Human Skeletal Populations Of The Northwestern Plains: A Preliminary Analysis

Abstract

Preliminary analysis has been completed on samples of American Indian skeletons from three museums in Wyoming, and special collections from Montana, Wyoming, northern Colorado and western Nebraska. All 84 specimens come from burial sites within the Northwestern Plains geographical region, and cover a temporal span of approximately 5,000 years. Fifty-four cranial and postcranial measurements, and 47 morphological observations were recorded for each complete specimen; and means and indices were compared among the various regional and temporal samples. Important temporal changes and a few regional differences are suggested by the preliminary results.     

Comparative nest habitat characteristics of sympatric White‐tailed Haliaeetus albicilla and Golden Eagles Aquila chrysaetos in western Scotland

Capsule Golden and White‐tailed Eagles selected different habitats for nesting.

Aim To investigate differences in nesting habitat used by sympatrically breeding eagles in western Scotland, following reintroduction of White‐tailed Eagles from 1975 onwards.

Methods Nest‐site locations from national surveys in 2003–05 were entered into a geographical information system (GIS) in order to measure a set of geographic parameters for each nest site. Binary logistic regression with backwards deletion of non‐significant terms was used to derive minimum adequate models at two spatial scales of the likelihood of an eagle nest belonging to one species or the other. We compared changes in occupancy between 1992 and 2003 of Golden Eagle territories inside and outside a GIS model of potential White‐tailed Eagle habitat and according to proximity to White‐tailed Eagle nests.

Results White‐tailed Eagles nested at lower altitudes than Golden Eagles, in more wooded habitats with more open water close by, tending to nest in trees where these were present. There were 3359 km² of potential White‐tailed Eagle nesting habitat within 25 km of existing White‐tailed Eagle nests, containing 54 Golden Eagle territory centres, but we found no difference in change of occupancy for Golden Eagle territories close to White‐tailed Eagles compared with those further away.

Conclusion White‐tailed and Golden Eagles appear to partition nesting habitat in the west of Scotland by altitude. This corresponds with behaviour in western Norway and with the situation described in historical accounts of nest‐sites in western Scotland prior to extinction of White‐tailed Eagles. It is also consistent with recent studies showing little overlap in breeding season diet of Golden and White‐tailed Eagles in western Scotland, and likely partitioning of foraging habitat by altitude. We conclude that the likelihood of competitive exclusion is less than previously suggested.     

Hints on Research for Bird-watchers

Capsule Fledgling Golden Eagles in northern Sweden preferred clearcuts and other open forest habitats, as well as steep slopes.

Aims To study the post-fledging habitat use and ranging behaviour of juvenile Golden Eagles on their natal territories.

Methods Fourteen juvenile Golden Eagles in northern Sweden were marked with GPS transmitters and tracked until they left their natal territory.

Results Eagles fledged at the end of July–beginning of August and remained on their natal territories until October–early November. Fledged eagles' home range size before flying south was on average 41?km². Juvenile eagles showed a preference for clearcuts, coniferous forest on lichen-covered bedrock and edges between clearcuts and forest, whilst all other habitat types were used less than expected. The eagles showed a preference for steep slopes, in particular south-facing ones, whilst north-facing slopes were used less than expected.

Conclusion Golden Eagles' preference for clearcuts and steep slopes can be used in the planning and management of ‘eagle friendly’ wind farms.     

Ranging distance of resident Golden Eagles Aquila chrysaetos in western Scotland according to season and breeding status

Capsule Home-range of resident pairs of Golden Eagle was usually smaller during a successful breeding season than during winter and during an unsuccessful breeding season.

Aims To examine how Golden Eagles use space around their nests with respect to season and breeding status, and to compare home-range-use between a high and a low density region.

Methods Nine adults in six mainland Argyll ranges were radiotracked between 1991 and 1996. On the island of Mull visual observations of range-use were obtained for five ranges between 1994 and 1998.

Results Overall, Mull ranges were smaller than the Argyll ranges, reflecting the much higher range density on Mull. In both regions there were significant differences between ranging distances with season and breeding status. In general, ranging distances were smallest during breeding seasons when young were fledged.

Conclusions Studies of range-use in Golden Eagles must be conducted across a 12-month period, as a minimum.     

Spatial distribution of undulating flight displays of territorial Golden Eagles Aquila chrysaetos in Lewis,Scotland

ABSTRACT

Capsule: The undulating display flight of Golden Eagles Aquila chrysaetos has a territorial function on current consensus: we found that displays could occur at any location within a home range of territorial birds and were not more frequent at the territorial limits (as documented by a previous study) or around the nest site.

Aims: To test the null hypothesis that display activity does not spatially differ within the home range of territorial Golden Eagles.

