Search Results
Results 501 - 550 of 837
< 6 7 8 9 10 11 12 13 14 15 16 >
- - 2009
Gould, Debby - - 2009
Fralish, James - - 2009
Forest community dynamics in the Illinois Ozark Hills was studied over a 300 y period that included three sequential disturbance regimes. Presettlement forest community patterns were reconstructed using witness tree data taken from the 1806-7 General Land Office survey records. Species, stem diameter and distance from the corner were obtained ...
Wolverton, Steve - - 2009
The body size of white-tailed deer (Odocoileus virginianus) increases with latitude and thus exhibits the pattern predicted by Bergmann's rule on the basis of surface to volume ratios and heat loss. This pattern is more simply explained by the distribution of food available per individual animal, which is driven by ...
Kloet, S.P. - - 2009
Changes in the standing crop of Vaccinium carymbosum shrubs were documented over 10 y at six sites throughout eastern North America. Populations in Florida, North Carolina, New Jersey and Nova Scotia showed few significant changes in standing crops over the 10 y of observation. The Ontario population had a significant ...
Moore, James - - 2009
To learn more about the basic biology of exotic relative to native tree species we conducted a greenhouse experiment comparing the germination and early seedling growth of four early successional tree species found in the southeastern United States: two exotics (Ailanthus altissima and Paulozenia tomentosa) and two natives (Liquidambar styraciflua ...
Austin, Suzanne - - 2009
We report a natural cross-fostering experiment of two House Wren (Troglodytes aedon) eggs and nestlings by Tree Swallows (Tachycineta bicolor). We document an increase in duration of the House Wren incubation period by 1-2 d, which closely corresponds to the mean incubation period of their hosts. We also documented nestling ...
Dieter, Charles - - 2009
The population of resident giant Canada geese (Branta canadensis maxima) has increased dramatically in eastern South Dakota since reintroduction efforts were initiated in the 1960s. In order to effectively manage this population of Canada geese, it is important to determine their reproductive success. We collected information on goose nesting success ...
Hough, Melissa - - 2009
Northern flying squirrels (Glaucomys sabrinus) of the Black Hills National Forest (BHNF) of South Dakota represent a unique and isolated population, but little is known about the distribution and habitat use of this population. A resource selection function (RSF) habitat model was created for northern flying squirrels (G. sabrinus) throughout ...
Schrecengost, Joshua - - 2009
Home range size, habitat use and survival of coyotes are variable throughout their range. Because coyotes have recently become established in South Carolina, we investigated their spatial distribution, habitat use and mortality on the Savannah River Site (SRS) in western South Carolina, USA. Annual survival for adult coyotes on the ...
Dawson, Jennifer - - 2009
We evaluated translocation as a restoration technique for southern fox squirrels (Sciurus niger niger) by capturing squirrels from six donor populations in coastal South Carolina and releasing them into unoccupied habitats on St. Phillips (n = 24) and Hall Islands (n = 28), South Carolina, during Jan. 1999-Jan. 2000. We ...
Gilbert, Jonathan - - 2009
We report on FMR of free-living American martens (Martes americana) in autumn and winter in northern Wisconsin. Mean body mass was significantly higher in males (1099 [+ or -] 43 [s.r.] g) than females (737 [+ or -] 28 g), with no significant difference by season. Daily mass change rates ...
Lacki, Michael - - 2009
We compared roost site characteristics of the Indiana bat (Myotis sodalis) and northern bat (M. septentrionalis), which form maternity colonies in cavities and beneath bark of dead (snags) and living trees in eastern North American forests. We used published data (n = 28 sources; n = 1145 roost trees) from ...
Hoodicoff, Corinna - - 2009
In Canada, the jeffersonii subspecies of the North American badger, Taxidea taxus, is found only within the southern portion of the province of British Columbia. The subspecies is considered endangered and small populations are believed to be the result of a loss of grassland habitat along the valley bottoms; despite ...
Lovell, John - - 2009
Tamarix ramosissima has caused dramatic morphological changes to riparian ecosystems and their bank structures over the last century throughout the southwestern United States. Growing as either small trees or dense stands of shoots, Tamarix species displace or actively outcompete native species of willow (Salix exigua) and cottonwood (Populus deltoides) on ...
Perkin, Joshuah - - 2009
Chub shiner Notropis potteri is unique among Notropis species in dietary habits, but remaining aspects of life history as well as native distribution and current population status are unresolved. Recent work in the lower Brazos River of Texas indicated a significant decline in chub shiner abundance within the native range ...
Rowe, John - - 2009
We used radio telemetry to evaluate activity area size, habitat use, diurnal activity, and the influence of weather, environmental temperatures and sex on daily movements in 18 Sternotherus odoratus in southwestern Michigan. Turtles mainly moved within the highly vegetated littoral zone but two individuals used wet meadow areas adjacent to ...
Hinners, Sarah - - 2009
Wild pollinators provide important services in both wild and human-dominated ecosystems, yet this group may be threatened by widespread anthropogenic landscape change. We explored the responses of wild bees to exotic floral species and novel habitat in a fragmented, suburban landscape using pollen grain identification. Pollen loads from bee specimens ...
Montgomery, B.R. - - 2009
Introduced plants may compete for pollination with native species, leading to increased pollinator limitation for one or both species. In this study, 1 test the hypothesis that the introduced plant Euphorbia esula (Euphorbiaceae, leafy spurge) competes for pollination with the native prairie perennial Sisyrinchium campestre (Iridaceae, blue-eyed grass). A breeding ...
Delaney, Kevin - - 2009
After defoliation occurs leaf photosynthetic rate (Pn) can increase, decrease or remain unchanged relative to control uninjured leaves depending on the plant species. With common milkweed Asclepias syriaca (Asclepiadaceae) we conducted 27 experiments with insect herbivory or mechanical tissue removal to examine whether A. syriaca leaf Pn reductions were correlated ...
Hsia, Jennifer - - 2009
Small granivorous mammals may have marked effects on plants through their seed predation. Using live-trapping efforts and tagged sugar maple (Acer saccharum) seeds in 2006 at eight mixed forest sites in the northern Great Lakes region, we asked: (1) Were small mammals seed dispersers or predators at these sites? (2) ...
- - 2009
- - 2009
Seve, Fuaao - - 2009
O'Connor, Teresa - - 2009
Webster, Diane - - 2009
< 6 7 8 9 10 11 12 13 14 15 16 >