approach Albrecht et al (2012) showed that increased pollinator functional group richness resulted in greater fruit and seed set in a model plant, Raphanus sativus. At a larger ecological scale, Lundgren et al (2016) reduced pollinator availability at the community-level over four years and assessed how this affected recruitment of seedlings in 10 perennial hay meadow herbs in Norway. The results were complex and to some extent dependent upon the plant being studied, but over all the loss of pollinators resulted in a decline in the diversity and abundance of seedlings.…”

mentioning

confidence: 99%

Pollinator Diversity: Distribution, Ecological Function, and Conservation

Ollerton

2017

Annu. Rev. Ecol. Evol. Syst.

550

429

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By facilitating plant reproduction, pollinators perform a crucial ecological function that supports the majority of the world's plant diversity, and associated organisms, and a significant fraction of global agriculture. Thus pollinators are simultaneously vital to supporting both natural ecosystems and human food security, which is a unique position for such a diverse group of organisms.The past couple of decades have seen unprecedented interest in pollinators and pollination ecology, stimulated in part by concerns over the decline of pollinator abundance and diversity in some parts of the world. This review synthesizes what is currently understood about the taxonomic diversity of organisms that are known to act as pollinators; their distribution in both deep time and present space; the importance of their diversity for ecological function (including agro-ecology); changes to diversity and abundance over more recent timescales, including introduction of non-native species, and a discussion of arguments for conserving their diversity.

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Experimental simulation of pollinator decline causes community‐wide reductions in seedling diversity and abundance

Cited by 33 publications

References 84 publications

Wild bee and floral diversity co‐vary in response to the direct and indirect impacts of land use

Wild bee and floral diversity co‐vary in response to the direct and indirect impacts of land use

Trait patterns across space and time suggest an interplay of facilitation and competition acting on Neotropical hummingbird‐pollinated plant communities

Pollinator Diversity: Distribution, Ecological Function, and Conservation

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