John S. Ascher

ORCID: 0000-0002-7887-2461
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About
Contact & Profiles
Research Areas
  • Plant and animal studies
  • Insect and Pesticide Research
  • Plant Parasitism and Resistance
  • Insect and Arachnid Ecology and Behavior
  • Ecology and Vegetation Dynamics Studies
  • Species Distribution and Climate Change
  • Hymenoptera taxonomy and phylogeny
  • Animal and Plant Science Education
  • Fossil Insects in Amber
  • Plant and Fungal Species Descriptions
  • Conservation, Biodiversity, and Resource Management
  • Invertebrate Taxonomy and Ecology
  • Genetic diversity and population structure
  • Insect-Plant Interactions and Control
  • Wildlife Ecology and Conservation
  • Subterranean biodiversity and taxonomy
  • Fern and Epiphyte Biology
  • Orthoptera Research and Taxonomy
  • Environmental DNA in Biodiversity Studies
  • Insect behavior and control techniques
  • Conservation, Ecology, Wildlife Education
  • Mediterranean and Iberian flora and fauna
  • Turtle Biology and Conservation
  • Animal Behavior and Reproduction
  • Anxiety, Depression, Psychometrics, Treatment, Cognitive Processes

National University of Singapore
2016-2025

Northern Research Station
2019

Michigan State University
2019

American Museum of Natural History
2006-2016

John Wiley & Sons (United States)
2016

Connecticut Agricultural Experiment Station
2016

Ecological Society of America
2016

Rutgers, The State University of New Jersey
2016

University of Padua
2014

York University
2012

Abstract There is compelling evidence that more diverse ecosystems deliver greater benefits to people, and these ecosystem services have become a key argument for biodiversity conservation. However, it unclear how much needed in cost-effective way. Here we show that, while the contribution of wild bees crop production significant, service delivery restricted limited subset all known bee species. Across crops, years biogeographical regions, crop-visiting communities are dominated by small...

10.1038/ncomms8414 article EN cc-by Nature Communications 2015-06-16

Abstract Research on urban insect pollinators is changing views the biological value and ecological importance of cities. The abundance diversity native bee species in landscapes that are absent nearby rural lands evidence cities have implications for biodiversity conservation. Lagging behind this revised image city conservation programs historically invested education outreach rather than designed to achieve high‐priority results. We synthesized research determine how could be repositioned...

10.1111/cobi.12840 article EN cc-by Conservation Biology 2016-09-14

Pollinators such as bees are essential to the functioning of terrestrial ecosystems. However, despite concerns about a global pollinator crisis, long-term data on status bee species limited. We present study relative rates change for an entire regional fauna in northeastern United States, based >30,000 museum records representing 438 species. Over 140-y period, aggregate native richness weakly decreased, but declines were significant only genus Bombus . Of 187 analyzed individually, three...

10.1073/pnas.1218503110 article EN Proceedings of the National Academy of Sciences 2013-03-04

The phenology of many ecological processes is modulated by temperature, making them potentially sensitive to climate change. Mutualistic interactions may be especially vulnerable because the potential for phenological mismatching if species involved do not respond similarly changes in temperature. Here we present an analysis climate-associated shifts wild bees, most important pollinators worldwide, and compare these published studies bee-pollinated plants over same time period. We report...

10.1073/pnas.1115559108 article EN Proceedings of the National Academy of Sciences 2011-12-05

Summary Concern about a global decline in wild pollinators has increased interest how are affected by human land use, and this, turn, affects crop pollination. We measured bee visitation to four summer vegetable crops, investigated associations between flower rates land‐use intensity at local landscape scales. studied 29 farms New Jersey Pennsylvania, USA. Over 2 years we recorded >7400 visits flowers identified 54 species of bees visiting crops. Wild were the dominant visitors three...

10.1111/j.1365-2664.2007.01418.x article EN Journal of Applied Ecology 2007-11-01

The highly social (eusocial) corbiculate bees, comprising the honey bumble and stingless are ubiquitous insect pollinators that fulfill critical roles in ecosystem services human agriculture. Here, we conduct wide sampling across phylogeny of these bees reveal a dynamic evolutionary history behind their microbiota, marked by multiple gains losses gut associates, presence generalist as well host-specific strains, patterns diversification driven, part, host ecology (for example, colony size)....

