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McCard M, McCard N, Coughlan NE, South J, Kregting L, Dick JTA. Functional response metrics explain and predict high but differing ecological impacts of juvenile and adult lionfish. ROYAL SOCIETY OPEN SCIENCE 2024; 11:240855. [PMID: 39169969 PMCID: PMC11335401 DOI: 10.1098/rsos.240855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2024] [Revised: 07/19/2024] [Accepted: 07/22/2024] [Indexed: 08/23/2024]
Abstract
Recent accumulation of evidence across taxa indicates that the ecological impacts of invasive alien species are predictable from their functional response (FR; e.g. the maximum feeding rate) and functional response ratio (FRR; the FR attack rate divided by handling time). Here, we experimentally derive these metrics to predict the ecological impacts of both juvenile and adult lionfish (Pterois volitans), one of the world's most damaging invaders, across representative and likely future prey types. Potentially prey-population destabilizing Type II FRs were exhibited by both life stages of lionfish towards four prey species: Artemia salina, Gammarus oceanicus, Palaemonetes varians and Nephrops norvegicus. FR magnitudes revealed ontogenetic shifts in lionfish impacts where juvenile lionfish displayed similar if not higher consumption rates than adult lionfish towards prey, apart from N. norvegicus, where adult consumption rate was considerably higher. Additionally, lionfish FRR values were very substantially higher than mean FRR values across known damaging invasive taxa. Thus, both life stages of lionfish are predicted to contribute to differing but high ecological impacts across prey communities, including commercially important species. With lionfish invasion ranges currently expanding across multiple regions globally, efforts to reduce lionfish numbers and population size structure, with provision of prey refugia through habitat complexity, might curtail their impacts. Nevertheless, the present study indicates that management programmes to support early detection and complete eradication of lionfish individuals when discovered in new regions are advised.
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Affiliation(s)
- Monica McCard
- Institute for Global Food Security, School of Biological Sciences, Queen’s University Belfast, 19 Chlorine Gardens, BelfastBT9 5DL, UK
- Queen’s University Marine Laboratory, 12–13 The Strand, PortaferryBT22 1PF, UK
- School of Biological and Environmental Sciences, Liverpool John Moore University, Byrom Street, LiverpoolL3 3AF, UK
| | - Nathan McCard
- Queen’s University Marine Laboratory, 12–13 The Strand, PortaferryBT22 1PF, UK
| | - Neil E. Coughlan
- Institute for Global Food Security, School of Biological Sciences, Queen’s University Belfast, 19 Chlorine Gardens, BelfastBT9 5DL, UK
- Queen’s University Marine Laboratory, 12–13 The Strand, PortaferryBT22 1PF, UK
- School of Biological, Earth and Environmental Sciences, University College Cork, Distillery Fields, North Mall, Cork, Ireland
| | - Josie South
- Water@Leeds, School of Biology, University of Leeds, Woodhouse, LeedsLS2 9JT, UK
| | - Louise Kregting
- Queen’s University Marine Laboratory, 12–13 The Strand, PortaferryBT22 1PF, UK
- The New Zealand Institute for Plant and Food Research Ltd, Nelson, New Zealand
| | - Jaimie T. A. Dick
- Institute for Global Food Security, School of Biological Sciences, Queen’s University Belfast, 19 Chlorine Gardens, BelfastBT9 5DL, UK
- Queen’s University Marine Laboratory, 12–13 The Strand, PortaferryBT22 1PF, UK
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Boldorini GX, Mccary MA, Romero GQ, Mills KL, Sanders NJ, Reich PB, Michalko R, Gonçalves-Souza T. Predators control pests and increase yield across crop types and climates: a meta-analysis. Proc Biol Sci 2024; 291:20232522. [PMID: 38444337 PMCID: PMC10915543 DOI: 10.1098/rspb.2023.2522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Accepted: 02/08/2024] [Indexed: 03/07/2024] Open
Abstract
Pesticides have well-documented negative consequences to control crop pests, and natural predators are alternatives and can provide an ecosystem service as biological control agents. However, there remains considerable uncertainty regarding whether such biological control can be a widely applicable solution, especially given ongoing climatic variation and climate change. Here, we performed a meta-analysis focused on field studies with natural predators to explore broadly whether and how predators might control pests and in turn increase yield. We also contrasted across studies pest suppression by a single and multiple predators and how climate influence biological control. Predators reduced pest populations by 73% on average, and increased crop yield by 25% on average. Surprisingly, the impact of predators did not depend on whether there were many or a single predator species. Precipitation seasonality was a key climatic influence on biological control: as seasonality increased, the impact of predators on pest populations increased. Taken together, the positive contribution of predators in controlling pests and increasing yield, and the consistency of such responses in the face of precipitation variability, suggest that biocontrol has the potential to be an important part of pest management and increasing food supplies as the planet precipitation patterns become increasingly variable.
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Affiliation(s)
- Gabriel X. Boldorini
- Department of Biology, Ecological Synthesis and Biodiversity Conservation Lab, Federal Rural University of Pernambuco, Recife, Brazil
- Graduate Program in Ethnobiology and Nature Conservation, Department of Biology, Federal Rural University of Pernambuco, Recife, Brazil
| | | | - Gustavo Q. Romero
- Department of Animal Biology, Institute of Biology, State University of Campinas, Campinas, Brazil
| | - Kirby L. Mills
- Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, MI, USA
| | - Nathan J. Sanders
- Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, MI, USA
| | - Peter B. Reich
- Institute for Global Change Biology, School for Environment and Sustainability, University of Michigan, Ann Arbor, MI, USA
- Department of Forest Resources, University of Minnesota, St Paul, MN 55108, USA
| | - Radek Michalko
- Department of Forest Ecology, Faculty of Forestry and Wood Technology, Mendel University in Brno, Zemědělská 3, 613 00 Brno, Czech Republic
| | - Thiago Gonçalves-Souza
- Department of Biology, Ecological Synthesis and Biodiversity Conservation Lab, Federal Rural University of Pernambuco, Recife, Brazil
- Graduate Program in Ethnobiology and Nature Conservation, Department of Biology, Federal Rural University of Pernambuco, Recife, Brazil
- Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, MI, USA
- Institute for Global Change Biology, School for Environment and Sustainability, University of Michigan, Ann Arbor, MI, USA
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3
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Ganem Z, Ferrante M, Lubin Y, Armiach Steinpress I, Gish M, Sharon R, Harari AR, Keasar T, Gavish-Regev E. Effects of Natural Habitat and Season on Cursorial Spider Assemblages in Mediterranean Vineyards. INSECTS 2023; 14:782. [PMID: 37887794 PMCID: PMC10607350 DOI: 10.3390/insects14100782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2023] [Revised: 09/19/2023] [Accepted: 09/22/2023] [Indexed: 10/28/2023]
Abstract
Natural habitats adjacent to vineyards are presumed to have a positive effect on the diversity of natural enemies within the vineyards. However, these habitats differ in vegetation structure and seasonal phenology and in turn could affect the species composition of natural enemies. Here, we compared the species richness and diversity and the composition of spider assemblages in several locations within three commercial vineyards and the nearby natural habitats in a Mediterranean landscape in northern Israel. We sampled spiders by means of pitfall traps in early and in late summer. Both the time in the season and the habitat (natural versus vineyard) affected spider species richness and diversity. More species were found in early summer (47) than in late summer (33), and more occurred in the natural habitat (34 species) than in the vineyards (27-31 species). Fifteen species were found exclusively in the natural habitat, and only 11 species were shared by the vineyards and natural habitat, four of which were the most abundant and geographically widely distributed species in the samples. In late summer, spider diversity in the natural habitat was higher than within the vineyards: the spider assemblages in the vineyards became dominated by a few species late in the crop season, while those of the natural habitat remained stable. Overall, the natural habitat differed in assemblage composition from all within-vineyard locations, while the three locations within the vineyard did not differ significantly in assemblage composition. Season (early vs. late summer), however, significantly affected the spider assemblage composition. This study documents the large diversity of spiders in a local Mediterranean vineyard agroecosystem. Over 60% of the known spider families in the region occurred in our samples, highlighting the importance of this agroecosystem for spider diversity and the potential for conservation biocontrol, where natural habitats may be a source of natural enemies for nearby vineyards.
