A bioregional classification of the continental shelf of northeastern North America for conservation analysis and planning based on representation

Understanding how well National Marine Sanctuaries and other marine protected areas represent the diversity of species present within and among the biogeographic regions where they occur is essential for assessing their conservation value and identifying gaps in the protection of biological diversity. One of the first steps in any such assessment should be the development of clearly defined and scientifically justified planning boundaries representing distinct oceanographic conditions and faunal assemblages. Here, we propose a set of boundaries for the continental shelf of northeastern North America defined by subdivisions of the Eastern Temperate Province, based on a review and synthesis (i.e. meta-analysis) of the scientific literature. According to this review, the Eastern Temperate Province is generally divided into the Acadian and Virginian Subprovinces. Broad agreement places the Scotian Shelf, Gulf of Maine, and Bay of Fundy within the Acadian Subprovince. The proper association of Georges Bank is less clear; some investigators consider it part of the Acadian and others part of the Virginian. Disparate perspectives emerge from the analysis of different groups of organisms. Further, while some studies suggest a distinction between the Southern New England shelf and the rest of the Mid-Atlantic Bight, others describe the region as a broad transition zone with no unique characteristics of its own. We suggest there exists sufficient evidence to consider the Scotian Shelf, Gulf of Maine, Georges Bank, Southern New England, and Southern Mid-Atlantic Bight as distinct biogeographic regions from a conservation planning perspective, and present a set of proposed mapped boundaries. (PDF contains 23 pages.

Economic evaluation of crop acreage estimation by multispectral remote sensing

The author has identified the following significant results. Photointerpretation of S190A and S190B imagery showed significantly better resolution with the S190B system. A small tendancy to underestimate acreage was observed. This averaged 6 percent and varied with field size. The S190B system had adequate resolution for acreage measurement but the color film did not provide adequate contrast to allow detailed classification of ground cover from imagery of a single date. In total 78 percent of the fields were correctly classified but with 56 percent correct for the major crop, corn

Case-control geographic clustering for residential histories accounting for risk factors and covariates

BACKGROUND: Methods for analyzing space-time variation in risk in case-control studies typically ignore residential mobility. We develop an approach for analyzing case-control data for mobile individuals and apply it to study bladder cancer in 11 counties in southeastern Michigan. At this time data collection is incomplete and no inferences should be drawn – we analyze these data to demonstrate the novel methods. Global, local and focused clustering of residential histories for 219 cases and 437 controls is quantified using time-dependent nearest neighbor relationships. Business address histories for 268 industries that release known or suspected bladder cancer carcinogens are analyzed. A logistic model accounting for smoking, gender, age, race and education specifies the probability of being a case, and is incorporated into the cluster randomization procedures. Sensitivity of clustering to definition of the proximity metric is assessed for 1 to 75 k nearest neighbors. RESULTS: Global clustering is partly explained by the covariates but remains statistically significant at 12 of the 14 levels of k considered. After accounting for the covariates 26 Local clusters are found in Lapeer, Ingham, Oakland and Jackson counties, with the clusters in Ingham and Oakland counties appearing in 1950 and persisting to the present. Statistically significant focused clusters are found about the business address histories of 22 industries located in Oakland (19 clusters), Ingham (2) and Jackson (1) counties. Clusters in central and southeastern Oakland County appear in the 1930's and persist to the present day. CONCLUSION: These methods provide a systematic approach for evaluating a series of increasingly realistic alternative hypotheses regarding the sources of excess risk. So long as selection of cases and controls is population-based and not geographically biased, these tools can provide insights into geographic risk factors that were not specifically assessed in the case-control study design

Notes on the Nests of \u3ci\u3eAugochloropsis metallica fulgida\u3c/i\u3e and \u3ci\u3eMegachile mucida\u3c/i\u3e in Central Michigan (Hymenoptera: Halictidae, Megachilidae)

Notes on the nesting biology of two ground-nesting species are provided from Central Michigan. A single nest of Augochloropsis metallica fulgida was excavated on 12 July 2014 in Shiawassee County. There were two female nest inhabitants. Examination of mandibular wear, wing wear and ovarial development suggests one female was acting as a worker caste. Also, a nesting aggregation of Megachile mucida was observed in Ingham County. Information on nest architecture and cell construction is based on excavations of several nests during 7–15 June 2014. Megachile mucida is recorded as a new host species for the cleptoparasite Coelioxys sodalis. This is the first record of M. mucida in Michigan, additional collection records of this species in Michigan are also reported

