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2. Reduce pests, enhance production: benefits of intercropping at high densities for okra farmers in Cameroon

Author

Singh, Akanksha, Weisser, Wolfgang W, Hanna, Rachid, Houmgny, Raissa, and Zytynska, Sharon E

Subjects
Agricultural, Veterinary and Food Sciences, Agricultural Biotechnology, Agriculture, Land and Farm Management, Crop and Pasture Production, Horticultural Production, Zero Hunger, Abelmoschus, Animals, Cameroon, Crop Production, Crops, Agricultural, Food Chain, Insect Control, Insecta, Phaseolus, Spiders, Zea mays, intercropping, crop identity, high plant density, pests, predators, yield, Environmental Science and Management, Entomology, Crop and pasture production, Zoology, Environmental management
Abstract

BackgroundIntercropping can help reduce insect pest populations. However, the results of intercropping can be pest- and crop-species specific, with varying effects on crop yield, and pest suppression success. In Cameroon, okra vegetable is often grown in intercropped fields and sown with large distances between planting rows (∼ 2 m). Dominant okra pests include cotton aphids, leaf beetles and whiteflies. In a field experiment, we intercropped okra with maize and bean in different combinations (okra monoculture, okra-bean, okra-maize and okra-bean-maize) and altered plant densities (high and low) to test for the effects of diversity, crop identity and planting distances on okra pests, their predators and yield.ResultsWe found crop identity and plant density, but not crop diversity to influence okra pests, their predators and okra yield. Only leaf beetles decreased okra yield and their abundance reduced at high plant density. Overall, okra grown with bean at high density was the most economically profitable combination.ConclusionsWe suggest that when okra is grown at higher densities, legumes (e.g. beans) should be included as an additional crop. Intercropping with a leguminous crop can enhance nitrogen in the soil, benefiting other crops, while also being harvested and sold at market for additional profit. Manipulating planting distances and selecting plants based on their beneficial traits may thus help to eliminate yield gaps in sustainable agriculture. © 2017 Society of Chemical Industry.

Published
2017

4. Geographic distribution of terpenoid chemotypes in Tanacetum vulgare mediates tansy aphid occurrence but not abundance

Author

Rahimova, Humay, primary, Neuhaus‐Harr, Annika, additional, Clancy, Mary V., additional, Guo, Yuan, additional, Junker, Robert R., additional, Ojeda‐Prieto, Lina, additional, Petrén, Hampus, additional, Senft, Matthias, additional, Zytynska, Sharon E., additional, Weisser, Wolfgang W., additional, Heinen, Robin, additional, and Schnitzler, Jörg‐Peter, additional

Published
2024
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6. Ant attendance of the cotton aphid is beneficial for okra plants: deciphering multitrophic interactions

Author

Singh, Akanksha, Zytynska, Sharon E, Hanna, Rachid, and Weisser, Wolfgang W

Subjects
Agricultural, Veterinary and Food Sciences, Environmental Biotechnology, Crop and Pasture Production, Environmental Sciences, Ant-aphid, biocontrol, interactions, multitrophic, plant varieties, Biological Sciences, Agricultural and Veterinary Sciences, Entomology, Agricultural, veterinary and food sciences, Biological sciences, Environmental sciences
Abstract

Abstract: Aphids are pest species of many crops and biocontrol methods are often ineffective. Ant–aphid associations can be mutualistic or antagonistic, with ants increasing or reducing aphid numbers. Within‐species plant variation or other herbivores may further influence these ant–aphid interactions. Okra is an economically important crop inCameroon. Several okra varieties are grown here and attacked by the facultatively ant‐tended cotton aphidAphis gossypii. We conducted field and screenhouse experiments where plant variety, ant presence and predator access were manipulated to investigate the multitrophic interactions on okra and their effects on okra yield. In the field, ants did not protect aphids from their natural enemies and syrphid larvae reduced aphids by 42%. Additionally, aphid recruitment of ants reduced chewing herbivore damage by 11% and indirectly increased okra fruit set. We also found aphid numbers, aphid predation by syrphids and chewing herbivory to vary across okra varieties. Finally, in the screenhouse, we recorded a 24% reduction in aphid numbers on plants with ant presence. The present study highlights the importance of direct and indirect biotic interactions for pest biocontrol. Tropical agricultural systems are complex and understanding such interactions can help in designing pest control measures in sustainable agriculture.

Published
2016

11. Microbe‐induced plant resistance alters aphid inter‐genotypic competition leading to rapid evolution with consequences for plant growth and aphid abundance.

Author

Xi, Xinqiang, Dean, Andrew, and Zytynska, Sharon E.

Subjects
APHIDS, PLANT growth, PLANT evolution, RUSSIAN wheat aphid, LONGEVITY, CULTIVARS, BARLEY
Abstract

