Relevant bibliographies by topics / Pollinators in the agroecosystems

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
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Academic literature on the topic 'Pollinators in the agroecosystems'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Pollinators in the agroecosystems"

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Morrison, Jane, Jordi Izquierdo, Eva Hernández Plaza, and José L. González-Andújar. "The Attractiveness of Five Common Mediterranean Weeds to Pollinators." Agronomy 11, no. 7 (June 28, 2021): 1314. http://dx.doi.org/10.3390/agronomy11071314.

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Concerns about a global decline in pollinators have called for more knowledge about the factors influencing wild pollinator abundance and diversity in agroecosystems. Agricultural intensification has been identified as the main cause of this “global pollinator crisis”, particularly due to reductions in natural areas holding critical floral and nesting resources. Maintaining native wild plants in agricultural landscapes (e.g., in field margins) is often recommended as a cost-effective and efficient method for pollinator conservation. In this study, the role of common wild flowers, often considered weeds, in supporting pollinators in a Mediterranean agroecosystem was investigated. This work involved a two-year field trial to compare five native weed species common in Mediterranean cereal agroecosystems: Convolvulus arvensis L., Daucus carota L., Malva sylvestris L., Papaver rhoeas L., and Sonchus oleraceus L. The goal was to compare the attractiveness of these species, and a mixture of all five, to different flower-visiting insect groups in order to assess their value in supporting wild pollinators. Overall, D. carota had the highest number of insect visits, followed by P. rhoeas. C. arvensis, M. sylvestris, and S. oleraceus, which had lower numbers of visits. On the basis of their overall attractiveness to pollinators and low risk for invasiveness, D. carota, P. rhoeas, and M. sylvestris are the most likely to contribute positively to the conservation of pollinators in agroecosystems. Our results also suggest that it is advantageous for wild flowers sown for the purpose of pollinator conservation to be grown in clumps, rather than highly intermingled, for improved visitation rates.
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Giovanetti, Manuela, Sergio Albertazzi, Simone Flaminio, Rosa Ranalli, Laura Bortolotti, and Marino Quaranta. "Pollination in Agroecosystems: A Review of the Conceptual Framework with a View to Sound Monitoring." Land 10, no. 5 (May 19, 2021): 540. http://dx.doi.org/10.3390/land10050540.

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The pollination ecology in agroecosystems tackles a landscape in which plants and pollinators need to adjust, or be adjusted, to human intervention. A valid, widely applied approach is to regard pollination as a link between specific plants and their pollinators. However, recent evidence has added landscape features for a wider ecological perspective. Are we going in the right direction? Are existing methods providing pollinator monitoring tools suitable for understanding agroecosystems? In Italy, we needed to address these questions to respond to government pressure to implement pollinator monitoring in agroecosystems. We therefore surveyed the literature, grouped methods and findings, and evaluated approaches. We selected studies that may contain directions and tools directly linked to pollinators and agroecosystems. Our analysis revealed four main paths that must come together at some point: (i) the research question perspective, (ii) the advances of landscape analysis, (iii) the role of vegetation, and (iv) the gaps in our knowledge of pollinators taxonomy and behavior. An important conclusion is that the pollinator scale is alarmingly disregarded. Debate continues about what features to include in pollinator monitoring and the appropriate level of detail: we suggest that the pollinator scale should be the main driver.
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Middleton, Eric G., Ian V. MacRae, and Christopher R. Philips. "Floral Plantings in Large-Scale Commercial Agroecosystems Support Both Pollinators and Arthropod Predators." Insects 12, no. 2 (January 21, 2021): 91. http://dx.doi.org/10.3390/insects12020091.

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Beneficial insect populations and the services that they provide are in decline, largely due to agricultural land use and practices. Establishing perennial floral plantings in the unused margins of crop fields can help conserve beneficial pollinators and predators in commercial agroecosystems. We assessed the impacts of floral plantings on both pollinators and arthropod predators when established adjacent to conventionally managed commercial potato fields. Floral plantings significantly increased the abundance of pollinators within floral margins compared with unmanaged margins. Increased floral cover within margins led to significantly greater pollinator abundance as well. The overall abundance of arthropod predators was also significantly increased in floral plantings, although it was unrelated to the amount of floral cover. Within adjacent potato crops, the presence of floral plantings in field margins had no effect on the abundance of pollinators or predators, although higher floral cover in margins did marginally increase in-crop pollinator abundance. Establishing floral plantings of this kind on a large scale in commercial agroecosystems can help conserve both pollinators and predators, but may not increase ecosystem services in nearby crops.
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McGrady, C. M., R. Troyer, and S. J. Fleischer. "Wild Bee Visitation Rates Exceed Pollination Thresholds in Commercial Cucurbita Agroecosystems." Journal of Economic Entomology 113, no. 2 (December 9, 2019): 562–74. http://dx.doi.org/10.1093/jee/toz295.

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Abstract Wild bees supply sufficient pollination in Cucurbita agroecosystems in certain settings; however, some growers continue to stock fields with managed pollinators due to uncertainties of temporal and spatial variation on pollination services supplied by wild bees. Here, we evaluate wild bee pollination activity in wholesale, commercial pumpkin fields over 3 yr. We identified 37 species of bees foraging in commercial pumpkin fields. Honey bees (Apis mellifera L. [Hymenoptera: Apidae]), squash bees (Eucera (Peponapis) Say, Dorchin [Hymenoptera: Apidae]), and bumble bees (Bombus spp., primarily B. impatiens Cresson [Hymenoptera: Apidae]) were the most active pollinator taxa, responsible for over 95% of all pollination visits. Preference for female flowers decreased as distance from field edge increased for several bee taxa. Visitation rates from one key pollinator was negatively affected by field size. Visitation rates for multiple taxa exhibited a curvilinear response as the growing season progressed and responded positively to increasing floral density. We synthesized existing literature to estimate minimum ‘pollination thresholds’ per taxa and determined that each of the most active pollinator taxa exceeded these thresholds independently. Under current conditions, renting honey bee hives may be superfluous in this system. These results can aid growers when executing pollination management strategies and further highlights the importance of monitoring and conserving wild pollinator populations.
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Yousuf, Shayista, Parveena Bano, and Shahnaz Anjum. "Status of pollinators and their role in maintaining agroecosystems." Indian Journal of Entomology 82, no. 4 (2020): 784–92. http://dx.doi.org/10.5958/0974-8172.2020.00153.4.