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Affiliation(s)
- Zeana Ganem
- The National Natural History Collections, The Hebrew University of Jerusalem, Jerusalem 9190401, Israel
- School of Environmental Sciences, University of Haifa, Haifa 3103301, Israel
| | - Marco Ferrante
- Centre for Ecology, Evolution and Environmental Changes (cE3c), Azorean Biodiversity Group, Faculty of Agriculture and Environment, University of the Azores, Angra do Heroísmo, 9700-042 Azores, Portugal
- Mitrani Department of Desert Ecology, Ben-Gurion University of the Negev, Midreshet Ben-Gurion 8499000, Israel
| | - Yael Lubin
- Mitrani Department of Desert Ecology, Ben-Gurion University of the Negev, Midreshet Ben-Gurion 8499000, Israel
| | - Igor Armiach Steinpress
- The National Natural History Collections, The Hebrew University of Jerusalem, Jerusalem 9190401, Israel
| | - Moshe Gish
- School of Environmental Sciences, University of Haifa, Haifa 3103301, Israel
| | - Rakefet Sharon
- Northern R&D, MIGAL-Galilee Technology Center and Tel-Hai Academic College, Qiryat Shemona 1220800, Israel
| | - Ally R Harari
- Department of Entomology, Agricultural Research Organization, The Volcani Center, Bet Dagan 7505101, Israel
| | - Tamar Keasar
- Department of Biology and the Environment, University of Haifa-Oranim, Tivon 3600600, Israel
| | - Efrat Gavish-Regev
- The National Natural History Collections, The Hebrew University of Jerusalem, Jerusalem 9190401, Israel
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Řezáč M, Řezáčová V, Gloríková N, Némethová E, Heneberg P. Food provisioning to Pardosa spiders decreases the levels of tissue-resident endosymbiotic bacteria. Sci Rep 2023; 13:6943. [PMID: 37117271 PMCID: PMC10147729 DOI: 10.1038/s41598-023-34229-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Accepted: 04/26/2023] [Indexed: 04/30/2023] Open
Abstract
The diversity, host specificity, and physiological effects of endosymbiotic bacteria in spiders (Araneae) are poorly characterized. We used 16S rDNA sequencing to evaluate endosymbionts in the cephalothorax and legs of a wolf spider Pardosa agrestis. We tested the effects of feeding once or twice daily with fruit flies, aphids, or starved and compared them to those of syntopically occurring Pardosa palustris. The feeding increased traveled distance up to five times in some of the groups provisioned with food relative to the starved control. The Shannon diversity t-test revealed significant differences between these component communities of the two spider species. The increased frequency of feeding with fruit flies, but not aphids, increased the dominance and decreased the alpha diversity of OTUs. The obligate or facultative endosymbionts were present in all analyzed spider individuals and were represented mostly by Rickettsiella, Rhabdochlamydia, Spiroplasma, and the facultative intracellular parasite Legionella. Vertically transmitted endosymbionts were less common, represented by Wolbachia pipientis and Rickettsia sp. H820. The relative abundance of Mycoplasma spp. was negatively correlated with provisioned or killed aphids. In conclusion, the tissues of Pardosa spiders host tremendously diverse assemblages of bacteria, including obligate or facultative endosymbionts, with yet unknown phenotypic effects.
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Affiliation(s)
- Milan Řezáč
- Crop Research Institute, Drnovská 507, 160 00, Prague, Czech Republic
| | - Veronika Řezáčová
- Crop Research Institute, Drnovská 507, 160 00, Prague, Czech Republic.
| | - Nela Gloríková
- Crop Research Institute, Drnovská 507, 160 00, Prague, Czech Republic
| | - Ema Némethová
- Crop Research Institute, Drnovská 507, 160 00, Prague, Czech Republic
| | - Petr Heneberg
- Crop Research Institute, Drnovská 507, 160 00, Prague, Czech Republic.
- Charles University, Third Faculty of Medicine, Ruská 87, 100 00, Prague, Czech Republic.
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Zhang X, Wu Q, Mu J, Chao Z, He Q, Gao T, Wang C, McNeill MR, Lu Z. The Efficacy of Biological Control for the Suppression of the Pea Aphid (Acyrthosiphon Pisum): Does the Resistance of Alfalfa Cultivars Matter? INSECTS 2022; 14:28. [PMID: 36661956 PMCID: PMC9867372 DOI: 10.3390/insects14010028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/26/2022] [Revised: 12/21/2022] [Accepted: 12/23/2022] [Indexed: 06/17/2023]
Abstract
The pea aphid, Acyrthosiphon pisum Harris, is a major pest of alfalfa in northwestern China. However, the roles of different groups of natural enemies in combination with aphid-resistant cultivars in the suppression of the pea aphid have not been clarified under field conditions. In this study, we used experimental cages to better understand the top-down (natural enemies) and bottom-up (nine alfalfa cultivars) biological processes, as well as the individual roles of the two processes, in the control of the pea aphid. There was a significant difference in resistance among cultivar classes revealed when natural enemies were excluded. The functional contribution of top-down suppression was higher than the bottom-up process, with natural enemies significantly suppressing aphid populations, regardless of the resistance level of different alfalfa cultivars. The mean biological efficacies of predators, parasitoids, and mixed populations of natural enemies were 85%, 42%, and 88%, respectively. Overall, our study indicated that natural enemies play a critical role in suppressing aphid populations, especially in the summer, whereas cultivar resistance did not combine effectively with natural enemies to inhibit the growth of aphids. Conservation biological control (CBC) can be implemented in the alfalfa production regions in northwestern China to reduce the overreliance on insecticides for the control of pests and mitigate their harmful effects on humans, ecosystems, and biodiversity.
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Affiliation(s)
- Xiang Zhang
- The First-Class Discipline of Prataculture Science of Ningxia University (No. NXYLXK2017A01), College of Agriculture, Ningxia University, Yinchuan 750021, China
| | - Qiong Wu
- The First-Class Discipline of Prataculture Science of Ningxia University (No. NXYLXK2017A01), College of Agriculture, Ningxia University, Yinchuan 750021, China
| | - Jianing Mu
- The First-Class Discipline of Prataculture Science of Ningxia University (No. NXYLXK2017A01), College of Agriculture, Ningxia University, Yinchuan 750021, China
| | - Zunqi Chao
- The First-Class Discipline of Prataculture Science of Ningxia University (No. NXYLXK2017A01), College of Agriculture, Ningxia University, Yinchuan 750021, China
| | - Qi He
- The First-Class Discipline of Prataculture Science of Ningxia University (No. NXYLXK2017A01), College of Agriculture, Ningxia University, Yinchuan 750021, China
| | - Ting Gao
- Protection Institute, Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan 750002, China
| | - Chuan Wang
- Protection Institute, Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan 750002, China
| | - Mark R. McNeill
- AgResearch Ltd., Lincoln Research Centre, Christchurch 8140, New Zealand
| | - Zhaozhi Lu
- The First-Class Discipline of Prataculture Science of Ningxia University (No. NXYLXK2017A01), College of Agriculture, Ningxia University, Yinchuan 750021, China
- Shandong Engineering Research Center for Environment-Friendly Agricultural Pest Management, College of Plant Health and Medicine, Qingdao Agricultural University, Qingdao 266109, China
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6
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Řezáč M, Přibáňová G, Gloríková N, Heneberg P. Contact exposure to neonicotinoid insecticides temporarily suppresses the locomotor activity of Pardosa lugubris agrobiont wolf spiders. Sci Rep 2022; 12:14745. [PMID: 36042361 PMCID: PMC9427997 DOI: 10.1038/s41598-022-18842-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Accepted: 08/22/2022] [Indexed: 12/04/2022] Open
Abstract
Exposure to numerous chemicals disrupts the spiders' locomotion. Spiders, particularly epigeic spiders, are dependent on their locomotory activities to search for prey, hide from their enemies, and perform sexual reproduction and subsequent parental care. Among the best-known compounds that inhibit the locomotion of arthropods are neonicotinoids. Despite spiders are less affected by the neonicotinoids than insects due to the sequence differences in their acetylcholine receptors, they are not resistant to these compounds. We hypothesized that acute exposure to a broad spectrum of neonicotinoids suppresses the traveled distance, mean velocity, and maximum velocity in epigeic spiders. As a model species, we used adults of Pardosa lugubris. We tested commercial formulations of thiamethoxam, acetamiprid, and thiacloprid. We tested each of the neonicotinoids in the maximum and minimum concentrations recommended for foliar applications. We applied them under controlled conditions dorsally by spraying them directly on the spiders or exposing the spiders to the tarsal contact with neonicotinoid residues. Control groups consisted of 31 individuals; treated groups consisted of 10–21 individuals. We found that a broad spectrum of neonicotinoids temporarily suppresses the traveled distance in epigeic spiders. At 1 h after application, all the three tested neonicotinoid insecticides induced declines in the traveled distance, but this effect mostly disappeared when tested at 24 h after the application. The decrease in the traveled distance was associated with substantial temporary decreases in the mean and maximum velocities. Despite differences among modalities, all three insecticides caused multiple adverse effects on the locomotory parameters in any tested concentrations. It remains to test what would be the lowest safe concentration for the chronic exposure to neonicotinoids in epigeic spiders.
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Affiliation(s)
- Milan Řezáč
- Crop Research Institute, Prague, Czech Republic
| | | | | | - Petr Heneberg
- Third Faculty of Medicine, Charles University, Ruská 87, 100 00, Prague, Czech Republic.
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Sacco–Martret de Préville A, Ortiz-Martinez S, Plantegenest M, Canard E. Effect of Conservation Agriculture on Aphid Biocontrol by Generalist (Carabid Beetle) and Specialist (Parasitoids Wasp) Natural Enemy Communities in Winter Wheat. Front Ecol Evol 2022. [DOI: 10.3389/fevo.2022.893787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Adoption of practices that reduce the risk of pest outbreaks is one of the pillars of agroecology and is largely based on biological control. Multiple infield and landscape parameters affect biocontrol, but the effects of conservation soil management on biological control have been poorly investigated over crop season. By comparing winter wheat fields within the same landscape but with different soil management, the direct and indirect effects of soil management (conservation and conventional systems) on natural enemies’ communities and their biological control on aphids was studied from the tillering stage to the harvest. In addition to aphid infestation, two families of the main natural enemies’ guilds were monitored, as well as their associated services: aphid parasitoid, a specialist and flying natural enemy, with parasitism service, and carabid beetles, a generalist and ground-dwelling predator, with aphidophagy service. Soil conservation system hosted more abundant and diverse carabid beetles’ assemblages, and received higher aphidophagy service in June than conventional system. However, neither parasitoid abundance, nor parasitism rates, were affected by soil management. Aphid infestation and its associated damage did not depend on soil management either. Our results suggest that ground-dwelling natural enemies are more impacted by soil management than foliage-dwelling natural enemies, which is partly reflected in aphid biocontrol. In agricultural systems with reduced soil perturbation, direct mortality on ground-dwelling communities due to tillage may be lower than in a conventional system, but habitat heterogeneity is also greater, increasing the number of ecological niches for natural enemies. Both factors are supposed to favor an early presence of natural enemies and a tendency toward a precocious aphidophagy service is indeed observed in conservation system.
