scholarly journals Spatial variability in a plant–pollinator community across a continuous habitat: high heterogeneity in the face of apparent uniformity

Ecography ◽  
2019 ◽  
Vol 42 (9) ◽  
pp. 1558-1568 ◽  
Author(s):  
Sara Reverté ◽  
Jordi Bosch ◽  
Xavier Arnan ◽  
Tomas Roslin ◽  
Constantí Stefanescu ◽  
...  
Keyword(s):  
Spatial Variability ◽  
Pollinator Community ◽  
The Face ◽  
Plant Pollinator

scholarly journals Biotic and abiotic drivers of plant–pollinator community assembly across wildfire gradients

2020 ◽  
Author(s):  
Joseph A. LaManna ◽  
Laura A. Burkle ◽  
R. Travis Belote ◽  
Jonathan A. Myers
Keyword(s):  
Community Assembly ◽  
Pollinator Community ◽  
Plant Pollinator

scholarly journals Modelling the effects of the repellent scent marks of pollinators on their foraging efficiency and the plant-pollinator community

PLoS ONE ◽  
2021 ◽  
Vol 16 (9) ◽  
pp. e0256929
Author(s):  
Elise Verrier ◽  
Emmanuelle Baudry ◽  
Carmen Bessa-Gomes
Keyword(s):  
Social Information ◽  
Floral Resources ◽  
Foraging Efficiency ◽  
Scent Mark ◽  
Scent Marks ◽  
Agent Based ◽  
Individual Fitness ◽  
Pollinator Community ◽  
Plant Pollinator ◽  
Source Of Information

Pollinator insects forage in complex and unpredictable resource landscapes, often using social information from congeneric individuals to acquire knowledge about their environment. It has long been recognized that this process allows them to exploit floral resources more efficiently and thus increase individual fitness. However, by creating correlations between the behaviors of pollinators within a population, this could also indirectly influence the entire plant-pollinator community. One type of social information used by pollinators is the scent mark left on the corolla of flowers by previous visitors, which can be used as a cue to avoid recently depleted resources. We developed a spatially explicit agent-based model to examine the effects, at both individual and community levels, of pollinators using these scent marks. The model simulates a population of pollinators foraging on flowers in a continuous 2D space in which we can vary the density of pollinators. We showed that the use of scent marks as a source of information significantly increased the foraging efficiency of pollinators except when competition between pollinators was very low. At the community level, this also resulted in a marked homogenization between floral resources within the landscape: in the absence of scent marks, the coefficient of variation of the remaining nectar quantity per flower strongly increased with greater pollinator competition, but it remained low at all levels of competition when scent marks were used by the pollinators. Finally, the use of scent marks markedly decreased the number of pollinator flower visits, especially at high levels of pollinator competition, which can potentially reduce the pollination service.

scholarly journals The effect of landscape on Cucurbita pepo-pollinator interaction networks varies depending on plants’ genetic diversity

2021 ◽  
Author(s):  
Patricia Landaverde-González ◽  
Eunice Enríquez ◽  
Juan Núñez-Farfán
Keyword(s):  
Genetic Diversity ◽  
Land Use ◽  
Network Structure ◽  
Cucurbita Pepo ◽  
Interaction Network ◽  
Network Evolution ◽  
Interaction Networks ◽  
Pollinator Community ◽  
Male Flowers ◽  
Plant Pollinator

AbstractIn recent years, evidence has been found that plant-pollinator interactions are altered by land-use and that genetic diversity also plays a role. However, how land-use and genetic diversity influence plant–pollinator interactions, particularly in the Neotropics, where many endemic plants exist is still an open question. Cucurbita pepo is a monoecious plant and traditional crop wide distributed, with high rates of molecular evolution, landraces associated with human cultural management and a history of coevolution with bees, which makes this species a promising model for studying the effect of landscape and genetic diversity on plant-pollinator interactions. Here, we assess (1) whether female and male flowers differences have an effect on the interaction network, (2) how C. pepo genetic diversity affects flower-bee visitation network structure, and (3) what is the effect that land-use, accounting for C. pepo genetic variability, has on pumpkin-bee interaction network structure. Our results indicate that female and male flowers presented the same pollinator community composition and interaction network structure suggesting that female/male differences do not have a significant effect on network evolution. Genetic diversity has a positive effect on modularity, nestedness and number of interactions. Further, the effect of semi-natural areas on nestedness could be buffered when genetic diversity is high. Our results suggest that considering genetic diversity is relevant for a better understanding of the effect of land-use on interaction networks. Additionally, this understanding has great value in conserving biodiversity and enhancing the stability of interaction networks in a world facing great challenges of habitat and diversity loss.