Studies of recognition with multitemporal remote sensor data

Characteristics of multitemporal data and their use in recognition processing were investigated. Principal emphasis was on satellite data collected by the LANDSAT multispectral scanner and on temporal changes throughout a growing season. The effects of spatial misregistration on recognition performance with multitemporal data were examined. A capability to compute probabilities of detection and false alarm was developed and used with simulated distributions for misregistered pixels. Wheat detection was found to be degraded and false alarms increased by misregistration effects. Multitemporal signature characteristics and multitemporal recognition processing were studied to gain insights into problems associated with this approach and possible improvements. Recognition performance with one multitemporal data set displayed marked improvements over results from single-time data

The only known cyclopygid–‘atheloptic’ trilobite fauna from North America: the upper Ordovician fauna of the Pyle Mountain Argillite and its palaeoenvironmental significance

The trilobite fauna of the upper Ordovician (middle Katian) Pyle Mountain Argillite comprises a mixture of abundant mesopelagic cyclopygids and other pelagic taxa and a benthic fauna dominated by trilobites lacking eyes. Such faunas were widespread in deep water environments around Gondwana and terranes derived from that continent throughout Ordovician time but this is the only known record of such a fauna from North America and thus from Laurentia. It probably reflects a major sea level rise (the ‘Linearis drowning events’) as does the development of coeval cyclopygid-dominated deep water trilobite faunas in terranes that were marginal to Laurentia and are now preserved in Ireland and Scotland. The Pyle Mountain Argillite trilobite fauna occurs with a deep water Foliomena brachiopod fauna and comprises 22 species. Pelagic trilobites (mostly cyclopygids) constitute 36% of the preserved sclerites, and 45% of the fauna is the remains of trilobites lacking eyes, including one new species, Dindymene whittingtoni sp. nov. Three species of cyclopygid are present, belonging in Cyclopyge, Symphysops and Microparia (Heterocyclopyge). Cyclopygids are widely thought to have been stratified in the water column in life and thus their taxonomic diversity reflects the relative depths of the sea-beds on which their remains accumulated. A tabulation of middle and upper Katian cyclopygid-bearing faunas from several palaeoplates and terranes arranged on the basis of increasing numbers of cyclopygid genera allows an assessment of the relative depth ranges of the associated benthic taxa. The Pyle Mountain Argillite fauna lies towards the deeper end of this depth spectrum

Geochemical fingerprinting of volcanic airfall deposits: A tool in stratigraphic correlation

Chemical fingerprints of volcanic airfall deposits obtained from high-precision electron microprobe analysis of glass and phenocrysts phases provide geochemical correlations with temporal precision unattainable by other methods. In this research electron microprobe analysis (EMA) techniques, to fingerprint chemically and correlate fresh and altered volcanic airfall deposits, have been utilized to test the value of this tool for future research on stratigraphic correlation. The following samples were chosen from within a variety of sedimentary rocks widely separated spatially and temporally: (1) ∼450 Ma old upper Middle Ordovician K-bentonites (altered volcanic airfall deposits) collected from eastern United States. (2) Relatively fresh Pleistocene tuff from ∼74 ka old Youngest Toba Tuff (YTT) eruption in Sumatra (Indonesia). (3) Fresh Pleistocene volcanic ash from India, and Sulu Sea ODP cores. This research confirms 14 K-bentonite correlations, of which 10 are reported for the first time, based on chemical compositions of apatite phenocrysts and melt inclusions in quartz phenocrysts. Significant K-bentonite research findings include: (1) Chemical correlation of Hounsfield K-bentonite and the Millbrig K-bentonite. (2) Several new chemical correlations of K-bentonite beds from within the Ordovician rocks in Taconic foreland basin. (3) Melt inclusion chemistry might be the more effective tool for differentiating closely spaced K-bentonites than that of apatite. Biotite phenocrysts, melt inclusions in quartz and plagioclase phenocrysts, and glass shard chemistry of proximal and distal YTT ash successfully discriminate it with other closely spaced ash layers. This research reports for the first time, the presence of melt inclusion bearing plagioclase from Pleistocene volcanic ash from India and correlates it chemically to the YTT. The Pleistocene ash from Sulu Sea ODP was not produced by YTT eruption. The best discriminating elements observed are: (1) Toba biotites - Mn, Ti, Cl, Mg and Fe. (2) Ordovician apatites - Mn, Mg, Fe, Cl, and F (new finding). (3) Melt inclusions and glass shards - Ca, Fe, Mg, Mn, Cl, Ti, K and Na. Using a dual approach, i.e., glass as well as phenocryst chemical signatures, makes a better tool for differentiating or correlating vertically closely spaced or geographically widely spaced volcanic airfall deposits

