Fifth Graders\u27 Enjoyment, Interest, and Comprehension of Graphic Novels Compared to Heavily-Illustrated and Traditional Novels

The comparative effectiveness of graphic novels, heavily illustrated novels, and traditional novels as reading teaching tools has been sparsely researched. During the 2011-2012 school year, 24 mixed-ability fifth grade students chose to read six novels: two traditional novels, two highly illustrated novels and two graphic novels. Students participated in discussion groups structured with thinking skills, and completed assignments during and after reading the books. Student comprehension and enjoyment were measured by rubric-graded assignments and rating scales. The numbers of student responses during discussions per type of novel were tabulated. The graphic novel received the highest scores in all categories. The researchers conclude that graphic novels be considered an engaging and effective method of teaching reading to fifth graders

Small Mammal Jointed Models to Make, Description Cards, and a Menu of Follow-on Activities in Different Intelligence Areas

Instilling an appreciation of nature in our youth is an important precursor to environmental protection and support for sustainability. Research has shown that involving students in environmental projects improves their motivation, skills, and achievement on standardized tests, This document contains images of the body parts of small mammals with directions for reproducing, cutting, gluing, and assembling them (with paper fasteners) into life-size jointed models of the animals. There are two distinct versions (different color phases and poses) of each of 11 small mammals that generally live in grasslands, along creeks/ponds, or woodland edges of Midwestern habitats: Eastern Chipmunk, Franklin’s Ground Squirrel, Eastern Mole, Plains Pocket Gopher, Thirteen Lined Ground Squirrel, Northern Short Tailed Shrew, Southern Bog Lemming, Meadow Vole, Meadow Jumping Mouse, Deer Mouse, and Northern Grasshopper Mouse. A set of card fronts and backs gives facts about each of the animals (to be matched to the corresponding jointed models) with an image of the correct animal on the reverse side for selfchecking. The main lesson activity is explained and presented as a learning cycle. A menu of authentic activities that would make meaningful follow-on activities in the last phase of the learning cycle, the expansion phase, is presented. These are sorted into different multiple intelligence areas to provide student choice and differentiation of instruction. Each activity is accompanied with objective, instructions, rationale of how the activity is an authentic task, criteria for evaluation and an example correct response to the activity. [50 Figures; 12 References; Appendix with 20 pages of additional figures

Forecasting the distribution of the invasive round goby (Neogobius melanostomus) in Wisconsin tributaries to Lake Michigan

Abstract: The Laurentian Great Lakes host more than 180 non-native species, including several that have resulted in major economic and ecological effects. This list includes the round goby (Neogobius melanostomus), an aggressive, benthic Ponto-Caspian fish that has established large populations in coastal Great Lakes habitats. Here, we document the inland dispersal of round gobies into Wisconsin tributaries of Lake Michigan. Round gobies were detected in 26 of 73 streams (36%) and found >10 km upstream of Lake Michigan in nine watersheds. Round goby presence-absence was modeled using landscape-scale data from these invaded streams. We forecasted the future spread of round goby within Wisconsin's Lake Michigan basin using our best model (80% accuracy), which included watershed area, stream gradient, and watershed slope as predictors. Round gobies were predicted to invade 1369 km of stream habitat up to the first stream barrier, and 8878 km of stream was identified as suitable looking beyond barriers at the broader Lake Michigan watershed (Wisconsin only). Our results depict the Great Lakes as a springboard for invasive species to disperse into inland ecosystems and, because round gobies are not usually reported in small streams in their native range, emphasize the utility of data from invaded regions when forecasting invasive species distributions. Résumé : Les Grands Lacs Laurentiens contiennent >180 espèces non indigènes dont plusieurs ont eu des effets économi-ques et écologiques importants. Cette liste comprend le gobie à taches noires (Neogobius melanostomus), un poisson agressif d'origine ponto-caspienne, qui a formé de grandes populations dans les habitats côtiers des Grands Lacs. Nous apportons des informations sur la dispersion vers l'intérieur des gobies à taches noires dans les tributaires du lac Michigan au Wisconsin. Les gobies à taches noires se retrouvent dans 26 de 73 cours d'eau (36 %) et à >10 km en amont du lac Michigan dans neuf bassins versants. Nous avons modélisé la présence-absence des gobies à taches noires à l'aide de données à l'échelle du paysage provenant des cours d'eau envahis. Nous prédisons la dispersion future du gobie à taches noires dans le bassin versant du lac Michigan au Wisconsin à l'aide de notre meilleur (80 % d'exactitude) modèle qui inclut la surface du bassin versant, le gradient du cours d'eau et la pente du bassin comme variables prédictives. Notre pré-diction est que les gobies à taches noires vont envahir 1369 km d'habitat lotique jusqu'à la première barrière dans les cours d'eau; de plus, 8878 km de cours d'eau au-delà des barrières paraissent des habitats convenables dans le bassin élargi du lac Michigan (dans le seul Wisconsin). Nos résultats décrivent les Grands Lacs comme des tremplins pour les espèces envahissantes vers les écosystèmes de l'intérieur; comme les gobies à taches noires ne se retrouvent pas générale-ment dans les petits cours d'eau dans leur aire de répartition indigène, nos résultats soulignent l'utilité de données provenant des régions envahies pour la prédiction des répartitions des espèces envahissantes. [Traduit par la Rédaction