10.1126/sciadv.1600513 article EN cc-by-nc Science Advances 2017-03-03

We describe the richness, abundance, and ecological characteristics of bees in community gardens located heavily developed neighborhoods Bronx East Harlem, NY. In total, 1,145 individual bees, representing 54 species (13% recorded New York State bee fauna) were collected over 4 yr. The nesting habits these include that nest cavities (33% species), hives (11% pith (1.9% wood or soft/rotting (7.4% species) substrates. Soil-nesting individuals relatively rare (25% individuals), perhaps due to a...

10.1603/0013-8746(2008)101[140:braain]2.0.co;2 article EN Annals of the Entomological Society of America 2008-01-01

Abstract Aim The knowledge of biodiversity facets such as species composition, distribution and ecological niche is fundamental for the construction biogeographic hypotheses conservation strategies. However, on these affected by major shortfalls, which are even more pronounced in tropics. This study aims to evaluate effect sampling bias variation collection effort Linnean, Wallacean Hutchinsonian shortfalls diversity measures richness, endemism beta‐diversity. Location Brazil. Methods We...

10.1111/ddi.12489 article EN publisher-specific-oa Diversity and Distributions 2016-09-30

Abstract Although Brazil is a megadiverse country and thus conservation priority, no study has yet quantified gaps in the Brazilian protected areas (PAs) using extensive empirical data. Here, we evaluate degree of biodiversity protection knowledge within all PAs through gap analysis vertebrate, arthropod angiosperm occurrences phylogenetic Our results show that on most remain scant as 71% have less than 0.01 species records per km 2 . Almost 55% about 40% evolutionary lineages are not found...

10.1038/s41598-017-08707-2 article EN cc-by Scientific Reports 2017-08-16

Insects are the focus of many recent studies suggesting population declines, but even invaluable pollination service providers such as bees lack a modern distributional synthesis. Here, we combine uniquely comprehensive checklist bee species distributions and >5,800,000 public occurrence records to describe global patterns biodiversity. Publicly accessible sparse, especially from developing countries, frequently inaccurate throughout much world, consequently different biodiversity data....

10.1016/j.cub.2020.10.053 article EN cc-by-nc-nd Current Biology 2020-11-20
Michael S. Engel Luis M. P. Ceríaco GIMO M. DANIEL Pablo M. Dellapé Ivan Löbl and 88 more Milen Mаrinоv Roberto Esser dos Reis Mark T. Young Alain Dubois Ishan Agarwal Pablo César Lehmann Albornoz Mabel Alvarado Nadir Álvarez Franco Andreone Katyuscia Araujo‐Vieira John S. Ascher Délio Baêta Diego Baldo Suzana Bandeira Phillip Barden Diego Andrés Barrasso Leila Bendifallah Flávio A. Bockmann Wolfgang Böhme Art Borkent Carlos Roberto Ferreira Brandão Stephen D. Busack Seth Bybee Alan Channing Stylianos Chatzimanolis Maarten J. M. Christenhusz Jorge V. Crisci Guillermo D’Elía Luís Da Costa Steven R. Davis Carlos Alberto Santos de Lucena Thierry Deuve Sara Fernandes Elizalde Julián Faivovich Harith Farooq Adam W. Ferguson Spartaco Gippoliti Francisco M. P. Gonçalves Víctor H. González Eli Greenbaum Ismael A. Hinojosa‐Díaz Ivan Ineich Jianping Jiang Sih Kahono Adriano B. Kury Paulo H. F. Lucinda John D. Lynch Valéry Malécot Mariana P. Marques John W. M. Marris Ryan C. McKellar Luís Filipe Mendes Silvio Shigueo Nihei Kanto Nishikawa Annemarie Ohler Victor G. D. Orrico Hidetoshi Ota Jorge Paiva Diogo Parrinha Olivier S. G. Pauwels Martín O. Pereyra Lueji Barros Pestana Paulo D. P. Pinheiro Lorenzo Prendini Jakub Prokop Claus Rasmussen Mark-Oliver Rödel Miguel Tréfaut Rodrigues Sara Rodrı́guez Hearty Salatnaya Íris Sampaio Alba Sánchez‐García Mohamed A. Shebl Bruna S. Santos Mónica M. Solórzano‐Kraemer Ana Carolina Andrade de Sousa Павел Стоев Pablo Teta Jean-François Trape Carmen Van-Dúnem Dos Santos Karthikeyan Vasudevan Cor J. Vink Gernot Vogel Philipp Wagner Torsten Wappler Jessica L. Ware Sonja Wedmann Chifundera Kusamba Zacharie