Methods: We used 1488?h of observations of Golden Eagles between April 2003 and October 2004 (excluding November through January inclusive) on the Isle of Lewis, northwest Scotland involving primarily four territories. Territorial boundaries and nest sites were determined by the behaviour of the focal territorial birds. All flight activity was cast into three spatial categories (near-boundary, near-nest and elsewhere) and the relative occurrence of displays was referenced by overall flight activity recorded in these spatial categories.

Results: We failed to reject the null hypothesis. Prior findings of greater display rate at territory limits were not confirmed. Territorial Golden Eagles apparently displayed wherever they happened to be in their home range. There was no difference in display frequency between successful and failed breeding pairs and, within pairs, between successful and failed breeding seasons. Monthly changes in display activity did not differ from monthly changes in the presence of ‘intruding’ sub-adults. A peak in non-territorial bird activity in August and September was not reflected by a peak in display, however, we could not distinguish recently fledged ‘non-threatening’ birds in this period.

Conclusions: Undulating flight displays of Golden Eagles focused neither on territory boundaries nor the nest. Displays may be spontaneous or occur in response to the detection of potential trespassers or neighbours, however, we could not rule out any role of pair-bonding.     

Golden Plover Pluvialis apricaria breeding success on a moor managed for shooting Red Grouse Lagopus lagopus

Capsule The best estimate of breeding success was a mean of 0.57 fledglings per pair, which when combined with adult survival rates, successfully explained the observed population trend.

Aims To quantify Golden Plover breeding success on a moor managed for shooting Red Grouse Lagopus lagopus.

Methods An intensive study recorded the fate of individual Golden Plover nests and, using radiotelemetry, chicks. The factors associated with mortality were examined, allowing the construction of a model of breeding success. Adult survival was estimated from return rates of colour-ringed birds.

Results Estimated rates of daily nest survival during laying (0.8636) were significantly lower than during incubation (0.9913). The daily survival rate of chicks less than nine days (0.8868) was significantly lower than for older chicks (0.9792). A population model based on these parameters overestimated the rate of nest losses, but accurately described brood survival and fledging success. Although predation rates were low, poor survival of young chicks through starvation or exposure suggest other factors were limiting breeding success at the study site.

Conclusions Predation rates of Golden Plover nests and chicks can be low on moorlands managed for shooting Red Grouse. However, in the absence of predation, other factors may still reduce chick survival and limit breeding success.     

Distribution shifts in wintering Golden Plover Pluvialis apricaria and Lapwing Vanellus vanellus in Britain

Capsule The winter distribution of Golden Plover and Lapwing has shifted east since the mid-1980s, perhaps in response to climate change.

Aims To combine analyses of winter trends on wetlands and flocks on farmland to assess the current status of Golden Plover and Lapwing in one of their main wintering regions.

Methods Winter trends were derived from monthly counts on estuaries and wetlands for the period 1974–2002 (the Wetland Bird Survey). Winter distribution on farmland was assessed using casual records of large flocks and surveys of a stratified random sample of 1-km squares (the Winter Farmland Bird Survey).

Results Regional trends showed a pronounced increase in numbers of both species since 1974 on the east coast, with a smaller increase on the south coast. Numbers in the west and north tended to decline. Flocks on farmland were concentrated in eastern Britain unlike the situation in the 1980s.

Conclusions The winter distribution of Golden Plover and Lapwing has shifted to the east, resulting in large numbers on the east coast and in the arable east of Britain. The implications of this shift, especially in relation to known habitat associations, are discussed.     

Late Cretaceous Mammal Tracks from North America

Mammal tracks from the latest Cretaceous (Campanian-Maastrichtian) of Colorado are described as Schadipes crypticus ichnogen. et ichnosp. nov., on the basis of material from the Laramie Formation in Golden, eastern Colorado. This ichnospecies, and a closely related form (Schadipes sp.) from the Mesaverde Group of western Colorado, represent the only mammal tracks so far identified from the Upper Cretaceous. A possible mammal track from North Africa (Agadirichnus elegans) was originally attributed to a lizard/lacertilian. Other purported Lower Cretaceous mammal tracks are based on isolated specimens of materials that are dubious or as yet undescribed in detail. Morphologically, Late Cretaceous mammal tracks resemble those of some modern rodents. However, based on the dominant mammalian elements of faunas at that time they are probably of marsupial or multituberculate affinity.     

Factors constraining the distribution of Golden Eagles Aquila chrysaetos in Scotland

Capsule Between 1992 and 2003 persecution appeared to be the main influential factor.

Aims To utilize temporal changes in the distribution and occupation of Golden Eagle territories in Scotland between the 1992 and 2003 national censuses to assess potential causes of regional and national population trends, by examining spatial associations with a number of potential constraints on the population.

