<html><head></head><body><div style="font-family:bookman old style, new york, times, serif;font-size:13px;"><div style="font-family:bookman old style, new york, times, serif;font-size:13px;"><div></div>
<div>Dear Team,</div><div>I attach my last paper about wild bees in Algeria.</div><div><br></div><div>Best regards</div><div>Prof. Leila Bendifallah</div><div>Head of Department of Agronomy</div><div>Faculty of Sciences</div><div>University Mhamed Bougara of Boumerdes</div><div>Algeria</div><div><br></div>
</div><div id="ydp45b412bbyahoo_quoted_8639979027" class="ydp45b412bbyahoo_quoted">
<div style="font-family:'Helvetica Neue', Helvetica, Arial, sans-serif;font-size:13px;color:#26282a;">
<div>
Le lundi 1 octobre 2018 à 20:00:36 UTC+1, pollinator-request@lists.sonic.net <pollinator-request@lists.sonic.net> a écrit :
</div>
<div><br></div>
<div><br></div>
<div><div dir="ltr">Send Pollinator mailing list submissions to<br></div><div dir="ltr"> <a href="mailto:pollinator@lists.sonic.net" rel="nofollow" target="_blank">pollinator@lists.sonic.net</a><br></div><div dir="ltr"><br></div><div dir="ltr">To subscribe or unsubscribe via the World Wide Web, visit<br></div><div dir="ltr"> <a href="https://lists.sonic.net/mailman/listinfo/pollinator" rel="nofollow" target="_blank">https://lists.sonic.net/mailman/listinfo/pollinator</a><br></div><div dir="ltr">or, via email, send a message with subject or body 'help' to<br></div><div dir="ltr"> <a href="mailto:pollinator-request@lists.sonic.net" rel="nofollow" target="_blank">pollinator-request@lists.sonic.net</a><br></div><div dir="ltr"><br></div><div dir="ltr">You can reach the person managing the list at<br></div><div dir="ltr"> <a href="mailto:pollinator-owner@lists.sonic.net" rel="nofollow" target="_blank">pollinator-owner@lists.sonic.net</a><br></div><div dir="ltr"><br></div><div dir="ltr">When replying, please edit your Subject line so it is more specific<br></div><div dir="ltr">than "Re: Contents of Pollinator digest..."<br></div><div dir="ltr"><br></div><div dir="ltr"><br></div><div dir="ltr">Today's Topics:<br></div><div dir="ltr"><br></div><div dir="ltr"> 1. ARTICLE: Pollinator-mediated mechanisms for increased<br></div><div dir="ltr"> reproductive success in early flowering plants [Echinacea] (Oikos<br></div><div dir="ltr"> 2018) (De Angelis, Patricia)<br></div><div dir="ltr"> 2. Pesticides an bee memory (De Angelis, Patricia)<br></div><div dir="ltr"><br></div><div dir="ltr"><br></div><div dir="ltr">----------------------------------------------------------------------<br></div><div dir="ltr"><br></div><div dir="ltr">Message: 1<br></div><div dir="ltr">Date: Mon, 1 Oct 2018 09:39:52 -0400<br></div><div dir="ltr">From: "De Angelis, Patricia" <<a href="mailto:patricia_deangelis@fws.gov" rel="nofollow" target="_blank">patricia_deangelis@fws.gov</a>><br></div><div dir="ltr">To: Pollinator <<a href="mailto:Pollinator@lists.sonic.net" rel="nofollow" target="_blank">Pollinator@lists.sonic.net</a>><br></div><div dir="ltr">Subject: [Pollinator] ARTICLE: Pollinator-mediated mechanisms for<br></div><div dir="ltr"> increased reproductive success in early flowering plants [Echinacea]<br></div><div dir="ltr"> (Oikos 2018)<br></div><div dir="ltr">Message-ID:<br></div><div dir="ltr"> <CAAePDe9DBmPuW1e2L06LxzDCKXjCCg5potvc4vB5+<a href="mailto:PHWxK__PA@mail.gmail.com" rel="nofollow" target="_blank">PHWxK__PA@mail.gmail.com</a>><br></div><div dir="ltr">Content-Type: text/plain; charset="utf-8"<br></div><div dir="ltr"><br></div><div dir="ltr">NOTE: ECHINACEA ANGUSTIFOLIA is an early flowering species native to the<br></div><div dir="ltr">tallgrass prairie and North American Great Plains, which is among the most<br></div><div dir="ltr">endangered habitats in the world [NSF 2014<br></div><div dir="ltr"><<a href="https://nsf.gov/discoveries/disc_summ.jsp?cntn_id=130338" rel="nofollow" target="_blank">https://nsf.gov/discoveries/disc_summ.jsp?cntn_id=130338</a>>]. This species<br></div><div dir="ltr">was chosen as the focal species for this research because 1) information<br></div><div dir="ltr">about its pollination and flowering biology exists; and 2) its reproduction<br></div><div dir="ltr">is known to decrease with habitat fragmentation. Considered to be one of<br></div><div dir="ltr">the best perennial flowers for bees, Over 26 pollinator species visit this<br></div><div dir="ltr">plant and yet isolated plants are consistently pollinator limited. This<br></div><div dir="ltr">research explores how three aspects of "pollinator services" change over<br></div><div dir="ltr">the season: which pollinator species are visiting? how many visits each<br></div><div dir="ltr">taxon makes? and how much pollen is transferred within the same plant<br></div><div dir="ltr">species?