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Morandin, Lora A., and Mark L. Winston. "Pollinators provide economic incentive to preserve natural land in agroecosystems." Agriculture, Ecosystems & Environment 116, no. 3-4 (September 2006): 289–92. http://dx.doi.org/10.1016/j.agee.2006.02.012.

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Saunders, Manu E., Rebecca K. Peisley, Romina Rader, and Gary W. Luck. "Pollinators, pests, and predators: Recognizing ecological trade-offs in agroecosystems." Ambio 45, no. 1 (September 15, 2015): 4–14. http://dx.doi.org/10.1007/s13280-015-0696-y.

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Skidmore, Amanda R., Clancy A. Short, Chasity Dills, Karen Goodell, and Ricardo T. Bessin. "Preference of Peponapis pruinosa (Hymenoptera: Apoidea) for Tilled Soils Regardless of Soil Management System." Environmental Entomology 48, no. 4 (May 22, 2019): 961–67. http://dx.doi.org/10.1093/ee/nvz052.

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Abstract Concerns about global pollinator declines have placed a growing focus on understanding the impact of agriculture practices on valuable native pollinators in these systems. Cultivation practices such as tillage disturb agroecosystems and can have negative impacts on ground-nesting pollinators. The squash bee, Peponapis pruinosa (Say), is a ground-nesting specialist pollinator of Cucurbita (Cucurbitaceae) crops (i.e., pumpkins and squash) that often nests in agricultural fields and thus may be vulnerable to these practices. We investigated the impact of tillage on nesting behavior of P. pruinosa in plasticulture and strip-tilled squash systems. We used choice experiments to test nesting substrate preference and nesting success of caged P. pruinosa in two soil tillage systems: strip tillage and plasticulture. The strip tillage system comprised two tillage zones (strip-tilled row with no-till edges), and the plasticulture system comprised two tillage zones (plastic bed and conventional tillage edge). The results of our study indicate that P. pruinosa nesting density did not significantly differ between the strip tillage and plasticulture systems. Within each system, P. pruinosa preferred excavating nests in the most disturbed soil zones (strip-tilled row and conventionally tilled edge). In the strip tillage system, the strip-tilled row had significantly more nests than the no-till edge. Results of these studies suggest that soil tillage practices can influence P. pruinosa nesting choice and production practices should be considered when developing a pollinator protection plan.
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Nicholls, Clara I., and Miguel A. Altieri. "Plant biodiversity enhances bees and other insect pollinators in agroecosystems. A review." Agronomy for Sustainable Development 33, no. 2 (June 14, 2012): 257–74. http://dx.doi.org/10.1007/s13593-012-0092-y.

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Phillips, Benjamin W., and Mary M. Gardiner. "Use of video surveillance to measure the influences of habitat management and landscape composition on pollinator visitation and pollen deposition in pumpkin (Cucurbita pepo) agroecosystems." PeerJ 3 (November 5, 2015): e1342. http://dx.doi.org/10.7717/peerj.1342.

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Pumpkin (Cucurbita pepo) production relies on insect-mediated pollination, which is provided by managed and wild pollinators. The goals of this study were to measure the visitation frequency, longevity and temporal activity patterns of pumpkin pollinators and to determine if local habitat management and landscape composition affected this pollination service. We used video surveillance to monitor bee acitivty within male and female pumpkin flowers in 2011 and 2012 across a pollination window of 0600–1200 h. We also quantified the amount of pollen deposited in female flowers across this time period. In 2011,A. melliferamade significantly more floral visits than other bees, and in 2012Bombus spp. was the dominant pumpkin pollinator. We found variation in visitation among male and female pumpkin flowers, withA. melliferavisiting female flowers more often and spending longer per visit within them than male flowers in both 2011 and 2012. The squash beeP. pruinosavisited male flowers more frequently in 2012, but individuals spent equal time in both flower sexes. We did not find variation in the timing of flower visitation among species across the observed pollination window. In both 2011 and 2012 we found that the majority of pollen deposition occurred within the first two hours (0600–0800 h) of observation; there was no difference between the pollen deposited during this two-hour period and full pollination window (0600–1200 h). Local additions of sweet alyssum floral strips or a field buffer strip of native wildflowers did not have an effect on the foraging activity of bees or pollen deposition. However, semi-natural and urban habitats in the surrounding landscape were positively correlated with the frequency of flower visitation by wild pollinators and the amount of pollen deposited within female flowers.
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Dissertations / Theses on the topic "Pollinators in the agroecosystems"

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Morrison, Jane H. "Flowering native weeds for the conservation of wild pollinators in agroecosystems." Doctoral thesis, Universitat Politècnica de Catalunya, 2018. http://hdl.handle.net/10803/620636.