Historical and contemporary trophic niche partitioning among Laurentian Great Lakes coregonines

Abstract. Anthropogenic activities have significantly altered freshwater fish communities. Extirpations of deepwater coregonines (Coregonus spp.), a diverse group of fish species, have left vast areas of the Laurentian Great Lakes devoid of a deepwater fish community. Currently, fisheries managers are considering restoring populations by reintroducing deepwater coregonines from Lake Superior and Lake Nipigon. However, little is known about the historical ecology of deepwater coregonines, and species characterization has proved difficult. We used stable isotope analysis of museum-preserved and contemporary specimens to investigate if (1) coregonine species historically occupied distinct niches and (2) the pattern of trophic niche partitioning has changed over the last century. Across all lakes, individual species occupied distinct trophic niches, confirming that these species were ecologically distinct. Understanding trophic niche partitioning helps resolve uncertainty about distinctness of species within and across lakes and may provide a better ecological basis for rehabilitation of Great Lakes food webs and ecosystems

Taking the trophic bypass : aquatic-terrestrial linkage reduces methylmercury in a terrestrial food web

Ecosystems can be linked by the movement of matter and nutrients across habitat boundaries via aquatic insect emergence. Aquatic organisms tend to have higher concentrations of certain toxic contaminants such as methylmercury (MeHg) compared to their terrestrial counterparts. If aquatic organisms come to land, terrestrial organisms that consume them are expected to have elevated MeHg concentrations. But emergent aquatic insects could have other impacts as well, such as altering consumer trophic position or increasing ecosystem productivity as a result of nutrient inputs from insect carcasses. We measure MeHg in terrestrial arthropods at two lakes in northeastern Iceland and use carbon and nitrogen stable isotopes to quantify aquatic reliance and trophic position. Across all terrestrial focal arthropod taxa (Lycosidae, Linyphiidae, Acari, Opiliones), aquatic reliance had significant direct and indirect (via changes in trophic position) effects on terrestrial consumer MeHg. However, contrary to our expectations, terrestrial consumers that consumed aquatic prey had lower MeHg concentrations than consumers that ate mostly terrestrial prey. We hypothesize that this is due to the lower trophic position of consumers feeding directly on midges relative to those that fed mostly on terrestrial prey and that had, on average, higher trophic positions. Thus, direct consumption of aquatic inputs results in a trophic bypass that creates a shorter terrestrial food web and reduced biomagnification of MeHg across the food web. Our finding that MeHg was lower at terrestrial sites with aquatic inputs runs counter to the conventional wisdom that aquatic systems are a source of MeHg contamination to surrounding terrestrial ecosystems

Taking the trophic bypass: aquatic-terrestrial linkage reduces methylmercury in a terrestrial food web