Plants and insect herbivores are two of the most diverse multicellular groups in the world, and both are strongly influenced by interactions with the belowground soil microbiome. Effects of reciprocal rapid evolution on ecological interactions between herbivores and plants have been repeatedly demonstrated, but it is unknown if (and how) the soil microbiome could mediate these eco‐evolutionary processes on a shared host plant. We tested the role of a plant‐beneficial soil bacterium Acidovorax radicis in altering eco‐evolutionary interactions between different aphid genotypes (Sitobion avenae, genotypes Sickte and Fescue) feeding on barley Hordeum vulgare. We measured fecundity, longevity and population growth of two aphid genotypes reared separately or together (population mixture) on three different barley varieties that were inoculated with or without A. radicis. Results showed that across all plant varieties A. radicis increased plant growth and suppressed aphid populations via reduced longevity and fecundity. The strength of effect was dependent on aphid genotype and barley variety, while the direction of effect was altered by aphid population mixture. Using Lotka–Volterra modelling, we demonstrated that while A. radicis inoculation decreased growth rates for both aphid genotypes it increased the competitiveness of one genotype against the other. In general, in the presence of A. radicis, the Fescue aphid genotype became more inhibitory of Sickte aphids, while Sickte aphids facilitated the growth of Fescue aphids. Our work demonstrates that plant rhizosphere microbiomes exert community‐level influences by mediating eco‐evolutionary interactions between herbivores and host plants. By altering competitive interaction outcomes among aphids and thus impacting processes such as rapid evolution, soil microbes contribute to the short‐ and long‐term structure and functioning of terrestrial habitats. [ABSTRACT FROM AUTHOR]

Published
2024
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13. The genetics of species interactions in model and natural ecosystems

Author

Zytynska, Sharon and Preziosi, Richard

Subjects
576.58, Community genetics, Species Interactions
Abstract

Within an ecological community, interactions between species in a community occur directly, through physical contact, and indirectly, via other species or through abiotic environmental modification. Genetic variation within a species has the ability to alter the outcome of interactions between species. In other words, the specific genotypes of the interacting individuals are important for the outcome of the interaction. In this thesis, I begin by showing that indirect interactions between a soil rhizobacteria (Pseudomonas aeruginosa) and a parasitoid wasp (Aphidius rhopalosiphum) are mediated by genotypic interactions between the two linking species, aphids (Sitobion avenae) and barley (Hordeum vulgare). This means that the magnitude and direction of the indirect effect of rhizobacteria (presence/absence) on the wing size of the parasitoid wasp was different, depending on the combination of interacting aphid and barley genotypes. If such interactions were to have an evolutionary effect, there would need to be non-random association between the aphid and barley genotypes. In the next chapter, I demonstrated that different aphid genotypes actively choose (no effect on reproductive rate) to colonize particular barley genotypes. I then showed that host preference of an aphid genotype could be altered by the presence, and sometimes genotypic identity, of another competing aphid genotype. I confirmed that these interactions were indirect, via the plant, by showing that aphid growth rate can be reduced when a plant is pre-conditioned with a different aphid genotype. Further investigation, using microarrays, showed that the different aphid genotypes induced differential gene expression in a single barley genotype. Many of these sequences belonged to known plant defense pathways and suggest a possible mechanism for the observed genotypic interactions between aphid and barley. In order to further understand the influence of within-species genetic variation on species interactions there is a need to consider these interactions in a natural system. I therefore investigated the influence of genetic variation within a single tree species on the associated plant and invertebrate communities in a complex, natural tropical ecosystem. I found that more closely related trees were host to more similar communities of epiphytic plants, leaf litter invertebrates around the base of the tree and trunk-dwelling invertebrates. This shows that even in a highly diverse, naturally occurring ecosystem the effect of genetic variation within a species can be an important factor for the structure of associated communities of both plants and animals.Research on the influence of within-species genetic variation on species interactions at a community level has wide applications for understanding how communities and ecosystems function, which can benefit agriculture, disease management and conservation practices.

Published
2010

18. Geographic distribution of terpenoid chemotypes inTanacetum vulgaremediates tansy aphid occurrence and abundance

Author

Rahimova, Humay, primary, Neuhaus-Harr, Annika, additional, Clancy, Mary V., additional, Guo, Yuan, additional, Junker, Robert R., additional, Ojeda-Prieto, Lina, additional, Petrén, Hampus, additional, Senft, Matthias, additional, Zytynska, Sharon E., additional, Weisser, Wolfgang W., additional, Heinen, Robin, additional, and Schnitzler, Jörg-Peter, additional

Published
2023
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29. Global urban environmental change drives adaptation in white clover