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Concerns about a global decline in pollinators have called for more knowledge about the drivers of wild pollinator abundance and diversity in agroecosystems. Agricultural intensification has been identified as the main cause of this “global pollinator crisis”, particularly, due to reductions in natural areas holding critical floral and nesting resources. Maintaining flowering weeds in agricultural field margins is often recommended as a cost-effective and efficient method of offering natural or semi-natural habitats for wild pollinator conservation. In this study, the role of flowering weeds in supporting wild bees and other flower visiting insects in Mediterranean cereal agroecosystems was investigated. This research involved a three-year, multi-farm study (Part A) which compared field margin characteristics, including the functional constitution of their floral communities, with wild bee community composition and functional structure, from sites with landscapes of varying agricultural intensity in Catalonia, Spain. The aim of this work was to investigate the value of field margins in differing landscapes and determine which biotic and abiotic margin characteristics, and which functional attributes of margin plant communities, were important for sustaining wild bee abundance and diversity. This work also involved a two-year field trial (Part B) to compare five native flowering weed species common in Catalan cereal agroecosystems: C. arvensis, D. carota, M. sylvestris, P. rhoeas and S oleraceus. The goal was to compare the attractiveness of these species to different flower visiting insect groups, assess their value in supporting wild pollinators and analyze relationships between particular floral characteristics and insect visitation rates. Overall, more than 4000 bees were collected and identified to genus and a database was compiled listing the morphophysiological features and behaviours of the observed genera. A large database was also compiled of all the flowering plant species observed in Part A, documenting the trait values relevant for this work. In Part A, generalized linear models indicated a strong inverse relationship between surrounding landscape diversity and wild bee abundance. The proportion of Halictidae bees (common generalists) increased with decreasing landscape complexity. Floral richness exhibited a positive association with number of foraging bees and morphospecies richness, and was positively correlated with the proportion of shrubs and trees represented in the margins. It was observed that wider margins held a higher proportion of perennial plants and a lower proportion of Halictidae bees. The functional attributes of margin plant communities that were observed to promote wild bee community robustness included: high nectar availability, diversity in flower colour, diversity in flower morphology and diversity in vegetation height. In Part B, the most visited species were P. rhoeas and D. carota (more visits to P. rhoeas in 2015 and more visits to D. carota in 2016), followed by mixed plots, M. sylvestris, C. arvensis and S. oleraceus. The influence of the specific floral traits of the studied species on visitation rates, calculated using general linear models, varied depending on the insect group. This study suggests that field margins are more crucial in intensively farmed areas than in heterogeneous landscapes where foraging resources are more abundant. Maintaining wide margins with high flowering plant richness, comprising perennial and shrub species, best supports a dense and diverse bee community. If necessary, it is recommended that margins be sown with native perennial flowers, with differing and overlapping flowering periods, high in nectar and pollen, with a diverse assortment of colours, shapes and plant heights, and that they be managed so that a diversity of nesting features are offered.
La creciente preocupación sobre la disminución global de polinizadores exige un mayor conocimiento de los factores que influyen sobre la abundancia y diversidad de polinizadores en los agroecosistemas. La intensificación agrícola ha sido identificada como la causa principal de esta "crisis global de polinizadores", particularmente, debido a la reducción de las áreas naturales con recursos florales y de nidificación. El mantenimiento de "malas" hierbas con flores en los márgenes de los campos agrícolas se ha recomendado como un método rentable y eficiente de ofrecer hábitats naturales para la conservación de polinizadores silvestres. En este trabajo se ha estudiado el papel que pueden tener las "malas" hierbas con flores en el apoyo de las abejas silvestres y otros polinizadores en agroecosistemas de cereales mediterráneos. Por un lado, se ha realizado un estudio de tres años (Parte A) consistente en comparar las características de márgenes de campos de cereales en Cataluña, incluida la caracterización funcional de la comunidad floral, con la composición y estructura funcional de la comunidad de abejas. El objetivo de este trabajo fue determinar las características y atributos funcionales del margen qué respaldan mejor el mantenimiento de la comunidad de abejas silvestres en diferentes paisajes. Por otro lado, también se realizó una prueba de campo de dos años (Parte B) para comparar cinco especies nativas consideradas malas hierbas, con flores, comunes en los agroecosistemas de cereales de Cataluña: Convolvulus arvensis, Daucus carota, Malva sylvestris, Papaver rhoeas y Sonchus oleraceus. El objetivo fue comparar el atractivo de estas especies para diferentes grupos de insectos, evaluando sus valores para mantener a los polinizadores silvestres, y analizando las relaciones entre sus características florales y las visitas de estos insectos. En total se recolectaron más de 4.000 abejas y se identificaron a nivel de género. En la Parte A, los modelos lineales generalizados indicaron una fuerte relación inversa entre la diversidad del paisaje circundante y la abundancia de abejas silvestres. La proporción de abejas Halictidae aumentó con la disminución de la complejidad del paisaje. La riqueza floral mostró una asociación positiva con el número de abejas de forrajeo y la riqueza de morfoespecies. Se observó que los márgenes más amplios contenían una proporción mayor de plantas perennes y una proporción menor de abejas Halictidae. Los atributos funcionales de las comunidades de plantas de los márgenes que promovieron la robustez de la comunidad de abejas silvestres fueron la alta disponibilidad de néctar, diversidad en el color de las flores, diversidad en la morfología de las flores y diversidad en la altura de la vegetación. En la Parte B, las especies más visitadas fueron P. rhoeas y D. carota, seguido de parcelas mixtas, M. sylvestris, C. arvensis y S. oleraceus. La influencia de los rasgos florales de las especies estudiadas en las tasas de visita, calculado usando modelos lineales generales, variaba dependiendo del grupo de insectos. Este estudio sugiere que los márgenes de campo son más cruciales en áreas de cultivo intensivo que en paisajes heterogéneos. El mantenimiento de amplios márgenes con alta riqueza de plantas con flores, con especies perennes y arbustivas, es la mejor manera de apoyar una comunidad de abejas densa y diversa. Si es necesario, se recomienda que los márgenes se siembren con flores perennes nativas, con períodos de floración diferentes y superpuestos, que posean alto contenido en néctar y polen, con una diversidad de colores, formas y alturas de plantas, y que se distribuyan de modo que se facilite la anidación de insectos. En función de su atractivo general para los insectos, además de otros atributos positivos, la presencia de P. rhoeas, D. carota y M. sylvestris puede contribuir a la sostenibilidad de los agroecosistemas.
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Currey, Robin. "Diversity of Hymenoptera, Cultivated Plants and Management Practices in Home Garden Agroecosystems, Kyrgyz Republic." FIU Digital Commons, 2009. http://digitalcommons.fiu.edu/etd/124.