Fighting Poverty with Passion: AmeriCorps VISTA as a Replicable Solution to Local Poverty

This study examines the replicability and effectiveness of AmeriCorps VISTA projects in fighting poverty at the state and local levels. AmeriCorps VISTA (Volunteers in Service to America) is the chief domestic program of the Federal Government\u27s Corporation for National and Community Service. The scope of this study focuses on the seven states that comprise the Corporation\u27s North Central Cluster, (Illinois, Indiana, Iowa, Michigan, Minnesota, Ohio, and Wisconsin) and the AmeriCorps VISTA projects that operated in these states due to funding from the 2009 American Recovery and Reinvestment Act. The selected region offers a microcosm of the nation\u27s geographical and political diversity, while the selected time frame demonstrates what AmeriCorps VISTA projects could accomplish at a time of strong federal support. Ultimately, the results of this study are presented from two angles; by project focus and by state, with states ranking on a performance scale from high performing to failing

Fighting Poverty with Passion: AmeriCorps VISTA as a Replicable Solution to Local Poverty

This study examines the replicability and effectiveness of AmeriCorps VISTA projects in fighting poverty at the state and local levels. AmeriCorps VISTA (Volunteers in Service to America) is the chief domestic program of the Federal Government\u27s Corporation for National and Community Service. The scope of this study focuses on the seven states that comprise the Corporation\u27s North Central Cluster, (Illinois, Indiana, Iowa, Michigan, Minnesota, Ohio, and Wisconsin) and the AmeriCorps VISTA projects that operated in these states due to funding from the 2009 American Recovery and Reinvestment Act. The selected region offers a microcosm of the nation\u27s geographical and political diversity, while the selected time frame demonstrates what AmeriCorps VISTA projects could accomplish at a time of strong federal support. Ultimately, the results of this study are presented from two angles; by project focus and by state, with states ranking on a performance scale from high performing to failing

AGGLOMERATION ECONOMIES, INVESTMENT IN EDUCATION, AND REGIONAL DEVELOPMENT

This dissertation consists of two essays that study the linkages among agglomeration economies, investment in education, and regional development. In the first essay, I study the impact of a federal educational investment on various aspects of local economies. In the second essay, I examine the spillover effects among workers with different skills, which are identified by their college majors. The first essay presents evidence of direct spillovers from universities and examines the short- and long-run effects of university activities on geographic clustering of economic activity, labor market composition and local productivity. I treat the designation of land-grant universities as a natural experiment after controlling for the confounding factors with a combination of synthetic control methods and event-study analyses. Three key results are obtained. First, the designation substantially increased local population density. Second, the share of manufacturing workers in the population, an indicator of labor market composition, was not affected by the designation. Third, the designation greatly enhanced local manufacturing productivity, as measured by local manufacturing output per worker, especially in the long run. This positive effect on the productivity in non-education sectors suggests the existence of spillovers from universities. Over an 80-year horizon, I estimate that most of the increase in manufacturing productivity was because of direct spillovers from universities instead of induced agglomeration economies that arise from the increase in population. The second essay studies the manner and extent to which worker skill type affects agglomeration economies that contribute to productivity in cities. I use college major to proxy for skill type among workers with a Bachelor\u27s degree. Workers with college training in information-oriented and technical fields (e.g. STEM areas such as Engineering, Physical Sciences, and Economics) are associated with economically important within-field agglomeration economies and also generate sizeable spillovers for workers in other fields. In contrast to related work by Florida (2002a, 2002b), within-field and across-field spillovers for workers with college training in the arts and humanities are much smaller and often non-existent. While previous research suggests proximity to college-educated workers enhances productivity, these findings suggest that not all college educated workers are alike. Instead, positive spillover effects appear to derive mostly from proximity to workers with training in information-oriented and technical fields