Author

Santangelo, James S., Ness, Rob W., Cohan, Beata, Fitzpatrick, Connor R., Innes, Simon G., Koch, Sophie, Miles, Lindsay S., Munim, Samreen, Peres-Neto, Pedro R., Prashad, Cindy, Tong, Alex T., Aguirre, Windsor E., Akinwole, Philips O., Alberti, Marina, Alvarez, Jackie, Anderson, Jill T., Anderson, Joseph J., Ando, Yoshino, Andrew, Nigel R., Angeoletto, Fabio, Anstett, Daniel N., Anstett, Julia, Aoki-Goncalves, Felipe, Arietta, A. Z. Andis, Arroyo, Mary T. K., Austen, Emily J., Baena-Diaz, Fernanda, Barker, Cory A., Baylis, Howard A., Beliz, Julia M., Benitez-Mora, Alfonso, Bickford, David, Biedebach, Gabriela, Blackburn, Gwylim S., Boehm, Mannfred M. A., Bonser, Stephen P., Bonte, Dries, Bragger, Jesse R., Branquinho, Cristina, Brans, Kristien, I, Bresciano, Jorge C., Brom, Peta D., Bucharova, Anna, Burt, Briana, Cahill, James F., Campbell, Katelyn D., Carlen, Elizabeth J., Carmona, Diego, Castellanos, Maria Clara, Centenaro, Giada, Chalen, Izan, Chaves, Jaime A., Chavez-Pesqueira, Mariana, Chen, Xiao-Yong, Chilton, Angela M., Chomiak, Kristina M., Cisneros-Heredia, Diego F., Cisse, Ibrahim K., Classen, Aimee T., Comerford, Mattheau S., Fradinger, Camila Cordoba, Corney, Hannah, Crawford, Andrew J., Crawford, Kerri M., Dahirel, Maxime, David, Santiago, De Haan, Robert, Deacon, Nicholas J., Dean, Clare, Del-Val, Ek, Deligiannis, Eleftherios K., Denney, Derek, Dettlaff, Margarete A., DiLeo, Michelle F., Ding, Yuan-Yuan, Dominguez-Lopez, Moises E., Dominoni, Davide M., Draud, Savannah L., Dyson, Karen, Ellers, Jacintha, Espinosa, Carlos, I, Essi, Liliana, Falahati-Anbaran, Mohsen, Falcao, Jessica C. F., Fargo, Hayden T., Fellowes, Mark D. E., Fitzpatrick, Raina M., Flaherty, Leah E., Flood, Padraic J., Flores, Maria F., Fornoni, Juan, Foster, Amy G., Frost, Christopher J., Fuentes, Tracy L., Fulkerson, Justin R., Gagnon, Edeline, Garbsch, Frauke, Garroway, Colin J., Gerstein, Aleeza C., Giasson, Mischa M., Girdler, E. Binney, Gkelis, Spyros, Godsoe, William, Golemiec, Anneke M., Golemiec, Mireille, Gonzalez-Lagos, Cesar, Gorton, Amanda J., Gotanda, Kiyoko M., Granath, Gustaf, Greiner, Stephan, Griffiths, Joanna S., Grilo, Filipa, Gundel, Pedro E., Hamilton, Benjamin, Hardin, Joyce M., He, Tianhua, Heard, Stephen B., Henriques, Andre F., Hernandez-Poveda, Melissa, Hetherington-Rauth, Molly C., Hill, Sarah J., Hochuli, Dieter F., Hodgins, Kathryn A., Hood, Glen R., Hopkins, Gareth R., Hovanes, Katherine A., Howard, Ava R., Hubbard, Sierra C., Ibarra-Cerdena, Carlos N., Iniguez-Armijos, Carlos, Jara-Arancio, Paola, Jarrett, Benjamin J. M., Jeannot, Manon, Jimenez-Lobato, Vania, Johnson, Mae, Johnson, Oscar, Johnson, Philip P., Johnson, Reagan, Josephson, Matthew P., Jung, Meen Chel, Just, Michael G., Kahilainen, Aapo, Kailing, Otto S., Karinho-Betancourt, Eunice, Karousou, Regina, Kirn, Lauren A., Kirschbaum, Anna, Laine, Anna-Liisa, LaMontagne, Jalene M., Lampei, Christian, Lara, Carlos, Larson, Erica L., Lazaro-Lobo, Adrian, Le, Jennifer H., Leandro, Deleon S., Lee, Christopher, Lei, Yunting, Leon, Carolina A., Tamara, Manuel E. Lequerica, Levesque, Danica C., Liao, Wan-Jin, Ljubotina, Megan, Locke, Hannah, Lockett, Martin T., Longo, Tiffany C., Lundholm, Jeremy T., MacGillavry, Thomas, Mackin, Christopher R., Mahmoud, Alex R., Manju, Isaac A., Marien, Janine, Martinez, D. Nayeli, Martinez-Bartolome, Marina, Meineke, Emily K., Mendoza-Arroyo, Wendy, Merritt, Thomas J. S., Merritt, Lila Elizabeth L., Migiani, Giuditta, Minor, Emily S., Mitchell, Nora, Bazargani, Mitra Mohammadi, Moles, Angela T., Monk, Julia D., Moore, Christopher M., Morales-Morales, Paula A., Moyers, Brook T., Munoz-Rojas, Miriam, Munshi-South, Jason, Murphy, Shannon M., Murua, Maureen M., Neila, Melisa, Nikolaidis, Ourania, Njunji, Iva, Nosko, Peter, Nunez-Farfan, Juan, Ohgushi, Takayuki, Olsen, Kenneth M., Opedal, Oystein H., Ornelas, Cristina, Parachnowitsch, Amy L., Paratore, Aaron S., Parody-Merino, Angela M., Paule, Juraj, Paulo, Octavio S., Pena, Joao Carlos, Pfeiffer, Vera W., Pinho, Pedro, Piot, Anthony, Porth, Ilga M., Poulos, Nicholas, Puentes, Adriana, Qu, Jiao, Quintero-Vallejo, Estela, Raciti, Steve M., Raeymaekers, Joost A. M., Raveala, Krista M., Rennison, Diana J., Ribeiro, Milton C., Richardson, Jonathan L., Rivas-Torres, Gonzalo, Rivera, Benjamin J., Roddy, Adam B., Rodriguez-Munoz, Erika, Roman, Jose Raul, Rossi, Laura S., Rowntree, Jennifer K., Ryan, Travis J., Salinas, Santiago, Sanders, Nathan J., Santiago-Rosario, Luis Y., Savage, Amy M., Scheepens, J. F., Schilthuizen, Menno, Schneider, Adam C., Scholier, Tiffany, Scott, Jared L., Shaheed, Summer A., Shefferson, Richard P., Shepard, Caralee A., Shykoff, Jacqui A., Silveira, Georgianna, Smith, Alexis D., Solis-Gabriel, Lizet, Soro, Antonella, Spellman, Katie, V, Whitney, Kaitlin Stack, Starke-Ottich, Indra, Stephan, Jorg G., Stephens, Jessica D., Szulc, Justyna, Szulkin, Marta, Tack, Ayco J. M., Tamburrino, Italo, Tate, Tayler D., Tergemina, Emmanuel, Theodorou, Panagiotis, Thompson, Ken A., Threlfall, Caragh G., Tinghitella, Robin M., Toledo-Chelala, Lilibeth, Tong, Xin, Uroy, Lea, Utsumi, Shunsuke, Vandegehuchte, Martijn L., VanWallendael, Acer, Vidal, Paula M., Wadgymar, Susana M., Wang, Ai-Ying, Wang, Nian, Warbrick, Montana L., Whitney, Kenneth D., Wiesmeier, Miriam, Wiles, J. Tristian, Wu, Jianqiang, Xirocostas, Zoe A., Yan, Zhaogui, Yao, Jiahe, Yoder, Jeremy B., Yoshida, Owen, Zhang, Jingxiong, Zhao, Zhigang, Ziter, Carly D., Zuellig, Matthew P., Zufall, Rebecca A., Zurita, Juan E., Zytynska, Sharon E., Johnson, Marc