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Pollination-dependent fruit trees grown in home gardens play an important role in the agricultural based economy of Central Asian countries, yet little is known about the status of pollinator communities, the cultivated plant composition or the factors that influence management practices in Kyrgyz home garden agroecosystems. As agricultural systems are human created and managed, a logical approach to their study blends anthropological and ecological methods, an ethnoecological approach. Over three years, I investigated how species richness and abundance of Hymenoptera, cultivated plants, and home garden management were related using quantitative and qualitative methods in the Issyk-kul Man and Biosphere reserve. Structured surveys were undertaken with heads of households using a random sample stratified by village. Gardens were then mapped with participation of household members to inventory edible species in gardens, most of which are pollinator-dependent, and to compare home garden diversity as reported by respondents during interviews. Apple diversity was studied to the variety level to understand respondents’ classification system in the context of in situ agrobiodiversity conservation. Household members identified 52 edible plant species when mapping the garden, compared with 32 reported when interviewed. The proportion of plant species received from others through exchange and the number of plots cultivated significantly explained the variation in edible plant diversity among gardens. Insects were sampled in gardens and orchards to determine potential pollinator community composition and the effect of different management practices on Hymenoptera richness and abundance. I collected 756 Hymenoptera individuals (56 bee; 12 wasp species); 12 species were new records for Kyrgyzstan or within Kyrgyzstan. Economic pressures to intensify cultivation could impact management practices that currently promote diversity. A home garden development initiative was undertaken to study management practice improvement. Participants in the initiative had higher adoption rates than controls of management practices that improve long-term yield, ecological sustainability and stability of home gardens. Home gardens, as currently managed, support abundant and diverse pollinator communities and have high cultivated plant diversity with few differences in community composition between garden management types.
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Bryan, Casey J. "THE EFFICACY OF COVER CROPS FOR POLLINATOR HABITAT PROVISION AND WEED SUPPRESSION IN A SOUTHERN ILLINOIS AGROECOSYSTEM." OpenSIUC, 2019. https://opensiuc.lib.siu.edu/theses/2489.

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Increases in agricultural intensification over the past century have resulted in significant alterations to the rural landscape across the Midwest. Pollinators are essential to sustain natural and managed ecosystems. They are vital for food production and their declines have been linked, in part, to a rise in intensive agricultural practices. There is a recognized need among numerous stakeholders to build sustainability into the management of agroecosystems to protect both the biotic and abiotic resources of these systems. The use of cover crops is gaining interest among agricultural producers for benefits such as improving water quality and soil health. Cover cropping systems have the potential to provide floral resources to pollinators and suppress problematic driver weeds. The overall objective of this study was to quantify the effects of cover crops on plant and pollinator biodiversity within agricultural systems. This study aimed to characterize the pollinator diversity indicative of the patchwork mosaic forest-agroecosystem of Crab Orchard National Wildlife Refuge; evaluate the roles cover crop treatments play in supporting pollinator diversity and weed suppression benefits in a conventionally managed system; and provide the basis of recommendations for sustainable weed suppression tactics and for enhancing the quality of pollinator habitat within agricultural systems.
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Sonja, Mudri Stojnić. "Distribucija i dinamika populacija najznačajnijih grupa polinatora u agroekosistemima Vojvodine." Phd thesis, Univerzitet u Novom Sadu, Prirodno-matematički fakultet u Novom Sadu, 2018. https://www.cris.uns.ac.rs/record.jsf?recordId=107290&source=NDLTD&language=en.