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Mishra A, Kumar B, Rastogi N. Do the food availability conditions influence the stage-specific prey choice and predation attributes of agroecosystem-inhabiting spiders? Trop Ecol 2022. [DOI: 10.1007/s42965-022-00222-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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9
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Potapov AM, Beaulieu F, Birkhofer K, Bluhm SL, Degtyarev MI, Devetter M, Goncharov AA, Gongalsky KB, Klarner B, Korobushkin DI, Liebke DF, Maraun M, Mc Donnell RJ, Pollierer MM, Schaefer I, Shrubovych J, Semenyuk II, Sendra A, Tuma J, Tůmová M, Vassilieva AB, Chen T, Geisen S, Schmidt O, Tiunov AV, Scheu S. Feeding habits and multifunctional classification of soil‐associated consumers from protists to vertebrates. Biol Rev Camb Philos Soc 2022; 97:1057-1117. [DOI: 10.1111/brv.12832] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 12/31/2021] [Accepted: 01/05/2022] [Indexed: 12/17/2022]
Affiliation(s)
- Anton M. Potapov
- J.F. Blumenbach Institute of Zoology and Anthropology University of Göttingen Untere Karspüle 2 37073 Göttingen Germany
- A.N. Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences Leninsky Prospect 33 119071 Moscow Russia
| | - Frédéric Beaulieu
- Canadian National Collection of Insects, Arachnids and Nematodes, Agriculture and Agri‐Food Canada Ottawa ON K1A 0C6 Canada
| | - Klaus Birkhofer
- Department of Ecology Brandenburg University of Technology Karl‐Wachsmann‐Allee 6 03046 Cottbus Germany
| | - Sarah L. Bluhm
- J.F. Blumenbach Institute of Zoology and Anthropology University of Göttingen Untere Karspüle 2 37073 Göttingen Germany
| | - Maxim I. Degtyarev
- A.N. Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences Leninsky Prospect 33 119071 Moscow Russia
| | - Miloslav Devetter
- Biology Centre of the Czech Academy of Sciences, Institute of Soil Biology Na Sádkách 702/7 37005 České Budějovice Czech Republic
| | - Anton A. Goncharov
- A.N. Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences Leninsky Prospect 33 119071 Moscow Russia
| | - Konstantin B. Gongalsky
- A.N. Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences Leninsky Prospect 33 119071 Moscow Russia
| | - Bernhard Klarner
- J.F. Blumenbach Institute of Zoology and Anthropology University of Göttingen Untere Karspüle 2 37073 Göttingen Germany
| | - Daniil I. Korobushkin
- A.N. Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences Leninsky Prospect 33 119071 Moscow Russia
| | - Dana F. Liebke
- J.F. Blumenbach Institute of Zoology and Anthropology University of Göttingen Untere Karspüle 2 37073 Göttingen Germany
| | - Mark Maraun
- J.F. Blumenbach Institute of Zoology and Anthropology University of Göttingen Untere Karspüle 2 37073 Göttingen Germany
| | - Rory J. Mc Donnell
- Department of Crop and Soil Science Oregon State University Corvallis OR 97331 U.S.A
| | - Melanie M. Pollierer
- J.F. Blumenbach Institute of Zoology and Anthropology University of Göttingen Untere Karspüle 2 37073 Göttingen Germany
| | - Ina Schaefer
- J.F. Blumenbach Institute of Zoology and Anthropology University of Göttingen Untere Karspüle 2 37073 Göttingen Germany
| | - Julia Shrubovych
- Biology Centre of the Czech Academy of Sciences, Institute of Soil Biology Na Sádkách 702/7 37005 České Budějovice Czech Republic
- Institute of Systematics and Evolution of Animals PAS Slawkowska 17 Pl 31‐016 Krakow Poland
- State Museum Natural History of NAS of Ukraine Teatralna 18 79008 Lviv Ukraine
| | - Irina I. Semenyuk
- A.N. Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences Leninsky Prospect 33 119071 Moscow Russia
- Joint Russian‐Vietnamese Tropical Center №3 Street 3 Thang 2, Q10 Ho Chi Minh City Vietnam
| | - Alberto Sendra
- Colecciones Entomológicas Torres‐Sala, Servei de Patrimoni Històric, Ajuntament de València València Spain
- Departament de Didàctica de les Cièncias Experimentals i Socials, Facultat de Magisteri Universitat de València València Spain
| | - Jiri Tuma
- Biology Centre of the Czech Academy of Sciences, Institute of Soil Biology Na Sádkách 702/7 37005 České Budějovice Czech Republic
- Biology Centre CAS, Institute of Entomology Branisovska 1160/31 370 05 Ceske Budejovice Czech Republic
| | - Michala Tůmová
- Biology Centre of the Czech Academy of Sciences, Institute of Soil Biology Na Sádkách 702/7 37005 České Budějovice Czech Republic
| | - Anna B. Vassilieva
- A.N. Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences Leninsky Prospect 33 119071 Moscow Russia
| | - Ting‐Wen Chen
- Biology Centre of the Czech Academy of Sciences, Institute of Soil Biology Na Sádkách 702/7 37005 České Budějovice Czech Republic
| | - Stefan Geisen
- Department of Nematology Wageningen University & Research 6700ES Wageningen The Netherlands
| | - Olaf Schmidt
- UCD School of Agriculture and Food Science University College Dublin Belfield Dublin 4 Ireland
| | - Alexei V. Tiunov
- A.N. Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences Leninsky Prospect 33 119071 Moscow Russia
| | - Stefan Scheu
- J.F. Blumenbach Institute of Zoology and Anthropology University of Göttingen Untere Karspüle 2 37073 Göttingen Germany
- Centre of Biodiversity and Sustainable Land Use Büsgenweg 1 37077 Göttingen Germany
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10
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Junggebauer A, Hartke TR, Ramos D, Schaefer I, Buchori D, Hidayat P, Scheu S, Drescher J. Changes in diversity and community assembly of jumping spiders (Araneae: Salticidae) after rainforest conversion to rubber and oil palm plantations. PeerJ 2021; 9:e11012. [PMID: 33717710 PMCID: PMC7937343 DOI: 10.7717/peerj.11012] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Accepted: 02/05/2021] [Indexed: 11/20/2022] Open
Abstract
Rainforest conversion into monoculture plantations results in species loss and community shifts across animal taxa. The effect of such conversion on the role of ecophysiological properties influencing communities, and conversion effects on phylogenetic diversity and community assembly mechanisms, however, are rarely studied in the same context. Here, we compare salticid spider (Araneae: Salticidae) communities between canopies of lowland rainforest, rubber agroforest (“jungle rubber”) and monoculture plantations of rubber or oil palm, sampled in a replicated plot design in Jambi Province, Sumatra, Indonesia. Overall, we collected 912 salticid spider individuals and sorted them to 70 morphospecies from 21 genera. Salticid richness was highest in jungle rubber, followed by rainforest, oil palm and rubber, but abundance of salticids did not differ between land-use systems. Community composition was similar in jungle rubber and rainforest but different from oil palm and rubber, which in turn were different from each other. The four investigated land-use systems differed in aboveground plant biomass, canopy openness and land use intensity, which explained 12% of the observed variation in canopy salticid communities. Phylogenetic diversity based on ~850 bp 28S rDNA fragments showed similar patterns as richness, that is, highest in jungle rubber, intermediate in rainforest, and lowest in the two monoculture plantations. Additionally, we found evidence for phylogenetic clustering of salticids in oil palm, suggesting that habitat filtering is an important factor shaping salticid spider communities in monoculture plantations. Overall, our study offers a comprehensive insight into the mechanisms shaping communities of arthropod top predators in canopies of tropical forest ecosystems and plantations, combining community ecology, environmental variables and phylogenetics across a land-use gradient in tropical Asia.