T. J., Santangelo, James S., Ness, Rob W., Cohan, Beata, Fitzpatrick, Connor R., Innes, Simon G., Koch, Sophie, Miles, Lindsay S., Munim, Samreen, Peres-Neto, Pedro R., Prashad, Cindy, Tong, Alex T., Aguirre, Windsor E., Akinwole, Philips O., Alberti, Marina, Alvarez, Jackie, Anderson, Jill T., Anderson, Joseph J., Ando, Yoshino, Andrew, Nigel R., Angeoletto, Fabio, Anstett, Daniel N., Anstett, Julia, Aoki-Goncalves, Felipe, Arietta, A. Z. Andis, Arroyo, Mary T. K., Austen, Emily J., Baena-Diaz, Fernanda, Barker, Cory A., Baylis, Howard A., Beliz, Julia M., Benitez-Mora, Alfonso, Bickford, David, Biedebach, Gabriela, Blackburn, Gwylim S., Boehm, Mannfred M. A., Bonser, Stephen P., Bonte, Dries, Bragger, Jesse R., Branquinho, Cristina, Brans, Kristien, I, Bresciano, Jorge C., Brom, Peta D., Bucharova, Anna, Burt, Briana, Cahill, James F., Campbell, Katelyn D., Carlen, Elizabeth J., Carmona, Diego, Castellanos, Maria Clara, Centenaro, Giada, Chalen, Izan, Chaves, Jaime A., Chavez-Pesqueira, Mariana, Chen, Xiao-Yong, Chilton, Angela M., Chomiak, Kristina M., Cisneros-Heredia, Diego F., Cisse, Ibrahim K., Classen, Aimee T., Comerford, Mattheau S., Fradinger, Camila Cordoba, Corney, Hannah, Crawford, Andrew J., Crawford, Kerri M., Dahirel, Maxime, David, Santiago, De Haan, Robert, Deacon, Nicholas J., Dean, Clare, Del-Val, Ek, Deligiannis, Eleftherios K., Denney, Derek, Dettlaff, Margarete A., DiLeo, Michelle F., Ding, Yuan-Yuan, Dominguez-Lopez, Moises E., Dominoni, Davide M., Draud, Savannah L., Dyson, Karen, Ellers, Jacintha, Espinosa, Carlos, I, Essi, Liliana, Falahati-Anbaran, Mohsen, Falcao, Jessica C. F., Fargo, Hayden T., Fellowes, Mark D. E., Fitzpatrick, Raina M., Flaherty, Leah E., Flood, Padraic J., Flores, Maria F., Fornoni, Juan, Foster, Amy G., Frost, Christopher J., Fuentes, Tracy L., Fulkerson, Justin R., Gagnon, Edeline, Garbsch, Frauke, Garroway, Colin J., Gerstein, Aleeza C., Giasson, Mischa M., Girdler, E. Binney, Gkelis, Spyros, Godsoe, William, Golemiec, Anneke M., Golemiec, Mireille, Gonzalez-Lagos, Cesar, Gorton, Amanda J., Gotanda, Kiyoko M., Granath, Gustaf, Greiner, Stephan, Griffiths, Joanna S., Grilo, Filipa, Gundel, Pedro E., Hamilton, Benjamin, Hardin, Joyce M., He, Tianhua, Heard, Stephen B., Henriques, Andre F., Hernandez-Poveda, Melissa, Hetherington-Rauth, Molly C., Hill, Sarah J., Hochuli, Dieter F., Hodgins, Kathryn A., Hood, Glen R., Hopkins, Gareth R., Hovanes, Katherine A., Howard, Ava R., Hubbard, Sierra C., Ibarra-Cerdena, Carlos N., Iniguez-Armijos, Carlos, Jara-Arancio, Paola, Jarrett, Benjamin J. M., Jeannot, Manon, Jimenez-Lobato, Vania, Johnson, Mae, Johnson, Oscar, Johnson, Philip P., Johnson, Reagan, Josephson, Matthew P., Jung, Meen Chel, Just, Michael G., Kahilainen, Aapo, Kailing, Otto S., Karinho-Betancourt, Eunice, Karousou, Regina, Kirn, Lauren A., Kirschbaum, Anna, Laine, Anna-Liisa, LaMontagne, Jalene M., Lampei, Christian, Lara, Carlos, Larson, Erica L., Lazaro-Lobo, Adrian, Le, Jennifer H., Leandro, Deleon S., Lee, Christopher, Lei, Yunting, Leon, Carolina A., Tamara, Manuel E. Lequerica, Levesque, Danica C., Liao, Wan-Jin, Ljubotina, Megan, Locke, Hannah, Lockett, Martin T., Longo, Tiffany C., Lundholm, Jeremy T., MacGillavry, Thomas, Mackin, Christopher R., Mahmoud, Alex R., Manju, Isaac A., Marien, Janine, Martinez, D. Nayeli, Martinez-Bartolome, Marina, Meineke, Emily K., Mendoza-Arroyo, Wendy, Merritt, Thomas J. S., Merritt, Lila Elizabeth L., Migiani, Giuditta, Minor, Emily S., Mitchell, Nora, Bazargani, Mitra Mohammadi, Moles, Angela T., Monk, Julia D., Moore, Christopher M., Morales-Morales, Paula A., Moyers, Brook T., Munoz-Rojas, Miriam, Munshi-South, Jason, Murphy, Shannon M., Murua, Maureen M., Neila, Melisa, Nikolaidis, Ourania, Njunji, Iva, Nosko, Peter, Nunez-Farfan, Juan, Ohgushi, Takayuki, Olsen, Kenneth M., Opedal, Oystein H., Ornelas, Cristina, Parachnowitsch, Amy L., Paratore, Aaron S., Parody-Merino, Angela M., Paule, Juraj, Paulo, Octavio S., Pena, Joao Carlos, Pfeiffer, Vera W., Pinho, Pedro, Piot, Anthony, Porth, Ilga M., Poulos, Nicholas, Puentes, Adriana, Qu, Jiao, Quintero-Vallejo, Estela, Raciti, Steve M., Raeymaekers, Joost A. M., Raveala, Krista M., Rennison, Diana J., Ribeiro, Milton C., Richardson, Jonathan L., Rivas-Torres, Gonzalo, Rivera, Benjamin J., Roddy, Adam B., Rodriguez-Munoz, Erika, Roman, Jose Raul, Rossi, Laura S., Rowntree, Jennifer K., Ryan, Travis J., Salinas, Santiago, Sanders, Nathan J., Santiago-Rosario, Luis Y., Savage, Amy M., Scheepens, J. F., Schilthuizen, Menno, Schneider, Adam C., Scholier, Tiffany, Scott, Jared L., Shaheed, Summer A., Shefferson, Richard P., Shepard, Caralee A., Shykoff, Jacqui A., Silveira, Georgianna, Smith, Alexis D., Solis-Gabriel, Lizet, Soro, Antonella, Spellman, Katie, V, Whitney, Kaitlin Stack, Starke-Ottich, Indra, Stephan, Jorg G., Stephens, Jessica D., Szulc, Justyna, Szulkin, Marta, Tack, Ayco J. M., Tamburrino, Italo, Tate, Tayler D., Tergemina, Emmanuel, Theodorou, Panagiotis, Thompson, Ken A., Threlfall, Caragh G., Tinghitella, Robin M., Toledo-Chelala, Lilibeth, Tong, Xin, Uroy, Lea, Utsumi, Shunsuke, Vandegehuchte, Martijn L., VanWallendael, Acer, Vidal, Paula M., Wadgymar, Susana M., Wang, Ai-Ying, Wang, Nian, Warbrick, Montana L., Whitney, Kenneth D., Wiesmeier, Miriam, Wiles, J. Tristian, Wu, Jianqiang, Xirocostas, Zoe A., Yan, Zhaogui, Yao, Jiahe, Yoder, Jeremy B., Yoshida, Owen, Zhang, Jingxiong, Zhao, Zhigang, Ziter, Carly D., Zuellig, Matthew P., Zufall, Rebecca A., Zurita, Juan E., Zytynska, Sharon E., and Johnson, Marc T. J.

