written by: Ben Burgunder Across Maryland and the Mid-Atlantic United States, fall is rapidly approaching. But as the weather chills and pumpkins appear on porches, yard-owning Americans have a big choice to make: should they remove fallen leaves or let them rest? Every year, trees in urban America drop an estimated 37 million tons of leaves (Nowak & Greenfield, 2018). When homeowners elect to remove their fallen leaves, what happens to the spiders, caterpillars, beetles, and other insects that rely on decaying leaves for food and shelter? While it had been determined that removing leaves was bad news for soil-dwelling arthropods (Ober and DeGroote, 2014), inspiring campaigns to “Leave the Leaves” (AP News, Xerces Society), no one had yet tested this for aboveground insects and spiders. Dr. Max Ferlauto (Fig. 1), the state entomologist of Maryland and recent graduate of the University of Maryland’s Department of Entomology, was up for the challenge. Over two years, he experimented with the fallen leaves of 20 pesticide-free suburban Maryland yards to work out the hidden effects of leaf removal on insects and the ecosystem. He set up experimental and control square meters across the lawns. In the experimental squares in ‘high maintenance’ spaces, areas of yards that were regularly raked, he added leaves. In the ‘low maintenance’ experimental squares, located in areas of the yard where leaves were historically left to rest, he removed the leaves. In the spring, he set up traps that captured insects emerging from these squares, which allowed him to sample the tens of thousands of pollinators, predators, herbivores, and decomposers that dwell in yards. written by: Amanda Brucchieri
You’re standing in front of a wall of mosquito repellent. You need to choose the best product, or you are going to be itchy and rather miserable. An ad for some obscure product interrupts the music from the store's speakers and you know you are running out of time to decide. What bottle do you reach for? Dr. Chris Potter, a researcher and professor from Johns Hopkins may have some useful information that will have you choosing the right product for you. written by: Margaret Ann Schaefer In her talk “Working at the Intersection: Reflections on public engagement in science,” Dr. Holly Menninger, Executive Director of the Bell Museum in Minnesota, discussed her path into a career of science communication. Although Dr. Menninger is now deeply involved in public engagement, it was not her original plan when she started at the University of Maryland as a student of Dr. Margaret Palmer. She also states she “never had an ah-ha moment” where she suddenly realized that was what she wanted to do – her career has been a journey in different areas of engagement (including science policy and extension) that ultimately led her to the museum field. While she was at UMD, she studied the effect of the nutrient pulse from the 2004 Brood X cicada emergence (and subsequent input to many streams) on stream metabolism. These periodical cicadas took flight across the Washington DC Metro area after seventeen years of feeding on tree roots as nymphs. When they came out and generated interest in the public, Dr. Menninger – as part of a group of grad students known as the “Cicadamaniacs” -- found herself the spokesperson. She noted that she had her first foray in media outreach live on CNN’s American Morning because Dr. Mike Raupp, the ‘Bug Guy,’ was appearing on ABC’s Good Morning America. written by: Jenan Baher El-Hifnawi
The Entomology Retreat looked quite different this year than it did in years prior. For the first time ever the department’s students, staff, and faculty piled into the wood-paneled walls of the Samuel L. Riggs Alumni Center. Historically, the event has been held in Annapolis, at The National Socio-Environmental Synthesis Center (SESYNC). Notably, the center was founded by the department’s own Dr. Margaret Palmer. More recently, departmental surveys revealed that the distance to the retreat as well as its being held on a Saturday were factors hindering department members ability to attend. In response to these findings the retreat was moved to an on-campus location and held on a Friday, maximizing attendance, and with it, opportunities for connection. This change was implemented for the first time last year, taking place in the Edward St. John Teaching and Learning Center, and the retreat has continued to evolve since. written by: Lasair ni Chochlain