scholarly journals Facilitation between plants shapes pollination networks

2017 ◽  
Author(s):  
Gianalberto Losapio ◽  
Miguel A. Fortuna ◽  
Jordi Bascompte ◽  
Bernhard Schmid ◽  
Richard Michalet ◽  
...  
Keyword(s):  
Ecosystem Functioning ◽  
Scale Up ◽  
Experimental System ◽  
Additive Effects ◽  
Plant Interactions ◽  
Bottom Up ◽  
Antagonistic Effects ◽  
Pollinator Community ◽  
Local Plant ◽  
Plant Pollinator

SignificanceAlthough it is known that plant–plant and plant–pollinator interactions can strongly influence biodiversity and its effects on ecosystem functioning, the details of how competition and facili-tation among plants scale up to mutualistic interactions with pollinators and thus affect pollina-tion networks are poorly understood. We introduce a simple experimental system in which we control local plant interactions, measure pollinator responses and characterize plant–pollinator networks. We find that facilitation among plants produces synergistic and antagonistic effects on the pollinator community affecting the architecture and robustness of plant–pollinator net-works. Our results provide evidence for bottom-up non-additive effects of plant interactions on pollination networks and have implications for the way we study and manage ecosystems.

scholarly journals Vulnerability and resistance in the spatial heterogeneity of soil microbial communities under resource additions

2020 ◽  
Vol 117 (13) ◽  
pp. 7263-7270 ◽  
Author(s):  
Kelly Gravuer ◽  
Anu Eskelinen ◽  
Joy B. Winbourne ◽  
Susan P. Harrison
Keyword(s):  
Spatial Variability ◽  
Spatial Heterogeneity ◽  
Soil Microbial Communities ◽  
Archaeal Community ◽  
Ecosystem Functions ◽  
Water Addition ◽  
Microbial Composition ◽  
Soil Microbial ◽  
The Face ◽  
And Function

Spatial heterogeneity in composition and function enables ecosystems to supply diverse services. For soil microbes and the ecosystem functions they catalyze, whether such heterogeneity can be maintained in the face of altered resource inputs is uncertain. In a 50-ha northern California grassland with a mosaic of plant communities generated by different soil types, we tested how spatial variability in microbial composition and function changed in response to nutrient and water addition. Fungal composition lost some of its spatial variability in response to nutrient addition, driven by decreases in mutualistic fungi and increases in antagonistic fungi that were strongest on the least fertile soils, where mutualists were initially most frequent and antagonists initially least frequent. Bacterial and archaeal community composition showed little change in their spatial variability with resource addition. Microbial functions related to nitrogen cycling showed increased spatial variability under nutrient, and sometimes water, additions, driven in part by accelerated nitrification on the initially more-fertile soils. Under anthropogenic changes such as eutrophication and altered rainfall, these findings illustrate the potential for significant changes in ecosystem-level spatial heterogeneity of microbial functions and communities.

scholarly journals Pyrodiversity begets plant-pollinator community diversity

2016 ◽  
Vol 22 (5) ◽  
pp. 1794-1808 ◽  
Author(s):  
Lauren C. Ponisio ◽  
Kate Wilkin ◽  
Leithen K. M'Gonigle ◽  
Kelly Kulhanek ◽  
Lindsay Cook ◽  
...  
Keyword(s):  
Community Diversity ◽  
Pollinator Community ◽  
Plant Pollinator
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