Abstract

Urbanization transforms environments in ways that alter biological evolution. We examined whether urban environmental change drives parallel evolution by sampling 110,019 white clover plants from 6169 populations in 160 cities globally. Plants were assayed for a Mendelian antiherbivore defense that also affects tolerance to abiotic stressors. Urban-rural gradients were associated with the evolution of clines in defense in 47% of cities throughout the world. Variation in the strength of clines was explained by environmental changes in drought stress and vegetation cover that varied among cities. Sequencing 2074 genomes from 26 cities revealed that the evolution of urban-rural dines was best explained by adaptive evolution, but the degree of parallel adaptation varied among cities. Our results demonstrate that urbanization leads to adaptation at a global scale.

Published
2022
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30. Global urban environmental change drives adaptation in white clover

Author

Santangelo, James S., primary, Ness, Rob W., additional, Cohan, Beata, additional, Fitzpatrick, Connor R., additional, Innes, Simon G., additional, Koch, Sophie, additional, Miles, Lindsay S., additional, Munim, Samreen, additional, Peres-Neto, Pedro R., additional, Prashad, Cindy, additional, Tong, Alex T., additional, Aguirre, Windsor E., additional, Akinwole, Philips O., additional, Alberti, Marina, additional, Álvarez, Jackie, additional, Anderson, Jill T., additional, Anderson, Joseph J., additional, Ando, Yoshino, additional, Andrew, Nigel R., additional, Angeoletto, Fabio, additional, Anstett, Daniel N., additional, Anstett, Julia, additional, Aoki-Gonçalves, Felipe, additional, Arietta, A. Z. Andis, additional, Arroyo, Mary T. K., additional, Austen, Emily J., additional, Baena-Díaz, Fernanda, additional, Barker, Cory A., additional, Baylis, Howard A., additional, Beliz, Julia M., additional, Benitez-Mora, Alfonso, additional, Bickford, David, additional, Biedebach, Gabriela, additional, Blackburn, Gwylim S., additional, Boehm, Mannfred M. A., additional, Bonser, Stephen P., additional, Bonte, Dries, additional, Bragger, Jesse R., additional, Branquinho, Cristina, additional, Brans, Kristien I., additional, Bresciano, Jorge C., additional, Brom, Peta D., additional, Bucharova, Anna, additional, Burt, Briana, additional, Cahill, James F., additional, Campbell, Katelyn D., additional, Carlen, Elizabeth J., additional, Carmona, Diego, additional, Castellanos, Maria Clara, additional, Centenaro, Giada, additional, Chalen, Izan, additional, Chaves, Jaime A., additional, Chávez-Pesqueira, Mariana, additional, Chen, Xiao-Yong, additional, Chilton, Angela M., additional, Chomiak, Kristina M., additional, Cisneros-Heredia, Diego F., additional, Cisse, Ibrahim K., additional, Classen, Aimée T., additional, Comerford, Mattheau S., additional, Fradinger, Camila Cordoba, additional, Corney, Hannah, additional, Crawford, Andrew J., additional, Crawford, Kerri M., additional, Dahirel, Maxime, additional, David, Santiago, additional, De Haan, Robert, additional, Deacon, Nicholas J., additional, Dean, Clare, additional, del-Val, Ek, additional, Deligiannis, Eleftherios K., additional, Denney, Derek, additional, Dettlaff, Margarete A., additional, DiLeo, Michelle F., additional, Ding, Yuan-Yuan, additional, Domínguez-López, Moisés E., additional, Dominoni, Davide M., additional, Draud, Savannah L., additional, Dyson, Karen, additional, Ellers, Jacintha, additional, Espinosa, Carlos I., additional, Essi, Liliana, additional, Falahati-Anbaran, Mohsen, additional, Falcão, Jéssica C. F., additional, Fargo, Hayden T., additional, Fellowes, Mark D. E., additional, Fitzpatrick, Raina M., additional, Flaherty, Leah E., additional, Flood, Pádraic J., additional, Flores, María F., additional, Fornoni, Juan, additional, Foster, Amy G., additional, Frost, Christopher J., additional, Fuentes, Tracy L., additional, Fulkerson, Justin R., additional, Gagnon, Edeline, additional, Garbsch, Frauke, additional, Garroway, Colin J., additional, Gerstein, Aleeza C., additional, Giasson, Mischa M., additional, Girdler, E. Binney, additional, Gkelis, Spyros, additional, Godsoe, William, additional, Golemiec, Anneke M., additional, Golemiec, Mireille, additional, González-Lagos, César, additional, Gorton, Amanda J., additional, Gotanda, Kiyoko M., additional, Granath, Gustaf, additional, Greiner, Stephan, additional, Griffiths, Joanna S., additional, Grilo, Filipa, additional, Gundel, Pedro E., additional, Hamilton, Benjamin, additional, Hardin, Joyce M., additional, He, Tianhua, additional, Heard, Stephen B., additional, Henriques, André F., additional, Hernández-Poveda, Melissa, additional, Hetherington-Rauth, Molly C., additional, Hill, Sarah J., additional, Hochuli, Dieter F., additional, Hodgins, Kathryn A., additional, Hood, Glen R., additional, Hopkins, Gareth R., additional, Hovanes, Katherine A., additional, Howard, Ava R., additional, Hubbard, Sierra