10.1093/zoolinnean/zlab072 article EN Zoological Journal of the Linnean Society 2021-07-28

The state of Michigan occupies an area between the Great Plains and northeastern United States, bordering four Lakes, with diverse biogeographical regions. also has second most agriculture in country, many crops that depend on bees for pollination. This unique combination provides a wide range opportunities to persist, yet there is no current published checklist these important insects. study was conducted provide first annotated bee (Apoidea: Anthophila) fauna Michigan, summarizing aspects...

10.11646/zootaxa.4352.1.1 article EN Zootaxa 2017-11-21
Toby P. N. Tsang A. A. Amado De Santis Gabriela Armas‐Quiñonez John S. Ascher Eva Samanta Ávila‐Gómez and 95 more András Báldi Kimberly M. Ballare Mario V. Balzan Weronika Banaszak‐Cibicka Svenja Bänsch Yves Basset Adam J. Bates Jess Baumann Mariana Beal‐Neves Ashley B. Bennett Antônio Diego M. Bezerra Betina Blochtein Riccardo Bommarco Berry J. Brosi Laura A. Burkle Luísa G. Carvalheiro Ignacio Castellanos Marcela Cely‐Santos Hamutahl Cohen Drissa Coulibaly Saul A. Cunningham Sarah Cusser Isabelle Dajoz Deborah A. Delaney Ek del‐Val Monika Egerer Markus P. Eichhorn Eunice Enríquez Martin H. Entling Natalia Escobedo‐Kenefic Pedro Maria Abreu Ferreira Gordon Fitch Jessica R. K. Forrest Valérie Fournier Robert Fowler Breno Magalhães Freitas Hannah R. Gaines‐Day Benoît Geslin Jaboury Ghazoul Paul Glaum José Luis González Andújar Adrian González‐Chaves Heather Grab Claudio Gratton Solène Guenat Catalina Gutiérrez‐Chacón Mark Hall Mick E. Hanley Annika L. Hass Ernest I. Hennig Martin Hermy Juliana Hipólito Andrea Holzschuh Sebastian Hopfenmüller Keng‐Lou James Hung Kristoffer Hylander Jordi Izquierdo Mary A. Jamieson Birgit Jauker Steve Javorek Shalene Jha Björn K. Klatt David Kleijn Alexandra‐Maria Klein Anikó Kovács‐Hostyánszki Jochen Krauß Michael Kuhlmann Patricia Landaverde‐González Tanya Latty Misha Leong Susannah B. Lerman Yunhui Liu Ana Carolina Pereira Machado Anson R. Main Rachel E. Mallinger Yael Mandelik Bruno Ferreira Marques Kevin C. Matteson Frédéric McCune Ling‐Zeng Meng Jean Paul Metzger Paula María Montoya‐Pfeiffer Carolina L. Morales Lora A. Morandin Jane Morrison Sonja Mudri‐Stojnić Pakorn Nalinrachatakan Olivia Norfolk Mark Otieno Mia Park Stacy M. Philpott Gideon Pisanty Montserrat Plascencia Simon G. Potts Eileen F. Power

ABSTRACT Land use change threatens global biodiversity and compromises ecosystem functions, including pollination food production. Reduced taxonomic α‐diversity is often reported under land change, yet the impacts could be different at larger spatial scales (i.e., γ‐diversity), either due to reduced β‐diversity amplifying diversity loss or increased dampening loss. Additionally, studies focus on diversity, while other important components, phylogenetic can exhibit differential responses....