Climate change is something that we are all worried about. But as scientific researchers, linking fields as disparate in focus as evolutionary development and global change is quite a challenge. Dr. Yui Suzuki from Wellesley College is helping to pioneer this interdisciplinary research area by exploring how climate change may shape insect evolution and development. The UMD Department of Entomology hosted Dr. Suzuki for a talk on his research as well as a talk on his experience as a liberal arts professor on August 30, 2024. written by: Ben Gregory
Compare the ears of these two species of rabbits: the Eastern cottontail rabbit (left), native to the temperate forests of the eastern United States; an6d the black-tailed jackrabbit (right), which lives in the deserts of the Western US and Mexico. The jackrabbit has much larger ears relative to the size of its body. Evolutionary biologists think that this species’ large ears may be an adaptation to deal with high temperatures. Rabbits living in the desert face a much higher risk of overheating than rabbits living in the much cooler forests on the east coast. Larger ears allow for more surface area for the rabbits to dissipate heat into the air far from their high-temperature core. Natural selection on rabbits in these very hot environments favored rabbits with larger ears because rabbits with smaller ears were more likely to experience the negative consequences of overheating. Over many generations, this continued pressure led to rabbits with larger and larger ears, while rabbits on the east coast did not experience this pressure, and so did not gain this trait. By Lasair ní Chochlain and Eva Perry Urban trees provide important habitats for insects and other arthropods. Dr. Paola Olaya-Arenas, an adjunct professor at Universidad Icesi, presented the results of her research on Bogotá’s urban trees and associated insect communities to the University of Maryland’s Department of Entomology this April. Dr. Olaya-Arenas and collaborators sampled insects associated with Ficus americana Aubl. located in parks and on sidewalks in three urban areas in Bogotá, Colombia. A diverse and abundant community of herbivores, predators, and parasitoids was sampled, and information about their feeding habits, other host trees, and damage to plant tissue is described in Dr. Olaya-Arenas et al., 2022 bilingual publication “Insects associated with urban trees in Bogotá (Colombia): exploring their diversity and function.” This publication can be downloaded from the following link (Electronic book link), and it is a good guide for citizens and visitors of the city. By: Amanda Brucchieri and Helen Craig
On any given day, Dr. Tanisha Williams might be found exploring the desert in search of bush tomatoes, analyzing historical herbarium samples, or nurturing a vibrant community of Black botanists. What underscores all her work is the elevation and exploration of the relationships between people and plants, especially in the context of human mediated climate change caused by anthropogenic greenhouse gases (IPCC, 2013). In her work, Dr. Williams investigated how this change is affecting the phenology and diversity of plants, particularly in the context of climate change and Traditional Ecological Knowledge (TEK). written by: Ben Gregory and Minh Le
Vampires do exist – they’re just tiny and have six legs. Blood-feeding insects, such as mosquitoes, feed on the blood of other animals to complete their life cycle. Blood provides many essential nutrients that aren’t easy to get elsewhere in nature. Unfortunately for us, blood-feeding insects can carry pathogens that cause human diseases, like malaria, West Nile, and Zika. For this reason, many scientists are interested in learning how the process of blood feeding works, and what we might be able to do to keep ourselves safe from it. One of these scientists, Dr. Chloé Lahondère of the Department of Biochemistry at Virginia Tech, has spent years learning about one unusual element of blood-feeding that you probably haven’t considered: how to stay cool. Your blood is hot – about 100°F in your body! Given that insects are cold-blooded animals and must maintain their body temperature below a certain level, the question arises “how does a blood-feeder feed on piping hot blood without overheating? Dr. Lahondère is using the kissing bug (Figure 1, Left) to answer this question.
