The American Midland Naturalist Journal Impact Factor & Information

Publisher: University of Notre Dame

Current impact factor: 0.77

Impact Factor Rankings

2015 Impact Factor Available summer 2016
2014 Impact Factor 0.773
2013 Impact Factor 0.621
2012 Impact Factor 0.667
2011 Impact Factor 0.619
2010 Impact Factor 0.526
2009 Impact Factor 0.665
2008 Impact Factor 0.755
2007 Impact Factor 0.722
2006 Impact Factor 0.667
2005 Impact Factor 0.768
2004 Impact Factor 0.677
2003 Impact Factor 0.701
2002 Impact Factor 0.585
2001 Impact Factor 0.494
2000 Impact Factor 0.452
1999 Impact Factor 0.5
1998 Impact Factor 0.544
1997 Impact Factor 0.485
1996 Impact Factor 0.564
1995 Impact Factor 0.531
1994 Impact Factor 0.404
1993 Impact Factor 0.5
1992 Impact Factor 0.453

Impact factor over time

Impact factor

Additional details

5-year impact 0.82
Cited half-life >10.0
Immediacy index 0.10
Eigenfactor 0.00
Article influence 0.30
Other titles American midland naturalist (Online), The American midland naturalist
ISSN 1938-4238
OCLC 45446837
Material type Document, Periodical, Internet resource
Document type Internet Resource, Computer File, Journal / Magazine / Newspaper

Publications in this journal

  • The American Midland Naturalist 01/2016; In Press.
  • [Show abstract] [Hide abstract]
    ABSTRACT: The northern Great Plains of North America provides critical breeding habitat for many colonial tree-nesting waterbirds, but reproductive success and population parameters for these species are largely unknown within the Prairie Pothole Region, specifically in South Dakota. The objective of this study was to evaluate reproductive success of colonial tree-nesting waterbirds on selected wetlands and rivers in northeast South Dakota. During the 2008 and 2009 breeding seasons, nesting and fledging success of Black-crowned Night-Heron (Nycticorax nycticorax), Great Blue Heron (Ardea herodias), Cattle Egret (Bubulcus ibis), Great Egret (A. alba), Snowy Egret (Egretta thula), and Double-crested Cormorant (Phalacrocorax auritus) were estimated in 39 individual colonies. A total of 2551 individual nests were monitored from 15 Apr.-15 Aug. in 2008 and 2009. Overall apparent nest and fledge success (respectively) were: Black-crowned Night-Heron (52.1%, 47.9%), Great Blue Heron (58.2%, 35.9%), Cattle Egret (73.1%, 69.2%), Great Egret (61.5%, 50.7%), Snowy Egret (83.6%, 81.7%), and Double-crested Cormorant (70.4%, 54.2%). Nest abandonment accounted for an average of 47.6% of nest failures for all species combined. Nest structure failure and young dying within nests accounted for most failures to fledge. Nesting success increased with the area of wetland habitat in the landscape for all species analyzed. Lower reproductive success of Black-crowned Night-Heron and Great Blue Heron, compared to other findings across the U.S. and Canada, suggests that these breeding populations in northeast South Dakota may be declining. Cattle Egret, Great Egret, Snowy Egret, and Double-crested Cormorant reproductive success is relatively high in northeast South Dakota compared to other North American populations. Preserving and restoring wetland habitat surrounding waterbird colonies will provide successful nesting habitat as well as foraging areas and opportunities for new colony site locations.
    The American Midland Naturalist 07/2015; 2015(174):132-149. DOI:10.1674/0003-0031-174.1.132
  • [Show abstract] [Hide abstract]
    ABSTRACT: ABSTRACT.–––To determine if manipulation of milkweed’s natural phenology would increase monarch reproduction, strips were mowed in fields in upstate New York in early Jul, late Jul, and mid Aug, 2006, for comparison to an unmowed control. Common milkweed (Asclepias syriaca) was then monitored from Jul 29 through Sep 24 for plant height, vegetative stage, level of herbivory, condition, monarch eggs and larvae, and the position of eggs on leaves and stems. We found that mowing on Jul 1 and 24 spurred the regrowth of milkweed and sustained a more continuously suitable habitat for monarch oviposition and larval development than the control. Mowing on Aug 17 proved too late for recovery of the milkweeds. Significantly more eggs were laid on the fresh resprouted milkweeds than on the older and taller control plants. In the strips mowed on Jul 1, peak egg densities occurred in late Jul; in the strips mowed in late Jul, peak egg densities occurred in early to mid Aug. Depending on the timing of mowing, the milkweed plant height, developmental stage, and condition differed. As predicted, the mowing of fields with Asclepias syriaca extended the monarchs' breeding season and increased overall monarch reproduction. However, timing of mowing was critical and must be determined empirically for different milkweed species and in different locations. This mitigation procedure could be fostered along roadsides, along edges of fields and pastures, in USDA conservation reserve program lands, and along power lines and other rights of way.
    The American Midland Naturalist 01/2015; 173:229-240.
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    ABSTRACT: River modifications have had detrimental effects on biota that depend on river systems; therefore, information is needed to understand these effects and direct management efforts. Channel catfish (Ictalurus punctatus) are important recreationally, commercially, and ecologically in the Middle Mississippi River (MMR), but few studies have examined their habitat requirements, and food habits have not been evaluated in the MMR. Information about habitat use and food habits could help direct management efforts for channel catfish. To more thoroughly understand the synergistic relation between channel catfish and the associated habitat, we used data from the United States Army Corps of Engineer’s Long-Term Resource Monitoring Program to evaluate channel catfish use of large-scale river features (i.e., macrohabitats) and more fine scale mesohabitats (i.e., substrate type, depth, and velocity). Stomach contents from channel catfish were identified and quantified to determine the relative importance of specific prey items in diets. Channel catfish presence was positively affected by current, but negatively affected by depth. Off-channel habitats appeared more suitable for channel catfish. In terms of food habits, Cambaridae, fish, and vegetation were most frequently found in the diet, but a variety of other food items were consumed. Conserving pre-modification habitat characteristics, such as open side channels, shallow sandbars, and seasonally inundated floodplains, as well as habitats with high forage productivity, should help to sustain a stable population of channel catfish in the MMR. Future studies could examine the tenets of the optimal foraging theory within these habitats to determine the mechanisms regulating channel catfish habitat use and prey selection.
    The American Midland Naturalist 01/2015;
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    ABSTRACT: Celastrus orbiculatus Thunb. (Oriental bittersweet) is an invasive exotic liana introduced to western North Carolina in the late 1800s that has established in forests across the southern Appalachian region. The twining habit of bittersweet is recognized to have negative impacts on tree growth by constricting trunks, overtopping canopies, and increasing the probability of wind and ice damage. Our study was designed to quantify effects of invasion by C. orbiculatus on Liriodendron tulipifera (tulip poplar) growth. We cored trees on invaded sites with both twined and untwined trees to test for above and below ground competition effects of C. orbiculatus and compared growth to nearby uninvaded sites. Contrary to our expectations, we found radial growth increased after invasion. This increase is likely a release response from a disturbance that allowed C. orbiculatus to become establised. There were many historical ice storms that occured in our region during the time of C. orbiculatus invasion that may have helped it to become established in these stands. Liriodendron tulipifera are known to respond positively after ice storm thinning and this release may mask any initial negative effects of liana competition. The short duration of our study may not have been long enough to capture the transition from the effect of canopy release due to disturbance to competition with C. orbiculatus.
    The American Midland Naturalist 07/2014; 172(1):25-36. DOI:10.1674/0003-0031-172.1.25