C., additional, Ibarra-Cerdeña, Carlos N., additional, Iñiguez-Armijos, Carlos, additional, Jara-Arancio, Paola, additional, Jarrett, Benjamin J. M., additional, Jeannot, Manon, additional, Jiménez-Lobato, Vania, additional, Johnson, Mae, additional, Johnson, Oscar, additional, Johnson, Philip P., additional, Johnson, Reagan, additional, Josephson, Matthew P., additional, Jung, Meen Chel, additional, Just, Michael G., additional, Kahilainen, Aapo, additional, Kailing, Otto S., additional, Kariñho-Betancourt, Eunice, additional, Karousou, Regina, additional, Kirn, Lauren A., additional, Kirschbaum, Anna, additional, Laine, Anna-Liisa, additional, LaMontagne, Jalene M., additional, Lampei, Christian, additional, Lara, Carlos, additional, Larson, Erica L., additional, Lázaro-Lobo, Adrián, additional, Le, Jennifer H., additional, Leandro, Deleon S., additional, Lee, Christopher, additional, Lei, Yunting, additional, León, Carolina A., additional, Lequerica Tamara, Manuel E., additional, Levesque, Danica C., additional, Liao, Wan-Jin, additional, Ljubotina, Megan, additional, Locke, Hannah, additional, Lockett, Martin T., additional, Longo, Tiffany C., additional, Lundholm, Jeremy T., additional, MacGillavry, Thomas, additional, Mackin, Christopher R., additional, Mahmoud, Alex R., additional, Manju, Isaac A., additional, Mariën, Janine, additional, Martínez, D. Nayeli, additional, Martínez-Bartolomé, Marina, additional, Meineke, Emily K., additional, Mendoza-Arroyo, Wendy, additional, Merritt, Thomas J. S., additional, Merritt, Lila Elizabeth L., additional, Migiani, Giuditta, additional, Minor, Emily S., additional, Mitchell, Nora, additional, Mohammadi Bazargani, Mitra, additional, Moles, Angela T., additional, Monk, Julia D., additional, Moore, Christopher M., additional, Morales-Morales, Paula A., additional, Moyers, Brook T., additional, Muñoz-Rojas, Miriam, additional, Munshi-South, Jason, additional, Murphy, Shannon M., additional, Murúa, Maureen M., additional, Neila, Melisa, additional, Nikolaidis, Ourania, additional, Njunjić, Iva, additional, Nosko, Peter, additional, Núñez-Farfán, Juan, additional, Ohgushi, Takayuki, additional, Olsen, Kenneth M., additional, Opedal, Øystein H., additional, Ornelas, Cristina, additional, Parachnowitsch, Amy L., additional, Paratore, Aaron S., additional, Parody-Merino, Angela M., additional, Paule, Juraj, additional, Paulo, Octávio S., additional, Pena, João Carlos, additional, Pfeiffer, Vera W., additional, Pinho, Pedro, additional, Piot, Anthony, additional, Porth, Ilga M., additional, Poulos, Nicholas, additional, Puentes, Adriana, additional, Qu, Jiao, additional, Quintero-Vallejo, Estela, additional, Raciti, Steve M., additional, Raeymaekers, Joost A. M., additional, Raveala, Krista M., additional, Rennison, Diana J., additional, Ribeiro, Milton C., additional, Richardson, Jonathan L., additional, Rivas-Torres, Gonzalo, additional, Rivera, Benjamin J., additional, Roddy, Adam B., additional, Rodriguez-Muñoz, Erika, additional, Román, José Raúl, additional, Rossi, Laura S., additional, Rowntree, Jennifer K., additional, Ryan, Travis J., additional, Salinas, Santiago, additional, Sanders, Nathan J., additional, Santiago-Rosario, Luis Y., additional, Savage, Amy M., additional, Scheepens, J.F., additional, Schilthuizen, Menno, additional, Schneider, Adam C., additional, Scholier, Tiffany, additional, Scott, Jared L., additional, Shaheed, Summer A., additional, Shefferson, Richard P., additional, Shepard, Caralee A., additional, Shykoff, Jacqui A., additional, Silveira, Georgianna, additional, Smith, Alexis D., additional, Solis-Gabriel, Lizet, additional, Soro, Antonella, additional, Spellman, Katie V., additional, Whitney, Kaitlin Stack, additional, Starke-Ottich, Indra, additional, Stephan, Jörg G., additional, Stephens, Jessica D., additional, Szulc, Justyna, additional, Szulkin, Marta, additional, Tack, Ayco J. M., additional, Tamburrino, Ítalo, additional, Tate, Tayler D., additional, Tergemina, Emmanuel, additional, Theodorou, Panagiotis, additional, Thompson, Ken A., additional, Threlfall, Caragh G., additional, Tinghitella, Robin M., additional, Toledo-Chelala, Lilibeth, additional, Tong, Xin, additional, Uroy, Léa, additional, Utsumi, Shunsuke, additional, Vandegehuchte, Martijn L., additional, VanWallendael, Acer, additional, Vidal, Paula M., additional, Wadgymar, Susana M., additional, Wang, Ai-Ying, additional, Wang, Nian, additional, Warbrick, Montana L., additional, Whitney, Kenneth D., additional, Wiesmeier, Miriam, additional, Wiles, J. Tristian, additional, Wu, Jianqiang, additional, Xirocostas, Zoe A., additional, Yan, Zhaogui, additional, Yao, Jiahe, additional, Yoder, Jeremy B., additional, Yoshida, Owen, additional, Zhang, Jingxiong, additional, Zhao, Zhigang, additional, Ziter, Carly D., additional, Zuellig, Matthew P., additional, Zufall, Rebecca A., additional, Zurita, Juan E., additional, Zytynska, Sharon E., additional, and Johnson, Marc T. J., additional