[Seminar Blog] Designing and managing agricultural landscapes for insect driven ecosystem services4/2/2024
written by: Brendan Randall & Angela Saenz A brisk, foggy morning; the sun rises on a midwest farm. Corn stalks sway for as far as the eye can see, seemingly the only life around. If one looks carefully, however, one will find the farm is teeming with life. Dr. Nate Haan is fascinated by the diversity of organisms on farms and how we can understand their ecology to improve farm sustainability and conservation of native biodiversity. Now an assistant professor in the Entomology Department at the University of Kentucky (UK), he is excited to answer fundamental questions about how farm management practices affect insects. In his seminar talk, Dr. Haan presented various approaches to test his central research question–does management affect insects in agricultural landscapes? written by: Jenan El-Hifnawi and Michael Adu-Brew Academic institutions pride themselves on principled support for evidence-based solutions. This support, however, does not always seem to apply to institutional approaches to Diversity, Equity, and Inclusion (DEI) argues Dr. Raul Medina, a professor and member of the Diversity Science Research Cluster at Texas A&M. written by: Angela Saenz and Eva Perry
Islands have been the backdrop of considerable scientific research and advancement for centuries, and not just because they tend to double as a nice vacation spot. What makes many islands so special to science and scientists is their isolation from other land masses, limiting the movement of species to and from them. This isolation provides a rare open-air opportunity to study how evolutionary processes shape ecological communities: think Darwin’s finches and the Anolis lizards of the Caribbean, or, in Dr. Natalie Graham’s case, arthropods on the Hawaiian archipelago. written by: Allison Huysman, Kathleen Evans & Taís Ribeiro As entomologists, we are often asked what mosquitoes are good for. These commonly hated insects - which are especially pesty during the summer months - are actually fascinating research subjects. Mosquitoes are extremely diverse, with around 3,500 species, and are also ecologically relevant. Several species are responsible for biological control (by eating other mosquito larvae that cause diseases) and others even pollinate! Unfortunately, some species drink human blood, and some of these are vectors of deadly diseases. Studying these vectors can help improve the prediction of diseases and help to control outbreaks. Here at the University of Maryland Entomology Department, students in the Fritz lab research different ways to predict the spread of Culex mosquitoes (Figure 1) and the viruses they can spread. In their Research in Progress talks, M.Sc student Ben Burgunder and Ph.D student Ben Gregory presented their work modeling the community composition and thermal tolerance of Culex mosquitoes. written by: Megan Ma and Eric Hartel
Scientists can propose how and why species evolve by studying the shapes of anatomical structures across animals. They can investigate what morphologies may correlate with specific functions and how the interplay between an organism’s environment and its morphology can facilitate diversification. In a well-known example, Charles Darwin observed many species of finches with varying beak shapes and sizes. A correlation was found between beak morphology and diet type: insectivorous finches had long, sharp beaks to probe and capture prey, while seed-eating finches had stronger, shorter beaks to crack open seed casings. With modern tools, continued research on these finches reveals greater information on their evolution, such as how beak shape is also correlated with altered vocalizations. It has also helped explain how different species with different beak morphologies coexist in the same habitat1. These beaks are an example of how shapes evolve to accommodate the survival and fitness of an organism, and this study system is an example of how the incorporation of modern techniques allows for the comprehensive study of shape evolution. written by: Michael Adu-Brew & Ben Burgunder
When most people think of mathematicians, scenes of squawking flocks of birds being herded into arenas, tiny ticks being carefully painted with nail polish, and an army of permethrin-soaked undergraduate researchers do not come to mind. These people do not know Dr. Holly Gaff. On Friday, October 27th, Dr. Gaff, Professor and Chair of Biological Sciences at Old Dominion University (ODU), spoke to the UMD Department of Entomology about her exciting research on the ticks of southeastern Virginia. A mathematician by training, Dr. Gaff was ‘bitten’ by the tick research bug when she realized how mathematical modeling and simulation could help decipher the complex and unpredictable life histories of ticks that threaten public health across the country. by: Alireza Shokoohi, Robert Salerno and Leo Kerner
Native pollinators are the largely unsung heroes of our ecosystems, but they face an alarming risk that we've long underestimated. New research from Dr. Vera Krischik’s lab shows that the situation may be more dire than expected. Dr. Krischik is an Associate Professor and Extension Specialist at the University of Minnesota investigating the impact of neonicotinoid insecticide residues on pollinators such as wild bees and butterflies. Her research is crucial for understanding and protecting the lives of these beneficial insects that we often take for granted. By Amanda Brucchieri and Helen Craig
Imagine biking down a road, along the edge of a cornfield with stalks reaching far above your head. Drifting across your path, riding the breeze, is a monarch butterfly. It flutters and then glides as butterflies do, looking for the next patch of flowers to feed and rest. Bursting from this peaceful scene comes a team of scientists with nets, scopes, and chirping walkie-talkies. They are on a mission. They are tracking the same monarch that had just coasted by using radio telemetry. written by: Leo Kerner & Angela Saenz
Imagine a lush, highly diverse field of papaya that requires limited chemical interference to control insect and weed pests. This is the reality of living mulch. Dr. Robin Gomez, an associate professor of Weed Science at the University of Costa Rica, studies sustainable pest control methods in tropical ecosystems. He suggests that the key to successful implementation of sustainable agricultural practices relies on acquiring specialized knowledge of each system. When you see a honey bee buzzing around, or while you spread honey on your toast, have you ever wondered how old the honey bees that are visiting flowers or making honey are? The answer is: it depends. Worker honey bees assume different jobs in their life, and that role changes with age. Young workers take care of the colony, nursing and feeding the larvae. Later they become guards, protecting the hive. When the worker bee is even older, they take on the job of exploring the outdoors and foraging nectar and pollen for the colony. So, a bee pollinating a flower is probably older than the bee that made your honey.