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U  radu  je  prikazana  distribucija,  dinamika  i  diverzitet  insekata oprašivača iz reda Hymenoptera  -  Apiformes (Anthophila) i Diptera Syrphidae)  na  stepskim  fragmentima  i  na  suncokretu  u agroekosistema  Vojvodine.  U  cilju  uvida  u  strukturu  predela  injenog  uticaja  na  sastav  i  brojnost  polinatora,  kartirani  su  tipovistaništa  oko  svakog  stepskog  fragmenta.  Na  osnovu  podataka dobijenih kartiranjem, odabrano je sedam stepskih fragmenata kojiu  svom  okruženju  imaju  visok  udeo  suncokreta  kao  masovnocvetajuće  kulture  i  sedam  stepskih  fragmenata  koji  su  bez  ili  saniskim  udelom  suncokreta.  Iz  reda  Hymenoptera  –  Apoideazabeleženo  je  šest  familija:  Andrenidae,  Apidae,  Colletidae,Halictidae,  Melittidae  i  Megachilidae,  114  vrsta,  a  iz  reda  Diptera(Syrphidae),  registrovano  je  ukupno  11  vrsta.  Predstavnici  familija Andrenidae, Apidae i Halictidae su distribuirani na svim lokalitetima,predstavnici  familije  Megachilidae  su  distribuirani  na  15  od  16lokaliteta,  a  najmanje  su  zastupljene  jedinke  familija  Colletidae  iMelittidae,  distribuirane  na  pet  lokaliteta.  Polinatori  reda  Diptera familije  Syrphidae  su  distribuirani  na  svim  lokalitetima.  Rezultati Kruskal-Volisovog H testa ukuzuju da je tokom sve tri sezone (2011.,2012.,  2013.)  na  stepskim  fragmentima  najviše  bilo  zastupljeno vrsta  solitarnih  pčela,  zatim  vrsta  osolikih  muva,  a  najmanje  vrsta bumbara.  Istim  testom  je  dobijano  da  je  tokom  sve  tri  sezone  na stepskim  fragmentima,  registrovano  najviše  jedinki  osolikih  muva,zatim  medonosne  pčele,  solitarne  pčele,  a  najmanje  jedinki bumbara.  Fridmanovim  testom  su  utvrđene  razlike  u  brojnosti (dinamici)  polinatora  kroz  sezone,  uočen  je  porast  broja  jedinki medonosne pčele i opadanje broja jedinki solitarnih pčela.Rezultati  dobijeni  Man-Vitnijevim  U-testom  pokazuju  da  je  nastepskim  fragmentima  koji  imaju  niži  udeo  suncokreta  u  predelu zastupljeno  više  jedinki  i  vrsta  bumbara.  Istim  testom  je  dobijen rezultat  da  je  na  stepskim  fragmentima  sa  visokim  udelom suncokreta  ima  više  jedinki  medonosne  pčele.  Vilkoksonovim testom  sume  rangova  je  pokazano  da  su  jedinke  i  vrste  bumbara zastupljenije na stepskim fragmentima nakon cvetanja suncokreta, za  vreme  cvetanja  suncokreta  na  stepskim  fragmentima  je registrovano  više  jedinki  Apis  mellifera,  osolikih  muva  i  solitarnih pčela.  Modeli  regresionih  analiza  linearnih  mešovitih  modela  su pokazali  da  se  sa  porastom  udela  suncokreta  u  predelu  smanjuje broj jedinki divljih pčela i jedinki i vrsta bumbara. Sa porastom udela polu-prirodnih  staništa  u  predelu  i  većom  cvetnom  pokrovnosti, povećava se udeo jedinki i vrsta osolikih muva.
This  paper  shows  distribution,  dynamic  and  pollinator  diversity Hymenoptera  -  Apiformes  (Anthophila)  and Diptera (Syrphidae)  in semi-natural  habitats  and  in  sunflower  crops  in  Vojvodina  agroecosystems.  Around  each  of  16  selected  steppe  fragments,  habitat types  were  mapped  to  test  how  do  landscape  structure  affects pollinator  diversity  and  abundance  in  semi  natural  habitats  and  in sunflower  crops.  Based  on  the  results  obtained  by  mapping,  seven study sites with high % of sunflower like mass flowering crops, and eight  study  sites  with  no  or  low  %  of  mass  flowering  crops  are selected. In total, there were 114 species from 6 families  from order Hymenoptera-Apiformes:  Andrenidae,  Apidae,  Colletidae, Halictidae, Melittidae and Megachilidae, and 11 species from order Diptera  (Syrphidae).  Insects  from  families:  Andrenidae,  Apidae, Colletidae  and  Halictidae  were  distributed  on  all  study  sites,  while insects  from  family  Megachilidae  were  distributed  almost  on  all study  sites  (15  sites).  At  least  only  on  five  study  sites  were distributed insects from family: Colletidae and Melittidae. Hoverflies were distributed on all study sites.  Kruskal-Wallis H test shows that an  all  three  seasons  (2011.,  2012.,  2013.)  in  semi  natural  habitats wild bees species were most abundant, followed by hoverfly species, and bumblebee species at the end. Same test  shows that  in all three seasons in semi natural habitats individuals of hoverflies were more abundant than individuals of honey bees, wild bees  and individuals of  bumblebees,  which  were  least  abundant.  Friedman  test  shows differences in densities of pollinator through the seasons, and these results  shows  increasing  in  Apis  mellifera  densities  and  decline  of wild bees densities through seasons. Man-Whitney  U-test  shows  that  there  were  more  species  and individuals of bumble bees in semi-natural habitats which landscapes are without  or low % of sunflower. Same test shows that there were more  individuals  of  honey  bees  in  semi-natural  habitats  which landscapes  have  high  %  of  sunflower.  Wilcoxon  signed-rank  test shows  that  in  semi-natural  habitats  species  and  individuals  of bumblebees  were  more  abundant  after  blooming  sunflower,  while species  and  individuals  of  wild  bees  as  well  as  individuals  of hoverflies and  Apis mellifera  were  more abundant during blooming sunflower.  Linear mixed-effect model shows that with increase of % of  sunflower  in  landscape  number  of  individuals  of  wild  bees  and species and individuals of bumblebees decreasing, and individuals of hoverflies increasing. With an increase of % of semi natural habitats and  increase  of  flower  cover,  abundance  and  species  of  hoverfliesincreases.
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Morandin, Lora A. "Wild bees and agroecosystems /." Burnaby B.C. : Simon Fraser University, 2005. http://ir.lib.sfu.ca/handle/1892/2386.

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Thesis (Ph.D.) - Simon Fraser University, 2005.
Theses ( Dept. of Biological Sciences) / Simon Fraser University. Includes bibliographical references. Also issued in digital format and available on the World Wide Web.
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Pearce, April Marie. "Pollinators of slender white prairieclover." Thesis, Montana State University, 2008. http://etd.lib.montana.edu/etd/2008/pearce/PearceA0808.pdf.

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Slender white prairieclover (Dalea candida) is a perennial angiosperm, grown at Bridger plant materials center (BMPC) for reclamation purposes. Interest in the pollinators and pests of this plant developed at BPMC following the death of a 5year old stand. The objectives of these experiments were to (1) determine the diversity and identify the potential pollinators on D. candida and other cultivated and non-cultivated angiosperm species using sweep samples and pan traps; (2) determination of pollen load size and composition of individual insects collected on angiosperm plant species; (3) use of different size exclusion cages to determine the general sizes of insects most important for pollination of D. candida at BPMC; and (4) determine the composition of the community of cavity-nesting Hymenoptera species at BPMC by using trap nests. The overall diversity of BPMC was much higher than expected in a monoculture agriculture area, with a total of 102 Hymenoptera taxa collected. Hill\'s #2 index was used to determine the diversity of different angiosperm plants and revealed that D. candida had the highest diversity. Analysis of pollen loads via the proportion of \"pure\" vs. mixed loads (PBP) and mean proportion of conspecific pollen (PCP) revealed conflicting results between the two measures, but there does appear to be some floral constancy occurring, especially in D. candida. Kruskal-Wallis tests of differences in exclusion cage treatments revealed that there are differences in pollination efficacy and the size subset allowed to reach the flowers. Emergences from trap nests revealed differences in the trap nesting community at BPMC and actual pollinator collections in the field.
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Greeson, Kimberley M. "Of Pollinators and Forests| A Multispecies Ethnography of the Biopolitical Culture of Pollinators in Hawai'i." Thesis, Prescott College, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10288361.