Abstract. Ecosystems can be linked by the movement of matter and nutrients across habitat boundaries via aquatic insect emergence. Aquatic organisms tend to have higher concentrations of certain toxic contaminants such as methylmercury (MeHg) compared to their terrestrial counterparts. If aquatic organisms come to land, terrestrial organisms that consume them are expected to have elevated MeHg concentrations. But emergent aquatic insects could have other impacts as well, such as altering consumer trophic position or increasing ecosystem productivity as a result of nutrient inputs from insect carcasses. We measure MeHg in terrestrial arthropods at two lakes in northeastern Iceland and use carbon and nitrogen stable isotopes to quantify aquatic reliance and trophic position. Across all terrestrial focal arthropod taxa (Lycosidae, Linyphiidae, Acari, Opiliones), aquatic reliance had significant direct and indirect (via changes in trophic position) effects on terrestrial consumer MeHg. However, contrary to our expectations, terrestrial consumers that consumed aquatic prey had lower MeHg concentrations than consumers that ate mostly terrestrial prey. We hypothesize that this is due to the lower trophic position of consumers feeding directly on midges relative to those that fed mostly on terrestrial prey and that had, on average, higher trophic positions. Thus, direct consumption of aquatic inputs results in a trophic bypass that creates a shorter terrestrial food web and reduced biomagnification of MeHg across the food web. Our finding that MeHg was lower at terrestrial sites with aquatic inputs runs counter to the conventional wisdom that aquatic systems are a source of MeHg contamination to surrounding terrestrial ecosystems

Shorter Food Chain Length in Ancient Lakes: Evidence from a Global Synthesis

Food webs may be affected by evolutionary processes, and effective evolutionary time ultimately affects the probability of species evolving to fill the niche space. Thus, ecosystem history may set important evolutionary constraints on community composition and food web structure. Food chain length (FCL) has long been recognized as a fundamental ecosystem attribute. We examined historical effects on FCL in large lakes spanning >6 orders of magnitude in age. We found that food chains in the world’s ancient lakes (n = 8) were significantly shorter than in recently formed lakes (n = 10) and reservoirs (n = 3), despite the fact that ancient lakes harbored much higher species richness, including many endemic species. One potential factor leading to shorter FCL in ancient lakes is an increasing diversity of trophic omnivores and herbivores. Speciation could simply broaden the number of species within a trophic group, particularly at lower trophic levels and could also lead to a greater degree of trophic omnivory. Our results highlight a counter-intuitive and poorly-understood role of evolutionary history in shaping key food web properties such as FCL

Fish community composition and habitat use in the Eg-Uur River System,

Abstract Mongolian rivers and their fi sh communities have suffered severe impacts from anthropogenic activities. However, the remoteness of some systems has allowed for the conservation of unique fi sh faunas, including robust populations of Hucho taimen. Conservation of H. taimen requires understanding the composition and ecology of other fi shes in the community. Using multiple sampling techniques, direct observation, and existing literature, we assessed the composition, relative abundance, and ecological attributes of fi shes in the Eg-Uur watershed (Selenge basin). We collected 6 of 12 species known in the watershed. Phoxinus cf. phoxinus and Lota lota were the most and least abundant species, respectively. We failed to detect H. taimen, indicating low abundance or unknown habitat requirements for juveniles. We compared the effectiveness of different sampling techniques (with electrofi shing producing the highest species richness), constructed length-weight relationships for four species, and identifi ed ecological attributes (i.e., trophic guild, preferred habitat) for resident fi shes

Fish community composition and habitat use in the Eg-Uur River System,

Abstract Mongolian rivers and their fi sh communities have suffered severe impacts from anthropogenic activities. However, the remoteness of some systems has allowed for the conservation of unique fi sh faunas, including robust populations of Hucho taimen. Conservation of H. taimen requires understanding the composition and ecology of other fi shes in the community. Using multiple sampling techniques, direct observation, and existing literature, we assessed the composition, relative abundance, and ecological attributes of fi shes in the Eg-Uur watershed (Selenge basin). We collected 6 of 12 species known in the watershed. Phoxinus cf. phoxinus and Lota lota were the most and least abundant species, respectively. We failed to detect H. taimen, indicating low abundance or unknown habitat requirements for juveniles. We compared the effectiveness of different sampling techniques (with electrofi shing producing the highest species richness), constructed length-weight relationships for four species, and identifi ed ecological attributes (i.e., trophic guild, preferred habitat) for resident fi shes