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Affiliation(s)
- André Junggebauer
- Department of Animal Ecology, J-F. Blumenbach Institute for Zoology and Anthropology, University of Göttingen, Göttingen, Germany
| | - Tamara R Hartke
- Department of Animal Ecology, J-F. Blumenbach Institute for Zoology and Anthropology, University of Göttingen, Göttingen, Germany
| | - Daniel Ramos
- Department of Animal Ecology, J-F. Blumenbach Institute for Zoology and Anthropology, University of Göttingen, Göttingen, Germany
| | - Ina Schaefer
- Department of Animal Ecology, J-F. Blumenbach Institute for Zoology and Anthropology, University of Göttingen, Göttingen, Germany
| | - Damayanti Buchori
- Department of Plant Protection, Faculty of Agriculture, Bogor Agricultural University, Bogor, Indonesia.,Center for Transdisciplinary and Sustainability Sciences, IPB University, Bogor, Indonesia
| | - Purnama Hidayat
- Department of Plant Protection, Faculty of Agriculture, Bogor Agricultural University, Bogor, Indonesia
| | - Stefan Scheu
- Department of Animal Ecology, J-F. Blumenbach Institute for Zoology and Anthropology, University of Göttingen, Göttingen, Germany.,Centre of Biodiversity and Sustainable Land Use, University of Göttingen, Göttingen, Germany
| | - Jochen Drescher
- Department of Animal Ecology, J-F. Blumenbach Institute for Zoology and Anthropology, University of Göttingen, Göttingen, Germany
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11
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Lacava M, García LF, Viera C, Michalko R. The pest-specific effects of glyphosate on functional response of a wolf spider. CHEMOSPHERE 2021; 262:127785. [PMID: 33182149 DOI: 10.1016/j.chemosphere.2020.127785] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 07/19/2020] [Accepted: 07/20/2020] [Indexed: 06/11/2023]
Abstract
Although glyphosate is widely used for weed pest control, it might have negative side effects on natural enemies. Wolf spiders are one of the most representative predators found on soybean crops in Uruguay, preying on a wide variety of potential pests. However, the sublethal effects that pesticides might have on this group have been poorly explored for South American species. Herein, we explored the sublethal effects of glyphosate on the functional response of the wolf spider Hogna cf. bivittata against three potential pest insects, namely ant (Acromyrmex sp.), caterpillar (Anticarsia gemmatalis), and cricket (Miogryllus sp.). We contaminated residually adult females of the species Hogna cf. bivittata with glyphosate (Roundup®) and compared their functional response against non-contaminated spiders. We did not observe any mortality during the study. We found that overall Hogna cf. bivittata showed a functional response type II against crickets and caterpillars but no functional response to ants. Contaminated spiders killed less ants and caterpillars in comparison to the control group, probably as a consequence of the irritating effects of glyphosate. We did not observe differences in functional response to crickets at the evaluated densities, probably as a consequence of the low capture rate against this prey. Although glyphosate does not specifically target spiders, it might have negative sublethal effects on native predators such as Hogna cf. bivittata. Further studies should explore effect of glyphosate on other native predators from South American crops.
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Affiliation(s)
- Mariángeles Lacava
- Centro Universitario de Rivera, Universidad de La República, Rivera, Uruguay
| | - Luis Fernando García
- Centro Universitario Regional Del Este, Universidad de La República, Treinta y Tres, Uruguay.
| | - Carmen Viera
- Facultad de Ciencias, Universidad de La República, Montevideo, Uruguay; Laboratorio de Ecología del Comportamiento, Instituto de Investigaciones Biológicas Clemente Estable, Ministerio de Educación y Cultura, Montevideo, Uruguay.
| | - Radek Michalko
- Department of Forest Ecology, Mendel University, Brno, Czech Republic
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12
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Local management and landscape structure determine the assemblage patterns of spiders in vegetable fields. Sci Rep 2020; 10:15130. [PMID: 32934310 PMCID: PMC7493935 DOI: 10.1038/s41598-020-71888-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Accepted: 06/26/2020] [Indexed: 11/23/2022] Open
Abstract
Both field- and landscape-scale factors can influence the predator communities of agricultural pests, but the relative importance and interactions between these scales are poorly understood. Focusing on spiders, an important taxon for providing biological control, we tested the influence of field- and landscape-scale factors on structuring the spider communities in a highly dynamic brassica agroecosystem. We found that local factors (pesticide-use and crop type) and forested landscape significantly influenced the abundance and species richness of spiders, whilst grassland patches significantly affected the spider species richness. Correlation results demonstrated that assemblage patterns of most spider families positively responded to the interplay between local factors and forest patches in the landscape. The spiders abundance was greatest in cauliflower crops surrounded with forest and grassland patches in landscape. Similarly, ordination analyses revealed that organic fields of cauliflower in forested landscapes had a strong positive association with the abundance and species richness of spiders. In contrast, insecticide and synthetic fertilizer-treated fields of Chinese cabbage in landscapes with little non-crop habitat reduced the abundance and species richness of spiders. Our results highlight the extent of interaction between local- and landscape-scale factors, help explain recently reported inconsistent effects of landscape factors on conservation biological control.
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13
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Mezőfi L, Markó G, Nagy C, Korányi D, Markó V. Beyond polyphagy and opportunism: natural prey of hunting spiders in the canopy of apple trees. PeerJ 2020; 8:e9334. [PMID: 32596048 PMCID: PMC7307562 DOI: 10.7717/peerj.9334] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Accepted: 05/19/2020] [Indexed: 11/24/2022] Open
Abstract
Spiders (Araneae) form abundant and diverse assemblages in agroecosystems such as fruit orchards, and thus might have an important role as natural enemies of orchard pests. Although spiders are polyphagous and opportunistic predators in general, limited information exists on their natural prey at both species and community levels. Thus, the aim of this study was to assess the natural prey (realized trophic niche) of arboreal hunting spiders, their role in trophic webs and their biological control potential with direct observation of predation events in apple orchards. Hunting spiders with prey in their chelicerae were collected in the canopy of apple trees in organic apple orchards in Hungary during the growing seasons between 2013 and 2019 and both spiders and their prey were identified and measured. Among others, the composition of the actual (captured by spiders) and the potential (available in the canopy) prey was compared, trophic niche and food web metrics were calculated, and some morphological, dimensional data of the spider-prey pairs were analyzed. Species-specific differences in prey composition or pest control ability were also discussed. By analyzing a total of 878 prey items captured by spiders, we concluded that arboreal hunting spiders forage selectively and consume a large number of apple pests; however, spiders’ beneficial effects are greatly reduced by their high levels of intraguild predation and by a propensity to switch from pests to alternative prey. In this study, arboreal hunting spiders showed negative selectivity for pests, no selectivity for natural enemies and positive selectivity for neutral species. In the trophic web, the dominant hunting spider taxa/groups (Carrhotus xanthogramma, Philodromus cespitum, Clubiona spp., Ebrechtella tricuspidata, Xysticus spp. and ‘Other salticids’) exhibit different levels of predation on different prey groups and the trophic web’s structure changes depending on the time of year. Hunting spiders show a high functional redundancy in their predation, but contrary to their polyphagous nature, the examined spider taxa showed differences in their natural diet, exhibited a certain degree of prey specialization and selected prey by size and taxonomic identity. Guilds (such as stalkers, ambushers and foliage runners) did not consistently predict either prey composition or predation selectivity of arboreal hunting spider species. From the economic standpoint, Ph. cespitum and Clubiona spp. were found to be the most effective natural enemies of apple pests, especially of aphids. Finally, the trophic niche width of C. xanthogramma and Ph. cespitum increased during ontogeny, resulting in a shift in their predation. These results demonstrate how specific generalist predators can differ from each other in aspects of their predation ecology even within a relatively narrow taxonomic group.
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Affiliation(s)
- László Mezőfi
- Department of Entomology, Szent István University, Budapest, Hungary
| | - Gábor Markó
- Department of Plant Pathology, Szent István University, Budapest, Hungary.,Behavioural Ecology Group, Department of Systematic Zoology and Ecology, Eötvös Loránd University, Budapest, Hungary
| | - Csaba Nagy
- Research Institute for Fruitgrowing and Ornamentals, National Agricultural Research and Innovation Centre, Újfehértó, Hungary
| | - Dávid Korányi
- Institute of Ecology and Botany, "Lendület" Landscape and Conservation Ecology, Centre for Ecological Research, Vácrátót, Hungary.,GINOP Sustainable Ecosystems Group, Centre for Ecological Research, Tihany, Hungary
| | - Viktor Markó
- Department of Entomology, Szent István University, Budapest, Hungary
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14
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Laino A, Garcia CF. Study of the effect of cypermethrin on the spider Polybetes phytagoricus in different energy states. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2020; 165:104559. [PMID: 32359558 DOI: 10.1016/j.pestbp.2020.104559] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Revised: 02/27/2020] [Accepted: 02/28/2020] [Indexed: 06/11/2023]
Abstract
Spiders are found among the most important predators of plague insects of numerous agricultural systems. They are the most numerous representatives of the Class Arachnid and are widely distributed in numerous ecosystems. Due to multiple variables, living beings are exposed to quantitative transitions of their energetic reserves, which affect their sensitivity before the different xenobiotics. In the present study we evaluate the effect of cypermethrin (pyrethroid) on different metabolic/energetic stages of the spider Polybetes pythagoricus (Sparassidae). We firstly studied LD50 of cypermethrin on young, males and, pre-vitellogenic and post-vitellogenic females. The activity of superoxide dismutase (SOD), catalase (CAT), glutathione reductase (GR), glutathione-S-transferase (GST) and acetylcholinesterase (AChE) was analyzed. Results indicate that young have a higher caloric content compared to adults, females have a higher caloric content than males and vitellogenesis generates a great calory decrease in females. The LD50 was significantly lower in young (10%) (103 ng/g weight) in relation to the three models of adults (969-1108 ng/g weight). Vitellogenesis causes an increase of free radicals as a result of the different metabolic processes which manifest as an increase in the lipid peroxidation. Doses at the LD30 and LD40 levels of cypermethrin did not generate alterations in any of the enzymes analyzed in young, this fact may probably provoke an increase of lipid peroxidation (evaluated as a great MDA increase). The activity of the enzymes linked to oxidative stress was altered by this doses in the three adult models, the enzymatic activity CAT, GR, and GST was sex-dependent. Post-vitellogenic females showed a greater activity of CAT, SOD, GST and GR before the xenobiotics than pre-vitellogenic ones, probably as a consequence of metabolic stress generated during vitellogenesis.