10.1111/gcb.70006 article EN Global Change Biology 2025-01-01

This revision of the bee genus Bathanthidium Mavromoustakis, 1953, treats 12 species, with 11 recorded from China, including fengkaiense Niu & Zhu, sp. nov.. Two species are proposed as new combinations in Bathanthidium: Anthidium (s. str.) bicolor Wu, 2004, A. monganshanensis 2004. The two (B. bicolor, B. monganshanense) (Manthidium), previously considered to include only type Burma and Laos (published records northeastern India Malaysia based on misinterpreted localities). Trachusa...

10.11646/zootaxa.4657.1.3 article EN Zootaxa 2019-08-15

The Chinese bees of the genus Trachusa Panzer, 1804 are reviewed. Nine species confirmed to occur in China. Three new described and illustrated: (Paraanthidium) pingdaensis Niu, sp. nov., T. (P.) staabi nov. wuae distribution each is given. An illustrated key provided.

10.11646/zootaxa.4646.2.3 article EN Zootaxa 2019-07-24

The Chinese bees of the genus Anthidium Fabricius, 1804, are reviewed. Twenty-one species confirmed to occur in China, five which described and illustrated as new endemics: (Anthidium) pseudomontanum Niu & Zhu, sp. nov., A. (A.) pseudophilorum tasitiense xuezhongi (Proanthidium) qingtaoi nov.. previously unknown female kashmirense Mavromoustakis, 1937 male (P.) kashgarense (Cockerell, 1911) for first time. furcatum Wu, 2004 (junior primary homonym, nec Ducke, 1908) is replaced with its...

10.11646/zootaxa.4867.1.1 article EN Zootaxa 2020-10-22

Allometric relationships among morphological traits underlie important patterns in ecology. These are often phylogenetically shared; thus quantifying allometric may allow for estimating difficult-to-measure across species. One such trait, proboscis length bees, is assumed to be structuring bee communities and plant-pollinator networks. However, it difficult measure rarely included ecological analyses. We measured intertegular distance (as a of body size) (glossa prementum, both individually...

10.1371/journal.pone.0151482 article EN cc-by PLoS ONE 2016-03-17

Summary Bee pollinators provide a critical ecosystem service to wild and agricultural plants but are reported be declining world‐wide due anthropogenic change. Long‐term data on bee abundance diversity scarce, the need for additional quantitative sampling using repeatable methods has been emphasized. Recently, monitoring programmes have begun standardized method that employs combination of pan traps sweep netting, resulting in lethal bees. This can remove large number bees from sites during...

10.1111/2041-210x.12375 article EN Methods in Ecology and Evolution 2015-03-19

Five Chinese species of Nomia (Gnathonomia) Pauly, 2005 are treated in this paper: fusciventris Zhang & Niu, sp. nov. from Fujian Province is described as a new species; N. aurata Bingham, 1897 and wahisi 2009 recorded China for the first time, male pieli Cockerell, 1931 newly reported. An updated diagnosis provided subgenus to accommodate endemic which lack white integumental bands found most previously forms. A key known provided.

10.11646/zootaxa.4768.1.5 article EN Zootaxa 2020-04-30

Resin bees of the subgenus Ranthidiellum, are rare and endemic to Southeast Asia. These known construct resinous entrance tubes their nests. Here, new species Anthidiellum (R.) phuchongensis sp. nov. is described along with a description its nest collected from Phu Chong Na Yoy National Park, Ubon Ratchathani Province, Thailand. In addition, bee cleptoparasite, Stelis (Malanthidium) flavofuscinular , male A. ignotum Engel, 2009, for first time. A key Ranthidiellum also provided.

10.3897/zookeys.1031.57836 article EN cc-by ZooKeys 2021-04-15

Native bee species in the United States provide invaluable pollination services. Concerns about native declines are growing, and there calls for a national monitoring program. Documenting ranges at ecologically meaningful scales through coverage completeness analysis is fundamental step to track bees from communities. It may take decades before all existing specimens digitized, so projections needed now focus future research management efforts. From 1.923 million records, we created range...

10.1111/ecog.06584 article EN cc-by Ecography 2023-02-06
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