Published
2022
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32. Metabarcoding of canopy arthropods reveals negative impacts of forestry insecticides on community structure across multiple taxa

Author

Leroy, Benjamin M. L., primary, Seibold, Sebastian, additional, Morinière, Jérôme, additional, Bozicevic, Vedran, additional, Jaworek, Jessica, additional, Roth, Nicolas, additional, Vogel, Sebastian, additional, Zytynska, Sharon, additional, Petercord, Ralf, additional, Eichel, Peter, additional, and Weisser, Wolfgang W., additional

Published
2022
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37. The Efficiency of Plant Defense: Aphid Pest Pressure Does Not Alter Production of Food Rewards by Okra Plants in Ant Presence

Author

Singh, Akanksha, Mayer, Veronika E., Zytynska, Sharon E., Hesse, Benjamin, and Weisser, Wolfgang W.

Subjects
pearl bodies, ant preference, aphid honeydew, plant defense, pests, plant performance, Plant Science
Abstract

Pearl bodies are produced by some plant species as food reward for ants and in exchange, ants defend these plants against insect pests. Sap-sucking pests such as aphids also excrete honeydew as food reward for ants, leading to potential conflict where ants could preferentially defend either the plant or the aphid. How pest insects might influence plant pearl body production, is yet to be investigated. Okra is a widely consumed vegetable worldwide and is attacked by the ant-tended cotton aphid. The plants produce pearl bodies, which are predominantly found on the underside of the leaves and formed from epidermal cells. We conducted a set of field and greenhouse experiments to explore plant-aphid-ant interactions, their influence on pearl body production and resulting performance of okra plants, across okra varieties. We found that ants of Pheidole genus, which are dominant in okra fields, preferred pearl bodies over aphid honeydew; although, their highest abundance was recorded in presence of both these food rewards, and on one okra variety. Removal of pearl bodies from the plants increased their production; however, plant growth and chlorophyll content were negatively associated with pearl body replenishment. Potentially to mitigate this resource cost, plants developed such a novel defense response because we found that aphid presence reduced pearl body production, but only when there were no ants. Finally, aphids negatively affected plant performance, but only at very high densities. As aphids also attract ants, plants may tolerate their presence at low densities to attract higher ant abundances. Our study highlights that plants can adapt their defense strategies in pest presence for efficient resource use. We suggest that understanding pearl body associated interactions in crop plants can assist in using such traits for pest management., Frontiers in Plant Science, 12, ISSN:1664-462X