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Affiliation(s)
- A Laino
- Instituto de Investigaciones Bioquímicas de La Plata "Profesor Doctor Rodolfo R. Brenner", 60 y 120 s/n, La Plata, Buenos Aires, Argentina
| | - C F Garcia
- Instituto de Investigaciones Bioquímicas de La Plata "Profesor Doctor Rodolfo R. Brenner", 60 y 120 s/n, La Plata, Buenos Aires, Argentina.
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15
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Řezáč M, Řezáčová V, Heneberg P. Neonicotinoid insecticides limit the potential of spiders to re-colonize disturbed agroecosystems when using silk-mediated dispersal. Sci Rep 2019; 9:12272. [PMID: 31439878 PMCID: PMC6706445 DOI: 10.1038/s41598-019-48729-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Accepted: 07/31/2019] [Indexed: 01/03/2023] Open
Abstract
Agroecosystems are subject to regular disturbances that cause extinction or migration of much of their fauna, followed by recolonization from surrounding refuges. In small-sized aeronaut spiders, such recolonization is potentiated by their ability to rappel and balloon. These are complex behaviors that we hypothesized to be affected by neurotoxins, namely, neonicotinoids. We tested this hypothesis using two common farmland spider species, Oedothorax apicatus (Linyphiidae) and Phylloneta impressa (Theridiidae). The spiders were topically exposed by dorsal wet application or tarsal dry exposure to commercial neonicotinoid formulations Actara 25 WG, Biscaya 240 OD, Mospilan 20 SP and Confidor 200 OD at concentrations that are recommended for application in agriculture. Contact exposure to neonicotinoids suppressed the ability of spiders to produce the major ampullate fiber and anchor it to the substratum by piriform fibrils. Contact exposure to neonicotinoids also suppressed the ballooning behavior that was manifested by climbing to elevated places, adopting a tiptoe position and producing silk gossamer in the wind. Impaired ability of affected common farmland spiders to quickly recolonize disturbed agroecosystems by silk-mediated dispersal may explain their decline in multiple farmland ecosystems, in which neonicotinoids are applied.
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Affiliation(s)
- Milan Řezáč
- Biodiversity Lab, Crop Research Institute, Drnovská 507, Prague, CZ-16106, Czechia
| | - Veronika Řezáčová
- Czech Academy of Sciences, Institute of Microbiology, Vídeňská 1083, Prague, CZ-142 20, Czechia
| | - Petr Heneberg
- Biodiversity Lab, Crop Research Institute, Drnovská 507, Prague, CZ-16106, Czechia. .,Charles University, Third Faculty of Medicine, Ruská 87, Prague, CZ-100 00, Czechia.
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16
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Niedobová J, Skalský M, Ouředníčková J, Michalko R, Bartošková A. Synergistic effects of glyphosate formulation herbicide and tank-mixing adjuvants on Pardosa spiders. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 249:338-344. [PMID: 30903833 DOI: 10.1016/j.envpol.2019.03.031] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Revised: 03/04/2019] [Accepted: 03/09/2019] [Indexed: 05/24/2023]
Abstract
Glyphosate-based herbicides are the world's most consumed agrochemicals, and they are commonly used in various agroecosystems, including forests, as well as in urban zones and gardens. These herbicides are sold as formulations containing adjuvants. Other tank-mixing adjuvants (most often surfactants) are commonly added to these formulations prior to application. According to the manufacturers of agrochemicals, such tank mixes (as these are known in agronomic and horticultural practice) have modified properties and perform better than do the herbicides as used alone. The effects of these tank mixes on the environment and on beneficial arthropods are almost unknown. Therefore, we studied whether a herbicide formulation mixed with adjuvant has modified effects on one of the most common genera of ground-dwelling wolf spiders vis-à-vis the herbicide formulation and adjuvants themselves. Specifically, we studied the synergistic effect in the laboratory on the predatory activity (represented by the number of killed flies) of wolf spiders in the genus Pardosa after direct treatment using the glyphosate-based herbicide formulation Roundup klasik Pro®, Roundup klasik Pro® in a mixture with the surfactant Wetcit®, Roundup klasik Pro® in a mixture with the surfactant Agrovital®, and the surfactants alone. We found that pure surfactants as well as herbicide-and-surfactants tank mixes significantly decrease the predatory activity of Pardosa spiders in the short term even as Roundup klasik Pro® did not itself have any such effect. Our results support the hypothesis that plant protection tank mixes may have modified effect on beneficial arthropods as compared to herbicide formulations alone. Therefore, testing of pesticide tank mixes is highly important, because it is these tank mixes that are actually applied to the environment.
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Affiliation(s)
- Jana Niedobová
- Department of Zoology, Fisheries, Hydrobiology and Apiculture, Faculty of AgriSciences, Mendel University in Brno, Zemědělská 1, 613 00, Brno, Czech Republic.
| | - Michal Skalský
- Research and Breeding Institute of Pomology Holovousy Ltd., Holovousy 129, 508 01, Hořice, Czech Republic
| | - Jana Ouředníčková
- Research and Breeding Institute of Pomology Holovousy Ltd., Holovousy 129, 508 01, Hořice, Czech Republic
| | - Radek Michalko
- Department of Forest Ecology, Faculty of Forestry and Wood Technology, Mendel University in Brno, Brno, Czech Republic
| | - Adéla Bartošková
- Department of Zoology, Fisheries, Hydrobiology and Apiculture, Faculty of AgriSciences, Mendel University in Brno, Zemědělská 1, 613 00, Brno, Czech Republic
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17
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Michalko R, Pekár S, Entling MH. An updated perspective on spiders as generalist predators in biological control. Oecologia 2018; 189:21-36. [PMID: 30535723 DOI: 10.1007/s00442-018-4313-1] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Accepted: 11/21/2018] [Indexed: 10/27/2022]
Abstract
The role of generalist predators in biological control remains controversial as they may not only reduce pest populations but also disrupt biocontrol exerted by other natural enemies. Here, we focus on spiders as a model group of generalist predators. They are among the most abundant and most diverse natural enemies in agroecosystems. We review their functional traits that influence food-web dynamics and pest suppression at organisational levels ranging from individuals to communities. At the individual and population levels, we focus on hunting strategy, body size, life stage, nutritional target, and personality (i.e., consistent inter-individual differences in behaviour). These functional traits determine the spider trophic niches. We also focus on the functional and numerical response to pest densities and on non-consumptive effects of spiders on pests. At the community level, we review multiple-predator effects and effect of alternative prey on pest suppression. Evidence for a key role of spiders in pest suppression is accumulating. Importantly, recent research has highlighted widespread non-consumptive effects and complex intraguild interactions of spiders. A better understanding of these effects is needed to optimize biocontrol services by spiders in agroecosystems.
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Affiliation(s)
- Radek Michalko
- Department of Forest Ecology, Faculty of Forestry and Wood Technology, Mendel University in Brno, Zemědělská 3, 613 00, Brno, Czech Republic.
| | - Stano Pekár
- Department of Botany and Zoology, Faculty of Science, Masaryk University, Kotlářská 2, 611 37, Brno, Czech Republic
| | - Martin H Entling
- Institute for Environmental Sciences, University of Koblenz-Landau, Fortstrasse 7, 76829, Landau/Pfalz, Germany
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18
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Mass spring recolonization of agroecosystems by the spider Oedothorax apicatus (Linyphiidae: Erigoninae). Biologia (Bratisl) 2018. [DOI: 10.2478/s11756-018-0159-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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19
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Staudacher K, Rennstam Rubbmark O, Birkhofer K, Malsher G, Sint D, Jonsson M, Traugott M. Habitat heterogeneity induces rapid changes in the feeding behaviour of generalist arthropod predators. Funct Ecol 2018; 32:809-819. [PMID: 29657351 PMCID: PMC5887929 DOI: 10.1111/1365-2435.13028] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Accepted: 11/29/2017] [Indexed: 11/29/2022]
Abstract
The "habitat heterogeneity hypothesis" predicts positive effects of structural complexity on species coexistence. Increasing habitat heterogeneity can change the diversity (number of species, abundances) and the functional roles of communities. The latter, however, is not well understood as species and individuals may respond very differently and dynamically to a changing environment.Here, we experimentally test how habitat heterogeneity affects generalist arthropod predators, including epigaeic spiders, carabid and staphylinid beetles, under natural conditions by assessing their diversity and directly measuring their trophic interactions (which provide a proxy for their functional roles). The experiment was conducted in spring barley fields in Southern Sweden where habitat heterogeneity was manipulated by increasing within-field plant diversity.Increased habitat heterogeneity triggered rapid changes in the feeding behaviour of generalist predators characterized by lower trophic specialization at both network (H2', degree of interaction specialization in the entire network) and species level (d', degree of interaction specialization at the species level). We presume that this is because spatial separation resulted in relaxed competition and allowed an increased overlap in resources used among predator species. Predators collected from heterogenous habitats also showed greater individual-level dietary variability which might be ascribed to relaxed intraspecific competition.Our results provide conclusive evidence that habitat heterogeneity can induce rapid behavioural responses independent of changes in diversity, potentially promoting the stability of ecosystem functions. A plain language summary is available for this article.