<br></div><div dir="ltr"><br></div><div dir="ltr">POLLINATOR-MEDIATED MECHANISMS FOR INCREASED REPRODUCTIVE SUCCESS IN EARLY<br></div><div dir="ltr">FLOWERING PLANTS<br></div><div dir="ltr">By: Jennifer L. Ison, Leah J. Prescott, Scott W. Nordstrom, Amy Waananen<br></div><div dir="ltr">and Stuart Wagenius<br></div><div dir="ltr">Oikos 00: 1?13, 2018<br></div><div dir="ltr"><br></div><div dir="ltr">ABSTRACT<br></div><div dir="ltr">Mating activities change within a season in many animal and plant<br></div><div dir="ltr">populations. In plants, selection towards early flowering is commonly<br></div><div dir="ltr">observed. Pollinator-mediated selection is hypothesized to be a pervasive<br></div><div dir="ltr">evolutionary force acting directionally on flowering time. However,<br></div><div dir="ltr">pollinator-mediated mechanisms have rarely been tested in realistic field<br></div><div dir="ltr">conditions, especially in perennial plants visited by a diversity of<br></div><div dir="ltr">generalist insect pollinators. We examined pollinator visitation in eight<br></div><div dir="ltr"> ECHINACEA ANGUSTIFOLIA (hereafter Echinacea) populations in western<br></div><div dir="ltr">Minnesota, USA, to gauge the potential for pollinator-mediated selection.<br></div><div dir="ltr">Echinacea is a common prairie perennial that persists in isolated remnant<br></div><div dir="ltr">populations. Echinacea is self-incompatible and is pollinated by a<br></div><div dir="ltr">diversity of generalist solitary bees. A previous study found that early<br></div><div dir="ltr">flowering Echinacea plants have higher seed set and their reproduction is<br></div><div dir="ltr">less pollen-limited than late flowering plants. Twelve times throughout a<br></div><div dir="ltr">flowering season, we quantified pollinator visitation rates and pollinator<br></div><div dir="ltr">community composition. In three sites, we also estimated the quality of<br></div><div dir="ltr">pollinator visits by examining the composition of pollinators? pollen loads<br></div><div dir="ltr">brought to Echinacea plants. We found that three aspects of pollination<br></div><div dir="ltr">dramatically decreased over the course of the flowering season. 1)<br></div><div dir="ltr">Pollinators visited early flowering plants more frequently than late<br></div><div dir="ltr">flowering plants. 2) The pollinator community was also less diverse late in<br></div><div dir="ltr">the flowering season and became dominated by a single species of small bee,<br></div><div dir="ltr">AUGOCHLORELLA AURATA. 3) Pollinators visiting Echinacea late in the season<br></div><div dir="ltr">carried proportionally less conspecific pollen compared to pollinators<br></div><div dir="ltr">visiting Echinacea early in the flowering season. Understanding<br></div><div dir="ltr">within-season dynamics of pollination helps predict the prevalence of<br></div><div dir="ltr">inbreeding, phenological assortative mating, and reproductive failure,<br></div><div dir="ltr">especially in fragmented plant populations.<br></div><div dir="ltr">-------------- next part --------------<br></div><div dir="ltr">An HTML attachment was scrubbed...<br></div><div dir="ltr">URL: <<a href="http://lists.sonic.net/pipermail/pollinator/attachments/20181001/3cf84199/attachment-0001.html" rel="nofollow" target="_blank">http://lists.sonic.net/pipermail/pollinator/attachments/20181001/3cf84199/attachment-0001.html</a>><br></div><div dir="ltr"><br></div><div dir="ltr">------------------------------<br></div><div dir="ltr"><br></div><div dir="ltr">Message: 2<br></div><div dir="ltr">Date: Mon, 1 Oct 2018 12:59:05 -0400<br></div><div dir="ltr">From: "De Angelis, Patricia" <<a href="mailto:patricia_deangelis@fws.gov" rel="nofollow" target="_blank">patricia_deangelis@fws.gov</a>><br></div><div dir="ltr">To: Pollinator <<a href="mailto:Pollinator@lists.sonic.net" rel="nofollow" target="_blank">Pollinator@lists.sonic.net</a>><br></div><div dir="ltr">Subject: [Pollinator] Pesticides an bee memory<br></div><div dir="ltr">Message-ID:<br></div><div dir="ltr"> <CAAePDe9h6pAw9OALjqzS1FcwxvSCLY_TmbwyNCbtEdKPcp0=<a href="mailto:-A@mail.gmail.com" rel="nofollow" target="_blank">-A@mail.gmail.com</a>><br></div><div dir="ltr">Content-Type: text/plain; charset="utf-8"<br></div><div dir="ltr"><br></div><div dir="ltr">Recent article from<br></div><div dir="ltr">*Ecological Society of America*<br></div><div dir="ltr">30 August 2018<br></div><div dir="ltr"><<a href="https://esajournals.onlinelibrary.wiley.com/doi/full/10.1002/fee.1940" rel="nofollow" target="_blank">https://esajournals.onlinelibrary.wiley.com/doi/full/10.1002/fee.1940</a>><br></div><div dir="ltr">*Dispatches*<br></div><div dir="ltr">Pesticides and bee memory<br></div><div dir="ltr"><br></div><div dir="ltr">Richard Kemeny<br></div><div dir="ltr"><br></div><div dir="ltr">Pesticides are negatively affecting the memory and learning ability of<br></div><div dir="ltr">bees, according to a new study (*J Appl Ecol* 2018;<br></div><div dir="ltr">doi.org/10.1111/1365-2664.13193). Social bees must remember the location of<br></div><div dir="ltr">thousands of food sources and return to the hive, meaning that memory loss<br></div><div dir="ltr">could have major consequences for colony survival, with possible<br></div><div dir="ltr">ramifications for agriculture and food security.