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Due in part to its geographic isolation and unique climate, Hawai‘i has a high number of endemic species and is considered a biodiversity hotspot. At the same time, these characteristics make Hawai‘i vulnerable to species loss. To protect endangered species, conservationists focus on preserving Hawai‘i’s native ecosystems through invasive species control and habitat restoration. Native forests are central to Hawai‘i’s watershed, provide habitat for endemic pollinators, and foster bioculture. Pollinators are integral for ecosystem health as well as for human spaces, and worldwide pollinators have been on the decline. Since pollinators and their flowering counterparts are embedded in human lives, this research challenges traditional conservation approaches by contextualizing more-than-human entanglements within social, political, and cultural milieu. The purpose of this work is to draw from posthumanism, new materialism, and indigenous discourse to examine the biopolitical issues in which Hawaii’s endemic pollinators situate to re-envision questions and ethics of conservation. The researcher followed endemic pollinators through native forests to explore the entangled relationship between humans, pollinators, and forests examining the question, what is the biopolitical culture of endemic pollinators in Hawai’i? This multi-sited, multi-method research used a mix of autoethnography, participant observations and interviews, visual data, and archival and biocultural accounts to articulate emergent findings. The findings of this dissertation discuss the nuances of multispecies entanglements and mattering, politics of biological conservation and extinction, and material-discursive understandings of place. This study suggests human/more-than-human encounters are grounded in reciprocity and responsibility and co-create place.

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Maine, Josiah J. "TROPHIC ECOLOGY OF INSECTIVOROUS BATS IN AGROECOSYSTEMS." OpenSIUC, 2014. https://opensiuc.lib.siu.edu/theses/1599.

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Land-use change is a leading cause of biodiversity loss and ecosystem service degradation worldwide, but these changes do not affect all organisms equally. Understanding the factors that influence resistance to environmental change is vital for informed conservation. In particular, dietary generalists may withstand environmental change better than specialists due to their ability to exploit variable resources. Bats are voracious predators of insects, but vary widely in their degree of dietary specialization. In Chapter 1, I analyze the effect of land cover and morphology on dietary diversity and the two most common prey items (Lepidoptera and Coleoptera) of bats, selecting important independent variables using phylogenetic generalized least squares (PGLS) and model selection. Dietary diversity increased with increasing amount of cropland near the study area, consumption of Lepidoptera decreased with increasing habitat diversity, and consumption of Coleoptera decreased with increasing distance from the equator. Biodiversity (and hence, prey diversity) is expected to decrease with agricultural intensity, but the observed pattern suggests that dietary specialists may avoid agricultural habitats due to lack of preferred prey. Dietary specialists may thus be increasingly at risk as agricultural intensity increases around the world, and it is essential that we continue to document their ecological roles and the services they provide to society
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Ellis, Ciaran R. "Valuing wild pollinators for sustainable crop production." Thesis, University of Stirling, 2014. http://hdl.handle.net/1893/22327.

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This thesis looks at the role of wild pollinators in providing services to crops. Two data chapters (2 and 3) are accompanied by a modelling chapter (4) which build on the findings of the field studies. The thesis ends with an overview of the trends in pollinator populations and how these relate to the needs of farmers in the UK (chap-ter 5). It is often assumed that commercial pollinators are appropriate substitutes of wild pollinators on farms; however this view neglects the differing roles that particular pollinator taxa might play in providing pollination services. For example, crops with a long growing system may require multiple pollinators to ensure pollination throughout the season. Strawberries in Scotland have an extremely long growing season, flowering from April to August. Chapter 2 presents a study showing season-al complementarity between different pollinating taxa across strawberry farms in Scotland. Pollinators of strawberries also differed in their responses to weather pa-rameters indicating that preserving multiple pollinator taxa could ensure yields un-der different weather scenarios. The requirements of a long-growing season and ad-verse weather may be specific to strawberry production in Scotland, but the valua-tion of multiple taxa can be generalised to systems with differing needs, and also to different ecosystem services. Wild bees are not only valuable for providing complementary services to commercial pollinators, but are also valuable in the longer term as it is unknown whether com-mercial pollinators will be available in the future. There are threats to the supply of honeybees which have already triggered price rises; such supply shocks could force farmers to leave production or to seek other ways of providing pollination, including supporting wild pollinators. However farm management pressures, in particular pes-ticide use, could threaten the ability of wild pollinators to continue to support crop production. The interplay of pesticides and pollination is discussed in chapter 3 and 4. Chapter 3 presents an experiment undertaken on soft-fruit farms which had and had not used the neonicotinoid, thiacloprid, and shows that nests exposed to thia-cloprid had higher worker mortality, and lower male production than those at con-trol farms. This has implications both for pollination services now, as worker mor-tality will reduce the number of bees visiting farms, and also for the maintenance of future pollination services through decreased reproductive capacity of exposed nests. Chapter 4 uses a theoretical model to link pesticide use and habitat use to pollina-tion services, and shows that the use of commercial pollinators could mask the de-cline in wild populations, making local extinctions more likely. Chapter 5 sets out the status and extent of pollinators in the UK, along with popu-lation trends, trends in habitat and trends in pesticide use to provide an overview of how well pollination services are likely to meet the ongoing needs of crop farmers.
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Perreault, Jonathan M. "Casting activity of Lumbricid earthworms from temperate agroecosystems." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=82405.

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Earthworms are well known for their casting and burrowing activities which improve soil structure and soil fertility. However, earthworm populations in temperate regions exhibit patchy distribution in space and time. This makes it difficult to predict how earthworm activities may influence paedogenesis and nutrient cycling processes at the ecosystem level. The main objective of this study was to determine the spatiotemporal dynamic of surface cast production of two earthworm species, Aporrectodea turgida and Lumbricus terrestris, on the row-interrow scale in a temperate soybean agroecosystem. Our observations demonstrated that casting activity was synchronous with plant growth. More casts were also found in the row intercepts compared to the interrow ones. Both the spatial and temporal variations are thought to be caused by the microclimate found under the plant canopy, verifying results from controlled laboratory studies that show casting activity to be controlled by soil temperature and moisture. These results suggest a possible mutualism between earthworm and plants in cultivated temperate soybean agroecosystems, but this remained to be confirmed.
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Books on the topic "Pollinators in the agroecosystems"

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Diane, Rickerl, and Charles Francis, eds. Agroecosystems Analysis. Madison, WI, USA: American Society of Agronomy, Crop Science Society of America, Soil Science Society of America, 2004. http://dx.doi.org/10.2134/agronmonogr43.

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Buchmann, Stephen L. The Forgotten Pollinators. Washington, D.C: Island Press [for] Shearwater Books, 1996.