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Affiliation(s)
- Karin Staudacher
- Mountain Agriculture Research UnitInstitute of Ecology University of Innsbruck Innsbruck Austria
| | - Oskar Rennstam Rubbmark
- Mountain Agriculture Research UnitInstitute of Ecology University of Innsbruck Innsbruck Austria
| | - Klaus Birkhofer
- Department of Biology Lund University Lund Sweden.,Chair of Ecology Brandenburg University of Technology Cottbus Germany
| | - Gerard Malsher
- Department of Ecology Swedish University of Agricultural Sciences Uppsala Sweden
| | - Daniela Sint
- Mountain Agriculture Research UnitInstitute of Ecology University of Innsbruck Innsbruck Austria
| | - Mattias Jonsson
- Department of Ecology Swedish University of Agricultural Sciences Uppsala Sweden
| | - Michael Traugott
- Mountain Agriculture Research UnitInstitute of Ecology University of Innsbruck Innsbruck Austria
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20
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Saqib HSA, You M, Gurr GM. Multivariate ordination identifies vegetation types associated with spider conservation in brassica crops. PeerJ 2017; 5:e3795. [PMID: 29085741 PMCID: PMC5661431 DOI: 10.7717/peerj.3795] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Accepted: 08/18/2017] [Indexed: 11/24/2022] Open
Abstract
Conservation biological control emphasizes natural and other non-crop vegetation as a source of natural enemies to focal crops. There is an unmet need for better methods to identify the types of vegetation that are optimal to support specific natural enemies that may colonize the crops. Here we explore the commonality of the spider assemblage—considering abundance and diversity (H)—in brassica crops with that of adjacent non-crop and non-brassica crop vegetation. We employ spatial-based multivariate ordination approaches, hierarchical clustering and spatial eigenvector analysis. The small-scale mixed cropping and high disturbance frequency of southern Chinese vegetation farming offered a setting to test the role of alternate vegetation for spider conservation. Our findings indicate that spider families differ markedly in occurrence with respect to vegetation type. Grassy field margins, non-crop vegetation, taro and sweetpotato harbour spider morphospecies and functional groups that are also present in brassica crops. In contrast, pumpkin and litchi contain spiders not found in brassicas, and so may have little benefit for conservation biological control services for brassicas. Our findings also illustrate the utility of advanced statistical approaches for identifying spatial relationships between natural enemies and the land uses most likely to offer alternative habitats for conservation biological control efforts that generates testable hypotheses for future studies.
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Affiliation(s)
- Hafiz Sohaib Ahmed Saqib
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Fujian Agriculture and Forestry University, Fuzhou, China.,Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Minsheng You
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Fujian Agriculture and Forestry University, Fuzhou, China.,Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou, China.,Fujian-Taiwan Joint Centre for Ecological Control of Crop Pests, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China
| | - Geoff M Gurr
- State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Fujian Agriculture and Forestry University, Fuzhou, China.,Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou, China.,Fujian-Taiwan Joint Centre for Ecological Control of Crop Pests, Fujian Agriculture and Forestry University, Fuzhou, Fujian, China.,Graham Centre for Agricultural Innovation, Charles Sturt University, Orange, New South Wales, Australia
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21
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Singh A, Weisser WW, Hanna R, Houmgny R, Zytynska SE. Reduce pests, enhance production: benefits of intercropping at high densities for okra farmers in Cameroon. PEST MANAGEMENT SCIENCE 2017; 73:2017-2027. [PMID: 28585376 DOI: 10.1002/ps.4636] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Revised: 05/25/2017] [Accepted: 05/29/2017] [Indexed: 05/08/2023]
Abstract
BACKGROUND Intercropping 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. RESULTS We 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. CONCLUSIONS We 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.
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Affiliation(s)
- Akanksha Singh
- Terrestrial Ecology Research Group, Department for Ecology and Ecosystem Management, Technische Universität München, Freising, Germany
- International Institute for Tropical Agriculture (IITA), Yaoundé, Cameroon
| | - Wolfgang W Weisser
- Terrestrial Ecology Research Group, Department for Ecology and Ecosystem Management, Technische Universität München, Freising, Germany
| | - Rachid Hanna
- International Institute for Tropical Agriculture (IITA), Yaoundé, Cameroon
| | - Raissa Houmgny
- International Institute for Tropical Agriculture (IITA), Yaoundé, Cameroon
| | - Sharon E Zytynska
- Terrestrial Ecology Research Group, Department for Ecology and Ecosystem Management, Technische Universität München, Freising, Germany
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22
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Nyffeler M, Birkhofer K. An estimated 400-800 million tons of prey are annually killed by the global spider community. THE SCIENCE OF NATURE - NATURWISSENSCHAFTEN 2017; 104:30. [PMID: 28289774 PMCID: PMC5348567 DOI: 10.1007/s00114-017-1440-1] [Citation(s) in RCA: 116] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Revised: 01/31/2017] [Accepted: 02/02/2017] [Indexed: 11/22/2022]
Abstract
Spiders have been suspected to be one of the most important groups of natural enemies of insects worldwide. To document the impact of the global spider community as insect predators, we present estimates of the biomass of annually killed insect prey. Our estimates assessed with two different methods suggest that the annual prey kill of the global spider community is in the range of 400-800 million metric tons (fresh weight), with insects and collembolans composing >90% of the captured prey. This equals approximately 1‰ of the global terrestrial net primary production. Spiders associated with forests and grasslands account for >95% of the annual prey kill of the global spider community, whereas spiders in other habitats are rather insignificant contributors over a full year. The spider communities associated with annual crops contribute less than 2% to the global annual prey kill. This, however, can be partly explained by the fact that annual crop fields are "disturbed habitats" with a low buildup of spider biomass and that agrobiont spiders often only kill prey over short time periods in a year. Our estimates are supported by the published results of exclusion experiments, showing that the number of herbivorous/detritivorous insects and collembolans increased significantly after spider removal from experimental plots. The presented estimates of the global annual prey kill and the relative contribution of spider predation in different biomes improve the general understanding of spider ecology and provide a first assessment of the global impact of this very important predator group.
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Affiliation(s)
- Martin Nyffeler
- Section of Conservation Biology, Department of Environmental Sciences, University of Basel, CH-4056, Basel, Switzerland.
| | - Klaus Birkhofer
- Department of Biology, Lund University, SE-223 62, Lund, Sweden
- Chair of Ecology, Brandenburg University of Technology Cottbus-Senftenberg, 03046, Cottbus, Germany
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Birkhofer K, Bylund H, Dalin P, Ferlian O, Gagic V, Hambäck PA, Klapwijk M, Mestre L, Roubinet E, Schroeder M, Stenberg JA, Porcel M, Björkman C, Jonsson M. Methods to identify the prey of invertebrate predators in terrestrial field studies. Ecol Evol 2017; 7:1942-1953. [PMID: 28331601 PMCID: PMC5355183 DOI: 10.1002/ece3.2791] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Revised: 12/29/2016] [Accepted: 01/14/2017] [Indexed: 11/13/2022] Open
Abstract
Predation is an interaction during which an organism kills and feeds on another organism. Past and current interest in studying predation in terrestrial habitats has yielded a number of methods to assess invertebrate predation events in terrestrial ecosystems. We provide a decision tree to select appropriate methods for individual studies. For each method, we then present a short introduction, key examples for applications, advantages and disadvantages, and an outlook to future refinements. Video and, to a lesser extent, live observations are recommended in studies that address behavioral aspects of predator–prey interactions or focus on per capita predation rates. Cage studies are only appropriate for small predator species, but often suffer from a bias via cage effects. The use of prey baits or analyses of prey remains are cheaper than other methods and have the potential to provide per capita predation estimates. These advantages often come at the cost of low taxonomic specificity. Molecular methods provide reliable estimates at a fine level of taxonomic resolution and are free of observer bias for predator species of any size. However, the current PCR‐based methods lack the ability to estimate predation rates for individual predators and are more expensive than other methods. Molecular and stable isotope analyses are best suited to address systems that include a range of predator and prey species. Our review of methods strongly suggests that while in many cases individual methods are sufficient to study specific questions, combinations of methods hold a high potential to provide more holistic insights into predation events. This review presents an overview of methods to researchers that are new to the field or to particular aspects of predation ecology and provides recommendations toward the subset of suitable methods to identify the prey of invertebrate predators in terrestrial field research.