written by: Mariom Carvajal
Insects are critical to the function of ecosystems and provide benefits to humans, such as pollination and biological control. Although many insects hold great economic and cultural value to humans and benefit our lives, some reduce agricultural productivity and others pose risks to human health. To find new ways to manage these pests, some Entomologists turn to the study of invisible cellular processes or insect-microbe interactions. Two research in progress talks presented on March 10th 2023 by University of Maryland researchers, Dr. Anastasia Naumenko and Mr. Brendan Randall, focused on how knowledge of these microscopic processes can be used for the benefit of agricultural and public health systems. By Ben Gregory
These days, most Americans don’t worry too much about malaria, the deadly disease caused by the Plasmodium parasite and spread by Anopheles mosquitoes (Figure 1, left). That wasn’t always the case, however. In fact, during the nineteenth century, malaria was one of the leading causes of death in the United States, affecting nearly every corner of the country, but particularly the south (Hong 2008). Fortunately for those of us living here today, malaria is extremely rare. This is thanks to sweeping control and public health measures taken by the CDC and its predecessor organizations in the early and mid-twentieth centuries. But, more recently, another mosquito-borne disease of concern has spread across the country: West Nile fever. [Seminar Blog] Caste-switching jumping ants: studies on the plasticity of reproduction and lifespan5/3/2023
By Megan Ma
Dr. Francisco Carmona-Aldana (he/him), a postdoctoral scholar at the New York University School of Medicine, recently presented his research on “Ants: studies on the plasticity of reproduction and lifespan” which focuses on how ants obtain tradeoffs between reproduction and longevity through caste-switching. In the collaborative projects led by Dr. Danny Reinberg and Dr. Claude Desplan, he and his team study ants of the species Harpegnathos saltator as an experimental model to understand how aging can be regulated. H. saltator ants are peculiar in that workers can become pseudo-queens and take reproductive control of their colonies when a queen is absent. A group of 4 to 6 ants will undergo antennal dueling, a behavioral interaction to determine who will become pseudo-queens, or “gamergates.” These gamergates will have active ovaries, lay eggs, and extend their lifespans to accommodate this reproductive caste-switching. They live for 3 years in comparison to their lifespan as a former worker (1 year) and the maximum lifespan found in queens (5 years). In addition to altering the duration of their lifespans, gamergates have the potential to revert back to their worker states (induced in laboratory conditions). They can return to their original, non-reproductive role to perform their worker duties and no longer produce eggs. Written by: Lindsay Barranco
Dr. Krisztina Christmon has measured approximately 100,000 mites during the course of her PhD studies at the University of Maryland, which may very well be a world-record. She recently presented her research exit seminar entitled “Varroa destructor: abiotic and biotic correlates to body size, and the effects of size and host type on mite tolerance to acaricide exposure” and described how her inquiry into mite size variability began in 2016, as a new PhD student in the UMD Bee Lab. The UMD Bee lab administers the National Honeybee Disease Survey (NHDS), and maintains collected data from large and small-scale beekeepers across the United States in order to detect honey bee disease and monitor for invasive species. Invasive species, particularly varroa mites, pose a serious threat to honey bee health which in turn, potentially impacts the important pollination services honey bees provide to fruit and vegetable growers nationwide. written by: Amanda Rae Brucchieri and Robert Joseph Salerno
"The good thing about science is that it’s true whether or not you believe in it.” -Neil deGrasse Tyson. Can this quote be contested? To answer this question, one must consider the way scientific knowledge is continually evolving. The scientific process is self-correcting, meaning the acceptance of ideas should be based on available data. What is often overlooked are the influences of politics, policy, culture, and community in the process of science and the acceptance of scientific data. Dr. Fred Gould, a distinguished professor of Entomology at North Carolina State University whose relationship with the University of Maryland extends back over 30 years, addressed a full hall about this shadowed intersection of science and society. In his talk, Gould dove into the 16-year ban of Mendelian genetics in the Soviet Union and the history that resulted in the ban’s conception. |
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