Spring 2015 Resources and Publications

Characterization of Chironomidae (Diptera) Surface-Floating Pupal Exuviae Sample Sort Time from Coastal Tropical Aquatic Systems
Kranzfelder, P. and L.C. Ferrington, Jr.
2015. Environmental Monitoring and Assessment 87(3): 1-8.
Many studies either ignore chironomids or only identify specimens to subfamily or tribe due to the associated difficulty and high cost with processing and identifying larvae. An efficient form of sampling chironomids involves collections of surface-floating pupal exuviae (SFPE). SFPE sample sorting has been shown to be more time efficient than traditional dip-net methods in temperate urban and peri-urban streams.

Survivorship and longevity of adult Diamesa mendotae Muttkowski, 1915 (Diptera: Chironomidae) at controlled, sub-freezing temperatures

Mazack J. E., P. Kranzfelder, A. M. Anderson, R. W. Bouchard, J. Perry, B. Vondracek, and L. C. Ferrington. 2015. Aquatic Insects: 1-8.
Our results indicate that overall survivorship is negatively related to treatment duration of sub-freezing treatment, individuals can survive sub-freezing temperatures for at least 70 days, with total longevity of 92 days. Additionally, males had a significantly higher rate of survivorship than females within treatments. Total longevity increased with treatment time, suggesting adult D. mendotae may survive long periods of below-freezing temperatures under natural conditions before mating, which may convey population-level advantages.

Differential Efficiencies of Dip-Net Sampling Versus Sampling Surface-Floating Pupal Exuviae in a Biodiversity Survey of Chironomidae

Ferrington L. C. and W. P. Coffman. 2014. CHIRONOMUS Newsletter on Chironomidae Research 27: 31-40.
Relative efficiencies of standard dip-net sampling (SDN) versus collections of surface-floating pupal exuviae (SFPE) were determined for detecting Chironomidae at catchment and site scales and at subfamily/tribe-, genus- and species-levels based on simultaneous, equal-effort sampling on a monthly basis for one year during a biodiversity assessment of Bear Run Nature Reserve. Results showed SFPE was more efficient than SDN at catchment scales for detecting both genera and species

Factors Affecting Decomposition Rates of Chironomid (Diptera) Pupal Exuviae

Kavanaugh R. G., A. T. Egan, and L. C. Ferrington. 2014.
CHIRONOMUS Newsletter on Chironomidae Research 27: 16-24.
Collections of floating chironomid pupal exuviae are used to monitor water quality and assess ecological conditions. Factors controlling exuviae sinking rates are not well known, although they should have an effect on conclusions that can be drawn from collections. The current study was conducted to determine the rate of sinking under controlled laboratory conditions using water from three streams with different nutrient levels.

Spatial arrangement and metrics of freshwater coastal rock pools applied to amphibian conservation

Egan A. T., L. C. Ferrington Jr, T. Lafrançois, M. B. Edlund, and J. McCullough. 2015.
Limnologica – Ecology and Management of Inland Waters 51: 101-109.
Coastal habitats are an ecotone between aquatic and terrestrial ecosystems. Depressions on volcanic bedrock shores of Lake Superior form small pool habitats that are influenced to various degrees by their spatial context and that relate to differences in mechanisms of disturbance. A total of 71,931 coastal pools were mapped and measured, and amphibian occupants were identified along 48 km of shoreline at Isle Royale National Park, where coastal rock pool habitats were abundant.

is a web application for viewing, printing and downloading high-resolution elevation data for the State of Minnesota that was collected using LiDAR technology. It runs on a variety of devices including desktop PCs, tablets, and mobile phones.
MnTOPO data and downloads are made possible by the Minnesota elevation mapping project.

Minnesota Weather Almanac (second edition)

Mark W. Seeley, April 2015. Minnesota Historical Society Press
This book is organized by season and showcases a wide variety of data and lore from weather and climate episodes of the past. It also features stories about people and events related to the state's rich weather history. Maps, tables, and graphics serve to convey the important data, and several historical photos illustrate important events. The last chapter of the book deals with the evidence for climate change and its consequences in our state. 344 pages.

The WDCP Calendar for 2015 workshops is live: www.mnwetlands.umn.edu/trainingcourses/index.htm