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Schnug, Ewald, ed. Sulphur in Agroecosystems. Dordrecht: Springer Netherlands, 1998. http://dx.doi.org/10.1007/978-94-011-5100-9.

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Casado, Gloria I. Guzman. Energy in Agroecosystems. New York : Taylor & Francis, 2017. | Series: Advances in: CRC Press, 2017. http://dx.doi.org/10.1201/9781315367040.

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National Agroforestry Center (U.S.). Working trees for pollinators. Lincoln, Neb: U.S. Dept. of Agriculture, National Agroforestry Center, 2015.

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Symposium on Agroecology and Conservation Issues in Tropical and Temperate Regions (1990 University of Padova). Biotic diversity in agroecosystems. Amsterdam: Elsevier, 1992.

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The ecology of agroecosystems. Sudbury, Mass: Jones and Bartlett Publishers, 2010.

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Fischer, David, and Thomas Moriarty, eds. Pesticide Risk Assessment for Pollinators. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118852408.

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Tripathi, Vijay, Pradeep Kumar, Pooja Tripathi, and Amit Kishore, eds. Microbial Genomics in Sustainable Agroecosystems. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-8739-5.

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Tripathi, Vijay, Pradeep Kumar, Pooja Tripathi, Amit Kishore, and Madhu Kamle, eds. Microbial Genomics in Sustainable Agroecosystems. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-32-9860-6.

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Book chapters on the topic "Pollinators in the agroecosystems"

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Vossler, Favio Gerardo, Diego César Blettler, Guillermina Andrea Fagúndez, and Milagros Dalmazzo. "Stingless Bees as Potential Pollinators in Agroecosystems in Argentina: Inferences from Pot-Pollen Studies in Natural Environments." In Pot-Pollen in Stingless Bee Melittology, 155–75. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-61839-5_12.

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Maccagnani, Bettina, Eve Veromann, Roberto Ferrari, Luca Boriani, and Otto Boecking. "Agroecosystem Design Supports the Activity of Pollinator Networks." In Entomovectoring for Precision Biocontrol and Enhanced Pollination of Crops, 1–17. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-18917-4_1.

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Abrol, Dharam P. "Safety of Pollinators." In Pollination Biology, 311–52. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-1942-2_10.

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Abrol, Dharam P. "Decline in Pollinators." In Pollination Biology, 545–601. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-1942-2_17.

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Walker, Larissa, and Sylvia Wu. "Pollinators and Pesticides." In International Farm Animal, Wildlife and Food Safety Law, 495–513. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-18002-1_17.

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Khan, M. S., and Manish Kumar Yogi. "Insect Crop Pollinators." In Industrial Entomology, 397–412. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-3304-9_14.

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Wojtkowski, Paul. "Complex Agroecosystems." In Agroecology, 105–15. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-93209-5_7.

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Coleman, David C., and Paul F. Hendrix. "Agroecosystems Processes." In Concepts of Ecosystem Ecology, 149–70. New York, NY: Springer New York, 1988. http://dx.doi.org/10.1007/978-1-4612-3842-3_8.

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Abrol, Dharam P. "Climate Change and Pollinators." In Pollination Biology, 479–508. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-1942-2_15.

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Aoun, Mirella. "Pesticides’ Impact on Pollinators." In Encyclopedia of the UN Sustainable Development Goals, 1–11. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-69626-3_38-1.

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Conference papers on the topic "Pollinators in the agroecosystems"

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Tscharntke, Teja. "Biodiversity services in agroecosystems." In 2016 International Congress of Entomology. Entomological Society of America, 2016. http://dx.doi.org/10.1603/ice.2016.95435.

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Herren, Barbara. "Crop management friendly to pollinators." In 2016 International Congress of Entomology. Entomological Society of America, 2016. http://dx.doi.org/10.1603/ice.2016.92416.

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Pindar, Alana. "Native pollinators in Ontario agriculture." In 2016 International Congress of Entomology. Entomological Society of America, 2016. http://dx.doi.org/10.1603/ice.2016.111553.

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Viñuela, Elisa. "Field guide of Spanish pollinators." In 2016 International Congress of Entomology. Entomological Society of America, 2016. http://dx.doi.org/10.1603/ice.2016.114746.

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"Food Safety in Agroecosystems-Soil Resistome." In March 14-16, 2019 Paris (France). Eminent Association of Pioneers, 2019. http://dx.doi.org/10.17758/eares5.eap0319136.

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N K Newlands. "MODELING AGROECOSYSTEMS AS COMPLEX, ADAPTIVE SYSTEMS." In 2006 CSBE/SCGAB, Edmonton, AB Canada, July 16-19, 2006. St. Joseph, MI: American Society of Agricultural and Biological Engineers, 2006. http://dx.doi.org/10.13031/2013.22137.

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Aizen, Marcelo. "Impacts of introduced pollinators on agriculture." In 2016 International Congress of Entomology. Entomological Society of America, 2016. http://dx.doi.org/10.1603/ice.2016.92413.

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Pistorius, Jens. "Acute impact of insecticides to pollinators." In 2016 International Congress of Entomology. Entomological Society of America, 2016. http://dx.doi.org/10.1603/ice.2016.92579.

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Zhu, Jerry. "Volatile semiochemicals associated with stable fly agroecosystems." In 2016 International Congress of Entomology. Entomological Society of America, 2016. http://dx.doi.org/10.1603/ice.2016.108901.

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Smirnova, L. G., I. I. Mikhailenko, M. I. Evdokimenkova, and A. A. Kuvshinova. "Ecological aspects of biological function of agroecosystems." In РАЦИОНАЛЬНОЕ ИСПОЛЬЗОВАНИЕ ПРИРОДНЫХ РЕСУРСОВ В АГРОЦЕНОЗАХ. Federal State Budget Scientific Institution “Research Institute of Agriculture of Crimea”, 2020. http://dx.doi.org/10.33952/2542-0720-15.05.2020.03.