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Affiliation(s)
- Klaus Birkhofer
- Department of Biology, Biodiversity and Conservation Science Lund University Lund Sweden; Chair of Ecology Brandenburg University of Technology Cottbus-Senftenberg Germany
| | - Helena Bylund
- Department of Ecology Swedish University of Agricultural Sciences Uppsala Sweden
| | - Peter Dalin
- Department of Ecology Swedish University of Agricultural Sciences Uppsala Sweden
| | - Olga Ferlian
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig Leipzig Germany; Institute of Biology Leipzig University Leipzig Germany
| | - Vesna Gagic
- Department of Ecology Swedish University of Agricultural Sciences Uppsala Sweden; CSIRO Brisbane QLD Australia
| | - Peter A Hambäck
- Department of Ecology, Environment and Plant Sciences Stockholm University Stockholm Sweden
| | - Maartje Klapwijk
- Department of Ecology Swedish University of Agricultural Sciences Uppsala Sweden
| | - Laia Mestre
- Department of Ecology Swedish University of Agricultural Sciences Uppsala Sweden; Ecosystem Analysis Institute for Environmental Sciences University of Koblenz-Landau Landau Germany
| | - Eve Roubinet
- Department of Ecology Swedish University of Agricultural Sciences Uppsala Sweden
| | - Martin Schroeder
- Department of Ecology Swedish University of Agricultural Sciences Uppsala Sweden
| | - Johan A Stenberg
- Department of Plant Protection Biology Swedish University of Agricultural Sciences Alnarp Sweden
| | - Mario Porcel
- Department of Plant Protection Biology Swedish University of Agricultural Sciences Alnarp Sweden
| | - Christer Björkman
- Department of Ecology Swedish University of Agricultural Sciences Uppsala Sweden
| | - Mattias Jonsson
- Department of Ecology Swedish University of Agricultural Sciences Uppsala Sweden
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Niedobová J, Hula V, Michalko R. Sublethal effect of agronomical surfactants on the spider Pardosa agrestis. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2016; 213:84-89. [PMID: 26878602 DOI: 10.1016/j.envpol.2016.02.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Revised: 01/29/2016] [Accepted: 02/01/2016] [Indexed: 06/05/2023]
Abstract
In addition to their active ingredients, pesticides contain also additives - surfactants. Use of surfactants has been increasing over the past decade, but their effects on non-target organisms, especially natural enemies of pests, have been studied only very rarely. The effect of three common agrochemical surfactants on the foraging behavior of the wolf spider Pardosa agrestis was studied in the laboratory. Differences in short-term, long-term, and overall cumulative predatory activities were investigated. We found that surfactant treatment significantly affected short-term predatory activity but had no effect on long-term predatory activity. The surfactants also significantly influenced the cumulative number of killed prey. We also found the sex-specific increase in cumulative kills after surfactants treatment. This is the first study showing that pesticide additives have a sublethal effect that can weaken the predatory activity of a potential biological control agent. More studies on the effects of surfactants are needed to understand how they affect beneficial organisms in agroecosystems.
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Affiliation(s)
- Jana Niedobová
- Department of Zoology, Fisheries, Hydrobiology and Apiculture, Faculty of Agronomy, Mendel University in Brno, Zemědělská 1, 613 00, Brno, Czech Republic.
| | - Vladimír Hula
- Department of Zoology, Fisheries, Hydrobiology and Apiculture, Faculty of Agronomy, Mendel University in Brno, Zemědělská 1, 613 00, Brno, Czech Republic
| | - Radek Michalko
- Department of Forest Ecology, Faculty of Forestry and Wood Technology, Mendel University in Brno, Zemědělská 1, 613 00, Brno, Czech Republic; Department of Botany and Zoology, Faculty of Science, Masaryk University, Brno, Kotlářská 2, 611 37, Brno, Czech Republic
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Mestre L, Piñol J, Barrientos JA, Espadaler X. Differential ant exclusion from canopies shows contrasting top-down effects on community structure. Oecologia 2015; 180:193-203. [PMID: 26376660 DOI: 10.1007/s00442-015-3442-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Accepted: 08/30/2015] [Indexed: 10/23/2022]
Abstract
Predators have far-reaching effects on communities by triggering top-down trophic cascades that influence ecosystem functioning. Omnivory and intraguild interactions between predators give rise to reticulate food webs and may either strengthen or dampen trophic cascades depending on context. Disentangling the effects of multiple predator species is therefore crucial for predicting the influence of predators on community structure. We focused on ants as dominant generalist predators in arthropod communities and set up a differential ant exclusion from canopies to examine its effects on assemblage species composition and densities of five arthropod groups (psocopterans, aphids, spiders, heteropterans and beetles). We coupled a glue band with tubes allowing only the ant Lasius grandis to reach the canopies to isolate its effect from the rest of crawling predators (ants, earwigs) and compared it against a full exclusion and a control. L. grandis alone had widespread effects on assemblage species composition, with contrasting species-specific responses within groups, where some species affected by L. grandis presence were not further affected by the presence of the whole crawling predator assemblage, and vice versa. Overall, L. grandis caused two- to threefold decreases of generalist predators and a threefold increase of aphids. However, it lacked further top-down effects on primary consumers, which only emerged when all crawling predators were present. This differential exclusion demonstrates the distinctive and widespread intraguild effects on community structure of a single ant species that contrast with the top-down effects exerted by the whole crawling predator assemblage.
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Affiliation(s)
- Laia Mestre
- Universitat Autònoma Barcelona, 08193, Cerdanyola Del Vallès, Spain. .,CREAF, 08193, Cerdanyola Del Vallès, Spain. .,Department of Ecology, Swedish University of Agricultural Sciences, Box 7044, 750 07, Uppsala, Sweden.
| | - J Piñol
- Universitat Autònoma Barcelona, 08193, Cerdanyola Del Vallès, Spain.,CREAF, 08193, Cerdanyola Del Vallès, Spain
| | - J A Barrientos
- Universitat Autònoma Barcelona, 08193, Cerdanyola Del Vallès, Spain
| | - X Espadaler
- Universitat Autònoma Barcelona, 08193, Cerdanyola Del Vallès, Spain.,CREAF, 08193, Cerdanyola Del Vallès, Spain
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Košulič O, Vichitbandha P. Representatives of Spider Families (Arachnida: Araneae) in Experimental Plots of Physic Nut Plantations (Jatropha curcas L.) in Kampaeng Saen Campus of Kasetsart University, Thailand. ACTA UNIVERSITATIS AGRICULTURAE ET SILVICULTURAE MENDELIANAE BRUNENSIS 2015. [DOI: 10.11118/actaun201563020425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Pekár S, Michalko R, Loverre P, Líznarová E, Černecká Ľ. Biological control in winter: novel evidence for the importance of generalist predators. J Appl Ecol 2014. [DOI: 10.1111/1365-2664.12363] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Stano Pekár
- Department of Botany and Zoology; Faculty of Sciences; Masaryk University; Kotlářská 2 Brno 611 37 Czech Republic
| | - Radek Michalko
- Department of Botany and Zoology; Faculty of Sciences; Masaryk University; Kotlářská 2 Brno 611 37 Czech Republic
| | - Pamela Loverre
- Department of Botany and Zoology; Faculty of Sciences; Masaryk University; Kotlářská 2 Brno 611 37 Czech Republic
| | - Eva Líznarová
- Department of Botany and Zoology; Faculty of Sciences; Masaryk University; Kotlářská 2 Brno 611 37 Czech Republic
| | - Ľudmila Černecká
- Institute of Forest Ecology; Slovak Academy of Sciences; Štúrova 2 Zvolen 96053 Slovakia
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Boreau de Roincé C, Lavigne C, Mandrin JF, Rollard C, Symondson WOC. Early-season predation on aphids by winter-active spiders in apple orchards revealed by diagnostic PCR. BULLETIN OF ENTOMOLOGICAL RESEARCH 2013; 103:148-154. [PMID: 23122297 DOI: 10.1017/s0007485312000636] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Aphids are major pests in apple orchards, debilitating the crop and spreading disease. We investigated whether early-season predation by canopy spiders may be effectively controlling aphid numbers in three organic orchards. For this purpose, we monitored the aphid population dynamics from the winter eggs to colony stages and compared this to spider abundances and rates of predation on aphids detected by diagnostic polymerase chain reaction. For the latter, we applied existing general aphid primers. We found that spiders ate colony fundatrices and that aphid numbers were negatively related to spider abundance. Spiders were the main active predators within the orchards when the first colony fundatrices were present, indicating their importance in the early control of aphid populations.
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Affiliation(s)
- C Boreau de Roincé
- Centre Technique Interprofessionnel des Fruits et Légumes, Centre de Balandran, Bellegarde, France
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Kerzicnik LM, Peairs FB, Cushing PE, Draney ML, Merrill SC. Spider fauna of semiarid eastern Colorado agroecosystems: diversity, abundance, and effects of crop intensification. ENVIRONMENTAL ENTOMOLOGY 2013; 42:131-142. [PMID: 23339794 DOI: 10.1603/en12186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Spiders are critical predators in agroecosystems. Crop management practices can influence predator density and diversity, which, in turn, can influence pest management strategies. Crop intensification is a sustainable agricultural technique that can enhance crop production although optimizing soil moisture. To date, there is no information on how crop intensification affects natural enemy populations, particularly spiders. This study had two objectives: to characterize the abundance and diversity of spiders in eastern Colorado agroecosystems, and to test the hypothesis that spider diversity and density would be higher in wheat (Triticum aestivum L.) in crop-intensified rotations compared with wheat in conventional rotations. We collected spiders through pitfall, vacuum, and lookdown sampling from 2002 to 2007 to test these objectives. Over 11,000 spiders in 19 families from 119 species were captured from all sampling techniques. Interestingly, the hunting spider guild represented 89% of the spider fauna captured from all sites with the families Gnaphosidae and Lycosidae representing 75% of these spiders. Compared with European agroecosystems, these agroecosystems had greater diversity, which can be beneficial for the biological control of pests. Overall, spider densities were low in these semiarid cropping systems, and crop intensification effects on spider densities were not evident at this scale.
