Welcome to my website. Below find posts with interesting links or explore the rest of my website to see my teaching and research interest. I am interested in the following topics aquatic ecosystem ecology; invasive species; technology and aquatic ecosystems; biogeochemistry; lake metabolism; human impacts on streams, rivers, and lakes.
Our new peer-reviewed paper is out in the journal Inland Waters. We studied how nitrogen and phosphorus can limit phytoplankton growth in freshwater lakes. We performed identical experiments in 16 lakes across northeastern United States; we found that phytoplankton communities were limited by nitrogen in some lakes, phosphorus in others, and both in more. The limitation was related to land-use and lake characteristics.
This was a large co-authored paper with many participants including professors and students across 12 institutions. The project stemmed from our annual northeastern Global Lakes Ecological Observatory Network (GLEON) meeting where we co-developed the project and experimental design. The study was led by an amazing group of undergraduates, Abby Lewis (Pomona College ’19), Brian Kim (Colby College ’18), Hailee Edwards (SUNY New Paltz ’18), and Heather Wander (SUNY New Paltz ’18) along with Denise Brueswitz (Professor at Colby College) and myself. Our group worked incredibly hard on the data analysis, writing, and coordinating a large collaborative group.
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Our new peer-reviewed paper is in the September issue of the journal Freshwater Science. We have been studying Lake Minnewaska for many years now and found successive (serial) introductions of two fish species – first a minnow (Golden shiner) followed by Largemouth bass. We discovered that the bass ate all the minnows and following the loss of all minnows from the lake, the lake partially returned to pre-fish conditions including high water clarity.
My co-authors are all undergraduates from SUNY New Paltz from a variety of majors (Biology, Biochemistry, and Environmental Geochemical Sciences) who have gone on different career paths. All co-authors were incredibly involved in the process. We met for 2+ years in multiple research classes working through data collection, data analysis, writing, etc…; most of the students spent summers as paid researchers via various programs and grants. They devoted a ton of time and effort, even post graduation to seeing this paper get published. Hopefully, this process was informative and helped them develop useful skills for their future careers. (Thanks Emma, Hailee, Dejea, Avery, Sawyer, Kayla, and Heather!)
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This past year, Livi Carlen and Luke Barnell (SUNY New Paltz Graphic Design ’19) worked with my lab to create a short documentary titled “Algal Growth in Freshwater Lakes.” We detail how the synergy of climate change and excess nutrients could be increasing algal blooms in our freshwater lakes. Considering the importance of lakes in providing goods and services to humans, this topic is incredibly important to keeping our lakes healthy. See the short above or linked here.
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Heather Wander (Biology ’18) just recently graduated after a long and successful time in my lab. Just to highlight some of her accomplishments, Heather presented her research at multiple national meetings including the Ecological Society of America 2017 meeting in Portland, Oregon, the 2017 Global Lakes Ecological Observatory Network all-hands meeting at the Mohonk Mountain House and the 2018 Global Lakes Ecological Observatory Network all-hands meeting at Rottnest Island just off the coast of Perth, Australia. Heather is also a co-author on three manuscripts stemming from her research (one paper is accepted in the peer-reviewed journal Freshwater Science, one is submitted to the peer-reviewed journal Inland Waters) and the lead author on a manuscript examining the vertical distribution of zooplankton in lakes with differing food webs.
In 2011, two large tropical cyclone passed over northeastern North America. We examined the effects of the large storm systems had on lakes along the storm tracks from the Atlantic coast inland through our region. We collected data on the thermal stratification and ecosystem metabolism. We published these results in a 2012 paper in Environmental Science and Technology (Klug et al. 2012). We have now published the data for anyone to explore or further analyze. It is available through the Environmental Data Initiative at the link below.
Klug J. L., D. C. Richardson, H. A. Ewing, B. R. Hargreaves, N. R. Samal, D. Vachon, D. C. Pierson, B. G. Steele, D. M. O’Donnell, S. W. Effler, P. A. del Giorgio, K. C. Weathers. 2019. High-frequency water temperature and dissolved oxygen data and derived stability and metabolism metrics for nine lakes in northeastern North America for months before and after Tropical Cyclone Irene, Fall 2011. Environmental Data Initiative. https://doi.org/10.6073/pasta/7684d5140f6ef95b97763c6ba50d208b.
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Here are two new data publications out of the Mohonk Preserve Daniel Smiley Research Center (DSRC) in collaboration with my lab. The publications came about as a result of the NSF-funded internship I co-hosted along with the DSRC. This internship is part of the Environmental Data Initiative (EDI), a web-based data portal and data infrastructure program that was designed to help support the information produced through environmental research. Our EDI intern, Vanessa Morgan (SUNY NP student), received training on-site at EDI in the beginning of the summer before returning to New Paltz to start working with the DSRC data. Data from the precipitation depths and pH publication are published in Richardson et al. (2018, see Publications).
Mohonk Preserve, C. Belardo, N. Feldsine, A. Forester, P. Huth, E. Long, V. Morgan, M. Napoli, E. Pierce, D. Richardson, D. Smiley, S. Smiley, J. Thompson. 2018. History of Acid Precipitation on the Shawangunk Ridge: Mohonk Preserve Precipitation Depths and pH, 1976 to Present. Environmental Data Initiative. https://doi.org/10.6073/pasta/734ea90749e78613452eacec489f419c
We recently held our 4th annual NE GLEON meeting at the Cary Institute, Apr 2018. This conference brings together researchers and students from all over northeastern North America to present science, discuss professional development, plan experiments, and more. Three of my SUNY New Paltz research students, Kayla Reid (Biochemistry ’18), Hailee Edwards (Biology ’18), and Heather Wander (Biology ’18) wrote a post about it for the GLEON blog (click here for the post).
Paul Hanson, GLEON co-chair, said “The blog highlights major landmark achievements over its course of three years and share experiences of the juvenile limnologist whom we will see in the near future representing GLEON and managing lake resources in the world. I hope and bet that you’ll enjoy reading the blog written by Hailee Edwards, Heather Wander and Kayla Reid (undergrad students)…”
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I am the lead author of a new paper titled “Watershed management and underlying geology in three lakes control divergent responses to decreasing acid precipitation,” which was published in the journal Inland Waters. The paper was a collaborative effort between SUNY New Paltz and the Mohonk Preserve. The manuscript included five SUNY New Paltz undergraduate co-authors, all funded through SUNY New Paltz Research, Scholarship, and Creative Activities (RSCA): David Charifson (Biology ’13), Bobbetta Davis (Biology ’16), Matthew Farragher (Environmental Geochemical Sciences ’16), Bryan Krebs (Biology ’15), and Brian Wilcove (Biology ’16).
We examined patterns of acidity in rain and three Sky Lakes on the Shawangunk Ridge (Lake Minnewaska, Lake Awosting, and Mohonk Lake). We found that rain water is improving over the last 40 years with decreasing acidity. However, the three lakes have had very different responses despite being close together. Lake Awosting is improving slowly – this matches decreasing rain acidity directly. Mohonk Lake has always been close to neutral because of exposed shale under the lake. Lake Minnewaska gone from acidic to almost neutral because of improving rain acidity and eroding shale recreational trails around the lake. In these lakes and around the world, the rate of recovery from acid rain can affect the return of acid-sensitive freshwater organisms.