Methods The distribution of occupied and vacant territories in the 1992 and 2003 censuses were entered as layers in a Geographical Information System (GIS), along with boundaries of biogeographical regions (Natural Heritage Zones) for regional analyses. Additional GIS layers were created for potential factors that may constrain the eagle population: the distribution and abundance of persecution incidents, new commercial conifer forests, popular mountains for hillwalkers (as surrogates for recreational activity), and the density of sheep and Red Deer (as surrogates for carrion abundance), drawn from comparable time periods to the national eagle censuses. Analyses then looked for spatial associations between eagle territory status and those constraint factors that may have influenced change in territory status.

Results We found little evidence to suggest that recreational disturbance was influential on the occupation of Golden Eagle territories, although some local effects may have occurred and further analyses are warranted. We could find evidence of only a limited number of territories having being abandoned recently due to the planting of commercial conifer forests. We also rejected the hypothesis that changes in territory occupation between national Golden Eagle censuses were influenced by change in carrion abundance. By contrast, results were consistent with the hypothesis that persecution was influential in the observed change in territory occupation between censuses, so that occupied eagle territories tended to decline where persecution was probably still influential and tended to increase where persecution had probably declined.

Conclusion In accordance with earlier predictions based on models of the demographic influence of persecution, in the central and eastern Highlands where grouse moor management predominates, the eagle population continued to decline to levels where increasingly large areas of suitable habitat are unoccupied by breeding pairs.     

Associations between distance to forest and spatial and temporal variation in abundance of key peatland breeding bird species

Capsule Negative forest edge effects were detected for Willow Ptarmigan (Red Grouse) Lagopus lagopus and Dunlin Calidris alpina.

Aims To investigate the effects of distance to forest on the abundance and changes in abundance of four key peatland breeding bird species, and to measure changes in predatory bird numbers, in the peatlands of northern Scotland.

Methods Bird surveys were carried out in 2000 at 34 plots, covering 197 km² of peatland, and 80 forestry point‐count sites, first surveyed in 1988. Habitat data were also collected in 2000. We used multi‐model inference to investigate the associations between forest distance and other habitat variables, and the abundance, and changes in abundance, of four bird species of economic or conservation importance: Red Grouse, European Golden Plover Pluvialis apricaria, Dunlin and Common Greenshank Tringa nebularia.

Results There was strong evidence that distance to forest was negatively associated with Dunlin abundance and changes in Red Grouse abundance, but only weak evidence for negative associations with Golden Plover abundance and changes in Dunlin abundance. There was no evidence of a forest distance effect on Greenshank. Among predatory birds, there were no significant increases either on peatland plots or in new forestry plantations.

Conclusions This study provides evidence that, for a given habitat quality, Dunlin densities are lower, and Red Grouse declines more likely, near to forest edges, but weak evidence only that Dunlin declines are more likely, and Golden Plover abundance lower, near to forests. These results suggest that for at least two key peatland breeding birds, forest removal is likely to benefit birds breeding on adjacent unafforested peatland.     

The genus phymatolithon in the Gulf of Maine

Summary New information on anatomy, cytology and the development of reproductive structures is presented to show that Phymatolithon is a genus distinct from both Clathromorphum and the branching members of Lithothamnium. Also, a new species of Phymatolithon, Ph. rugulosum, is described. The reproductive cycles and geographic and bathymetric distributions of Ph. laevigatum and Ph. rugulosum in the Gulf of Maine are presented and discussed. There is strong indication that the geographic distribution of crustose corallines in the region is controlled primarily by maximum summer temperatures. The depth distributions are apparently controlled primarily by decrease of light with depth, though temperatures and substrate are also factors.Now at Colorado School of Mines, Golden, Colorado, U.S.A. The necessary field work for this study was made possible through the generous support of: The American Petroleum Institute, The Geological Society of America, the ONR (through the Department of Geology and Geophysics, Massachusetts Institute of Technology) and the Woods Hole Oceanographie Institution (Contr. No. 1500).     

Diffuse knapweed (Centaurea diffusa Lam.) seedling emergence and establishment in a Colorado grassland

Knapweeds (Centaurea spp.) are damaging invaders of grasslands and other North American rangelands. A field study was conducted to determine conditions that promote diffuse knapweed (C. diffusa) emergence and establishment in a native Colorado grassland (North America). Knapweed was planted in native grassland under treatments with different opening sizes, levels of competition, knapweed seed burial and season of seeding. There was no effect of opening size where competing natives were alive, but knapweed emergence in 5- and 15-cm openings was higher than 0-cm openings where natives were killed. Reducing competition reduced fall diffuse knapweed emergence, but did not affect spring emergence. Seed burial increased knapweed emergence, but the effect varied by season. Although diffuse knapweed emergence reached 35%, only four plants survived from 3,600 seeds. This native grassland did not prevent knapweed emergence or establishment, but both were so low that rapid knapweed invasion is unlikely.     