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he main goal of the study is to optimize the ratio of high potential productivity of winter wheat, environmental sustainability and environmental improvement functions at the level of the variety, agrocenosis, agroecosystem and agrolandscape. Research has been conducted since 2017 in a field experiment organized on the basis of an adaptive landscape approach. It was deployed on the plakor and slope of the southern exposure in parts 1-3° and 3-5°. The object of the research – varieties ‘Veselka’, ‘Synthetics’, and ‘Ariadna’ created in the Laboratory of breeding and seed production of winter wheat of Belgorod Federal Agricultural Research Center of the Russian Academy of Sciences. The ‘Almera’ variety was taken as the standard. The soil cover is represented by typical Chernozem. To improve the productivity of agricultural crops in conditions of slope agrolandscapes, it is advisable to choose and place the variety according to the selected microzone. It is necessary to cultivate the varieties at the specific plots of arable land with the most optimal parameters for the complex orographic, climatic and edaphic conditions for this variety, and in which plants will be able to give the highest yield. Thus, in plakor, it is advisable to give preference to cultivating ‘Ariadna’ and ‘Veselka’ varieties (6.2-6.3 t/ha). For slope microzones, the ‘Synthetics’ variety (4.4-5.3 t/ha) is well suited. The presented set of varieties gave stable yield in difficult conditions of erosive agricultural landscapes, thus can be considered as an innovative development in crop production.
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Reports on the topic "Pollinators in the agroecosystems"

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Alesch, Mary Sue, and Mark L. Gleason. Floral Provisioning for Wild Bee Pollinators in Winter Squash and Muskmelon. Ames: Iowa State University, Digital Repository, 2011. http://dx.doi.org/10.31274/farmprogressreports-180814-1362.

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Verma, Shashi B., Kenneth G. Cassman, Timothy J. Arkebauer, Kenneth G. Hubbard, Johannes M. Knops, and Andrew E. Suyker. Carbon Sequestration in Dryland and Irrigated Agroecosystems: Quantification at Different Scales for Improved Prediction. Office of Scientific and Technical Information (OSTI), September 2012. http://dx.doi.org/10.2172/1050841.

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Pinder, J. E. III, K. W. McLeod, D. C. Adriano, J. C. Corey, and A. L. Boni. Atmospheric deposition, resuspension and root uptake of plutonium in corn and other grain-producing agroecosystems near a nuclear fuel facility. Office of Scientific and Technical Information (OSTI), January 1989. http://dx.doi.org/10.2172/5535542.

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Pinder, J. E. III, K. W. McLeod, D. C. Adriano, J. C. Corey, and A. L. Boni. Atmospheric deposition, resuspension and root uptake of plutonium in corn and other grain-producing agroecosystems near a nuclear fuel facility. Office of Scientific and Technical Information (OSTI), December 1989. http://dx.doi.org/10.2172/10130673.

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Adams, Laurie D., Stephen Buchmann, Anna D. Howell, and Jennifer Tsang. A Study of Insect Pollinators Associated With DoD TER-S Flowering Plants, Including Identification of Habitat Types Where They Co-Occur by Military Installation in the Southeastern United States. Fort Belvoir, VA: Defense Technical Information Center, December 2010. http://dx.doi.org/10.21236/ada538617.

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S. W. Leavitt, A. D. Matthias, T. L. Thompson, and R. A. Rauschkolb. Soil carbon storage and N{sub 2}O emissions from wheat agroecosystems as affected by free-air CO{sub 2} enrichment (FACE) and nitrogen treatments. Final Report - February 12, 1999. Office of Scientific and Technical Information (OSTI), February 1999. http://dx.doi.org/10.2172/765300.

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Leavitt, S. W., A. Matthias, and T. L. Thompson. Soil Carbon Storage and N{sub 2}O Emissions from Wheat Agroecosystems as Affected by Free-Air CO{sub 2} Enrichment (FACE) and Nitrogen Treatments. Annual Progress Report - Year 1: August 1, 1996 to July 31, 1997 [Final Report]. Office of Scientific and Technical Information (OSTI), February 1999. http://dx.doi.org/10.2172/761932.

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Devereux, Stephen. Policy Pollination: A Brief History of Social Protection’s Brief History in Africa. Institute of Development Studies (IDS), December 2020. http://dx.doi.org/10.19088/ids.2020.004.

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The relatively recent emergence and sustained rise of social protection as a policy agenda in Africa can be understood as either a nationally owned or ‘donor-driven’ process. While elements of both can be seen in different countries at different times, this paper focuses on the pivotal role of transnational actors, specifically international development agencies, as ‘policy pollinators’ for social protection. These agencies deployed a range of tactics to induce African governments to implement cash transfer programmes and establish social protection systems, including: (1) building the empirical evidence base that cash transfers have positive impacts, for advocacy purposes; (2) financing social protection programmes until governments take over this responsibility; (3) strengthening state capacity to deliver social protection, through technical assistance and training workshops; (4) commissioning and co-authoring national social protection policies; (5) encouraging the domestication of international social protection law into national legislation. Despite these pressures and inducements, some governments have resisted or implemented social protection only partially and reluctantly, either because they are not convinced or because their political interests are not best served by allocating scarce resources to cash transfer programmes. This raises questions about the extent to which the agendas of development agencies are aligned or in conflict with national priorities, and whether social protection programmes and systems would flourish or wither if international support was withdrawn.
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Drought Effects on Forests and Rangelands in the US Caribbean. USDA Caribbean Climate Hub, June 2016. http://dx.doi.org/10.32747/2016.6960280.ch.

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Issues of water quality and scarcity are of great concern across the U.S. Caribbean. In recent years Puerto Rico and the U.S. Virgin Islands have experienced uncommonly dry weather that has caused moderate to severe droughts. In 2014-2015, severe drought in Puerto Rico required the implementation of water restrictions that affected millions of people. The summer of 2015 was the third driest period in Puerto Rico since 1898, forcing the strictest water rationing in its history. Emerging climate models for the region (Figure 1) predict an overall decrease in precipitation over the next century, but also to greater variance in seasonality and an increase in intense precipitation events. The temporal and spatial distribution of rainfall can have profound effects on the hydrology as well as the phenology and life-cycle of trees, rangeland species, pests and pollinators. Changing rainfall patterns will mean major adjustments in how working lands are managed by producers and planners.
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