<br></div><div dir="ltr"><br></div><div dir="ltr">A team at the Royal Holloway University of London (Egham, UK) conducted a<br></div><div dir="ltr">meta?analysis covering 23 papers, spanning almost a decade. The analysis<br></div><div dir="ltr">focused on studies using a common test for learning and memory in bees, in<br></div><div dir="ltr">which they learn to associate an unknown scent with a sucrose reward. The<br></div><div dir="ltr">researchers wanted to determine the effects of field?realistic doses ? a<br></div><div dir="ltr">contentious term, which they defined after consulting various recent<br></div><div dir="ltr">sources in the scientific literature. They also distinguished between acute<br></div><div dir="ltr">(one dose) and chronic (repeated doses over a period of days) exposure to<br></div><div dir="ltr">insecticides.<br></div><div dir="ltr"><br></div><div dir="ltr">Combining data from across the studies showed significant impacts in both<br></div><div dir="ltr">learning and memory, even after just one brief encounter. ?This occurs even<br></div><div dir="ltr">at the low levels of pesticides that bees would routinely encounter in the<br></div><div dir="ltr">field?, says lead author Harry Siviter. Long?term exposure had additional<br></div><div dir="ltr">impacts on memory.<br></div><div dir="ltr"><br></div><div dir="ltr">?Our findings highlight the need for policy makers and regulators to<br></div><div dir="ltr">increasingly consider the sublethal impacts of insecticides on important<br></div><div dir="ltr">pollinators such as bees?, Siviter continues. The research also exposes key<br></div><div dir="ltr">knowledge gaps. ?Especially relevant is the scarcity of studies on the most<br></div><div dir="ltr">sensitive life stage of bees ? the larvae?, explains Edward Mitchell,<br></div><div dir="ltr">a professor at the Institute of Biology, University of Neuch?tel<br></div><div dir="ltr">(Neuch?tel, Switzerland).<br></div><div dir="ltr"><br></div><div dir="ltr">Earlier this year, the European Union voted in favor of a near?total ban on<br></div><div dir="ltr">neonicotinoids ? the most widely used insecticide ? which is expected to<br></div><div dir="ltr">come into force in the coming months. But crucially, the team found no<br></div><div dir="ltr">difference between the impact of these and other pesticides on learning and<br></div><div dir="ltr">memory. ?We should seriously question the idea that any pesticide can be<br></div><div dir="ltr">deemed safe for bees and other pollinators?, says Mitchell. ?The question<br></div><div dir="ltr">here of course is sustainability in the very long term, and the<br></div><div dir="ltr">conservation of viable populations of pollinators.?<br></div><div dir="ltr">-------------- next part --------------<br></div><div dir="ltr">An HTML attachment was scrubbed...<br></div><div dir="ltr">URL: <<a href="http://lists.sonic.net/pipermail/pollinator/attachments/20181001/e3d74646/attachment-0001.html" rel="nofollow" target="_blank">http://lists.sonic.net/pipermail/pollinator/attachments/20181001/e3d74646/attachment-0001.html</a>><br></div><div dir="ltr"><br></div><div dir="ltr">------------------------------<br></div><div dir="ltr"><br></div><div dir="ltr">Subject: Digest Footer<br></div><div dir="ltr"><br></div><div dir="ltr">_______________________________________________<br></div><div dir="ltr">Pollinator mailing list<br></div><div dir="ltr"><a href="mailto:Pollinator@lists.sonic.net" rel="nofollow" target="_blank">Pollinator@lists.sonic.net</a><br></div><div dir="ltr"><a href="https://lists.sonic.net/mailman/listinfo/pollinator" rel="nofollow" target="_blank">https://lists.sonic.net/mailman/listinfo/pollinator</a><br></div><div dir="ltr"><br></div><div dir="ltr"><br></div><div dir="ltr">------------------------------<br></div><div dir="ltr"><br></div><div dir="ltr">End of Pollinator Digest, Vol 2065, Issue 1<br></div><div dir="ltr">*******************************************<br></div></div>
</div>
</div></div></body></html>