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Affiliation(s)
- Lauren M Kerzicnik
- Bioagricultural Sciences and Pest Management, Colorado State University, Fort Collins, CO 80526, USA
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Diehl E, Sereda E, Wolters V, Birkhofer K. Effects of predator specialization, host plant and climate on biological control of aphids by natural enemies: a meta-analysis. J Appl Ecol 2013. [DOI: 10.1111/1365-2664.12032] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Eva Diehl
- Department of Animal Ecology; Justus Liebig University; Heinrich-Buff-Ring 26-32; 35392; Giessen; Germany
| | - Elvira Sereda
- Department of Animal Ecology; Justus Liebig University; Heinrich-Buff-Ring 26-32; 35392; Giessen; Germany
| | - Volkmar Wolters
- Department of Animal Ecology; Justus Liebig University; Heinrich-Buff-Ring 26-32; 35392; Giessen; Germany
| | - Klaus Birkhofer
- Department of Biology; Lund University; Biodiversity and Conservation Science; Sölvegatan 37; 22362; Lund; Sweden
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Traugott M, Kamenova S, Ruess L, Seeber J, Plantegenest M. Empirically Characterising Trophic Networks. ADV ECOL RES 2013. [DOI: 10.1016/b978-0-12-420002-9.00003-2] [Citation(s) in RCA: 116] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
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Davey JS, Vaughan IP, Andrew King R, Bell JR, Bohan DA, Bruford MW, Holland JM, Symondson WOC. Intraguild predation in winter wheat: prey choice by a common epigeal carabid consuming spiders. J Appl Ecol 2012. [DOI: 10.1111/1365-2664.12008] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jeffrey S. Davey
- Cardiff School of Biosciences; Cardiff University; Sir Martin Evans Building, Museum Avenue; Cardiff; CF10 3AX; UK
| | - Ian P. Vaughan
- Cardiff School of Biosciences; Cardiff University; Sir Martin Evans Building, Museum Avenue; Cardiff; CF10 3AX; UK
| | - R. Andrew King
- Cardiff School of Biosciences; Cardiff University; Sir Martin Evans Building, Museum Avenue; Cardiff; CF10 3AX; UK
| | | | - David A. Bohan
- Department of Plant and Invertebrate Ecology; Rothamsted Research; Harpenden; Hertfordshire; AL5 2JQ; UK
| | - Michael W. Bruford
- Cardiff School of Biosciences; Cardiff University; Sir Martin Evans Building, Museum Avenue; Cardiff; CF10 3AX; UK
| | - John M. Holland
- Game and Wildlife Conservation Trust; Fordingbridge; Hampshire; SP6 1EF; UK
| | - William O. C. Symondson
- Cardiff School of Biosciences; Cardiff University; Sir Martin Evans Building, Museum Avenue; Cardiff; CF10 3AX; UK
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Pekár S. Spiders (Araneae) in the pesticide world: an ecotoxicological review. PEST MANAGEMENT SCIENCE 2012; 68:1438-1446. [PMID: 22945871 DOI: 10.1002/ps.3397] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2012] [Revised: 07/09/2012] [Accepted: 08/06/2012] [Indexed: 06/01/2023]
Abstract
Being one of the most abundant and species-rich groups of natural enemies occurring in all agroecosystems, spiders are variably affected by pesticide applications. Here, a review is given of research on spider ecotoxicology. More than 40 species of spiders and almost 130 pesticides (acaricides, insecticides, fungicides and herbicides) have been tested so far in the field or under laboratory conditions. Field studies show that the degree of population reduction following pesticide application is a function of a number of factors inherent to pesticides, crops and spider species (guilds). These studies also revealed indirect effects via habitat and prey disruption. Among laboratory studies, a number of papers have investigated only the direct lethal effect. A meta-analysis of these data reveals that spiders are mainly affected by acaricides and insecticides, particularly neurotoxic substances. Currently, ecotoxicological research on spiders is focused more on direct sublethal effects on a variety of behavioural traits (locomotion, predation, web-building, reproduction, development) and physiology. Yet a standardised approach to the evaluation of sublethal effects is lacking. A few studies have provided some evidence for hormesis in spiders. Future research should be more concentrated on sublethal effects and the estimation of long-term changes in spider populations as a result of pesticide treatment.
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Affiliation(s)
- Stano Pekár
- Department of Botany and Zoology, Masaryk University, Brno, Czech Republic.
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Birkhofer K, Bezemer T, Hedlund K, Setälä H. Community composition of soil organisms under different wheat farming systems. MICROBIAL ECOLOGY IN SUSTAINABLE AGROECOSYSTEMS 2012. [DOI: 10.1201/b12339-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
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Yu XD, Pickett J, Ma YZ, Bruce T, Napier J, Jones HD, Xia LQ. Metabolic engineering of plant-derived (E)-β-farnesene synthase genes for a novel type of aphid-resistant genetically modified crop plants. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2012; 54:282-99. [PMID: 22348813 DOI: 10.1111/j.1744-7909.2012.01107.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Aphids are major agricultural pests that cause significant yield losses of crop plants each year. Excessive dependence on insecticides for long-term aphid control is undesirable because of the development of insecticide resistance, the potential negative effects on non-target organisms and environmental pollution. Transgenic crops engineered for resistance to aphids via a non-toxic mode of action could be an efficient alternative strategy. (E)-β-Farnesene (EβF) synthases catalyze the formation of EβF, which for many pest aphids is the main component of the alarm pheromone involved in the chemical communication within these species. EβF can also be synthesized by certain plants but is then normally contaminated with inhibitory compounds. Engineering of crop plants capable of synthesizing and emitting EβF could cause repulsion of aphids and also the attraction of natural enemies that use EβF as a foraging cue, thus minimizing aphid infestation. In this review, the effects of aphids on host plants, plants' defenses against aphid herbivory and the recruitment of natural enemies for aphid control in an agricultural setting are briefly introduced. Furthermore, the plant-derived EβF synthase genes cloned to date along with their potential roles in generating novel aphid resistance via genetically modified approaches are discussed.
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Affiliation(s)
- Xiu-Dao Yu
- Institute of Crop Sciences (ICS), Chinese Academy of Agricultural Sciences (CAAS), Beijing 100081, China
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Schmidt JM, Harwood JD, Rypstra AL. Foraging activity of a dominant epigeal predator: molecular evidence for the effect of prey density on consumption. OIKOS 2012. [DOI: 10.1111/j.1600-0706.2011.20366.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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38
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Birkhofer K, Wolters V, Diekötter T. Density-dependent and -independent effects on the joint use of space by predators and prey in terrestrial arthropod food-webs. OIKOS 2011. [DOI: 10.1111/j.1600-0706.2011.19546.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Griesinger LM, Evans SC, Rypstra AL. Effects of a glyphosate-based herbicide on mate location in a wolf spider that inhabits agroecosystems. CHEMOSPHERE 2011; 84:1461-6. [PMID: 21555143 DOI: 10.1016/j.chemosphere.2011.04.044] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2010] [Revised: 04/06/2011] [Accepted: 04/17/2011] [Indexed: 05/30/2023]
Abstract
Chemical communication is important to many arthropod species but the potential exists for anthropogenic chemicals to disrupt information flow. Although glyphosate-based herbicides are not acutely toxic to arthropods, little is known regarding their effects on natural chemical communication pathways. The wolf spider, Pardosamilvina, is abundant in agroecosystems where herbicides are regularly applied and uses air- and substrate-borne chemical signals extensively during mating. The aim of this study was to examine effects of a commercial formulation of a glyphosate-based herbicide on the ability of males to find females. In the field, virgin females, when hidden inside pitfall traps with herbicide, attracted fewer males than females with water. Likewise females in traps with a ring of herbicide surrounding the opening were less likely to attract males than those in traps surrounded by water. We explored the reaction of males to any airborne component of the herbicide in a laboratory two-choice olfactometer experiment. When no female pheromones were present, males were equally likely to select herbicide or water treated corridors and they all moved through the apparatus at similar speeds. When female pheromones were present, the males that selected control corridors moved more slowly than those that selected herbicide and, if we control for the initial decision time, more males selected the control corridors over the herbicide. These data suggest that glyphosate-based herbicides are "info-disruptors" that alter the ability of males to detect and/or react fully to female signals.
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Mallinger RE, Hogg DB, Gratton C. Methyl salicylate attracts natural enemies and reduces populations of soybean aphids (Hemiptera: Aphididae) in soybean agroecosystems. JOURNAL OF ECONOMIC ENTOMOLOGY 2011; 104:115-24. [PMID: 21404848 DOI: 10.1603/ec10253] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Methyl salicylate, an herbivore-induced plant volatile, has been shown to attract natural enemies and affect herbivore behavior. In this study, methyl salicylate was examined for its attractiveness to natural enemies of the soybean aphid, Aphis glycines Matsumura (Hemiptera: Aphididae), and for its direct effects on soybean aphid population growth rates. Methyl salicylate lures were deployed in plots within organic soybean [Glycine max (L.) Merr.] fields. Sticky card traps adjacent to and 1.5 m from the lure measured the relative abundance of natural enemies, and soybean aphid populations were monitored within treated and untreated plots. In addition, exclusion cage studies were conducted to determine methyl salicylate's effect on soybean aphid population growth rates in the absence of natural enemies. Significantly greater numbers of syrphid flies (Diptera: Syrphidae) and green lacewings (Neuroptera: Chrysopidae) were caught on traps adjacent to the methyl salicylate lure, but no differences in abundance were found at traps 1.5 m from the lure. Furthermore, abundance of soybean aphids was significantly lower in methyl salicylate-treated plots. In exclusion cage studies, soybean aphid numbers were significantly reduced on treated soybean plants when all plants were open to natural enemies. When plants were caged, however, soybean aphid numbers and population growth rates did not differ between treated and untreated plants suggesting no effect of methyl salicylate on soybean aphid reproduction and implicating the role of natural enemies in depressing aphid populations. Although aphid populations were reduced locally around methyl salicylate lures, larger scale studies are needed to assess the technology at the whole-field scale.
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Affiliation(s)
- Rachel E Mallinger
- Department of Entomology, University of Wisconsin-Madison, 1630 Linden Street, Madison, WI 53703, USA.
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