A Woodland Burial from Boney Spring,Missouri

Abstract

A secondary burial from a peat layer adjoining the spring feeder at Boney Spring, Benton County, southwestern Missouri, is identified as a young adult male, interred about A.D. 50. The burial, associated with Early Woodland materials in the peat bed, was less than one meter from the edge of the spring feeder in deposits once saturated with water - suggesting that the burial (and associated Woodland features) was made at a time of reduced spring discharge and, perhaps, during a period of reduced precipitation. The burial is well within the limits of characteristics recorded for eastern Archaic groups, lending support to the hypothesis of continuity between the Archaic and Early Woodland peoples in the American Midwest.     

The Olson Mound (39BF223) in Buffalo County,South Dakota

Abstract

A low, dome-shaped, earthern tumulus was excavated during the summer of 1957. The mound contained poorly preserved remains of a secondary burial in a shallow, sub-mound pit. Three individuals were represented in the burial.

Artifactual associations were sparse.They consisted of one simplestamped body sherd, 2 end scrapers,4 knives; 1 drill and 3 mealing stone fragments.

Similarities between this mound and other sites in the vicinity are discussed. An appendix contains the analysis of the identifiable skeletal material.     

T-W-DIamond,a Stone Ring Site in Northern Colorado

Abstract

The T-W-Diamond Site, 4LR200, is a large teepee ring village on the? edge of the High Plains in northern Colorado. Seventeen out of the 47 remaining stone ring areas were excavated or tested by the Colorado State University Archae-ological Field School in 1971. Artifacts, fire hearths and midden materials were scarce but indicated the domestic nature of the structures. Stone and ceramic artifacts indicate cultural affiliations with the Late Prehistoric period as reported at Birdshead Cave, and the Piney Creek sites in Wyoming; and at the Agate Bluff Rock Shelters, and the Dipper Gap site in northern Colorado. Carbon-14 dates of A. D. 1020±230 years and A.D. 1170±220 years support the time of the occupation. A third date of A.D. 400±340 seems improbably early. It is hypothesized that the village was occupied seasonally for a short time by a small group of people, perhaps of Shoshonean affiliation, exploiting a mixedbase subsistence economy.     

A Collection of Historic Material from the Ft. Collins City Museum,Ft. Collins,Colorado

Abstract

In the late 1930’s, near Morton, Wyoming, a burial was found which included an interesting collection of artifacts. An attempt is made to answer questions regarding the date of burial, tribal origin, and sex of the individual by an analysis of the material. This material is now on exhibit at the Ft. Collins City Museum.     

A Rock Alignment in the Colorado Front Range

Abstract

Rock alignments of various sorts are found at high altitudes in the Front Range of northcentral Colorado. An example on Trail Ridge in Rocky Mountain National Park consists of a linear arrangement of rocks of unknown function. Somewhat similar structures found elsewhere in northwestern America are believed to be for ceremonial purposes, and this also may be true of the Colorado examples.     

The Jared Site: A Comanche Burial at Fort Sill,Oklahoma

Abstract

A late-19th century ravine burial from Southwest Oklahoma is described. The site is compared with historic and anthropological records to document a nineteenth century Comanche burial practice.     

The De Winton Burial:A Tragedy Across The Years

Abstract

A human burial was discovered during housebuilding operations in the community of De Winton, a few miles south of Calgary, Alberta, Canada. The fragmentary remains consist of an immature aborigine of uncertain chronological and cultural assignment.The remains are described and forensically evaluated. Floral and faunal remains in presumed association\with the burial are also described and evaluated. All materials are then interpreted with relevance to some anthropological literature and to each other.     

Archeological Investigations at the Spawn Mound, 39LK201, Lake County,South Dakota

Abstract

The Spawn Mound, 39LK201, overlooking Brant Lake in eastern South Dakota, appears to be a Plains Woodland burial mound later used by historic Dakota for secondary interments. The 1966 excavations revealed two burial pits believed to be contemporaneous with the erection of the mound, which were assigned to the Plains Woodland component, and a third pit at the center of the mound which has been assigned to the historic Dakota. Each of the Woodland burial pits contained at least three individuals buried in the flexed position. The intrusive pit contained the remains of at least two individuals, apparently “bundle” burials. These intrusive burials were accompanied by European trade items.

On the basis of the limited ceramic material from the mound, including one rim sherd of the Ellis Cord Impressed type, as well as various lithic materials recovered in the mound fill, the Plains Woodland component has been tentatively assigned to the Loseke Focus. The historic burials would appear to date between A. D. 1800-1850.