Published
2021

38. Benefits and costs of hosting facultative symbionts in plant-sucking insects: A meta-analysis

Author

Zytynska, Sharon E., Tighiouart, Karim, and Frago, Enric

Subjects
Symbiote, Insecte suceur, fungi, food and beverages, biochemical phenomena, metabolism, and nutrition, Analyse coût avantage, H10 - Ravageurs des plantes, Heteroptera, Interactions biologiques, Physiologie animale, Aphidoidea, L50 - Physiologie et biochimie animales
Abstract

Many animals have evolved associations with symbiotic microbes that benefit the host through increased growth, lifespan, and survival. Some interactions are obligate (essential for survival) while others are facultative (usually beneficial but not essential). Not all individuals host all facultative symbionts in a population, and thus there is probably a trade-off between the cost of hosting these symbionts and the benefits they confer to the host. Plant-sucking insects have been one of the most important models to test these costs and benefits experimentally. This research is now moving beyond the description of symbiont effects towards understanding the mechanisms of action, and their role in the wider ecological community. We present a quantitative and systematic analysis of the published evidence exploring this question. We found that whitefly and true bugs experience benefits through increased growth and fecundity, whereas aphids experience costs to their fecundity but benefits through increased resistance to natural enemies. We also report the lack of data in some plant-sucking groups, and explore variation in effect strengths and directions across aphid host, symbiont and plant species thus highlighting the importance of considering the context dependency of these interactions.

Published
2021

48. Landscape does matter: Disentangling founder effects from natural and human‐aided post‐introduction dispersal during an ongoing biological invasion.

Author

Sherpa, Stéphanie, Renaud, Julien, Guéguen, Maya, Besnard, Gilles, Mouyon, Loic, Rey, Delphine, Després, Laurence, and Zytynska, Sharon

Subjects
DISPERSAL (Ecology), BIOLOGICAL invasions, AEDES albopictus, INTRODUCED species, CITY dwellers, CITIES & towns, HUMAN genetics
Abstract

Environmental features impacting the spread of invasive species after introduction can be assessed using population genetic structure as a quantitative estimation of effective dispersal at the landscape scale. However, in the case of an ongoing biological invasion, deciphering whether genetic structure represents landscape connectivity or founder effects is particularly challenging.We examined the modes of dispersal (natural and human‐aided) and the factors (landscape or founders history) shaping genetic structure in range edge invasive populations of the Asian tiger mosquito, Aedes albopictus, in the region of Grenoble (Southeast France).Based on detailed occupancy–detection data and environmental variables (climatic, topographic and land‐cover), we modelled A. albopictus potential suitable area and its expansion history since first introduction. The relative role of dispersal modes was estimated using biological dispersal capabilities and landscape genetics approaches using genome‐wide SNP dataset.We demonstrate that both natural and human‐aided dispersal have promoted the expansion of populations. Populations in diffuse urban areas, representing highly suitable habitat for A. albopictus, tend to disperse less, while roads facilitate long‐distance dispersal. Yet, demographic bottlenecks during introduction played a major role in shaping the genetic variability of these range edge populations.The present study is one of the few investigating the role of founder effects and ongoing expansion processes in shaping spatial patterns of genetic variation in an invasive species at the landscape scale. The combination of several dispersal modes and large proportions of continuous suitable habitats for A. albopictus promoted range filling of almost its entire potential distribution in the region of Grenoble only few years after introduction. [ABSTRACT FROM AUTHOR]

Published
2020
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49. Host plant phenology, insect outbreaks and herbivore communities – The importance of timing.

Author

Ekholm, Adam, Tack, Ayco J. M., Pulkkinen, Pertti, Roslin, Tomas, and Zytynska, Sharon

Subjects
HOST plants, PLANT phenology, CHEMICAL ecology, HERBIVORES, INSECT communities, ENGLISH oak, LEAFMINERS
Abstract

Climate change may alter the dynamics of outbreak species by changing the phenological synchrony between herbivores and their host plants. As host plant phenology has a genotypic component that may interact with climate, infestation levels among genotypes might change accordingly. When the outbreaking herbivore is active early in the season, its infestation levels may also leave a detectable imprint on herbivores colonizing the plant later in the season.In this study, we first investigated how the spring phenology and genotype of Quercus robur influenced the density of the spring‐active, outbreaking leaf miner Acrocercops brongniardellus. We then assessed how intraspecific density affected the performance of A. brongniardellus and how oak genotype and density of A. brongniardellus affected the insect herbivore community.We found that Q. robur individuals of late spring phenology were more strongly infested by A. brongniardellus. Conspecific pupae on heavily infested oaks tended to be lighter, and fewer heterospecific insect herbivores colonized the oak later in the season. Beyond its effects through phenology, plant genotype left an imprint on herbivore species richness and on two insect herbivores.Our results suggest a chain of knock‐on effects from plant phenology, through the outbreaking species to the insect herbivore community. Given the finding of how phenological synchrony between the outbreak species and its host plant influences infestation levels, a shift in synchrony may then change outbreak dynamics and cause cascading effects on the insect community. [ABSTRACT FROM AUTHOR]

Published
2020
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